Integrating III-V, Si, and polymer waveguides for optical interconnects: RAPIDO

We present a vision for the hybrid integration of advanced transceivers at 1.3 μm wavelength, and the progress done towards this vision in the EU-funded RAPIDO project. The final goal of the project is to make five demonstrators that show the feasibility of the proposed concepts to make optical interconnects and packet-switched optical networks that are scalable to Pb/s systems in data centers and high performance computing. Simplest transceivers are to be made by combining directly modulated InP VCSELs with 12 μm SOI multiplexers to launch, for example, 200 Gbps data into a single polymer waveguide with 4 channels to connect processors on a single line card. For more advanced transceivers we develop novel dilute nitride amplifiers and modulators that are expected to be more power-efficient and temperatureinsensitive than InP devices. These edge-emitting III-V chips are flip-chip bonded on 3 μm SOI chips that also have polarization and temperature independent multiplexers and low-loss coupling to the 12 μm SOI interposers, enabling to launch up to 640 Gbps data into a standard single mode (SM) fiber. In this paper we present a number of experimental results, including low-loss multiplexers on SOI, zero-birefringence Si waveguides, micron-scale mirrors and bends with 0.1 dB loss, direct modulation of VCSELs up to 40 Gbps, ±0.25μm length control for dilute nitride SOA, strong band edge shifts in dilute nitride EAMs and SM polymer waveguides with 0.4 dB/cm loss.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, VTT Technical Research Centre of Finland, IBM Research, Vertilas GmbH, Scuola Superiore sant'Anna, Tyndall National Institute at National University of Ireland, Cork, Modulight Inc.
Contributors: Aalto, T., Harjanne, M., Offrein, B. J., Caër, C., Neumeyr, C., Malacarne, A., Guina, M., Sheehan, R. N., Peters, F. H., Melanen, P.
Publication date: 2016

Host publication information

Title of host publication: Optical Interconnects XVI
Publisher: SPIE
Article number: 97530D
ISBN (Print): 9781628419887

Publication series

Name: Proceedings of SPIE
Volume: 9753
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Applied Mathematics, Computer Science Applications, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Keywords: electro absorption modulator, hybrid integration, optical interconnect, optical interposer, optoelectronics, polymer photonics, semiconductor optical amplifier, Silicon photonics, VCSEL, wavelength multiplexers

Bibliographical note

EXT="Melanen, Petri"

Source: Scopus
Source ID: 84975114015

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

Effect of active damping on the output impedance of PV inverter

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
Publication date: 2015

Host publication information

Title of host publication: IEEE 16th Workshop on Control and Modeling for Power Electronics (COMPEL)
ISBN (Print): 978-1-4673-6847-6

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

Initiation processes and initiation contributors illustrated by Norwegian-South Korean business relationships

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, Norwegian University of Science and Technology, NTNU
Contributors: Aarikka-Stenroos, L., Aaboen, L., Rolfsen, A.
Number of pages: 28
Publication date: 27 Aug 2015

Host publication information

Title of host publication: The 31st IMP Conference 2015, Kolding, Denmark.
Place of publication: Kolding, Denmark
Editors: Vagn Freytag, P., Höjbjerg Clarke, A.
Keywords: initiation, international business, marketing

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

Distributors As Market Orientation Agents in Innovation Development and Commercialization.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Perkin Elmer
Contributors: Aarikka-Stenroos, L., Talvitie, M.
Number of pages: 17
Publication date: 14 Jun 2015

Host publication information

Title of host publication: The Proceedings of the XXVI ISPIM Conference 2015 Budapest, Hungary
Place of publication: Denmark
Publisher: International Society for Professional Innovation Management ISPIM
ISBN (Electronic): 978-952-265-779-4
Keywords: Innovation, distributor, market demands, commercialization

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

Multiple facets of innovation and business ecosystem research: the foci, methods and future agenda

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: Aarikka-Stenroos, L., Peltola, T., Rikkiev, A., Saari, U.
Pages: 1-33
Publication date: 19 Jun 2016

Host publication information

Title of host publication: XXVII ISPIM Innovation Conference 2016 : Porto, 19-22 June, 2016
ISBN (Electronic): 978-952-265-929-3
Source: Bibtex
Source ID: urn:de0e11bb8d4f01574e47a23803543bc1

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

How to develop a new innovation education tool: case of impact canvas

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, Innovation Services, Research Services, University of Tampere
Contributors: Aarikka-Stenroos, L., Boedeker, S., Köppä, L., Langwaldt, J.
Publication date: Dec 2016

Host publication information

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

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

Business catalysts for the Circular Economy innovations

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial Engineering and Management, Research group: Center for Innovation and Technology Research
Contributors: Aarikka-Stenroos, L., Ranta, V.
Publication date: Jun 2019

Host publication information

Title of host publication: Proceedings of The XXX ISPIM INNOVATION CONFERENCE - Celebrating Innovation - 500 Years Since Da Vinci : 16-19 June 2019 - Florence, Italy
Publisher: International Society for Professional Innovation Management ISPIM
ISBN (Print): 978-952-335-351-0

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

Frequency Comb Generation in a Continuous-Wave Pumped Second-Order Nonlinear Waveguide Resonator

Optical frequency comb generation has been experimentally studied using an integrated system based on a lithium niobate waveguide resonator featuring a strong quadratic nonlinearity. Our theoretical model shows good agreement with the experimental results.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, Paderborn University, University of Helsinki, VTT Technical Research Centre of Finland
Contributors: Abdallah, Z., Stefszky, M., Ulvila, V., Silberhorn, C., Vainio, M.
Publication date: 1 May 2019

Host publication information

Title of host publication: 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings
Publisher: IEEE
ISBN (Electronic): 9781943580576
ASJC Scopus subject areas: Spectroscopy, Industrial and Manufacturing Engineering, Safety, Risk, Reliability and Quality, Management, Monitoring, Policy and Law, Electronic, Optical and Magnetic Materials, Radiology Nuclear Medicine and imaging, Instrumentation, Atomic and Molecular Physics, and Optics
Source: Scopus
Source ID: 85069196416

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

Exploration of different boundary conditions in the sideways falling situation in hip fracture finite element modelling

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, Department of Electronics and Communications Engineering, Research group: Computational Biophysics and Imaging Group, BioMediTech, UKK Institute for Health Promotion Research, Jyväskylän yliopisto, Jyvaskyla Central Hospital
Contributors: Abe, S., Ylinen, A., Narra Girish, N., Nikander, R., Hyttinen, J., Kouhia, R., Sievänen, H.
Number of pages: 6
Pages: 130-135
Publication date: 2015

Host publication information

Title of host publication: Proceeding 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

ORG=mei,0.5
ORG=elt,0.5
EXT="Sievänen, Harri"

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

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

The effects of neuron morphology on graph theoretic measures of network connectivity: The analysis of a two-level statistical model

We developed a two-level statistical model that addresses the question of how properties of neurite morphology shape the large-scale network connectivity. We adopted a low-dimensional statistical description of neurites. From the neurite model description we derived the expected number of synapses, node degree, and the effective radius, the maximal distance between two neurons expected to form at least one synapse. We related these quantities to the network connectivity described using standard measures from graph theory, such as motif counts, clustering coefficient, minimal path length, and small-world coefficient. These measures are used in a neuroscience context to study phenomena from synaptic connectivity in the small neuronal networks to large scale functional connectivity in the cortex. For these measures we provide analytical solutions that clearly relate different model properties. Neurites that sparsely cover space lead to a small effective radius. If the effective radius is small compared to the overall neuron size the obtained networks share similarities with the uniform random networks as each neuron connects to a small number of distant neurons. Large neurites with densely packed branches lead to a large effective radius. If this effective radius is large compared to the neuron size, the obtained networks have many local connections. In between these extremes, the networks maximize the variability of connection repertoires. The presented approach connects the properties of neuron morphology with large scale network properties without requiring heavy simulations with many model parameters. The two-steps procedure provides an easier interpretation of the role of each modeled parameter. The model is flexible and each of its components can be further expanded. We identified a range of model parameters that maximizes variability in network connectivity, the property that might affect network capacity to exhibit different dynamical regimes.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Computational Neuro Science-CNS, Department of Signal Processing, University of Oslo
Contributors: Acimovic, J., Mäki-Marttunen, T., Linne, M.
Publication date: 10 Jun 2015
Peer-reviewed: Yes

Publication information

Journal: Frontiers in Neuroanatomy
Volume: 9
Issue number: June
Article number: 76
ISSN (Print): 1662-5129
Ratings: 
  • Scopus rating (2015): CiteScore 2.73 SJR 1.852 SNIP 0.782
Original language: English
ASJC Scopus subject areas: Anatomy, Neuroscience (miscellaneous), Cellular and Molecular Neuroscience
Keywords: Graph theory, Motifs, Network connectivity, Neurite density field, Neuron morphology, Theoretical model
Source: Scopus
Source ID: 84935865748

Research output: Contribution to journalArticleScientificpeer-review

Sound Event Detection in Multichannel Audio Using Spatial and Harmonic Features

In this paper, we propose the use of spatial and harmonic features in combination with long short term memory (LSTM) recurrent neural network (RNN) for automatic sound event detection (SED) task. Real life sound recordings typically have many overlapping sound events, making it hard to recognize with just mono channel audio. Human listeners have been successfully recognizing the mixture of overlapping sound events using pitch cues and exploiting the stereo (multichannel) audio signal available at their ears to spatially localize these events. Traditionally SED systems have only been using mono channel audio, motivated by the human listener we propose to extend them to use multichannel audio. The proposed SED system is compared against the state of the art mono channel method on the development subset of TUT sound events detection 2016 database. The proposed method improves the F-score by 3.75% while reducing the error rate by 6%.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Audio research group - ARG, Research group: Audio research group
Contributors: Adavanne, S., Parascandolo, G., Pertilä, P., Heittola, T., Virtanen, T.
Pages: 6-10
Publication date: 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

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

VisualLabel: An Integrated Multimedia Content Management and Access Framework

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Pervasive Computing, Research group: Software Engineering and Intelligent Systems, Arcada University of Applied Sciences, Aalto University, department of Computer Science, Lynx Technology Finland Oy, Aalto University
Contributors: Ahmad, I., Rantanen, P., Sillberg, P., Laaksonen, J., Liu, S., Forss, T., Malik, A., Nieminen, M., Shetty, R., Ishikawa, S., Kallio, J., Saarinen, J. P., Gabbouj, M., Soini, J.
Number of pages: 22
Pages: 332-353
Publication date: 2017

Host publication information

Title of host publication: The Proceedings of the 27th International Conference on Information Modelling and Knowledge Bases, EJC 2017 : June 5-9, 2017, Krabi, Thailand
ISBN (Electronic): 978-616-407-165-0

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

Glove-integrated slotted patch antenna for wearable UHF RFID reader

We present a glove-integrated slotted patch antenna for a wearable Ultra High Frequency Radio Identification Technology (UHF RFID) reader operating at 866
MHz. We tested the prototype antenna made of copper foil adhered on low-permittivity Ethylene Propylene Diene Monomer (EPDM) foam material having the thickness of 4 mm. To characterize the antenna, we tested it wirelessly in
communication with a common dipole type RFID tag to estimate its realized gain, radiation pattern and maximum tag read range it provides. We also analyzed the effects of variable separation between the antenna and the body to confirm stable operation required by the application. The results showed that the antenna feasible for the work glove applications providing the read range
up to 360 cm with the reader’s output power of 28.4 dBm.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Research group: Wireless Identification and Sensing Systems Research Group, BioMediTech
Contributors: Ahmed, S., Musfequr Rehman, S. M., Ukkonen, L., Björninen, T.
Number of pages: 4
Publication date: 26 Sep 2018

Host publication information

Title of host publication: 2018 IEEE International Conference on RFID Technology & Application (RFID-TA)
Publisher: IEEE
ISBN (Electronic): 978-1-5386-5057-8

Bibliographical note

INT=TUT-BMT,"Musfequr Rehman, S. M."

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

Glove-Integrated Textile Antenna with Reduced SAR for Wearable UHF RFID Reader

We present a wearable slotted patch antenna embedded in a glove for wearable UHF RFID reader. The antenna is fully-textile based, small enough to fit on the area in the back of the hand and achieves the realized gain of –1.3 dBi at 866 MHz in body-worn configuration. The paper outlines the numerical optimization of the antenna using a layered hand model and assessment of the specific absorption rate to determine the maximum output power of the reader that complies with the SAR safety limits. As a novel feature, we have designed an isolator layer of conductive textile that is adhered inside the glove underneath the antenna to achieve 10 percent reduction in the specific absorption rate (SAR) and 1.14 dBi improvement in the realized gain compared to our earlier work. With these marked improvements, the output power of the reader is not limited by SAR, but by the regular RFID emission limit. In the wireless testing, we have verified a detection range of 4.7 meters for a regular dipole type RFID tag with 3.19 WEIRP.

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: Ahmed, S., Mehmood, A., Sydänheimo, L., Ukkonen, L., Björninen, T.
Number of pages: 5
Pages: 231-235
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: slotted patch antenna, RFID reader antenna, UHF, wearable antenna, work glove application, e-textile
Source: Bibtex
Source ID: 8892251

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

The circular economy of projects

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 Project and Service Business (CROPS)
Contributors: Ahola, T., Martinsuo, M.
Publication date: Jun 2019

Host publication information

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

Publication series

Name: European academy of management annual conference
ISSN (Print): 2466-7498

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

Vehicle Mass Estimation for Hydraulic Drive System using Longitudinal Motion Model

The real-time mass estimation of the vehicle is applied for the machine with the hydraulic drive system. The mass estimation is based on the longitudinal drive model comprising the model of hydraulic drive transmission. The resistance forces of the longitudinal motion such as the air drag, rolling resistance and
friction of the drive system are modelled. The actual mass of the vehicle is deduced from the measured hydraulic torque and from the force causing the acceleration. As the aerodynamic drag, rolling resistance, road grade load and transmission losses have a significant share from the total drive torque, the effects of these forces are taken account. Further, the estimated mass data is classified by recognising operation conditions where the mass estimation is accurate. After a short acceleration-deceleration period, the measured signals provide enough data for estimating the mass of the vehicle. The experimental tests are run with a middle-size wheel loader and with a typical work cycle resulting ±5% accuracy from the real mass. Furthermore, the proposed model and recognition of the operation conditions are applicable to estimate also other vehicle parameters such as friction force or road grade.

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
Contributors: Ahopelto, M., Krogerus, T., Huhtala, K.
Number of pages: 10
Pages: 433-442
Publication date: May 2015

Host publication information

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

Publication series

Name: The Fourteenth Scandinavian International Conference on Fluid Power, SICFP15
ISSN (Electronic): 2342-2726
Keywords:  Longitudinal motion, mass estimation, hydraulic drive system, wheel loader
URLs: 

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

Keyframe-based video summarization with human in the loop

In this work, we focus on the popular keyframe-based approach for video summarization. Keyframes represent important and diverse content of an input video and a summary is generated by temporally expanding the keyframes to key shots which are merged to a continuous dynamic video summary. In our approach, keyframes are selected from scenes that represent semantically similar content. For scene detection, we propose a simple yet effective dynamic extension of a video Bag-of-Words (BoW) method which provides over segmentation (high recall) for keyframe selection. For keyframe selection, we investigate two effective approaches: local region descriptors (visual content) and optical flow descriptors (motion content). We provide several interesting findings. 1) While scenes (visually similar content) can be effectively detected by region descriptors, optical flow (motion changes) provides better keyframes. 2) However, the suitable parameters of the motion descriptor based keyframe selection vary from one video to another and average performances remain low. To avoid more complex processing, we introduce a human-in-the-loop step where user selects keyframes produced by the three best methods. 3) Our human assisted and learning-free method achieves superior accuracy to learning-based methods and for many videos is on par with average human accuracy.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Vision
Contributors: Ainasoja, A. E., Hietanen, A., Lankinen, J., Kämäräinen, J.
Number of pages: 10
Pages: 287-296
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: Optical flow descriptors, Region descriptors, Video summarization, Visual bag-of-words

Bibliographical note

INT=sgn,"Lankinen, Jukka"

Source: Scopus
Source ID: 85047872595

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

Smartphone teleoperation for self-balancing telepresence robots

Self-balancing mobile platforms have recently been adopted in many applications thanks to their light-weight and slim build. However, inherent instability in their behaviour makes both manual and autonomous operation more challenging as compared to traditional self-standing platforms. In this work, we experimentally evaluate three teleoperation user interface approaches to remotely control a self-balancing telepresence platform: 1) touchscreen button user interface, 2) tilt user interface and 3) hybrid touchscreen-tilt user interface. We provide evaluation in quantitative terms based on user trajectories and recorded control data, and qualitative findings from user surveys. Both quantitative and qualitative results support our finding that the hybrid user interface (a speed slider with tilt turn) is a suitable approach for smartphone-based teleoperation of self-balancing telepresence robots. We also introduce a client-server based multi-user telepresence architecture using open source tools.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences
Contributors: Ainasoja, A. E., Pertuz, S., Kämäräinen, J.
Number of pages: 8
Pages: 561-568
Publication date: 2019

Host publication information

Title of host publication: VISIGRAPP 2019 - Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications
Publisher: SCITEPRESS
Editors: Kerren, A., Hurter, C., Braz, J.
ISBN (Electronic): 9789897583544
ASJC Scopus subject areas: Computer Science Applications, Computer Vision and Pattern Recognition, Computer Graphics and Computer-Aided Design
Keywords: Teleoperation, Telepresence, User Interface
Electronic versions: 
Source: Scopus
Source ID: 85068231086

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

Spatial borders and affordances of a temporary school building – Enhancing the school engagement and learning experience

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Airo, K., Vaara, L., Nenonen, S.
Pages: 715-725
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016: Volume II - Environmental Opportunies and Challenges. Constructing Commitment and Acknowledging Human Experiences
Publisher: Tampere University of Technology. Department of Civil Engineering
ISBN (Electronic): 978-952-15-3742-4

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

Riding for a fall in outsourced ISD: Knowledge transfer challenges between the onshore vendor and the offshored unit

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics, Research group: Novi, Managing digital industrial transformation (mDIT), Tampere University of Technology
Contributors: Alanne, A., Pekkola, S.
Number of pages: 17
Pages: 124-140
Publication date: 2015

Host publication information

Title of host publication: Achieving Success and Innovation in Global Sourcing: Perspectives and Practices : 9th Global Sourcing Workshop 2015, La Thuile, Italy, February 18-21, 2015, Revised Selected Papers
Place of publication: Germany
Publisher: Springer Verlag
Editors: Oshri, I., Kotlarsky, J., Willcocks, L.
ISBN (Print): 978-3-319-26738-8
ISBN (Electronic): 978-3-319-26739-5

Publication series

Name: Lectures Notes in Business Information Processing
Volume: 236
ISSN (Print): 1865-1348

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

Riding for a fall in outsourced ISD: Transferring knowledge between onshore vendor and offshored unit

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Information Management and Logistics, Research group: Novi
Contributors: Alanne, A., Pekkola, S.
Publication date: 18 Feb 2015

Host publication information

Title of host publication: 9th Global Sourcing Workshop 2015 : La Thuile, Italy, February 18-21, 2015

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

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

Nonperturbative nonlinear optics in liquid crystals

We show that reorientational nematic liquid crystals are an ideal workbench for the investigation of non-perturbative nonlinear optical effects and report light self-steering, power-controlled negative refraction and spontaneous symmetry breaking.

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 Roma Tre, Roma Tre University, NooEL Nonlinear Opt & OptoElect Lab, University of Southampton, United Kingdom, Univ Porto, Universidade do Porto, Fac Ciencias, Ctr Fis Porto
Contributors: Alberucci, A., Piccardi, A., Kravets, N., Buchnev, O., Pannian, J. C., Assanto, G.
Publication date: 2016

Host publication information

Title of host publication: Laser science 2016
Publisher: Optical Society of America (OSA)
Article number: JW4A.12
ISBN (Print): 978-1-943580-19-4

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

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

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

DroneRF dataset: A dataset of drones for RF-based detection, classification and identification

Modern technology has pushed us into the information age, making it easier to generate and record vast quantities of new data. Datasets can help in analyzing the situation to give a better understanding, and more importantly, decision making. Consequently, datasets, and uses to which they can be put, have become increasingly valuable commodities. This article describes the DroneRF dataset: a radio frequency (RF) based dataset of drones functioning in different modes, including off, on and connected, hovering, flying, and video recording. The dataset contains recordings of RF activities, composed of 227 recorded segments collected from 3 different drones, as well as recordings of background RF activities with no drones. The data has been collected by RF receivers that intercepts the drone's communications with the flight control module. The receivers are connected to two laptops, via PCIe cables, that runs a program responsible for fetching, processing and storing the sensed RF data in a database. An example of how this dataset can be interpreted and used can be found in the related research article “RF-based drone detection and identification using deep learning approaches: an initiative towards a large open source drone database” (Al-Sa'd et al., 2019).

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Computing Sciences, Qatar University
Contributors: Allahham, M. S., Al-Sa'd, M. F., Al-Ali, A., Mohamed, A., Khattab, T., Erbad, A.
Publication date: 1 Oct 2019
Peer-reviewed: Yes

Publication information

Journal: Data in Brief
Volume: 26
Article number: 104313
ISSN (Print): 2352-3409
Original language: English
ASJC Scopus subject areas: General
Keywords: Anti-drone systems, Classification, Drone identification, UAV detection
Source: Scopus
Source ID: 85071552598

Research output: Contribution to journalArticleScientificpeer-review

Mean and variability in RNA polymerase numbers are correlated to the mean but not the variability in size and composition of Escherichia coli cells

Cell morphology differs with cell physiology in general and with gene expression in particular. We investigate the degree to which these relationships differ with medium richness. Using Escherichia coli cells with fluorescently tagged β' subunits, flow cytometry, and statistical analysis, we study at the single-cell level the correlation between parameters associated to cell morphology and composition (FSC, SSC, and Width channels) and GFP tagged RNA polymerase (RNAp) levels (FITC channel). From measurements in three media differing in richness (M63, LB, and TB) and, thus, cell growth rates, we find that the mean and cell-to-cell variability in RNAp levels are correlated to the mean values of FSC, SSC, and/or Width. Further, in all growth conditions considered, RNAp levels are positively correlated to FSC, SSC, and Width at the single-cell level, with the correlation decreasing for increasing medium richness. Overall, the results suggest that the mean and cell-to-cell variability in levels of RNAp, a master regulator of gene expression, are correlated to the mean values of the parameters assessing the cellular morphology and composition, as measured by flow cytometry, but they do not correlate to the degree of variability of these parameter values.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Laboratory of Biosystem Dynamics-LBD, BioMediTech, Department of Chemistry and Bioengineering
Contributors: Almeida, B., Chauhan, V., Kandavalli, V., Ribeiro, A.
Number of pages: 8
Pages: 226-233
Publication date: 2019

Host publication information

Title of host publication: BIOINFORMATICS 2019 - 10th International Conference on Bioinformatics Models, Methods and Algorithms, Proceedings; Part of 12th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2019
Publisher: SCITEPRESS
Editors: De Maria, E., Gamboa, H., Fred, A.
ISBN (Electronic): 9789897583537
ASJC Scopus subject areas: Biomedical Engineering, Electrical and Electronic Engineering
Keywords: Cell-to-cell Variability, Flow Cytometry, RNA Polymerase, Single-cell Biology, Statistical Analysis
Source: Scopus
Source ID: 85064697521

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

Incoherent Broadband Cavity Enhanced Absorption Spectroscopy Using a Supercontinuum Source in the Mid-IR

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, Research group: Applied Optics, Frontier Photonics
Contributors: Amiot, C. G., Aalto, A., Toivonen, J., Genty, G.
Number of pages: 2
Publication date: 2015

Host publication information

Title of host publication: Laser Science 2015 : Proceedings Frontiers in Optics 2015
Article number: JTu4A-80
ISBN (Electronic): 978-1-943580-03-3
Source: Bibtex
Source ID: urn:0317892665660f6764692e18288f7f3d

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

Incoherent Broadband Cavity Enhanced Absorption Spectroscopy with a Supercontinuum Source

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research group: Nonlinear Fiber Optics, Research area: Optics, Research group: Applied Optics
Contributors: Amiot, C., Aalto, A., Genty, G., Toivonen, J.
Pages: CH_P_16
Publication date: 2015

Host publication information

Title of host publication: 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference : Proceedings
Publisher: Optical Society of America
ISBN (Electronic): 978-1-4673-7475-0
Source: Bibtex
Source ID: urn:c56367a4bf927ab34e30bddeb94639e4

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

Mid-Infrared Sources for Ultra-Broadband Cavity Enhanced Spectroscopy

We developed an all-fiber based supercontinuum source spanning from 900 to 3700 nm. We performed incoherent broadband cavity enhanced absorption spectroscopy using that source and were able to detect multicomponent simultaneously.

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, Research group: Applied Optics
Contributors: Amiot, C. G., Ryczkowski, P., Aalto, A., Toivonen, J., Genty, G.
Number of pages: 2
Publication date: Oct 2016

Host publication information

Title of host publication: Frontiers in Optics 2016
Publisher: OSA
Article number: FTh5A.3
ISBN (Electronic): 978-1-943580-19-4

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

On Design and Development of Super-FRS main tunnel Remote Handling System Concept

The Super Fragment Separator (Super-FRS) main tunnel at the Facility of Antiproton and Ion Research (FAIR) consists of 11 focal planes with vacuum chamber to perform physics experiments. Four of the vacuum chambers at four different focal planes contain activated beamline inserts that requires remote maintenance. The remote maintenance will be performed using automated equipment that can safely conduct remote manipulation on to the activated beamline inserts. In this paper we discuss the conceptual design and development process for the remote handling (RH) system to be used in the Super-FRS main tunnel environment. The RH system for Super-FRS main tunnel is presented here along with conceptual design phase methodology. The main features of the new concept design are to utilize the state of the art of the shelf technologies and products from the industry, which in accordance to Super-FRS needs and requirements to make it more reliable and available during the remote maintenance tasks. The selected design concept are verified with virtual reality simulations and are fulfilling the requirements defined during the concept design phase, including structural, assembly sequence, safety and reliability

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Mobile manipulation, GSI Helmholtz Ctr Heavy Ion, FRS Dept, GSI Helmholtz Ctr Heavy Ion, FRS Dept, Super FRS Target Area, GSI Helmholtz Ctr Heavy Ion, FRS Dept, Super FRS Facil
Contributors: Amjad, F., Weick, H., Mattila, J., Kozlova, E., Schloer, C.
Number of pages: 7
Pages: 188-194
Publication date: 2014

Host publication information

Title of host publication: 2014 IEEE 17th International Conference on Intelligent Transportation Systems (ITSC), 8-11 Oct. 2014, Qingdao
Publisher: IEEE
ISBN (Print): 978-1-4799-6078-1
Keywords: Super-FRS, beamline inserts, Remote Handling, FAIR, FRAGMENT SEPARATOR FRS, GSI

Bibliographical note

EXT="Amjad, Faraz"

Source: WOS
Source ID: 000357868700047

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

Knowledge Management and Emerging Collaborative Networks in Tourism Business Ecosystems

If we critically look at the evolution of the Tourism Industry (TI), we can note that, in the past decade, nothing has changed as much as ICTs and the Internet which caused an extensive transformation of the TI. Both demand and supply of ICT, together with innovation in transportation and international trade agreements, have evolved the tourism sector in operational workflows, management and marketing of new of tourism experiences. The massive use of new technologies has facilitated the rise of new flat organizational models where traditional brokers have disappeared, replaced by direct connections between local providers and tourists, or they have been reconfigured into new forms of dynamic and web-based tourism package providers. The depicted industry evolution shows potential, unthinkable just a few years ago, for local service providers usually marginalized from main tourism flows, due to their small sizes, and who are unable to compete in the globalized market. In many regions characterized by a niche tourism vocation, local tourism operators have started organizing themselves spontaneously in Collaborative Networks in order to create aggregate tourism offers that are able to compete with big tourism operators thus transforming regions with potential and vocation in real tourism destinations. The main socialeffect of instantiating these tourism partnerships, is the stimulus towards Tourism Business Ecosystems (TBEs) giving local tourism service providers a means for economic growth. The aim of this paper is to describe how the organizational paradigm of CNs, applied to the TBEs knowledge management and supported by ICTs, can be the key means for the growth of emerging TBEs. Such models are able to reengineer the tourism destination management model in order to gain much more flexibility in service provision and provide tourists the possibility to live an augmented tourism experience.In this paper we point out that tourism destinations, in an effort to give services able to actively support each phase of the 2.0 tourist lifecycle, can benefit from collaborative network models.

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: Ammirato, S., Michele Felicetti, A., Della Gala, M., Aramo-Immonen, H., Jussila, J.
Number of pages: 7
Pages: 19-26
Publication date: 3 Sep 2015

Host publication information

Title of host publication: Proceedings of the 16th European Conference on Knowledge Management (ECKM 2015), University of Udine, Italy, 3-4 September 2015
Place of publication: Reading, UK
Publisher: Academic Conferences and Publishing International Limited
Editors: Massaro, M., Garlatti, A.
ISBN (Print): 978-1-910810-46-0
ISBN (Electronic): 978-1-910810-47-7
Keywords: tourism business ecosystem, collaborative network, ICT, tourist 2.0 lifecycle

Bibliographical note

ORG=pla,0.5
ORG=tlo,0.5

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

Growth of Urban Peripheries with Reference to Inconsistent Spatial Planning Policies: South-east Amman as case study

The rapid random spatial growth of the urban peripheries of Amman calls for an immediate reconsideration of the enforced planning policies that govern the spatial growth of those settlements. However, an overall assessment of the current planning mechanisms is urgently needed.
The article addresses some spatial factors which are impacting the peripheral growth at the south-eastern edge of Amman. It includes the urban land policies that are generated by Greater Amman Municipality GAM.The adoption of decentralization as a prevailing framework for urban policy in the latter two GAM
master plans forms a turning point at the planning level. Such concept has evolved through the application of rigid frameworks that culminated into complex urban superposition.
This study deals with a marginal settlement which lies at the south-eastern edge of the Greater Amman Municipality, i.e. Muwaqqer. The analysis intends to explore how Muwaqqer has expanded randomly,
testing in the meantime the relationship between Amman city core and its peripheral settlements both spatially and functionally. Light shall also be shed on the two major master plans of GAM: The Greater Amman Comprehensive and Development Plan (GACDP) of 1986, and the Amman Master Plan:
Metropolitan Growth of 2008, tackling their impact on the peripheral district in question.
The study proposes some feasible planning measures to pave the way for better control of the rapid urban growth at the peripheral areas with the aim to mitigate the negative aspects which adversely affecting the urban structure of Amman.
However, the paper also examines the urban transformation of the chosen settlement which further aggravates the multi-jurisdictional divisions that initially meant to sustain an urban uniformity for a modern Amman entity.

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: University of Jordan, Architectural department, Hashemite University, Zarqa-Jordan
Contributors: Amr, A., Saad, M.
Number of pages: 15
Pages: 54-68
Publication date: Mar 2015
Peer-reviewed: No

Publication information

Journal: European International Journal of Science and Technology
Volume: 4
Issue number: 3
Article number: 3
ISSN (Print): 2304-9693
Original language: English
ASJC Scopus subject areas: Urban Studies, Geography, Planning and Development, Architecture
Keywords: urban planning, Urban areas, Urban development, regional development, timber construction, innovation network, development platform, Urban form, urban processes

Research output: Contribution to journalArticleScientific

Emotion-Gauge: Analyzing affective experiences in B2B customer journeys

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, Tampere University of Applied Science
Contributors: Andersson, T., Boedeker, M., Vuori, V.
Number of pages: 6
Pages: 31-36
Publication date: 2017

Host publication information

Title of host publication: Strategic Innovative Marketing : 5th IC-SIM, Athens, Greece, September 23-26, 2016
Publisher: Springer
Editors: Kavoura, A., Sakas, D., Tomaras, P.
ISBN (Print): 978-3-319-56287-2
ISBN (Electronic): 978-3-319-56288-9

Publication series

Name: Springer Proceedings in Business and Economics
ISSN (Print): 2198-7246

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

Kosteus- ja mikrobivaurioiden laajuus kuntien rakennuksissa

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, Research area: Structural Engineering
Contributors: Annila, P., Hellemaa, M., Suonketo, J., Pentti, M.
Number of pages: 6
Pages: 95-100
Publication date: 11 Mar 2015

Host publication information

Title of host publication: Sisäilmastoseminaari 2015 SIY Raportti 33, Messukeskus, Helsinki 11.3.2015
Place of publication: Juva
Editors: Säteri, J., Ahola, M.
ISBN (Print): 978-952-5236-43-9

Publication series

Name: SIY Raportti
Volume: 33

Bibliographical note

AUX=rak,"Hellemaa, Matti"

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

Valtion tukemien homekorjaushankkeiden arviointi -jatkotutkimus (HKPro 3)

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, Research area: Structural Engineering
Contributors: Annila, P., Marttila, T., Kero, P., Suonketo, J., Pentti, M.
Number of pages: 6
Pages: 107-112
Publication date: 11 Mar 2015

Host publication information

Title of host publication: Sisäilmastoseminaari 2015 SIY Raportti 33, Messukeskus, Helsinki 11.3.2015
Volume: Sisäilmayhdistys raportti 33
Place of publication: Juva
Editors: Säteri, J., Ahola, M.
ISBN (Print): 978-952-5236-43-9

Publication series

Name: 
No.: 33
Name: Sisäilmayhdistys

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

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

Kosteusvaurioiden vakavuus kuntien rakennuksissa

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Service Life Engineering of Structures, Research area: Structural Engineering, Research group: Building Physics
Contributors: Annila, P., Lahdensivu, J., Suonketo, J., Pentti, M., Laukkarinen, A., Vinha, J.
Number of pages: 6
Pages: 135-140
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: 1
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

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

Managing Cultural Knowledge in Project Execution

The purpose of this study was to explore the factors through which the project implementation phase could be enhanced by cultural knowledge. The importance of studying this subject is that the exploitation of cultural knowledge (Hofstede & Hofstede 2005, Schwartz 1999, Ng et al. 2006, Hall 1976, Lewis 2006) and competence (Koskinen 2001) is still limited in the constantly increasing project-based business (Turner 1999, Artto et al. 2011, PMBOK 2004) in the international field. Two objectives exist in this study: understanding project complexity through the main challenges in project implementation and evaluating the impacts of the cultural factors behind them.We propose the multiple case study approach (Eisenhard & Graebner 2007, Yin 2014). The prominence of cultural knowledge in project implementation is difficult to determine, so the research design has exploratory features. Case project A was implemented in Sub- Saharan Africa and Case project B in the Near East. Interviewed managers worked either from distance and only visited the target country periodically or represented the perspective of an operational level manager working in the host country. The main cultural challenges that occurred in the projects are defined by these interviewees.This methodology gives evidence of the main challenges in the two case projects and clarifies the multiplicity of cultural issues in the project context. The importance of thesubject was highlighted and the interviewed managers demonstrated that cultural knowledge can offer benefits. Numerous studies exist concerning the challenges in the project business (Deresky 2014, Turner 1999).The outcomes of the research stressed the uniqueness of projects and the situational need for cultural knowledge. The results highlighted the pervasive nature of culture in the international playing field. Companies are obliged to adjust their operations according to environments with multifaceted requirements. National cultures not only prevail within the borders of geographical areas, but are also reflected in company procedures. Therefore, their overall impact needs to be considered in international projects.

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: Aramo-Immonen, H., Hietaoja, H., Jussila, J. J., Ammirato, S.
Number of pages: 12
Pages: 1085-1096
Publication date: 2015

Host publication information

Title of host publication: 10th International Forum on Knowledge Asset Dynamics, IFKAD 2015, Bari, Italy : Culture, Innovation and Entrepreneurship: connecting the knowledge dots
Volume: 10
Place of publication: Bary
Publisher: IKAM Centro Studi & Ricerche
ISBN (Electronic): 978-88-96687-07-9
Keywords: Project management, Cultural Knowledge, Project execution, Developing country, Multicultural projects

Bibliographical note

ORG=pla,0.5
ORG=tlo,0.5

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

Meeting radical change: SMEs and innovation capabilities and strategic foresight

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations, University of Örebro Business School, University of Exeter Business School, Tampere Univ Technol, Tampere University of Technology
Contributors: Aramo-Immonen, H., Bessant, J., Heinonen, T., Öberg, C., Trifilova, A.
Publication date: 16 Jun 2015

Host publication information

Title of host publication: The Proceedings of the XXVI ISPIM Conference – Shaping the Frontiers of Innovation Management, Budapest, Hungary on 14-17 June 2015
Publisher: International Society for Professional Innovation Management ISPIM
ISBN (Print):  978-952-265-779-4

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

If you know social media, you see opportunities…

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Business Ecosystems, Networks and Innovations, Industrial and Information Management, Research group: Business Data Research Group
Contributors: Aramo-Immonen, H., Vartio, M., Jussila, J.
Pages: 575-584
Publication date: 7 Jun 2017

Host publication information

Title of host publication: 12th International Forum on Knowledge Asset Dynamics : Knowledge Management in the 21th Century: Resilience, Creativity and Co-creation
Volume: 12
ISBN (Electronic): 978-88-96687-10-9
Keywords: social media

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

On the regularisation property of the Kachanov-Rabotnov continuum damage model - a finite element study

In this paper the regularising properties of the Kachanov-Rabotnov type continuum damage constitutive model are studied using a simple one-dimensional dynamic problem. It is found that the width of the localisation zone is independent of the mesh size if the loading rate is below a certain threshold value.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering, Research group: Earth Constructions, Research group: Structural Mechanics, The University of Sheffield, VTT
Contributors: Askes, H., Hartikainen, J., Kolari, K., Kouhia, R., Saksala, T., Vilppo, J.
Number of pages: 4
Pages: 43-46
Publication date: Oct 2019

Host publication information

Title of host publication: Proceedings of the 32nd Nordic Seminar on Computational Mechanics
Publisher: University of Oulu
Editors: Niemi, A., Koivurova, H.
ISBN (Electronic): ISBN 978-952-62-2420-6

Publication series

Name: Raportti / Oulun yliopisto, Konetekniikka
No.: 9
ISSN (Electronic): 2342-2599

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

Instrumentation and monitoring of large-span culvert built under a railway, in Finland

Large span soil-steel culverts are rarely used in Finland as vehicular under-passes. The large span and low soil cover height together with high traffic loads place high demands on the construction of culvert backfills. Traffic-induced stress changes and the fatigue resistance of the plates play a major role in the endurance of a culvert. According to design calculations, the most critical section of the culvert is the crown. For this reason, the focus of this project is on the assessment of the structural behaviour and perfor-mance of the crown area under influence of traffic load. The structural per-formance of the culvert was verified by monitoring stress changes and de-formations under live railway traffic, which proved the suitability of the multi-plated culvert built under a railway.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering, Research group: Vaativat rakenteet
Contributors: Asp, O., Laaksonen, A.
Number of pages: 8
Pages: 53-60
Publication date: 24 Apr 2017

Host publication information

Title of host publication: Archives of Institute of Civil Engineering : 3rd European Conference on Buried Flexible Steel Structures, Rydzyna, Poland, 24-25 April 2017
Volume: 2017
Place of publication: Poznan
Publisher: Wydawnictwo Politechniki Poznanskiej
Editors: Madaj, A., Jankowiak, I.
Edition: 23

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

Electro-optic steering of random laser emission in liquid crystals

Using an external low-frequency electric field applied to dye-doped nematic liquid crystals, we demonstrate that random lasing obtained by optical pumping can be steered in an angular direction by routing an all-optical waveguide able to collect the emitted light. By varying the applied voltage from 0 to 2 V, we reduce the walk-off and sweep the random laser guided beam over 7 degrees.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Physics, Research group: Nonlinear Optics, University of Rome Roma Tre, University “Roma Tre”
Contributors: Assanto, G., Perumbilavil, S., Piccardi, A., Kauranen, M.
Number of pages: 3
Pages: 103-105
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Photonics Letters of Poland
Volume: 10
Issue number: 4
ISSN (Print): 2080-2242
Ratings: 
  • Scopus rating (2018): CiteScore 0.52 SJR 0.214 SNIP 0.348
Original language: English
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials
Source: Scopus
Source ID: 85062032353

Research output: Contribution to journalArticleScientificpeer-review

Gain Scheduling Full State Feedback with D-Implementation for Velocity Tracking of Hydrostatic Drive Transmission

This paper presents a gain-scheduling based velocity controller for hydrostatic drive transmissions (HSD). We design our controller based a model of the system which captures most of the nonlinear effects and parameter variation. Therefore, we can obtain much better performance compared to existing linear controllers. Our control strategy is based on full state feedback whose gains are scheduled on measured states which are speed and volume pressures, and estimated hydraulic flow. To implement standard state feedback, we would need to calculate operating points of all the states at all time. However, due to modelling uncertainty (specially unknown frictions) pressure equilibrium calculation will be very inaccurate. We will employ D implementation methodology to remedy this problem.

For the proof of concept, we show the efficacy of the controller using a validated simulator of a wheel loader with real machine parameters. The experiments are performed both on flat terrain and slope. The results demonstrate that the performance of velocity tracking is high and the controllability of the machine is maintained in every situation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Field robotics and control, Research group: Fluid power automation in mobile machines
Contributors: Backas, J., Ghabcheloo, R., Huhtala, K.
Number of pages: 12
Pages: 64-75
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 (Print): 978-952-15-3529-1

Bibliographical note

J. Backas, R. Ghabcheloo, K. Huhtala, "Gain Scheduling Full State Feedback with D-Implementation for Velocity Tracking of Hydrostatic Drive Transmission", 14th Scandinavian International Conference on Fluid Power, May 2015, Tampere/Finland

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

Effect of radiation inside square hollow section under moderate non-symmetric fire

The temperature calculation of hollow steel sections at elevated temperatures is a well-documented and standard procedure. Through this standard procedure, the temperature can be calculated by assuming a uniform gas temperature all around the section, which is called a symmetric fire in this paper. Embedding in surrounding structures or connecting to another steel member results in non-symmetric heat distribution in the member. This non-symmetricity of the surrounding temperature may cause surface-to-surface heat radiation inside the
member, thus affecting the steel section temperature distribution. This effect is considered in this paper by adopting analytical and finite element method analysis.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Metal and Light-wight structures, Research group: Metal and Light-wight structures
Contributors: Baczkiewicz, J., Pajunen, S., Heinisuo, M.
Number of pages: 6
Pages: 25-30
Publication date: 27 Jul 2018
Peer-reviewed: Yes

Publication information

Journal: Fire Research
Volume: 2
Issue number: 1
Article number: 2:42
ISSN (Print): 2532-4748
Original language: English
Keywords: Steel member, Hollow section, Heat transfer, Radiation

Research output: Contribution to journalArticleScientificpeer-review

Internet of Things, Smart Spaces, and Next Generation Networks and Systems: 15th International Conference, NEW2AN 2015, and 8th Conference, ruSMART 2015, St. Petersburg, Russia, August 26-28, 2015, Proceedings

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Electronics and Communications Engineering, Research group: Emerging Technologies for Nano-Bio-Info-Cogno, Wireless Communications and Positioning (WICO)
Contributors: Balandin, S. (ed.), Andreev, S. (ed.), Koucheryavy, Y. (ed.)
Publication date: 2015

Publication information

Publisher: Springer International Publishing
ISBN (Print): 978-3-319-23125-9
ISBN (Electronic): 978-3-319-23126-6
Original language: English

Publication series

Name: Lecture Notes in Computer Science
Volume: 9247
ISSN (Print): 0302-9743

Bibliographical note

JUFOID=62555

Research output: Book/ReportAnthologyScientificpeer-review

How mono-valent cations bend peptide turns and a first-principles database of amino acids and dipeptides

In this contribution we detail our efforts to investigate the structural effects of cations binding to peptides and amino acids. We perform first-principles studies employing long-range dispersion-corrected approximate density-functional theory and compare to gas-phase experiments.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Physics, Research area: Computational Physics, Computational Science X (CompX), Fritz Haber Institute of the Max Planck Society, COMP Centre of Excellence, Department of Applied Physics, Aalto University, Duke University
Contributors: Baldauf, C., Ropo, M., Blum, V., Scheffler, M.
Number of pages: 2
Pages: 119-120
Publication date: 6 Oct 2014

Host publication information

Title of host publication: International Conference of Computational Methods in Sciences and Engineering 2014 (ICCMSE 2014)
Volume: 1618
Publisher: American Institute of Physics Inc.
Editors: Simos, T. E., Kalogiratou, Z., Monovasilis, T.
ISBN (Print): 9780735412552

Publication series

Name: AIP Conference Proceedings
Volume: 1618
ISSN (Print): 0094-243X
ASJC Scopus subject areas: Physics and Astronomy(all)
Keywords: benchmarks, conformation database, density-functional theory, Peptide conformation, theoretical vibrational spectroscopy
Source: Scopus
Source ID: 84947544071

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

What's inside a rubble pile asteroid? DiSCUS - A tomographic twin radar Cubesat to find out

A large fraction of asteroids with diameter d > 240 m are suspected to be loose piles of rocks and boulders bound together mainly by gravity and only weak cohesion. Still to date the size and distribution of voids and monolithic fragments inside these "rubble-piles" are not known. To perform a full tomographic interior reconstruction a bistatic CubeSat configuration has been investigated by Tampere University of Technology (TUT), Radar Systemtechnik GmbH (RST) and the Max Planck Institute for Solar System Research (MPS). The concept is based on two 6U CubeSats, both carrying an identical 1U sized stepped frequency radar. As stepped frequency radars can be built compact, require less power and generate less data volume compared to other radar applications they are well-suited for small satellite platforms. In 2017 the Concurrent Design Facility of ESA/ESTEC conducted two studies relevant for DISCUS. In the Small Planetary Probes (SPP) study DISCUS served as a reference payload for a piggyback mission to a Near-Earth Asteroid (NEA) or even a Main Belt Asteroid (MBA). The M-ARGO study investigated a stand-alone mission to a NEA, with a DISCUS sized instrument. Based on the spacecraft design of SPP and M-ARGO we could prove the instrument requirements as feasible and evaluate our science case from the orbits and mission duration that have been identified by these studies. Using inversion methods developed for medical tomography the data would allow to reconstruct the large scale interior structure of a small body. Simulations have shown that the measurement principle and the inversion method are robust enough to allow full reconstruction of the interior even if the orbits do not cover the entire surface of the asteroid. The measurement results of the mission will help to gain a better understanding of asteroids and the formation mechanisms of the solar system. In addition, the findings will increase the predictability of asteroid impact consequences on Earth and improve future concepts of asteroid deflection.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, Research group: Inverse Problems, Max Planck Institute for Solar System Research, GomSpace A/S, 3D Profi GmbH, RST Radar Systemtechnik AG, University of Bern, MEW-Aerospace UG, GMV Innovating Solutions S.L, Royal Observatory of Belgium
Contributors: Bambach, P., Deller, J., Martel, J., Vilenius, E., Goldberg, H., Sorsa, L., Pursiainen, S., Takala, M., Wurster, A., Braun, H. M., Lentz, H., Jutzi, M., Wittig, M., Chitu, C. C., Ritter, B., Karatekin, O.
Publication date: 2018

Host publication information

Title of host publication: 69th International Astronautical Congress, IAC 2018

Publication series

Name: Proceedings of the International Astronautical Congress, IAC
ISSN (Print): 0074-1795
ASJC Scopus subject areas: Aerospace Engineering, Astronomy and Astrophysics, Space and Planetary Science

Bibliographical note

jufoid=85566

Source: Scopus
Source ID: 85065313725

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

LTCC-Based Multi-Electrode Arrays for 3D in Vitro Cell Cultures

Current technologies to monitor neuronal cultures in vitro are based on 2-dimensional (2D) multi-electrode arrays and cell cultures. The complexity of actual high-level neurobiological systems requires 3-dimensional (3D) cultures and 3D electrode arrays to improve our understanding of such systems. The realization calls for smart multilayer and packaging technology. Our approach uses low-temperature cofired ceramics (LTCC) for the design of a 3-dimensional multi-electrode array (3D MEA). An LTCC multilayer board with gold electrodes forms the basis of the system. The layout of the 3D MEA is designed to fit into widely used measurement adapters for 2D signal recordings, enabling data processing identical to that of established chips. Design and manufacturing of the new 3D device as a basic tool for the investigation of 3D cell cultures are described. Features of thick-film gold electrodes are characterized by means of microscopic and spectroscopic tools complemented with complex impedance measurements. Possible biological applications for in vitro electrophysiological measurements were evaluated based on cell cultures of primary neurons, seeded directly to the chip surface. It was shown that activity can be measured over six months.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Computational Biophysics and Imaging Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), TU Ilmenau, Technische Universitat Ilmenau, Inst Mikro & Nanotechnologien MacroNano, ETH, Swiss Federal Institute of Technology Zurich, Inst Biomed Engn, Lab Biosensors & Bioelect
Contributors: Bartsch, H., Himmerlich, M., Fischer, M., Demko, L., Hyttinen, J., Schober, A.
Number of pages: 10
Pages: 315-324
Publication date: Dec 2015
Peer-reviewed: Yes

Publication information

Journal: Journal of Ceramic Science and Technology
Volume: 6
Issue number: 4
ISSN (Print): 2190-9385
Ratings: 
  • Scopus rating (2015): CiteScore 0.53 SJR 0.237 SNIP 0.434
Original language: English
Keywords: Low-temperature cofired ceramics (LTCC), three-dimensional hybrid multi-electrode array (3D MEA), in vitro cell culture, thick-film gold electrode, primary neuron culture, GROWTH
Source: WOS
Source ID: 000367422100010

Research output: Contribution to journalArticleScientificpeer-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

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

Modeling the process of dynamic resource sharing between LTE and NB-IoT services

The Internet of Things (IoT) undergoes fundamental changes, expanding its infrastructure with more advanced and mobile devices. As the IoT develops, the existing cellular communication technologies often do not provide sufficient coverage while modern IoT terminals are often expensive and characterized by a short battery life. To address these issues, in Release 13 (LTE Advanced Pro) published in 2016, 3GPP consortium has proposed the Narrow-Band IoT (NB-IoT) technology as an efficient way to provide a wide range of new capabilities and services in a wireless cellular network. Having specified three operational regimes, 3GPP did not provide guidelines on the way resource sharing has to be done between LTE and NB-IoT traffic. In this paper, the in-band NB-IoT service model is presented, where a certain amount of LTE radio resources are exclusively allocated to LTE and NB-IoT users while the rest are shared between them. We analyze the proposed system for performance metrics of interest including NB-IoT and LTE session drop probabilities and resource utilization.

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, Peoples’ Friendship University of Russia, Russian Academy of Sciences, Department of Applied Probability and Informatics, Institute of Informatics Problems
Contributors: Begishev, V., Samuylov, A., Moltchanov, D., Samouylov, K.
Number of pages: 12
Pages: 1-12
Publication date: 2017

Host publication information

Title of host publication: Distributed Computer and Communication Networks - 20th International Conference, DCCN 2017, Proceedings
Publisher: Springer Verlag
ISBN (Print): 9783319668352

Publication series

Name: Communications in Computer and Information Science
Volume: 700
ISSN (Print): 1865-0929
ASJC Scopus subject areas: Computer Science(all)
Keywords: Analytical model, Internet of things, NB-IoT (narrow band IoT), Resource sharing, Session drop probability
Source: Scopus
Source ID: 85029718143

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

Need of Services and Understanding of Service Providers in Water and Sanitation: A Case of Ethiopia

Water and sanitation services are basic requirements for the development of a nation. The provision of these services should necessarily be arranged by the national government through policies, and long-term and short-term plans. Moreover, follow-up of the implementation of principle in policies and plans will determine the service level on the ground. This paper is intended to explore gaps in the policy-making and implementation in the areas of water supply in Ethiopia. Review of Ethiopian water sector policy, universal access plans, growth and transformation plans and other literature are employed to achieve the objective of this paper. Moreover, the experiences of the first author that he acquired during data collection for his doctoral study are taken into account to draw conclusions. Hence, the study shows that standards set at the federal level fail to consider the actual situation on the ground and the experts at implementation level are to interpret some aspects of the policy ambiguously. Therefore, this paper recommends the policy-makers and higher officials to consult the people in charge of putting policies in effect to have contextualized and work for uniform desired- output. Service providers need to understand the notion of the receiving community in order to provide the services that satisfy the users.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Behailu, B. M., Mattila, H.
Number of pages: 10
Pages: 431-440
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
Publisher: Tampere University of Technology
Editors: Nenonen, S., Junnonen, J.
ISBN (Print): 978-952-15-3744-8

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

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

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

Dual-frequency signal processing architecture for robust and precise positioning applications

Availability of new GPS civil signals L2C and L5 along with existed L1C/A signal and Galileo E1/E5/E6 signals has increased the potential ways to generate linear combination of signals to remove ionosphere errors and improve accuracy in carrier integer ambiguity resolution. Conventionally, a linear combination of dual frequency signals has been used to remove first order ionosphere delays incurred in signal propagation path which is a major source of range error. Out of the three civil signals in GPS and Galileo system, L5/E5 signals have advanced signal features such as higher received power, faster chip rate and lower carrier frequency than L1/E1 and L2C/E6 signals. Hence, dual frequency receiver with combination of L1/L5 and E1/E5 signals is more suitable to remove ionosphere delay and get benefit from L5/E5 signal characteristics. However, the major limitation of linear combination of signal observations is an amplification of receiver noise. To get benefit of two frequency signals, a suitable signal processing architecture is needed. By taking advantage of GPS L5/Galileo E5 signal characteristics, a dual frequency signal processing architecture is proposed with an aim to reduce the ionosphere-free signal observation noise and to enhance the L1/E1 signal tracking loop sensitivity. The L1/E1 signal tracking loop sensitivity can be enhanced by Doppler aiding from L5/E5 signal tracking loop. The low noise L5/E5 signal Doppler aid reduces the noise in the L1/E1 signal tracking loop. Moreover, two frequency signals tracked with common Doppler estimate will have common observation errors, which will get cancel in linear combination of observations i.e. ionosphere-free, wide-lane etc. Further, code phase observations can be smoothed (Hatch filter) using carrier phase observations. The carrier phase observations are limited by cycle slip. Hence, we have investigated an optimum combination of divergence-free and ionosphere-free pseudorange smoothing using dual-frequency carrier Doppler observations for GPS L1/L5 and Galileo E1/E5 signals. The cycle slip in carrier phase observations can be neglected in carrier Doppler observations. The proposed signal processing architecture incorporated in GPS L1/L5 and Galileo E1/E5 dual frequency receiver will ensure robust signal tracking and minimum pseudorange errors, suitable to a range of high accuracy standalone and code differential positioning applications. The performance of the proposed dual frequency signal processing architecture is evaluated with GPS L1/L5 signals collected from Block-IIF satellites.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering, Faculty of Electronics and Instrument Engineering, Samara National Research University
Contributors: Bolla, P., Lohan, E.
Number of pages: 9
Pages: 72-80
Publication date: 5 Jun 2018

Host publication information

Title of host publication: 2018 IEEE/ION Position, Location and Navigation Symposium, PLANS 2018
Publisher: IEEE
ISBN (Electronic): 9781538616475
ASJC Scopus subject areas: Automotive Engineering, Aerospace Engineering, Control and Optimization
Keywords: Carrier Doppler smoothing, Doppler aiding, Dual-frequency, Hatch filter

Bibliographical note

EXT="Bolla, Padma"
jufoid=72638

Source: Scopus
Source ID: 85048871323

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

Potentials of web standards for automation control in manufacturing systems

Web standards developed mainly by W3C and OASIS shape general IT domain and its applications. Due to the scale of web applications, the web standards have matured to deal with the typical situations of finding the right node on the network, reconfiguring the routing for messaging, using common standards for representing graphical information and many others. Industrial manufacturing can benefit from the web standards due to the interoperability and simplified application integration. This article reviews the current use of web standards in the industrial automation domain. In addition, the manuscript describes and discusses the potentials of using web standards at all the levels of automation system: from high level web-based user interfaces to the industrial controllers, which are located in the lowest layer of the well known automation pyramid. Aligned with such description, the article presents a framework for Open, Knowledge Driven Manufacturing Execution Systems (OKD-MES), which allows using systematically web standards and technologies in factories

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research group: Factory automation systems technology, Research area: Manufacturing and Automation
Contributors: Borja Ramis, F., Iarovyi, S., Lobov, A., Martinez Lastra, J. L.
Number of pages: 8
Pages: 359-366
Publication date: 2015

Host publication information

Title of host publication: 2015 IEEE European Modelling Symposium
ISBN (Print): 978-1-5090-0206-1

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

Safety, Space and Structure Quality Requirements in Construction Scheduling

Abstract Quality assessment of a construction project schedule can be a challenging task for project stakeholders. A little research work has addressed quality of schedules though a good project schedule can be considered as of the key factors of project success. The development of a reliable and easy to perform construction schedule quality assessment procedure seems to be a challenging task. Since Schedule Health Assessment of a construction project has to be strictly related to process requirements, it is used the3 “S” rule as a starting point and framework for obtaining improved understanding of quality of construction schedules. The 3 “S” are Safety, Space and Structure, meaning that the planned process should provide a safe working environment to construction workers, sufficient space to perform construction activities and the required sequence of construction operations and project phases.The aim of the study is to implement a schedule quality assessment method that takes into account the 3“S” rule of construction process.The 3“S” requirements can be successfully integrated in a Schedule Health Assessment method, but to facilitate their implementation and control a flow-line chart is needed,thus the schedule tool becomes a new requirement for construction schedule quality control.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
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: Bragadin, M. A., Kähkönen, K.
Number of pages: 8
Pages: 407-414
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
Keywords: Construction management, Project Control, Project Scheduling, Quality, Safety.
Source: RIS
Source ID: urn:F0EEB88647642A7A838E1B2E16C028A8

Research output: Contribution to journalArticleScientificpeer-review

Resource – Space Charts for Construction Workspace Scheduling

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
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: Bragadin, M. A., Kähkönen, K.
Pages: 677-688
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016: Volume III - Building Up Business Operations and Their Logic. Shaping Materials and Technologies
Publisher: Tampere University of Technology. Department of Civil Engineering
ISBN (Electronic): 978-952-15-3743-1

Bibliographical note

EXT="Bragadin, Marco A."

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

High-speed manufacturing of antimicrobial paper

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, Abo Akademi University, University of Turku, Center for Functional Materials at Biological Interfaces (FUNMAT)
Contributors: Brobbey, K. J., Haapanen, J., Gunell, M., Mäkelä, J. M., Eerola, E., Saarinen, J. J., Toivakka, M.
Number of pages: 3
Pages: 564-566
Publication date: 2018

Host publication information

Title of host publication: Paper Conference and Trade Show, PaperCon 2018
Publisher: TAPPI Press
ISBN (Electronic): 9781510871892
ASJC Scopus subject areas: Forestry, Plant Science, Industrial and Manufacturing Engineering
Source: Scopus
Source ID: 85060366453

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

Single-frequency 571nm VECSEL for photo-ionization of magnesium

We report the development of an intracavity-frequency-doubled vertical external-cavity surface-emitting laser (VECSEL) emitting at 571 nm for photoionization of magnesium. The laser employs a V-cavity geometry with a gain chip at the end of one cavity arm and a lithium triborate (LBO) crystal for second harmonic generation. The gain chip has a bottom-emitting design with ten GaInAs quantum wells of 7 nm thickness, which are strain compensated by GaAsP. The system is capable of producing up to 2.4 ± 0.1 W (total power in two separate output beams) in the visible. The free-running relative intensity noise was measured to be below −55 dBc/Hz over all frequencies from 1 Hz to 1 MHz. With acoustic isolation and temperature regulation of the laser breadboard, the mode-hop free operation time is typically over 5 hrs. To improve the long-term frequency stability, the laser can be locked to a Doppler-free transition of molecular iodine. To estimate the short-term linewidth, the laser was tuned to the resonance of a reference cavity. From analysis of the on-resonance Hänsch-Couillaud error signal we infer a linewidth of 50 ± 10 kHz. Light at 285 nm is generated with an external build-up cavity containing a β-barium borate (BBO) crystal. The UV light is used for loading 25Mg+ ions in a surface-electrode RF Paul trap. These results demonstrate the applicability and versatility of high-power, single-frequency VECSELs with intracavity harmonic generation for applications in atomic and molecular physics.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, National Institute of Standards and Technology, Time and Frequency Division, Boulder, Colorado
Contributors: Burd, S., Leinonen, T., Penttinen, J., Allcock, D., Slichter, D., Srinivas, R., Wilson, A., Guina, M., Leibfried , D., Wineland, D.
Number of pages: 8
Publication date: 2 Jun 2016

Host publication information

Title of host publication: Proceedings of SPIE : Vertical External Cavity Surface Emitting Lasers (VECSELs) VI
Volume: 9734
Place of publication: San Francisco
Publisher: SPIE
Article number: 973411
ISBN (Electronic): 9781628419696

Publication series

Name: SPIE Conference Proceedings
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics
Keywords: VECSEL, OPSL, SDL, frequency doubling, SHG, ion trapping, single-frequency, photoionization, doppler-free spectroscopy, magnesium

Bibliographical note

JUFOID=71479

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

Upper bound and approximation of random access throughput over chase combining HARQ

Massive MTC (mMTC) scenarios featuring a tremendous number of devices challenge the conventional multiple access protocols, which are mostly based on classic ALOHA algorithms known for their instability at higher loads. While numerous modifications of ALOHA adopt the unrealistic assumption on the fixed number of contending uses, we in this paper study a model where a random number of users activate within the slot. In particular, we explore a modification of ALOHA augmented with the Chase combining HARQ (HARQ-CC) and derive an approximation for and a simple upper bound on the system throughput. While the former perfectly matches the corresponding simulation results for the SNR of up to 10dB, the latter constitutes an increasingly tight limit as the SNR grows. Based on both analytical considerations, the resulting system throughput may be significantly improved with the optimal choice of the transmission probability and code spectral efficiency.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering
Contributors: Burkov, A., Matveev, N., Turlikov, A., Bulanov, A., Gahnina, O., Andreev, S.
Number of pages: 5
Pages: 143-147
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: Decoding, Interference, Nickel, Random variables, Signal to noise ratio, Throughput, Upper bound, ALOHA, Chase combining, Hybrid-ARQ, Random multiple access, system throughput, upper bound

Bibliographical note

INT=elt,"Gahnina, O."
jufoid=72315

Source: Bibtex
Source ID: urn:d2e90d5f230392641b73d327cca99a8a

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

Traceability of essential climate variables through forest stand reconstruction with terrestrial laser scanning

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Mathematics, Research group: MAT Inverse Problems
Contributors: Calders, K., Disney, M., Nightingale, J., Origo, N., Barker, A., Raumonen, P. A., Lewis, P., Burt, A., Brennan, J., Fox, N.
Number of pages: 3
Pages: 122-124
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

Reducing uncertainties in above-ground biomass estimates using terrestrial laser scanning

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Mathematics, Research group: MAT Inverse Problems, Univ Melbourne, University of Melbourne, Melbourne Sch Land & Environm
Contributors: Calders, K., Burt, A., Newnham, G., Disney, M., Murphy, S., Raumonen, P., Herold, M., Culvenor, D., Armston, J., Avitabile, V., Kaasalainen, M.
Number of pages: 3
Pages: 197-199
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

Resonant harmonic generation in AlGaAs nanoantennas using cylindrical vector beams

We use second- and third-harmonic generation with cylindrical vector beams to investigate AlGaAs nanodisks. The nonlinear emission is found to depend strongly on the interplay between tensorial nonlinearities, focal-field symmetries and resonant multipolar excitations.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Photonics, Research group: Nonlinear Optics, Australian National University
Contributors: Camacho-Morales, R., Bautista, G., Zang, X., Xu, L., Turquet, L., Miroshnichenko, A., Lamprianidis, A., Rahmani, M., Neshev, D. N., Kauranen, 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: FF1E.6
ISBN (Electronic): 978-1-943580-42-2
Electronic versions: 
URLs: 

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

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

Manipulating Superparamagnetic Microparticles with an Electromagnetic Needle

Selective, precise, and high-throughput manipulation of individual superparamagnetic microparticles has profound applications in performing location-tailored in vitro biomedical studies. The current techniques for manipulation of microparticles allow only a single particle in the manipulation workspace, or simultaneous transportation of multiple microparticles in batches. In this work, a method based on a robotized electromagnetic needle for manipulation of individual superparamagnetic microparticles within a microparticle population is introduced. By automatically controlling the highly localized magnetic field of the needle, a single microparticle is selectively picked when its neighboring particle is few micrometers away. Supported by the nanometer resolution of the robotic positioner, particles are placed at sub-micrometer precision. This manipulation technique allows the creating of arbitrary patterns, sorting of microparticles based on size and morphology, and transporting of individual microparticles in 3D space. Therefore, this approach has the potential to enable more deterministic and quantitative microanalysis and microsynthesis using superparamagnetic microparticles.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Faculty of Biomedical Sciences and Engineering, Research group: Micro and Nanosystems Research Group, Research group: Bioinspired Materials and Robotics (BMR)
Contributors: Cenev, Z., Zhang, H., Sariola, V., Rahikkala, A., Liu, D., Santos, H. A., Zhou, Q.
Publication date: 2017
Peer-reviewed: Yes

Publication information

Journal: Advanced Materials Technologies
Volume: 3
Issue number: 1
Article number: 1700177
ISSN (Print): 2365-709X
Ratings: 
  • Scopus rating (2017): CiteScore 3.85 SJR 1.241 SNIP 0.99
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Product Upgradability: Towards a Medical Analogy

This paper explored the analogy between the medical area and product design. Many similarities, shared between the genetic mutation permitting human to ensure its survival and the product undergoing the introduction of new technologies to meet the market fluctuation, are found to propose this analogy. From creating genetic reference space to transplant technology into product, fundamental process of survival and evolution will be described and allows the parallel with a product, to understand how the evolution of product respond to future needs. It also ensures the durability of resources in an ecological perspective. We discuss the complexity of establishing the right diagnosis for directing the design to choose the right technology and to enable its future integration into a living product. This uncertainty in the technological maturity but also the integrability of this technology in the current product at first, then in the future will allow its product development. Conclusions for the use of this analogy and the justification to describe "living product" will be drawn.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: IRTES-M3M, Université de Technologie de Belfort-Montbéliard (UTBM)
Contributors: Chapuis, Y., Demoly, F., Coatanéa, E., Gomes, S.
Number of pages: 8
Pages: 148-155
Publication date: 2014

Host publication information

Title of host publication: ADVANCES IN PRODUCTION MANAGEMENT SYSTEMS: INNOVATIVE AND KNOWLEDGE-BASED PRODUCTION MANAGEMENT IN A GLOBAL-LOCAL WORLD, APMS 2014, PT III
Volume: 440
Publisher: Springer-Verlag, Berlin
Editors: Grabot, B., Vallespir, B., Gomes, S., Bouras, A., Kiritsis, D.
Edition: PART 3
ISBN (Print): 9783662447321

Publication series

Name: IFIP Advances in Information and Communication Technology
Publisher: SPRINGER-VERLAG BERLIN
Volume: 440
ISSN (Print): 1868-4238
ASJC Scopus subject areas: Information Systems and Management
Keywords: Changeable product, DFX, Living product, Proactive engineering, Technology introduction, Upgradability
Source: WOS
Source ID: 000360158500019

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

Exploring Attitudes, Knowledge and Competencies for Security Technology: A Cross-Cultural Survey in Higher Education

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Intelligent dexterity for secure networked infrastructure and applications (IDSNIA), Department of Pervasive Computing, Research area: Information security, University of Tampere, University of Patras, 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
Contributors: Chaudhary, S., Zhao, Y., Berki, E., Valtanen, J., Li, L., Helenius, M., Mystakidis, S., Nalam, T., Thapa, R. B.
Number of pages: 8
Pages: 11-18
Publication date: 2015

Host publication information

Title of host publication: 8th International Conference on ICT, Society and Human Beings 2015
ISBN (Print): 978-989-8533-41-8

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

Entropy of weighted graphs with Randić weights

Shannon entropies for networks have been widely introduced. However, entropies for weighted graphs have been little investigated. Inspired by the work due to Eagle et al., we introduce the concept of graph entropy for special weighted graphs. Furthermore, we prove extremal properties by using elementary methods of classes of weighted graphs, and in particular, the one due to Bollobás and Erdös, which is also called the Randić weight. As a result, we derived statements on dendrimers that have been proven useful for applications. Finally, some open problems are presented.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Signal Processing, BioMediTech, Research Community on Data-to-Decision (D2D), Department of Computer Science & Information Systems, University of Limerick, Ireland, College of Computer and Control Engineering, Nankai University, Universität der Bundeswehr München, Department of Mechatronics and Biomedical Computer Science, UMIT, Center for Combinatorics and LPMC-TJKLC
Contributors: Chen, Z., Dehmer, M., Emmert-Streib, F., Shi, Y.
Number of pages: 14
Pages: 3710-3723
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Entropy
Volume: 17
Issue number: 6
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: Extremal value, Graph entropy, Randić weight, Shannon's entropy, Weighted graphs
Source: Scopus
Source ID: 84934300047

Research output: Contribution to journalArticleScientificpeer-review

Fabrication and reliability evaluation of passive UHF RFID T-shirts

In this paper, we present textile antennas fabricated for T-shirt RFID applications by cutting from commercially available electro-textile, by sewing with conductive thread, and by 3D printing with stretchable silver ink on a 100 % cotton fabric. The ready tags with attached ICs are coated with a protective stretchable encapsulant. The wireless performance of the T-shirt tags is evaluated initially as well as after seven washing cycles, followed by nine washing-drying cycles in a household washing and drying machines. The initial read ranges of all kinds of tags, when measured on-body, are around 3.5 meters. Based on the reliability testing results, the coating effectively protects the components from cyclic washing and drying.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Research group: Wireless Identification and Sensing Systems Research Group, Department of Electronic Engineering, City University of Hong Kong
Contributors: Chen, X., He, H., Ukkonen, L., Virkki, J., Lu, Y., Lam, H.
Number of pages: 4
Pages: 1-4
Publication date: 8 Jun 2018

Host publication information

Title of host publication: 2018 IEEE International Workshop on Antenna Technology, iWAT2018 - Proceedings
Publisher: IEEE
ISBN (Electronic): 9781538618516
ASJC Scopus subject areas: Instrumentation, Computer Networks and Communications, Electronic, Optical and Magnetic Materials
Keywords: 3D Printing, electro-textiles, embroidery, passive UHF RFID, T-shirts, textiles, washing, wearable electronics

Bibliographical note

jufoid=79362

Source: Scopus
Source ID: 85050037887

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

Fabrication and Practical Evaluation of Glove-integrated Passive UHF RFID Tags

Passive RFID-based technology is a convincing approach to achieve versatile energy- and cost-efficient wireless platforms for future wearable applications. In this paper, we present passive UHF RFID tags integrated into normal work gloves for wearable RFID applications. We introduce embroidery as a new efficient antenna fabrication method for glove-integrated tags as well as establish reference glove-tag antennas from electro-textiles and copper tape. The performance of the three types of glove-tags is evaluated on a male test subject in an anechoic room and in an office environment. Based on the wireless measurement results, the read ranges of the embroidered glove-tags were around 1 meter in an anechoic chamber and in an office, when measured near the human body. These results meet the requirements of many practical applications of glove-tags, although the read ranges are shorter than those of the electro-textile and copper tape tags that showed read ranges of 2-2.5 meters. Finally, the developed glove-tags were successfully tested in actual use situations for identification and access control. These results are very promising, especially considering the cost effectiveness of embroidered tag antennas and the easiness of their integration into different types of gloves.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Research group: Wireless Identification and Sensing Systems Research Group
Contributors: Chen, X., He, H., Ukkonen, L., Virkki, J., Xu, J., Wang, T., Cheng, L.
Number of pages: 5
Publication date: Sep 2018

Host publication information

Title of host publication: 2018 IEEE International Conference on RFID Technology Application (RFID-TA)
Publisher: IEEE
ISBN (Print): 978-1-5386-5058-5
ISBN (Electronic): 978-1-5386-5057-8
Keywords: anechoic chambers (electromagnetic), radiofrequency identification, textile products, UHF antennas, wearable antennas, passive RFID-based technology, cost-efficient wireless platforms, wearable RFID applications, glove-integrated tags, electro-textile, embroidered glove-tags, practical applications, copper tape tags, embroidered tag antennas, wireless measurement, glove-integrated passive UHF RFID tags, antenna fabrication method, anechoic chamber, Antennas, Copper, Antenna measurements, Meters, Yarn, Frequency measurement, Radiofrequency identification, RFID, wearable antenna, glove-tag, embroidery electronics, electro-textile antenna

Bibliographical note

JUFOID=72031

Source: Bibtex
Source ID: urn:7ff8bf18c5235d84d462120f1392fdd5

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

Performance Enhancement Of Optimized Link State Routing Protocol For Health Care Applications In Wireless Body Area Networks

Wireless Body Area Networks (WBAN) refers to the network of wearable sensor devices on a human body. The data gathered from the devices are sent to the server to take some action during an emergency. The collected data has to be successfully routed to reach the destination for an health care applications in WBAN. Hence selecting the routing protocol plays an important role in WBAN. Several researchers have proposed many routing protocols for WBAN. In this work, a novel proactive routing protocol called Energy Aware Power Save Mode Link State is proposed that modifies the existing Optimized Link State Routing protocol. The mathematical model is defined to select the best multi point relay node in a network that considers the power save mode state. The experiment is conducted using network simulator NS-3 and the result shows the substantial network performance metrics improvement in the proposed model compared to the existing.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering
Contributors: Chetan Kumar, V., Shiva Prakash, S. P., Balandin, S.
Number of pages: 9
Pages: 195-203
Publication date: Nov 2018

Host publication information

Title of host publication: 2018 23rd Conference of Open Innovations Association (FRUCT)
Publisher: IEEE
ISBN (Print): 978-1-5386-6943-3
ISBN (Electronic): 978-9-5268-6536-2
Keywords: Body area networks, Routing protocols, Wireless communication, Peer-to-peer computing, Quality of service, Routing
Source: Bibtex
Source ID: urn:c178e5ef1e338cad17f7c536b89f7cb3

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

Editorial: Experiments in an Organisational Context

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Industrial and Information Management, Copenhagen Business School, Mines ParisTech, London Business School
Contributors: Christiansen, J., Birkinshaw, J., Le Massaon, P., Mäkinen, S.
Number of pages: 2
Publication date: 2017
Peer-reviewed: No

Publication information

Journal: CERN IdeaSquare Journal of Experimental Innovation
Volume: 1
Issue number: 2
ISSN (Print): 2413-9505
Original language: English

Research output: Contribution to journalEditorialScientific

Grammatical and Semantic Disambiguation of Requirements at Elicitation and Representation Stages

The final outcome of a design process depends a lot on the initial conditions of this process. The initial design conditions can be viewed as the initial definition and representation of the design problem in the form of requirement model. Describing the requirements involves considering their elicitation and its transformation in a form that can be further used by engineering designers. These two phases of requirements, elicitation and representation, involve by nature linguistic description. Users, stakeholders or designers express themselves through natural language. Semantics considerations involve understanding aspects that comes down to word selection or connotation but also interpretation aspects of written terms used by communities or persons within particular circumstances and contexts. The present research work is constructed around a central hypothesis: Final design outcomes are strongly dependent on the initial design conditions because of the recursive nature of the design activity.

The present article claims that computer tools can support the disambiguation process associated with elicitation and representation. For this reason the authors have developed an experimental process aiming at reducing ambiguity of the parts of the initial conditions of the design process that are expressed in natural language. This disambiguation is considering several levels: the grammar, words selection and context description.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Intelligent dexterity for secure networked infrastructure and applications (IDSNIA), Aalto Univ, Aalto University, Aalto Univ Finland, Dept Engn Design & Prod, Sch Engn, Aalto Univ, Aalto University, Sch Engn, Dept Engn Design & Prod
Contributors: Christophe, F., Wang, M., Coatanea, E., Zeng, Y., Bernard, A.
Number of pages: 15
Pages: 17-31
Publication date: 2012

Host publication information

Title of host publication:  Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering, 2011, vol 9
Publisher: AMER SOC MECHANICAL ENGINEERS
ISBN (Print): 978-0-7918-5486-0
Keywords: PRODUCT REQUIREMENTS, DESIGN
Source: WOS
Source ID: 000324350600003

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

Integration of evaluation and simulation methods for virtual prototypes

This article combines evaluation and selection of early design concepts into a methodology at different stages of the development process. A web-based evaluation environment to support this methodology has been developed including Kurtoglu's component taxonomy. In addition, the Taguchi's design of experiments approach has been used to virtually assess all feasible combinations generated from Zwicky matrix. This evaluation methodology is applied to the case study of an autonomous robot for Eurobot competition. The virtual environment was useful to provide a fast visual representation of the different robot concepts and their behaviours. This evaluation methodology was compared with AHP and Pareto optimality evaluation methods. The main contribution of this paper is to develop a methodology and a computer tool integrating virtual simulation associated with a design of experiments providing a visual representation of the concepts. These concepts can be simulated according to situations they would face in reality. This enables the evaluation of concepts according to non-subjective criteria and it could assist the decision making process at early design stage. Furthermore, this evaluation method enables preliminary selection in a concurrent manner during the phase of concept generation. The goal is to integrate the entire approach as a web-based platform supporting the early design process. This work is developed for pedagogical purpose in the context of an EU project.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Intelligent dexterity for secure networked infrastructure and applications (IDSNIA), Aalto Univ, Aalto University, Aalto Univ Finland, Dept Engn Design & Prod, Sch Engn, Aalto University
Contributors: Christophe, F., Mokammel, F., Coatanea, E., Bakhouya, M.
Number of pages: 6
Pages: 623-628
Publication date: 2013

Host publication information

Title of host publication: Proceedings of the 15th International Conference on Engineering and Product Design Education: Design Education - Growing Our Future, EPDE 2013
ISBN (Print): 9781904670421
ASJC Scopus subject areas: Industrial and Manufacturing Engineering
Keywords: Design, Design methodologies, Simulation and evaluation, Virtual prototyping
Source: Scopus
Source ID: 84891309348

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

Raitiotien seisakkeet: Yhdyskuntasuunnittelun jatkokurssi A ja B

Vuoden 2014 Yhdyskuntasuunnittelun jatkokurssin aiheena oli Tampereelle toteutettava kaupunkiraitiotie, joka tulee helpottamaan huomattavasti kulkemista Tampereella tulevaisuudessa.

Kurssi oli sisällöltään ja osallistujiltaan epätavanomainen. Osallistujia kurssilla oli useammasta eri tiedekunnasta: Tampereen teknillisen yliopiston arkkitehtiopiskelijoita ja liikennesuunnittelun opiskelijoita, Tampereen yliopistolta psykologian sekä sosiologian opiskelijoita.

Kolmiosaisen kurssin painopiste oli urban design-osuudella, muiden ollessa vapaavalintaisia. Suunnittelukohteina poikkitieteellisesti muodostetuilla ryhmillä oli kolme Tampereen raitiotien yleissuunnitelmassa esitettyä seisaketta: Hakametsä, Turtola ja Hallila. Useat osallistujat olivat valinneet myös planning-osuuden, johon koottiin jäsenistö kunkin seisakkeen design-osuuden ryhmistä.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: School of Architecture, Research group: Urban Planning
Contributors: Chudoba, M. (ed.), Rajaniemi, J. (ed.), Virkkala, J. (ed.)
Number of pages: 74
Publication date: 2015

Publication information

Publisher: Tampere University of Technology, School of Architecture
ISBN (Print): 978-952-15-3456-0
ISBN (Electronic): 978-952-15-3457-7
Original language: Finnish

Bibliographical note

Versio ok 14.12.2015

Research output: Book/ReportCommissioned reportProfessional

Koteja ja kokonaistaideteoksia

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: School of Architecture, Research group: Urban Planning
Contributors: Chudoba, M.
Number of pages: 3
Pages: 76-78
Publication date: 2015
Peer-reviewed: Unknown

Publication information

Journal: Arkkitehti
Issue number: 3
ISSN (Print): 0783-3660
Original language: Finnish

Research output: Contribution to journalArticleProfessional

Systematic Search and Ranking of Physical Contradictions Using Graph Theory Principles: Toward a Systematic Analysis of Design Strategies and their Impacts: TRIZ and Knowledge-Based Innovation in Science and Industry

Abstract This paper presents three interconnected developments made during the course of a recent collective research work, the development of a systematic graph-based search tool for physical contradictions, a ranking approach for defining the order of criticality of the design contradictions and the associated analysis of the different design strategies that can be used to solve those contradictions or to enhance performance indicators. The systematic graph-based search for physical contradictions is using the set of elementary variables necessary to describe the system as basic input. The initial set is extracted based on taxonomy of variables combining classification work from NIST and classification of variables derived from the Bond Graph theory. The contradiction search method is in a second step classifying the set of variables into three categories: the constraint variables imposed to the designers by the context and the environment, the design variables on which the designer as the possibility to act and the performance variables that are used to evaluate the performance of the designed system. In a third step, interactions between variables are searched using two possibilities: a causal ordering algorithm developed during the course of the research or via a collective work of experts. The result of this step is a directed graph starting from the constraints variables and ending with the performance variables. In the fourth step objectives have to be assigned to the performance variables (minimal value, maximal value or target value). Those objectives are propagated back into the graph by analyzing the impact of the variables interacting with the performance variables. A physical contradiction is detected each time it is discovered that a design variable is associated with two contradictory objectives. Following this approach, a contradiction is represented as a node in the directed graph. It is possible to systematically map the different design strategies that can be used and to rank the possible impact of those design strategies. The article presents a concrete application of the approach on the case study of an air bearing and demonstrates the novelty of the approach to generate new viewpoints and insight in the analysis of the early stages of the development process. The potential impact of such type of design support is potentially very important. A future step will consists of developing a computer aided tool implementing the method.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Mechanical Engineering and Industrial Systems, Aalto University, Aalto Univ, Aalto University, Aalto Univ Finland, Dept Engn Design & Prod, Sch Engn
Contributors: Coatanéa, E., Ryynänen, L., Calonius, O., Mokammel, F., Riitahuhta, A.
Number of pages: 18
Pages: 1165-1182
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Engineering
Volume: 131
ISSN (Print): 1877-7058
Ratings: 
  • Scopus rating (2015): CiteScore 0.56 SJR 0.239 SNIP 0.566
Original language: English
Keywords: graph theory, TRIZ, physical contradiction, innovative principles, air bearing

Bibliographical note

EXT="Coatanéa, Eric"
EXT="Riitahuhta, Asko"

Source: RIS
Source ID: urn:4AB62BAC3A0A0D77B9BD9FDFF1D977D4

Research output: Contribution to journalArticleScientificpeer-review

Pedestrian Dead Reckoning with Particle Filter for Handheld Smartphone

Commonly used Global Navigation Satellite Systems (GNSS) are inappropriate as Location Based Services (LBS) in indoor environment. Therefore research teams are developing different systems, which can be used as a suitable alternative. One of options is to use Inertial Navigation System (INS) which consists of inertial sensors and mathematic procedures. This concept has been known for a long time, but with arrival of Microelectro Mechanical System (MEMS) INS found wide use. Smartphones with inertial sensors, such as accelerometers and gyroscopes, allow us to use them as input devices for Pedestrian Dead Reckoning (PDR). In this paper we present PDR by using smartphone sensors. They can be classified as low-cost Inertial Measurement Unit (IMU), and have been compared with more precise and expensive Xsens IMU. Accuracy of inertial sensors has increased in the past few years, but they still cannot alone provide proper accuracy because of many negative effects, such as heading drift due to gyroscope bias. Particle Filter (PF) has been successfully used with map constraints to increase the accuracy of proposed location system. Presented results show that low-cost smartphone IMU combined with PF can be applicable as proper navigation system.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: Computer engineering, Signal Processing Research Community (SPRC), University of Zilina
Contributors: Collin, J., Perttula, A., Parviainen, J., Racko, J., Brida, P.
Number of pages: 7
Publication date: 17 Nov 2016

Host publication information

Title of host publication: 2016 International Conference on Indoor Positioning and Indoor Navigation (IPIN)
Publisher: IEEE
ISBN (Electronic): 978-1-5090-2425-4

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

Single micro-particle scattering detection based on Edge Filter Enhanced Self-Mixing Interferometry

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Research area: Optics, Department of Physics, Research group: Applied Optics
Contributors: Contreras, V., Lonnqvist, J., Toivonen, J.
Pages: CH_P_11
Publication date: 2015

Host publication information

Title of host publication: 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
Publisher: Optical Society of America
ISBN (Electronic): 978-1-4673-7475-0
Source: Bibtex
Source ID: urn:fc7373a93e31bcda04a5098b47eed6aa

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

Systematic Literature Review on Enterprise Architecture in the Public Sector

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: Dang, D., Pekkola, S.
Publication date: 2015

Host publication information

Title of host publication: The 38th Information Systems Research Conference in Scandinavia (IRIS38)
Editors: Öörni, A., Iivari, N., Kuutti, K., Oinas-Kukkonen, H., Rajanen, M.
ISBN (Electronic): 978-952-62-0917-3

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

Enterprise architecture and organizational reform: a project debrief

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Industrial and Information Management, Research group: Business Data Research Group
Contributors: Dang, D., Pekkola, S.
Number of pages: 16
Publication date: 20 Jul 2017

Host publication information

Title of host publication: Proceedings the 21st Pacific Asian Conference on Information Systems 2017 (PACIS’2017) : Langkawi, Malay, 16-20 July, 2017
Publisher: Association for Information Systems AIS

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

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

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

Risk Assessment of Major Storm Situation in Distribution System

Risk and reliability have a significant connection in meaning; both of them are the facts for one inference. High level of risk is resource of lower reliability. Risk management in power system has a variety of different subjects including models, methods and applications. Risk is a mixture of probability of disturbance event and the negative effect of that occurrence. Usually it counted for random accident which has harmful effect on people’s life and environment. In this paper risks study of storm situation modelled. Random failures in power
system are the origin of risk and cannot control by staff. Monte-Carlo Simulation (MCS) has used to model the fault frequencies and outage time of customers. The two tools which use in financial studies to make investment decision and applicable in power systems are Value-at-Risk (VaR) and Conditional Value-at-Risk (CVaR) Result of study compared to the actual reliability which confirm the
improvement in the reliability of system. It is not possible to predict the precise amount of load value, Concerns of power outage in local area and possibility
of a general blackout.

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: Dehghani, N., Supponen, A., Repo, S.
Publication date: 1 Sep 2015

Host publication information

Title of host publication: 2015 50th International Universities Power Engineering Conference (UPEC)
Publisher: IEEE
ISBN (Print): 978-1-4673-9682-0

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

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

Preliminary results from a study aiming to improve ground investigation data

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Foundation Structures, Research area: Infrastructure Construction
Contributors: Di Buo, B., D'Ignazio, M., Selänpää, J., Länsivaara, T.
Number of pages: 11
Pages: 187-197
Publication date: May 2016

Host publication information

Title of host publication: Proceedings of the 17th Nordic Geotechnical Meeting : 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

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

Strength increase below an old test embankment in Finland

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Foundation Structures
Contributors: D'Ignazio, M., Länsivaara, T.
Pages: 357-366
Publication date: May 2016

Host publication information

Title of host publication: The 17th Nordic Geotechnical Meeting : Conference proceedings
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

First principles prediction of the solar cell efficiency of chalcopyrite materials  AgMX2(M=In, Al; X=S, Se, Te)

Using the spectroscopic limited maximum efficiency, and Shockley and Queisser predictor models, we compute the solar efficiency of the chalcopyrites AgMX 2 (M = In, Al; X = S, Se, Te). The results presented are based on the estimation of the electronic and optical properties obtained from first principles density functional theory as well as the many-body perturbation theory calculations. The results from this report were consistent with the experimental data.The optical bandgap was accurately estimated from the absorption spectra, obtained by solving the Bethe and Salpeter equation. Fitting the Tauc's plot on the absorption spectra, we also predicted that the materials studied have a direct allowed optical transition. The theoretical estimations of the solar cell performance showed that the efficiencies from the Shockley and Queisser model are higher than those from the spectroscopic limited maximum efficiency model. This improvement is attributed to the absorption, the recombination processes and the optical transition accounted in the calculation of the efficiency.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Electrical Engineering, University of South Africa, University of Witwatersrand
Contributors: Dongho-Nguimdo, G. M., Igumbor, E., Zambou, S., Joubert, D. P.
Publication date: 1 Dec 2019
Peer-reviewed: Yes

Publication information

Journal: Computational Condensed Matter
Volume: 21
Article number: e00391
ISSN (Print): 2352-2143
Original language: English
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Materials Science (miscellaneous), Condensed Matter Physics, Materials Chemistry
Keywords: Chalcopyrites, First principles, Solar cell efficiency
Source: Scopus
Source ID: 85065198754

Research output: Contribution to journalArticleScientificpeer-review

Investigating Auditory Human-Machine Interaction: Analysis and Classification of Sounds Commonly Used by Consumer Devices

Many common consumer devices use a short sound indication for declaring various modes of their functionality, such as the start and the end of their operation. This is likely to result in an intuitive auditory human-machine interaction, imputing a semantic content to the sounds used. In this paper we investigate sound patterns mapped to "Start" and "End" of operation manifestations and explore the possibility such semantics’ perception to be based either on users’ prior auditory training or on sound patterns that naturally convey appropriate information. To this aim, listening and machine learning tests were conducted. The obtained results indicate a strong relation between acoustic cues and semantics along with no need of prior knowledge for message conveyance.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Research Community on Data-to-Decision (D2D), Aristotle University of Thessaloniki, Technological Educational Institute of Ionian Islands, Ionian University
Contributors: Drossos, K., Kotsakis, R., Pappas, P., Kalliris, G., Floros, A.
Number of pages: 9
Publication date: May 2013

Host publication information

Title of host publication: Audio Engineering Society Convention 134
Publisher: AES Audio Engineering Society
Article number: 8812

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

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

Emergency Voice/Stress - level Combined Recognition for Intelligent House Applications

Legacy technologies for word recognition can benefit from emerging affective voice retrieval, potentially leading to intelligent applications for smart houses enhanced with new features. In this work we introduce the implementation of a system, capable to react to common spoken words, taking into account the estimated vocal stress level, thus allowing the realization of a prioritized, affective aural interaction path. Upon the succesful word recognition and the corresponding stress level estimation, the system triggers particular affective-prioritized actions, defined within the application scope of an intelligent home environment. Application results show that the established affective interaction path significantly improves the ambient intelligence provided by an affective vocal sensor that can be easily integrated with any sensor-based home monitoring system.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Research Community on Data-to-Decision (D2D), Technological Educational Institute of Piraeus, Ionian University, BLUE dev Ltd.
Contributors: Drossos, K., Floros, A., Agavanakis, K., Tatlas, N., Kanellopoulos, N.
Number of pages: 11
Publication date: Apr 2012

Host publication information

Title of host publication: Audio Engineering Society Convention 132
Publisher: AES Audio Engineering Society

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

Sound Events and Emotions: Investigating the Relation of Rhythmic Characteristics and Arousal

A variety of recent researches in Audio Emotion Recognition (AER) outlines high performance and retrieval accuracy results. However, in most works music is considered as the original sound content that conveys the identified emotions. One of the music characteristics that is found to represent a fundamental means for conveying emotions are the rhythm- related acoustic cues. Although music is an important aspect of everyday life, there are numerous non-linguistic and non- musical sounds surrounding humans, generally defined as sound events (SEs). Despite this enormous impact of SEs to humans, a scarcity of investigations regarding AER from SEs is observed. There are only a few recent investigations concerned with SEs and AER, presenting a semantic connection between the former and the listener’s triggered emotion. In this work we analytically investigate the connection of rhythm-related characteristics of a wide range of common SEs with the arousal of the listener using sound events with semantic content. To this aim, several feature evaluation and classification tasks are conducted using different ranking and classification algorithms. High accuracy results are obtained, demonstrating a significant relation of SEs rhythmic characteristics to the elicited arousal.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Ionian University, Aristotle University of Thessaloniki
Contributors: Drossos, K., Kotsakis, R., Kalliris, G., Floros, A.
Number of pages: 6
Pages: 1-6
Publication date: Jul 2013

Host publication information

Title of host publication:  Information, Intelligence, Systems and Applications (IISA), 2013 Fourth International Conference on
Publisher: IEEE
ISBN (Electronic): 978-1-4799-0771-7
Keywords: audio emotion recognition, Sound events, arousal, rhythm related features, audio emotion classification

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

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

Energy Retrofits in Multi-family Buildings in North-east Europe: The Impacts on Thermal Conditions

We have conducted a project to develop a common protocol for indoor environmental quality (IEQ) assessment and to assess the effects of energy retrofits on IEQ. This paper focuses on thermal comfort, which was first assessed based on 2-month continuous monitoring in 16 multi-family buildings (94 apartments) in Finland and 20 buildings (96 apartments) in Lithuania during heating season before retrofits. In addition, corresponding data after retrofits were available from three buildings (17 apartments) from Finland and seven (30 apartments) from Lithuania. Two data loggers per apartment were placed to evaluate Tw and RHw (warm area), and Tc and RHc (coldest spot). Questionnaire data regarding housing quality and health were collected from the occupants. The results before retrofits indicated high Tw (>23 ºC) for a large proportion of time in Finnish apartments, whereas opposite trend was observed in Lithuania. After retrofits, proportion of time with high Tw was higher while proportion of apartments with low RHw was lower in Finland, whereas in Lithuania, about one fourth of the apartments had higher Tw and RHw, hence fulfilling the national guidelines. The average absolute humidity was higher after retrofits in both countries, especially in Lithuania (by 15%). Occupant responses indicated improved thermal comfort. Therefore, potential effects of energy retrofits on occupants’ thermal environment and satisfaction were demonstrated, and simply adjusting indoor temperature could help to save energy. Further analysis is needed to include the effects of outdoor conditions, as well as overall IEQ to the assessment.

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 Hlth Protect, Kaunas Univ Technol, Kaunas University of Technology, Dept Environm Technol
Contributors: Du, L., Leivo, V., Prasauskas, T., Turunen, M., Kiviste, M., Martuzevicius, D., Haverinen-Shaughnessy, U.
Number of pages: 5
Pages: 860-864
Publication date: Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Energy Procedia
Volume: 78
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

Simulation of photon-photon resonance enhanced direct modulation bandwidth of DFB lasers

Simulations and experimental results of high-frequency photon-photon resonance are used to examine the possibilities to extend the direct modulation bandwidth in dual-mode distributed feedback lasers beyond the conventional limit set by the carrier-photon resonance.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, Brighterwave Inc, Politecnico di Torino
Contributors: Dumitrescu, M., Uusitalo, T., Virtanen, H., Laakso, A., Bardella, P., Montrosset, I.
Number of pages: 2
Pages: 147-148
Publication date: 17 Aug 2016

Host publication information

Title of host publication: 16th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2016
Publisher: IEEE
ISBN (Electronic): 978-1-4673-8603-6
ASJC Scopus subject areas: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Modelling and Simulation, Numerical Analysis

Bibliographical note

EXT="Laakso, A."

Source: Scopus
Source ID: 84987641496

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

Sustainable Design Studio 2014

The City of Tampere is experiencing a great regeneration boom. Several central areas are under redevelopment. The Hakametsä area is one of them. The ice hockey hall of Hakametsä and the surrounding commercial areas will be redeveloped in the near future. The identity and integrated sustainable urban solutions unifying the entire Hakametsä area is becoming a key issue.

The Sustainable Design Studio 2014 looked at the opportunities related to sustainable redevelopment of the new city district. In particular, the focus was in the intersection of Hervannan valtaväylä and Sammon valtatie. Currently this intersection divides the area in separate and isolated sections with very scattered street scape and difficult accessibility for light-traffic. The restructuring of the entire city structure could offer several opportunities for more sustainable city district in connection to the new tram line.

The task for the students had to two parts with different objectives and urban scales. The first part included a group work analysis on the Hakametsä area and designing a new urban strategy for a sustainable city district. The lack of overall scheme for the area motivated the students to look at the intersection area as the point for connecting the four sectors divided by Hervannan valtaväylä and Sammon valtatie.

The second individual part of the assignment consisted of designing additional floors to an existing residential building next to the Hakametsä ice hockey rink. The work aimed at creating appealing typological solutions for attractive in-fill architecture thus increasing the opportunities for densification of the 70s residential areas at large. The starting point for the design was the structural system developed in KORKO research project of the Tampere University of Technology. The research project delivered a concept for a prefabricated steel structure allowing fast and affordable assembly of prefabricated wooden housing modules. The objective of the course was to connect university education and research in a mutually benefiting way that is motivating for the students.

The results of the studio provided a comprehensive overview of different approaches to reshape the urban plan for more sustainable city structure. The need for the new character of Hervannan valtaväylä became evident. Should the road be a main artery focusing on delivering the traffic flows, or, is it part of integrated city structure potentially lowering the speeds of vehicles and calling for improved lighttraffic conditions? The students’ works opened up a number of alternative perspectives – including engineering studies on sustainability issues. The Hakametsä area is a great potential for sustainable urban densification within the proximity of the city center, yet with a unique character making it a distinct and identifiable place.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering, School of Architecture
Contributors: Edelman, H. (ed.), Härkönen, K. (ed.)
Number of pages: 79
Publication date: 2015

Publication information

Publisher: Tampere University of Technology. School of Architecture
ISBN (Print): 978-952-15-3473-7
ISBN (Electronic): 978-952-15-3474-4
Original language: English

Bibliographical note

ORG=rak,0.25
ORG=ark,0.75

Research output: Book/ReportCommissioned reportProfessional

Evaluating organizational commitment in support of organizational leadership

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department
Contributors: Einolander, J.
Number of pages: 5
Pages: 668–673
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

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 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

Re-use of engineering design rationale in Finnish SME project based industry

This study presents views on barriers of re-use of engineering design rationale. The research data was gathered by interviewing 29 persons who work in 19 different Finnish SME engineering project based companies. The topic was studied on three main levels: due to actions of business management, due to actions of project team and due to individuals own action. From this perspective, six categories of barriers of tacit knowledge re-use were found: Time management, Tools and ocumentation practices, Working methods, Validity of information, Well-being at work and Distinction in competence.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Mechanical Engineering and Industrial Systems, Research area: Design, Development and LCM, Tampere University
Contributors: Ellman, A., Paronen, J., Juuti, T. S., Tiainen, T.
Number of pages: 8
Pages: 1825-1832
Publication date: 24 May 2018

Host publication information

Title of host publication: Proceedigns of the Design 2018 15th International Design Conference
Publisher: The Design Society
ISBN (Electronic): 978-953-7738-59-4
Keywords: design knowledge, design practice, design management
DOIs: 

Bibliographical note

jufoid=84955

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

Patterns for controlling chaos in a startup

A growing trend in industrial software engineering is that new software products and information services are developed under conditions of notable uncertainty. This is especially visible in startup enterprises which aim at new kinds of products and services in rapidly changing social web, where potential customers can quickly adopt new behavior. Special characteristics of the startups are lack of resources and funds, and startups may need to change direction fast. All these affect the software engineering practices used in the startups. Unfortunately almost 90 percent of all startups fail and goes bankrupt. There are probably indefinite numbers of reasons why startups fail. Failure might be caused by wrongly chosen software engineering practices or inconsiderate decision making. While there is no recipe for success, we argue that good practices that can help on the way to success can be identified from successful startups. In this paper, we present two patterns that startups can consider when entering the growth phase of the lifecycle.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing
Contributors: Eloranta, V.
Number of pages: 8
Pages: 1-8
Publication date: 10 Apr 2014

Host publication information

Title of host publication: VikingPLoP 2014 Proceedings of the 8th Nordic Conference on Pattern Languages of Programs
Volume: 2014-April
Publisher: Association for Computing Machinery
ISBN (Print): 9781450326605

Publication series

Name: ACM International Conference Proceeding Series
ASJC Scopus subject areas: Human-Computer Interaction, Computer Networks and Communications, Computer Vision and Pattern Recognition, Software
Keywords: Lean start-up, Organizational patterns, Patterns, Software engineering, Start-up
Source: Scopus
Source ID: 84940028558

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

Proceedings of VikingPLoP 2013 Conference

This is the proceedings of VikingPLoP 2013 – a record of all papers workshopped during the conference. VikingPLoP is a Nordic conference of pattern languages of programs which took place this year in Horse Inn of Luomajärvi, Ikaalinen, Finland in March 2013. VikingPLoP was organized jointly by Tampere University of Technology and Hillside Europe. VikingPLoP 2013 was also sponsored by Wiley which provided books for the focus group reading session. The conference was organized in Finland for the second time in a row. Previous location in 2012 was in Saariselkä Lapland. In 2013 vikings were moving towards south and chose the Horse Inn in Ikaalinen as the venue as it offered a luxurious opportunity for participants to experience rustic romance, good food, horseback riding, traditional Finnish sauna, the nature, and wilderness tracks. In March the landscape was still covered in snow making the landscape ruggedly beautiful.

The papers in this proceedings book are updated versions of the papers workshopped in the conference. In the beginning, participants submitted their papers for shepherding process. In the shepherding process, the shepherd, an experienced pattern writer, gave ideas and feedback for the author, colloquially known as a sheep. The sheep incorporated this feedback in to her paper. After three iterations of shepherding the paper was discussed at the conference in a writer's workshop. The workshop group gave comments, criticism and praise. After the conference the authors updated their papers according to the workshop feedback.

This process of giving feedback was made possible by having a community of trust. Mutual trust was built by playing non-competitive games and by having social activities. VikingPLoP 2013 focused on patterns and their usage in various fields of expertise. These fields included a wide range of topics from educational patterns to safety patterns and embedded system's software architecture patterns. Bringing people together from various fields of expertise stimulates creativity and new ideas might emerge. These innovations are reflected in the papers in these proceedings. VikingPLoP 2013 was especially a conference for newcomers and over half of the participants were first time PLoP participants.

These proceedings contain 9 papers. In addition, a book reading workshop was arranged with Bob Hanmer who presented his new title Pattern-Oriented Software Architecture for Dummies and discussed it with the participants using video conferencing tools.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Pervasive Computing, Research area: Software engineering
Contributors: Eloranta, V. (ed.), Koskinen, J., Leppänen, M. K.
Number of pages: 125
Publication date: 2013

Publication information

Publisher: Tampere University of Technology. Department of Pervasive Computing
ISBN (Print): 978-952-15-3166-8
ISBN (Electronic): 978-952-15-3167-5
Original language: English

Publication series

Name: Tampere University of Technology. Department of Pervasive Computing. Report
Publisher: Tampere University of Technology, Department of Pervasive Computing
Volume: 2
ISSN (Print): 2323-9174

Bibliographical note

Versio ok 14.12.2015

Research output: Book/ReportCommissioned reportProfessional

Proceedings of VikingPLoP 2012 Conference

The papers in this proceedings are updated versions of the papers workshopped in the conference. Participants submitted their papers for shepherding process. In shepherding process, experienced pattern writer gave ideas and feedback for the author, colloquially known as a sheep. The sheep incorporated this feedback in to her paper. After three iterations of shepherding the paper was discussed at the conference in writer's workshop. Workshop group gave comments, criticism and praise. After the conference sheep updated their papers according to the workshop feedback. This process of giving feedback was made possible by having community of trust. Mutual trust was built by playing non-competitive games and by having social activities.

VikingPLoP 2012 focused on patterns and their usage in various fields of expertise. These fields included a wide range of topics from language teaching to embedded system's software architecture. Bringing people together from various fields of expertise, stimulates creativity and new ideas might emerge. These innovations are reflected in the papers in these proceedings. VikingPLoP 2012 was especially a conference for newcomers and over half of the participants were first time PLoP participants.

These proceedings contain 10 papers and description of one focus group. In addition, a shepherding workshop was arranged and updated version of the demo pattern used in this workshop is also presented in the proceedings. The conference had two writer's workshop groups. Papers are organized as follows: in the first part of the proceedings patterns for embedded systems are presented and the second part contains general software related patterns. Finally in the third part, interdisciplinary patterns are included.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Pervasive Computing, Research area: Software engineering
Contributors: Eloranta, V. (ed.), Koskinen, J. (ed.), Leppänen, M. (ed.)
Number of pages: 142
Publication date: 2012

Publication information

Publisher: Tampere University of Technology. Department of Software Systems
ISBN (Print): 978-952-15-2943-6
ISBN (Electronic): 978-952-15-2944-3
Original language: English

Publication series

Name: Tampere University of Technology. Department of Software Systems. Report
Publisher: Tampere University of Technology
Volume: 22
ISSN (Print): 1797-836X

Bibliographical note

Versio ok 14.12.2015

Research output: Book/ReportCommissioned reportProfessional

Generalized hyperbolic harmonic functions in the plane

We consider solutions of the equation yΔh (x,y)-k ah/ay=0 in the plane. These functions already have been investigated by Weinstein around 1950 in connection of generalized axially symmetric potential theory. We have found several results concerning these type of functions, called k-hyperbolic harmonic functions, in higher dimensions. In this paper, we show in the plane case that it is possible to compute the explicit fundamental solutions in terms of the hyperbolic metric. These results may be used to find fundamental solutions in all even dimensional spaces. The key tools are the transformation properties of hyperbolic metric of the Poincaré upper half space model.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mathematics, Research group: MAT Clifford analysis
Contributors: Eriksson, S., Orelma, H., Vuojamo, V.
Publication date: 10 Mar 2015

Host publication information

Title of host publication: Proceedings of the International Conference on Numerical Analysis and Applied Mathematics 2014 (ICNAAM-2014)
Volume: 1648
Publisher: American Institute of Physics Inc.
Article number: 440007
ISBN (Print): 9780735412873
ASJC Scopus subject areas: Physics and Astronomy(all)
Keywords: axially symmetric, fundamental solution, Hyperbolic, Laplace-Beltrami
Source: Scopus
Source ID: 84939648578

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

Tampereen matemaattisten aineiden aineenopettajakoulutus

We present how the education of subject teachers is organized in mathematics, science and computer science in Tampere. It is based on the idea that both engineering students and students from mathematics and science may choose to become a subject teacher. Students are accepted either to the master’s degree program in Science and Engineering of Tampere University of Technology or the master’s program of Mathematics and Statistics of University of Tampere. Students from different universities are giving opportunities to learn from each other. They study physics and chemistry in Tampere University of Technology and do pedagogical studies in University of Tampere. Both universities have also developed special motivating courses based on the didactical research to their students. In mathematics, there is a joined course for the second or third year students motivating towards teaching carrier. In both universities there are possibilities to do the master or bachelor thesis in didactics of mathematics or science. Both universities have an important role in education of subject teachers in Finland. Tampere University of Technology is providing opportunities during studies to cooperate between schools and industry. It gives ideas how science and mathematics are applied in the modern society. University of Tampere also trains primary school teachers with specialization in mathematics.

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Mathematics, Research group: MAT Clifford analysis, Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry
Contributors: Eriksson, S., Haukkanen, P., Hukka, T. I., Lemmetyinen, H.
Number of pages: 8
Pages: 800-807
Publication date: 11 Mar 2015
Peer-reviewed: Unknown

Publication information

Journal: Lumat
Volume: 3
Issue number:  6
ISSN (Print): 2323-7112
Original language: Finnish

Bibliographical note

ORG=mat,0.7
ORG=keb,0.3

Research output: Contribution to journalArticleProfessional

Visual Data Mining in Software Repositories: A Survey

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing
Contributors: Eteläaho, A., Soini, J., Jaakkola, H., Mattila, A.
Pages: 367-385
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

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

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

Thermomechanical properties of overmold epoxies in MEMS packaging

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Electrical Engineering, Research area: Reliability
Contributors: Fard Sanei, M. A., Kiilunen, J., Pippola, J., Lahokallio, S., Frisk, L.
Number of pages: 5
Pages: 175-179
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the IMAPS Nordic Annual Conference , June 8-9, 2015, Helsingør, Denmark
Publisher: IMAPS Nordic
ISBN (Print): 9781510808133

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

The Effects of Initial Moisture on Damp Problems of a Timber Framed Wall Construction - a Numerical Approach

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: University of Oulu
Contributors: Fedorik, F., Malaska, M.
Pages: 18-23
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the XII Finnish Mechanics Days : Finnish mechanics days
Place of publication: Espoo, Finland
Publisher: Finnish Association for Structural Mechanics
Editors: Kouhia, R., Mäkinen, J., Pajunen, S., Saksala, T.
ISBN (Print): 978-952-93-5608-9 ISBN-E 978-952-93-5609-6

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

High power picosecond MOPA with anisotropic ytterbium-doped tapered double-clad fiber

Generation of ultrashort pulses with high average power and moderately high pulse energy generally requires a mode-locked laser followed by several fiber amplifiers in a master-oscillator power-amplifier configuration. Recently, gain-switched diode lasers have emerged as a viable replacement to mode-locked oscillators as sources of sub-100 ps pulses in these systems, but the low output power available from the diodes necessitates the use of multiple costly amplifier stages. Here, we demonstrate the generation of 1.7 mu J pulses at 1030 nm, and 11.7 mu J pulses at 1064 nm from a gain-switched diode seeded compact MOPA with only two amplification stages. The final stage is a tapered fiber amplifier, whose geometry efficiently suppresses amplified spontaneous emission and allows reaching a gain of similar to 40 dB. This research work is still in progress, and further increase in pulse energy should be possible by optimizing the setup.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Research group: Nanophotonics, Ampliconyx Ltd, ITMO Univ, ITMO University, Dept Photon & Opt Informat Technol, Kotelnikov Inst Radio Engn & Elect, Kotelnikov Institute of Radioengineering & Electronics, Tampere Univ Technol, Tampere University of Technology, Peter Great St Petersburg State Polytech Univ, Peter the Great St.Petersburg Polytechnic University
Contributors: Fedotov, A., Noronen, T., Rissanen, J., Gumenyuk, R., Petrov, A., Chamorovskii, Y., Golant, K., Odnoblyudov, M., Filippov, V.
Number of pages: 7
Publication date: 2018

Host publication information

Title of host publication: Proceedings of SPIE : Fiber Lasers and Glass Photonics: Materials through Applications
Volume: 10683
Publisher: SPIE-INT SOC OPTICAL ENGINEERING
Editors: Taccheo, S., Mackenzie, J., Ferrari, M.
ISBN (Print): 9781510618923
ISBN (Electronic): 9781510618930

Publication series

Name: Proceedings of SPIE
Publisher: SPIE-INT SOC OPTICAL ENGINEERING
Volume: 10683
ISSN (Print): 0277-786X

Bibliographical note

EXT="Noronen, Teppo"
EXT="Filippov, Valery"

Source: WOS
Source ID: 000450857500033

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

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

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

On Moderate Inversion/Saturation Regions As Approximations to "Reconciliation" Model

The paper proposes analytical definitions of moderate inversion and moderate saturation. These definitions are introduced considering two different series expansions for the function ln2(x). The expansions are “matched”: the upper limit for convergence of the first series and the lower limit for convergence of the second series define the border and transition from weak to moderate inversion/saturation. The moderate inversion/saturation corresponds to approximation of the function ln2(x) by a modified sum of two first terms of the second series. Then, the condition of inversion/saturation is defined by dominance of one term with respect to another. The condition of moderate inversion/saturation is a necessary step in transition from weak to strong inversion/saturation. The introduced definitions correspond to MOS transistor operation physics and eliminate discontinuity in this transition.

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
Contributors: Filanovsky, I., Järvenhaara, J., Tchamov, N.
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
Publisher: IEEE
ISBN (Electronic): 978-1-4673-8721-7

Bibliographical note

JUFOID=73287

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

Maximally Flat Property and Bandwidth Enhancing by Transfer Function Zeroes IEEE-NewCAS France

The paper describes an extension, at the approximation level, of shunt-peaking technique to increase the filter/amplifier bandwidth. The frequency dependent square modulus of transfer function is multiplied by a polynomial of squared frequency. Using a standard procedure of restoration one finds the new transfer function which is the result of multiplication of initial transfer function by the zeros defined by this polynomial of squared frequency. This new transfer function is characterized by a faster step-transient response of smaller delay and lower overshoot in comparison with initial function which did not include the zeros. An example of sixth order Butterworth filter is considered to demonstrate the modifications of step-transient response depending on the number of zeros. The procedure can also result in pole-zero cancellation simplifying the transfer function for given step-transient response.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electronics and Communications Engineering
Contributors: Filanovsky, I., Tchamov, N.
Publication date: 25 Jun 2017

Host publication information

Title of host publication: 2017 15th IEEE International New Circuits and Systems Conference (NEWCAS)
Publisher: IEEE
ISBN (Electronic): 978-1-5090-4991-2

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

Impact of Axial Profile of the Gain Medium on the Mode Instability in Lasers: Regular Versus Tapered Fibers

The presented paper describes the new concept for suppression of mode instability in high power fiber lasers and amplifiers based on tapered (i.e. axially non-regular) double-clad few-mode gain architecture.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Ultrafast and intense lasers, Institute of Radio Engineering and Electronics, Russian Academy of Sciences (IRE RAS), Russian Acad Sci, Russian Academy of Sciences, Kotelnikov Inst Radio Engn & Elect
Contributors: Filippov, V., Ustimchik, V., Chamorovskiy, Y., Golant, K., Vorotynskii, A., Okhotnikov, O.
Publication date: 24 Jun 2015

Host publication information

Title of host publication: The European Conference on Lasers and Electro-Optics 2015
Publisher: OSA
Article number: CJ-10.5
ISBN (Electronic): 978-1-4673-7475-0

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

Optical amplifiers and lasers based on tapered fiber geometry for power and energy scaling with low signal distortion

We report theoretical and experimental study of tapered double-clad fibers (T-DCF) to be implemented as a gain media in a fiber lasers and amplifiers. We have considered most important properties and features of T-DCF. Various amplifiers and lasers using ytterbium T-DCF are demonstrated.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Ultrafast and intense lasers, Institute of Radio Engineering and Electronics, Russian Academy of Sciences (IRE RAS)
Contributors: Filippov, V., Chamorovskii, Y. K., Golant, K. M., Vorotynskii, A., Okhotnikov, O. G.
Number of pages: 11
Publication date: Feb 2016

Host publication information

Title of host publication: Proceedings of SPIE : Fiber Lasers XIII: Technology, Systems, and Applications
Volume: 9728
Publisher: SPIE
Editor: Ballato, J.
Article number: 97280V-1

Publication series

Name:  SPIE conference proceedings
Publisher: SPIE
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X

Bibliographical note

JUFOID=71479

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

Picosecond MOPA with ytterbium doped tapered double clad fiber

The powerful picosecond master oscillator - power amplifier (MOPA) with double clad ytterbium doped tapered fiber as a buster amplifier has been demonstrated in the presented paper. The developed MOPA has 60ps pulses with 0.3mJ pulse energy and 5MW peak power.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Ultrafast and intense lasers, Photonics, Research group: Nanophotonics, Ampliconyx Ltd, Institute of Radio Engineering and Electronics of the Russian Academy of Sciences
Contributors: Filippov, V., Vorotynskii, A., Noronen, T., Gumenyuk, R., Chamorovskii, Y., Golant, K.
Number of pages: 6
Publication date: 2017

Host publication information

Title of host publication: Fiber Lasers XIV : Technology and Systems
Volume: 10083
Publisher: SPIE
Article number: 100831H
ISBN (Electronic): 9781510606074

Publication series

Name: Proceedings of SPIE
Publisher: SPIE
No.: 10083
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: Fiber laser, Picosecond laser, Ultrafast laser
Source: Scopus
Source ID: 85019465842

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

Optical fiber amplifier with spectral compression elements for high-power laser pulse generation

We report main features of spectral compression of parabolic pulses in nonlinear optical fibers. It is shown that the variational analysis correctly describes evolution of pulse parameters during spectral compression. The model of cascade amplifier system employing spectral compression is developed to achieve superior spectral densities. The proposed configuration is promising as optical pulse preamplifier for operation in the high-energy pulse laser systems.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, University de Mons, Ulyanovsk State University, Optoelectronic Research Center
Contributors: Fotiadi, A. A., Korobko, D. A., Okhotnikov, O. G., Zolotovskii, I. O.
Publication date: 2016

Host publication information

Title of host publication: Nonlinear Optics and its Applications IV
Volume: 9894
Publisher: SPIE
Article number: 989411
ISBN (Electronic): 9781510601390

Publication series

Name: Proceedings of SPIE
Volume: 9894
ISSN (Print): 0277-786X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Electrical and Electronic Engineering, Applied Mathematics
Keywords: Fiber optics amplifiers, high-power laser pulses, nonlinear spectral compression, phase self-modulation
Source: Scopus
Source ID: 84985911601

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

Suomen keraaminen seura - Keramiska sällskapet i Finland

An Article about the history and present state of the Finnish ceramic society

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Materials Science, Research group: Ceramic materials
Contributors: Frankberg, E. J.
Number of pages: 1
Pages: 58-58
Publication date: Oct 2015
Peer-reviewed: Unknown

Publication information

Journal: Materia
Volume: 5
ISSN (Print): 1459-9694
Original language: Finnish
Keywords: Ceramic, society, Finland

Research output: Contribution to journalArticleProfessional

Simultenious binary hash and features learning for image retrieval

Content-based image retrieval systems have plenty of applications in modern world. The most important one is the image search by query image or by semantic description. Approaches to this problem are employed in personal photo-collection management systems, web-scale image search engines, medical systems, etc. Automatic analysis of large unlabeled image datasets is virtually impossible without satisfactory image-retrieval technique. It's the main reason why this kind of automatic image processing has attracted so much attention during recent years. Despite rather huge progress in the field, semantically meaningful image retrieval still remains a challenging task. The main issue here is the demand to provide reliable results in short amount of time. This paper addresses the problem by novel technique for simultaneous learning of global image features and binary hash codes. Our approach provide mapping of pixel-based image representation to hash-value space simultaneously trying to save as much of semantic image content as possible. We use deep learning methodology to generate image description with properties of similarity preservation and statistical independence. The main advantage of our approach in contrast to existing is ability to fine-tune retrieval procedure for very specific application which allow us to provide better results in comparison to general techniques. Presented in the paper framework for data- dependent image hashing is based on use two different kinds of neural networks: convolutional neural networks for image description and autoencoder for feature to hash space mapping. Experimental results confirmed that our approach has shown promising results in compare to other state-of-the-art methods.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Computational Imaging-CI, Don State Technical University, Univ of Texas at San Antonio
Contributors: Frantc, V. A., Makov, S. V., Voronin, V. V., Marchuk, V. I., Semenishchev, E. A., Egiazarian, K. O., Agaian, S.
Publication date: 2016

Host publication information

Title of host publication: Mobile Multimedia/Image Processing, Security, and Applications 2016
Publisher: SPIE
Article number: 986902
ISBN (Electronic): 9781510601109

Publication series

Name: SPIE Conference Proceedings
Volume: 9869
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: autoencoder, content{based image retrieval, deep convolutional neural network, semantic hashing
Source: Scopus
Source ID: 84991480411

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

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

Improving reliability of replicated message delivery in cellular machine-type communications

In this paper, we introduce a novel approach for cellular machine-type communications (MTC) based on random access transmissions. It targets a substantial increase in the probability of message delivery at the first transmission attempt. This may be achieved by sending multiple message replicas across a set of transmission opportunities (in time, code, or frequency), which are shared between all the potential MTC devices. For the considered class of access algorithms, we propose the optimal scheme with centralized control that delivers the maximum success probability. This developed approach together with the conventional baseline method (with a single replica) is analyzed in the meta-stable state, and a performance estimate is obtained. Our numerical results - supported by both analysis and simulations - confirm a significant improvement in terms of the probability of immediate message delivery comparing to the conventional transmission, as well as indicate a potential gap with respect to the derived upper bound.

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
Contributors: Galinina, O., Turlikov, A., Andreev, S., Koucheryavy, Y.
Number of pages: 5
Pages: 106-110
Publication date: 5 Dec 2016

Host publication information

Title of host publication: 2016 8th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)
Publisher: IEEE
ISBN (Electronic): 978-1-4673-8818-4
Keywords: Analytical models, Numerical models, Reliability, Sociology, Statistics, Throughput, Upper bound
Source: Bibtex
Source ID: urn:67d25416e4b4bf5522a2df614d30bd19

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

Surrogate modeling for initial rotational stiffness of welded tubular joints

Recently, buildings and structures erected in Russia and abroad have to comply with stringent economic requirements. Buildings should not only be reliable and safe, have a beautiful architectural design, but also meet the criteria of rationality and energy efficiency. In practice, this usually means the need for additional comparative analysis in order to determine the optimal solution to the engineering task. Usually such an analysis is time-consuming and requires huge computational efforts. In this regard, surrogate modeling can be an effective tool for solving such problems. This article provides a brief description of surrogate models and the basic techniques of their construction, describes the construction process of a surrogate model to calculate initial rotational stiffness of welded RHS joints made of high strength steel (HSS).

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Metal and Light-wight structures, Peter the Great St. Petersburg Polytechnic University, Peter Great St Petersburg Polytech Univ
Contributors: Garifullin, M. R., Barabash, A. V., Naumova, E. A., Zhuvak, O. V., Jokinen, T., Heinisuo, M.
Number of pages: 24
Pages: 53-76
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Magazine of Civil Engineering
Volume: 63
Issue number: 3
ISSN (Print): 2071-4726
Ratings: 
  • Scopus rating (2016): CiteScore 0.3 SJR 0.236 SNIP 0.755
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering
Keywords: Finite element analysis, Kriging, Plane bending, Square hollow section, Surrogate modeling

Bibliographical note

EXT="Garifullin, M. R."

Source: Scopus
Source ID: 84994045052

Research output: Contribution to journalArticleScientificpeer-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

Experimental moment resistance of rectangular hollow section T joints

Resistance is the main property of tubular joints. The determination of the joint resistance from the experimental load-deformation curve always represents a challenging task. Currently there are two main methods to find the experimental resistance, which are called plastic and ultimate resistance. However, there is no single opinion on which one should be commonly used. Based on the experimental results, this paper directly compares the two existed approaches. The study is restricted to welded square hollow section T joints under in-plane bending moment. The paper considers only the joints with β < 0.85, i.e. when the behaviour of the joint is governed by chord face failure. The results show that plastic resistance leads to more conservative results than ultimate resistance, providing thus safer results. However, attention should be also paid to the difference between the labour intensity of the presented methods.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Garifullin, M.
Publication date: 5 Dec 2018
Peer-reviewed: Yes

Publication information

Journal: MATEC Web of Conferences
Volume: 245
Article number: 08003
ISSN (Print): 2274-7214
Ratings: 
  • Scopus rating (2018): CiteScore 0.42 SJR 0.169 SNIP 0.548
Original language: English
ASJC Scopus subject areas: Chemistry(all), Materials Science(all), Engineering(all)
Electronic versions: 
Source: Scopus
Source ID: 85058463414

Research output: Contribution to journalConference articleScientificpeer-review

Model-based cosimulation for industrial wireless networks

Wireless communications technology has the potential to provide major benefits in lowering the cost and increasing the efficiency of factory automation (FA) systems. However, design of FA systems that employ wireless networks involves stringent constraints on real-time performance and reliability, and requires the assessment of and experimentation with complex interactions among process control, factory topology construction (layout and connectivity of subsystems, such as machines, rails, etc.), and wireless communication. In this paper, we introduce a novel simulation framework to support such assessment and experimentation in the design of next-generation FA systems. Our simulation framework employs model-based design principles to enhance design reliability, and enable systematic and efficient integration of control, topology, and network modeling aspects. We demonstrate the utility of our framework through a case study that involves topology design and scalability analysis for a large class of FA systems. Our results demonstrate the ability of the proposed framework to provide insights on complex design trade-offs, while the underlying model-based features enhance efficient and reliable system-level integration.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing, University of Maryland, National Institute of Standards and Technology, Department of Electrical and Computer Engineering
Contributors: Geng, J., Li, H., Liu, Y., Liu, Y., Kashef, M., Candell, R., Bhattacharyya, S. S.
Number of pages: 10
Pages: 1-10
Publication date: 3 Jul 2018

Host publication information

Title of host publication: WFCS 2018 - 2018 14th IEEE International Workshop on Factory Communication Systems
Publisher: IEEE
ISBN (Electronic): 9781538610664
ASJC Scopus subject areas: Electrical and Electronic Engineering, Industrial and Manufacturing Engineering

Bibliographical note

jufoid=83653

Source: Scopus
Source ID: 85050017916

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

Multilag Frequency Estimation for High-Order BOC Signals in the Acquisition Stage

In the context of global navigation satellite systems, this paper addresses the problem of refining the Doppler frequency estimation provided in the acquisition stage for highorder binary offset carrier (BOC) signals in post-correlation. The refinement of Doppler frequency must be done because the estimation obtained from the acquisition stage is not usually accurate enough to track the signal in the tracking stage. In this work, we only use the cross-ambiguity function (CAF) created in the acquisition stage to perform the refinement. A least squares estimator has been already applied to mitigate this problem. We propose a new technique, referred to as multilag least squares estimator, which improves the performance of the least squares estimator by exploiting the autocorrelation shape of high-order BOC signals. Moreover, the Cramer-Rao bound and the expected Cramer-Rao bound are derived as benchmark to compare the performance of the least squares and multilag least squares estimators.

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, Universidad Autónoma de Barcelona, Universitat Autonoma de Barcelona, Spain
Contributors: Gomez Casco, D., Lohan, E., Lopez-Salcedo, J. A., Seco-Granados, G.
Publication date: 2017

Host publication information

Title of host publication: 2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)
Publisher: IEEE
ISBN (Electronic): 978-1-5090-3885-5

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

In vivo single-molecule dynamics of transcription of the viral T7 Phi 10 promoter in Escherichia coli

We study the dynamics of transcription initiation of the T7 Phi 10 promoter as a function of temperature, using quantitative polymerase chain reaction (qPCR) and in vivo single-cell, single-ribonucleic acid (RNA) time-lapse microscopy. First, from the mean and squared coefficient of variation of the empirical distribution of intervals between consecutive RNA appearances in individual cells, we find that both the mean rate and noise in RNA production increase with temperature (from 20 °C to 43 °C). Next, the process is shown to be sub-Poissonian in all conditions, suggesting the existence of more than one rate-limiting step and absence of a significant ON-OFF mechanism. Next, from the kinetics of RNA production for varying amounts of T7 RNA polymerases, we find that as temperature increases, the fraction of time that the T7 RNA polymerase spends in open complex formation increases relative to the time to commit to closed complex formation, due to changes in the kinetics of open complex, closed complex, and reversibility of the closed complex formation. We conclude that the initiation kinetics of the T7 Phi 10 promoter changes with temperature due to changes in the kinetics of its rate-limiting steps.

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, CA3, UNINOVA - Centre of Technology and Systems, Faculdade de Ciências e Tecnologia da Universidade Nova, Universidade de Lisboa
Contributors: Goncalves, N. S., Martins, L., Tran, H., Oliveira, S. M., Neeli-Venkata, R., Fonseca, J., Ribeiro, A. S.
Pages: 9-15
Publication date: 26 Jun 2016

Host publication information

Title of host publication: The 8th International Conference on Bioinformatics, Biocomputational Systems and Biotechnologies (BIOTECHNO2016)
Publisher: IARIA
ISBN (Electronic): 978-1-61208-488-6

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

Terrestrial LiDAR and 3D tree Quantitative Structure Model for quantification of aboveground biomass loss from selective logging in a tropical rainforest of Peru

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Mathematics, Research group: MAT Inverse Problems, Wageningen Univ, Wageningen University & Research Center, Wageningen University and the UNESCO-IHE Institute for Water Education, Delft, The Netherlands, 18.10.2013, Center for International Forestry Research
Contributors: Gonzalez de Tanago, J., Bartholomeus, H., Joseph, S., Herold, M., Avitabile, V., Goodman, R., Raumonen, P., Burt, A.
Number of pages: 3
Pages: 119-121
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

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

Service Failure and Interruption Probability Analysis for Licensed Shared Access Regulatory Framework

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
Contributors: Gudkova, I., Samouylov, K., Ostrikova, D., Mokrov, E., Ponomarenko-Timofeev, A., Andreev, S., Koucheryavy, Y.
Number of pages: 9
Pages: 123-131
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

Bibliographical note

INT=elt,"Ponomarenko-Timofeev, Aleksei"

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

Modeling the utilization of a multi-tenant band in 3GPP LTE system with Licensed Shared Access

Fueled by the rapid growth of mobile services, the actual demand for efficient sharing of available but underutilized frequency spectrum puts pressure on the responsible players (ITU, ETSI) to rethink the feasible ways of allocating wireless spectrum. Today, the LSA regulatory framework is considered to be an important enabler for optimized spectrum sharing between the incumbent and the LSA licensee (e.g., mobile network operator). At any point of time, the frequency bands can be utilized by only a single party, and the spectrum owner has priority in its usage at all times. In this paper, we introduce a mathematical and a system model for the multi-tenant band within the 3GPP LTE cellular network. As the main output of this work, the obtained numerical results for one multi-tenant band are produced. Said band is assumed to be intolerant to traffic delay and our results include the blocking probability as well as the mean downlink TX power of the eNodeB.

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
Contributors: Gudkova, I., Markova, E., Masek, P., Andreev, S., Hosek, J., Yarkina, N., Samouylov, K., Koucheryavy, Y.
Number of pages: 5
Pages: 119-123
Publication date: 1 Oct 2016

Host publication information

Title of host publication: 2016 8th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)
Publisher: IEEE
ISBN (Electronic): 978-1-4673-8818-4
Keywords: Bit rate, Markov processes, Mathematical model, Numerical analysis, Probability distribution, Quality of service
Source: Bibtex
Source ID: urn:5604995b3f78fcd357c6ed1ead1d8558

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

Revisiting Social Media Tie Strength in the Era of Data Access Restrictions

The strength of social ties has an impact on how information is transferred and processed in a social network. Many studies have used social media data to evaluate tie strength. However, many of these studies were done at a time when social media data could be accessed legally without using the social media platform API. In the past few years, there have been significant changes in the data access policies of these platforms, which has led to a considerable reduction in the possibilities of using social media data for tie strength evaluation. The paper aims to study the impact of the data access policy changes of major social media platforms on the existing social media based tie strength models. The findings of this study show that the existing social media based tie strength models can no longer be utilized in their current form. Our study suggests that there is either a need to modify the existing social media based tie strength models or to develop new social media based tie strength models that reflect the recent changes in the data access policies.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management, Copenhagen Business School
Contributors: Gupta, J., Kärkkäinen, H., Torro, O., Mukkamala, R. R.
Number of pages: 8
Pages: 187-194
Publication date: 2019

Host publication information

Title of host publication: Proceedings of the 11th International Conference on Knowledge Management and Information Systems (KMIS 2019)
Publisher: SCITEPRESS
ISBN (Electronic): 978-989-758-382-7
Keywords: Data Access Policy, API, Tie Strength, Social Media, Tie Strength Models, Weak Ties, Strong Ties

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

Principles of designing for situation awareness

High level of situation awareness is a key factor in many domains to ensure correct decision making and actions. Situation awareness has been studied extensively in the aviation and military domains but the research also applies to other domains e.g. power grid operations and managing disturbances of electricity supply. Based on the research design principles have been created in order to help system designers to create better user interfaces for systems used in operational activities. These principles have been applied when designing the situation awareness system concept for managing disturbances of electricity supply.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Electrical Engineering, Research area: Power engineering
Contributors: Haapanen, J.
Pages: 29-46
Publication date: 2015

Publication information

Place of publication: Tampere
Publisher: Maanpuolustuskorkeakoulu Sotatekniikan laitos
ISBN (Print): 978-951-25-2720-5
ISBN (Electronic): 978-951-25-2721-2

Publication series

Name: Situational awareness for critical infrastructure protection
Volume: 3
No.: 1

Research output: Working paperProfessional

Improving the Situation Awareness of DSOs in Major Disturbances by Visualizing the State of Mobile Networks

The interdependency of distribution and mobile networks causes issues in the recovery process of major disturbances as the mobile network is necessary for some distribution automation devices and for repair group communication. Mobile networks go down quickly after a power outage complicating the recovery process. In this paper a situation awareness (SA) system demonstration with a visualized state of both distribution and mobile networks is presented. The aim of the system is to improve the recovery times and reduce the outage costs by improving the mobile networks SA of DSOs and other actors during outages.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electrical Engineering, Research area: Power engineering
Contributors: Haapanen, J., Krohns-Välimäki, H., Verho, P.
Publication date: 14 Jun 2016

Host publication information

Title of host publication: CIRED Workshop 2016
ISBN (Electronic): 978-1-78561-202-2

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

Random Value Impulse Noise Removal Based on Most Similar Neighbors

A novel filter based on four most similar neighbors (MSN) is proposed in this paper which considers all the pixels of the sliding window except the central pixel after taking the first order absolute differences from the central pixel. The proposed filter is composed of two steps: noise detection followed by filtering. In noise detection, first order absolute differences are calculated and sorted in ascending order. Clusters of equal sizes are formed based on most similar pixels and then fuzzy rules are applied to detect the noise present in the current pixel. Threshold parameters are set adaptively. In filtering phase, median based fuzzy filter is used to restore the corrupted pixels. Experimental results show that the proposed filter outperforms several state-of-the-art filers for random value impulse noise removal in an image.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, International Islamic University Islamabad
Contributors: Habib, M., Rasheed, S., Hussain, A., Ali, M.
Number of pages: 5
Pages: 329-333
Publication date: 26 Feb 2016

Host publication information

Title of host publication: 2015 13th International Conference on Frontiers of Information Technology (FIT)
Publisher: IEEE
ISBN (Print): 9781467396660
ASJC Scopus subject areas: Health Informatics, Computer Science Applications, Signal Processing
Keywords: fuzzy logic, Image processing, impulse noise, noise removal

Bibliographical note

INT=elt,"Ali, Mubashir"

Source: Scopus
Source ID: 84964689604

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

SimpleTree: An Efficient Open Source Tool to Build Tree Models from TLS Clouds

An open source tool named SimpleTree, capable of modelling highly accurate cylindrical tree models from terrestrial laser scan point clouds, is presented and evaluated. All important functionalities, accessible in the software via buttons and dialogues, are described including the explanation of all necessary input parameters. The method is validated utilizing 101 point clouds of six different tree species, in the main evergreen and coniferous trees. All scanned trees have been destructively harvested to get accurate estimates of above ground biomass with which we assess the accuracy of the SimpleTree-reconstructed cylinder models. The trees were grouped into four data sets and for each one a Concordance Correlation Coefficient of at least 0.92 (0.92, 0.97, 0.92, 0.94) and an total relative error at most ~8 % (2.42%, 3.59%, –4.59%, 8.27%) was achieved in the comparison of the model results to the ground truth data. A global statistical improvement of derived cylinder radii is presented as well as an efficient optimization approach to automatically improve user given input parameters. An additional check of the SimpleTree results is presented via comparison to the results of trees reconstructed using an alternative, published method.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Mathematics, Research group: MAT Inverse Problems, Mathematical modelling with wide societal impact (MathImpact)
Contributors: Hackenberg, J., Spiecker, H., Calders, K., Disney, M., Raumonen, P.
Number of pages: 50
Pages: 4245-4294
Publication date: 23 Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Forests: Open Access Journal
Volume: 6
Issue number: 11
ISSN (Print): 1999-4907
Ratings: 
  • Scopus rating (2015): CiteScore 1.76 SJR 0.633 SNIP 0.761
Original language: English
URLs: 

Research output: Contribution to journalArticleScientificpeer-review

Oppivan organisaation kehittäminen osaavaksi organisaatioksi. Tapaustutkimus suomalaisessa teollisuusyrityksessä

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Information Management and Logistics
Contributors: Hagman, S.
Number of pages: 209
Publication date: 22 May 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3516-1
ISBN (Electronic): 978-952-15-3521-5
Original language: Finnish

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1296
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio 16.12.2015

Research output: Book/ReportDoctoral thesisMonograph

Modeling of Age-Dependent Failure Tendency from Incomplete Data

This paper addresses modeling of age-dependent failure rates from incomplete data that includes interval-censored failure ages. Two estimators for cumulative failure rates are presented: a simple non-parametric estimator and a maximum-likelihood method based on the gamma distribution and the non-homogeneous Poisson process. The maximum-likelihood fit of familiar parametric models (e.g., the power law) to the available field data from an aircraft component was far from satisfactory, so a special three-parameter model function had to be worked out. The maximum-likelihood estimate obtained is then used for repeated random generation of different data sets akin to the field data. This way the effect of data set size, censoring rate, and randomness on the non-parametric estimate can be analyzed to get practical appraisals.

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, Research group: Käyttövarmuuden suunnittelu ja kunnossapito
Contributors: Hagmark, P., Laitinen, J.
Number of pages: 11
Pages: 449-459
Publication date: 2014

Host publication information

Title of host publication: Engineering Asset Management 2011 : Proceedings of the Sixth World Congress on Engineering Asset Management
Place of publication: London
Publisher: Springer-Verlag London Limited
Editors: Lee, J., Ni, J., Sarangapani, J., Mathew, J.
ISBN (Print): 978-1-4471-4993-4

Publication series

Name: Lecture Notes in Mechanical Engineering
ISSN (Print): 2195-4356
Source: Bibtex
Source ID: urn:d7b891dd2fe21c5e9c101c432e092e18

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

Normalization of deviance in the construction industry, a managerial perspective

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 Project and Service Business (CROPS), London South Bank University (LSBU) and CIB, NTNU Norwegian University of Science and Technology
Contributors: Hajikazemi, S., Ahola, T., Aaltonen, K., Aarseth, W., Andersen, B.
Publication date: Jun 2019

Host publication information

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

Publication series

Name: European academy of management annual conference
ISSN (Electronic): 2466-7498

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

Site-controlled InAs Quantum Dots for Plasmonics

We present site-controlled epitaxy of InAs quantum dots (QD) for plasmonics and report QD-plasmon coupling in a hybrid structure consisting of site-controlled InAs/GaAs QD chains in the proximity of an Ag film.

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: Laboratory for Future Electronics, Department of Physics, Research group: Nanophotonics
Contributors: Hakkarainen, T., Tommila, J., Schramm, A., Simonen, J., Niemi, T., Strelow, C., Kipp, T., Kontio, J., Guina, M.
Publication date: 2016

Host publication information

Title of host publication: Conference on Lasers and Electro-Optics 2016 : QELS_Fundamental Science
Publisher: OSA - The Optical Society
Article number: FM1B.3
ISBN (Electronic): 978-1-943580-11-8
ASJC Scopus subject areas: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Keywords: (250.5403) Plasmonics, (160.4236) Nanomaterials, (160.6000) Semiconductor materials

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

Photo-acoustic Spectroscopy of Resonant Absorption in III-V Semiconductor Nanowires

We show that photo-acoustic spectroscopy allows determination of the nanowire absorbance properties including resonant peak positions and peak broadening due to collective ensemble properties. Furthermore, we demonstrate chiral optical response in asymmetrically Au-coated nanowires.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Research group: ORC
Contributors: Hakkarainen, T., Leahu, G., Petronijevic, E., Belardini, A., Centini, M., Li Voti, R., Koivusalo, E., Rizzo Piton, M., Guina, M., Sibilia, C.
Publication date: 2017

Host publication information

Title of host publication: CLEO: Applications and Technology 2017 : San Jose, California United States 14–19 May 2017
Publisher: The Optical Society; OSA
Article number: JTh2A.48
ISBN (Electronic): 978-1-943580-27-9

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

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

Environment Interpretation for Business Continuity in a Project Supplier’s Networks – Critical Factors in International Industrial Upgrades

Project suppliers operate in temporary networks of stakeholders with limited visibility outside of the project’s dyadic relationships. Environment interpretation can reveal opportunities but also fatal risks in complex networks. Therefore, a wider view is needed for the project supplier to develop their business continuity in networks.

Environment interpretation and business continuity of project suppliers have been given limited attention in project business and industrial networks literature, especially from business opportunity and risk recognition perspectives. This research pursues an increased understanding and introduces the concept and process of network picture alignment in a temporary project’s business as a possible tool for environment interpretation and a source of business continuity in networks. The goal is to construct a framework for a project supplier’s network picture alignment in a value system. A qualitative, constructivist research design was selected to study a real life problem, and to advance the scientific knowledge in management both in international project business and in industrial marketing in networks.

The market research collects and analyses data to comprehend the significance of a business environment change in the paper industry and its influence on the paper machinery business. Thereafter, as a special case, six similar paper machinery upgrade projects from Finland to Italy are empirically studied to perceive critical factors in temporary projects. The critical factors are deductively established for the development of network picture alignment framework. The developed framework on network picture alignment is evaluated with three industrial change cases as post mortem analysis.

The market research revealed that the competitive situation among three dominant paper machinery project suppliers changed significantly between 2008 and 2012. The Austrian Andritz suffered the most from the economic downturn but they were capable of interpreting the business environment and rapidly reached the two market dominators, the Finnish Metso and the German Voith. Andritz concentrated successfully on uncertain upgrade projects and managed to change the situation in competition.

The empirical contribution was the map of the critical factors and steps to construct the framework of market-driven network picture alignment. The theoretical contribution is that a project supplier needs to critically interpret the environment and broaden their temporary projects’ and project business boundaries outside of the focal project networks for business opportunity recognition and risk reveal. Moreover, a supplier or other focal stakeholder in the value system is suggested to align its situated network picture to other stakeholders’ network pictures in dyadic, triadic and extended networked collaboration and relationships for continuous cooperation, with the constructed market-driven network picture alignment framework. In addition, network pictures are conceptually suggested to become flexible and dynamic, with market-driven mindsets and consecutive successful network picture alignments in the context specific value system.

The business opportunity identification for a machinery upgrade requires tight interactive technical collaboration in a customer’s production process. Continuous cooperation can be reached with harmonious relationships and repetitive network picture alignments between stakeholders. However, cultural distance matters in the reach of business objectives. A project supplier’s organization and persons have to follow a market-driven mindset in context specific network picture alignment. A market-driven mindset attached to collectivistic, and entrepreneurial activities advances the business performance. Thus, a supplier can create their own path for continuous business utilizing market-driven network picture alignment framework as the core of the strategic market management in networks.

Forthcoming research should study the question “why” salience is caused in global level environment interpretation in addition to “what” and “who” cause stakeholder salience. Moreover, network picture alignments should be studied in other social interaction processes, for example in business acquisition integrations. When the situated network picture version is the focus of this research, the representationalist and mentalist alignment versions would need further understanding. As the dissertation reveals network picture dynamization and consecutive network picture alignments as features of evolving project businesses, they are suggested as topics of future research.

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Industrial Management
Contributors: Halinoja, M.
Number of pages: 237
Publication date: 4 Sep 2015

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3557-4
ISBN (Electronic): 978-952-15-3566-6
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1313
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 14.12.2015

Research output: Book/ReportDoctoral thesisMonograph

Value Creation in Private Equity: A Case Study of Outperforming Buyouts in the Nordic Countries

A number of studies have reported that the returns from acquisitions made by private equity (PE) firms have exceeded those of the public markets, e.g. the S&P 500. The outperformance displayed in the buyouts made by private equity firms is perplexing, particularly given the underperformance and high failure rate typically reported in studies of traditional corporate mergers and acquisitions (M&A). This dissertation strives to shed a light on the dichotomy by examining the activities in a select sample of buyouts during the pre-buyout phase, holding period, and the exit transaction. The study makes a number of significant contributions. It contributes to the theoretical and conceptual understanding of private equity buyouts by materially extending previous models of value creation into a novel taxonomy and cohesive structure. It contributes empirically by filling an important research gap concerning the subset of buyouts that exhibited exceptional outperformance compared to peer firms in PE portfolios. The inductive multiple–case study approach in combination with access to proprietary interview data permitted an in-depth analysis of the factors conducive to buyout value creation. The analysis indicates the key factors resulting in the outperformance were timing the entry and exit transaction to the business and industry cycles, identifying and executing the apposite business strategy, utilizing alternative modes of debt financing, discerning the pre-buyout target firm characteristics, implementing a pervasive array of operational improvements, and lastly, achieving high-levels of employee motivation and commitment across the organization.

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Industrial Management
Contributors: Hannus, S.
Number of pages: 180
Publication date: 24 Oct 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3589-5
ISBN (Electronic): 978-952-15-3614-4
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1328
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 14.12.2015

Research output: Book/ReportDoctoral thesisMonograph

On Polyglot Programming in the Web

Different programming languages have been designed to solve problems efficiently in different domains. The goal of polyglot programming, a technique where several languages are used in the creation of a single application, is to combine and utilize the best solutions from different programming languages and paradigms in a seamless fashion. In this paper, the authors examine polyglot programming in the context of web applications, where it has been commonly used to create compelling applications, but where there is still considerable potential to improve development in various ways.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Pervasive Computing, Research area: Software engineering, Ada Drive
Contributors: Harmanen, J., Mikkonen, T.
Number of pages: 18
Pages: 102-119
Publication date: 2016

Host publication information

Title of host publication: Modern Software Engineering Methodologies for Mobile and Cloud Environments
Publisher: IGI Global
ISBN (Print): 9781466699168
ISBN (Electronic): 9781466699175

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

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

Lean-tuotanto ja sen johtaminen: onnistuminen, haasteet ja soveltuminen Suomen yrityksiin ja muihin organisaatioihin

The so-called Lean development methods are today commonly used in many types of workplaces. Many good success stories are reported but Lean-projects and the tools used in them do not always bring the desired results. The central idea in Lean thinking is the distinction of two types of efficiencies; resource efficiency and flow efficiency. Lean production systems aim at high flow efficiency but achieving it requires high resource flexibility and understanding of the uncertainty inherent in the production system. Lean-management is often related to certain methods and techniques, but they do not alone bring improvement without a holistic managerial philosophy that supports improvement on several levels of the organization’s activities. Successful application of Lean management implies strategic choices and long-term commitment to organizational learning and development. The popularity of Lean management in Finnish organizations indicates that there is generally room for improvement in the organizations’ operational activities. Lean management provides a structured model for development. It can bring successful results if implemented holistically and with a long-term commitment.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Heikkilä, J., Martinsuo, M.
Number of pages: 7
Pages: 18-24
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Työpoliittinen aikakauskirja
Issue number: 3
ISSN (Print): 0787-510X
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-review

Long-term effects of purchasing: fact or fiction?

Long-term approach to evaluate the performance of purchasing over its entire life-cycle ischallenging. It is especially hard to determine the relationship between the early purchasing actions and the long-term consequences of acquiring complex product-service combinations with a long life-cycle. We carried out an interview study with four companies to explore how the long-term purchasing perspective is perceived in different business environments. The results indicate that practices to create long-term consequences of purchasing activities take many different forms. The study highlights practices of the purchasing function when aiming at creating long-term effects of purchasing.

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: Heikkilä, J., Jääskeläinen, A., Thitz, O.
Publication date: 2016

Host publication information

Title of host publication: Proceedings of 25th IPSERA 2016 conference, 20-23.3.2016, Dortmund, Germany.
Publisher: International Purchasing and Supply Education and Research Association IPSERA

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

Power and wavelength scaling using semiconductor disk laser - bismuth fiber MOPA systems

We present a master oscillator power amplifier (MOPA) system that comprises a mode-locked semiconductor disk laser (SDL) emitting at 1.33 mu m and a bismuth-doped fiber amplifier. The mode-locked SDL was fabricated by wafer bonding an InP-based gain section with a GaAs-based distributed Bragg reflector (DBR) using (3-Mercaptopropyl)trimethoxysilane. The bismuth-doped fiber amplifier was pumped with a continuous wave SDL emitting at 1.18 mu m. The MOPA system produced pulses at a repetition rate of 827 MHz with a pulse energy of 0.62 nJ, which corresponds to an average output power of more than 0.5 W.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Frontier Photonics, Optoelectronics Research Centre, Research group: Ultrafast and intense lasers, Research group: Semiconductor Technology and Applications, Ulyanovsk State University, Fiber Optics Research Center, Russian Academy of Sciences
Contributors: Heikkinen, J., Gumenyuk, R., Rantamäki, A., Lyytikäinen, J., Leinonen, T., Zolotovskii, I., Melkumov, M., Dianov, E. M., Okhotnikov, O. G.
Number of pages: 7
Publication date: 2015

Host publication information

Title of host publication: Vertical External Cavity Surface Emitting Lasers (VECSELs) V
Place of publication: BELLINGHAM
Publisher: SPIE
Editor: Guina, M.
Article number: 93490E
ISBN (Print): 9781628414394

Publication series

Name: Proceedings of SPIE
Publisher: SPIE-INT SOC OPTICAL ENGINEERING
Volume: 9349
ISSN (Print): 0277-786X
ASJC Scopus subject areas: Applied Mathematics, Computer Science Applications, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Keywords: Semiconductor disk laser (SDL), vertical-external-cavity surface-emitting laser (VECSEL), modelocking, wafer bonding, bismuth-doped fiber, master oscillator power amplifier (MOPA), SUPERCONTINUUM GENERATION, OUTPUT POWER, PICOSECOND, VECSEL, PULSES, GHZ
Source: WOS
Source ID: 000353134900011

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

Surrogate model for rotational stiffness of welded tubular Y‐joints

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, Poznan University of Technology, Peter Great St Petersburg Polytech Univ
Contributors: Heinisuo, M., Mela, K., Tiainen, T., Jokinen, T., Baczkiewicz, J., Garifullin, M.
Number of pages: 22
Pages: 18-39
Publication date: 2015

Host publication information

Title of host publication: METNET Tenth International Seminar in Budapest 13.-14.10.2015
ISBN (Print): 978-951-784-762-9
ISBN (Electronic): 978-951-784-763-6

Publication series

Name: HAMKin julkaisuja
No.: 15
ISSN (Print): 1795-4231
ISSN (Electronic): 1795-424X

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

The 13th Nordic Steel Construction Conference (NSCC.2015)

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Civil Engineering, Research group: Structural Mechanics, Research group: Metal and Light-wight structures
Contributors: Heinisuo, M. (ed.), Mäkinen, J. (ed.)
Publication date: 23 Sep 2015

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3578-9
ISBN (Electronic): 978-952-15-3579-6
Original language: English

Research output: Book/ReportAnthologyScientificpeer-review

Kattavasti rivitaloista

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: School of Architecture, Research group: ASUTUT
Contributors: Helamaa, A.
Number of pages: 2
Pages: 80-81
Publication date: 2015
Peer-reviewed: Unknown

Publication information

Journal: Arkkitehti
Issue number: 3
ISSN (Print): 0783-3660
Original language: Finnish

Research output: Contribution to journalBook/Film/Article reviewProfessional

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

Enablers and Restraints of Knowledge Work – Does profession make a difference?

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics, Research group: Novi, University of Tampere
Contributors: Helander, N., Okkonen, J., Vuori, V., Paavilainen, N., Kujala, J.
Number of pages: 13
Pages: 40-52
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

Teoriaa ja kokemuksia arvioinnista MOOCien aikakaudella

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Information Management and Logistics, Research group: Novi, Tampere University of Applied Sciences
Contributors: Helander, N., Myllylä, M.
Number of pages: 7
Pages: 70-77
Publication date: 11 Jul 2016
Peer-reviewed: Yes

Publication information

Journal: TAMPEREEN AMMATTIKORKEAKOULUN JULKAISUJA. SARJA B, RAPORTTEJA
ISSN (Print): 1456-002X
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-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

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

The development curve of knowledge management practices: a ten year perspective from top50 Finnish enterprises

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Information Management and Logistics, Research group: Novi, Department of Information Management and Logistics
Contributors: Helander, N., Väyrynen, H., Zhao, X., Kukko, M.
Publication date: 31 Jan 2015

Host publication information

Title of host publication: 15th Eurasia business and economics society conference : Lisbon, Portugal, January 8-10, 2015
Publisher: Springer
ISBN (Electronic): 978-3-319-27573-4

Bibliographical note

INT=tlo,"Zhao, Xuepin"

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

Pystytäänkö haitallisia ilmanvaihtovikoja havaitsemaan ja poistamaan

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Real estate development, VTT
Contributors: Heljo, J., Kauppinen, T.
Number of pages: 6
Pages: 325-330
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

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

Energiatehokkuus on entistä enemmän sähkötehon hallintaa

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Real estate development, Research group: Capacity Development of Water and Environmental Services CADWES, Tampere University of Applied Science
Contributors: Heljo, J., Sorri, J., Harsia, P.
Number of pages: 6
Pages: 281-286
Publication date: 2017

Host publication information

Title of host publication: Rakennusfysiikka 2017: Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut : 24.-26.10.2017, Tampere
Volume: 1
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.

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

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

Koko Julkisivua peittävän lasijulkisivun vaikutus Etelä-Ruotsissa sijaitsevan rakennuksen energiatehokkuuteen

Article discuss the effect of the added façade glazing on the building energy consumption in one case building in Malmö, Sweden

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, Lund University
Contributors: Hilliaho, K., Nordquist, B., Wallentén, P.
Number of pages: 8
Pages: 509-516
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

Publication series

Name: Rakennustekniikan laitos. Rakennetekniikka. Seminaarijulkaisu 4
No.: 4
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Double skin facade, Energy efficiency, New renovation consepts, Innovative HVAC, Earth to air heat exchancer

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

Lasitettujen parvekkeiden ja terassien käyttäytyminen tulipaloissa

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Palotekninen insinööritoimisto Markku Kauriala Oy, Lumon Oy
Contributors: Hilliaho, K., Hietaniemi, J., Visa, P.
Number of pages: 6
Pages: 18-23
Publication date: 24 Aug 2015
Peer-reviewed: Unknown

Publication information

Journal: Palontorjuntatekniikka
Issue number: Erikoisnumero
Original language: Finnish

Research output: Contribution to journalArticleProfessional

Seinäjoen ydinkeskustan olennaiset kehitysvaiheet ja sen 1950 - 70-lukujen rakennusperinnön arvottamisperiaatteita

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: School of Architecture, Research group: Urban Laboratory
Contributors: Hirvonen, T.
Number of pages: 121
Publication date: 2015

Publication information

Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto. Arkkitehtuurin laitos
ISBN (Electronic): 978-952-15-3549-9
Original language: Finnish

Bibliographical note

Versio ok 14.12.2015

Research output: Book/ReportCommissioned reportProfessional

The effect of tungsten carbide particles content in a weld deposit on its abrasion resistance

This paper describes the study of a weld deposit which contains tungsten carbide particles. For testing the process of gas metal arc welding in a protective atmosphere of a mixed gas with two types of cored wires were used. The selected cored electrode of a "F-Durit G" type already contains the tungsten carbide particles. The second used option was a cored electrode of a "Megafil A 864M" type with an increased boron content. For the second variant tungsten carbide particles with a 1-2 mm size were added to the weld pool, and a composite material layer was thus created. For the mentioned test two different levels of welding parameters were selected and the final weld deposit properties, particularly their abrasion resistance, were examined.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science, VSB-Technical University Ostrava, Czech Republic, University of Osijek
Contributors: Hlavatý, I., Kozák, J., Krejci, L., Samardzic, I., Tuominen, J.
Number of pages: 5
Pages: 1345-1349
Publication date: Oct 2017
Peer-reviewed: Yes

Publication information

Journal: Technical Gazette - Technicki vjesnik
Volume: 24
Issue number: 5
ISSN (Print): 1848-6339
Original language: English
Keywords: Hardfacing, Metal matrix composite, Gas metal arc welding, Abrasive wear
Electronic versions: 

Research output: Contribution to journalArticleScientificpeer-review

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

High Temperature Tension HSB Device Based on Direct Electrical Heating

The effects of strain rate and temperature on the mechanical properties of various engineering materials have been extensively studied within the past few decades. However, the high temperature high strain rate tension Hopkinson Split Bar (HSB) testing is still quite challenging to perform due to the need to fix the sample to the stress bars. Mechanical fixing of a sheet material sample is not very convenient and can produce low quality results. Therefore, the sheet samples are typically glued directly to the stress bars. This glue joint, however, loses strength rapidly if the temperature of the glue joint increases above room temperature, which makes the high temperature testing more difficult. In this paper, we present a tension Hopkinson Split Bar device with a high temperature system that allows the sample to be heated while keeping the glue joint at or close to room temperature. The sample is rapidly heated by a powerful low voltage high amperage DC pulse. When testing stainless steels, test temperatures between 400 and 800 °C are reached in less than one second, and even the melting temperature of the material is reached in less than 2 s. The system is fully computer controlled allowing accurate timing and control of the different actions during the test including heating of the sample, pneumatic manipulation of the heating electrodes, releasing of the striker bar, and recording of the test results. The results obtained with the current high temperature system are high quality and the obtained high temperature stress strain curves are essentially oscillation free. © The Society for Experimental Mechanics, Inc. 2015.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Materials Science, Research group: Materials Characterization, Engineering materials science and solutions (EMASS)
Contributors: Hokka, M., Östman, K., Rämö, J., Kuokkala, V. T.
Number of pages: 7
Pages: 227-233
Publication date: 2015

Host publication information

Title of host publication: Dynamic Behavior of Materials, Volume 1 : Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics
Volume: 65
Publisher: Springer
Editors: Song, B., Casem, D., Kimberley, J.
ISBN (Print): 978-3-319-06994-4
ISBN (Electronic): 978-3-319-06995-1

Publication series

Name: Conference Proceedings of the Society for Experimental Mechanics Series
Publisher: Springer
ISSN (Print): 2191-5644
ASJC Scopus subject areas: Engineering(all), Computational Mechanics, Mechanical Engineering
Keywords: High strain rate, High temperature, Hopkinson split bar, Stainless steels, Tension testing

Bibliographical note

siirretään 2015<br/>Contribution: organisation=mol,FACT1=1<br/>Portfolio EDEND: 2015-01-13</br>publication_forum:72540

Source: researchoutputwizard
Source ID: 8

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

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

Transpositions and duals high-order tensors. On theory and applications in mechanics

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.
Number of pages: 6
Pages: 188-193
Publication date: 4 Jun 2015

Host publication information

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

Publication series

Name: Journal of Structural Mechanics
Publisher: Rakenteiden mekaniikan seura r.y.

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

Evolution equations based approach for modeling of fatigue in amorphous glassy polymers. On the investigation of fatigue damage development in polycarbonate

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
Contributors: Holopainen, S.
Number of pages: 13
Pages: 6675-6687
Publication date: 2016

Host publication information

Title of host publication: Proc. of VII European Congress on Computational Methods in Applied Sciences and Engineering , ECCOMAS Congress 2016. : M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris (eds.) . Crete Island, Greece, 5 – 10 June 2016
Editors: Papadrakakis, M., Papadopoulos, V., Stefanou, G., Plevris , V.
ISBN (Print): 978-618-82844-0-1

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

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

On Predicting Video Quality Expectations of Mobile Users

Mobile network operators are currently seeking for simple but accurate methods to predict the levels of satisfaction for their customers using the on-line multimedia applications, such as YouTube. Even though the ultimate user demands are known to be influenced by multiple factors, there is one clear trend - people require an increasingly higher quality of mobile video services. To this end, modeling the corresponding quality of experience (QoE) constitutes a non-trivial task and calls for a careful balance between the key underlying aspects, while maintaining the overall complexity as low as possible. This should in turn deliver the much needed usability of the resulting model across many real-world scenarios, and in this work we develop a novel QoE prediction model based on our extensive user experience investigation of the YouTube service. Our proposed solution allows network operators to estimate the degrees of video quality and thus predict the associated mobile user expectations in their deployments. The design principles behind our methodology, its accuracy evaluation, as well as the obtained numerical results are reported in the course of this paper.

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, Brno University of Technology
Contributors: Hosek, J., Kovac, D., Uhlir, D., Galinina, O., Andreev, S., Koucheryavy, Y., Ries, M.
Number of pages: 6
Pages: 110-115
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

Target tracking via combination of particle filter and optimisation techniques

Particle filters (PFs) have been used for the nonlinear estimation for a number of years. However, they suffer from the impoverishment phenomenon. It is brought by resampling which intends to prevent particle degradation, and therefore becomes the inherent weakness of this technique. To solve the problem of sample impoverishment and to improve the performance of the standard particle filter we propose a modification to this method by adding a sampling mechanism inspired by optimisation techniques, namely, the pattern search, particle swarm optimisation, differential evolution and Nelder-Mead algorithms. In the proposed methods, the true state of the target can be better expressed by the optimised particle set and the number of meaningful particles can be grown significantly. The efficiency of the proposed particle filters is supported by a truck-trailer problem. Simulations show that the hybridised particle filter with Nelder-Mead search is better than other optimisation approaches in terms of particle diversity.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Signal Processing, University of Toledo, Bowling Green State University
Contributors: Hosseini, S. S. S., Jamali, M. M., Astola, J., Gorsevski, P. V.
Number of pages: 18
Pages: 212-229
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: International Journal of Mathematical Modelling and Numerical Optimization
Volume: 7
Issue number: 2
ISSN (Print): 2040-3607
Ratings: 
  • Scopus rating (2016): CiteScore 1.44 SJR 0.351 SNIP 0.935
Original language: English
ASJC Scopus subject areas: Numerical Analysis, Modelling and Simulation, Applied Mathematics
Keywords: Differential evolution, Nelder-Mead, Particle filter, Particle swarm optimisation, Pattern search, PSO, Target tracking
Source: Scopus
Source ID: 84990239582

Research output: Contribution to journalArticleScientificpeer-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

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

The Workplace for Researchers – Enhancing Concentration and Face-to-face Interaction

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Huhtelin, M., Nenonen, S.
Pages: 753-764
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
Publisher: Tampere University of Technology. Department of Civil Engineering
ISBN (Electronic): 978-952-15-3741-7

Bibliographical note

INT=rak,"Huhtelin, Mervi"

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

Resilient Asset Management and Governance Fordeteriorating Water Services Infrastructure

This paper argues that strategic asset management and a sound regulatory regime are required urgently if we want to change the current paradigm of aging and decaying water services infrastructure and expand the coverage of improved water services in the developing economies. In the OECD countries access to safe water supply and sanitation has largely been ensured through substantial investment over many decades. Yet, significant investments will still be required to rehabilitate the existing infrastructures, to bring them into conformity with more stringent environmental and health regulations, and to maintain service quality in the future. In the non-OECD countries the challenges are more daunting. Large parts of their population have no access and many suffer from unsatisfactory services. Nearly one billion people lack access to clean drinking water and 2.6 billion people lack access to improved sanitation services.Lack of sound economic regulatory frameworks and enforcement regimes, and poor asset management practices, in particular underpricing of water services is a common problem throughout the world.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Department of Chemistry and Bioengineering
Contributors: Hukka, J. J., Katko, T. S.
Number of pages: 8
Pages: 112-119
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
Keywords: aging and deteriorating water services infrastructure, investment gap, strategic asset management, regulatory and enforcement framework, sustainability.
Source: RIS
Source ID: urn:B63C341C3AC1323B613E64632E9D1135

Research output: Contribution to journalArticleScientificpeer-review

Integrated urban water management, the green economy and institutional eco-innovations

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Hukka, J. J., Nyanchaga, E. N., Katko, T. S.
Number of pages: 11
Pages: 260-271
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016 : Volume III - Building up business operations and their logic. Shaping materials and technologies
Place of publication: Tampere
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Saari, A., Huovinen, P.
ISBN (Print): 978-952-15-3743-1

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

On Detecting the Shape of an Unknown Object in an Electric Field

The problem discussed in this paper is detecting the shape of an unknown object in a 2-dimensional static electric field. For simplicity, the problem is defined in a partially rectangular domain, where on a part of the boundary the potential and/or its normal derivative are known. On the other part of the boundary the boundary curve is unknown, and this curve is to be determined. The unknown part of the boundary curve describes the shape of the unknown object.
The problem is defined in the complex plane by an analytic function w=f(z) = u(x,y)+iv(x,y) with the potential u as its real part. Then the inverse function is given as f^{-1}(w) = x(u,v)+iy(u,v), where the functions x and y are harmonic in a rectangle with an unknown boundary condition on one boundary. The alternating-field technique is used to solve the unknown boundary condition.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mathematics, Research group: MAT Mathematical and semantic modelling, Research group: MAT Intelligent Information Systems Laboratory
Contributors: Humaloja, J., Hämäläinen, T., Pohjolainen, S.
Publication date: 2016

Host publication information

Title of host publication: Progress in Industrial Mathematics at ECMI 2014
Publisher: Springer International Publishing
Editors: Russo, G., Capasso, V., Nicosia, G., Romano, V.
ISBN (Print): 978-3-319-23412-0
ISBN (Electronic): 978-3-319-23413-7

Publication series

Name: Mathematics in Industry
Publisher: Springer-Verlag
Volume: 22
ISSN (Electronic): 1612-3956
Keywords: free boundary problem, industrial mathematics

Bibliographical note

Embargo avoinna, koska ei vielä julkaistu (Due May 3, 2017)
HO / 2.5.2016

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

Winner-Does-Not-Take-All: Selective Attention and Local Bias in Platform-Based Markets

We examine competition between platforms in platform-based markets with agent-based modeling. In our proposed model, a consumer adopts a platform that offers the most relative utility of competing platforms. More specifically, the utility is derived from the local direct network effects arising from the social network of the consumer and the indirect network effects arising from complementary products of the platform. We portray the consumer as selectively attentive and locally biased. We contrast the proposed model to several alternative models with empirical data from the competition between Sony’s PlayStation 3 and Microsoft’s Xbox 360 and show that the proposed model, where the aforementioned consumer characteristics, and platform pricing, explain the adoption decisions of consumers and thus the division of the market between platforms. We offer important insights on how the dynamics of competition on the macro-level emerge from micro-level interactions between consumers.

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, Lappeenranta University of Technology, Hanken School of Economics
Contributors: Huotari, P., Järvi, K., Kortelainen, S., Huhtamäki, J.
Publication date: Jan 2015

Host publication information

Title of host publication: Academy of Management Proceedings : Meeting Abstract Supplement
Publisher: Academy of Management

Publication series

Name: Academy of Management. Annual Meeting Proceedings
Publisher: Academy of Management
ISSN (Electronic): 2151-6561

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

Theoretical 71-Concept Platform for Advancing Construction-related Business Management

Abstract The aim is to advance business management (BM) in constructionvia the independent literature review. 71 construction-related BM concepts have been published between 1990 and 2013. Focal firms are based in the OECD countries. 34 (48%) concepts are related to construction management (CM), 14 (20%) concepts to industrial management and international marketing, 12 (17%) concepts to project management (PM) and 11 (15%) concepts to corporate real estate. The combined share of 16 Porterian, 16 dynamism-based, 15 organisation-based, and 10 knowledge-based concepts is 81%. The 71-concept platform is neither highly theoretically advanced, nor highly applicable. The propositions are defined for advancement.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Digitalization in the real estate and construction sector
Contributors: Huovinen, P.
Number of pages: 8
Pages: 80-87
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
ASJC Scopus subject areas: Business, Management and Accounting(all)
Keywords: Applied research, business management, conceptualisation, construction, literature review, real estate, school of thought
Source: RIS
Source ID: urn:2259E842B1A87C3870EDBE85F572BB11

Research output: Contribution to journalArticleScientificpeer-review

Leveraging concepts for environmentally sustainable business management in construction - a focused review

The main objective of this paper is to advance applied conceptual knowledge about environmentally sustainable business management (BM) in construction. Environmentally sustainable BM is herein defined to encompass the utilization and development of natural resources in ways which are compatible with the maintenance of these resources, and with the conservation of the natural and built environments, for current and future generations. In principle, concept designers can incorporate environmental sustainability into their BM concepts as a dimension, an element, or an attribute of managing, or as a criterion in decision making. Readily, the 71 construction-related BM concepts have been published between 1990 and 2013. A focused review resulted in the expected findings, i.e., only the 11 (15%) construction-related BM concepts have been designed along the environmental sustainability dimension. Thus, it is posited that high-sustainability BM concepts be designed by coupling environmental sustainability with the three other necessary dimensions, i.e., content-free frames of reference on BM, schools of thought on generic BM, and focal contexts in construction, respectively. In turn, CIB-related researchers may adopt these couplings and engage themselves with cross-disciplinary BM conceptualization programs in collaboration with farsighted business managers in construction.

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: Huovinen, P.
Number of pages: 11
Pages: 286-296
Publication date: 2015

Host publication information

Title of host publication: CIB Proceedings 2015 : Going North for Sustainability: Leveraging Knowledge and Innovation for Sustainable Construction and Development
Place of publication: London, UK
Publisher: IBEA Publications Ltd
Editor: Egbu , C.
ISBN (Print): 978-1-326-47951-0
ASJC Scopus subject areas: Building and Construction
Keywords: business management, concept design, construction, environmental sustainability, research review

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

Relevance of five generic business ideation approaches vis-a-vis contexts embedded within construction markets

In general, ideation encompasses the formation of ideas or mental images of things not present to the senses or simply the creation of new ideas. Business ideation is herein perceived to be the core area within future-oriented business management (BM). The main aim of the paper is to assess and advance the relevance of the five generic approaches to business ideation vis-à-vis
firms targeting contexts embedded within construction markets. A typology differentiates between the fitting, value-creating, profit generating, systemizing, and commercializing approaches. It is argued that each approach is, at minimum, highly relevant in the case of business unit (BU) management targeting preferred client investment and procurement behavior within construction markets. Approach 1 involves BUs aiming at fit between clients and their needs as well as units’ offerings and operations, respectively. Professional clients couple needs
with preferred procurement methods whereas competing BUs are trying to achieve best fit between solutions and client behaviors. This approach calls for research on how to sustain such fit between a BU and clients when changes occur. Approach 2 enables BUs to create value by specifying high-value propositions, producing value to clients, and capturing their fair shares of
produced values. Farsighted clients look for more or novel values for construction investments and, thus, units are collaborating and co-producing values to clients. This approach calls for research on a BU’s value co-production with such clients, value capture, and offerings integration. Approach 3 accommodates BUs that are focusing on generating profits, achieving
high-profit levels, and sustaining them. Pioneering clients pursue complex investment aims that can be met only by radical solutions. This approach calls for research on a BU’s profit-generating mechanisms related to clients with complex investment needs and radical solutions. Approach 4 facilitates BUs to systemize businesses around core ideas. Sectoral clients have large or complex needs and, in turn, units are satisfying them by engineering systems as wholes and delivering them as parts. This approach calls for research on BUs with systems and clients, multi-dimensional investments, and system engineering as wholes and parts. Approach 5 facilitates BUs to couple ideas with commercializing dimensions such as entrepreneurship, innovation, business development, venturing, or spin-offing. Risk-taking clients prefer to enter high-innovation contracts and, thus, units are offering novel solutions and emerging business
cases. This approach calls for research on a BU’s entrepreneurial competencies and risk-taking clients, wicked investment needs, and high-innovation contracts. In the same vein, the suggestions are put forth to CIB-related scholars for directing research on along the BM and ideation dimensions and adopting most relevant approaches. Likewise, management in firms and BUs competing in construction markets are encouraged to assess the business case-sensitive
relevance of each of Approaches 1-5 and try out those with initial high relevance.

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: Huovinen, P.
Number of pages: 12
Pages: 1129-1140
Publication date: 28 May 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016, May 30 - June 3, 2016, Tampere, Finland : Advancing products and services
Volume: V
Place of publication: Tampere
Publisher: Tampere University of Technology. Department of Civil Engineering
Editor: Achour, N.
ISBN (Print): 978-952-15-3745-5
Keywords: Business ideation, business management, construction markets, literature review

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

Suuren lämmöneristämättömän maanvastaisen alapohjan vaikutus rakennuksen energiankulutukseen

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: Huttunen, P., Rantala, J., Vinha, J.
Number of pages: 8
Pages: 335-342
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: 1
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
Editors: Vinha, J., Kivioja, H.
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
Publisher: Tampereen teknillinen yliopisto

Bibliographical note

INT=rak,"Rantala, Juha"

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

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

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

Puu-Hubi: Perinteestä uusiin innovaatioihin

Maailmalla on menossa puurakentamisen buumi, jolle ennakoidaan pitkää ikää ja valoisaa tulevaisuutta. Kehityksen etulinjassa on saksankielinen Keski-Eurooppa, Ruotsi ja Norja. Myös Kanadassa ja Yhdysvalloissa puurakentamisella on pitkät perinteet ja laajat markkinat. Vahvin muutosajuri puun käytön lisäämiselle on ilmastonmuutos. Suomi on mukana kansainvälisissä sopimuksissa, jotka sitovat meidät hiilidioksidipäästöjen runsaaseen pienentämiseen lähitulevaisuudessa. Mutta vaikka ympäristösopimukset asettavat kovia velvoitteita, ne tarjoavat myös uusia taloudellisia mahdollisuuksia.


Seinäjoen Ammattikorkeakoulun ja Tampereen teknillisen yliopiston yhteistyössä käynnistämä Puu-Hubi–projekti pyrki edistämään eteläpohjalaista puurakentamista. Tavoitteena oli puukerrostalon rakentamisessa vaadittava osaaminen ja tuotetarjonta, sekä näiden myötä kasvava liiketoiminta. Tässä kirjassa esitellään teemoja, joita hankkeen kuluessa kohdattiin, ja jotka tuntuivat tuoreilta. Kirjan tekstit eivät ole ”yhdestä puusta”, vaan ne rönsyävät omia uomiaan kohti yhteistä aihettamme, suomalaisen puurakentamisen uutta tulemista.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: School of Architecture, Research group: Urban Laboratory
Contributors: Hynynen, A. (ed.), Panu, A. (ed.), Taanila, T. (ed.)
Number of pages: 107
Publication date: 2015

Publication information

Publisher: Tampereen teknillinen yliopisto. Arkkitehtuurin laitos
ISBN (Print): 978-952-15-3497-3
ISBN (Electronic): 978-952-15-3498-0
Original language: Finnish

Bibliographical note

Versio ok 14.12.2015

Research output: Book/ReportCommissioned reportProfessional

Puurakentamisesta potkua alueiden ja kaupunkien kehittämiseen

General information

Publication status: Published
MoE publication type: D2 Article in professional manuals or guides or professional information systems or text book material
Organisations: School of Architecture, Research group: Urban Laboratory
Contributors: Hynynen, A.
Number of pages: 19
Pages: 75-93
Publication date: 2015

Host publication information

Title of host publication: Puu-Hubi. : Perinteestä uusiin innovaatioihin
Publisher: Tampereen teknillinen yliopisto. Arkkitehtuurin laitos
Editors: Hynynen, A., Panu, A., Taanila, T.
ISBN (Print): 978-952-15-3497-3
ISBN (Electronic): 978-952-15-3498-0

Research output: Chapter in Book/Report/Conference proceedingChapterProfessional

Extending Professional Fields. Architectural Research and Regional Development

In this article, architectural research work is studied as an effective operations model in regional innovation networks of building clusters. The study focuses on the projects of an academic research team working at the University Centre of Seinäjoki, as well as on the innovation environment of the surrounding South Ostrobothnian region in Western Finland. There is no actual university in the region, but the University Centre hosts some twenty professors and their research teams from six Finnish universities. The head of the subject team is also the author of this article. Because of this, the method applied in the article is a reflective action research approach.

The actions and impacts of the research work will be analysed through three case projects. The first case is the development of the large railway station area that will form a new 20-hectare multifunctional part of the city centre of Seinäjoki. The project has strong linkages to the economic policies of the city. The second case is related to the boom in new timber construction, which has been going on in Central Europe and Scandinavia for some time, but not so strongly in the subject region of this study. The aim of the project was to train small and medium-sized building cluster firms to take advantage of the emerging business potential in timber construction. The third case is closely related to the real speciality of the region. The city of Seinäjoki is home to one of the most complete building groups of architect Alvar Aalto, the famous civic centre that consists of the town hall, library, theatre, office building, church and the parish centre. At the moment there is a very demanding renovation project going on, which was also the main subject of the recent research and development project.

The descriptions of the projects are meant to illustrate the operational field of the research team, but the main focus of the article is to analyse the innovation environment that the researchers join as players among others, thus deviating from the more conventional role of architectural professionals.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: School of Architecture, Research group: Urban Laboratory
Contributors: Hynynen, A.
Number of pages: 12
Pages: 372-383
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: I
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Kähkönen, K., Keinänen, M.
ISBN (Print): 978-952-15-3741-7

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

Future in wood? Timber construction in boosting local development.

Large scale timber construction has been on the upswing for some time in many European countries. Besides the building cluster, also regions and cities have taken advantage of the ongoing timber boom in their economic and spatial development. In this article the focus is on the South Ostrobothnia region and the city of Seinäjoki in Western Finland, where the potential of the business is quite weakly exploited regardless of favourable preconditions. By studying the key actors of the innovation network we are able to better understand the premises of the local development platform that should aim at boosting timber construction.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: School of Architecture, Research group: Urban Laboratory
Contributors: Hynynen, A.
Number of pages: 13
Pages: 127-139
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: European Spatial Research and Policy
Volume: 23
Issue number: 1
ISSN (Print): 1231-1952
Ratings: 
  • Scopus rating (2016): CiteScore 0.28 SJR 0.152 SNIP 0.378
Original language: English
Keywords: Urban development, regional development, timber construction, innovation network, development platform

Research output: Contribution to journalReview ArticleScientificpeer-review

Professional knowledge, skills and competencies of the new graduates and the engineering professionals - Comparison of the importance in working-life

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Policy Academic Engineers and Architects in Finland, TEK
Contributors: Hyötynen, P., Mursu, S., Teini, J.
Publication date: 2014

Host publication information

Title of host publication: SEFI Annual Conference 2014
Place of publication: Brussel
Publisher: European Society for Engineering Education SEFI
ISBN (Print): 978-2-87352-004-5
ASJC Scopus subject areas: Engineering(all), Education
Source: Scopus
Source ID: 84939191998

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

Non-Instantaneous Polarization Dynamics in Resonant Dielectrics

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre
Contributors: Hyyti, J., Hofmann, M., Birkholz, S., Bock, M., Das, S. K., Grunwald, R., Hoffmann, M., Nagy, T., Demircan, A., Jupé, M., Ristau, D., Morgner, U., Brée, C., Woerner, M., Elsaesser, T., Steinmeyer, G.
Publication date: 2015

Host publication information

Title of host publication: 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
Place of publication: Washington, D.C.
Publisher: Optical Society of America
Article number: EE_5b_2
ISBN (Electronic): 978-1-4673-7475-0
Source: Bibtex
Source ID: urn:11581f3548cd9222d9ce827d8dba37e4

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

Liikuntapalveluiden ulkoistaminen ja palveluiden turvallisuus. Nykytilanne ja kuntien kokemukset – Loppuraportti

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Industrial Management, Research group: Safety Management and Engineering
Contributors: Hyytinen, T., Kivistö-Rahnasto, J.
Number of pages: 27
Publication date: 2015

Publication information

Place of publication: Helsinki
Publisher: OPETUS- JA KULTTUURIMINISTERIÖ
ISBN (Electronic): 978-952-263-342-2
Original language: Finnish

Publication series

Name: Opetus- ja kulttuuriministeriön julkaisuja
ISSN (Electronic): 1799-0351

Research output: Book/ReportCommissioned reportProfessional

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

Energy efficiency evaluation method for machine tools

The energy efficiency of machine tools is typically poor and there is potential to increase it. It is possible to effect the energy consumption of a cutting process by selecting suitable process parameters and tools. When the power usage of the machine tool is measured by cutting experiments, the energy efficiency of the machine tool effect of the results and the cutting process has an influence. This paper presents the impact of several cutting parameters affecting the cutting power, the machine tool electric power usage and the efficiency. Furthermore, the possibilities to adjust the cutting power by changing the process parameters is used in developing a shop floor level method for evaluating and comparing performance of different machine tools.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Manufacturing and Automation
Contributors: Ikkala, K., Lanz, M., Kiviö, J., Coatanéa, E.
Number of pages: 8
Pages: 58-65
Publication date: 2015

Host publication information

Title of host publication: Flexible Automation and Intelligent Manufacturing 2015
Publisher: The Choir Press
ISBN (Print): 9781910864005

Bibliographical note

INT=MEI, "Coatanéa, Eric"

Source: Mendeley
Source ID: 4d2d0cbd-8088-335d-bdbe-19e87e0899f4

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

Validation of the method to evaluate the corrosion propagation stage by hygrothermal simulation

Evaluating the propagation period for reinforcement corrosion in concrete facades is an important but complex task which contains a high level of uncertainty. Corrosion current intensity during the propagation period have been measured in a large number of studies and there is a general consensus in regard to factors affecting carbonation induced corrosion. Hence, a proper evaluation of hygrothermal conditions in concrete facade becomes crucial. In this study a method to calculate the corrosion propagation period was validated based upon a field survey of prefabricated concrete facades in large-panel apartment buildings. The method combines existing corrosion propagation models and the Delphin dynamic hygrothermal simulation tool, and takes into consideration material properties, carbonation depth, concrete cover depth, indoor and outdoor climate loads. With the proposed method, propagation consists of a time that is required for a concrete cover to begin cracking and a further expansion of the crack to open to 0.3 mm in width. As a result, the method is validated via the correlation between measured and calculated propagation periods across a range of twenty years. The sensitivity of the results are also studied. The method allows for an evaluation to be carried out on degradation, residual service life, and the need for the renovation of reinforced concrete facades.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Tallinn University of Technology
Contributors: Ilomets, S., Kalamees, T., Lahdensivu, J.
Number of pages: 8
Pages: 1113-1120
Publication date: 2016

Host publication information

Title of host publication: CESB 2016 - Central Europe Towards Sustainable Building 2016: Innovations for Sustainable Future
Publisher: Czech Technical University in Prague
ISBN (Electronic): 9788027102488
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction
Keywords: Concrete damage, Corrosion model, Corrosion propagation, Hygrothermal simulation, Service life

Bibliographical note

EXT="Kalamees, Targo"

Source: Scopus
Source ID: 84986883167

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

Dots-on-the-fly electron beam lithography

We demonstrate a novel approach for electron-beam lithography (EBL) of periodic nanostructures. This technique can rapidly produce arrays of various metallic and etched nanostructures with line and pitch dimensions approaching the beam spot size. Our approach is based on often neglected functionality which is inherent in most modern EBL systems. The raster/vector beam exposure system of the EBL software is exploited to produce arrays of pixel-like spots without the need to define coordinates for each spot in the array. Producing large arrays with traditional EBL techniques is cumbersome during pattern design, usually leads to large data files and easily results in system memory overload during patterning. In Dots-on-The-fly (DOTF) patterning, instead of specifying the locations of individual spots, a boundary for the array is given and the spacing between spots within the boundary is specified by the beam step size. A designed pattern element thus becomes a container object, with beam spacing acting as a parameterized location list for an array of spots confined by that container. With the DOTF method, a single pattern element, such as a square, rectangle or circle, can be used to produce a large array containing thousands of spots. In addition to simple arrays of nano-dots, we expand the technique to produce more complex, highly tunable arrays and structures on substrates of silicon, ITO/ FTO coated glass, as well as uncoated fused silica, quartz and sapphire.

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, Optoelectronics Research Centre, Research group: Nanophotonics
Contributors: Isotalo, T. J., Niemi, T.
Number of pages: 7
Publication date: 2016

Host publication information

Title of host publication: SPIE Proceedings : Alternative Lithographic Technologies VIII
Volume: 9777
Publisher: SPIE
Editor: Bencher, C.
Article number: 97771E
ISBN (Electronic): 9781510600126

Publication series

Name: Proceedings of SPIE
Publisher: SPIE
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Electrical and Electronic Engineering, Applied Mathematics
Keywords: electron beam lithography, nano-fabrication, nano-particle arrays, optoelectronics, periodic nano-structures, plasmonics
Source: Scopus
Source ID: 84981516864

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

Institutionalizing a service innovation in complex networks: The case of developing and diffusing electronic prescription in Finland.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, University of Turku, Turku School of Economics, Deloitte
Contributors: Jaakkola, E., Aarikka-Stenroos, L., Salmivalli, L.
Number of pages: 12
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: Public sector, Innovation, Service providers

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

Recognising the culture context in information search

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-University Kiel
Contributors: Jaakkola, H., Thalheim, B.
Number of pages: 9
Pages: 167-185
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 26th International Conference on Information Modelling and Knowledge Bases - EJC 2016. : June 6-10, 2016, Tampere, Finland.
Volume: 18
Place of publication: Tampere
Publisher: Tampere University of Technology Pori Department
Editors: Jaakkola, H., Thalheim, B., Kiyoki, Y., Yoshida, N.
ISBN (Electronic): 978-952-15-3747-9

Publication series

Name: Tampere University of Technology Pori Department Publications
No.: 18
ISSN (Electronic): 2323-8976

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

Proceedings of the 26th International Conference on Information Modelling and Knowledge Bases - EJC 2016: June 6-10, 2016, Tampere, Finland.

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Pori Department, Research group: Software Engineering and Intelligent Systems, Christian-Albrechts-University Kiel, Keio University, Japan, Komazawa University
Contributors: Jaakkola, H. (ed.), Thalheim, B. (ed.), Kiyoki, Y. (ed.), Yoshida, N. (ed.)
Publication date: 2016

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Electronic): 978-952-15-3747-9
Original language: English

Publication series

Name: Tampere University of Technology, Pori Department Publications
Publisher: Tampere University of Technology
ISSN (Electronic): 2323-8976

Research output: Book/ReportAnthologyScientificpeer-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

Identifying the potential of performance measurement in supporting strategic purchasing and supply chain management

Purchasing and supply management (PSM) is increasingly important part of the success of companies.
Many potential benefits have been identified for PSM performance measurement. However, it appears that
the potential is not always realized and that the research around the topic is limited and dated. PSM takes
increasingly strategic role in companies as an addition to the earlier transaction-oriented role. This study
takes a strategic approach to purchasing highlighting long-term value-creation between purchaser and
provider network. It aims at identifying the topical challenges and potential solutions regarding
performance measurement with the chosen focus and context. The paper is based on a literature review
and analysis, augmented by a survey study in four large Finnish industrial companies (2 service and 2
manufacturing companies). It appears that valuable basic research has been carried out in several relevant
areas of this study. However, empirical studies testing and further elaborating the presented frameworks
and conceptual ideas are hard to find. There also seems to be a certain level of mismatch between the
academic ideal and the prevailing situation and challenges in practice.

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: Jääskeläinen, A., Heikkilä, J., Thitz, O.
Number of pages: 21
Pages: 1-21
Publication date: 2015

Host publication information

Title of host publication: 8th conference on performance measurement and management control
Place of publication: Nice, France
Publisher: The European Institute for Advanced Studies in Management, EIASM

Publication series

Name: Conference on Performance Measurement and Management Control
ISSN (Electronic): 2295-1660

Bibliographical note

Artikkeli julkaistu verkossa, tarvitaan käyttäjätunnus ja salasana.

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

The role of the purchasing function in non-financial value creation

Costs and transactions have been highlighted in the earlier research and practice around purchasing and supply management (PSM). This study investigates in-depth the role of the PSM function in creating non-financial value for the buying company and its customers. Interview study was used to examine four large organizations both in service and manufacturing industries. The findings indicate that relationship value gives a strong potential for developing successful buyer-seller relationships. Service support and personal interaction arise as important differentiators in building the relationships. Key differences across the different contexts existent in this study are also provided.

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: Jääskeläinen, A., Thitz, O., Heikkilä, J.
Publication date: 2016

Host publication information

Title of host publication: 25th Proceedings of IPSERA 2016 conference, : 20-23.3.2016, Dortmund, Germany.

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

The role of performance measurement in supplier-buyer value-creation

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
Contributors: Jääskeläinen, A., Thitz, O., Heikkilä, J.
Publication date: 2017

Host publication information

Title of host publication: Proceedings of 9th Conference on Performance Measurement and Management Control : 13-15 September 2017, Nice, France
Publisher: EIASM

Publication series

Name: Conference on Performance Measurement and Management Control
Publisher: EIASM
ISSN (Electronic): 2295-1660

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 re