1180 nm GaInNAs quantum well based high power DBR laser diodes

We report state-of-the-art results for 1180nm (narrow linewidth) laser diodes based on GaInNAs quantum wells and show results for ridge waveguide DBR laser diode including its reliability tests. Manuscript demonstrates 500 mW output power in continuous-wave operation at room temperature, wide single mode tuning region and narrow linewidth operation. Devices reached narrow linewidth operation (>250 kHz) across their operation band.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Optoelectronics Research Centre, Tampere University of Technology
Contributors: Viheriälä, J., Aho, A., Virtanen, H., Koskinen, M., Dumitrescu, M., Guina, M.
Number of pages: 6
Publication date: 24 Feb 2017

Host publication information

Title of host publication: High-Power Diode Laser Technology XV
Publisher: SPIE
Editor: Zediker, M. S.
Article number: 100860K

Publication series

Name: Proceedings of SPIE
Publisher: SPIE
Volume: 10086
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Physics and Astronomy (miscellaneous)
Keywords: DBR laser, dbr, 1180nm, 1178nm, 1154nm, SHG

Bibliographical note

INT=fot,"Koskinen, Mervi"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1180nm VECSEL with 50 W output power

We report on the development of a high-power vertical-external-cavity surface-emitting laser (VECSEL) emitting around 1180 nm. The laser emitted 50 W of output power when the mount of the gain chip was cooled to -15°C. The output power was measured using a 97% reflective cavity end-mirror. The VECSEL was arranged to form an I-shaped cavity with a length of ∼100 mm; the gain chip and a curved dielectric mirror (RoC=150) acting as cavity end mirrors. The gain chip was grown by molecular beam epitaxy (MBE) and incorporated 10 GaInAs/GaAs quantum wells. For efficient heat extraction, the chip was capillary bonded to a diamond heat spreader which was attached to a TEC-cooled copper mount. The maximum optical-to-optical conversion efficiency of 28% was achieved for 42 W of output power and -15°C mount temperature.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, Frontier Photonics
Contributors: Kantola, E., Leinonen, T., Ranta, S., Tavast, M., Penttinen, J., Guina, M.
Publication date: 2015

Host publication information

Title of host publication: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 9349
Publisher: SPIE
Article number: 93490U
ISBN (Print): 9781628414394
ASJC Scopus subject areas: Applied Mathematics, Computer Science Applications, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Keywords: continuous wave, frequency doubling, heat management, high power, infrared, power scaling, SDL, VECSEL
Source: Scopus
Source ID: 84925666801

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1.3μm U-bend traveling wave SOA devices for high efficiency coupling to silicon photonics

We present a U-bend design for traveling wave III-V gain devices, such as semiconductor optical amplifiers and laser diodes. The design greatly simplifies the butt-coupling between the III-V chip and silicon-on-insulator photonic circuit by bringing the I/O ports on one facet. This removes the need for precise dimension control otherwise required for 2-side coupling, therefore increasing the yield of mounted devices towards 100%. The design, fabrication and characterization of the U-bend device based on Euler bend geometry is presented. The losses for a bend with a minimum bending radius of 83 μm are 1.1 dB. In addition, we present an analysis comparing the yield and coupling losses of the traditionally cleaved devices with the results that the Euler bend approach enable, with the final conclusion that the yield is improved by several times while the losses are decreased by several dB.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, VTT Technical Research Centre of Finland
Contributors: Viheriälä, J., Tuorila, H., Zia, N., Cherchi, M., Aalto, T., Guina, M.
Publication date: 2019

Host publication information

Title of host publication: Silicon Photonics XIV
Publisher: SPIE, IEEE
Editors: Reed, G. T., Knights, A. P.
Article number: 109230E
ISBN (Electronic): 9781510624887

Publication series

Name: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 10923
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Keywords: Coupling losses, Hybrid integration, III-V, Semiconductor optical amplifiers, Silicon-on-insulator

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85065404814

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1.55-μm wavelength wafer-fused OP-VECSELs in flip-chip configuration

Optically-pumped vertical external cavity surface emitting lasers (VECSELs) based on flip-chip gain mirrors emitting at the 1.55-μm wavelength range are reported. The gain mirrors employ wafer-fused InAlGaAs/InP quantum well heterostructures and GaAs/AlAs distributed Bragg reflectors, which were incorporated in a linear and a V-cavity configurations. A maximum output power of 3.65 W was achieved for a heatsink temperature of 11°C and employing a 2.2% output coupler. The laser exhibited circular beam profiles for the full emission power range. The demonstration represents more than 10-fold increase of the output power compared to state-of-the-art flip-chip VECSELs previously demonstrated at the 1.55-μm wavelength range, and opens a new perspective for developing practical VECSEL-based laser system for applications such as LIDAR, spectroscopy, communications and distributed sensing.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, CRPP, LakeDiamond SA
Contributors: Mereuta, A., Nechay, K., Caliman, A., Suruceanu, G., Gallo, P., Guina, M., Kapon, E.
Publication date: 2019

Host publication information

Title of host publication: Vertical External Cavity Surface Emitting Lasers (VECSELs) IX
Publisher: SPIE, IEEE
Editor: Keller, U.
Article number: 1090103
ISBN (Electronic): 9781510624443

Publication series

Name: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 10901
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Keywords: Optically-pumped VECSELs, Semiconductor lasers, Wafer-Fusion

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85066636665

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1800-luvun Helsingin kadonneiden konserttitilojen akustiikan mallintaminen

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Acoustics, A-Insinöörit Suunnittelu Oy, Helsinki City Museum
Contributors: Niemi, H., Kylliäinen, M., Jäppinen, J., Lindqvist, M.
Number of pages: 6
Pages: 77-82
Publication date: 1 Sep 2015

Host publication information

Title of host publication: Akustiikkapäivät 2015
Place of publication: Kuopio

Publication series

Name: Akustiikkapäivät
ISSN (Print): 1236-8202
ASJC Scopus subject areas: Acoustics and Ultrasonics

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

2D Video Coding of Volumetric Video Data

Due to the increased popularity of augmented and virtual reality experiences, the interest in representing the real world in an immersive fashion has never been higher. Distributing such representations enables users all over the world to freely navigate in never seen before media experiences. Unfortunately, such representations require a large amount of data, not feasible for transmission on today's networks. Thus, efficient compression technologies are in high demand. This paper proposes an approach to compress 3D video data utilizing 2D video coding technology. The proposed solution was developed to address the needs of 'tele-immersive' applications, such as virtual (VR), augmented (AR) or mixed (MR) reality with Six Degrees of Freedom (6DoF) capabilities. Volumetric video data is projected on 2D image planes and compressed using standard 2D video coding solutions. A key benefit of this approach is its compatibility with readily available 2D video coding infrastructure. Furthermore, objective and subjective evaluation shows significant improvement in coding efficiency over reference technology.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Nokia Technologies
Contributors: Schwarz, S., Hannuksela, M. M., Fakour-Sevom, V., Sheikhi-Pour, N.
Number of pages: 5
Pages: 61-65
Publication date: 5 Sep 2018

Host publication information

Title of host publication: 2018 Picture Coding Symposium, PCS 2018 - Proceedings
Publisher: IEEE
Article number: 8456265
ISBN (Print): 9781538641606
ASJC Scopus subject areas: Signal Processing, Media Technology

Bibliographical note

INT=sgn,"Sheikhi-Pour, Nahid"

Source: Scopus
Source ID: 85053915056

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

360 panorama super-resolution using deep convolutional networks

We propose deep convolutional neural network (CNN) based super-resolution for 360 (equirectangular) panorama images used by virtual reality (VR) display devices (e.g. VR glasses). Proposed super-resolution adopts the recent CNN architecture proposed in (Dong et al., 2016) and adapts it for equirectangular panorama images which have specific characteristics as compared to standard cameras (e.g. projection distortions). We demonstrate how adaptation can be performed by optimizing the trained network input size and fine-tuning the network parameters. In our experiments with 360 panorama images of rich natural content CNN based super-resolution achieves average PSNR improvement of 1.36 dB over the baseline (bicubic interpolation) and 1.56 dB by our equirectangular specific adaptation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Nokia Technologies
Contributors: Fakour-Sevom, V., Guldogan, E., Kämäräinen, J.
Number of pages: 7
Pages: 159-165
Publication date: 2018

Host publication information

Title of host publication: VISIGRAPP 2018 - Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications
Volume: 4
Publisher: SCITEPRESS
ISBN (Electronic): 9789897582905
ASJC Scopus subject areas: Computer Vision and Pattern Recognition, Computer Graphics and Computer-Aided Design, Artificial Intelligence
Keywords: Deep convolutional neural network, Equirectangular panorama, Super-resolution, Virtual reality

Bibliographical note

EXT="Guldogan, Esin"

Source: Scopus
Source ID: 85047846712

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

405-nm pumped Ce3+-doped silica fiber for broadband fluorescence from cyan to red

A pure Ce-doped silica fiber is fabricated using modified chemical vapor deposition (MCVD) technique. Fluorescence characteristics of a Ce-doped silica fiber are experimentally investigated with continuous wave pumping from 440 nm to 405 nm. Best pump absorption and broad fluorescence spectrum is observed for ∼ 405 nm laser. Next, the detailed analysis of spectral response as a function of pump power and fiber length is performed. It is observed that a-10dB spectral width of ∼ 280 mn can be easily achieved with different combinations of the fiber length and pump power. Lastly, we present, for the first time to the best of our knowledge, a broadband fluorescence spectrum with-10dB spectral width of 301 nm, spanning from ∼ 517.36 nm to ∼ 818 nm, from such fibers with non-UV pump lasers.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, Aston University, Fiber Optics Research Center of the Russian Academy of Sciences, Russian Academy of Sciences
Contributors: Yadav, A., Chichkov, N. B., Gumenyuk, R., Zherebtsov, E., Melkumov, M. A., Yashkov, M. V., Dianov, E. M., Rafailov, E. U.
Publication date: 2019

Host publication information

Title of host publication: Optical Components and Materials XVI
Publisher: SPIE, IEEE
Editors: Digonnet, M. J. F., Jiang, S.
Article number: 1091406
ISBN (Electronic): 9781510624702

Publication series

Name: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 10914
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Keywords: Broadband spectrum, Ce-doped fiber, Ce-ion, Rare earth doped

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85066046508

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

50 W VECSEL emitting at 1180 nm

We report a 50 W VECSEL emitting at 1180 nm. The gain chip was grown by MBE and TEC-cooled. The maximum power was measured for a mount temperature of -15◦C.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications
Contributors: Kantola, E., Leinonen, T., Penttinen, J., Tavast, M., Ranta, S., Guina, M.
Publication date: 2015

Host publication information

Title of host publication: 2015 Conference on Lasers and Electro-Optics Europe - European Quantum Electronics Conference, 21.-25.6. Munich, Germany : CB_3_1
Publisher: OSA
ISBN (Print): 978-1-4673-7475-0

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

8th Nordic Conference on Construction Economics and Organization

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Civil Engineering, Research area: Construction Management and Economics, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development
Contributors: Kähkönen, K. (ed.)
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English

Research output: Contribution to journalSpecial issueScientificpeer-review

A 1.5-W frequency doubled semiconductor disk laser tunable over 40 nm at around 745 nm

1.5 W of output power was obtained in the challenging wavelength range between 700 and 800 nm by frequency doubling a wafer-fused 1.49-μm semiconductor disk laser pumped with 980-nm diodes. A bismuth borate crystal was used for doubling the frequency. A total optical-to-optical efficiency of 8.3 % was achieved. The laser was tunable from 720 to 764 nm with an intracavity birefringent plate. The beam quality parameter M2 remained below 1.5 at all power levels. The laser is attractive for biomedical applications such as photodynamic therapy that benefit from the low absorption of light in tissue in this spectral range.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Ultrafast and intense lasers, Research group: Semiconductor Technology and Applications, Optoelectronics Research Centre, Tampere University of Technology, Ecole Polytech Fed Lausanne, Ecole Polytechnique Federale de Lausanne, Lab Phys Nanostruct
Contributors: Saarinen, E. J., Lyytikäinen, J., Ranta, S., Rantamäki, A., Saarela, A., Sirbu, A., Iakovlev, V., Kapon, E., Okhotnikov, O. G.
Number of pages: 8
Publication date: 2016

Host publication information

Title of host publication: Proceedings of SPIE : Vertical External Cavity Surface Emitting Lasers (VECSELs) VI
Volume: 9734
Publisher: SPIE
Article number: 97340P-8

Publication series

Name: Spie conference proceedings
Publisher: SPIE
ISSN (Electronic): 0277-786X

Bibliographical note

INT=orc,"Saarela, Antti"
JUFOID=71479

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A Batteryless Semi-Passive RFID Sensor Platform

Semi-passive RFID sensor possesses longer interrogation distance and advanced functionalities compared with the fully passive ones. Utilizing the wireless energy harvesting, we present a semi-passive RFID sensor platform without the reliance on the external battery. We outline the sensor system development and conduct the wireless measurement of the prototype to demonstrate its performance and functionality.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: BioMediTech, Research group: Wireless Identification and Sensing Systems Research Group, Heriot-Watt University
Contributors: Ma, S., Pournoori, N., Sydänheimo, L., Ukkonen, L., Björninen, T., Georgiadis, A.
Number of pages: 3
Pages: 171-173
Publication date: 1 Sep 2019

Host publication information

Title of host publication: 2019 IEEE International Conference on RFID Technology and Applications (RFID-TA)
Publisher: IEEE
ISBN (Print): 978-1-7281-0590-1
ISBN (Electronic): 978-1-7281-0589-5
Keywords: semi-passive RFID, UHF RFID, temperature sensor, RF energy harvesting
Source: Bibtex
Source ID: 8892176

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A bibliometric study on authorship trends and research themes in knowledge management literature

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Business Data Research Group, Research group: Business Ecosystems, Networks and Innovations, Research group: Knowledge and Learning Research Center, University of Exeter, Lappeeranta University of Technology
Contributors: Jussila, J. J., Mustafee, N., Aramo-Immonen, H., Menon, K., Hajikhani, A., Helander, N.
Number of pages: 9
Pages: 389-397
Publication date: 7 Jun 2017

Host publication information

Title of host publication: 12th International Forum on Knowledge Asset Dynamics, St. Petersburg, Russia 7-9 June 2017 : Knowledge Management in the 21th Century: Resilience, Creativity and Co-creation
Volume: 12
Place of publication: St. Petersburg, Russia
ISBN (Electronic): 978-88-96687-10-9
Keywords: bibliometrics

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstracting Application Development for Resource Constrained Wireless Sensor Networks

Ubiquitous computing is a concept whereby computing is distributed across smart objects surrounding users, creating ambient intelligence. Ubiquitous applications use technologies such as the Internet, sensors, actuators, embedded computers, wireless communication, and new user interfaces. The Internet-of-Things (IoT) is one of the key concepts in the realization of ubiquitous computing, whereby smart objects communicate with each other and the Internet. Further, Wireless Sensor Networks (WSNs) are a sub-group of IoT technologies that consist of geographically distributed devices or nodes, capable of sensing and actuating the environment.

WSNs typically contain tens to thousands of nodes that organize and operate autonomously to perform application-dependent sensing and sensor data processing tasks. The projected applications require nodes to be small in physical size and low-cost, and have a long lifetime with limited energy resources, while performing complex computing and communications tasks. As a result, WSNs are complex distributed systems that are constrained by communications, computing and energy resources. WSN functionality is dynamic according to the environment and application requirements. Dynamic multitasking, task distribution, task injection, and software updates are required in field experiments for possibly thousands of nodes functioning in harsh environments.

The development of WSN application software requires the abstraction of computing, communication, data access, and heterogeneous sensor data sources to reduce the complexities. Abstractions enable the faster development of new applications with a better reuse of existing software, as applications are composed of high-level tasks that use the services provided by the devices to execute the application logic.

The main research question of this thesis is: What abstractions are needed for application development for resource constrained WSNs? This thesis models WSN abstractions with three levels that build on top of each other: 1) node abstraction, 2) network abstraction, and 3) infrastructure abstraction. The node abstraction hides the details in the use of the sensing, communication, and processing hardware. The network abstraction specifies methods of discovering and accessing services, and distributing processing in the network. The infrastructure abstraction unifies different sensing technologies and infrastructure computing platforms.

As a contribution, this thesis presents the abstraction model with a review of each abstraction level. Several designs for each of the levels are tested and verified with proofs of concept and analyses of field experiments. The resulting designs consist of an operating system kernel, a software update method, a data unification interface, and all abstraction levels combining abstraction called an embedded cloud.

The presented operating system kernel has a scalable overhead and provides a programming approach similar to a desktop computer operating system with threads and processes. An over-the-air update method combines low overhead and robust software updating with application task dissemination. The data unification interface homogenizes the access to the data of heterogeneous sensor networks. A unification model is used for various use cases by mapping everything as measurements. The embedded cloud allows resource constrained WSNs to share services and data, and expand resources with other technologies. The embedded cloud allows the distributed processing of applications according to the available services. The applications are implemented as processes using a hardware independent description language that can be executed on resource constrained WSNs. The lessons of practical field experimenting are analyzed to study the importance of the abstractions. Software complexities encountered in the field experiments highlight the need for suitable abstractions.

The results of this thesis are tested using proof of concept implementations on real WSN hardware which is constrained by computing power in the order of a few MIPS, memory sizes of a few kilobytes, and small sized batteries. The results will remain usable in the future, as the vast amount, tight integration, and low-cost of future IoT devices require the combination of complex computation with resource constrained platforms.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Pervasive Computing, Research area: Computer engineering
Contributors: Laukkarinen, T.
Number of pages: 104
Publication date: 4 Sep 2015

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3542-0
ISBN (Electronic): 978-952-15-3567-3
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1306
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

A Capacity Bound for mmWave-based Channel Access in Ultra-Dense Wearable Deployments

In this paper, we address mmWave (millimeter-wave) channel access protocols operating in extremely high frequency bands. We argue that the anticipated mass use of wearable wireless devices over such protocols is likely to soon produce ultra-dense personal network deployments, especially in commuter scenarios. To this end, this work primarily focuses on a specific area of interest, where wearable devices all hear each other. By introducing an adequate mmWave-based protocol abstraction model, we are interested in characterizing the system capacity bound for the entire class of possible channel access schemes. In particular, we establish a lower bound on system operation by thoroughly investigating a decentralized random-access model. Given that its asymptotic behavior is determined by a simple and elegant expression, the obtained performance estimate may serve as a useful reference for subsequent performance optimization. Therefore, our results constitute an important building block, which allows accounting for more realistic directional antenna patterns, as well as aids in future protocol design.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Emerging Technologies for Nano-Bio-Info-Cogno, International Insitute for Advanced Aerospace Technologies of St. Petersburg State University of Aerospace Instrumentation, Intel Corporation
Contributors: Galinina, O., Turlikov, A., Pyattaev, A., Johnsson, K., Andreev, S., Koucheryavy, Y.
Number of pages: 7
Pages: 298-304
Publication date: 2015

Host publication information

Title of host publication: 2015 7th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)
Publisher: IEEE
ISBN (Print): 978-1-4673-9282-2

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Accessible Games for Blind Children, Empowered by Binaural Sound

Accessible games have been researched and developed for many years, however, blind people still have very limited access and knowledge of them. This can pose a serious limitation, especially for blind children, since in recent years electronic games have become one of the most common and wide spread means of entertainment and socialization. For our implementation we use binaural technology which allows the player to hear and navigate the game space by adding localization information to the game sounds. With our implementation and user studies we provide insight on what constitutes an accessible game for blind people as well as a functional game engine for such games. The game engine developed allows the quick development of games for the visually impaired. Our work provides a good starting point for future developments on the field and, as the user studies show, was very well perceived by the visually impaired children that tried it.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Science For You, N.P.C. - SciFY, Ionian University
Contributors: Drossos, K., Zormpas, N., Giannakopoulos, G., Floros, A.
Number of pages: 8
Pages: 5:1-5:8
Publication date: Jul 2015

Host publication information

Title of host publication: Proceedings of the 8th ACM International Conference on PErvasive Technologies Related to Assistive Environments
Place of publication: New York, NY, USA
Publisher: Association for Computing Machinery (ACM)
ISBN (Print): 978-1-4503-3452-5

Publication series

Name: PETRA '15
Publisher: ACM
Keywords: audio only games, auditory interface, binaural processing, games for the visually impaired
Source: Bibtex
Source ID: urn:898885533f4d5f18cc8f061fc07b3ceb

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Accurate depth estimation from a sequence of monocular images supported by proprioceptive sensors

This paper describes an extended Kalman filter based algorithm for fusion of monocular vision measurements, inertial rate sensor measurements, and camera motion. The motion of the camera between successive images generates a baseline for range computations by triangulation. The recursive estimation algorithm is based on extended Kalman filtering. The depth estimation accuracy is strongly affected by mutual observer and feature point geometry, measurement accuracy of observer motion parameters and line of sight to a feature point. The simulation study investigates how the estimation accuracy is affected by the following parameters: linear and angular velocity measurement errors, camera noise, and observer path. These results draw requirements to the instrumentation and observation scenarios. It was found that under favorable conditions the error in distance estimation does not exceed 2% of the distance to a feature point.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Dynamic Systems, Research area: Measurement Technology and Process Control, Research group: Positioning
Contributors: Davidson, P., Raunio, J. P., Piché, R.
Number of pages: 9
Pages: 249-257
Publication date: 2016

Host publication information

Title of host publication: 23rd Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2016 - Proceedings
Publisher: State Research Center of the Russian Federation
ISBN (Electronic): 9785919950370
ASJC Scopus subject areas: Computer Networks and Communications, Signal Processing, Electrical and Electronic Engineering, Information Systems
Keywords: Computer vision, Gyroscope, IMU, Odometer, Structure from motion
Source: Scopus
Source ID: 84979573597

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Accurate impedance model of grid-connected inverter for small-signal stability assessment in high-impedance grid

General information

Publication status: Accepted/In press
MoE publication type: A1 Journal article-refereed
Organisations: Electrical Engineering, Research area: Power engineering, Research group: Power electronics, Automation Technology and Mechanical Engineering, Research group: Automation and Systems Theory
Contributors: Messo, T., Roinila, T., Aapro, A., Luhtala, R.
Publication date: 1 Feb 2019
Peer-reviewed: Yes

Publication information

Journal: IEEJ JOURNAL OF INDUSTRY APPLICATIONS
Volume: 8
Issue number: 3
Article number: 3
ISSN (Print): 2187-1094
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

A Co-creation Centre for University–Industry Collaboration – A Framework for Concept Development

Abstract It is argued in general that future success in effective innovation creation is built on the ability to connect and manage talent, partnerships and related practical innovation processes. This makes it challenging for a university to develop an ecosystem of knowledge creation. The full benefit from a university can only be obtained if the university and society are organically linked together. The needs of society have to be at the centre of a university's activities, and flexible adjustment to changing needs is necessary but often lacking. Campus management has a major role in the facilitation of multidisciplinary interaction between students, scientists, entrepreneurs and other industry partners that inspire each other with different perspectives on the same subject. One significant tool to support open innovation with diverse stakeholders is to provide supportive spaces with relevant services. This paper aims to identify the requirements of a Co-creation Centre as a concept serving the third role of auniversity. The literature review was conducted and, based on the result, this paper proposes a conceptual framework for capturing the key requirements for developing a multiuser Co-creation Centre. The framework consists ofthe requirements on the demand and supply sides of campus management. The main findings in this paper are that different modes of knowledge conversion have different capabilities tosupport knowledge co-creation requirements. Knowledge co-creation process requirements in the multiuser Co-creation Centre for university–industry collaboration are best supported by originating “Ba”, which means the place where individuals share feelings, emotions, experiences, and mental models and the place where the knowledge-creation process begins. The results contribute to the concept development in campus management and provide a starting point for evaluating the success of multidisciplinary and multi-actor innovation environments.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering
Contributors: Huhtelin, M., Nenonen, S.
Pages: 137 - 145
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
Keywords: spaces and services.
Source: Bibtex
Source ID: urn:eaca1c4af451146bd5fea3acaaa20e86

Research output: Contribution to journalArticleScientificpeer-review

A computationally feasible optimization approach to inverse SAR translational motion compensation

The traditional approach to inverse synthetic aperture radar translational motion compensation is to solve the problem in the two distinct parts of range alignment and autofocus. In this paper, we follow this practice and propose an approach based on the global range alignment and contrast optimization autofocus methods. The proposed range alignment procedure parametrizes the track as a spline polynomial and minimizes the loss function determined by the sum of the squared envelope differences. The necessary numerical global optimization is performed with the differential evolution algorithm. The solution of the autofocus problem is produced with first order numerical optimization, as we solve it by using an expression derived for the gradient of the loss function. In this paper, we consider the back-projection case but the proposed approach is easily extended to other reconstruction techniques. We use simulated inverse synthetic aperture radar data to demonstrate the proposed approach and to illustrate its computational efficiency.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: MMDM, Finnish Defence Research Agency
Contributors: Vehmas, R., Jylhä, J., Väilä, M., Kylmälä, J.
Number of pages: 4
Pages: 17-20
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 12th European Radar Conference (EuRAD 2015)
Publisher: IEEE
ISBN (Print): 978-2-87487-041-5

Bibliographical note

EXT="Kylmälä, Jarkko"
EXT="Vehmas, Risto"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A continuum damage model for creep fracture and fatigue analyses

In this paper a thermodynamically consistent formulation for creep and creep-damage modelling is given. The model is developed for isotropic solids by using proper expressions for the Helmholtz free energy and the complementary form of the dissipation potential, and can be proven to fulfill the dissipation inequality. Also the coupled energy equation is derived. Continuum damage model with scalar damage variable is used to facilitate simulations with tertiary creep phase. The complementary dissipation potential is written in terms of the thermodynamic forces dual to the dissipative variables of creep strain-rate and damage-rate. The model accounts for the multiaxial stress state and the difference in creep rupture time in shear and axial loading as well as in tensile and compressive axial stress. In addition, the model is simple and only four to eight material model parameters are required in addition to the elasticity parameters. A specific version of the proposed model is obtained when constrained to obey the Monkman-Grant relationship between the minimum creep strain-rate and the creep rupture time. The applicability of the Monkman-Grant hypothesis in the model development is discussed. The proposed 3D-model is implemented in the ANSYS finite element software by the USERMAT subroutine. Material parameters have been estimated for the 7CrMoVTiB10-10 steel (T24) for temperatures ranging from 500 to 600 degrees of celcius. Some test cases with cyclic thermal fatigue analysis are presented.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, Valmet Technologies Oy, P.O. Box 109, FI-33101 Tampere, Finland
Contributors: Kauppila, P., Kouhia, R., Ojanperä, J., Saksala, T., Sorjonen, T.
Number of pages: 8
Pages:  887–894
Publication date: 2016

Host publication information

Title of host publication: 21st European Conference on Fracture, ECF21, 20-24 June 2016, Catania, Italy

Publication series

Name: Procedia Structural Integrity
Volume: 2
ISSN (Print): 2452-3216

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A coordination-based brokerage architecture for multi-cloud resource markets

With an increasing number of service providers in the cloud market, the competition between these is also increasing. Each provider attempts to attract customers by providing a high quality service with lowest possible cost and at the same time trying to make profit. Often, cloud resources are advertised and brokered in a spot market style, i.e., traded for immediate delivery. This paper proposes an architecture for a brokerage model specifically for multi-cloud resource spot markets that integrates the resource brokerage function across several cloud providers. We use a tuple space architecture to facilitate coordination. This architecture supports specifically multiple cloud providers selling unused resources in the spot market. To support the matching process by finding the best match between customer requirements and providers, offers are matched with regard the lowest possible cost available for the customer in the market at the time of the request. The key role of this architecture is to provide the coordination techniques built on a tuple space, adapted to the cloud spot market.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Dublin City University, Free University of Bolzano-Bozen, School of Computing Edinburgh Napier University Edinburgh
Contributors: Aldawood, S., Fowley, F., Pahl, C., Taibi, D., Liu, X.
Number of pages: 8
Pages: 7-14
Publication date: 14 Oct 2016

Host publication information

Title of host publication: Proceedings - 2016 4th International Conference on Future Internet of Things and Cloud Workshops, W-FiCloud 2016
Publisher: Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic): 9781509039463
ASJC Scopus subject areas: Computer Networks and Communications, Computer Science Applications, Information Systems
Keywords: Cloud Brokerage Architecture, Cloud Resources Market, Resource Brokerage, Spot Market, Tuple Space
Source: Scopus
Source ID: 85009829349

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Acquisition of E5 Galileo signals in Matlab

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Wireless Communications and Positioning, Department of Electronics and Communications Engineering, Wireless Communications and Positioning (WICO)
Contributors: Stepanova, E., Kudryavtsev, I., Lohan, E.
Number of pages: 7
Pages: 36-42
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Engineering
Volume: 104
ISSN (Print): 1877-7058
Ratings: 
  • Scopus rating (2015): CiteScore 0.56 SJR 0.239 SNIP 0.566
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

A Cross-Cultural and Gender-Based Perspective for Online Security: Exploring Knowledge, Skills and Attitudes of Higher Education Students.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Pervasive Computing, Research area: Information security, University of Tampere, Department of Computer Science and Information Systems, University of Jyväskylä, Department of Computer Engineering and Information Technology of College of Information and Communication Technology at the University of Dar Es Salaam, Beijing Institute of Petrochemical Technology, University of Patras
Contributors: Chaudhary, S., Zhao, Y., Berki, E., Valtanen, J., Li, L., Helenius, M., Mystakidis, S.
Pages: 57-71
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: IADIS International Journal on WWW/Internet
Volume: 13
Issue number: 1
ISSN (Print): 1645-7641
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Action and power efficiency in self-organization: The case for growth efficiency as a cellular objective in escherichia coli

Complex systems of different nature self-organize using common mechanisms. One of those is increase of their efficiency. The level of organization of complex systems of different nature can be measured as increased efficiency of the product of time and energy for an event, which is the amount of physical action consumed by it. Here we apply a method developed in physics to study the efficiency of biological systems. The identification of cellular objectives is one of the central topics in the research of microbial metabolic networks. In particular, the information about a cellular objective is needed in flux balance analysis which is a commonly used constrained-based metabolic network analysis method for the prediction of cellular phenotypes. The cellular objective may vary depending on the organism and its growth conditions. It is probable that nutritionally scarce conditions are very common in the nature, and, in order to survive in those conditions, cells exhibit various highly efficient nutrient-processing systems like enzymes. In this study, we explore the efficiency of a metabolic network in transformation of substrates to new biomass, and we introduce a new objective function simulating growth efficiency. We are searching for general principles of self-organization across systems of different nature. The objective of increasing efficiency of physical action has been identified previously as driving systems toward higher levels of self-organization. The flow agents in those networks are driven toward their natural state of motion, which is governed by the principle of least action in physics. We connect this to a power efficiency principle. Systems structure themselves in a way to decrease the average amount of action or power per one event in the system. In this particular example, action efficiency is examined in the case of growth efficiency of E. coli. We derive the expression for growth efficiency as a special case of action (power) efficiency to justify it through first principles in physics. Growth efficiency as a cellular objective of E. coli coincides with previous research on complex systems and is justified by first principles in physics. It is expected and confirmed outcome of this work. We examined the properties of growth efficiency using a metabolic model for Escherichia coli. We found that the maximal growth efficiency is obtained at a finite nutrient uptake rate. The rate is substrate dependent and it typically does not exceed 20 mmol/h/gDW. We further examined whether the maximal growth efficiency could serve as a cellular objective function in metabolic network analysis and found that cellular growth in batch cultivation can be predicted reasonably well under this assumption. The fit to experimental data was found slightly better than with the commonly used objective function of maximal growth rate. Based on our results, we suggest that the maximal growth efficiency can be considered a plausible optimization criterion in metabolic modeling for E. coli. In the future, it would be interesting to study growth efficiency as an objective also in other cellular systems and under different cultivation conditions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: BioMediTech, Wireless Innovation Laboratory at Worcester Polytechnic Institute, Assumption College, Tufts University, Complex Systems Center, University of Vermont
Contributors: Georgiev, G. Y., Aho, T., Kesseli, J., Yli-Harja, O., Kauffman, S. A.
Number of pages: 16
Pages: 229-244
Publication date: 2019

Host publication information

Title of host publication: Evolution, Development and Complexity - Multiscale Evolutionary Models of Complex Adaptive Systems
Publisher: Springer
Editors: Flores Martinez, C. L., Georgiev, G. Y., Smart, J. M., Price, M. E.
ISBN (Print): 9783030000745

Publication series

Name: Springer Proceedings in Complexity
ISSN (Print): 2213-8684
ISSN (Electronic): 2213-8692
ASJC Scopus subject areas: Applied Mathematics, Modelling and Simulation, Computer Science Applications
Keywords: Action efficiency, Constraint-based modeling, Metabolism, Microorganism, Principle of least action

Bibliographical note

jufoid=84878

Source: Scopus
Source ID: 85071889407

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Action recognition using the 3D dense microblock difference

This paper describes a framework for action recognition which aims to recognize the goals and activities of one or more human from a series of observations. We propose an approach for the human action recognition based on the 3D dense micro-block difference. The proposed algorithm is a two-stage procedure: (a) image preprocessing using a 3D Gabor filter and (b) a descriptor calculation using 3D dense micro-block difference with SVM classifier. At the first step, an efficient spatial computational scheme designed for the convolution with a bank of 3D Gabor filters is present. This filter intensifies motion using a convolution for a set of 3D patches and arbitrarily-oriented anisotropic Gaussian. For preprocessed frames, we calculate the local features such as 3D dense micro-block difference (3D DMD), which capture the local structure from the image patches at high scales. This approach is processing the small 3D blocks with different scales from frames which capture the microstructure from it. The proposed image representation is combined with fisher vector method and linear SVM classifier. We evaluate the proposed approach on the UCF50, HMDB51 and UCF101 databases. Experimental results demonstrate the effectiveness of the proposed approach on video with a stochastic textures background with comparisons of the state-of-The-Art methods.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Don State Technical University, Moscow State University of Technology 'Stankin', Beijing Jiaotong University
Contributors: Voronin, V., Pismenskova, M., Zelensky, A., Cen, Y., Nadykto, A., Egiazarian, K.
Publication date: 2018

Host publication information

Title of host publication: Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies II
Publisher: SPIE
Article number: 108020O
ISBN (Electronic): 9781510621879

Publication series

Name: Proceedings of SPIE
Volume: 10802
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Keywords: 3D Gabor filter., Action recognition, Micro-block difference, Texture

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85057423236

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Active corrosion phase as a service life extension of concrete facades

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Research area: Structural Engineering
Contributors: Köliö, A., Lahdensivu, J., Pentti, M.
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the Eurocorr 2015, European corrosion congress
Publisher: Austrian Society for Metallurgy and Materials (ASMET); EFC; DECHEMA

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Actors’ agency in the routines of innovation project portfolio management

Innovation project portfolio management (IPPM) is carried out through various routines of assessing, prioritizing, selecting and coordinating projects. Empirical research increasingly suggests that the official routines are not necessarily used, but personnel use agency, i.e., individual situation-specific judgment in their practice of IPPM. This agency perspective is not sufficiently understood, so far. The purpose of this study is to explore different actors’ agency in implementing IPPM, covering managers, personnel and external stakeholders. The goal is increased knowledge on implementing IPPM in dynamic contexts and development of propositions for better IPPM frameworks that account for different actors’ agency. The qualitative case study with two innovative project-based firms reveals different approaches to IPPM agency across four different actor categories. The nature of the innovation project portfolios is discussed especially in terms of uncertainty and the maturity of the IPPM routines as situation-specific factors relevant in enabling and restraining project actors’ agency in IPPM. The results contribute by proposing agency as a novel perspective to IPPM research, showing evidence of it in highly innovative contexts, and thereby enabling the theorization of situation-specific practice of IPPM.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial Engineering and Management, Research group: Center for Research on Operations Projects and Services, Research group: Center for Research on Project and Service Business (CROPS)
Contributors: Martinsuo, M., Vuorinen, L.
Number of pages: 26
Publication date: 26 Jun 2019

Host publication information

Title of host publication: Proceedings of the EURAM European Academy of Management Conference 2019 : 26-28 June 2019, Lisbon, Portugal
Publisher: European Academy of Management, EURAM
ISBN (Electronic): 978-2-9602195-1-7

Publication series

Name: EURAM conference
ISSN (Print): 2466-7498

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Adapting service-based working culture as the key driver for organisational creativity and innovation

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics
Contributors: Ketonen-Oksi, S.
Publication date: 10 Jun 2016

Host publication information

Title of host publication: Towards a new architecture of knowledge : Big Data, culture and creativity : IFKAD 2016-11th International Forum on Knowledge Asset Dynamics, Dresden 15-17.6.2016, Germany
ISBN (Print): 978-88-96687-09-3

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Adaptive Feedback in Local Coordinates for Real-time Vision-Based Motion Control Over Long Distances

We studied the differences in noise-effects, depth-correlated behavior of sensors, and errors caused by mapping between coordinate systems in robotic applications of machine vision. In particular, the highly range-dependent noise densities for semi-unknown object detection were considered. An equation is proposed to adapt estimation rules to dramatic changes of noise over longer distances. This algorithm also benefits the smooth feedback of wheels to overcome variable latencies of visual perception feedback. Experimental evaluation of the integrated system is presented with/without the algorithm to highlight its effectiveness.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Automation and Hydraulic Engineering, Research group: Innovative Hydraulic Automation, Signal Processing, Cargotec Corporation
Contributors: M. Aref, M., Astola, P., Vihonen, J., Tabus, I., Ghabcheloo, R., Mattila, J.
Number of pages: 6
Publication date: 2018

Host publication information

Title of host publication: International Conference on Robotics and Mechantronics : (ICRoM 2017)
Volume: 320
Publisher: IOP Publishing Ltd.
Article number: 012009

Publication series

Name: IOP conference series : materials science and engineering
ISSN (Print): 1757-8981
ISSN (Electronic): 1757-899X

Bibliographical note

EXT="Vihonen, Juho"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Adaptive fuzzy inference system based directional median filter for impulse noise removal

Noise filtering in presence of important image detail information is considered as challenging task in imaging applications. Use of fuzzy logic based techniques is capturing more focus since last decade to deal with these challenges. In order to tackle conflicting issues of noise smoothing and detail preservation, this paper presents a novel approach using adaptive fuzzy inference system for random valued impulse noise detection and removal. The proposed filter uses the intensity based directional statistics to construct adaptive fuzzy membership functions which plays an important role in fuzzy inference system. Fuzzy inference system constructed in this way is used by the noise detector for accurate classification of noisy and noise-free pixels by differentiating them from edges and detailed information present in an image. After classification of pixels, noise adaptive filtering is performed based on median and directional median filter using the information provided by the noise detector. Simulation results based on well known quantitative measure i.e., peak-signal-to-noise ratio (PSNR) show the effectiveness of proposed filter.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, International Islamic University Islamabad
Contributors: Habib, M., Hussain, A., Rasheed, S., Ali, M.
Number of pages: 9
Pages: 689-697
Publication date: 1 May 2016
Peer-reviewed: Yes

Publication information

Journal: AEU International Journal of Electronics and Communication
Volume: 70
Issue number: 5
ISSN (Print): 1434-8411
Ratings: 
  • Scopus rating (2016): CiteScore 1.49 SJR 0.32 SNIP 0.964
Original language: English
ASJC Scopus subject areas: Electrical and Electronic Engineering
Keywords: Adaptive threshold, Fuzzy inference system, Noise detection, Noise removal, Random-valued impulse noise

Bibliographical note

INT=elt,"Ali, Mubashir"

Source: Scopus
Source ID: 84959549053

Research output: Contribution to journalArticleScientificpeer-review

Advanced coatings by novel high-kinetic thermal spray processes

Thermal spraying includes a group of coating processes in which metallic and non-metallic materials are spray deposited as fine particles in a molten or semi-molten condition, or even in fully solid state to form a coating. Thermal spraying allows deposition of relatively thick coatings, from some tens of micrometers up to several millimeters in thickness. Thermally sprayed coatings are used in different applications including protective and functional coatings in mechanical engineering, energy technology, biomedical, steel, automotive and aerospace technologies and in many other industrial sectors. Novel high-kinetic spray processes, e.g., the high velocity air-fuel (HVAF) technology are the latest developments in the area and therefore they are actively studied in the framework of the Hybrid Materials research program in collaboration with Finnish industrial and research partners. Novel multifunctional coatings are under development for specific industrial applications.

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Materials Science, Research group: Surface Engineering
Contributors: Matikainen, V., Koivuluoto, H., Milanti, A., Vuoristo, P.
Number of pages: 5
Pages: 46-50
Publication date: 9 Feb 2015
Peer-reviewed: Unknown

Publication information

Journal: Materia
Volume: 73
Issue number: 1
ISSN (Print): 1459-9694
Original language: English
ASJC Scopus subject areas: Surfaces, Coatings and Films
Keywords: thermal spraying, HVOF, HVAF

Research output: Contribution to journalArticleProfessional

Advocator, jester, spokesperson, provocateur and boundary spanner? Exploring different communication styles at twitter

Purpose – The recent development of digital communication technologies, and of social media in particular, have enhanced more direct communications between companies and their customers. Among many other things, the use of social media has become considerably popular in customer services. However, communicating with different types of customers is not easy. More profound understanding is needed about how to succeed in communicating with the customers in the increasingly impersonal, yet often emotionally sensitive online environments.

Design/methodology/approach – Based on an extensive empirical data from Twitter discussions on climate change and energy industry, the analysis will follow the ideas and concepts of research on personalities and motivation in the context of social media.

Originality/value – By theorising the impacts of human personality traits to a person´s communication style in social media, in accordance with the person´s own choices of roles and motivations to communicate in social media, this study will provide companies new insight on how to approach their customers in online environments.

Practical implications – This study offers significant information for any company that wants to improve their customer service through social media. That is, by presenting the early phase taxonomy for different social media communication styles used in Twitter, this study will provide companies with both new insight and practical advice on how to better share information and manage discussions on their social media channels, considering the different communications styles of their customers.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Turku University of Applied Science
Contributors: Ketonen-Oksi, S., Jalonen, H.
Publication date: 6 Jun 2017

Host publication information

Title of host publication: 12th Conference proceedings of IFKAD2017 : St.Petersburg, Russia, 7-9 June 2017
ISBN (Print): 978-88-96687-10-9

Publication series

Name: Proceedings IFKAD
ISSN (Print): 2280-787X
Keywords: Social Media, Uses and Gratifications Theory, Twitter, Big Five

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A dynamical quality model to continuously monitor software maintenance

Context: several companies, particularly Small and Medium Sized Enterprises (SMEs), often face software maintenance issues due to the lack of Software Quality Assurance (SQA). SQA is a complex task that requires a lot of effort and expertise, often not available in SMEs. Several SQA models, including maintenance prediction models, have been defined in research papers. However, these models are commonly defined as "one-size-fits-All" and are mainly targeted at the big industry, which can afford software quality experts who undertake the data interpretation tasks. Objective: in this work, we propose an approach to continuously monitor the software operated by end users, automatically collecting issues and recommending possible fixes to developers. The continuous exception monitoring system will also serve as knowledge base to suggest a set of quality practices to avoid (re)introducing bugs into the code. Method: first, we identify a set of SQA practices applicable to SMEs, based on the main constraints of these. Then, we identify a set of prediction techniques, including regressions and machine learning, keeping track of bugs and exceptions raised by the released software. Finally, we provide each company with a tailored SQA model, automatically obtained from companies' bug/issue history. Developers are then provided with the quality models through a set of plug-ins for integrated development environments. These suggest a set of SQA actions that should be undertaken, in order to maintain a certain quality level and allowing to remove the most severe issues with the lowest possible effort. Conclusion: The collected measures will be made available as public dataset, so that researchers can also benefit of the project's results. This work is developed in collaboration with local SMEs and existing Open Source projects and communities.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Free University of Bolzano-Bozen, Università degli Studi Dell'Insubria, Former organisation of the author
Contributors: Lenarduzzi, V., Stan, A. C., Taibi, D., Tosi, D., Venters, G.
Number of pages: 11
Pages: 168-178
Publication date: 2017

Host publication information

Title of host publication: Proceedings of the 11th European Conference on Information Systems Management, ECISM 2017
Publisher: Academic Conferences and Publishing International Limited
ISBN (Electronic): 9781911218524
ASJC Scopus subject areas: Computer Science Applications, Information Systems, Management Information Systems
Keywords: Dynamic Software Measurement, Software Maintenance, Software Quality
Source: Scopus
Source ID: 85029853227

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A dynamic paper machine simulator for testing of model predictive control applications

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Measurement Technology and Process Control
Contributors: Yli-Fossi, T., Kuusisto, R.
Number of pages: 6
Pages: 1-6
Publication date: 2015

Host publication information

Title of host publication: Proceedings of AutomaatioXXI seminaari
Publisher: Suomen Automaatioseura ry
ISBN (Print): 978-952-5183-46-7

Publication series

Name: SAS julkaisusarja
No.: 42
ISSN (Print): 1455-6502

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Affective experiences and student engagement in higher education

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics, Research group: Novi, Language Centre, Managing digital industrial transformation (mDIT), Tampere University of Applied Science
Contributors: Helander, N., Boedeker, M., Hellsten, P., Jussila, J., Myllärniemi, J., Tukiainen, M.
Publication date: 13 Sep 2016

Host publication information

Title of host publication: 44th Annual Conference Of The European Society For Engineering Education : 12-15 September 2016, Tampere, Finland
Place of publication: Tampere
ISBN (Print): 9782873520144

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A follow-up case study of the relation of PLM Architecture, Maturity and Business processes

This paper presents findings of two research projects, which study current PLM practices and future PLM challenges of global manufacturing companies. This study focuses on maturity of PLM adoption, PLM system architectures and integrations between the tools and seeks a better understanding of a real business phenomenon by comparing case companies to models presented in literature. Data was collected by interviews and benchmarking sessions in six plus three companies in two projects. The companies are categorized by using a four level PLM maturity model. This research indicates that the PLM adoption maturity and architecture models are related to the effectiveness of PLM usage. Service and project businesses seem to be challenging aspects. This is because PLM systems are mainly used in beginning of life activities of the product. In the future also the end of life and middle of life activities should receive more support from the tools and software.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Life-cycle Management
Contributors: Vainio, V. V., Pulkkinen, A.
Number of pages: 7
Pages: 867-873
Publication date: 2016

Host publication information

Title of host publication: Product Lifecycle Management in the Era of Internet of Things : 12th IFIP WG 5.1 International Conference, PLM 2015, Doha, Qatar, October 19-21, 2015, Revised Selected Papers
Publisher: Springer New York LLC
ISBN (Print): 9783319331102

Publication series

Name: IFIP Advances in Information and Communication Technology
Volume: 467
ISSN (Print): 1868-4238
ASJC Scopus subject areas: Information Systems and Management
Keywords: PLM maturity, PLM systems architecture, Product lifecycle management
Source: Scopus
Source ID: 84964911364

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Agency relationships in global project business

Project-based firms (PBFs) serving global markets rely on local agents throughout the project life-cycle. In particular, agents are frequently used to support the PBFs efforts in project marketing, project implementation, and in provisioning of services to customers operating the delivered solutions. The purpose of this paper is to analyse principal-agent relationships in global project business from an agency perspective in order to provide further clarity to the their salient characteristics, and to identify mechanisms through which agency problems can be mitigated. Based on our analysis of earlier literature, it appears that PBFs’ principal-agent relationships with local actors during project front-end and operations phases are predominantly explorative in their nature whilst relationships during project implementation can be characterized as exploitative. Respectively, relationships of the former kind are governed by complex combinations of contractual and noncontractual mechanisms, while in relationships of the latter kind, rather simple contractual mechanisms are favoured by PBFs. Our findings imply that PBFs need to consider both the project life-cycle phase, as well as the characteristics and goals of individual agents, when designing mechanisms for governing their agency relationships.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Center for Research on Operations Projects and Services, Research group: Center for Research on Operations Projects and Services
Contributors: Ahola, T., Ståhle, M., Martinsuo, M.
Number of pages: 38
Publication date: Jun 2018

Host publication information

Title of host publication: Proceedings of EURAM18 European Academy of Management conference 2018
Publisher: European Academy of Management, EURAM
ISBN (Electronic): 978-2-9602195-0-0

Publication series

Name: EURAM conference
ISSN (Print): 2466-7498
Keywords: Global project business, agency theory, local agents, project marketing, project implementation, service provisioning

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Agile methods in performance management system development process

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Cost Management Center, Managing digital industrial transformation (mDIT)
Contributors: Stormi, K., Laine, T., Korhonen, T.
Publication date: 2016

Host publication information

Title of host publication: 10th Conference On New Directions In Management Accounting, Brussels, Belgium, December 14-16, 2016

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Air pressure difference between indoor and outdoor or staircase in multi-family buildings with exhaust ventilation system in Finland

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Research group: Concrete and Bridge Structures, Research area: Structural Engineering, Department of Civil Engineering, Research group: Building Physics, Natl Inst Hlth & Welf, Finland National Institute for Health & Welfare, Dept Environm Hlth
Contributors: Leivo, V., Kiviste, M., Aaltonen, A., Turunen, M., Haverinen-Shaughnessy, U.
Number of pages: 6
Pages: 1218-1223
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Energy Procedia
Volume: 78C
Article number: 78C
ISSN (Print): 1876-6102
Ratings: 
  • Scopus rating (2015): CiteScore 0.92 SJR 0.359 SNIP 0.562
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

ÄKK-hankkeen suositukset tulevaisuuden ääneneristysmääräyksiä koskien

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Acoustics, University of Turku, Finnish Institute of Occupational Health, Indoor Environment Laboratory
Contributors: Hongisto, V., Kylliäinen, M., Hyönä, J.
Number of pages: 6
Pages: 561-566
Publication date: 22 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
ISBN (Print): 978-952-15-3580-2
ASJC Scopus subject areas: Civil and Structural Engineering, Acoustics and Ultrasonics
Keywords: acoustics, sound insulation, airborne sound insulation, impact sound insulation, psychoacoustics

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Alipaineistetun tuulettuvan ryömintätilan rakennusfysikaaliset FEM-simuloinnit

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Tampere University of Technology, Laboratory of Civil Engineering
Contributors: Salo, J., Huttunen, P., Vinha, J.
Number of pages: 11
Pages: 413-422
Publication date: 24 Oct 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24-26.10.2017, Tampere
Volume: 2
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4023-3

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.

Bibliographical note

INT=RAK, "Salo, Juha"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Alkyl thiophene vinylene electropolymerization in C8mimPF6, potential use in solar cells

We report the electrosynthesis of a novel semiconductor polymer based on alkyl vinylthiophene derivative in the presence of an ionic liquid (IL). The polymerization was performed under galvanostatic conditions and the polymer was studied as potential donor component of a multilayer heterojunction organic solar cell (OSC). The monomer used was (E)-1,2-di-(3-octyl-2-thienyl) vinylene (OTV) and the IL used for the electropolymerization was 1-octyl-3-methylimidazole hexafluorophosphate C8mimPF6. Optical properties, stability and morphology of the polymer were analyzed using FT-IR, UV-vis, Raman and XPS spectroscopy. Voltammetry analysis and scanning electron microscopy (SEM-EDX) were also performed on the polymer. The OSC assembled with the polymer of OTV was used as electro donor and C60 as acceptor. Molybdenum trioxide (MoO3) and bathocuproine (BCP) were used as buffer layer between anode and cathode respectively. I-V curves, in the dark and under AM 1.5 solar simulator were performed to measure its efficiency.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Research group: Chemistry & Advanced Materials
Contributors: Rojas, V., Martinez, F., Bernede, J. C., Guenadez, L. C., Efimov, A., Lemmetyinen, H.
Number of pages: 13
Pages: 405-417
Publication date: May 2017
Peer-reviewed: Yes

Publication information

Journal: Materials Sciences and Applications
Volume: 8
Issue number: 5
ISSN (Print): 2153-117X
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Alpha radiation induced luminescence in solar blind spectral region

Intense luminescence in the solar blind spectral region is produced by modifying the gas atmosphere around an alpha emitter. This enables standoffdetection of alpha radiation under daylight conditions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, Photonics, Helsinki Institute of Physics
Contributors: Kerst, T., Toivonen, J.
Publication date: 2018

Host publication information

Title of host publication: CLEO : Applications and Technology, CLEO_AT 2018
Publisher: OSA - The Optical Society
ISBN (Electronic): 9781557528209
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Mechanics of Materials
Source: Scopus
Source ID: 85049133557

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Aluetehokkuuden kustannusvaikutukset

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Civil Engineering, Aalto University
Contributors: Nisula, J., Saari, A.
Number of pages: 6
Pages: 102-107
Publication date: 2015

Host publication information

Title of host publication: Nollaa parempi – Townhouse energiatehokkaassa asuinrakentamisessa
Publisher: Aalto-yliopisto
ISBN (Print): 978-952-60-6409-3
ISBN (Electronic): 978-952-60-6410-9

Publication series

Name: Aalto University publication series Crossover
No.: 9/2015
ISSN (Print): 1799-4950
ISSN (Electronic): 1799-4969

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Älykäs kaupunkilogistiikka – CityLog

During the spring of 2014 Transport Research Centre Verne from the Tampere University of
Technology carried out an urban logistics study, where the current challenges and future
development needs of city logistics was studied. In the study, this problem is approached from
the perspective of shops and services located into the city centre. A part of the inner city
centre of Tampere was chosen as a case area of the study. The main research methods were
survey and expert interviews.
According to the results, the biggest challenges in the city logistics from the perspective of shop
and service office owners are narrow loading and unloading areas, problems related on
delivery time schedules and minor possibilities to affect logistics actions. In general, lack of
communication and the sharing of information are seen be poorly used in the city logistics.
However, retailers and service carries do not see logistics as their weakness nor their main
business area. According to the findings, in future the development of city logistics should be
done more with a close relationship with transportation companies and the public sector.
The future research and development needs should focus on communication between
transport companies and their customers, optimization of loading and unloading areas and the
impacts of rapidly increasing e-commerce. Highly automated and real-time communication
solutions could offer significant benefits for unconsciousness in delivery times for example.
Also the potential of underground logistics connections should be studied together with
loading and unloading optimization.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Information Management and Logistics
Contributors: Nykänen, L., Kallionpää, E., Liimatainen, H.
Number of pages: 20
Publication date: Sep 2015

Publication information

Publisher: Tampereen teknillinen yliopisto. Liikenteen tutkimuskeskus Verne.
ISBN (Electronic): 978-952-15-3588-8
Original language: Finnish

Publication series

Name: Tampereen teknillinen yliopisto. Liikenteen tutkimuskeskus Verne. Tutkimusraportti
ISSN (Print): 2242-3486
ASJC Scopus subject areas: Engineering(all)
Keywords: city logistics, urban logistics, intelligent transport system, e-commerce, future transport system

Bibliographical note

Lupa ja versio kunnossa 12.1.2016 /KK

Research output: Book/ReportCommissioned reportProfessional

A mixed-integer linear programming approach for global discrete size optimization of frame structures

This paper proposes a method to solve discrete size optimization problems of frame structures to global optimality. Global optimality is guaranteed by reformulating the optimization problem as a mixed-integer linear program (MILP) and solving it with the branch-and-bound method. The presented mixed variable formulation extends the existing mixed variable formulation for size and topology optimization of truss structures. The MILP is obtained by adopting the simultaneous analysis and design approach. The variables consist of binary decision variables to select a profile section from the catalog, and state variables representing the member end forces. The equilibrium equations and member stiffness relations are included as constraints. The displacement and stress constraints are formulated such that for each member limit values are imposed at predefined locations along the member. The proposed method is applied to a three-bay three-story frame.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Metal and Light-wight structures, KU Leuven
Contributors: Van Mellaert, R., Mela, K., Tiainen, T., Heinisuo, M., Lombaert, G., Schevenels, M.
Number of pages: 14
Pages: 3395-3408
Publication date: 2016

Host publication information

Title of host publication: ECCOMAS Congress 2016 - Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering : Crete; Greece; 5 June 2016 through 10 June 2016
Volume: 2
Publisher: National Technical University of Athens
ISBN (Electronic): 9786188284401
ASJC Scopus subject areas: Artificial Intelligence, Applied Mathematics
Keywords: Discrete optimization, Frame structures, Global optimization, Mixed-integer linear programs, Size optimization
Source: Scopus
Source ID: 84995387507

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A model based analysis of the measurement errors in inductively coupled passive resonance sensors

A lumped element model was used to predict the measurement results of an inductively coupled resonance sensor. Errors related to the inductive coupling and the reader coil self-resonance were studied. The model was compared with measurements made with a physical circuit.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Microsystems, Research area: Measurement Technology and Process Control, Integrated Technologies for Tissue Engineering Research (ITTE)
Contributors: Salpavaara, T., Lekkala, J.
Number of pages: 4
Publication date: 2015

Host publication information

Title of host publication: IMEKO XXI World Congress, Proceedings, August 30 - September 4, 2015, Prague, Czech Republic
Editor: Holub, J.
ISBN (Print): 978-80-01-05793-3
Keywords: passive resonance sensor, inductive coupling, lumped element model, measurement error

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A model for anisotropic magnetostriction

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, Lund University, Aalto University
Contributors: Belahcen, A., Kouhia, R., Rasilo, P., Ristinmaa, M.
Number of pages: 3
Pages: 201-203
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the XII Finnish Mechanics Days
Publisher: Rakenteiden Mekaniikan Seura ry
ISBN (Print): 978-952-93-5608-9
ISBN (Electronic): 978-952-93-5609-6

Bibliographical note

EXT="Rasilo, Paavo"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

A model for profiling information and knowledge management in the public sector

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial Engineering and Management, Information and Knowledge Management, Research group: Operations and Supply Chain Group (OSCG)
Contributors: Jääskeläinen, A., Sillanpää, V., Helander, N.
Publication date: 2019

Host publication information

Title of host publication: Proceedings of 14th IFKAD 2019 conference : Matera, Italy, 5-7 June.
ISBN (Electronic): 978-88-96687-12-3

Publication series

Name: Proceedings IFKAD
ISSN (Electronic): 2280-787X

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

An accurate small-signal model of a three-phase VSI-based photovoltaic inverter with LCL-filter

Three-phase photovoltaic inverters are usually equipped with an LCL-type output filter to reduce cost and size of the converter compared to a simple L-type output filter. The LCL-filter has an inherent resonance which has to be damped by a passive or active method to avoid instability. This paper presents an accurate full-order small-signal model of the three-phase VSI-based photovoltaic inverter with LCL-type output filter. The model is developed in the dq-domain, where the steady-state operating point can be solved. The developed small-signal model has been verified by extracting frequency responses from a scaled-down prototype. The model is shown to give accurate predictions on the shape of inverter transfer functions such as control loop gains and output impedance. Thus, the model can be used for control design, impedance shaping and impedance-based stability analysis.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electrical Engineering, Research area: Power engineering, Smart Energy Systems (SES)
Contributors: Aapro, A., Messo, T., Suntio, T.
Number of pages: 8
Pages: 2267-2274
Publication date: 2015

Host publication information

Title of host publication: 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)
ISBN (Print): 978-89-5708-254-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis of Cognitive Cooperative Networks with Best Relay Selection and Diversity Reception

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Wireless Communications and Positioning, Department of Telecommunications Engineering, HoChiMinh City University of Technology
Contributors: Ho-Van, K., Sofotasios, P. C., Que Son, V., Thanh Tra, L., Hong Lien, P.
Number of pages: 6
Pages: 651-656
Publication date: 2015

Host publication information

Title of host publication: 2015 International Conference on Advanced Technologies for Communications (ATC)
Publisher: IEEE
ISBN (Print): 978-1-4673-8374-5

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis of Crowdsensed WiFi Fingerprints for Indoor Localization

Crowdsensing is more and more used nowadays for indoor localization based on Received Signal Strength (RSS) fingerprinting. It is a fast and efficient solution to maintain fingerprinting databases and to keep them up-to-date. There are however several challenges involved in crowdsensing RSS fingerprinting data, and these have been little investigated so far in the current literature. Our goal is to analyse the impact of various error sources in the crowdsensing process for the purpose of indoor localization. We rely our findings on a heavy measurement campaign involving 21 measurement devices and more than 6800 fingerprints. We show that crowdsensed databases are more robust to erroneous RSS reports than to malicious fingerprint position reports. We also evaluate the positioning accuracy achievable with crowdsensed databases in the absence of any available calibration.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering, Research group: Wireless Communications and Positioning, Automation and Hydraulic Engineering, Research group: Positioning, Tampere University of Technology
Contributors: Peng, Z., Richter, P., Leppäkoski, H., Lohan, E.
Number of pages: 10
Pages: 268-277
Publication date: Nov 2017

Host publication information

Title of host publication: Proceedings of the 21st Conference of Open Innovations Association FRUCT
Place of publication: Helsinki, Finland
Publisher: FRUCT
ISBN (Electronic): 978-952-68653-2-4

Bibliographical note

INT=elt,"Peng, Zhe"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis of outdoor and indoor propagation at 15 GHz and millimeter wave frequencies in microcellular environment

The main target of this article is to perform the multidimensional analysis of multipath propagation in an indoor and outdoor environment at higher frequencies i.e. 15 GHz, 28 GHz and 60 GHz, using “sAGA” a 3D ray tracing tool. A real world outdoor Line of Sight (LOS) microcellular environment from the Yokusuka city of Japan is considered for the analysis. The simulation data acquired from the 3D ray tracing tool includes the received signal strength, power angular spectrum and the power delay profile. The different propagation mechanisms were closely analyzed. The simulation results show the difference of propagation in indoor and outdoor environment at higher frequencies and draw a special attention on the impact of diffuse scattering at 28 GHz and 60 GHz. In a simple outdoor microcellular environment with a valid LOS link between the transmitter and a receiver, the mean received signal at 28 GHz and 60 GHz was found around 5.7 dB and 13 dB inferior in comparison with signal level at 15 GHz. Whereas the difference in received signal levels at higher frequencies were further extended in an indoor environment due to higher building penetration loss. However, the propagation and penetration loss at higher frequency can be compensated by using the antenna with narrow beamwidth and larger gain.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Electrical Engineering, Research group: Laboratory of Radio Network Planning, Research group: Wireless Communications and Positioning
Contributors: Sheikh, M. U., Lempiainen, J.
Number of pages: 8
Pages: 160-167
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Advances in Science, Technology and Engineering Systems
Volume: 3
Issue number: 1
ISSN (Print): 2415-6698
Original language: English
ASJC Scopus subject areas: Engineering (miscellaneous), Management of Technology and Innovation, Physics and Astronomy (miscellaneous)
Keywords: 3D ray tracing, 5G, Microcellular, Millimeter wave frequencies, Multipath propagation, System performance
Source: Scopus
Source ID: 85061718805

Research output: Contribution to journalArticleScientificpeer-review

Analysis of Real Mobility Records in Urban and Suburban Environments

The long-term motion of vehicles and people is of great interest for many sectors of our society, such as urban planning, traffic forecasting, medicine, retail economy and public transport.

This paper analyzes the parameters of multiple mobility data sets obtained from real-field measurement campaigns. The mobility records show how the target vehicles use the street network in different geographical areas (old city center, suburban areas and highways). The records are obtained from Global Navigation Satellite System receivers mounted on the targets.

This study is useful for smart city scenarios for assessing the feasibility and the performance of metropolitan transport networks.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Wireless Communications and Positioning, Wireless Communications and Positioning (WICO), Ministry of National Education. University Politehnica of Bucharest
Contributors: Alexandru, R. C., Lohan, E.
Pages: 0688-0692
Publication date: 2016

Host publication information

Title of host publication: 26TH DAAAM International Symposium on Intelligent Manufacturing and Automation
Publisher: DAAAM International
ISBN (Print): 978-3-902734-07-5

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis of the aircraft operational reliability research series: From statistical models to avionics data monitoring

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanical Engineering and Industrial Systems, Research group: Käyttövarmuuden suunnittelu ja kunnossapito
Contributors: Laitinen, J., Niemi, A.
Number of pages: 15
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 9th World congress on engineering asset management (WCEAM 2014), Pretoria, South Africa 28-31 Oct, 2014
ISBN (Print): 978-3-319-15536-4

Bibliographical note

siirretään 2015<br/>Contribution: organisation=mei,FACT1=1<br/>Portfolio EDEND: 2015-01-14</br> publication_forum:73368

Source: researchoutputwizard
Source ID: 19

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis of upconversion nanoparticles as an active medium for upconversion light sources

In the presented work, we investigated the optical and thermal stability of upconversion nanoparticles based on the three widely used matrices (NaYF4, Y2O3, LaF3). Analysis of the upconversion emission as a function of pump power density in a wide range revealed a multi-stage functional dependence. The stages of linear growing, saturation and degradation with both reversible and irreversible characters were discovered. For matrices of nanoparticles with low-temperature stability (NaYF4), the dependence proves to be irreversible that could cause by a change in the structure and chemical composition of the matrix. Reversible dependence occurs in matrices with high-temperature stability (Y2O3 and LaF3) and is caused by multiphonon nonradiative relaxation, which can be temperature-stimulated because of self-heating and low air-cooling of the crystal matrixes with low thermal conductivity.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, Research group: Nanophotonics, A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Institute of Physics, University of Tartu
Contributors: Fedotov, A., Pominova, D., Orlovskaya, E., Orlovskii, Y., Niemi, T., Gumenyuk, R.
Number of pages: 9
Publication date: 1 Mar 2019

Host publication information

Title of host publication: Proceedings of SPIE : Optical Components and Materials XVI
Volume: 10914
Publisher: S P I E - International Society for Optical Engineering
Article number: 109140R
ISBN (Print): 9781510624702

Publication series

Name: Proceedings of SPIE : the International Society for Optical Engineering
Publisher: SPIE, The International Society for Optical Engineering
Volume: 10914
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
Keywords: upconversion, nanoparticles, luminescence, erbium, ytterbium, light sources

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis of User Exploration Patterns during Scene Cuts in Omnidirectional Videos

Omnidirectional video can be comprised of several scenes joined together. A scene in a video can change within the same semantic content due to switching to a different camera position (e.g., in a multi-camera sport event), referred to as intra-scene transition; in other situations, a scene in a video can change between different semantic content, referred to as inter-scene transition (e.g., a scene cut from a movie). — In this paper an attempt is made to 1) find the user exploration behavior in terms of the exploration range, angular speed and acceleration metrics; 2) Investigate whether there is any exploration behavioral change in the watching patterns between intra- and inter-scene transitions. — We find that there is an increase in the exploratory behavior for all the above-mentioned metrics, and show that there is a delay (reaction time) between the scene transition and the start of the exploration. Finally, we also show that the exploratory behavior is higher in inter-scene transitions compared to intra-scene transitions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Multimedia Research Group - MRG, Nokia Technologies
Contributors: Monakhov, D., Naik, D., Curcio, I. D. D., Toukomaa, H.
Number of pages: 20
Publication date: Oct 2018

Host publication information

Title of host publication: SMPTE 2018
Publisher: SMPTE
ISBN (Print): 978-1-61482-960-7
Keywords: Omnidirectional video, 360 Degrees video, Exploration range, Scene transitions, Watching patterns, Scene cuts, Viewport dependent streaming
Source: Bibtex
Source ID: urn:c98a31d3ee60d03894118df511ce8868

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Analysis on bus travel time through traffic light intersection

As the number of vehicles grows, cities around the world face serious road traffic congestion problems. One solution is the introduction of bus traffic with intelligent traffic light control. Travel time in an urban area consists of driving time and dwelling time. To analyze the effect of traffic light, data was collected from two sources: GPS bus locations and traffic light system. Travel time in an intersection depends on the arrival time on the traffic light sequence
and other traffic. The traffic light on the selected segment utilizes bus priority. Comparisons with bus priority and without were carried out. Bus priority in the intersection causes a slight decrease on travel time and removes some of the larger waiting times. Bus arrival time on the traffic light sequence is random. In this paper travel time of buses through an intersection with bus priority is analyzed.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Signal Processing, Research group: MMDM, Research area: Information Technology for Biology and Health, Research area: Intelligence in Machines, Research area: Signal and Information Processing, University of Tampere
Contributors: Kerminen, R., Wang, C., Visa, A.
Number of pages: 10
Publication date: 2015

Host publication information

Title of host publication: ITS World Congress 2015 Proceedings : Towards Intelligent Mobility – Better Use of Space
Article number: EU-ITS-2051

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

An anisotropic continuum damage model for concrete

In this paper, a thermodynamic formulation for modelling anisotropic damage of elastic brittle materials based on Ottosen's 4-parameter failure surface is proposed. The model is developed by using proper expressions for Gibb's free energy and the complementary form of the dissipation potential. The formulation predicts the basic characteristic behaviour of concrete well and results in a realistic shape for the damage surface.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, VTT Tech Res Ctr Finland, VTT Technical Research Center Finland, Aalto University
Contributors: Yaghoubi, S. T., Hartikainen, J., Kolari, K., Kouhia, R.
Number of pages: 56
Pages: 51
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the XII Finnish Mechanics Days : Suomen XII mekaniikkapäivien esitelmät
Publisher: Rakenteiden Mekaniikan Seura ry
Editors: Kouhia, R., Mäkinen, J., Pajunen, S., Saksala, T.
ISBN (Print): 978-952-93-5608-9
ISBN (Electronic): 978-952-93-5609-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

A new generation sweating thermal manikin for the evaluation of the thermal comfort of protective clothing in Arctic Conditions

Working or staying in cold conditions set high demands for the garments to
sustain the thermal comfort of the wearer. The high thermal insulation needed
in cold conditions, like in Arctic areas, can cause heat stress when working in high intensity and post exercise chill while the remaining moisture in the clothing layers due to sweating increases heat loss. The thermoregulatory properties of textiles from material level to garment level can be determined with a wide selection of test methods. Hot plates, water vapour permeability tests and a sweating thermal cylinder are used for planar textiles to determine thermal comfort properties on material level to be able to select the most suitable candidates for the garments for the required end use conditions. For garment level testing, the non-movable or movable thermal or sweating thermal
manikins offer the most sophisticated objective methods. They simulate human body heat and sweat production and body movements in controlled ambient conditions for determining the thermal comfort properties either of a piece of garment or the whole clothing systems. The effect of garment design can be determined in addition to material properties.

General information

Publication status: Published
MoE publication type: B2 Part of a book or another research book
Organisations: Department of Materials Science, Research group: Fibre Materials
Contributors: Varheenmaa, M.
Number of pages: 7
Pages: 154-161
Publication date: 2015

Host publication information

Title of host publication: Arctic Wears - Perspectives on Arctic Clothing
Publisher: Lapland University of Applied Sciences
Editors: Konola, S., Kähkönen, P.
ISBN (Print): 978-952-316-085-9
ISBN (Electronic): 978-952-316-086-6

Publication series

Name: Liiketoiminta ja yrittäjyys Sarja B. Raportit ja selvitykset 10/2015
Publisher: Lapland University of Applied Sciences

Research output: Chapter in Book/Report/Conference proceedingChapterScientific

A new method to calculate natural convection heat transfer from a non-isothermal fin array

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, Research group: Lämpö- ja virtaustekniikka
Contributors: Lampio, K., Karvinen, R.
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 7th Baltic Heat Transfer Conference, August 24-26 2015, Tallinn Estonia
Place of publication: Tallinn
Publisher: Tallinn University of Technology
Editors: Neshumayev, D., Sunden, B.
ISBN (Print): 978-9949-23-817-0

Publication series

Name: Baltic Heat Transfer Conference BHTC
Publisher: Tallinn University of Technology

Bibliographical note

ei ut-numeroa 26.4.2014<br/>Contribution: organisation=epr,FACT1=1

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A new waveguiding mechanism based upon geometric phase

We demonstrate light guiding in a locally twisted anisotropic medium in the absence of a refractive index gradient. The transverse phase modulation required to compensate diffraction is provided by the Pancharatnam-Berry phase.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research group: Nonlinear Optics, Research area: Optics, Univ Porto, Universidade do Porto, Fac Ciencias, Ctr Fis Porto, Univ Naples Federico II, Commonwealth Scientific & Industrial Research Organisation (CSIRO), University of Naples Federico II, Dipartimento Fis, Complesso Univ Monte St Angelo, Consiglio Nazionale delle Ricerche (CNR), CNR, SPIN
Contributors: Alberucci, A., Pannian, J. C., Slussarenko, S., Piccirillo, B., Santamato, E., Marrucci, L., Assanto, G.
Publication date: 2016

Host publication information

Title of host publication: Frontiers in Optics 2016
Publisher: Optical Society of America (OSA)
Article number: FF3H.3
ISBN (Print): 978-1-943580-19-4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

An example of scenario-based evaluation of military capability areas An impact assessment of alternative systems on operations

The concept of military capabilities is often used in strategic planning of defense. This study describes an example of scenario-based evaluation of military capability areas using alternative systems. The study concentrates on three capability areas: protection, awareness and engagement. Evaluations of new systems in realistic but future-oriented scenarios may reveal new possibilities to utilize collaboration of different systems or to replace existing systems with new ones. The study indicates how the combination of UAVs and satellites is the most prominent system compared to UAV or satellite systems to enhance protection, engagement and awareness capability, especially in the 10-year span. Technology development may reveal unexpected synergies in the utilization of the combination of these two systems. Further work will focus on the application of the methodology in other areas and on the collection of data to analyze the effect of the technology development to the capability areas.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: System-on-Chip for GNSS, Wireless Communications and Cyber-Physical Embedded Computing, Department of Electronics and Communications Engineering, Wireless Communications and Positioning (WICO), Information Technology Division, Finnish Defence Research Agency
Contributors: Suojanen, M., Kuikka, V., Nikkarila, J. P., Nurmi, J.
Number of pages: 7
Pages: 601-607
Publication date: 2 Jun 2015

Host publication information

Title of host publication: 9th Annual IEEE International Systems Conference, SysCon 2015 - Proceedings
Publisher: The Institute of Electrical and Electronics Engineers, Inc.
ISBN (Print): 9781479959273
ASJC Scopus subject areas: Computer Networks and Communications, Control and Systems Engineering
Keywords: impact assessment, military capability, scenario, systems, technology forecasting
Source: Scopus
Source ID: 84941308805

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

An experimental and numerical study of the dynamic Brazilian disc test on Kuru granite

This paper deals with numerical modeling of the dynamic tensile strength of Kuru granite and corresponding experiments with the dynamic Brazilian Disc (BD) tests using the Split Hopkinson Pressure Bar apparatus (SHPB). It was found that the indirect tensile strength of the Kuru granite increased from the static value of 13 MPa to 36 MPa when the impact velocity reached 20 m/s. A numerical method was developed for simulations of these tests. The method includes a material model based on the rate-dependent isotropic compliance damage and embedded discontinuity concepts for rock and an FEM based explicit time marching technique for simulating the dynamics of the SHPB apparatus. Simulation results are in decent agreement with the experiments.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Materials Science, Research group: Materials Characterization, Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics
Contributors: Mardoukhi, A., Saksala, T., Hokka, M., Kuokkala, V.
Number of pages: 6
Pages: 210-215
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the XII Finnish Mechanics Day
ISBN (Print): 978-952-93-5608-9
ISBN (Electronic): 978-952-93-5609-6
Keywords: Dynamic Brazilian Disc test, Split Hopkinson Pressure Bar, FEM, rock fracture

Bibliographical note

ORG=mol,0.5
ORG=mei,0.5

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

An Initial Homophily Indicator to Reinforce Context-Aware Semantic Computing

The vast increase of personal sensor information is driving the rise in popularity of context-aware applications. Users crave and very often expect tailored services that are based on the users’ context or personal preferences. The users themselves, using forms, often provide such information. An inference solution typically addresses this problem. In this paper, we present and show by way of a real-world example, the first step towards incorporating information of the user’s social networking behavior in the inference task. We define an initial indicator of a particular social phenomenon, called Homophily, and describe how the indicator measures the presence of homophily at certain moments, also capturing the degree to which it is present. Different from existing indicators, ours lends itself to indicating the presence of homophily in a way that is easier to comprehend, so that it may be easily integrated into and reinforce context-aware semantic computing.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mathematics, Research group: MAT Intelligent Information Systems Laboratory
Contributors: Rivero-Rodriguez, A., Pileggi, P., Nykänen, O.
Number of pages: 5
Pages: 89-93
Publication date: 2015

Host publication information

Title of host publication: 7th International Conference on Computational Intelligence, Communication Systems and Networks (CICSyN)
Place of publication: Riga
Publisher: IEEE
ISBN (Print): 9781467370165

Publication series

Name: International Conference on Computational Intelligence, Communications and Networks
Source: Mendeley
Source ID: 6f091d3c-7f8d-366f-ac71-f59b685fbff9

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A NLOS-robust TOA positioning filter based on a skew-t measurement noise model

A skew-t variational Bayes filter (STVBF) is applied to indoor positioning with time-of-arrival (TOA) based distance measurements and pedestrian dead reckoning (PDR). The proposed filter accommodates large positive outliers caused by occasional non-line-of-sight (NLOS) conditions by using a skew-t model of measurement errors. Real-data tests using the fusion of inertial sensors based PDR and ultra-wideband based TOA ranging show that the STVBF clearly outperforms the extended Kalman filter (EKF) in positioning accuracy with the computational complexity about three times that of the EKF.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research group: Positioning, Wireless Communications and Positioning (WICO)
Contributors: Nurminen, H., Ardeshiri, T., Piche, R., Gustafsson, F.
Number of pages: 7
Pages: 1-7
Publication date: 1 Oct 2015

Host publication information

Title of host publication: 2015 International Conference on Indoor Positioning and Indoor Navigation (IPIN)
Publisher: IEEE
ISBN (Print): 978-1-4673-8402-5
Keywords: Approximation methods, Computational modeling, Distance measurement, Gaussian distribution, Measurement errors, Noise measurement, Position measurement, NLOS, TOA, UWB, indoor positioning, robust filtering, skew t, skewness, variational Bayes
Electronic versions: 
Source: Bibtex
Source ID: urn:e960458d3c3e7f01508ed799f1fbe96d

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Anomaly Detection and Diagnostics of a Wheel Loader Using Dynamic Mathematical Model and Joint Probability Distributions

In this paper, we present anomaly detection and diagnostics for articulated frame steered hydraulic wheel loader. The presented methodology is based on the analysis and comparison of the responses of a dynamic mathematical model and a real wheel loader using a joint probability distribution of correlation coefficients of multiple variables. The behaviour of an undamaged machine is modelled by probability density functions of the correlation coefficients using histograms and test how well the future behaviour fits the model. First, the
time series data of multiple variables are segmented into segments of the same length. Correlation coefficients are then calculated for each segment and the distributions of the correlation coefficients are estimated by computing probability density functions using histograms. Finally, the joint probabilities that the correlations in the data segments of the time series data are observed are calculated using the already computed histograms. The diagnostics is based on the combination of static threshold and threshold based on mean value of joint probabilities. The dynamic mathematical model of the wheel loader is presented with verification results. A jammed flushing valve of the hydrostatic transmission was used as an anomaly to study the changes in the joint probability values. Finally, the efficiency of the presented method is presented
with good results regarding detection of anomalies and diagnostics of the wheel loader.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Fluid power automation in mobile machines, Research group: Field robotics and control
Contributors: Krogerus, T., Hyvönen, M., Backas, J., Huhtala, K.
Number of pages: 14
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the Fourteenth Scandinavian International Conference on Fluid Power, SICFP15. May 20-22, 2015. Tampere, Finland
Publisher: Tampere University of Technology. Department of Intelligent Hydraulics and Automation
ISBN (Electronic): 978-952-15-3530-7

Publication series

Name: The Scandinavian International Conference on Fluid Power
ISSN (Electronic): 2342-2726
Keywords: Diagnostics, Time series, Anomaly detection, Joint probability, Correlation coefficients, Simulation, Dynamic mathematical model, Wheel loader, Hydraulics
Electronic versions: 
URLs: 

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Appearance of a Drift Problem in Variable-step Perturbative MPPT Algorithms

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electrical Engineering, Research area: Power engineering
Contributors: Kivimäki, J., Suntio, T.
Number of pages: 7
Pages: 1602-1608
Publication date: 2015

Host publication information

Title of host publication: 31st European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC)
ISBN (Print): 3-936338-39-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Application and Theory of Petri Nets and Concurrency: 36th International Conference, PETRI NETS 2015 Brussels, Belgium, June 21-26, 2015 Proceedings

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Mathematics, Research group: MAT Computer Science and Applied Logics, Regulation of learning and active learning methods (REALMEE), Embedded Electronics research unit of the Bio Electro and Mechanical Systems (BEAMS) department of the Université Libre de Bruxelles
Contributors: Devillers, R. (ed.), Valmari, A. (ed.)
Publication date: 2015

Publication information

Publisher: Springer Verlag
Volume: 9115
ISBN (Print): 978-3-319-19487-5
ISBN (Electronic): 978-3-319-19488-2
Original language: English

Publication series

Name: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume: 9115
ISSN (Print): 0302-9743
ISSN (Electronic): 1611-3349
ASJC Scopus subject areas: Computer Science(all), Theoretical Computer Science

Bibliographical note

JUFOID=62555

Source: Scopus
Source ID: 84937510301

Research output: Book/ReportAnthologyScientificpeer-review

Application of terrestrial LiDAR and modelling of tree branching structure for plant- scaling models in tropical forest trees

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Mathematics, Research group: MAT Inverse Problems, Wageningen University and the UNESCO-IHE Institute for Water Education, Delft, The Netherlands, 18.10.2013
Contributors: Lau Sarmiento, A., Bartholomeus, H., Herold, M., Martius, C., Malhi, Y., Patrick Bentley, L., Shenkin, A., Raumonen, P.
Number of pages: 3
Pages: 96-98
Publication date: 2015

Host publication information

Title of host publication: Proceedings of SilviLaser 2015 : 14th conference on Lidar Applications for Assessing and Managing Forest Ecosystems

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Applying third-party moocs in programming education: a case study

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Software Engineering and Intelligent Systems, Research group: Software Engineering and Intelligent Systems, Pervasive Computing
Contributors: Saari, M., Mäkinen, T., Linna, P.
Number of pages: 7
Pages: 53-59
Publication date: 3 Jul 2017

Host publication information

Title of host publication: 9th International Conference on Education and New Learning Technologies : 3-5 July, 2017 Barcelona, Spain
Place of publication: Barcelona, Spain
Publisher: IATED
ISBN (Electronic): 978-84-697-3777-4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A Proposal of Decentralized Architecture for OKD-MES

Recent research work in the industrial automation field determines that the computational power of embedded devices, which is used for process control on the shop floor, is sufficient for handling new functionalities. Therefore, it becomes possible to manage knowledge that is encapsulated in embedded devices, demonstrating a decentralized solution for controlling processes at the lowest level of the ISA-95 automation pyramid. This chapter argues that part of the OKD-MES functionality can be lowered to the device level. Moreover, the presented chapter exhibits that OKD-MES representation and management of knowledge can be distributed and handled in the shop floor, where devices are capable of controlling processes that are later executed by machines. Hence, this chapter offers an alternative for the actual architecture of OKDMES, which is now centralized in terms of knowledge management. Furthermore, concepts, requirements and an early architecture for developing a decentralized OKD-MES are also shown and discussed

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Automation Science and Engineering, Research group: Factory automation systems technology
Contributors: Ferrer, B. R.
Number of pages: 10
Pages: 331-340
Publication date: 2015

Host publication information

Title of host publication: Open Knowledge-Driven Manufacturing & Logistics : The eScop Approach
Place of publication: Warsaw
Publisher: Warsaw University of Technology Publishing House
Editors: Strzelczak, S., Balda, P., Garetti, M., Lobov, A.
ISBN (Print): 978-83-7814-440-3

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Arbitrary Land Use Policy in Jordan between Legal Brand and Property Control

The absence of appropriate land use planning, leapfrog population growth, and high demand for urban land persist among the prevailing urban characteristics of Amman. Generally, land use policy in Jordan, and particularly in Amman remains out of control because of some social considerations and inconsistent laws.
Such phenomenon creates serious problems related to the local land market. This paper attempts to address the wide gap between land supply and demand through analysis of the relevant institutional framework, land governance, land policy and practice in Jordan. However, the historical background of land proprietorship is given parallel to the overall institutional framework of land regulation. The magnitude and reason for legal land tenure along the proposed urban corridors shall also be examined.

General information

Publication status: Published
MoE publication type: E1 Popularised article, newspaper article
Organisations: University of Jordan, Architectural department, Hashemite University, Zarqa-Jordan
Contributors: Tewfik, M., Amr, A.
Number of pages: 8
Pages: 86-93
Publication date: Dec 2014
Peer-reviewed: Unknown

Publication information

Journal: European International Journal of Science and Technology
Volume: 3
Issue number: 9
ISSN (Print): 2304-9693
Original language: English
ASJC Scopus subject areas: Urban Studies, Geography, Planning and Development, Architecture
Keywords: Urban development, regional development, timber construction, innovation network, development platform, Urban form, urban planning, urban processes

Research output: Contribution to journalArticleGeneral public

Architectural patterns for microservices: A systematic mapping study

Microservices is an architectural style increasing in popularity. However, there is still a lack of understanding how to adopt a microservice-based architectural style. We aim at characterizing different microservice architectural style patterns and the principles that guide their definition. We conducted a systematic mapping study in order to identify reported usage of microservices and based on these use cases extract common patterns and principles. We present two key contributions. Firstly, we identified several agreed microservice architecture patterns that seem widely adopted and reported in the case studies identified. Secondly, we presented these as a catalogue in a common template format including a summary of the advantages, disadvantages, and lessons learned for each pattern from the case studies. We can conclude that different architecture patterns emerge for different migration, orchestration, storage and deployment settings for a set of agreed principles.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing, Free University of Bolzano-Bozen
Contributors: Taibi, D., Lenarduzzi, V., Pahl, C.
Number of pages: 12
Pages: 221-232
Publication date: 2018

Host publication information

Title of host publication: CLOSER 2018 - Proceedings of the 8th International Conference on Cloud Computing and Services Science
Publisher: SCITEPRESS
ISBN (Electronic): 9789897582950
ASJC Scopus subject areas: Computer Science (miscellaneous), Software, Computer Science Applications
Keywords: Architectural style, Architecture pattern, Cloud migration, Cloud native, DevOps, Microservices
Source: Scopus
Source ID: 85046716130

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Architecture beyond signs and symbols : Zumthor's response to the problems of aesthetics

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: School of Architecture, Research group: History of Architecture
Contributors: Passinmäki, P.
Number of pages: 4
Pages: 325-328
Publication date: 12 May 2016
Peer-reviewed: Yes

Publication information

Journal: ARQ-Architectural Research Quarterly
Volume: 19
Issue number: 4
ISSN (Print): 1359-1355
Ratings: 
  • Scopus rating (2016): CiteScore 0.06 SJR 0.127 SNIP 0.244
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Architecture for Open, Knowledge-Driven Manufacturing Execution System

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Manufacturing and Automation, Research group: Factory automation systems technology
Contributors: Iarovyi, S., Xu, X., Lobov, A., Lastra, J. L. M., Strzelczak, S.
Number of pages: 9
Pages: 519-527
Publication date: 2015

Host publication information

Title of host publication: Advances in Production Management Systems: Innovative Production Management Towards Sustainable Growth
Publisher: Springer
ISBN (Print): 978-3-319-22759-7
Source: Bibtex
Source ID: urn:147f1b11eec705e9a04fc52893d63bac

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Are Finns walking the talk? : Examining the national collaboration process on engineering education for sustainable development five years later

In 2009, the National Collaboration Group for Finnish Engineering Education published a proposal for action on sustainable development (SD). The aim of this paper is to analyze how the three main universities providing engineering education have fulfilled their commitments. The study consists of interviews with key stakeholders supplemented with the analysis of documented material. It is argued that the studied universities are now committed to SD in their strategies. However, a lot of work remains to be done before the strategies are implemented and SD is integrated to all degree programmes. Recommendations for the next steps are presented.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Chemistry and Bioengineering, The Education Fund
Contributors: Takala, A., Korhonen-Yrjänheikki, K.
Publication date: 1 Jun 2015

Host publication information

Title of host publication: Conference on Engineering Education for Sustainable Development (7th : 2015 : Vancouver, B.C.)

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

A review study of photovoltoltaic array maximum power point tracking algorithms

There are numerous maximum power point tracking (MPPT) algorithms for improving the energy efficiency of solar photovoltaic (PV) systems. The main differences between these algorithms are digital or analog implementation, simplicity of the design, sensor requirements, convergence speed, range of effectiveness, as well as hardware costs. Therefore, choosing the right algorithm is very important to the users, because it affects the electrical efficiency of PV system and reduces the costs by decreasing the number of solar panels needed to get the desired power. This paper provides the comparison of 62 different techniques used in tracking the maximum power based on literature survey. This paper is intended to be a reference for PV systems users.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Department of Electrical Engineering, Research area: Power engineering, Islamic University of Gaza
Contributors: El-Khozondar, H., El-Khozondar, R., Matter, K., Suntio, T.
Number of pages: 8
Publication date: 18 Feb 2016
Peer-reviewed: Yes

Publication information

Journal: Renewables: Wind, Water, and Solar
Volume: 3
Issue number: 1
ISSN (Print): 2198-994X
Original language: English

Research output: Contribution to journalReview ArticleScientificpeer-review

Arkinen liikkuminen kontekstina kaupunkitilan tarkasteluun

General information

Publication status: Published
Organisations: School of Architecture
Contributors: Tartia, J.
Publication date: 2015
Peer-reviewed: No

Publication information

Journal: Versus
ISSN (Print): 2242-3443
Original language: Finnish

Research output: Contribution to journalSpecial issueScientific

A Semantic Meta-Model Repository for Lightweight M2M

One of the biggest problems in managing devices for the Internet of Things (IoT) is the ability for a management server to independently discover and retrieve data models for vendor-specific devices. At the same time, several device management methods also lack methods for device vendors to share their data models in a consistent manner. This paper presents the design and implementation of a repository that can flexibly accommodate many needs with regards to these issues, and allows device vendors to publish semantically similar data models as well as attach meta-data to these models. A Machine-to-Machine (M2M) communication interface also allows a management server to communicate with the repository. We show how these techniques can be used with the Lightweight Machine-to-Machine (LWM2M) standard.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, Research area: Information security, Ericsson
Contributors: Silverajan, B., Zhao, H., Kamath, A.
Number of pages: 5
Pages: 468-472
Publication date: 11 Apr 2019

Host publication information

Title of host publication: 2018 IEEE International Conference on Communication Systems, ICCS 2018
Publisher: IEEE
ISBN (Electronic): 9781538678640
ASJC Scopus subject areas: Computer Networks and Communications, Hardware and Architecture, Information Systems and Management, Aerospace Engineering
Keywords: data model repository, IoT device management, LWM2M
Source: Scopus
Source ID: 85065038511

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A social capital perspective on gaining optimal solutions from suppliers as preferred customer

Capable suppliers willing to provide their best possible offering are increasingly scarce. Such suppliers increasingly select customers to whom they invest their best resources and provide the best offerings. The existing research has paid only limited attention to the antecedents of supplier’s solution provision performance, i.e. the design of a good solution and its implementation. Further, existing empirical research has rarely taken a detailed view on the phases of a supplier’s solution provision. This study seeks answers to the following questions: can the availability or absence of social capital in the supplier-buyer relationship explain supplier’s solution provision performance?, what is the importance of different forms of social capital in supplier’s solution provision performance and the different phases of solution provision? The empirical data of this study is collected with a survey addressed to suppliers of four large companies. The survey is sent to 1630 supplier companies and 662 usable responses are received resulting in a response rate of 41%. Partial least squares (PLS) structural equation modelling (SEM) and polynomial regression are used to analyze the data. The results demonstrate the importance of social capital in obtaining the optimal solution from suppliers. The results also present that different types of social capital have different influence on the phases of solution provision. Diagnosis of customer needs appears as the phase most significantly driven by social capital prevalent in the supplier-buyer relationship. The results also show that different forms of social capital can compensate each other and that structural capital can take a stronger role compared to relational capital.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, University of Twente
Contributors: Jääskeläinen, A., Schiele, H., Aarikka-Stenroos, L.
Publication date: 2018

Host publication information

Title of host publication: Academy of Management Proceedings
Volume: 2018
Publisher: Academy of Management AOM
Edition: 1

Publication series

Name: Academy of Management Proceedings
Volume: 2018
No.: 1
ISSN (Print): 0065-0668
ISSN (Electronic): 2151-6561

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A Socially-Intelligent Multi-Robot Service Team for In-Home Monitoring

The objective of this study is to develop a socially-intelligent service team comprised of multiple robots with sophisticated sonic interaction capabilities that aims to transparently collaborate towards efficient and robust monitoring by close interaction. In the distributed scenario proposed in this study, the robots share any acoustic data extracted from the environment and act in-sync with the events occurring in their living environment in order to provide potential means for efficient monitoring and decision-making within a typical home enclosure. Although each robot acts as an individual recognizer using a novel emotionally-enriched word recognition system, the final decision is social in nature and is followed by all. Moreover, the social decision stage triggers actions that are algorithmically distributed among the robots' population and enhances the overall approach with the potential advantages of the team work within specific communities through collaboration.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Technological Educational Institute of Piraeus, Trakya University, Ionian University
Contributors: Drossos, K., Floros, A., Potirakis, S., Tatlas, N., Tuna, G.
Pages: 159-164
Publication date: Jul 2014

Host publication information

Title of host publication:  Information, Intelligence, Systems and Applications, IISA 2014, The 5th International Conference on
Publisher: IEEE
ISBN (Print): 978-1-4799-6171-9
ISBN (Electronic): 978-1-4799-6170-2

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Assessing business learning by analysing ERP simulation log files

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics, Research group: Novi
Contributors: Nisula, K., Pekkola, S.
Publication date: 10 Dec 2016

Host publication information

Title of host publication: AIS SIGED 2016 Conference on IS education and Research. : Dublin, Ireland, December 10-11, 2016
Place of publication: Dublin
ISBN (Print): 978-0-692-81119-1

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Assessing coupling dynamics from an ensemble of time series

Finding interdependency relations between time series provides valuable knowledge about the processes that generated the signals. Information theory sets a natural framework for important classes of statistical dependencies. However, a reliable estimation from information-theoretic functionals is hampered when the dependency to be assessed is brief or evolves in time. Here, we show that these limitations can be partly alleviated when we have access to an ensemble of independent repetitions of the time series. In particular, we gear a data-efficient estimator of probability densities to make use of the full structure of trial-based measures. By doing so, we can obtain time-resolved estimates for a family of entropy combinations (including mutual information, transfer entropy and their conditional counterparts), which are more accurate than the simple average of individual estimates over trials. We show with simulated and real data generated by coupled electronic circuits that the proposed approach allows one to recover the time-resolved dynamics of the coupling between different subsystems.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Mathematics, University of Electronic Science and Technology of China, Institute of Computer Science (ICS) of the Foundation for Research and Technology - Hellas (FORTH), Lab of Neurophysics and Neurophysiology, Hefei National Laboratory for Physical Sciences at the Microscale, Instituto de Fisica Interdisciplinar y Sistemas Complejos (CSIC-UIB), Campus Universitat de les Illes Balears, Institut für Kognitionswissenschaft, University of Osnabrück, University of Tartu, Netherlands Institute for Neuroscience
Contributors: Gómez-Herrero, G., Wu, W., Rutanen, K., Soriano, M. C., Pipa, G., Vicente, R.
Number of pages: 13
Pages: 1958-1970
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Entropy
Volume: 17
Issue number: 4
ISSN (Print): 1099-4300
Ratings: 
  • Scopus rating (2015): CiteScore 1.99 SJR 0.551 SNIP 1.116
Original language: English
ASJC Scopus subject areas: Physics and Astronomy(all)
Keywords: Ensemble, Entropy, Estimator, Time series, Transfer entropy, Trial

Bibliographical note

EXT="Gómez-Herrero,Germán"

Source: Scopus
Source ID: 84930319366

Research output: Contribution to journalArticleScientificpeer-review

Assessing the usefulness of an early idea development tool among experienced researchers

We test a novel ideation tool developed for early idea development among experienced academic researchers. We presented the
Impact Canvas® tool to experienced researchers who assessed the usefulness of the tool in early idea development. This paper analyses
their perceptions of the tool: its usability and visual appeal, content elements, ability to facilitate collaboration and motivate them
personally. Our findings imply that the employment background of experienced researchers has an impact on how useful they consider
the tool. Researchers with a background in the public sector appreciate the tool significantly more than researchers who do not have
similar working experiences.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Industrial and Information Management, Research group: Center for Innovation and Technology Research, Innovation Services, Research Services, University of Tampere
Contributors: Saari, U., Aarikka-Stenroos, L., Boedeker, S., Köppä, L., Langwaldt, J.
Number of pages: 6
Pages: 3-8
Publication date: 22 Dec 2017
Peer-reviewed: Yes

Publication information

Journal: CERN IdeaSquare Journal of Experimental Innovation
Volume: 1
Issue number: 2
ISSN (Print): 2413-9505
Original language: English
Keywords: Canvas tool, Early idea development, Ideation process, Ideation tool
Electronic versions: 

Research output: Contribution to journalArticleScientificpeer-review

Assessment of student retention using the Evolute approach, an overview

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department
Contributors: Einolander, J., Vanharanta, H.
Number of pages: 6
Pages: 581–586
Publication date: 2015

Host publication information

Title of host publication: 6th International Conference on Applied Human Factors and Ergonomics (AHFE 2015) and the Affiliated Conferences, AHFE 2015
Publisher: Elsevier

Publication series

Name: Procedia Manufacturing
Volume: 3
ISSN (Print): 2351-9789

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A study of a condensing heat exchanger and electrostatic precipitator combination for small-scale wood combustion

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Physics, Research area: Aerosol Physics, Research area: Optics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group
Contributors: Grigonyte, J., Sippula, O., Tissari, J., Laitinen, A., Keskinen, J., Kortelainen, M., Lamberg, H., Jokiniemi, J.
Publication date: 2015

Host publication information

Title of host publication: European Aerosol Conference 2015 : EAC 2015, Milan, Italy
Article number: 2COA_P021

Bibliographical note

ISBN kysytty, HO.

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

A study on the behaviour of the weathered crust in the Perniö failure test

A full-scale embankment failure test was done in Finland in 2009 in Perniö. The test was conducted in order to gather data to
enhance stability calculation methods on soft soils in railway environment. A shallow embankment with loading structure was built on top
of an existing fill layer over a stiff and overconsolidated clay crust followed by a soft sensitive clay layer and brought to failure in two
days. The soft clay has been thoroughly studied and modeled over the last years based on high quality laboratory and field tests as well as
measurements from the experiment. In this paper, the effect of the weathered clay crust on the stability of the embankment is studied. Ac-
cording to La Rochelle (1974), the field vane tends to overestimate the undrained shear strength of the dry crust since measurements are
affected by uncertainties due to soil structure and test conditions. For this reason a parametric study on stiffness and strength parameters of
Perniö dry crust is done through comparison of experimental data with predictions from finite element method. In particular, three differ-
ent models are used in this study: the isotropic Mohr-Coulomb and Hardening Soil model and the anisotropic NGI-ADP model. The anal-
ysis is carried out with PLAXIS 2D. Finally, FE analysis of the Perniö failure test is done using different soil models and the failure load
is predicted. Results are discussed in order to evaluate the most suitable model for the realistic prediction of undrained behaviour of Perniö
weathered crust.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Foundation Structures, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: D'Ignazio, M., Di Buo, B., Länsivaara, T.
Number of pages: 6
Pages: 3639-3644
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the XVI ECSMGE 2015 : 13-17 September 2015 - Edinburgh, Geotechnical Engineering for Infrastructure and Development
Publisher: ICE Publishing
ISBN (Print): 9780727760678

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Asuinhuoneistojen betonivälipohjien askelääneneristyksen subjektiivinen ja objektiivinen arviointi

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Acoustics, Finnish Institute of Occupational Health
Contributors: Kylliäinen, M., Oliva, D., Rekola, L., Hongisto, V.
Number of pages: 4
Pages: 204-207
Publication date: 1 Sep 2015

Host publication information

Title of host publication: Akustiikkapäivät 2015
Place of publication: Kuopio
Publisher: Akustinen seura

Publication series

Name: Akustiikkapäivät
ISSN (Print): 1236-8202
ASJC Scopus subject areas: Acoustics and Ultrasonics

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

A Survey of People Movement Analytics Studies in the Context of Smart Cities

With the advent of the newest emergency call mandates in US and Europe, with the advances in cellular-based and WiFi-based localization solutions, and with the developments of cloud computing and web-based social networks, the location information and movement-related data is becoming easier and easier to collect from the user mobile devices and from the user cloud data and it is more and more used in a variety of Location Based Services and for various network planning and management tasks. The last decade has seen significant research efforts dedicated to analyze the user location and movement data, to extract mobility patterns and features and to use the predicted patterns for a more efficient resource allocation and for better location-based services. In the context of what is called today ’the smart city’, user mobility and location data are becoming key components of the smart city architecture and applications. The goal of this paper is to give a compact and comprehensive overview of the challenges and solutions related to collecting, storing, analyzing, visualizing, using or distributing people’s movement data and to summarize the purposes of such data in the context of the smart cities and the Internet of Things

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Wireless Communications and Positioning, Aalto University, Tampere University of Technology, Department of Electronics and Communications Engineering, Laboratory for Future Electronics
Contributors: Lohan, E., Kauppinen, T., Debnath, S. B. C.
Pages: 151-158
Publication date: 10 Nov 2016

Host publication information

Title of host publication: Proceedings of the FRUCT’19
ISBN (Electronic): 978-952-68397-5-2

Bibliographical note

INT=elt,"Debnath, Sree Bash Chandra"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A trial of yoking-proof protocol in RFID-based smart-home environment

Owing to significant progress in the Internet of Things (IoT) within both academia and industry, this breakthrough technology is increasingly penetrating our everyday lives. However, the levels of user adoption and business revenue are still lagging behind the original expectations. The reasons include strong security and privacy concerns behind the IoT, which become critically important in the smart home environment. Our envisioned smart home scenario comprises a variety of sensors, actuators, and end-user devices interacting and sharing data securely. Correspondingly, we aim at investigating and verifying in practice the Yoking-proof protocol, which is a multi-factor authentication solution for smart home systems with an emphasis on data confidentiality and mutual authentication. Our international team conducted a large trial featuring the Yoking-proof protocol, RFID technology, as well as various sensors and user terminals. This paper outlines the essentials of this trial, reports on our practical experience, and summarizes the main lessons learned.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Emerging Technologies for Nano-Bio-Info-Cogno, Electronics and Communications Engineering, St. Petersburg State University of Aerospace Instrumentation, Brno University of Technology
Contributors: Prudanov, A., Tkachev, S., Golos, N., Masek, P., Hosek, J., Fujdiak, R., Zeman, K., Ometov, A., Bezzateev, S., Voloshina, N., Andreev, S., Misurec, J.
Number of pages: 10
Pages: 25-34
Publication date: 2016

Host publication information

Title of host publication: Distributed Computer and Communication Networks - 19th International Conference, DCCN 2016, Revised Selected Papers
Volume: 678
Publisher: Springer Verlag
ISBN (Print): 9783319519166

Publication series

Name: Communications in Computer and Information Science
Volume: 678
ISSN (Print): 1865-0929
ASJC Scopus subject areas: Computer Science(all)
Keywords: Authentication, IoT, RFID, Smart-Home, Yoking-proof protocol
Source: Scopus
Source ID: 85013436263

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Augmenting Technology Trees: Automation and Tool Support

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mathematics, Research group: MAT Computer Science and Applied Logics
Contributors: Heinimäki, T. J., Elomaa, T.
Number of pages: 8
Pages: 68-75
Publication date: Sep 2015

Host publication information

Title of host publication: Proceedings of the Seventh International Conference on Virtual Worlds and Games for Serious Applications (VS-Games 2015)
Publisher: IEEE
ISBN (Print): 978-1-4799-8101-4
ISBN (Electronic): 978-1-4799-8102-1
ASJC Scopus subject areas: Software

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A unified lcf-hcf model based on continuum mechanics

In this work, a unified low- and high-cycle fatigue model based on continuum
mechanics is developed. The high-cycle part of the model is based on the concepts of a moving endurance surface in the stress space with an associated evolving isotropic damage variable. The low-cycle part of the model is formulated as a traditional nonlinear isotropic and kinematic hardening J2-plasticity model. The LCF- and HCF-models are connected via the damage evolution equation. Performace of the model is demonstrated with a numerical example.

General information

Publication status: Published
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, Department of Civil Engineering, Lund University
Contributors: Kouhia, R., Holopainen, S., Ottosen, N. S., Matti, R., Saksala, T.
Number of pages: 4
Publication date: 2016
Peer-reviewed: Unknown
Event: Paper presented at Nordic Seminar on Computational Mechanics, .

Research output: Other conference contributionPaper, poster or abstractScientific

Automated driving and the key megatrends of future

Road transport is facing several changes that derive from the operational environment. Technological
progress supporting advances in automated driving is one of these. Alongside e.g. globalisation,
urbanisation, aging, climate change and digitalisation are challenging the transport needs and solutions
of today. This paper discusses how automated driving is related to the factors of change. Based on the
analysis, the progress towards more automated driving is supporting and is supported by the changes
deriving from the key megatrends even though also some conflicting issues are recognised.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Information Management and Logistics
Contributors: Pöllänen, M., Nykänen, L.
Publication date: 2014

Host publication information

Title of host publication: ITS European Congress : 10th ITS EUROPEAN CONGRESS, Helsinki, Finland 16-19 June 2014
Article number: TP0067
ASJC Scopus subject areas: Engineering(all)
Keywords: automated driving, megatrends, FUTURE-RESEARCH

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Automated pile transfer work cycles with a robotic wheel loader

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Automation and Hydraulic Engineering, Research group: Robotics and Automation, Research group: Innovative Hydraulic Automation
Contributors: Halbach, E., Kolu, A., Ghabcheloo, R.
Number of pages: 8
Publication date: 2018

Host publication information

Title of host publication: 17th International Conference on Computing in Civil and Building Engineering (ICCCBE) : Tampere, 5-7 June 2018
Place of publication: Tampere, Finland
Publisher: RIL
Editors: Mela, K., Pajunen, S., Raasakka, V.
ISBN (Electronic): 978-951-758-632-0

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Automated Tonal Balance Enhancement for Audio Mastering Applications

Modern audio mastering procedures are involved with the selective enhancement or attenuation of specific frequency bands. The main reason is the tonal enhancement of the original / unmastered audio material. The aforementioned process is mostly based on the musical information and the mode of the audio material. This information can be retrieved from a listening procedure of the original stimuli, or the correspondent musical key notes. The current work presents an adaptive and automated equalization system that performs the aforementioned mastering procedure, based on a novel method of fundamental frequency tracking. In addition to this, the overall system is being evaluated with objective PEAQ analysis and subjective listening tests in real mastering audio conditions.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Signal Processing Research Community (SPRC), Technological Educational Institute of Ionian Islands, Ionian University
Contributors: Mimilakis, S. -. I., Drossos, K., Floros, A., Katerelos, D.
Number of pages: 7
Publication date: May 2013

Host publication information

Title of host publication: Audio Engineering Society Convention 134
Publisher: AES Audio Engineering Society

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Automatic Classification of Z-ring Formation Stages at the Single Cell Level in Escherichia Coli by Machine Learning

In E. coli, Z-ring formation precedes the assembly of the membrane that partitions a cell into two daughter cells. Initially, as FtsZ proteins are expressed, they preferentially locate at the poles. After, they form a ring at midcell, in between the nucleoids, 'marking' where a constriction will form. Finally, the ring becomes a circle, where the septum separating the daughter cells forms. Being the temporal-spatial organization of FtsZ noisy, differing between cells in timing and location, its study requires observing many cells by time-lapse microscopy. To assist, image and signal processing methods are needed to extract information unbiasedly from many cells. Also, one needs automatic identification of the ring formation stage in individual cells. Here we used three classification methods to identify the stage of ring formation from microscopy images: Decision Tree (DT), Support Vector Machine (SVM), and Regularized Multinomial Logistic regression (RMLR). We find that RMLR performs better (higher 10-fold cross-validated accuracy, ACC). Our study will assist future studies at the single cell level of the spatio-temporal dynamics of cell division in E. coli.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Research group: Laboratory of Biosystem Dynamics-LBD, Signal Processing, BioMediTech, Universidade Nova de Lisboa, Aalto Univ, Aalto University, Dept Signal Proc & Acoust
Contributors: Zare, M., Neeli-Venkata, R., Martins, L., Peltonen, S., Ruotsalainen, U., Ribeiro, A. S.
Number of pages: 5
Pages: 72-76
Publication date: 2017

Host publication information

Title of host publication: Proceedings of the 10th International Joint Conference on Biomedical Engineering Systems and Technologies, Vol 2: Bioimaging
Publisher: SCITEPRESS
Editors: Silveira, M., Fred, A., Gamboa, H., Vaz, M.
ISBN (Electronic): 978-989-758-215-8
Keywords: Z-ring Formation, Stages, Time-lapse Microscopy, Classification Methods, DIVISION SITES, PROTEINS FTSZ, LOCALIZATION, SEGREGATION, DYNAMICS
Source: WOS
Source ID: 000413260200008

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Automatization and stress analysis data of CoCr laser weld fatigue tests

This work includes raw and analyzed test data when using a recently developed fatigue test method for miniature laser welds in cobalt-chromium (CoCr) alloy joints [1]: 10.1016/j.jmbbm.2019.07.004. The automization of fatigue tests is crucial for saving costs and personnel resources and that is the reason why the atomization threshold and the resulting spectrum data related to CoCr welds are provided here. The finite element method based stress computation output is provided related to shearing-mode tests to support the dataset as a whole. In addition, the compositional data of the parent material and the laser weld are given.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Plastics and Elastomer Technology, Orton Orthopaedic Hospital, Surface and Corrosion Science
Contributors: Kanerva, M., Besharat, Z., Pärnänen, T., Jokinen, J., Honkanen, M., Sarlin, E., Göthelid, M., Schlenzka, D.
Publication date: 1 Oct 2019
Peer-reviewed: Yes

Publication information

Journal: Data in Brief
Volume: 26
Article number: 104374
ISSN (Print): 2352-3409
Original language: English
ASJC Scopus subject areas: General
Keywords: Automatization, CoCr, Fatigue, Laser, Testing, Welding

Bibliographical note

EXT="Pärnänen, T."

Source: Scopus
Source ID: 85072173471

Research output: Contribution to journalArticleScientificpeer-review

A Variable Battery Supply DC-DC Buck Converter Designed for 45nm-CMOS Technology

In this paper, a buck DC-DC converter is presented that is capable of operation under variable input battery voltage ranging from 3.5V to 6V. The proposed converter is based on a new design technique using an adaptive biasing circuit for cascode power stage. The biasing circuit changes its configuration when the battery voltage drops down to 4.5V. The converter is implemented in 45-nm CMOS technology; it was simulated and its operation was verified at an output power of 200mW where it achieves a maximum power conversion efficiency of 81% for an output voltage of 1.25V.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: RF Integrated Circuits, Univ Alberta, University of Alberta, Tampere Univ Technol, Tampere University of Technology
Contributors: Fouladi, A., Järvenhaara, J., Filanovsky, I. M., Tchamov, N. T.
Publication date: 15 May 2016

Host publication information

Title of host publication: 2016 IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Vancouver, May 15-18, 2016.
ISBN (Electronic): 978-1-4673-8721-7

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Back-calculation of the Saint-Alban A test embankment with a new modelling approach in LEM

To facilitate the continued use of limit equilibrium method (LEM) in stability design of embankments on soft clays, the new calculation method “Hybrid su” (HSU) has been developed. It is used to derive undrained shear strength from effective strength parameters, or to predict the excess pore pressure at failure. The HSU method uses an anisotropic effective stress soil model with volumetric hardening, from which a closed form solution for the effective mean stress at failure p’f is derived. This in turn is used to derive the anisotropic undrained shear strength (for use in total stress analyses), or excess pore pressure (for use in undrained effective stress analyses). The model accounts for factors such as anisotropy, consolidation state, volumetric hardening and to some extent, rate effects. An advantage of the model over traditional undrained effective stress calculations is that the overestimation of shear strength at F > 1 is avoided.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Foundation Structures
Contributors: Lehtonen, V., Länsivaara, T.
Number of pages: 9
Pages: 691-699
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the The 17th Nordic Geotechnical Meeting, Reykjavik Iceland : 25th - 28th of May 2016
ISBN (Electronic): 978-9935-24-002-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Backend infrastructure supporting audio augmented reality and storytelling

Today, museums are looking for new ways to attract and engage audience. These include virtual exhibitions, augmented reality and 3D modelling based applications, and interactive digital storytelling. The target of all these activities is to provide better experiences for audiences that are very familiar with the digital world. In augmented reality (AR) and interactive digital storytelling (IDS) systems, visual presentation has been dominant. In contrast to this trend, we have chosen to concentrate on auditory presentation. A key element for this is a backend service supporting different client applications. This paper discusses our experiences from designing a portable open source based audio digital asset management system (ADAM), which supports interaction with smart phones and tablets containing audio augmented reality and audio story applications. We have successfully implemented ADAM system and evaluated it in the Museum of Technology in Helsinki, Finland.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: Software engineering, Helsinki Metropolia University of Applied Sciences
Contributors: Salo, K., Giova, D., Mikkonen, T.
Number of pages: 11
Pages: 325-335
Publication date: 2016

Host publication information

Title of host publication: Human Interface and the Management of Information: Applications and Services : 18th International Conference, HCI International 2016 Toronto, Canada, July 17-22, 2016. Proceedings, Part II
Publisher: Springer Verlag
ISBN (Print): 9783319403960

Publication series

Name: Lecture Notes in Computer Science
Volume: 9735
ISSN (Print): 0302-9743
ISSN (Electronic): 1611-3349
ASJC Scopus subject areas: Computer Science(all), Theoretical Computer Science
Keywords: Audio augmented reality, Digital asset management, Metadata, Open source DAM, Soundscape
Source: Scopus
Source ID: 84978903908

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Background-Free Second-Harmonic Generation Microscopy of Individual Carbon Nanotubes

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Physics, Research area: Optics, Research group: Nonlinear Optics, Frontier Photonics, Department of Applied Physics and Nanomicroscopy Center, Aalto University, Univ Jyvaskyla, University of Jyvaskyla, Dept Chem, Nanosci Ctr
Contributors: Bautista, G. S., Johansson, A., Parappurath, N., Herranen, O., Myllyperkiö, P., Jiang, H., Kauppinen, E., Pettersson, M., Kauranen, M.
Number of pages: 2
Publication date: 2015

Host publication information

Title of host publication: Nonlinear Optics 2015 : Kauai, Hawaii United States 26–31 July 2015
Publisher: OSA
Article number: NW1A.5
ISBN (Print): 978-1-55752-001-2

Publication series

Name: Nonlinear Optics Conference Series

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Balancing Expectations to the Health Software Production Process Standard

This paper presents the stakeholder expectations to the new version of the ISO/IEC health software life cycle standard 62304. This software production standard is central to the medical device industry but the new version is expected to cover even more scope including also other health software than just regulated medical device software. This paper discusses how to balance the expectations of the law makers, regulatory bodies, software producers and users etc. Compared to the present version the new version should take more into account the special characteristics of developing low risk mobile health application software and cybersecurity while maintaining the endorsement of the regulatory bodies.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Sleep and Sensory Signal Analysis Group-SSSAG
Contributors: Värri, A.
Publication date: 2015

Host publication information

Title of host publication: The 3rd International Virtual Research Conference In Technical Disciplines
ISBN (Print): 978-80-554-1125-5

Publication series

Name: RCITD - Proceedings in Research Conference in Technical Disciplines
ISSN (Print): 2453-6571
ISSN (Electronic): 1339-5076

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Barkhausen noise Potcore sensor simulations with Comsol

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Research group: Materials Characterization, Materials Science, Stresstech Oy
Contributors: Laitinen, A., Santa-aho, S., Lukinmaa, H., Suominen, L., Vippola, M.
Number of pages: 11
Pages: 97-107
Publication date: 24 Sep 2017

Host publication information

Title of host publication: 12th International Conference on Barkhausen Noise and Micromagnetic Testing
Publisher: ICBM
ISBN (Print): 978-952-68852-0-9
Keywords: Barkhausen noise

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Beaconing in a highway scenario: Vulnerable vehicles problem

Periodic exchange of short status messages using IEEE 802.11p also referred to as beaconing is a core inter-vehicle communication mode enabling novel cooperative safety applications. A beaconing in the platoon of vehicles moving on a highway is studied as one of the popular practical scenarios. This paper demonstrates that when the inter-arrival times of beacons are small and under certain medium access control protocol parameters, some vehicles in the platoon may suffer from serious performance degradation. The condition when such situation takes place is studied and recommendations are given on a proper choice of IEEE 802.11p parameters.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering
Contributors: Tariq, A. B.
Number of pages: 7
Pages: 169-175
Publication date: 2012

Host publication information

Title of host publication: Proceedings of the 11th Conference of Open Innovations Association FRUCT, FRUCT 2012
Volume: 2012-April
Publisher: IEEE
ISBN (Electronic): 9785808807075
ASJC Scopus subject areas: Computer Science(all), Electrical and Electronic Engineering
Keywords: Beaconing, Hidden-nodes, IEEE 802.11p, Terms, VANET

Bibliographical note

INT=elt"Tariq, Ali Bin"

Source: Scopus
Source ID: 85044729916

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

BEADS: A dataset of Binaural Emotionally Annotated Digital Sounds

Emotion recognition from generalized sounds is an interdisciplinary and emerging field of research. A vital requirement for this kind of investigations is the availability of ground truth datasets. Currently, there are 2 freely available datasets of emotionally annotated sounds, which, however, do not include sound evenets (SEs) with manifestation of the spatial location of the source. The latter is an inherent natural component of SEs, since all sound sources in real-world conditions are physically located and perceived somewhere in the listener's surrounding space. In this work we present a novel emotionally annotated sounds dataset consisting of 32 SEs that are spatially rendered using appropriate binaural processing. All SEs in the dataset are available in 5 spatial positions corresponding to source/receiver angles equal to 0, 45, 90, 135 and 180 degrees. We have used the IADS dataset as the initial collection of SEs prior to binaural processing. The annotation measures obtained for the novel binaural dataset demonstrate a significant accordance with the existing IADS dataset, while small ratings declinations illustrate a perceptual adaptation imposed by the more realistic SEs spatial representation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Ionian University
Contributors: Drossos, K., Floros, A., Giannakoulopoulos, A.
Number of pages: 6
Pages: 158-163
Publication date: 1 Jul 2014

Host publication information

Title of host publication: Information, Intelligence, Systems and Applications, IISA 2014, The 5th International Conference on
Publisher: IEEE
ISBN (Electronic): 978-1-4799-6171-9
Keywords: emotion recognition, music, BEADS, IADS dataset, SEs spatial representation, binaural dataset, binaural emotionally annotated digital sounds, binaural processing, emotionally annotated sound dataset, ground truth datasets, music signals, sound evenets, Acoustics, Art, Databases, Electronic mail, Emotion recognition, Headphones, Semantics
Source: Bibtex
Source ID: urn:b4c1c66c90ee0f9dcdb6a6f156c1bf7e

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Being a start-upper in Italy: Motivations, obstacles and success factors

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations, Department of Information Management and Logistics, Research group: Novi, Managing digital industrial transformation (mDIT), University of Calabria
Contributors: Michele Felicetti, A., Ammirato, S., Raso, C., Aramo-Immonen, H., Jussila, J.
Number of pages: 14
Pages: 1370-1383
Publication date: 15 Jun 2016

Host publication information

Title of host publication: Proceedings of the 11th forum on knowledge asset dynamics : Towards a new architecture of knowledge: big data, culture and creativity
Place of publication: Dresden
Article number: 182
ISBN (Electronic): 978-88-96687-09-3
Keywords: Start-up

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Benchmarking of Factory Level ESD Control

A standard compliance of the factory level ESD control varies between organizations. We have audited twelve different factories during the 24-month benchmarking period. These audits were focused on the ESD control programs and the process control. The summary of results and examples of the best practices are presented in this paper.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, ABB Oy, Drives, Nokia Corporation, Cascade Metrology
Contributors: Viheriäkoski, T., Kohtamäki, J., Peltoniemi, T., Tamminen, P.
Number of pages: 7
Publication date: 27 Sep 2015

Host publication information

Title of host publication: Electrical Overstress/Electrostatic Discharge Symposium Proceedings 2015
Volume: 2015
Place of publication: USA
Publisher: IEEE COMPUTER SOC
Article number: 6B.1
ISBN (Print): 9781479988952
ASJC Scopus subject areas: Engineering(all)
Keywords: Surface Resistivity, dissipative material, measurement
Electronic versions: 

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Benchmarking of several disparity estimation algorithms for light field processing

A number of high-quality depth imaged-based rendering (DIBR) pipelines have been developed to reconstruct a 3D scene from several images taken from known camera viewpoints. Due to the specific limitations of each technique, their output is prone to artifacts. Therefore, the quality cannot be ensured. To improve the quality of the most critical and challenging image areas, an exhaustive comparison is required. In this paper, we consider three questions of benchmarking the quality performance of eight DIBR techniques on light fields: First, how does the density of original input views affect the quality of the rendered novel views? Second, how does disparity range between adjacent input views impact the quality? Third, how does each technique behave for different object properties? We compared and evaluated the results visually as well as quantitatively (PSNR, SSIM, AD, and VDP2). The results show some techniques outperform others in different disparity ranges. The results also indicate using more views not necessarily results in visually higher quality for all critical image areas. Finally, we have shown a comparison for different scene's complexity such as non-Lambertian objects.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, Moving Picture Technologies
Contributors: Zakeri, F. S., Bätz, M., Jaschke, T., Keinert, J., Chuchvara, A.
Publication date: 2019

Host publication information

Title of host publication: Fourteenth International Conference on Quality Control by Artificial Vision
Publisher: SPIE, IEEE
Editors: Bazeille, S., Verrier, N., Cudel, C.
Article number: 111721C
ISBN (Electronic): 9781510630536

Publication series

Name: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 11172
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Keywords: Depth image-based rendering, Disparity estimation, Quality evaluation

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85070208910

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Benefits of digitally guided buying in B2B markets

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Research group: Cost Management Center
Contributors: Ojala, M., Mahlamäki, T.
Publication date: 2016

Host publication information

Title of host publication: 25th annual IPSERA Conference : Dortmund, Sunday 20 March - Wednesday 23 March 2016
Place of publication: Dortmund

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Betonin kosteusteknisten materiaaliominaisuuksien määrittäminen

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Laboratory of Civil Engineering
Contributors: Vänttinen, K., Tuominen, E., Vinha, J.
Number of pages: 10
Pages: 461-470
Publication date: 24 Oct 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24.-26.10.2017, Tampere
Volume: 2
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4023-3

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.

Bibliographical note

INT=RAK, "Vänttinen, Kari"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Beyond ic 4.0 : the future potential of bi-tool utilization in the private healthcare

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Information and Knowledge Management, Research group: Business Data Research Group
Contributors: Ratia, M., Myllärniemi, J.
Publication date: 2018

Host publication information

Title of host publication: 13th International Forum on Knowledge Asset Dynamics, IFKAD 2018 : Delft, Netherlands, 4-6 July 2018
ISBN (Electronic): 978-88-96687-11-6

Publication series

Name: Proceedings IFKAD
ISSN (Electronic): 2280-787X

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Bioimpedance measurement system for evaluation of the status of wound healing

Hard-to-heal wounds are usually evaluated visually by a medical professional. Visual inspection as a method is subjective and in order to evaluate the wound the dressings have to be removed. Our group has developed a wound patch, a bioimpedance device and a PC software for mapping the wound area and to evaluate the status of wound healing. This study introduces the patch and the measurement system. We also present the test measurement results obtained using an early version of the wound patch. The results confirmed that the patch can be used for the evaluation of the wound status.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Personal Electronics Group, Research group: Physiological Measurement Systems and Methods Group, BioMediTech
Contributors: Kekonen, A., Bergelin, M., Eriksson, J., Ylänen, H., Kielosto, S., Viik, J.
Number of pages: 4
Pages: 175-178
Publication date: 17 Nov 2016

Host publication information

Title of host publication: 2016 15th Biennial Baltic Electronics Conference (BEC)
Publisher: IEEE
ISBN (Print): 978-1-5090-1394-4
ISBN (Electronic): 978-1-5090-1393-7
Keywords: Wound healing, Bioimpedance, Mapping, Chronic wound

Bibliographical note

JUFOID=72715

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Bispectrum-based demodulation technique using triple-channel heterodyning of triplet-signal

Paper is dedicated to novel bispectrum-based demodulation technique by using triple-channel heterodyning of triplet-signals. Test statistics used for triplet-signals detection and discrimination are evaluated in the form of the bimagnitude peak values. Experimental study of noise immunity in bispectrum-based digital communication system is performed for suggested triple-channel heterodyning technique. Bit error rate (BER) values are computed under additive Gaussian noise influence in radio communication link for wide variations of input signal-to-noise ratio (SNR).

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Algebraic and Algorithmic Methods in Signal Processing AAMSP, Signal Processing Research Community (SPRC), National Aerospace University
Contributors: Naumenko, V., Solodovnik, V., Totsky, A., Zelensky, A., Astola, J.
Number of pages: 3
Pages: 224-226
Publication date: 14 Dec 2015

Host publication information

Title of host publication: 2015 Second International Scientific-Practical Conference Problems of Infocommunications Science and Technology (PIC S&T)
Publisher: IEEE
ISBN (Print): 9789669751928
ASJC Scopus subject areas: Computer Science (miscellaneous), Computer Science Applications
Keywords: bispectrum, digital communication system, noise imunity, three-channel heterodyning, triplet-signal
Source: Scopus
Source ID: 84962840376

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Blind estimation of speckle variance in synthetic aperture radar images

A task of blind estimation of multiplicative noise (speckle) variance in multi-look images acquired by radars with synthesized aperture array is considered. It is shown that there are several factors affecting accuracy of such estimation. The main of them are spatial correlation of the speckle, complexity of an analyzed image and peculiarities of a method used. Spatial and spectral domain approaches are analyzed. It is shown that for both approaches spatial correlation of the speckle is to be estimated and taken into account. Results for real life TerraSAR-X data are presented as illustrations and for analyzing methods' accuracy.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Tampere University of Technology, Department of Signal Processing, Research group: Computational Imaging-CI, Signal Processing Research Community (SPRC), National Aerospace University
Contributors: Abramova, V. V., Kozhemiakin, R., Abramov, S. K., Lukin, V. V., Zelensky, A. A., Egiazarian, K.
Publication date: 25 Jun 2015

Host publication information

Title of host publication: 2015 International Conference on Antenna Theory and Techniques: Dedicated to 95 Year Jubilee of Prof. Yakov S. Shifrin, ICATT 2015 - Proceedings
Publisher: The Institute of Electrical and Electronics Engineers, Inc.
ISBN (Print): 9781479985579
ASJC Scopus subject areas: Electrical and Electronic Engineering, Computer Science Applications
Keywords: blind estimation, multi-look, SAR, speckle variance

Bibliographical note

EXT="Lukin, V. V."

Source: Scopus
Source ID: 84939434768

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Boundary Integral Operators in Linear and Second-order Nonlinear Nano-optics

Recent advances in the fabrication of nanoscale structures have enabled the production of almost arbitrarily shaped nanoparticles and so-called optical metamaterials. Such materials can be designed to have optical properties not found in nature, such as negative index of refraction. Noble metal nanostructures can enhance the local electric field, which is beneficial for nonlinear optical effects. The study of nonlinear optical properties of nanostructures and metamaterials is becoming increasingly important due to their possible uses in nanoscale optical switches, frequency converters and many other devices.

The responses of nanostructures depend heavily on their geometry, which calls for versatile modeling methods. In this work, we develop a boundary element method for the modeling of surface second-harmonic generation from isolated nanoparticles of very general shape. The method is also capable of modeling spatially periodic structures by the use of appropriate Green’s function. We further show how to utilize geometrical symmetries to lower the computational time and memory requirements in the boundary element method even in cases where the incident field is not symmetrical.

We validate the boundary element approach by the calculation of second-harmonic scattering from gold spheres of different radii. Comparison to analytical solution reveals that under one percent relative error is easily achieved. The method is then applied to model second-harmonic microscopy of single gold nanodots and second-harmonic generation from arrays of L- and T-shaped gold particles. The agreement between the calculations and measurements is shown to be excellent.

To provide a more intuitive understanding of the optical response of nanostructures, we develop a full-wave spectral approach, which is based on boundary integral operators. We present a theory which proves that the resonances of a smooth scatterer are isolated poles that occur at complex frequencies. Other types of singularities, such as branch-cuts, may occur only via the fundamental Green function or material dispersion. We propose a definition of an eigenvalue problem at fixed real frequencies which gives rise to modes defined over the surface of the scatterer. We illustrate that these modes accurately describe the optical responses that are usually seen for certain particle shapes when using plane-wave excitations. With the spectral approach, the resonance frequencies and the modal responses of a scatterer can be found as intrinsic properties independent of any incident field. We show that the spectral theory is compatible with the Mie theory for pherical particles and with a previously studied quasi-static theory in the limit of zero frequency.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Physics, Research area: Optics
Contributors: Mäkitalo, J.
Number of pages: 73
Publication date: 29 May 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3522-2
ISBN (Electronic): 978-952-15-3539-0
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1297
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Breathers Emergence in Spontaneous Modulation Instability

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Physics, Research group: Nonlinear Fiber Optics, Research area: Optics
Contributors: Toenger, S., Godin, T., Billet, C., Dias, F., Erkintalo, M., Genty, G., Dudley, J. M.
Publication date: 2015

Host publication information

Title of host publication: European Quantum Electronics Conference 2015
Publisher: Optical Society of America (OSA)
Article number: EF_P_25
ISBN (Electronic): 978-1-4673-7475-0
Source: Bibtex
Source ID: urn:4ae642c11bd3a5e3ed329d3c2860b0a4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Brownfield Process: A Method for the Rationalisation of Existing Product Variety towards a Modular Product Family

The purpose of the research is to define what kind of design information is needed when existing non-modular product elements are designed towards a modular product family that enables product configuration — and what kinds of steps facilitate this kind of design. Thus this thesis poses two research questions: RQ1. How to structure the design information needed in the designing of modular product families? RQ2. How to create the design information needed in the rationalisation of existing product variety towards a modular product family? The research approach includes application of Design Research Methodology (DRM) as originated by Blessing & Chakrabarti (2009). This research includes four main stages (Research Clarification, Descriptive Study I, Prescriptive Study and Descriptive Study II), all focusing on the defining of influencing factors and their impacts, as DRM suggests. This thesis considers that design reuse, product variety, standardisation, modularisation, product platforms, product families and product configuration are all main product structuring topics when an existing product assortment should be rationalised. Consideration of these topics makes up an effective tactic for the enabling of product variants to be provided for customers, without forgetting the benefits of design reuse and commonality in an industrial environment. The contribution of the research suggests that there are five key factors from a design information perspective that are essential in modular product family development aimed at product configuration. These elements are also the answer to RQ1: - Partitioning logic defines viewpoints that affect product structuring decisions from both a business and customer perspective. - A set of modules includes building blocks of product variants of a product family. - Interfaces (standardised) enable efficient defining of product variants in the order/sales-delivery process. - Architecture describes how modules and their interfaces are related to each other. Architecture also considers layout issues such as space reservations. - Configuration knowledge describes the relations between product family elements and customer needs that create a need for variety. Configuration knowledge can also present compatibilities of product elements or customer needs. The thesis also suggests a design process known as the Brownfield Process (the BfP), and includes ten steps in which design information related to the above key factors is defined. This is the suggested answer to RQ2. - Step 1: Target setting based on business environment - Step 2: Generic element model of the Module System - Step 3: Architecture: generic elements and interfaces - Step 4: Target setting based on customer environment - Step 5: Preliminary product family description - Step 6: Configuration knowledge: generic elements and customer needs - Step 7: Modular architecture: modules and interfaces - Step 8: Configuration knowledge: module variants and customer needs - Step 9: Product family documentation - Step 10: Business impact analysis The role of the BfP within the context of design research is discussed. From an academic viewpoint, there is a lack of these kinds of modularisation methods that aim at configurable products, although single aspects and key factors of the proposed method have been often discussed and their benefits and importance are emphasised separately in the literature. From an industrial viewpoint, the steps of the method can be applied in a real life environment based on the case studies. Thus contribution of the thesis can be considered worthwhile and an important addition in this research field.

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Design, Development and LCM
Contributors: Pakkanen, J.
Number of pages: 283
Publication date: 29 May 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3524-6
ISBN (Electronic): 978-952-15-3537-6
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1299
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisMonograph

Building Codes and Demand Response of Energy Use

Buildings are an essential part of the wider energy system. A significant share of electricity consumption occurs in buildings. Traditionally buildings have been places where electricity is consumed. Now they have a growing role also as a location where renewable energy production, such as solar power, occurs.

Demand response means the voluntary actions that are taken on the customer side as a response to something on the demand side. In practice, demand response can involve, for example, reducing the energy consumption during the peak times of the larger energy system or shifting the timing of the building’s energy consumption by synchronizing it with local renewable energy production’s profile inside the building. The building codes of Finland direct the designers’ energy-related solutions both in new construction and licenced renovations.

In this conceptual paper the literature related to demand response and regulation is reviewed, and it is discussed what kind of a role the building codes could have in advancing the buildings’ preconditions for demand response. Demand response is currently brought out in EU directives in the regulation with relation to network operators. However, preparedness for demand response could also be advanced by giving more attention to the timing of power use in the building codes.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development, Department of Electrical Engineering, Research area: Power engineering, Lappeenranta University of Technology, Tampere University of Applied Science
Contributors: Sorri, J., Heljo, J., Järventausta, P., Honkapuro, S., Harsia, P.
Number of pages: 14
Pages: 8-21
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016: Volume IV : Understanding Impacts and Functioning of Different Solutions
Volume: 4
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Nenonen, S., Junnonen, J.
ISBN (Electronic): 978-952-15-3744-8
Keywords: building codes, demand response, energy law, energy use, power
URLs: 

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Building energy retrofits, occupant health and wellbeing

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Building Physics, Department of Civil Engineering, Research area: Structural Engineering, Natl Inst Hlth & Welf, Finland National Institute for Health & Welfare, Dept Environm Hlth
Contributors: Haverinen-Shaughnessy, U., Pekkonen, M., Turunen, M., Aaltonen, A., Leivo, V.
Number of pages: 9
Pages: 679-687
Publication date: 2016

Host publication information

Title of host publication: CIB World Building Congress 2016 Proceedings : Volume 2 Environmental Opportunities and challenges - Constructing commitment and acknowledging human experiences
Volume: 2
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Prins, M., Wamelink, H., Giddings, B., Ku, K., Feenstra, M.
ISBN (Electronic): 978-952-15-3742-4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Building new computational models to support health behavior change and maintenance: new opportunities in behavioral research

Adverse and suboptimal health behaviors and habits are responsible for approximately 40 % of preventable deaths, in addition to their unfavorable effects on quality of life and economics. Our current understanding of human behavior is largely based on static “snapshots” of human behavior, rather than ongoing, dynamic feedback loops of behavior in response to ever-changing biological, social, personal, and environmental states. This paper first discusses how new technologies (i.e., mobile sensors, smartphones, ubiquitous computing, and cloud-enabled processing/computing) and emerging systems modeling techniques enable the development of new, dynamic, and empirical models of human behavior that could facilitate just-in-time adaptive, scalable interventions. The paper then describes concrete steps to the creation of robust dynamic mathematical models of behavior including: (1) establishing “gold standard” measures, (2) the creation of a behavioral ontology for shared language and understanding tools that both enable dynamic theorizing across disciplines, (3) the development of data sharing resources, and (4) facilitating improved sharing of mathematical models and tools to support rapid aggregation of the models. We conclude with the discussion of what might be incorporated into a “knowledge commons,” which could help to bring together these disparate activities into a unified system and structure for organizing knowledge about behavior.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Signal Processing, Research group: Personal Health Informatics-PHI, Research Community on Data-to-Decision (D2D), University of Southern California, Arizona State University, Northeastern University, National Institutes of Health, Bethesda, Northwestern University, Wharton School, University of Pennsylvania, Scientific Institute Hospital San Raffaelle, Valencia Polytechnical University, Columbia University in the City of New York, VTT Technical Research Centre of Finland
Contributors: Spruijt-Metz, D., Hekler, E., Saranummi, N., Intille, S., Korhonen, I., Nilsen, W., Rivera, D. E., Spring, B., Michie, S., Asch, D. A., Sanna, A., Salcedo, V. T., Kukakfa, R., Pavel, M.
Number of pages: 12
Pages: 335-346
Publication date: 17 Sep 2015
Peer-reviewed: Yes

Publication information

Journal: Translational Behavioral Medicine
Volume: 5
Issue number: 3
ISSN (Print): 1869-6716
Ratings: 
  • Scopus rating (2015): CiteScore 1.63 SJR 0.754 SNIP 0.838
Original language: English
ASJC Scopus subject areas: Behavioral Neuroscience, Applied Psychology
Keywords: Computational models of behavior, Connected health, Health-related behavior, Just-in-time adaptive interventions, mHealth, Mobile health, Real-time interventions

Bibliographical note

EXT="Saranummi, Niilo"

Source: Scopus
Source ID: 84939204163

Research output: Contribution to journalArticleScientificpeer-review

Business intelligence approach – a practical tool for competence based curriculum development

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Knowledge and Learning Research Center, Research group: Business Data Research Group, Research group: Cost Management Center, Research group: Center for Research on Operations Projects and Services
Contributors: Myllärniemi, J., Helander, N., Hellsten, P., Mahlamäki, T., Repo, S.
Number of pages: 17
Pages: 6387-6393
Publication date: 2017

Host publication information

Title of host publication: EDULEARN17 Proceedings. 9th International Conference on Education and New Learning Technologies : 3-5 July, 2017, Barcelona, Spain
Publisher: IATED
ISBN (Print): 978-84-697-3777-4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Business intelligence process model revisited

Today many organizations have come to value knowledge as a production factor. Thus, there is a constant need for getting the information in and sorted. Business intelligence (BI) is a process for systematic acquiring, analyzing, and disseminating data and information from various sources to gain understanding about the business's environment. This is required for supporting decisions for achieving organization's business objectives. Literature has introduced models for planning and executing BI. However, as business environments and technologies evolve in a rapid pace, are the models still applicable? Not all recent issues are taken into consideration in the previous models. BI is considered to be integrated into business processes, so the similar evolution is expected to take place. There are two studies investigating BI instigating this study, but there are still questions to be answered. Literature on different models and findings of these studies were combined to form a vision to better match reality. Various issues like users' active involvement, real-time analysis and presentation, and social media resources were brought up. Practitioners can use the approach to assess their current state of BI activities or planning the organization of BI program.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management
Contributors: Hellsten, P., Myllärniemi, J.
Number of pages: 8
Pages: 341-348
Publication date: 2019

Host publication information

Title of host publication: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Publisher: SCITEPRESS
Editors: Bernardino, J., Salgado, A., Filipe, J.
ISBN (Electronic): 9789897583827

Publication series

Name: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Volume: 3
ASJC Scopus subject areas: Software
Keywords: Business Intelligence, Business Intelligence Process Model, Decision-Making, Organizational Development
Source: Scopus
Source ID: 85074178202

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Business models in the circular economy: a structured multiple-case analysis

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Center for Innovation and Technology Research
Contributors: Ranta, V., Aarikka-Stenroos, L., Mäkinen, S.
Publication date: Dec 2016

Host publication information

Title of host publication: Proceedings of ISPIM Innovation Summit, Kuala Lumpur, Malaysia. The International Society for Professional Innovation Management (ISPIM) : 4-7 December 2016
ISBN (Electronic): 978-952-265-931-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Bus Transportation Accessibility - Does It Impact Housing Values?

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Real estate development, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Kurvinen, A., Sorri, J.
Number of pages: 11
Pages: 321-331
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016 : Understanding impacts and functioning of different solutions
Volume: IV
Place of publication: Tampere
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Nenonen, S., Junnonen, J.
ISBN (Electronic): 978-952-15-3744-8
ASJC Scopus subject areas: Economics, Econometrics and Finance (miscellaneous), Civil and Structural Engineering
Keywords: bus stops, bus traffic, housing prices, public transportation, residential property values, traffic related zones, urban form
URLs: 

Bibliographical note

This paper won World Building Congress 2016 Best Paper Award.

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

By64 Tuulettuvat julkisivut 2016 -suunnittelu- ja toteusohjeen laadinta

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures
Contributors: Annila, P., Lahdensivu, J., Pikkuvirta, J., Pakkala, T.
Number of pages: 6
Pages: 109-114
Publication date: 20 Oct 2015

Host publication information

Title of host publication: Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut. 20.-22.10.2015, Tampere
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka
Editors: Vinha, J., Ruuska, T.
ISBN (Print): 978-952-15-3580-2
Keywords: Double skin facade, Energy efficiency, New renovation consepts, Innovative HVAC, Earth to air heat exchancer

Bibliographical note

AUX=rak,"Pikkuvirta, Jussa"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Calcium signaling in astrocytes: modeling Fura-2AM measurements

General information

Publication status: Published
Organisations: Department of Signal Processing, Research group: Computational Neuro Science-CNS
Contributors: Toivari, E., Manninen, T., Nahata, A. K., Jalonen, T. O., Linne, M.
Number of pages: 1
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Frontiers in Neuroscience
ISSN (Print): 1662-4548
Ratings: 
  • Scopus rating (2010): SJR 1.329 SNIP 0.733
Original language: English

Research output: Contribution to journalMeeting AbstractScientificpeer-review

Campus retrofitting (CARE) methodology: a way to co-create future learning environments

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector
Contributors: Nenonen, S., Eriksson, R., Niemi, O., Junghans, A., Nielsen, S. B., Lindahl, G.
Number of pages: 12
Pages: 738-749
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 20th CIB World Building Congress 2016 : May 30-June 3, 2016, Tampere, Finland
ISBN (Electronic): 978-952-15-3742-4
Keywords: Universities, Space management, Facilities management, Space design
Source: Bibtex
Source ID: urn:3d581eee21d4292b781da57acb1ad288

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Cancer research in the era of next-generation sequencing and big data calls for intelligent modeling

We examine the role of big data and machine learning in cancer research. We describe an example in cancer research where gene-level data from The Cancer Genome Atlas (TCGA) consortium is interpreted using a pathway-level model. As the complexity of computational models increases, their sample requirements grow exponentially. This growth stems from the fact that the number of combinations of variables grows exponentially as the number of variables increases. Thus, a large sample size is needed. The number of variables in a computational model can be reduced by incorporating biological knowledge. One particularly successful way of doing this is by using available gene regulatory, signaling, metabolic, or context-specific pathway information. We conclude that the incorporation of existing biological knowledge is essential for the progress in using big data for cancer research.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Signal Processing, Research group: Computational Systems Biology
Contributors: Yli-Hietanen, J., Ylipää, A., Yli-Harja, O.
Publication date: 11 Apr 2015
Peer-reviewed: Yes

Publication information

Journal: Chinese Journal of Cancer
Volume: 34
Issue number: 10
Article number: 12
ISSN (Print): 1944-446X
Ratings: 
  • Scopus rating (2015): CiteScore 2.63 SJR 1.081
Original language: English
Keywords: Cancer research, Big data, Mathematical modeling, GASTRIC-CANCER, MODULES
Source: WOS
Source ID: 000360225300001

Research output: Contribution to journalArticleScientificpeer-review

Capturing knowledge from research projects: From project reports to storytelling

Research projects are essential tools for creating knowledge and fueling societal developments. Consequently, research efforts are consistent with requirements from accepted scientific methods as they are exhaustively recorded and stored. Traditional approaches are equally effective in helping assess the robustness of research methods. However, approaches to recording research projects leave behind a wealth of tacit knowledge and contextual information. Tacit knowledge and contextual information are essential to enable the development of individual researchers and research teams, which in turn have the potential to increase productivity, effectiveness and impact of future research. Found within the project management literature is the idea of utilizing storytelling to record projects' lessons learned. This paper's main research question is “how would a storytelling framework for capturing and sharing knowledge and contextual information improve organizational memory and the management of research projects?” The framework will be piloted at Canadian, Finnish, and Japanese universities. The effectiveness of the framework will be assessed by comparing it with established procedures to record research projects. In terms of organization, this paper will include a review of the literature, a description of the logic and application of the framework, findings from pilot studies, next steps, and opportunities for future research.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Center for Innovation and Technology Research
Contributors: Machado, M. A., Magnier-Watanabe, R., Peltola, T.
Number of pages: 10
Pages: 2048-2057
Publication date: Sep 2016

Host publication information

Title of host publication: 2016 Portland International Conference on Management of Engineering and Technology (PICMET)
Publisher: IEEE
ISBN (Print): 978-1-5090-3595-3
Keywords: Technological innovation, Technology management
Source: Bibtex
Source ID: urn:e6b6fba93971fe08c9732ef2e4b6d809

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Car Type Recognition with Deep Neural Networks

In this paper we study automatic recognition of cars of four types: Bus, Truck, Van and Small car. For this problem we consider two data driven frameworks: a deep neural network and a support vector machine using SIFT features. The accuracy of the methods is validated with a database of over 6500 images, and the resulting prediction accuracy is over 97 %. This clearly exceeds the accuracies of earlier studies that use manually engineered feature extraction pipelines.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Vision
Contributors: Huttunen, H., Shokrollahi Yancheshmeh, F., Chen, K.
Pages: 1115-1120
Publication date: Jun 2016

Host publication information

Title of host publication: 2016 IEEE Intelligent Vehicles Symposium, IV 2016
Publisher: IEEE
ISBN (Print): 9781509018215

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Case depth prediction of nitrided components

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Materials Science
Contributors: Sorsa, A., Santa-aho, S., Aylott, C., Shaw, B., Vippola, M., Leiviskä, K.
Number of pages: 8
Pages: 65-72
Publication date: 24 Sep 2017

Host publication information

Title of host publication: 12th International Conference on Barkhausen Noise and Micromagnetic Testing
Publisher: ICBM
ISBN (Print): 978-952-68852-0-9
Keywords: Barkhausen noise

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Cavitation erosion, slurry erosion and solid particle erosion performance of metal matrix composite (MMC) coatings sprayed with modern high velocity thermal spray processes

Thermally sprayed metal-matrix composite (MMC) coatings are widely used to protect components and surfaces against wear in various applications. Hard and wear resistant coatings increase the component lifetime and allow the refurbishment of the worn components. This produces significant savings and promotes ecological manufacturing. The current state-of-theart coatings are produced with high velocity oxygen-fuel (HVOF) spray processes, while modern high velocity air-fuel (HVAF) spray process has become increasingly available in production and research. The current study focuses on the performance of tungsten carbide (WC-10Co4Cr) and chromium carbide (Cr3C2-25NiCr) based MMC coatings sprayed with gaseous and liquid fuelled HVOF processes and a modern HVAF spray process. Two powder feedstock types, i.e. dense particles with fine carbides and porous particles with coarse carbides, were selected for both compositions. The results show significant improvements especially for WC-10Co4Cr coatings sprayed with HVAF when compared to HVOF sprayed coatings. In addition, Cr3C2-25NiCr coatings sprayed from the dense powder resulted in improved wear resistance compared to conventional feedstock powder.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, Research group: Surface Engineering, Research group: Materials Characterization, VZÚ Plzeh, University of West Bohemia
Contributors: Matikainen, V., Rubio, S., Ojala, N., Koivuluoto, H., Schubert, J., Houdková, S., Vuoristo, P.
Number of pages: 3
Pages: 1161-1163
Publication date: 1 Jan 2017

Host publication information

Title of host publication: Materials Science and Technology Conference and Exhibition 2017, MS and T 2017 : October 8-12, 2017, Pittsburgh, Pennsylvania USA
Volume: 2
Publisher: Association for Iron and Steel Technology, AISTECH
ISBN (Electronic): 9781510850583
ASJC Scopus subject areas: Mechanics of Materials, Materials Science (miscellaneous), Energy Engineering and Power Technology
Keywords: Cavitation erosion, Coating, Metal matrix composite, Slurry erosion, Thermal spray
Source: Scopus
Source ID: 85047650405

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Cavitation wear characteristics of Al2O3-ZrO2-ceramic coatings deposited by APS and HVOF -processes

Thermally sprayed ceramic coatings are used in environments requiring good wear- and corrosion resistance among others. However, a typical issue with ceramic coatings is their low impact resistance and tendency to fail catastrophically by cracking. In bulk ceramics, the Al2O3-ZrO2–composition has been of interest for long since already small additions of ZrO2 into Al2O3 have shown improvements in fracture toughness compared to pure Al2O3. Efforts are being made to induce this increased resistance to fracturing in thermally sprayed coatings as well, resulting in higher wear resistance due to a more predictable behavior and damage-tolerance. In this work, Al2O3-ZrO2-coatings have been deposited by atmospheric plasma spray (APS) and high-velocity oxy-fuel spray (HVOF) processes. The wear characteristics of the coatings were evaluated with cavitation erosion, delving into the mechanics of the erosion and the resulting microstructural changes in the coatings. Evidence of phase transformation of t-ZrO2 to m-ZrO2 was found during the erosion. The HVOF-sprayed coating exhibited greater wear resistance against the cavitating bubbles due to its finer microstructure.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Materials Science, Research group: Surface Engineering, Institute of Plasma Physics, Academy of Sciences of the Czech Republic
Contributors: Kiilakoski, J., Lukac, F., Koivuluoto, H., Vuoristo, P.
Number of pages: 6
Pages: 928-933
Publication date: 9 Jun 2017

Host publication information

Title of host publication: Internationl Thermal Spray Conference ITSC 2017, Conference Proceedings : June 7-9, 2017, Düsseldorf, Germany.
Volume: 336
Place of publication: Düsseldorf
Publisher: DVS Media GmbH
ISBN (Electronic): 978-3-96144-000-9

Publication series

Name: DVS-Berichte / DVS - Deutscher Verband für Schweißen und Verwandte Verfahren e.V.
Publisher: DVS Media GmbH
ISSN (Electronic): 0418-9639
ASJC Scopus subject areas: Mechanics of Materials, Surfaces, Coatings and Films
Keywords: Thermal spray coating, HVOF spraying, Cavitation damage, alumina-yttria-stabilized zirconia, Erosion testing, PLASMA SPRAY

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

CBRN Defense Using THz Pulse Trains from Semiconductor Disk Lasers

We propose THz generation from a photoconductive antenna illuminated by a train of optical pulses with a pulse repetition rate that corresponds to the desired THz frequency. This new method of THz generation can be seen as a hybrid between the conventional optical THz generation methods, where the optical source is either a heterodyne signal from two continuous wave lasers or a single short pulse. Therefore, the method holds promise for generating both coherent broadband and narrow-linewidth continuous wave THz radiation. The high-repetition rate optical pulse train is obtained from a semiconductor disk laser harmonically mode-locked by a semiconductor saturable absorber mirror and an intracavity etalon. Optical pulse trains with pulse repetition rates from 190 GHz to 580 GHz are demonstrated at an average optical output power of 1 W. This power level is enough for driving full arrays of photoconductive antennas. The approach may provide a compact and powerful THz source for CBRN defense.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Ultrafast and intense lasers
Contributors: Saarinen, E.
Publication date: 2015

Host publication information

Title of host publication: NATO ARW on THz Diagnostics of CBRN effects and Detection of Explosives & CBRN : Proceedings of the NATO ARW on Detection of Explosives and CBRN

Publication series

Name: NATO Science for Peace and Security Series B: Physics and Biophysics
Publisher: Springer
ISSN (Electronic): 1874-6500

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

CEO 2015: Proceedings of the 8th Nordic Conference on Construction Economics and Organization

Nordic conferences on Construction Economics and Organization (CEO conferences) have been biennial events for academics and industry people. These events are bringing together experts globally and those particularly from Nordic countries for sharing and learning new knowledge, to meet colleagues, get new connection and to visit/see interesting construction case projects or companies. For academics these conferences are important publishing channels. The accepted double-blind reviewed papers are published using widely recognised academic media.
We are very pleased to introduce 8th CEO conference 28th – 29th May 2015, Tampere Finland. The overall theme of this CEO2015 conference is Leadership for targeted change and proven advancements. The following titles represent key areas for which the conference was planned to contribute.

• Gaining desirable changes in real estate and construction sector

• Change towards sustainable built environment and environmental friendly behaviour

• Processes and methods for realizing change initiatives

• Principles, methods and tools for the management of change in processes and projects

• Learning from change: challenges in change processes

• Change behaviour – methods and models to affect change processes

• Business and operations management under unceasing change

• Built environment, companies and projects as systems.

The CEO2015 conference comprises 79 accepted papers and their presentations. The special issue of Elsevier Procedia Economics and Finance (Volume 21, 8th Nordic Conference on Construction Economics and Organization) includes 76 papers. This publication includes three papers. The editors are grateful to all authors for their valuable efforts.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development
Contributors: Kähkönen, K. (ed.), Huovinen, P. (ed.), Keinänen, M. (ed.)
Number of pages: 40
Publication date: 2015

Publication information

Publisher: Tampere University of Technology. Department of Civil Engineering
ISBN (Electronic): 978-952-15-3534-5
Original language: English

Publication series

Name: Tampere University of Technology. Department of Civil Engineering. Construction Management and Economics. Report
Publisher: Tampere University of Technology
Volume: 16
ISSN (Print): 1797-8904

Bibliographical note

Versio ok 14.12.2015

Research output: Book/ReportCommissioned reportProfessional

Challenges Facing BIM Education: Development of Appropriate Teaching and Learning Resources

Building Information Modelling (BIM) is becoming the new norm in the AEC industry and also part of many construction project management (CPM) programmes. In terms of teaching BIM there is the need for specific resources in explaining the theoretical principles of BIM, BIM tools (authoring, audit and analysis) and building models themselves. Theoretical resources that are available for education in the form of books, articles and websites are easy and straightforward to locate. Likewise a good share of various tools are available for educational purposes. On the other hand, actual building models represent a challenge in terms of preparing and optimising usage of the model for high quality educational purposes. This paper addresses the difficulty in walking the narrow line between an industry ready BIM versus a BIM that is good for student learning and offers a realistic and practical, but simultaneously achievable learning environment. Conducting a case study in an undergraduate CPM education setting, three approaches for obtaining BIM resources were identified with various challenges and benefits. A combination of internally developed models for early exposure and industry models for later courses is proposed.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development
Contributors: Puolitaival, T., Forsythe, P., Kähkönen, K.
Publication date: 2015

Host publication information

Title of host publication: RICS COBRA AUBEA 2015 : The Construction, Building and Real Estate Research Conference of the Royal Institution of Chartered Surveyors
Place of publication: London
Publisher: Royal Institution of Chartered Surveyors
ISBN (Print): 978-1-78321-071-8

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Challenges in developing data-based value creation

Understanding data-based value creation helps organizations to enhance its decision-making and to renew their business operations. However, organizations aiming to use modern data analytics face several severe challenges that are not usually so evident or visible beforehand. In this paper we study a Finnish manufacturing company's data empowerment and information and knowledge management practices in order to identify the potential challenges related to modern data-based value creation within industrial context. The empirical data is consisted of group discussions, relevant data sets acquired from the case company's information systems, and lastly, 12 thematic interviews of the key actors in the company in relation to service development. The study provides valuable insights for managing service development and decision-making and creates understanding on data-based value creation. Achieved understanding provides meaningful knowledge for organizations utilizing or having plans to utilize, for example, data analytic methods in their businesses.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management
Contributors: Myllärniemi, J., Helander, N., Pekkola, S.
Number of pages: 7
Pages: 370-376
Publication date: 2019

Host publication information

Title of host publication: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Publisher: SCITEPRESS
Editors: Bernardino, J., Salgado, A., Filipe, J.
ISBN (Electronic): 9789897583827

Publication series

Name: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Volume: 3
ASJC Scopus subject areas: Software
Keywords: Case Study, Data-based Value Creation, Information Management Process, Knowledge Management
Source: Scopus
Source ID: 85074145799

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Challenges in the paradigm change from mobility as a self-service to mobility as a service

The predominant paradigm of everyday mobility in Finland is mobility as a self-service where most of the mobility needs are taken care with passenger cars. The ‘Mobility as a Service’ (MaaS) model is a new paradigm that challenges the current mobility practises. The purpose of this paper is to describe the current state of mobility and analyse the potential and challenges of MaaS against current situation in demographics, mobility and mobility related consumption in Finland. It would require a big shift in the current mobility practises for MaaS to become mainstream. In this paper, on one hand potential and one the other more challenging customer segments are recognised and the possibilities of MaaS to address these are discussed.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Civil Engineering
Contributors: Pöllänen, M., Utriainen, R., Viri, R.
Number of pages: 20
Pages: 246-265
Publication date: 2017

Host publication information

Title of host publication: Conference Proceedings 1st International Conference of Mobility as a Service : ICoMaaS, Tampere 28.-29.11.2017
Publisher: Tampere University of Technology
Keywords: Mobility as a Service, MaaS, challenges, potential

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Changes in operations when introducing disruptive technologies

Disruptive technologies alter the competitive conditions by proposing new sources of value to the customers and possibly cannibalizing existing offerings. Their implications are frequently discussed from the perspective of markets and competition, whereas changes in the internal operations of manufacturing firms are not sufficiently considered. This study explores changes in the practices and delivery chain cooperation of suppliers, when introducing disruptive technologies. In an embedded case study of two disruptive material technologies, we find support for the cognitive and behavioral aspects of changes and reveal the contingent nature and unique character of technology introduction in the business-to-business context.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Martinsuo, M., Ahvenniemi, O., Vaittinen, E.
Publication date: 2015

Host publication information

Title of host publication: 22nd EurOMA Conference : Operations management for sustainable competitiveness
Place of publication: Switzerland
Publisher: European Operations Management Association
Keywords: operations change, disruptive technology, product innovation

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Characterising the industrial context of engineering change management

Engineering changes (EC) and their management (ECM) can be categorized from several points of view. In this paper an EC is mainly considered from the position in lifecycle of the object of change: NPD vs. serial production. The performance aspects of engineering change processes emphasize the balancing of speed of the processes and the communication and assessment of consequent changes. ECM practices are studied by comparing two case companies. The cases indicate ECM is highly related to the organization, history and strategy of a company. The increased efficiency in engineering changes is aspired by streamlined ECM in new product development, while enhanced ECM processes apparently batch ECs for increased overall effectivity. The mutual challenge for the studied companies is that the NPD projects result with a set of change requests for serial production.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanical Engineering and Industrial Systems, VTT Technical Research Centre of Finland
Contributors: Pulkkinen, A., Huhtala, P., Leino, S., Anttila, J. P., Vainio, V. V.
Number of pages: 10
Pages: 618-627
Publication date: 2016

Host publication information

Title of host publication: Product Lifecycle Management in the Era of Internet of Things : 12th IFIP WG 5.1 International Conference, PLM 2015, Doha, Qatar, October 19-21, 2015, Revised Selected Papers
Publisher: Springer New York LLC
ISBN (Print): 9783319331102

Publication series

Name: IFIP Advances in Information and Communication Technology
Volume: 467
ISSN (Print): 1868-4238
ASJC Scopus subject areas: Information Systems and Management
Keywords: Case study, Comparison, ECM

Bibliographical note

EXT="Leino, Simo-Pekka"

Source: Scopus
Source ID: 84964894186

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Characteristics of Digital Hydraulics with Commercial Controllers

Model-based control algorithms of digital hydraulic valves offer optimized control performance, but are computationally heavy. Research work has been carried out using PC hardware such as dSPACE real-time systems. In order to apply digital hydraulic valve control in real, series production application, the algorithms should be redesigned such that controllers with limited computation power are sufficient. The paper presents methods for lowering the computational burden and shows the effect of optimization methods in execution time. Model-based controller design is carried out in MATLAB/Simulink and automatic code generation is used in implementation phase. A wheel loader equipped with digital hydraulic valve system is presented as a test case, where control algorithms are implemented on commercial Bosch Rexroth BODAS RC controller. Preliminary work for computationally faster control algorithms is carried out on mobile boom mock-up. The methods presented decrease the execution time to approximately 1/194 of the original.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Digital hydraulics, Research group: Fluid power automation in mobile machines, Research group: Powertrain design
Contributors: Huova, M., Ahopelto, M., Ketonen, M., Ahola, V., Linjama, M., Huhtala, K.
Number of pages: 15
Pages: 114-128
Publication date: Feb 2015

Host publication information

Title of host publication: The Seventh Workshop on Digital Fluid Power
Publisher: Linz Center of Mechatronics
ISBN (Print): 978-3-200-04014-4
Keywords:  Digital Hydraulics, Digital Valve System, Digital hydraulic valve control, DFCU, Optimization, Mobile machine

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Characterizing the Context of Use in Mobile Work

The context of use has been widely acknowledged as important when designing and evaluating systems for work related activities. This paper describes in case of mobile news making the synthesized findings on the context of use. Findings are categorized to five components and nineteen subcomponents and characterized with examples from our studies. The presented findings validate a previously presented model for context of use in mobile HCI, extend it, and elaborate the definitions for the components. The presented elaborated model can be applied by academics and practitioners in development, research and evaluation activities from identifying requirements to evaluating systems for mobile work. Findings support understanding what circumstances and how they can contribute to user experience and acceptance of designed systems.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: User experience, Augmented Human Activities (AHA)
Contributors: Väätäjä, H.
Number of pages: 167
Pages: 97-113
Publication date: 2015

Host publication information

Title of host publication: Human Work Interaction Design. Work Analysis and Interaction Design Methods for Pervasive and Smart Workplaces : 4th IFIP 13.6 Working Conference, HWID 2015, London, UK, June 25-26, 2015, Revised Selected Papers
Publisher: Springer Verlag
ISBN (Print): 978-3-319-27047-0
ISBN (Electronic): 978-3-319-27048-7

Publication series

Name: IFIP Advances in Information and Communication Technology
Volume: 468
ISSN (Print): 1868-4238
ASJC Scopus subject areas: Computer Science (miscellaneous)
Keywords: human-computer interaction, human-technology interaction, work, mobile work, CONTEXT, context of use, journalism, smartphone, news, news making
Electronic versions: 

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Charged cable-system ESD event

A charged electronic system failed while it was connected to a USB port. The resulting discharge current waveform had a sub-nanosecond initial peak that bypassed on-board protection devices. In this study the ESD stress waveform is analyzed with simulation and measurement methods.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering
Contributors: Tamminen, P., Viheriäkoski, T.
Publication date: 18 Oct 2016

Host publication information

Title of host publication: 2016 38th Electrical Overstress/Electrostatic Discharge Symposium (EOS/ESD)
Publisher: IEEE
ISBN (Electronic): 978-1-5853-7289-8
Keywords: cable shielding, cables (electric), electromagnetic shielding, electrostatic discharge, peripheral interfaces, ESD stress waveform, USB port, charged cable system ESD event, charged electronic system, discharge current waveform, on-board protection devices, subnanosecond initial peak, Cable TV, Cable shielding, Current measurement, Discharges (electric), Power cables, Universal Serial Bus, Wires
Source: Bibtex
Source ID: urn:5e9eb39001154b3f7501d98bb2d14c27

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Charge relaxation of slowly dissipative polymers

Charge relaxation times of solid planar polymers were assessed with different charging methods in a controlled environment. Electrically isolated samples had relatively long relaxation periods. The longest measurement sequence was 62 hours. An electrostatic behavior of the samples under test was then characterized in a changing electrostatic field.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering
Contributors: Viheriäkoski, T., Kärjä, E., Hillberg, J., Tamminen, P.
Number of pages: 9
Pages: 1-9
Publication date: 18 Oct 2016

Host publication information

Title of host publication: 2016 38th Electrical Overstress/Electrostatic Discharge Symposium (EOS/ESD)
Publisher: IEEE
ISBN (Electronic): 978-1-5853-7289-8
Keywords: electric charge, electrostatics, polymers, charge relaxation, electrical isolated sample, electrostatic field behavior, slowly dissipative polymer, solid planar polymer, time 62 hour, Charge measurement, Charge transfer, Electric potential, Electrodes, Electrostatics, Ions
Source: Bibtex
Source ID: urn:dd06edd7b8b73b5d55aa28c271275556

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Circularly Polarized Textile Antenna For 2.45 GHz

This paper presents a circularly polarized antenna on thin and flexible Denim substrate for Industrial, Scientific and Medical (ISM) band and Wireless Body Area Network (WBAN) applications at 2.45 GHz. Copper tape is used as the conductive material on 1 mm thick Denim substrate. Circular polarization is achieved by introducing rectangular slot along diagonal axes at the center of the circular patch radiator. Bandwidth enhancement is done using partial and slotted ground plane. The measured impedance bandwidth of the proposed antenna is 6.4 % (2.42 GHz to 2.58 GHz) or 160 MHz. The antenna exhibits good radiation characteristics with gain of 2.25 dB. Simulated and measured results are presented to validate the operability of antenna within the proposed frequency bands.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Wireless Identification and Sensing Systems Research Group, Sensing Systems for Wireless Medicine (MediSense), Department of Electrical Engineering, University of California, Los Angeles, California, USA
Contributors: Rizwan, M., Rahmat-Samii, Y., Ukkonen, L.
Number of pages: 2
Pages: 51-52
Publication date: 21 Sep 2015

Host publication information

Title of host publication: Circularly Polarized Textile Antenna For 2.45 GHz
Publisher: IEEE
ISBN (Electronic): 978-1-4799-8543-2
Keywords: Denim, Industrial, Scientific and Medical (ISM) band, Wireless Body Area Network (WBAN), Textile antenna, Circular Polarization

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Classification of Knowledge Representation Implementations in the Manufacturing Systems Domain

Ontologies are presented as a powerful mechanism for integration of components that are located in different levels of the ISA-95 automation pyramid, which is widely known in the industrial automation domain. Hence, the development of systems that use knowledge representation is a feasible manner for the reduction of efforts, e.g. in vertical communication implementation. This kind of research is challenging because of the quantity of cross-layer information exchange. In fact, as industrial automation systems are, by nature, dynamic, process control components must be capable of adapting fast to changes. Furthermore, reconfiguration of scalable systems can be automated through ontology modeling. This chapter presents an investigation on how representation of knowledge is utilized in different industrial automation developments. In addition, main concepts and requirements for designing knowledge representation implementations are identified and described. Finally, according to this description, a classification of distinct implementations is also presented.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Automation Science and Engineering, Research group: Factory automation systems technology
Contributors: Ramis Ferrer, B.
Number of pages: 10
Pages: 235-244
Publication date: 2015

Host publication information

Title of host publication: Open Knowledge-Driven Manufacturing & Logistics : The eScop Approach
Publisher: Warsaw University of Technology Publishing House
Editors: Strzelczak, S., Balda, P., Garetti, M., Lobov, A.
ISBN (Print): 978-83-7814-440-3

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Clean Components of Fluid Power System Reduce Maintenance Costs

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Condition monitoring of hydraulic components and systems
Contributors: Rinkinen, J., Elo, L.
Number of pages: 8
Publication date: 1 Oct 2015

Host publication information

Title of host publication: Maintenance, Condition Monitoring and Diagnostics; Maintenance Performance Measurement and Management : MCMD 2015 and MPMM 2015
Article number: 2 (2015-10-01)
ISBN (Print): 978-951-98113-7-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Clothing-Integrated Passive RFID Strain Sensor Platform for Body Movement-Based Controlling

This paper introduces the fabrication and wireless performance evaluation of a passive ultra-high frequency (UHF) radiofrequency identification (RFID)-based strain sensor platform, which is designed for body movement-based human-technology interaction. The used RFID platform is fabricated from electro-textile materials and can thus be seamlessly integrated into clothing. A two-part antenna structure is utilized in this work to avoid the reliability challenges caused by mechanical stresses that clothing-integrated electronics need to endure. The fabricated sensor has an initial peak read range of 5 meters, which is an excellent result for on-body performance. Further, the platform is functional throughout the global UHF RFID frequency band. During elongation, the peak read range of the sensor has a significant decrease, but it is still readable from distances of 2.5 meters. Thus, this sensor can be read wirelessly from a convenient distance, when considering its practical use in body movement-based controlling of digital devices. The wireless performance of the sensor platform has a significant change caused by arm elongation, which based on our initial results can be clearly read from the changed backscattered signal. Thus, based on these preliminary results, our sensor platform shows potential as a passive clothing-integrated controller, which can turn simple gestures into inputs for digital devices.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: BioMediTech, Research group: Wireless Identification and Sensing Systems Research Group
Contributors: He, H., Chen, X., Ukkonen, L., Virkki, J.
Number of pages: 4
Pages: 236-239
Publication date: 7 Nov 2019

Host publication information

Title of host publication: 2019 IEEE International Conference on RFID Technology and Applications (RFID-TA)
Publisher: IEEE
ISBN (Print): 978-1-7281-0590-1
ISBN (Electronic): 978-1-7281-0589-5
Keywords: Electro-textiles, human-technology interaction, passive UHF RFID technology, strain sensor, clothing-integrated electronics
Source: Bibtex
Source ID: 8892118

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Coarse-grained model of protein interaction for bio-inspired nano-communication

Bio-inspired nano-communication enables nanoscale devices to exchange information with each other by various natural mechanisms of data transfer. One of the most perspective way in bio-inspired communications is using the protein interactions, which refer from various proteins conformation states. In this paper, we describe our new coarsegrained model for protein conformation estimation based on fast transport task solving, developed algorithm and software which implement this model are provided.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Emerging Technologies for Nano-Bio-Info-Cogno, Wireless Communications and Positioning (WICO), Russian Academy of Sciences, ITMO University
Contributors: Knyazev, S., Tarakanov, S., Kuznetsov, V., Porozov, Y., Koucheryavy, Y., Stepanov, E.
Number of pages: 3
Pages: 260-262
Publication date: 6 Jan 2015

Host publication information

Title of host publication: 2014 6th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)
ISBN (Print): 978-1-4799-5291-5
ASJC Scopus subject areas: Computer Networks and Communications, Control and Systems Engineering
Keywords: biology signaling, coarse-grained model, nano-communications, protein conformation change
Source: Scopus
Source ID: 84932108897

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Co-creating digital services for citizens: Activity theory analysis

Smart city development relies heavily on creation of digital services that are available for the citizens and for the city authorities. At best, these services are co-created by the authorities, citizens and the digital solution supplier companies. Digital service co-creation is, however, a complex process and includes several contradictions due to presence of several stakeholders. In this paper, we present a case study of smart city initiated digital service co-creation process through the analytical lenses of activity theory.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management, HAMK Design Factory, HAMK University of Applied Sciences, HAMK Smart Research Unit
Contributors: Jussila, J., Kukkamäki, J., Helander, N.
Number of pages: 6
Pages: 285-290
Publication date: 2019

Host publication information

Title of host publication: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Publisher: SCITEPRESS
Editors: Bernardino, J., Salgado, A., Filipe, J.
ISBN (Electronic): 9789897583827

Publication series

Name: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Volume: 3
ASJC Scopus subject areas: Software
Keywords: Activity Theory, Co-creation, Digital Service, Empirical Study

Bibliographical note

EXT="Jussila, Jari"

Source: Scopus
Source ID: 85074137289

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Cold-formed RHS T joints with initial geometrical imperfections

Generally, numerical simulations of structures are carried out in such a way as to most accurately repeat their real behavior. The current rules for finite element modeling of tubular joints oblige scientists and engineers to construct their numerical models considering initial imperfections. However, not all joints are sensitive to initial imperfections. Often consideration of initial imperfections brings no reasonable improvements in the accuracy of results, but severely complicates numerical simulations. In such cases, the effect of geometrical imperfections can be effectively replaced by a simple theoretical equation or neglected entirely. This paper evaluates the effect of initial geometrical imperfections on the structural behavior of cold-formed rectangular hollow section T joints. Imperfections are simulated using the conventional approach for thin-walled structures, applying corresponding buckling modes to the perfect geometry. The paper analyzes several buckling modes and their combinations to identify the most rational technique for simulation of imperfections under in-plane bending and axial loading. Based on the obtained results, parametric studies are conducted to investigate the effect of initial imperfections on joints with various geometry and material properties. The results demonstrate that initial imperfections reduce the resistance and initial stiffness of joints. However, the observed effect has been found sufficiently small to be safely ignored in computational analyses.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, St. Petersburg State Polytechnical University
Contributors: Garifullin, M., Bronzova, M. K., Heinisuo, M., Mela, K., Pajunen, S.
Number of pages: 14
Pages: 81-94
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Magazine of Civil Engineering
Volume: 80
Issue number: 4
ISSN (Print): 2071-4726
Ratings: 
  • Scopus rating (2018): CiteScore 2.75 SJR 1.062 SNIP 2.28
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Finite element analysis, Hollow section joint, Imperfection, Initial stiffness, Resistance
Electronic versions: 
Source: Scopus
Source ID: 85051540096

Research output: Contribution to journalArticleScientificpeer-review

Collagen-immobilized polyimide membranes for retinal pigment epithelial cell adherence and proliferation

Degenerative retinal diseases are a leading cause of visual loss and irreversible blindness, particularly in the developed world. Retinal pigment cell (RPE) transplantation is nowadays considered the most promising therapeutic approach for certain retinal diseases, and the presence of a supportive scaffold has been considered essential to ensure the success of the implant. In this work, collagen IV was covalently immobilized to the surface of polyimide membranes, with the purpose of developing scaffold materials for RPE cell culture. The covalent modification method involved four steps: argon-plasma treatment, acrylic acid graft polymerization, surface activation, and finally immobilization of collagen type IV. Collagen-modified membranes did not become more rough but became significantly more hydrophilic than the unmodified and dip-coated controls. ARPE-19 cell morphology and attachment were studied by immunofluorescence staining and confocal microscopy. Covalently modified surfaces showed cell attachment and cell properties comparable to the uncoated and dip-coated controls. This work demonstrated the potential of collagen IV-immobilized polyimide membranes as substrates for the growth of ARPE-19 cells.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Faculty of Biomedical Sciences and Engineering, Research group: Biomaterials and Tissue Engineering Group, BioMediTech, University of Tampere, BioMediTech
Contributors: Teymouri, S., Calejo, M. T., Hiltunen, M., Sorkio, A. E., Juuti-Uusitalo, K., Skottman, H., Kellomäki, M.
Publication date: 6 Mar 2017
Peer-reviewed: Yes

Publication information

Journal: Cogent Chemistry
Volume: 3
Issue number: 1
ISSN (Print): 2331-2009
Original language: English
Keywords: Polyimide, Retinal pigment epithelial cell, SURFACE MODIFICATION, tissue engineering

Research output: Contribution to journalArticleScientificpeer-review

Collective nonlinear optical effects in plasmonic nanohole ensembles of different rotational symmetries

We use cylindrical vector beams to investigate second-harmonic generation from rotationally symmetric arrangements of plasmonic nanoholes. The second-harmonic efficiency is shown to depend strongly on collective interactions between the nanoholes.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Photonics, Research group: Nonlinear Optics, University of Tübingen
Contributors: Bautista, G., Dreser, C., Zang, X., Kern, D., Kauranen, M., Fleischer, M.
Number of pages: 2
Publication date: 2018

Host publication information

Title of host publication: CLEO : QELS_Fundamental Science 2018
Publisher: The Optical Society; OSA
Article number: FW3G.3
ISBN (Electronic): 978-1-943580-42-2
Electronic versions: 
URLs: 

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Color-distribution similarity by information theoretic divergence for color images

The divergence similarity between two color images is presented based on the Jensen-Shannon divergence to measure the color-distribution similarity. Subjective assessment experiments were developed to obtain mean opinion scores (MOS) of test images. It was found that the divergence similarity and MOS values showed statistically significant correlations.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Vision, University of Niigata, KLab, Japan, K-JIST, Dongguk University, Seoul
Contributors: Murayama, M., Oguro, D., Kikuchi, H., Huttunen, H., Ho, Y. S., Shin, J.
Publication date: 17 Jan 2017

Host publication information

Title of host publication: 2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016
Publisher: IEEE
ISBN (Electronic): 9789881476821
ASJC Scopus subject areas: Artificial Intelligence, Computer Science Applications, Information Systems, Signal Processing

Bibliographical note

JUFOID=72850

Source: Scopus
Source ID: 85013813769

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Combining Product Innovation With Service Innovation to Increase Value Created With a System

The focus in the businesses of manufacturing and selling technological devices has been increasingly shifting from USA and Europe towards Asiatic countries due to cost-effectiveness and lower costs of resources. In the areas where costs are inevitably higher, new measures have to be considered in order to be able to compete in the global economy. In this article, we study how can we utilize combined benefits of technological and service innovations in competing against the traditional product-oriented offerings. Product-service systems are integrated systems of products and services that create value through use for customers; the hypothesis in this article is that the efficiency of the business network can be increased by designing an integrated product-service system in comparison to the product-oriented approach. The hypothesis is studied via a real-life product-service system design case study of an automated recycling system, and system dynamics simulation is used to analyze the value created with the system in the related business network. In theory, product-service systems have many potential benefits in comparison to product-oriented offerings; identifying the benefits in practice in a case study increases the understanding of product-service systems design and facilitate their application in the industry.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Aalto University, Aalto Univ, Aalto University, Sch Engn, Dept Engn Design & Prod
Contributors: Ritola, T., Coatanea, E.
Number of pages: 10
Publication date: 2014

Host publication information

Title of host publication: Proceedings of the ASME international mechanical engineering congress and exposition, 2013, vol 12
Publisher: AMER SOC MECHANICAL ENGINEERS
ISBN (Print): 978-0-7918-5641-3
Source: WOS
Source ID: 000360320700022

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Commercialising reclaimed materials in earthworks – guidelines for productization and the process of appending these materials in the Finnish national code of practice

To decrease the use of non-renewable natural resources as well as environmental effects of earth-works, natural aggregate materials can be replaced with recycled materials acquired from surplus soil, industrial by-products and waste, etc. When wishing to increase the usage of these reclaimed materials (=“UUMA”-material), the usage must be straightforward for developers, designers and constructors alike. To make this possible, the materials must have design guidelines for their appro-priate applications. They must be productized and CE marked or otherwise authorized, and the con-struction guidelines for the materials must be included in the Finnish general specifications for in-frastructural construction works (InfraRYL). As productization is especially important in increasing the usage of UUMA materials, guidelines for vendors are being drawn that present information on commercializing reclaimed materials to be used in earthworks. The guidelines for productization are being prepared in the Finnish national UUMA2 programme (2013-2017, www.uuma2.fi), which was created to promote the use of recycled materials in earthworks.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research area: Infrastructure Construction, Research group: Earth Constructions, Research group: Track Structures, Ramboll Finland Ltd.
Contributors: Koivisto, K., Forsman, J., Ronkainen, M., Lahtinen, P., Kolisoja, P., Kuula, P.
Number of pages: 10
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 17th Nordic Geotechnical Meeting Reykjavik Iceland : Challenges in Nordic Geotechnic 25th - 28th of May
Place of publication: Reykjavik
Publisher: Icelandic Geotechnical Society
ISBN (Electronic): 978-9935-24-002-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparative evaluation of radio propagation properties at 15 GHz and 60 GHz frequencies

Due to explosive growth in the mobile data demand, millimeter-wave (mmWave) spectrum is to become one of the key enablers for the next-generation 5G wireless. Accurate characterization of mmWave channels has crucial implications on 5G network planning — as compared to more conventional frequency bands — due to a higher impact that surrounding objects have on the radio propagation. In this work, we contribute mmWave channel measurements and compare our obtained results across several metrics of interests, mindful of previously standardized models. The proposed analysis is conducted for a typical mmWave system deployment operating at 15 and 60 GHz. The evaluation studies a difference between the obtained results for the two frequency bands considered, as well as verifies their predictability when utilizing modern modeling considerations.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering, Research group: Emerging Technologies for Nano-Bio-Info-Cogno
Contributors: Solomitckii, D., Semkin, V., Naderpour, R., Ometov, A., Andreev, S.
Number of pages: 5
Pages: 91-95
Publication date: 1 Nov 2017

Host publication information

Title of host publication: 2017 9th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)
Publisher: IEEE
ISBN (Electronic): 978-1-5386-3435-6
Keywords: 3GPP, Antenna measurements, Delays, Optical attenuators, Optical transmitters, Receiving antennas, channel sounding, mmWave systems, practical measurements, radio propagation, urban deployments

Bibliographical note

jufoid=72315

Source: Bibtex
Source ID: urn:e3e92af655321f382b94981bdab749a2

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparative investigation of remote tracking devices for aging care

Tracking devices help the elderly patients to remain safe, secure and traceable in case of getting lost or in an emergency. This research work was conducted to evaluate the appropriateness of few commercially available tracking devices for aging people, by identifying their usefulness, efficiency, limitations and further improvements. Research involved two steps; literature review about two existing tracking devices simply termed device A and device B, followed by a performance and comparative analysis of the aforementioned devices by applying basic statistics on the results obtained from a questionnaire survey. Devices were used by two groups of people: aging (>70 year old) and middle-aged patients (less than 70 years old) who reported their satisfaction levels about the said devices on a scale of one to five. These devices were found helpful in reducing the dependency of the elderly on others and raised their privacy values. However, these were not recommended for severe memory loss or later stage of critical staged dementia patients because learning and memorizing the process of handling these devices can be difficult for them. Overall, the performance of device B outplayed device A while comparing all considered device parameters. The calling feature of device B appeared to be an appealing characteristic with mean satisfaction levels of 4.9 textpm 0.32 and 4.7 textpm 0.48 as reported by the middle-aged and aging groups, respectively. These devices will be helpful in decreasing unnecessary rush at health care centers or lost person reporting in police. In upcoming years, these devices can be developed to remotely monitor the movement of the patient.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Faculty of Biomedical Sciences and Engineering
Contributors: Munir, M. W., Shahid, N., Omair, S. M., Munir, G., Ul Haque, M. Z.
Number of pages: 6
Pages: 261-266
Publication date: 1 Sep 2017
Peer-reviewed: Yes

Publication information

Journal: INTERNATIONAL JOURNAL OF INFORMATION TECHNOLOGY
Volume: 9
Issue number: 3
ISSN (Print): 2511-2112
Original language: English
Source: Bibtex
Source ID: urn:3fb5001f93a07dc83f4e1bd74b4d0420

Research output: Contribution to journalArticleScientificpeer-review

Comparing two methods for Urban Complexity calculation using Shannon-Wiener index

This study will compare the results of measuring Urban Complexity using Shannon-Wiener index in two different methods. Using a joint dataset retrieved from Foursquare API, we will measure the degree of urban complexity of every street 1. relating every amenity to the closest street segment in a computational way and then applying the calculation to the segments, and 2. applying the calculation to every cell of a grid that will be combined with the street network afterwards. The selected case study is the city of London and the dataset employed will be retrieved from Foursquare. Over 79,000 venues were collected and classified in over 660 categories. In order to proceed to the analysis, these 660 categories will be reduced to 10 based on the classification of activities observed in the public space from the traditional urban discipline. Then the urban complexity index of each Street segment of London will be measured as a simultaneous calculation of the density and diversity of collected and classified economic activities.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Architecture, University of Alicante, SPIN Unit
Contributors: López Baeza, J., Cerrone, D., Männigo, K.
Number of pages: 10
Pages: 369-378
Publication date: 2017

Host publication information

Title of host publication: Comparing two methods for Urban Complexity calculation using Shannon-Wiener index
Publisher: WIT Press

Publication series

Name: WIT Transactions on Ecology and The Environment
Volume: 226
ISSN (Print): 1743-3541
ISSN (Electronic): 1746-448X

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparison between calculated and billed building energy consumption values of schools and daycare centers

In many countries, building regulations set requirements for energy efficiency, which must be fulfilled in order to have a building permit. Because the actual building does not yet exist, the calculations are done in the early design phase with approximate input data. This paper presents results from dynamic whole-building simulations and compares the results to monthly calculation results, billed energy consumption and to a small number of central building energy efficiency parameters. According to the results, using a more sophisticated calculation tool does not necessarily improve the accuracy of the calculation results, if the capabilities of the tool are not properly utilised. Although there was a clear difference between the calculated and billed values, lower calculated energy consumption did correlate with lower billed values. Besides the need for extra effort to ensure accurate input data in general, input values related to infiltration and ventilation should be evaluated especially carefully.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering, Research group: Building Physics
Contributors: Ruusala, A., Laukkarinen, A., Vinha, J.
Number of pages: 6
Publication date: 2019

Host publication information

Title of host publication: MATEC Web of Conferences : CESBP 2019
Volume: 282
Place of publication: Prague, Czech Republic
Publisher: EDP Sciences
Editors: Černý, R., Kočí, J., Kočí, V.
Article number: 02085
ASJC Scopus subject areas: Civil and Structural Engineering
Keywords: building energy consumption, simulation, Building physics, calculated building energy consumption, billed building energy consumption

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparison of Detection Techniques for Multipath Propagation of Pseudolite Signals Used in Dense Industrial Environments

Modern industrial environments with automated production machinery often require special indoor positioning and localization techniques, due t. The presence of objects and o. The infrastructure that may obstruc. The line-of-sight propagation or interfere wit. The behaviour of electromagnetic waves. These challenges are difficult to overcome b. The widely employed GNSS positioning system designed for use in outdoor areas. One of existing indoor positioning systems ar. The pseudolites, which transmit positioning signals similar t. The ones used by GNSS systems. One o. The sources of errors for pseudolites i. The multipath propagation. Our paper compare. The performances of several multipath propagation detection techniques, using Binary Offset Carrier (BOC) navigation signal and determines that errors increases sharply whe. The receiver uses navigation signals that have multipath propagation. The techniques that we present improv. The positioning accuracy, which leads to more precise industrial processes.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Wireless Communications and Positioning, Ministry of National Education. University Politehnica of Bucharest
Contributors: Alexandru, R., Lohan, E.
Number of pages: 7
Pages: 1294-1300
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Engineering
Volume: 100
Issue number: C
ISSN (Print): 1877-7058
Ratings: 
  • Scopus rating (2015): CiteScore 0.56 SJR 0.239 SNIP 0.566
Original language: English
ASJC Scopus subject areas: Energy(all)
Keywords: Binary Offset Carrier, GNSS, Indoor positioning, Multipath propagation, Pseudolite
Source: Scopus
Source ID: 84925047361

Research output: Contribution to journalArticleScientificpeer-review

Comparison of food frequency questionnaire data and shopping records for the assessment of food intake

Questionnaires are typically used for collecting information
describing health behavior in areas such as diet, physical activity and sleep.
Utilization of the digital footprint, formed from an individual’s unique digital
activities, forms a potential new opportunity for describing lifestyle and
health-related behavior. We studied if passively collected shopping data
describes food intake when compared to food frequency questionnaire (FFQ)
data providing information on food and beverage consumption. For 4 out of 21
food groups the results were comparable. Shopping information from only one
department store chain gives only a partial picture of the food consumption and
differing family sizes add noise to the estimate. If the whole digital footprint
would be available, including detailed product-level shopping information from
all stores and restaurants, the food intake could probably be estimated more
accurately and applied e.g. in personalized coaching.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Institute for Molecular Medicine, FIMM, HiLIFE, University of Helsinki
Contributors: Kallonen, A., Nieminen, H., Das, S., Sallinen, R.
Pages: 25-30
Publication date: 27 Aug 2018

Host publication information

Title of host publication: Proceedings of Seventh International Conference on Well-Being in the Information Society: Fighting Inequalities (WIS 2018)
ISBN (Electronic): 978-952-12-3727-0

Publication series

Name: TUCS Lecture Notes
Volume: 28
ISSN (Electronic): 1797-8831
ASJC Scopus subject areas: Molecular Medicine
Keywords: Food intake assessment, shopping data, food frequency questionnaire, digital footprint

Bibliographical note

INT=TUT-BMT,"Das, Soumya"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparison of Sintering Methods and Conductive Adhesives for Interconnections in Inkjet-Printed Flexible Electronics

Increasing demands for flexibility and stretchability for electronic devices are driving the research for novel fabrication technologies. Inkjet-printing is one of these novel electronics fabrication techniques studied and developed globally in recent years and it has some interesting benefits over traditional lithography-based techniques, mainly its additive and digital nature. Traditional manufacturing methods are mature techniques and the processes are well defined and optimized for large scale manufacturing and inkjet-printing is not going to replace the lithography as such for large scale manufacturing. Inkjet-printing does, however, enable whole new ways of electronics fabrication, such as high part-to-part customization and 3D processability, which have previously been either very challenging or even impossible.

So far research has focused mainly on inkjet-printing itself and the jetting process is understood fairly well. However, at the moment printed semiconductor materials are far inferior to traditional semiconductor components and can not enable the same level of functionality or connectivity. Hybrid systems, combining the high performance of traditional semiconductor components and benefits of inkjet-printing, are studied as a solution for fabricating high performance devices with novel fabrication techniques. Hybrid systems require the ability to attach external components to the printed structures and this integration was chosen as one of the main topic for this thesis work as it had not been studied previously and the knowledge was required for developing inkjet-printing.

This thesis analyzes inkjet-printed hybrid systems and focuses on system level integration. The work is done on interconnections including both the sintering of metallic nanoparticles as well as external component interconnections and circuit board to circuit board connections. Sintering research is focused on alternative sintering methods to traditional thermal sintering and evaluation of their usability in electronics fabrication. Electrically conductive adhesives are studied as the main method of forming external connection to components and to other circuit boards.

In the research related to this thesis alternative sintering methods were found to be suitable replacements for traditional thermal sintering with the advantages and disadvantages varying between different technologies. Laser and intense pulsed lighting were generally found to be the most promising techniques for inkjet-printed structures. External connections to traditional surface mounted components as well as other printed circuit boards were also successfully demonstrated in the related publications using electrically conductive adhesive materials. Both the electrical performance and long term reliability of the conductive adhesives were found to be inferior to solder-based interconnections but observations show that the difference is caused by the adhesive material itself, not by the use of inkjet-printing. Thus adhesives can be considered as a viable method for forming external interconnections on inkjet-printed structures.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Electronics and Communications Engineering, Research group: Laboratory for Future Electronics
Contributors: Niittynen, J.
Number of pages: 62
Publication date: 24 Apr 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3505-5
ISBN (Electronic): 978-952-15-3515-4
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1291
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Compensation of PV generator output power fluctuations with energy storage systems

Photovoltaic generators (PVG) suffer from short-term intermittency of output power. With significant penetration of PV this intermittency can lead to power systems instability and power quality problems. Energy storage systems (ESS) can be used to compensate PV power fluctuations in order to mitigate these problems. In this paper ESS behavior, control and sizing have been investigated to mitigate instabilities caused by PV power plants operating in Northern European conditions through simulations that utilize measurements from the Tampere University of Technology (TUT) Solar PV power station research plant. Continuous synchronized measurements have been recorded with the irradiance and PV module temperature sensor network with a 10 Hz sampling frequency since June 2011. The ESS capacity and power requirements are derived from the simulations for different PVG sizes and PV power ramp rate (RR) limits. The results show how both capacity and power requirements decrease as functions of the RR limit and the PVG size. Also, interesting differences have been noticed compared to similar studies done in Southern European climate, which indicate that the operational climate of the PVG can have an effect on ESS sizing.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electrical Engineering, Research area: Power engineering, Tampere University of Technology
Contributors: Schnabel, J., Valkealahti, S.
Number of pages: 5
Pages: 2177-2181
Publication date: 14 Sep 2015

Host publication information

Title of host publication: 31st European Photovoltaic Solar Energy Conference and Exhibition (31st EU PVSEC), 14– 18 September, 2015, Hamburg, Germany
ISBN (Print): 3-936338-39-6
ASJC Scopus subject areas: Energy(all)

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Competence portfolio assessment of research and development center for regional development

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Salminen, V., Kantola, J. I., Vanharanta, H.
Number of pages: 9
Pages: 701-708
Publication date: 2015

Host publication information

Title of host publication: 6th International Conference on Applied Human Factors and Ergonomics (AHFE 2015) and the Affiliated Conferences, AHFE 2015
Publisher: Elsevier

Publication series

Name: Procedia Manufacturing
Volume: 3
ISSN (Print): 2351-9789

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Complexity and Digitalisation of Cities - Challenges for Urban Planning and Design: Conference Proceedings of 13th AESOP Complexity and Planning Thematic Group Meeting 15th-16th January 2015, Tampere, Finland

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: School of Architecture, Research group: Urban Planning Theory
Contributors: Partanen, J. (ed.)
Number of pages: 226
Publication date: 2015

Publication information

Publisher: Tampere University of Technology. School of Architecture
ISBN (Electronic): 978-952-15-3711-0
Original language: English

Research output: Book/ReportAnthologyScientificpeer-review

Composite Nonlinear Feedback Control of a Chemical Reactor

This paper studies the application of composite nonlinear feedback (CNF) control for a continuous time stirred tank reactor. Inside the reactor, an exothermic chemical reaction occurs, which requires cooling when concentration is commanded from low to high conversion rate to prevent a thermal runaway. A full-state CNF controller is designed for adjusting the temperature of the cooling jacket using concentration and temperature measurements. A continuous time gain-scheduled cascade controller, as well as a model predictive controller (MPC) is also fabricated for comparison. The gain-scheduled cascade controller has a proportional-integral (PI) controller as a primary loop controller, and a P-controller as a secondary loop controller. The simulation results show that the CNF controller is able to offer the best overall tracking performance as measured by the integral-of-absolute-error (IAE) criterion. In addition, the CNF controller does not need gain-scheduling for tuning purposes; the CNF controller is capable of changing its tuning as a function of control error only.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research area: Information Systems in Automation, Research area: Dynamic Systems, Department of Automation Science and Engineering
Contributors: Pyrhönen, V., Koivisto, H.
Publication date: 18 Mar 2015

Host publication information

Title of host publication: Proceedings of AutomaatioXXI, The Industrial Revolution of Internet – From Intelligent Devices to Networked Intelligence
Place of publication: Helsinki, Finland
Publisher: Suomen Automaatioseura ry
ISBN (Electronic): 978-952-5183-46-7

Publication series

Name: SAS julkaisusarja
Publisher: Finnish Society of Automation
Volume: 44
Keywords: exothermic reaction, nonlinear control, nonlinear dynamics, cascade control

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comprehensive survey of similarity measures for ranked based location fingerprinting algorithm

Ranked Based Fingerprinting uses only ordering indices instead of actual Wi-Fi RSS values in order to make the algorithm insensitive to devices. A key component of the RBF algorithm is a similarity measure which is used to compare and find the closest ranked fingerprints. Previous papers study a few similarity measures; here we study 49 similarity measures in a test with a benchmark with publicly available indoor positioning database. For different similarity measures the positioning accuracy varies from 15.80 m to 55.22 m. The top 3 similarity measures are Lorentzian, Hamming and Jaccard. Hamming and Jaccard similarity measures have been studied in other papers while Lorenzian had not been studied with that kind of problems.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Automation and Hydraulic Engineering, Signal Processing, Research group: Positioning
Contributors: Minaev, G., Visa, A., Piche, R.
Number of pages: 4
Publication date: 2017

Host publication information

Title of host publication: Indoor Positioning and Indoor Navigation (IPIN), 2017 International Conference on
Publisher: IEEE
ISBN (Electronic): 978-1-5090-6299-7

Bibliographical note

JUFOID=72210

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Computational modelling of high-cycle fatigue using a continuum based model

In this paper a computational implementation of continuum based transversally isotropic fatigue model is described. The key idea of the continuum based HCF-model is the moving endurance surface where the movement is described by a back stress type tensor, the evolution of which is described by a rate type equation. Furthermore, damage accumulation is also governed with a rate type evolution equation. The model is implemented in the Abaqus FE-program using the user material subroutine. Two strategies to perform a fatigue analysis are compared in a standard cycling loading case. The first analysis reflects the procedure used in a standard fatigue computation. In the second analysis type the effect of evolving damage fields on fatigue life is investigated.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics
Contributors: Holopainen, S., Kouhia, R., Könnö, J., Saksala, T.
Number of pages: 4
Pages: 71-74
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the NSCM28 : 28th Nordic Seminar on Computational Mechanics, October 22 – 23, 2015, Tallinn, Estonia
ISBN (Print): 978-9949-430-95-6
ISBN (Electronic): 978-9949-430-96-3

Bibliographical note

oa 2015 Holopainen et al tarkistettu 19.10.2016 /KK

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Computational wavelength resolution for in-line lensless holography: Phase-coded diffraction patterns and wavefront group-sparsity

In-line lensless holography is considered with a random phase modulation at the object plane. The forward wavefront propagation is modelled using the Fourier transform with the angular spectrum transfer function. The multiple intensities (holograms) recorded by the sensor are random due to the random phase modulation and noisy with Poissonian noise distribution. It is shown by computational experiments that high-accuracy reconstructions can be achieved with resolution going up to the two thirds of the wavelength. With respect to the sensor pixel size it is a super-resolution with a factor of 32. The algorithm designed for optimal superresolution phase/amplitude reconstruction from Poissonian data is based on the general methodology developed for phase retrieval with a pixel-wise resolution in V. Katkovnik, "Phase retrieval from noisy data based on sparse approximation of object phase and amplitude", http://www.cs.tut.fi/∼lasip/DDT/index3.html.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Department of Photonics and Optical Information Technology, ITMO University
Contributors: Katkovnik, V., Shevkunov, I., Petrov, N. V., Egiazarian, K.
Publication date: 2017

Host publication information

Title of host publication: Digital Optical Technologies 2017
Publisher: SPIE
Article number: 1033509
ISBN (Electronic): 9781510611153

Publication series

Name: Proceedings of SPIE
Volume: 10335
ISSN (Print): 0277-786X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Keywords: Discrete optical signal processing, Image processing, Noise in imaging systems, Phase retrieval, Superresolution

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85030715279

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Computer-supported collaborative learning: Praxes in new cell-oriented configurable PC-classroom

Currently, technology-enhanced learning environments are a research hotspot in engineering education. Universities invest in modern environments equipped with the newest audiovisual hardware, computers and web-technologies. These environments support learner-centred model of education, which highlights active role of learners, learning-by-doing, and collaborative learner autonomy in a democratic atmosphere. Therefore, traditional teacher-led classrooms can be transformed to more diverse and more creative environments in which teachers and learners have relatively different roles compared with the traditional classroom.

In this paper, we present layout, construction and hardware of our newly developed technology-mediated, configurable, and cell-oriented PC-classroom, which play a key role in our teaching development. We exemplify how the classroom has helped us to improve our automation science and control engineering education. To be more specific, we have adopted the well-known concept of computer-supported collaborative learning (CSCL), which concerns how students can learn together with the help of computers. We also demonstrate how redefining and redesigning the nature of activities occurring in modern learning environments can improve the effectiveness of contact teaching, and hence, allow learning episodes to be more impactful compared with the traditional teacher-led classroom. We would like to pinpoint that redefinition and redesign have allowed us, as teachers, to take the position of a facilitating guide, or mentor, which work in close cooperation with students, and thereby, is able to strengthen the knowledge level of students through intellectual face-to-face discussion as well as through technology-supported communication.

Furthermore, our new classroom has enabled hands-on, competitive, cyber-physical attack-defence events to be conducted, which improve our automation security training. The events have invited participants from industry and academia, but most importantly, they have involved students. During the events, we have offered opportunities for students to make demonstration-of-skills to the participants from business. As a consequence, the new environment has enabled acts of openings for university-business cooperation in terms of education and recruit, free of charge. To our experience and according to student feedback, our redefined ways of conducting teaching has improved student motivation as well as increased their timely investment towards learning activities, which has eventually translated to better grades and overall satisfaction.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Information Systems in Automation
Contributors: Pyrhönen, V., Seppälä, J., Salmenperä, M.
Number of pages: 9
Publication date: 2016

Host publication information

Title of host publication: SEFI conference 2016 : Engineering Education on Top of the World: Industry University Cooperation
ISBN (Electronic): 9782873520144
ASJC Scopus subject areas: Education
Keywords: Computer-Supported Collaborative Learning, Learner-Centred Learning, Learning Environment, Teaching Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Computer vision aided navigation systems

The paper considers the possible use of computer vision systems for INS aiding. Two methods of navigation data obtaining from the image sequence are analyzed. The first method uses the features of architectural elements in indoor and urban conditions for generation of object attitude parameters. The second method is based on extraction of general features in the image and is more widely applied. Besides the orientation parameters, the second method estimates the object displacement, and thus can be used as visual odometry technique. The described algorithms can be used to develop small-sized MEMS navigation systems efficiently operating in urban conditions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research group: Positioning, ITMO University
Contributors: Davidson, P., Merkulova, I.
Number of pages: 3
Pages: 560-562
Publication date: 2016

Host publication information

Title of host publication: 23rd Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2016 - Proceedings
Publisher: State Research Center of the Russian Federation
ISBN (Electronic): 9785919950370
ASJC Scopus subject areas: Computer Networks and Communications, Signal Processing, Electrical and Electronic Engineering, Information Systems
Keywords: Camera, Computer vision, Data fusion, Image processing, Inertial system, Orientation
Source: Scopus
Source ID: 84979499890

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Concentration and composition gradients of exhaust and non-exhaust particles near a major road

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Physics, Research area: Aerosol Physics, Helsinki Region Environmental Services Authority (HSY), Department of Environmental Sciences, Helsinki University, Metropolia University of Applied Science, Metropolia University of Applied Sciences, Atmospheric Composition Research, Finnish Meteorological Institute
Contributors: Niemi, J. V., Saarikoski, S., Pirjola, L., Taimisto, P., Pulkkinen, A., Yli-Tuomi, T., Lanki, T., Kousa, A., Enroth, J., Kuuluvainen, H., Rönkkö, T., Hillamo, R.
Publication date: 2015

Host publication information

Title of host publication: EAC 2015, European Aerosol Conference, 6-11 September, 2015, Milan, Italy

Bibliographical note

ISBN kysytty, HO.
Ei ole, HO.

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Consensus building in the pre-design phase of building projects

Building projects are unique manoeuvres in which numerous participants who possess different skills work together to complete various tasks. Working processes vary in complexity from simple to very complex. Although the building construction sector has traditional ways of structuring projects, project management professionals are continuously seek new process models and ways to cooperate between people and project participants. This paper focuses on processes in the pre-planning phase of a building project and is based on exploratory study where the conceptual and empirical literature about construction processes and decision-making were reviewed. Over thirty existent models were identified and thirteen of these models, which take a decision making into account, were more closely studied. In addition, decision-making models in other fields were surveyed. Using a hermeneutic cycle approach, the aim of this paper is to investigate a preferable model for the pre-planning phase of construction projects that can produce the main objectives, which is to best serve the end user and the project as a whole. As a final result a new model in the case of the pre-design phase of the building process is introduced and discussed. This paper asks what we have learnt from these foci.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector, Research group: Capacity Development of Water and Environmental Services CADWES, Research area: Construction Management and Economics, Research group: Real estate development
Contributors: Keinänen, M., Uotila, U., Sorri, J., Teriö, O., Kähkönen, K.
Number of pages: 12
Pages: 561-572
Publication date: 2016

Host publication information

Title of host publication: WBC16 Proceedings of the CIB World Building Congress 2016 Volume II : Environmental Opportunties and challenges, Constructing commitment and acknowledging human experiences
Volume: Volume II
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Prins, M., Wamelink, H., Giddings, B., Ku, K., Feenstra, M.
ISBN (Electronic): 978-952-15-3741-7

Publication series

Name: Tampere University of Technology. Department of Civil Engineering. Construction Management and Economics.
ISSN (Print): 1797-8904
Keywords: consensus building, target setting, decision-making, construction project management, pre-design phase

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Constrained Long-Horizon Direct Model Predictive Control for Synchronous Reluctance Motor Drives

A finite control set model predictive control strategy for the control of the stator currents of a synchronous reluctance motor driven by a three-level neutral point clamped inverter is presented in this paper. The presented algorithm minimizes the stator current distortions while operating the drive system at switching frequencies of a few hundred Hertz. Moreover, the power electronic converter is protected by overcurrents and/or overvoltages owing to a hard constraint imposed on the stator currents. To efficiently solve the underlying integer nonlinear optimization problem a sphere decoding algorithm serves as optimizer. To this end, a numerical calculation of the unconstrained solution of the optimization problem is proposed, along with modifications in the algorithm proposed in [1] so as to meet the above-mentioned control objectives. Simulation results show the effectiveness of the proposed control algorithm.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electrical Energy Engineering, Research group: Power electronics, Universita degli Studi di Padova, Italy, Technische Universitat Munchen
Contributors: Ortombina, L., Liegmann, E., Karamanakos, P., Tinazzi, F., Zigliotto, M., Kennel, R.
Number of pages: 8
Publication date: 10 Sep 2018

Host publication information

Title of host publication: 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics, COMPEL 2018
Publisher: IEEE
Article number: 8460173
ISBN (Print): 9781538655412
ASJC Scopus subject areas: Modelling and Simulation, Energy Engineering and Power Technology, Electrical and Electronic Engineering, Control and Optimization

Bibliographical note

JUFOID=79370

Source: Scopus
Source ID: 85054503298

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Consumer acceptance in new service innovation: Enhancing consumer durables with new product-related services.

Manufacturing companies are increasingly offering services to gain benefits in the competitive markets but also to reach closer contact with their customers. However, customer acceptance of the new services defines whether the manufacturers succeed in their service launches or if the investments have been misspent. The importance of customer acceptance has been noticed widely in the previous literature but the research has not really extended to the domain of product-related consumer services. This paper contributes to this literature by discussing consumer acceptance of a product-related service but also acceptance of a manufacturer as a service provider. The focus is on a service enhancing consumer durable provided by a manufacturer through retailer network. The data was collected in two phases; preliminary data by
interviews realized in one country and the actual data set by questionnaire carried out in two other countries. This study shows that the customer acceptance of product-related service is not self-evident. Considering customer’s earlier service usage, brand loyalty, and trialability of the service innovation are important in service acceptance. Surprisingly, respondent’s age and gender affected only rarely customers’ perceptions and wishes for services from manufacturers even though these factors have been found important in some other studies. As a conclusion, manufacturers introducing service innovations need to strive to enhance consumers’ service acceptance by
providing information about the service for potential customers, facilitating service deployment and use as well as ensuring smooth service implementation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Vaittinen, E., Nenonen, S.
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 22nd Innovation Product Development Management Conference (IPDMC)

Publication series

Name: International Product Development Management Conference
ISSN (Print): 1998-7374

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Consumers' Views on Eco-Friendliness as a Dimension of a High-Tech Brand

High-tech companies are facing the need to perform deeper analysis of how consumers view the eco-friendliness of their brands, in order to create green product and marketing strategies. The focus of this paper is to study whether consumers associate eco-friendliness with high-tech brands, and what kinds of consumers are most pro-environmental based on demographics. The key finding of this research is that consumers consider also eco‐friendly aspects when reflecting on high‐tech brands on four dimensions also used to measure general brand experience: the sensory, affective, behavioral and intellectual dimensions [1]. Demographically, women consider eco‐friendliness more in
association with high‐tech brands than men across all of the four brand experience dimensions. In addition, mature consumers consider on the intellectual and sensory brand dimensions more eco‐friendly aspects than young consumers. There are no statistically significant differences in the responses based on the educational background of the respondents.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Research group: Center for Innovation and Technology Research
Contributors: Saari, U., Mäkinen, S., Alinikula, P.
Number of pages: 8
Pages: 1-8
Publication date: 17 Nov 2014

Host publication information

Title of host publication: Going Green - CARE INNOVATION 2014
Publisher: SAT Austrian Society for Systems Engineering and Automation
Article number: 067

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Contact analysis included in a 3D FEA of tube splices

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Metal and Light-wight structures
Contributors: Perttola, H., Ronni, H., Heinisuo, M.
Publication date: 2014

Host publication information

Title of host publication: Eurosteel 2014 7th European conference on steel and composite structures
ISBN (Print): 978-92-9147-121-8

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Continuum approach for modeling fatigue in amorphous glassy polymers. Applications to the investigation of damage mechanisms in polycarbonate

In this study, we attempt to elucidate how the various micro-mechanisms con-
tribute to the fatigue development in an amorphous glassy matrix. To investi-
gate this issue, we propose an approach suitable for modeling fatigue in amor-
phous polymers. The studies are based on finite element analyses of a dogbone-shaped test specimen featuring plastic instabilities and localization behavior.
Also discussed is the development of fatigue damage in toughened polymers, in
view of dispersed particles. The results show that the fatigue damage initiates
at the sites following closely the localization of the plastic deformations or in-
stabilities, while the concentrated regions of hydrostatic stress were essentially
different. The more rigid the inclusions are, the more intensive the damage
growth in the ligaments between the inclusions, while the rigidity has no im-
pact on the location of the matrix damage. On the basis of the results, the
micro-mechanism which will trigger fatigue damage is discussed.

General information

Publication status: Published
Organisations: Department of Mechanical Engineering and Industrial Systems
Contributors: Holopainen, S., Kouhia, R.
Publication date: 28 Oct 2016
Peer-reviewed: Unknown
Event: 

Research output: Other conference contributionPaper, poster or abstractScientific

Control of Electric Vehicle Charging in Domestic Real Estates as Part of Demand Response Functionality

The paper discusses an electric vehicle (EV) charging control method enabling flexible high-power charging in domestic real estates. In the method, the charging current(s) of an EV is adjusted in accordance of the free capacity between maximum current limit and the non-EV load current(s). This kind of harging is simulated using long-lasting electricity consumption measurements and is also demonstrated with a real commercial charging station and an EV. The
simulations and the real world demonstration show that the method works well and is very flexible. However, if it is widely used, its impacts on distribution grids are not favorable from distribution system operator (DSO) point-of-view. Power based distribution tariffs, which are nowadays under active consideration by Finnish DSOs, could cope with this problem.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electrical Engineering, Research area: Power engineering, Lappeenranta University of Technology
Contributors: Rautiainen, A., Lummi, K., Järventausta, P., Tikka, V., Lana, A.
Publication date: 2016

Host publication information

Title of host publication: Cired Workshop 2016
Article number: 0240
ISBN (Electronic): 978-1-78561-202-2

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Convolutional Recurrent Neural Networks for Rare Sound Event Detection

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Audio research group - ARG
Contributors: Cakir, E., Virtanen, T.
Pages: 27-31
Publication date: 2017

Host publication information

Title of host publication: Proceedings of the Detection and Classification of Acoustic Scenes and Events 2017 Workshop (DCASE2017)
Publisher: Tampere University of Technology. Laboratory of Signal Processing
ISBN (Electronic): 978-952-15-4042-4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Coopetition and company performance

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: University of Vaasa (UVA), University of Vaasa
Contributors: Helander, N., Vesalainen, J., Juha, P.
Publication date: 2 Sep 2015

Host publication information

Title of host publication: IMP 2015 Conference

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Core Project Team As a Management Entity for Construction Projects

The complexity of constructed facilities and the high degree of specialisation in design and construction generates very fragmented working environment for the construction project. Construction project organisations are built up from the units of organisations and they have arranged rules and procedures about how practicalities are to be done. A current perception of construction management is widely built around power, authority, and task orientation. This is resulting from the traditional focus of the construction industry on the technical and managerial features of construction projects. Organisations of construction projects vary substantially in their structure and this structure has considerable consequences to outcomes. Therefore, project management professionals continuously seek and establish new organisational and management structures and linkages to facilitate imperative cooperation between people and project partners. New understanding and amendments are broadening the content of construction project management and have provided new insights for successful construction operations. This paper is based on research according to this continuum by having focus on the appearances of management entity of a new kind, its significance and roles as a part of construction project management. The paper sought to summarize this literature and the survey study by focusing on the project management entity “core project team”, later “core team”. Drawing from this inclusive, the phenomenon of core team, the authors approach the field through six attributes, which have been selected to describe the new way for organising project management.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Digitalization in the real estate and construction sector
Contributors: Keinänen, M., Kähkönen, K.
Number of pages: 10
Pages: 208-217
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: In_bo: Ricerche e progetti per il territorio, la citta e l'architettura. Construction Management
Volume: 9
Issue number: 13
ISSN (Print): 2036-1602
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering
Keywords: Core project team, Core team, Construction management, Construction project, Construction teams

Research output: Contribution to journalArticleScientificpeer-review

Cost- and time-effective sewing patterns for embroidered passive UHF RFID tags

Embroidery is an efficient method for the fabrication of textile antennas. We studied the effects of reducing the amount of conductive thread to achieve savings in material costs and the effects of the sewing pattern on the wireless performance of embroidered passive UHF RFID tags on two different fabric substrates. The antennas were sewed on cotton and polyamide fabrics, the ICs were attached to the embroidered antennas with a conductive adhesive, and the wireless performance of the ready-made textile RFID tags was evaluated through measurements. The fabric parameters were found to have a major effect on the tag performance. Based on our results, significant amounts of time and conductive yarn can be saved in the embroidery of RFID tag antennas by only partially sewing the tag antenna.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: BioMediTech, Faculty of Biomedical Sciences and Engineering, Research group: Wireless Identification and Sensing Systems Research Group
Contributors: Brechet, N., Ginestet, G., Moradi, E., Ukkonen, L., Torres, J., Björninen, T., Virkki, J.
Pages: 30-33
Publication date: 1 Mar 2017

Host publication information

Title of host publication: Proceedings of IEEE 2017 International Workshop on Antenna Technology
Publisher: IEEE
ISBN (Electronic): 978-1-5090-5176-2

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Creating sustainable value in manufacturing operations: the role of an external service provider

Manufacturing companies need to fulfill sustainability requirements in their operations. Previous research has not covered external service providers’ sustainability-oriented cooperation with manufacturing firms sufficiently. The purpose is to develop new knowledge on ways to create sustainable value as part of manufacturing operations, particularly in cooperation with an external service provider. We conducted a qualitative study with two companies and mapped the activities in sustainable value creation. The results reveal a strategic approach to sustainable value, creation of sustainability by continuous improvement and development projects, and enhanced sustainable value creation through an industrial symbiosis with the external service provider.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Martinsuo, M., Kivilä, J., Heikkilä, J.
Publication date: 2015

Host publication information

Title of host publication: 22nd EurOMA Conference : Operations management for sustainable competitiveness
Place of publication: Switzerland
Publisher: European Operations Management Association
Keywords: Sustainability, Manufacturing, Service providers

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Cross-Cultural Design of Mobile Mathematics Learning Service for South African Schools

In the era of mobile devices and services, researchers in the educational domain have been interested in how to support learning with mobile technology in both local and global contexts. Recent human-computer interaction (HCI) research in the educational domain has particularly focused on how to develop mobile learning services and how to evaluate the learning outcomes. However, learning occurs in a local cultural context and the impact of culturally sensitive issues of the design of mobile learning needs more attention. We studied mobile mathematics learning -service in a longitudinal research with over 30 South African schools during three years. Our aim was to understand culturally dependent issues which need to be taken into consideration in the design of mobile learning services. We found subjective and objective culturally dependent issues in the content, context, infrastructure and technology of mobile learning and therefore, subjects to cross-cultural research. In conclusion, we argue that localization enhances the user experience and therefore support learning.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Pervasive Computing, Research area: User experience, University of Tampere
Contributors: Vainio, T., Walsh, T., Varsaluoma, J.
Number of pages: 12
Pages: 81-93
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: IADIS International Journal on WWW/Internet
Volume: 12
Issue number: 1
ISSN (Print): 1645-7641
Original language: English
Keywords: Cross-Cultural Design, Mobile Learning, Cultural Context, Subjective and Objective Culture

Bibliographical note

EXT="Vainio, Teija"

Research output: Contribution to journalArticleScientificpeer-review

Crossing Boundaries for Learning – through Technology and Human Efforts

General information

Publication status: Published
MoE publication type: C1 Separate scientific books
Organisations: University of Helsinki
Contributors: Niemi, H., Multisilta, J., Löfström, E.
Publication date: 2014

Publication information

Publisher: CICERO Learning Network, University of Helsinki
ISBN (Print): 978-952-10-9878-9
Original language: Undefined/Unknown
Keywords: 516 Educational sciences
Source: Bibtex
Source ID: urn:8ca22e584c9a353efda0aea3cc9fbf1d

Research output: Book/ReportBookScientificpeer-review

Crowdsourcing in Business-to-Business Markets: A Value Creation and Business Model Perspective

The foundation for the analysis of this chapter builds on the value creation model of Amit and Zott (2001), where they studied the importance of sources of value creation in the field of electronic business. This model was chosen for the purposes of this study because it is developed from fundamental value creation models and dominates concerning value creation in e-business, of which crowdsourcing by utilizing social media tools represents also. Moreover, Amit and Zott’s business model (2001, p. 511), which focuses on e-business for B2C companies, can be adapted for all virtual markets in general, and also applies to B2B companies (2006, p. 20). Most importantly, the model enables to analyze the relations between value creation and business model. In next, the theoretical background of value creation is opened up especially in the context of business-to-business markets, and furthermore, the model of Amit and Zott (2001) is presented. Lastly, crowdsourcing in business-to-business markets as the research context of the present study is discussed.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Information Management and Logistics, Research group: Novi, Managing digital industrial transformation (mDIT)
Contributors: Bernhardt, J., Helander, N., Jussila, J., Kärkkäinen, H.
Number of pages: 11
Pages: 933-943
Publication date: Apr 2016

Host publication information

Title of host publication: Encyclopedia of E-Commerce Development, Implementation, and Management
Place of publication: United States
Publisher: IGI Global
Article number: 66
ISBN (Print): 978-1-4666-9787-4

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

CueSense: a Wearable Proximity-Aware Display Enhancing Encounters

Wearable technology has been envisioned, amongst other things, to enhance face-to-face social interaction. For example, the visibility of wearable devices to other people (e.g. a wearable display) could augment the wearer’s appearance by displaying public and socially relevant information about them. Such information could increase nearby people’s awareness of the wearer, thus serve as tickets-to-talk and, ideally, enhance their first encounters. We present the design of CueSense, a wearable displays that shows textual content from the wearer’s social media profiles, determined by the level of proximity to another user and match-making between their contents. We report the findings from a preliminary user study with 18 participants, followed by discussion as well as ideas for future research and further refinement of the concept.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: User experience, Augmented Human Activities (AHA), Tampere University of Technology
Contributors: Jarusriboonchai, P., Olsson, T., Prabhu, V., Väänänen-Vainio-Mattila, K.
Number of pages: 6
Publication date: 2015

Host publication information

Title of host publication:  CHI EA '15 Proceedings of the 33rd Annual ACM Conference Extended Abstracts on Human Factors in Computing Systems
Publisher: ACM
ISBN (Print): 978-1-4503-3146-3

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Culture-Aware Web Information System Development

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Software Engineering and Intelligent Systems, Christian-Albrechts-Universität zu Kiel
Contributors: Jaakkola, H., Thalheim, B.
Number of pages: 18
Pages: 121-138
Publication date: 2015

Host publication information

Title of host publication: 25th International Conference on Information Modelling and Knowledge Bases EJC 2015 June 9-12, 2015, Maribor, Slovenia
Place of publication: Maribor
Publisher: University of Maribor, Faculty of Electrical Engineering and Computer Science
Editors: Welzer, T., Hölbl, M., Kiyoki, Y., Thalheim, B., Jaakkola, H.
ISBN (Electronic): 978-961-248-486-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Culture-Aware Web Information Systems in Dependence of Context

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing, Christian-Albrechts-University Kiel
Contributors: Jaakkola, H., Thalheim, B.
Pages: 309-331
Publication date: Jun 2017

Host publication information

Title of host publication: The Proceedings of the 27th International Conference on Information Modelling and Knowledge Bases
Publisher: Sirindhorn International Institute of Technology, Thammasat University, Thailand
Editors: Sornlertlamvanich, V., Chawakitchareon, P., Hansuebsai, A., Koopipat, C., Kiyoki, Y., Jaakkola, H., Thalheim, B., Yoshida, N.
ISBN (Electronic): 978-616-407-165-0

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Customer lifetime value in manufacturing services

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Cost Management Center
Contributors: Stormi, K., Laine, T., Suomala, P.
Publication date: 15 Jun 2016

Host publication information

Title of host publication: Proceedings of the Manufacturing Accounting Research Conference 2016 : Lisbon, Portugal, June 15-17, 2016
Place of publication: Belgium
Publisher: European Institute for Advanced Studies in Management EIASM

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Customer Perceived Value - A Key in Marketing of Integrated Solutions

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Knowledge and Learning Research Center, Research group: Novi
Contributors: Helander, N., Sillanpää, V., Vuori, V., Uusitalo, O.
Pages: 37-42
Publication date: 3 Jun 2017

Host publication information

Title of host publication: The 5th International Conference on Strategic Innovative Marketing., At Athens, Greece, Volume: 5 : September 23-26, 2016
Publisher: Springer
Editors: Kavoura, A., Sakas, D., Tomaras, P.
ISBN (Electronic): 978-3-319-56288-9

Publication series

Name: Springer Proceedings in Business and Economics
ISSN (Print): 2198-7246

Bibliographical note

jufoid=84314

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Customers’ conscious experience in a coffee shop

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Vanharanta, H., Kantola, J., Seikola, S.
Number of pages: 8
Pages: 618-625
Publication date: 2015

Host publication information

Title of host publication: 6th International Conference on Applied Human Factors and Ergonomics (AHFE 2015) and the Affiliated Conferences, AHFE 2015
Publisher: Elsevier

Publication series

Name: Procedia Manufacturing
Volume: 3
ISSN (Print): 2351-9789

Bibliographical note

EXT="Kantola, Jussi"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Customer value management framework for supply chains

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics
Contributors: Ala-Maakala, M., Liimatainen, H.
Number of pages: 10
Pages: 447-456
Publication date: 4 Jul 2016

Host publication information

Title of host publication: The proceedings of 21st international symposium on logistics (ISL 2016) : Sustainable transport and supply chain innovation, Kaohsiung, Taiwan 3-6 July 2016
Editor: Pawar, K.
ISBN (Electronic): 9780853583172

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Customized service solutions for project business

Project-based firms are supplementing their technology-based offerings with services, to build continuity into their customer relationships and add customer value. Project-related services can be offered using multiple business model options. Where different customers may require customized service solutions, suppliers need to consider whether and how they can customize service-related offerings efficiently. The purpose of this study to increase understanding on customization and the use of customer information in project-related service design and delivery processes. We employed a qualitative multiple-case research design, to explore the customization and use of customer information in project deliveries. The results show that companies engage in additive and subtractive customization in their project-related services, despite their increasing pursuit of standardization. They also engage in resource intensive search for customer information, while remote monitoring is foreseen as a strong option for the future. The results illustrate the need for different approaches towards customization for different types of services and during the different stages of the project life cycle.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Martinsuo, M., Momeni, K.
Number of pages: 21
Publication date: Aug 2015

Host publication information

Title of host publication: 23rd Nordic Academy of Management Conference 2015
Publisher: Nordic Academy of Management
Keywords: project business, services, customization, remote monitoring system

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

D2D communications for mobile devices: Technology overview and prototype implementation

The mobile devices of today evolve towards offering uninterrupted connectivity while attempting to achieve untethered mobility of their users. Further technological advances in hardware often lead to an increased data consumption. Combining these two factors, we notice that the data rates on the current Internet connections are starting to lag behind. Ultimately, we observe a mismatch between the data transfer rate requirements and the actual throughput availability. In this paper, we utilize direct links between proximate devices to help offload the large amounts of user-originated data from the conventional cellular links. The paper explores the implementation possibilities of this technology on the consumer Android devices, as well as substantiates our application development choices. The proposed approach employs the infrastructure-based connections for coordination, while most data transfers happen over the device-to-device links. This allows the developers to utilize our data offloading platform for other proximate applications.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Emerging Technologies for Nano-Bio-Info-Cogno, Department of Pervasive Computing, Research area: Software engineering
Contributors: Devos, M., Ometov, A., Mäkitalo, N., Aaltonen, T., Andreev, S., Koucheryavy, Y.
Pages: 124-129
Publication date: 5 Dec 2016

Host publication information

Title of host publication: 8th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)
Publisher: IEEE
ISBN (Print): 978-1-4673-8819-1
ISBN (Electronic): 978-1-4673-8818-4
Keywords: Device-to-device communication, Data transfer, Internet, Mobile communication, IEEE 802.11 Standard, Mobile handsets, Operating systems

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Data-Driven Approach for Analysis of Performance Indices in Mobile Work Machines

This paper presents a data-driven approach for the analysis of performance indices in mobile work machines. Performance analysis and optimisation of mobile work machines has become increasingly important in recent years. The mobile work machine optimisation is performed based on performance measurements. One of the most interesting and potential approach for improving the quality of the performance analysis is the utilisation of Big Data and data-driven analysis methods, such as machine learning. This study utilises a machine learning algorithm, Classification and Regression Trees (CART), in the performance analysis of the mobile work machines. The most significant benefit of the presented method is that it provides a statistical reference of the machine performance for the operators. The method enables operators to compare performance against reference fleet of machines working in similar operating conditions. This feature can lead to more informative and reliable interpretations and analysis of the performance values. The results of this paper demonstrate how the presented method was used to analyse the performance of a mobile work machine fleet.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Dynamic Systems, Research area: Measurement Technology and Process Control, Tampere University of Technology
Contributors: Väyrynen, T., Peltokangas, S., Anttila, E., Vilkko, M.
Number of pages: 7
Pages: 81-86
Publication date: 19 Jul 2015

Host publication information

Title of host publication: DATA ANALYTICS 2015, The Fourth International Conference on Data Analytics
Editors: Klemas, T., Chan, S.
ISBN (Electronic): 978-1-61208-423-7

Bibliographical note

AUX=ase,"Anttila, Eero"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Data including GROMACS input files for atomistic molecular dynamics simulations of mixed, asymmetric bilayers including molecular topologies, equilibrated structures, and force field for lipids compatible with OPLS-AA parameters

In this Data in Brief article we provide a data package of GROMACS input files for atomistic molecular dynamics simulations of multicomponent, asymmetric lipid bilayers using the OPLS-AA force field. These data include 14 model bilayers composed of 8 different lipid molecules. The lipids present in these models are: cholesterol (CHOL), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylcholine (POPC), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylethanolamine (POPE), 1-stearoyl-2-oleoyl-sn-glycero-3-phosphatidyl-ethanolamine (SOPE), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylserine (POPS), 1-stearoyl-2-oleoyl-sn-glycero-3-phosphatidylserine (SOPS), N-palmitoyl-. D-erythro-sphingosyl-phosphatidylcholine (SM16), and N-lignoceroyl-. D-erythro-sphingosyl-phosphatidylcholine (SM24). The bilayers[U+05F3] compositions are based on lipidomic studies of PC-3 prostate cancer cells and exosomes discussed in Llorente et al. (2013) [1], showing an increase in the section of long-tail lipid species (SOPS, SOPE, and SM24) in the exosomes. Former knowledge about lipid asymmetry in cell membranes was accounted for in the models, meaning that the model of the inner leaflet is composed of a mixture of PC, PS, PE, and cholesterol, while the extracellular leaflet is composed of SM, PC and cholesterol discussed in Van Meer et al. (2008) [2]. The provided data include lipids' topologies, equilibrated structures of asymmetric bilayers, all force field parameters, and input files with parameters describing simulation conditions (md.mdp). The data is associated with the research article "Interdigitation of Long-Chain Sphingomyelin Induces Coupling of Membrane Leaflets in a Cholesterol Dependent Manner" (Róg et al., 2016) [3].

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Physics, Research area: Computational Physics, Research group: Biological Physics and Soft Matter, University of Helsinki, University of Limerick, University of Oslo, Zora Biosciences Oy, MEMPHYS - Centre for Biomembrane Physics, University of Southern Denmark
Contributors: Róg, T., Orłowski, A., Llorente, A., Skotland, T., Sylvänne, T., Kauhanen, D., Ekroos, K., Sandvig, K., Vattulainen, I.
Number of pages: 4
Pages: 1171-1174
Publication date: 1 Jun 2016
Peer-reviewed: Yes

Publication information

Journal: Data in Brief
Volume: 7
ISSN (Print): 2352-3409
Ratings: 
  • Scopus rating (2016): CiteScore 0.5 SJR 0.226 SNIP 0.213
Original language: English
Keywords: Force field, GROMACS, Lipid, Lipidomics, Molecular dynamics simulations, Topology
Source: Scopus
Source ID: 84962909567

Research output: Contribution to journalArticleScientificpeer-review

DCASE 2016 Acoustic Scene Classification Using Convolutional Neural Networks

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Audio research group
Contributors: Valenti, M., Diment, A., Parascandolo, G., Squartini, S., Virtanen, T.
Publication date: 1 Sep 2016

Host publication information

Title of host publication: Proceedings of the Detection and Classification of Acoustic Scenes and Events 2016 Workshop (DCASE2016)
Publisher: Tampere University of Technology. Department of Signal Processing
ISBN (Electronic): 978-952-15-3807-0
Keywords: Acoustic scene classification, convolutional neural networks, DCASE, computational audio processing
Source: Bibtex
Source ID: urn:c2fdc060aad74381513299d25e4a3052

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Decision making on sustainability in product development projects

Companies use various evaluation and decision making criteria in their product development projects, to ensure the selection of the right projects to their project portfolio. Recently, sustainability has become an increasingly important decision parameter in companies, but it has not, yet, been studied sufficiently as part of decision making in product development projects. This study pursues increased understanding on the ways in which companies can embed sustainability into their decision making and information search. We employed a qualitative, interview-based research design with three environmentally oriented companies and studied their practices of sustainability-related decision making in projects. The results map factors relevant in sustainability-based decision making particularly concerning the product development task, decision makers, decision elicitation and decision aggregation. Sustainability-orientation in decision making particularly reveals internal information processes, decision makers’ different incentives, cost saving orientation and relationships between different project evaluation criteria as relevant factors. The paper contributes by supplementing a generic framework of relevant factors in product development decision making with specifics in sustainability-based decision making.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Martinsuo, M., Arvio, I.
Publication date: Jun 2015

Host publication information

Title of host publication: 15th Annual Conference of EURAM European Academy of Management : EURAM 2015
Place of publication: Warsaw
Publisher: European Academy of Management, EURAM
ISBN (Print): 9788389437600

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Defining product end-of-life strategies in new product development.

New product development is about creating new offerings to the market and new business for the supplier. At the same time, it needs to consider the end-of-life options for the product, due to increasing legal and regulatory requirements towards eco-friendly product designs. Even if sustainability has become a relevant concern in product development, previous research does not sufficiently cover how end-of-life strategies can be taken into account in new product development processes. This study explores the ways in which environmentally conscious manufacturing firms consider end-of-life strategies in their product development processes. A pre-study with two companies and their external service provider is reported, covering the different practices for identifying end-of-life options and factors relevant in considering product end-of-life strategies during new product development. The results open up avenues for focused studies on the front end of innovation that is identified as the crucial phase for initiating material choices and other end-of-life considerations.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Martinsuo, M., Sukanen, I., Kivilä, J.
Number of pages: 16
Publication date: Aug 2015

Host publication information

Title of host publication: 23rd Nordic Academy of Management Conference NFF 2015- Business in society : NFF 2015
Publisher: Nordic Academy of Management
Keywords: product end-of-life, end-of-life strategy, product development, sustainability

Bibliographical note

AUX=tta,"Sukanen, Ilmari"

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Demolished buildings: Empirical evidence on types, ages and construction materials

Studies have found that from the ecological perspective, preservation of existing buildings is usually more sustainable than demolition and new construction. Knowledge about the characteristics of demolished buildings could help to promote renovation of buildings and to advance more sustainable management of building stocks, but so far the acquisition of comprehensive data has posed an immense challenge for research. Due to the lack of empirical evidence, the current understanding is largely based on theorizing. To participate in bridging this gap of knowledge, the current study takes advantage of data extracted from the Finnish Building and Dwelling Register. This data, which encompass all buildings demolished in Finland between 2000 and 2012 (50 818 buildings), are utilized to investigate the ages, decades of origin and construction materials and methods of demolished buildings by building types in 11 different categories from residential to non-residential. The results show that buildings are being demolished after remarkably short service lives. On average, the demolished buildings were only 51 years old — a service life that is considered as appropriate for temporary structures in the current design guidance. Furthermore, prefabricated buildings reached lives around 20 years, which is clearly less than with in situ built buildings. The average lives of buildings made of different materials were as follows: 54 years (timber buildings), 50 years (brick buildings), 40 years (concrete buildings) and 19 years (steel buildings). A comparison to statistics covering the existing stock showed that demolition is typically underrepresented in the youngest cohorts and overrepresented in older cohorts.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: School of Architecture, Research group: Built Environment in Transition
Contributors: Huuhka, S.
Number of pages: 8
Pages: 1105-1112
Publication date: 22 Jun 2016

Host publication information

Title of host publication: CESB16 - Central Europe towards Sustainable Building 2016 : Innovations for Sustainable Future, June 22-24, 2016, Prague
Place of publication: Prague
Publisher: Czech Technical University in Prague
Editors: Hajek, P., Tywoniak, J., Lupisek, A., Sojkova, K.
ISBN (Print): 978-80-271-0248-8
ISBN (Electronic): 978-80-271-0248-8

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Demolition Rates of Buildings with Different Functions and Construction Materials

Obsolescence of buildings is a complex phenomenon. Previous research has found that demolition of buildings is primarily determined by behavioural aspects, amongst which is the use of the building. At the same time, service life design of buildings keeps focusing strongly on physical factors, such as the durability of materials. This study intends to shed light on the relationship of the building’s function and material by investigating demolition rates of Finnish buildings that are made of different materials (timber, concrete, bricks, steel) and that have different functions (10 categories, both residential and non-residential). The study uses demolition data from the Finnish Building and Dwelling Register (50 818 buildings – all buildings demolished between 2000 and 2012) and statistical data on the composition of the entire building stock. According to the results, the building type seems to be more decisive than the material. The highest loss rates take place amongst warehouse buildings.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: School of Architecture, Research group: Built Environment in Transition
Contributors: Huuhka, S.
Number of pages: 7
Pages: 301-307
Publication date: 21 Jun 2016

Host publication information

Title of host publication: YRSB16 - iiSBE Forum of Young Researchers in Sustainable Building 2016 : Innovations for Sustainable Future June 21, 2016, Prague
Place of publication: Prague
Publisher: Czech Technical University in Prague
Editors: Zelezna, J., Hajek, P., Tywoniak, J., Lupisek, A., Sojkova, K.
ISBN (Electronic): 978-80-01-05979-1

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Design: A Key Stage of Product Lifecycle

DESIGN\nappears to be a key and critical stage of product lifecycle. Different models have been introduced in previous research to describe the conceptual design process. The RFBS model is one of them extending and deepening the existing FBS models. A previous paper was presenting the model and assuming the possible execution of the process tasks automatically. The present paper provides an overview of the progresses that have been made in this direction during the past years. The model-driven engineering philosophy underlying the RFBS model of knowledge is concretely exemplified in this paper. The implementation through ontology and language such as SysML that was part of the model-driven engineering philosophy is concretely described in this paper in form of computer-aided tools dedicated to the conceptual design stages.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Intelligent dexterity for secure networked infrastructure and applications (IDSNIA), Aalto Univ, Aalto University, Aalto Univ Finland, Dept Engn Design & Prod, Sch Engn
Contributors: Bernard, A., Coatanea, E., Christophe, F., Laroche, F.
Number of pages: 7
Pages: 3-9
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Procedia CIRP
Volume: 21
ISSN (Print): 2212-8271
Ratings: 
  • Scopus rating (2014): SJR 0.755 SNIP 1.4
Original language: English
Source: Mendeley
Source ID: c917d102-f71c-324d-bf73-70ffe40d606b

Research output: Contribution to journalArticleScientificpeer-review

Design and simulation of a thermal flow sensor for gravity-driven microfluidic applications

Gravity-driven flow is an attractive approach to develop simpler microfluidic systems. Because clogged microchannels could easily lead to fatal operational failures, it is crucial to monitor flow rate in these systems. Therefore, we propose here for the first time a numerical model that combines a calorimetric flow sensor and a gravity-driven system. With the validated model, we studied the flow behavior in a gravity-driven system. Furthermore, we were able to improve the sensitivity of the measurement based on simulation results. This demonstrates, how the model could be used as an effective optimization tool in the gravity-driven system including calorimetric flow measurement.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Microsystems, Research area: Measurement Technology and Process Control
Contributors: Mäki, A., Kontunen, A., Ryynänen, T., Verho, J., Kreutzer, J., Lekkala, J., Kallio, P.
Number of pages: 5
Pages: 125-129
Publication date: 2016

Host publication information

Title of host publication: IEEE 11th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)
Publisher: IEEE
ISBN (Electronic): 978-1-5090-1947-2
Keywords: Atmospheric modeling;Heating;Liquids;Microchannels;Reservoirs;Temperature measurement;Temperature sensors;calorimetric flow sensor;gravity-driven flow;modeling;numerical simulation

Bibliographical note

INT=ase,"Kontunen, Anton"

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Detailed analysis of laser-induced breakdown spectroscopy of single particles using electrodynamic balance trapping

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Physics, Research area: Optics, Research area: Aerosol Physics, Research group: Applied Optics
Contributors: Järvinen, S. T., Saari, S., Keskinen, J., Toivonen, J.
Pages: CH_7_5
Publication date: 2015

Host publication information

Title of host publication: The European Conference on Lasers and Electro-Optics 2015
Publisher: Optical Society of America
ISBN (Print): 978-1-4673-7475-0
Source: Bibtex
Source ID: urn:6a7f30acd7f36662c9eb556c444f9d16

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Detection and Assessment of Sleep-Disordered Breathing with Special Interest of Prolonged Partial Obstruction

Sleep-disordered breathing (SDB) has become more common and puts more strain on public health services than ever before. Obstructive sleep apnea (OSA) and its health consequences such as different cardiovascular diseases are nowadays well recognized. In addition to OSA, attention has recently been paid to another SDB; prolonged partial obstruction. However, it is often undiagnosed and easily left untreated because of the low number of respiratory events during polysomnography recording. This patient group has found to present with more atypical subjective symptoms than OSA patients.

Polysomnography (PSG) is considered to be the gold standard in reference methods in SDB diagnostics. PSG is a demanding and laborious multichannel recording method and often requires subjects to spend one night in a sleep laboratory. There is long tradition in Finland to use mattress sensors in SDB diagnostics. Recently, smaller electromechanical film transducer (Emfit) mattresses have replaced the old Static Charge-Sensitive Bed (SCSB) mattresses. However, a proper clinical validation of Emfit mattresses in SDB diagnostics has not been carried out.

In this work, the use of Emfit recording in the detection of sleep apneas, hypopneas, and prolonged partial obstruction with increased respiratory effort was evaluated. The general aim of the thesis is to develop and improve the diagnostic methods for sleep-related breathing disorders.

Comparisons with both PSG with nasal pressure recording and transesophageal pressure were made. Special attention was paid to the existence of the spiking phenomenon in the Emfit mattress in relation to changes in negative intrathoracic pressure in estimating increased respiratory effort. This entails monitoring the esophageal pressure as a part of nocturnal polysomnography. The recording method is demanding and uncomfortable and is usually not used with ordinary sleep laboratory patients. Thus, reliable and easy indirect quantification methods for respiratory effort are needed in clinical work. According to the results presented in this work, the Emfit signal reveals increased respiratory effort as well as apneas/hypopneas.

To find out the prevalence and consequences of prolonged partial obstruction among sleep laboratory patients was another aim of this thesis. This was done by retrospective analyses of sleep laboratory patients from one year. The prevalence of patients with prolonged partial obstruction was 11%. They were as sleepy as OSA patients, but their life quality was worse, as assessed by a survey. These results, along with the findings of the heart rate variation evaluation carried out in this thesis, suggest that prolonged partial obstruction and OSA should be considered as different entities of SDB.

With the Emfit mattress sensor, the SDB types can be differentiated, which is expected to enhance the accuracy of diagnostics. However, there is increasing need for easy and cheap screening methods to evaluate nocturnal breathing. In this respect, the usability of compressed tracheal sound signal scoring in SDB screening was estimated. The method reveals apneas and hypopneas but, according to the present findings, it can also be used in the detection of prolonged partial obstruction. The findings encourage the use of compressed tracheal sound analysis in screening different SDB.

The analysis of sleep recordings is still based on a doctor’s subjective and visual estimation. To date, no generally accepted and sufficiently reliable automatic analysis method exists. Robust, automatic quantification methods with easier techniques for non-invasive sleep recording would enable the analysis methods to be also used for screening purposes. In this technology-orientated world, people could take much more responsibility and take care of themselves better by following their own biosignals and by changing their health habits earlier. The need for good sleep as a necessity for good life and health is widely recognized.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Electronics and Communications Engineering
Contributors: Tenhunen, M.
Number of pages: 77
Publication date: 4 Sep 2015

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3531-4
ISBN (Electronic): 978-952-15-3556-7
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1304
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Developing commercialization plans through stakeholder interaction: Patterns identified from Public-Private Innovation Projects

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, University of Southern Denmark
Contributors: Höjbjerg Clarke, A., Rostgaard Evald, M., Aarikka-Stenroos, L.
Number of pages: 20
Publication date: 27 Aug 2015

Host publication information

Title of host publication: The 31st Annual IMP Conference and Doctoral Colloquium 2015, Kolding, Denmark.
Editors: Vagn Freytag, P., Höjbjerg Clarke, A.
Keywords: stakeholders, commercialization , innovation, Public sector, private

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Developing Learning and Teaching in Engineering Mathematics with and without Technology

University teachers of mathematics have begun to observe that nowadays new students when beginning their studies do not have as good a mathematical proficiency as before. The phenomenon has been noticed in all western countries during recent decades [1, 2]. What shall we do? We think that there are at least two available courses of action for improved learning results in university mathematics: 1) to identify as soon as possible the students who have an insufficient knowledge base in mathematics, and to begin remedial instruction for them, and 2) to develop mathematics learning environments both with and without technology.

The aim of this paper is to describe how Tampere University of Technology (TUT) has developed learning environments in mathematics during the last decade. We focus in the paper on two cases: 1) a multisemiotic approach to mathematical concepts and procedures, and 2) computer aided assessment and learning systems.

The first case consists of developing studies in mathematical exercises in which new kinds of problem-solving have been constructed. In the second case new students have participated in an ICT –based basic skills test at the beginning of their mathematics studies, to enable them to practice mathematical procedures in solving processes [3]. Electronic and web-based tools make it possible for students to learn independently at any time, and for teachers, offer an effective way to evaluate students’ proficiency.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Mathematics, Research group: MAT Positioning, Research group: Positioning, Research group: MAT Intelligent Information Systems Laboratory
Contributors: Joutsenlahti, J., Ali-Löytty, S., Pohjolainen, S.
Publication date: 15 Sep 2016

Host publication information

Title of host publication: SEFI 2016 Annual Conference Proceedings : Engineering Education on Top of the World: Industry University Cooperation
Publisher: European Society for Engineering Education SEFI
ISBN (Electronic): 9782873520144

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Development of a Low-Cost Fuzzy Gain Schedule Neutralization Control System

This paper has focused on the development of a Low-Cost Fuzzy Gain Schedule Neutralization Control System. The system dynamics has been identified for different operational conditions. The implementation and instrumentation of a typical Neutralization System using low cost elements, with an appropriate monitoring, control and data acquisition of the process variables has been successfully implemented, as well as the Fuzzy Gain Schedule pH neutralization controller. As inputs it has been used the Auxiliary Variable, defined with the linguist terms as Acid, Neutral and Alkaline by three trapezoidal membership functions, as well as the control error and the change in the control error, both defined by five triangular membership functions. The controller outputs were defined for the Acid and Alkali pumps by 18 triangular membership functions and it was defined a set of 50 fuzzy rules. The development of the control system considered in this paper reveals an attractive industrial application perspective, representing a potential application for water consumption reduction in industry, based on low cost elements.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, University of Campinas, Federal University of Uberlândia
Contributors: Sislian, R., Da Silva, F. V., Gedraite, R., Jokinen, H., An, D. K. R.
Number of pages: 4
Pages: 575-578
Publication date: Oct 2015

Host publication information

Title of host publication: WCECS 2015 - World Congress on Engineering and Computer Science 2015
Volume: II
Publisher: Newswood Limited
ISBN (Electronic): 9789881404725

Publication series

Name: Lecture Notes in Engineering and Computer Science
Volume: 2220
ISSN (Electronic): 2078-0966
ASJC Scopus subject areas: Computer Science (miscellaneous)
Keywords: Fuzzy control, Neutralization, Water consumption reduction
Source: Scopus
Source ID: 84992694500

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Development of chip-surface stimulus electrode array for fully-implantable subretinal prosthesis chip

In this study, we have developed a chip-surface stimulus electrode array for fully-implantable subretinal prosthesis chip. To realize visual restoration with high resolution, stimulus electrodes should be miniaturized and arrayed with high density. When we miniaturize them, however, their electrochemical impedances become higher and their amount of charge injection become smaller. Additionally, as the number of electrodes increases, it becomes difficult to make electrical connection to each pixel of the retinal prosthesis chip and each electrode by electrical wiring. To overcome these problems, we have developed the stimulus electrodes that have low electrochemical impedances and large charge injection capacities, and established a fabrication process of chip-surface stimulus electrode array. We fabricated the stimulus electrodes made of extremely porous platinum which had large-surface-area compared with conventional Pt. We also fabricated the chip-surface stimulus electrodes array on the subretinal prosthesis chip which surface was rough and covered with insulator film.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Biomaterials and Tissue Engineering Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), International Graduate School in Biomedical Engineering and Medical Physics (Ministry of Education in Finland), Graduate School of Engineering, Tohoku University
Contributors: Sasaki, Y., Suzuki, T., Iwagami, T., Tani, T., Naganuma, H., Kino, H., Hyttinen, J., Kellomäki, M., Tanaka, T.
Pages: O-253-O-254
Publication date: 17 Aug 2014
Peer-reviewed: Yes

Publication information

Journal: Transactions of Japanese Society for Medical and Biological Engineering
Volume: 52
ISSN (Print): 1347-443X
Ratings: 
  • Scopus rating (2014): CiteScore 0.01 SJR 0.127 SNIP 0.038
Original language: English
ASJC Scopus subject areas: Biomedical Engineering
Keywords: Electrode, Extremely porous platinum, Retinal prosthesis
Source: Scopus
Source ID: 84939439184

Research output: Contribution to journalArticleScientificpeer-review

Development of efficient electrically pumped nanolasers based on InAlGaAs tunnel junction

We propose and experimentally demonstrate a metallo-dielectric nanolasers utilizing an InAlGaAs tunnel junction for efficient carrier injection, which reduce the complexity when optimizing the metal contact, and reduces the device resistance.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Research group: ORC, University of California San Diego
Contributors: Fang, C. Y., Vallini, F., Amili, A. E., Tukiainen, A., Lyytikäinen, J., Guina, M., Fainman, Y.
Publication date: 2018

Host publication information

Title of host publication: CLEO : Science and Innovations, CLEO_SI 2018
Publisher: OSA - The Optical Society
ISBN (Electronic): 9781557528209
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Mechanics of Materials
Source: Scopus
Source ID: 85048984466

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Development of New Kinds of Plasmonics Materials Through Swift Heavy Ion Shaping Technique

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Physics, Research group: Nonlinear Optics
Contributors: Cardin, J., Dufour, C., KHOMENKOV, V., Fafin, A., Monnet, I., Rizza, G., COULON, P., Slablab, A., Mailly, D., Ulysse, C., Lafosse, X., Perruchas, S., Gacoin, T.
Publication date: 1 Jun 2013

Host publication information

Title of host publication: 7th International Conference on Materials for Advanced Technologies (ICMAT 2013), Jun 2013, Suntec, Singapore
Place of publication: Singapore
Source: Bibtex
Source ID: urn:ea7999b3358b51830b80923b8fb84f3a

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Development of Si neural probe module with adjustable gain amplifier for neuronal signal recording

In recent years, lots of research on biomedical technologies directly using bio-signals such as BMI (Brain Machine Interface) have been performed intensively. Among bio-signals, ECoG (Electrocorticogram), LFP (Local Field Potential), and AP (Action Potential) are usually recorded especially for diagnosis, treatment, and prevention of brain diseases. These bio-signals have different amplitudes and frequency bandwidths, and the signal intensities vary accordingly with recording electrode conditions and individual variation. Therefore, a multiple bio-signals recording system having adjustable gain and bandwidth is strongly required. In this study, we designed the adjustable gain amplifier appropriate for the system, and fabricated the module composed of the amplifier and a Si neural probe for the multiple bio-signal recording in the deep brain. Additionally, we verified fundamental functions of the module by in vitro experiments.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Biomaterials and Tissue Engineering Group, Research group: Computational Biophysics and Imaging Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), Graduate School of Engineering, Electrical and Electronics Engineering Department, Department of Bioengineering and Robotics, Tohoku University, Nagasaki Institute of Applied Science
Contributors: Tani, T., Naganuma, H., Harashima, T., Iwagami, T., Kino, H., Kiyoyama, K., Kellomäki, M., Hyttinen, J., Tanaka, T.
Pages: O-377-O-378
Publication date: 17 Aug 2014
Peer-reviewed: Yes

Publication information

Journal: Transactions of Japanese Society for Medical and Biological Engineering
Volume: 52
ISSN (Print): 1347-443X
Ratings: 
  • Scopus rating (2014): CiteScore 0.01 SJR 0.127 SNIP 0.038
Original language: English
ASJC Scopus subject areas: Biomedical Engineering
Keywords: Adjustable gain amplifier, Multiple bio-signal recording, Si neural probe
Source: Scopus
Source ID: 84939449061

Research output: Contribution to journalArticleScientificpeer-review

Development of students’ multidisciplinary collaboration skills by simulation of the design process

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector
Contributors: Salmisto, A., Keinänen, M., Kähkönen, K.
Pages: 348-360
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016: Volume I - Creating built environments of new opportunities.
Volume: 1
ISBN (Print): 978-952-15-3741-7
Keywords:  collaboration, multidisciplinary, engineering education, collaborative learning, design process

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

DIC measurements of the human heart during cardiopulmonary bypass surgery

Image-based measurements of the deformation of the human heart can be very useful to the surgeon, when assessing the condition and functioning of the patient’s heart. Digital image correlation can provide fast and accurate information about the deformation and motion of the surface of the heart. The deformation measurements can be visualized with colors allowing easy interpretation of the results, which makes this technique even more suitable for use in the operating room. Digital image correlation, however, requires either a natural or an artificial surface pattern with high contrast. The surface of the heart is wet, smooth, and has only a minimal contrast pattern, which cannot easily be improved with artificial markers. This preliminary feasibility study, however, shows that despite the practical and theoretical problems, DIC can provide useful data on the deformation of the human heart during cardiopulmonary bypass surgery. The results show that the natural patterns of the right atrium and ventricle are sufficient for DIC analysis, but significantly better results could be obtained with higher contrast artificial patterns.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Materials Science, Research group: Materials Characterization, Universitätsklinikum Gießen und Marburg GmbH, LaVision GmbH
Contributors: Hokka, M., Mirow, N., Nagel, H., Vogt, S., Kuokkala, V.
Number of pages: 9
Pages: 51-59
Publication date: 2016

Host publication information

Title of host publication: Conference Proceedings of the Society for Experimental Mechanics Series
Volume: 6
Publisher: Springer New York LLC
ISBN (Print): 9783319214542
ASJC Scopus subject areas: Engineering(all), Computational Mechanics, Mechanical Engineering
Keywords: Digital Image Correlation, Human heart, In-vivo measurements, Natural pattern

Bibliographical note

JUFOID=72540

Source: Scopus
Source ID: 84952003607

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Diesel engine exhaust particle measurements using a particle size magnifier (PSM)

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Physics, Research area: Aerosol Physics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group, Metropolia University of Applied Science, Metropolia University of Applied Sciences, Helsinki University
Contributors: Kuuluvainen, H., Karjalainen, P., Saukko, E., Nousiainen, P., Karhu, T., Pirjola, L., Keskinen, J., Rönkkö, T.
Publication date: 2015

Host publication information

Title of host publication: EAC 2015, European Aerosol Conference, 6-11 September, 2015, Milan, Italy

Bibliographical note

ISBN kysytty, HO.
Ei ole, HO.

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Difference frequency modulation of multi-section dual-mode lasers with nanoscale surface gratings

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, Research group: Nanophotonics, Facilities and Infrastructure
Contributors: Uusitalo, T., Virtanen, H., Viheriälä, J., Salmi, J., Aho, A. T., Dumitrescu, M.
Number of pages: 9
Publication date: 7 Mar 2016

Host publication information

Title of host publication: SPIE Proceedings : Novel In-Plane Semiconductor Lasers XV
Volume: 9767
Publisher: SPIE
Editors: Belyanin, A. A., Smowton, P. M.
Article number: 97670S

Publication series

Name: Proceedings of SPIE
ISSN (Electronic): 0277-786X
Keywords: Frequency modulation, lasers, Nanotechnology, Modulation, Nanoimprint lithography, Quantum dots, terahertz radiation, ultraviolet radiation, distributed feedback laser diodes

Bibliographical note

INT=orc,"Aho, Antti T."
JUFOID=71479

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Different approaches of the PLM maturity concept and their use domains –analysis of the state of the art

Product lifecycle management (PLM) implementation and adoption involves extensive changes in both intra-and inter-organizational practices. Various maturity approaches, for instance based on CMM (Capability maturity modeling) principles, can be used to make the implementation of PLM a better approachable and a more carefully planned and coordinated process. However, there are a number of different types of current approaches which can be thought to fall under the concept of PLM maturity. The aim of this paper is to investigate, analyze and categorize the various existing PLM maturity approaches to get an organized picture of the models and their background presumptions, as well as their potential use domains, and to facilitate their proper use to better implement PLM in different industry contexts.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics, Research group: Novi, Lappeenranta University of Technology
Contributors: Kärkkäinen, H., Silventoinen, A.
Number of pages: 14
Pages: 89-102
Publication date: 2016

Host publication information

Title of host publication: Product Lifecycle Management in the Era of Internet of Things : 12th IFIP WG 5.1 International Conference, PLM 2015, Doha, Qatar, October 19-21, 2015, Revised Selected Papers
Publisher: Springer New York LLC
ISBN (Print): 978-3-319-33110-2

Publication series

Name: IFIP Advances in Information and Communication Technology
Volume: 467
ISSN (Print): 1868-4238
ASJC Scopus subject areas: Information Systems and Management
Keywords: Comparison, Maturity approaches, Maturity models, Product lifecycle management, State-of-the-Art
Source: Scopus
Source ID: 84964801199

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Different types of non-volatile nanoparticles in off-road diesel engine exhaust

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Physics, Research area: Aerosol Physics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group
Contributors: Kuuluvainen, H., Karjalainen, P., Saukko, E., Nilsson, O., Sirviö, K., Ovaska, T., Niemi, S., Keskinen, J., Rönkkö, T.
Publication date: 2015

Host publication information

Title of host publication: EAC 2015, European Aerosol Conference, 6-11 September, 2015, Milan, Italy

Bibliographical note

ISBN kysytty, HO.
Ei ole, HO.

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Diffraction compensation of finite beams in hyperbolic metamaterials

The propagation of finite size beams in a hyperbolic metamaterial is modeled as a moving particle of negative mass. We show the occurrence of anomalous diffraction, diffraction compensation and profile recovery for any input excitation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research group: Nonlinear Optics, Research area: Optics, Univ Porto, Universidade do Porto, Fac Ciencias, Ctr Fis Porto
Contributors: Pannian, J. C., Alberucci, A., Boardman, A., Assanto, G.
Publication date: 2016

Host publication information

Title of host publication: Laser science 2016
Publisher: Optical Society of America (OSA)
Article number: JW4A.10
ISBN (Print): 978-1-943580-19-4

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Diffusion of innovation: Case of co-design of cabins in mobile work machine industry

This paper describes the development of using virtual reality for work content in one application area over a decade. Virtual reality technology has developed rapidly; from walk-in CAVE-like virtual environments to head-mounted displays within a decade. In this paper, the development is studied through the lens of diffusion of innovation theory, which focuses not only on innovation itself, but also on the social system. The development of virtual technology is studied by one case, which is cabin design in the mobile work machine industry. This design process has been especially suitable for using virtual reality technology.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Automation Technology and Mechanical Engineering, Tampere University
Contributors: Ellman, A., Tiainen, T.
Publication date: 1 Jun 2019
Peer-reviewed: Yes

Publication information

Journal: Computers
Volume: 8
Issue number: 2
Article number: 39
ISSN (Print): 2073-431X
Original language: English
ASJC Scopus subject areas: Human-Computer Interaction, Computer Networks and Communications
Keywords: Cabin design, Diffusion of innovation, Virtual reality
Electronic versions: 
Source: Scopus
Source ID: 85069801135

Research output: Contribution to journalArticleScientificpeer-review

Digital Hydraulics on Rails – Pilot Project of Improving Reliability on Railway Rolling Stock by Utilizing Digital Valve System

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Fluid power automation in mobile machines, Research group: Powertrain design, Research group: Digital hydraulics, Bosch Rexroth AG, VR-Group Ltd
Contributors: Fischer, H., Laamanen, A., Iso-Heiko, A., Schäfer, O., Karvonen, M., Karhu, O., Huhtala, K., Pulkkinen, V., Huttunen, A.
Number of pages: 11
Pages: 644-654
Publication date: 20 May 2015

Host publication information

Title of host publication: Proceedings of The Fourteenth Scandinavian International Conference on Fluid Power, SICFP15
Editors: Laamanen, A., Huhtala, K.
ISBN (Electronic): 978-952-15-3530-7, 978-952-15-3658-8

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Digital image correlation study of the deformation and functioning of the human heart during open-heart surgery

Currently, ultrasound technology is routinely used for monitoring of the left side of the human heart during open-heart surgery. However, this method shows shortcomings in providing accurate information of the right ventricle and atrium. The aim of this paper is to demonstrate how Digital Image Correlation (DIC) can be used to monitor the functioning of the heart during open-heart surgery and potentially overcome some of the shortcomings of ultrasound methods. Being a contact-free method is a major asset from a practical implementation perspective of DIC. In this paper, we present the methodology of the experiment and some preliminary results of a study in which a DIC system was installed in an operating room and image sequences of the heart were taken at three stages of the surgery. We present a procedure for obtaining DIC measurements in this challenging setting, discuss how the data was extracted as well as how the measured values changed during the operation in the context of the surgical stages and interventions performed.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, Research group: Materials Characterization
Contributors: Soltani, A., Curtze, S., Lahti, J., Järvelä, K., Laurikka, J., Hokka, M., Kuokkala, V. T.
Number of pages: 9
Pages: 19-27
Publication date: 2018

Host publication information

Title of host publication: Mechanics of Biological Systems, Materials and other topics in Experimental and Applied Mechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
Volume: 4
Publisher: Springer New York LLC
ISBN (Print): 9783319635514

Publication series

Name: Conference Proceedings of the Society for Experimental Mechanics
ISSN (Print): 2191-5644
ISSN (Electronic): 2191-5652
ASJC Scopus subject areas: Engineering(all), Computational Mechanics, Mechanical Engineering
Keywords: Biomaterial characterization, Deformation, DIC, Motion, Open heart surgery
Source: Scopus
Source ID: 85032509230

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Direct Laser Writing of Fluorescent Silver Nanoclusters in Polyvinyl Alcohol Films

We demonstrate successful fabrication of fluorescent microstructures by direct laser writing of silver nanoclusters in polyvinyl alcohol films using a cost-effective laser diode. The nanoclusters show very good photostability in the widely used polymer material.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research area: Optics, Research group: Nonlinear Optics, Research group: Applied Optics, Frontier Photonics
Contributors: Karimi, N., Kunwar, P., Toivonen, J.
Publication date: Oct 2015

Host publication information

Title of host publication: Frontiers in Optics 2015 : Proceedings
Article number: FTu5E.4
ISBN (Electronic): 978-1-943580-03-3
ASJC Scopus subject areas: Physics and Astronomy(all)
Keywords: Optical data storage, Microstructure fabrication, Fluorescence, laser-induced

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Direct Measurement of Temporal Rogue Waves Generated by Spontaneous Modulation Instability

We measure the real time intensity profiles of localized structures emerging from spontaneous modulation instability. We show that the results can be interpreted in terms of analytical solutions of the nonlinear Schrödinger equation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research area: Optics, Research group: Nonlinear Fiber Optics, Institut FEMTO-ST, Institut FEMTO-ST, Université de Franche-Comté, School of Mathematical Sciences, University College Dublin, Institut FEMTO-ST, UMR 6174 CNRS-Université de Franche-Comté
Contributors: Narhi, M., Wetzel, B., Billet, C., Merolla, J., Toenger, S., Sylvestre, T., Morandotti, R., Dias, F., Genty, G., Dudley, J. M.
Publication date: 2016

Host publication information

Title of host publication: Frontiers in Optics 2016
Publisher: Optical Society of America
Article number: FTu3I.4
ISBN (Print): 978-1-943580-19-4

Bibliographical note

EXT=”Toenger, Shanti”

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Discovering collaborative and inclusive solutions to co-create multidimensional value in cross-sector collaboration

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management, Research group: Knowledge and Learning Research Center, Hanken School of Economics
Contributors: Vuori, V., Bor, S., Polsa, P., Käpylä, J., Helander, N.
Number of pages: 6
Pages: 364-369
Publication date: Sep 2019

Host publication information

Title of host publication: Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management : 17-19 September, 2019, Vienna, Austria
Publisher: SCITEPRESS
ISBN (Print): 9789897583827

Publication series

Name: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Volume: 3

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Disruptive innovation in ecosystems: Path-creation and institutional barriers

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Center for Innovation and Technology Research, Lappeenranta University of Technology
Contributors: Ritala, P., Aarikka-Stenroos, L.
Number of pages: 16
Pages: 1-16
Publication date: Jun 2016

Host publication information

Title of host publication: XXVI ISPIM Conference: Porto, Portugal (2016) Blending Tomorrow’s Innovation Vintage. : The International Society for Professional Innovation Management, Jun. 2016
Place of publication: Manchester
Publisher: International Society for Professional Innovation Management ISPIM
ISBN (Print): 978-952-265-929-3
ISBN (Electronic): 978-952-265-929-3
Source: Bibtex
Source ID: urn:c0dee1d4b4657d55de8d93bf3fad657c

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Distributed Experiments in Design Sciences, a Next Step in Design Observation Studies?

This paper describes and proposes a new method for conducting globally distributed design research. Instead of using e.g. a software we tried out a completely analogue approach: Five carefully prepared packages, containing all the necessary materials and instructions for a design challenge, were sent out to supervisors in Norway, Finland, Italy, and Australia. These local supervisors then conducted the egg-drop exercise with students that are part of an international course held at CERN. As the task is conducted according to a previously tested protocol, the results gathered with this new method can then be benchmarked with this available data. This new approach to globally conducted engineering design activities avoids local bias and enables for gathering large amounts of diverse data points. One can also think of a research community where every member can send out one experiment per year and, in return, receives data points from across the world.

Based on the feedback from the supervisors we can say that from an organisational standpoint of view, this method works well. The comparison to the existing data has yet to be done.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, NTNU Trondheim, Aalto Univ, Aalto University, Helsinki Inst Phys, Unimore, Swinburne University of Technology, CERN, European Organization for Nuclear Research (CERN)
Contributors: Kriesi, C., Steinert, M., Aalto-Setälä, L., Anvik, A., Balters, S., Baracchi, A., Jensen, B. M., Bjorkli, L. E., Buzzaccaro, N., Cortesi, D., D'Onghia, F., Dosi, C., Franchini, G., Fuchs, M., Gerstenberg, A., Hansen, E., Hiekkanen, K. M., Hyde, D., Ituarte, I., Kalasniemi, J., Kurikka, J., Lanza, I., Laurila, A., Lee, T. H., Lonvik, S., Mansikka-Aho, A., Nordberg, M., Oinonen, P., Pedrelli, L., Pekuri, A., Rane, E., Reime, T., Repokari, L., Ronningen, M., Rowlands, S., Sjoman, H., Slattsveen, K., Strachan, A., Stromstad, K., Suren, S., Tapio, P., Utriainen, T., Vignoli, M., Vijaykumar, S., Welo, T., Wulvik, A.
Number of pages: 10
Publication date: 2015

Host publication information

Title of host publication: DS 80-2 Proceedings of the 20th International Conference on Engineering Design (ICED 15) Vol 2: Design Theory and Research Methodology Design Processes
Publisher: DESIGN SOC
Editors: Weber, C., Husung, S., Cantamessa, M., Cascini, G., Marjanovic, D., Venkataraman, S.

Publication series

Name: International Conference on Engineering Design
Publisher: DESIGN SOC
ISSN (Print): 2220-4334
Keywords: Research methodologies and methods, Crowdsourcing, Collaborative design, Prototyping, Globally distributed experiment, COLLABORATION, STRESS
Source: WOS
Source ID: 000366977500032

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Distributed power allocation over indoor multi-pico stations

A low-complexity distributed power allocation algorithm is proposed to reduce the interference and improve the transmitting rate of edge users. Different scenarios are considered and user experience of indoor communication is promoted. The simulation results prove the effectiveness of our algorithm. The proposed power control scheme ensures that more users can achieve their required rate and the fairness of different users is improved. Besides, more than 50% energy can be saved without loss in outage ability, and energy efficiency is also promoted. In addition, the proposed algorithm can be extended to scenarios that the required rates of pico stations can be changed periodically.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Wireless Communications and Positioning, Beijing Institute of Petrochemical Technology, School of Information and Electronics, Beijing Institute of Technology
Contributors: Fei, Z. S., Gao, Q., Fu, Y., Isotalo, T., Niemelä, J.
Number of pages: 6
Pages: 227-232
Publication date: 1 Jun 2015
Peer-reviewed: Yes

Publication information

Journal: Journal of the Beijing Institute of Technology
Volume: 24
Issue number: 2
ISSN (Print): 1004-0579
Ratings: 
  • Scopus rating (2015): CiteScore 0.1 SJR 0.153 SNIP 0.163
Original language: English
ASJC Scopus subject areas: Engineering(all)
Keywords: Distributed power allocation, Indoor communication, Multi-pico stations
Source: Scopus
Source ID: 84940670650

Research output: Contribution to journalArticleScientificpeer-review

Distributors As Market Orientation Agents in Innovation Development and Commercialization.

General information