Vision-based path coordination for multiple mobile robots with four steering wheels using an overhead camera

In this paper, we extend our previous work to introduce a vision-based path coordination method for multiple mobile robots with four steering wheels to avoid mutual collisions, so that the generated paths are always in the visibility range of the overhead camera. The proposed algorithm generates the synchronized trajectories for all wheels belonging to each mobile robot, with respect to its inertial-frame, relying on only one calibrated camera. These synchronized trajectories reduce the complexity of the robot kinematic model to plan maximum allowable bounded driving and steering velocities for each mobile robot. The main contribution of the proposed method is coordinating the trajectories for multiple mobile robots to avoid intersection boundaries that are obtained by generated geometrical traces in real world coordinates. Our experimental results are presented to illustrate the efficiency of the proposed method for the path coordination of multiple mobile robots with four steering wheels to avoid mutual collision.

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
Contributors: Ziaei, Z., Oftadeh, R., Mattila, J.
Number of pages: 8
Pages: 261-268
Publication date: 1 Jul 2015

Host publication information

Title of host publication:  IEEE International Conference on Advanced Intelligent Mechatronics (AIM), 2015
ISBN (Print): 978-1-4673-9107-8
Keywords: cameras, collision avoidance, mobile robots, robot kinematics, robot vision, steering systems, trajectory control, calibrated camera, multiple mobile robots, overhead camera, robot kinematic model, steering wheels, synchronized trajectories, vision-based path coordination, Cameras, Collision avoidance, Mobile robots, Robot kinematics, Trajectory, Wheels, Four steering wheels, Intersection region, Multiple mobile robots, Nonholonomic mobile robots, Path coordination, Steering and driving velocity, Vision-based method
Source: Bibtex
Source ID: urn:a1ad44c17a4d88dc0b2e6fb580e7e7f2

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

Fabrication and characterization of broadband superluminescent diodes for 2 μm wavelength

Single-mode superluminescent diodes operating at 2 μm wavelength are reported. The structures are based on GaSb material systems and were fabricated by molecular beam epitaxy. Several waveguide designs have been implemented. A continuous-wave output power higher than 35 mW is demonstrated for a spectrum centered at around 1.92 μm. We show that the maximum output power of the devices is strongly linked to spectrum width. Device having low output power exhibit a wide spectrum with a full-width half-maximum (FWHM) as large as 209 nm, while devices with highest output power exhibit a narrower spectrum with about 61 nm FWHM.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications
Contributors: Zia, N., Viheriälä, J., Koskinen, R., Koskinen, M., Suomalainen, S., Guina, M.
Publication date: 2016

Host publication information

Title of host publication: Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX
Publisher: SPIE
Article number: 97680Q
ISBN (Electronic): 9781510600034

Publication series

Name: Proceedings of SPIE
Volume: 9768
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: Gallium antimonide, SLD design, Superluminescent diodes, Tilt waveguide

Bibliographical note

INT=orc,"Koskinen, Mervi"

Source: Scopus
Source ID: 84978727362

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

High performance GaSb superluminescent diodes for tunable light source at 2 μm and 2.55 μm

We report on GaSb-based superluminescent diodes emitting an output power of 70 mW at 2 μm and the first demonstration of 2.55μm SLD with mW-level output power at room temperature for compact gas sensors.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Research group: ORC
Contributors: Zia, N., Viheriälä, J., Koivusalo, E., Aho, A., Suomalainen, S., Guina, M.
Publication date: 2018

Host publication information

Title of host publication: CLEO : Applications and Technology, CLEO_AT 2018
Publisher: OSA - The Optical Society
ISBN (Electronic): 9781557528209
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Mechanics of Materials
Source: Scopus
Source ID: 85049139256

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

Sub-100 fs pulse generation from a Tm,Ho: CALYO laser mode-locked by a GaSb-based SESAM at ~2043 nm

We report on the first sub-100-fs mode-locked Ho3+-laser in the 2-μm spectral range. The disordered co-doped Tm,Ho:CaYAlO4 (Tm,Ho:CALYO) crystal produced pulses as short as 87 fs with 27-mW average output power at 80.45-MHz repetition rate.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Max Born Institute, Jiangsu Normal University, Universitat Rovira i Virgili, China Academy of Engineering Physics, ITMO University, Tongji University
Contributors: Zhao, Y., Wang, Y., Zhang, X., Mateos, X., Pan, Z., Loiko, P., Zhou, W., Xu, X., Xu, J., Shen, D., Suomalainen, S., Härkönen, A., Guina, M., Griebner, U., Petrov, V.
Publication date: 1 Jan 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: 85048984709

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

Samsung and Volkswagen crisis communication in Facebook and Twitter: A comparative study

Since September 2015 at least two major crises have emerged where major industrial companies producing consumer products have been involved. In September 2015 diesel cars manufactured by Volkswagen turned out to be equipped with cheating software that caused NO2 and other emission values to be reduced to acceptable levels while tested from the real, unacceptable values in normal use. In August 2016 reports began to appear that the battery of a new smart phone produced by Samsung, Galaxy Note7, could begin to burn, or even explode, while the device was on. In Nov. 2016 also 34 washing machine models were reported to have caused damages due to disintegration. In all cases, the companies have experienced substantial financial losses, their shares have lost value, and their reputation has suffered among consumers and other stakeholders. In this paper, we study the commonalities and differences in the crisis management strategies of the companies, mostly concentrating on the crisis communication aspects. We draw on Situational Crisis Communication Theory (SCCT). The communication behaviour of the companies and various stakeholders during crisis is performed by investigating the official web sites of the companies and communication in Twitter and Facebook on their own accounts. We also collected streaming data from Twitter where Samsung and the troubled smart phone or washing machines were mentioned. For VW we also collected streaming data where the emission scandal or its ramifications were mentioned and performed several analyses, including sentiment analysis.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Jyväskylän yliopisto, Laboratory of Inductrial and Information Management
Contributors: Zhang, B., Veijalainen, J., Kotkov, D.
Number of pages: 12
Pages: 312-323
Publication date: 2017

Host publication information

Title of host publication: WEBIST 2017 - Proceedings of the 13th International Conference on Web Information Systems and Technologies
Publisher: SCITEPRESS
ISBN (Electronic): 9789897582462
ASJC Scopus subject areas: Computer Networks and Communications, Information Systems
Keywords: Crisis communication strategies, Facebook, Samsung Galaxy Note 7 crisis, Samsung washing machine crisis, SCCT, Sentiment analysis, Twitter, Volkswagen emission crisis
Source: Scopus
Source ID: 85024488684

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

HEVC-compliant viewport-adaptive streaming of stereoscopic panoramic video

Virtual reality (VR) provides unprecedented immersive experience using high-resolution spherical stereoscopic panoramic video. Such an experience is achieved by using head-mounted display (HMD) which has very strict latency bounds in order to respond promptly to user movements. Conventional streaming of VR video requires large bandwidth because the entire captured panorama is transmitted. However, only a limited field-of-view (FOV) is displayed by an HMD, resulting in wastage of bandwidth. To alleviate the problem, this paper proposes a High Efficiency Video Coding (HEVC) compliant approach for efficient coding and streaming of stereoscopic VR content. The proposed method is based on partitioning video pictures into tiles, where only the required tiles corresponding to the primary viewport are transmitted in high resolution, while the remaining parts are transmitted in low resolution. Furthermore, this method enables coding stereoscopic video contents using a conventional HEVC codec, while still achieving significant compression gain by means of adopting inter-view prediction only in intra random access point (IRAP) pictures. Using this method, the predicted view can be decoded independently of the main view, hence allowing simultaneous decoding instances. Experimental results demonstrate that the proposed approach is able to substantially improve compression efficiency and streaming bitrate performance.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Multimedia Research Group - MRG, Nokia
Contributors: Zare, A., Sreedhar, K. K., Vadakital, V. K. M., Aminlou, A., Hannuksela, M. M., Gabbouj, M.
Publication date: 19 Apr 2017

Host publication information

Title of host publication: 2016 Picture Coding Symposium, PCS 2016
Publisher: IEEE
ISBN (Electronic): 9781509059669
ASJC Scopus subject areas: Media Technology, Signal Processing

Bibliographical note

EXT="Vadakital, Vinod Kumar Malamal"

Source: Scopus
Source ID: 85019449939

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

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

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

General information

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

Host publication information

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

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

Benchmarking of several disparity estimation algorithms for light field processing

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

General information

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

Host publication information

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

Publication series

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

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85070208910

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

Vibration analysis of the composite slim floor

Vibration design has been a significant challenge for Composite Slim Floors. An increase in demands for longer spans and uninterrupted floor areas has resulted in floor structures more sensitive to vibration problems caused by human excitation. This paper concentrates on vibration behavior of Composite Slim Floors consisting of pre-cast hollow core slabs and composite slim floor beams. Floor vibrations are studied numerically using finite element (FEM) analysis and Robot Structural Analysis software. An existing car park floor has been used as a case study and the calculated results have been compared with experimental measurements. Both simple and more advanced FEM models are used to investigate whether the Eigen modes are formed by the composite slim floor beams or pre-casted hollow core slabs. Calculated Eigen frequencies are used for evaluating Floor Response. The response is measured by either root-mean-square acceleration or Response Factor. From all of these results effects of vibration for Floor designing are evaluated. The resulted Eigen frequencies and Response Factor values are compared to limit values and guidelines given in design standards. The study gives valuable information about the floor performance and about the potential methods and details which lead to economical slim floor construction with acceptable vibration performance. The contribution of different floor and frame components to Eigen frequencies are also studied.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: University of Oulu, Peikko Group Oy
Contributors: Yrjölä, J., Peltonen, S., Malaska, M.
Number of pages: 6
Publication date: 2014

Host publication information

Title of host publication:  EUROSTEEL 2014 : 7th European Conference on Steel and Composite Structures, 10.-12.9.2014, Naples, Italy
Place of publication: Belgium
Publisher: ECCS - European Convention for Constructional Steelwork
Editors: Landolfo, R., Mazzolani, F.
Article number: 33-494
ISBN (Electronic): 978-92-9147-121-8

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

Two models for hydraulic cylinder

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, Department of Civil Engineering, Research group: Structural Mechanics
Contributors: Ylinen, A., Kouhia, R., Mäkinen, J.
Number of pages: 2
Pages: 115-116
Publication date: 2015

Host publication information

Title of host publication: 2nd International Conference on Multi-Scale Computational Methods for Solids and Fluids : ECCOMAS MSF 2015
Place of publication: Sarajevo
Editors: Ibrahimbegović, A., Ademović, N., Ilić-Georgijević, E., Serdarević, A., Hrasnica, M., Dolarević , S.
Keywords: computational methods, Multi-Scale, Solid

Bibliographical note

Ei löydy isbn

ORG=mei,0.5
ORG=rak,0.5

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

Two models for hydraulic cylinders in flexible multibody simulations

In modelling hydraulic cylinders interaction between the structural response and the hydraulic system needs to be taken into account. In this chapter two approaches for modelling flexible multibody systems coupled with hydraulic actuators i.e. cylinders are presented and compared. These models are the truss-elementlike cylinder and bending flexible cylinder models. The bending flexible cylinder element is a super-element combining the geometrically exact Reissner-beam element, the C1-continuous slide-spring element needed for the telescopc movement and the hydraulic fluid field. Both models are embeded with a friction model based on a bristle approach. The models are implemented in a finite element enviroment. In time the coupled stiff differential equation system is integrated using the L-stable Rosenbrock method.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Civil Engineering, Research group: Structural Mechanics, Department of Mechanical Engineering and Industrial Systems, Research area: Applied Mechanics, FS Dynamics Finland Oy Ab
Contributors: Ylinen, A., Mäkinen, J., Kouhia, R.
Number of pages: 31
Pages: 463-493
Publication date: 2016

Host publication information

Title of host publication: Computational Methods for Solids and Fluids : Multiscale Analysis, Probability Aspects and Model Reduction
Publisher: Springer
ISBN (Print): 978-3-319-27994-7
ISBN (Electronic): 978-3-319-27996-1

Publication series

Name: Computational Methods in Applied Sciences
Volume: 41
ISSN (Print): 1871-3033
ASJC Scopus subject areas: Computational Mathematics, Modelling and Simulation, Fluid Flow and Transfer Processes, Computer Science Applications, Civil and Structural Engineering, Electrical and Electronic Engineering, Biomedical Engineering

Bibliographical note

JUFOID=79940
EXT="Ylinen, Antti"

Source: Scopus
Source ID: 84964233721

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

Multicarrier modulation for HF communications

High-frequency (HF) communications can be flexibly realized using multicarrier modulation techniques. This paper compares the performance of three widely utilized MCM techniques, namely, orthogonal frequency-division multiplexing (OFDM), filter bank multicarrier/offset-QAM (FBMC/OQAM), and filtered multitone (FMT) in HF communications. The performance of these systems is simulated using commonly adopted HF-channel models. It is shown that the simulated uncoded bit-error rate of OFDM is slightly better than that of FBMC/OQAM and FMT. However, with pilot based channel estimation FMT outperforms FBMC/OQAM and OFDM systems in achievable coded frame error rate in case of selective channel models.

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, Kyynel Oy
Contributors: Yli-Kaakinen, J., Renfors, M., Tuomivaara, H.
Number of pages: 7
Publication date: 2016

Host publication information

Title of host publication: 2016 International Conference on Military Communications and Information Systems (ICMCIS)
Publisher: IEEE
ISBN (Print): 9781509017775

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

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

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

General information

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

Publication information

Journal: Chinese Journal of Cancer
Volume: 34
Issue number: 10
Article number: 12
ISSN (Print): 1944-446X
Ratings: 
  • Scopus rating (2015): CiteScore 4.8 SJR 1.081
Original language: English
Keywords: Cancer research, Big data, Mathematical modeling, GASTRIC-CANCER, MODULES
Source: WOS
Source ID: 000360225300001

Research output: Contribution to journalArticleScientificpeer-review

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

General information

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

Host publication information

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

Publication series

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

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

Shared use of research laboratories Changing spatial concepts: A Case Study in a Finnish Biomedical Organization

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: School of Architecture, Research group: Public Buildings, Department of Civil Engineering
Contributors: Yläoutinen, J., Peltoniemi, S., Nenonen, S.
Number of pages: 15
Pages: 183-197
Publication date: 2015

Host publication information

Title of host publication: Conference on Research on Health Care Architecture : ARCH 14 Conference Proceedings November 19-21, 2014, Espoo, Finland
Place of publication: Helsinki
ISBN (Electronic): 978-952-60-6201-3

Publication series

Name: Aalto University publication series ART + DESIGN + ARCHITECTURE, 6/2015
Publisher: Aalto University
ISSN (Print): 1799-4861
ISSN (Electronic): 1799-4853
Keywords: healthcare architecture, hospital architecture, care facilities, hospital environments

Bibliographical note

ORG=ark,0.5
ORG=rak,0.5

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

Markov Chain Monte Carlo Estimation of Stochastic Volatility Models with Finite and Infinite Activity Lévy Jumps: Evidence for Efficient Models and Algorithms

A financial model plays a key role in the valuation and risk management of financial derivatives, and it serves as an important tool for investors to measure the risk exposure of their portfolios and make predictions and decisions. However, the popular affine stochastic volatility models without jumps, such as the Heston model, have been questioned in the finance literature in terms of their appropriateness for modelling stock prices and pricing derivatives. Many alternative model specifications have been proposed in recent decades, including the specification of non-affine variance dynamics and the inclusion of Lévy jumps. However, the complexity introduced by further model specifications leads to poor probabilistic properties, and hence most popular estimation methods are not applicable. The Bayesian estimation method is among the few that work. In this thesis, I discuss the role of new model specifications and investigate the performance of Bayesian estimation methods. First, I use an extensive empirical data set to study how the use of infinite-activity Lévy jumps in stock returns and variance improves model performance. The stock returns and variance are driven by diffusions and different Lévy jumps, including the finite-activity compound Poisson jump and infinite-activity Variance Gamma and Normal Inverse Gaussian (NIG) jumps. Moreover, the non-affine linear variance process is compared to the affine square-root stochastic process. With the conventional Markov Chain Monte Carlo (MCMC) algorithms, including the Gibbs sampler and Metropolis-Hastings (MH) methods, and the Damien-Wakefield-Walker method to cope with complicated posteriors, eighteen different model specifications are estimated using the joint information of the S&P 500 index and the VIX index for 1996 – 2009. There is clear evidence that in terms of the goodness of fit and option pricing performance, a relatively parsimonious model with infinite-activity NIG jumps in returns and non-affine variance dynamics is particularly competitive. In the second part of the thesis, I examine the performance of advanced MCMC algorithms. The efficiency of the MH algorithm has been questioned because of its slow mixing speed, especially in the presence of high dimensions and a strong dependence between model parameters and state variables. Generally, a class of algorithms seeks to improve the MH by constructing more effective proposals, and another combines the MCMC with the Sequential Monte Carlo algorithms. To investigate, I first conduct simulation studies to compare the estimation performance of seven advanced Bayesian estimation methods against the MH. Specifically, I use the affine Heston model, the affine Bates model, and an affine model with NIG return jumps, and examine whether the different jump structures affect the estimation results. Second, I estimate the non-a ffine model with NIG return jumps using the joint information of the S&P 500 index and the VIX for 2002–2005 with selected algorithms that perform well in the simulation studies. The results of the simulation and empirical studies are mixed about the performance of the algorithms. The Fast Universal Self-tuned Sampler algorithms are particularly competitive in generating virtually independent samples and achieving the fastest mixing with a fixed number of MCMC runs, and their performance is stable regardless of the model specifications. However, they are computationally expensive. The computational costs of the Particle Markov Chain Monte Carlo (PMCMC) methods are much cheaper and also efficient in mixing, and they perform best when estimating the models without jumps/with NIG jumps in the simulation studies, as well as in the fit to the VIX in the empirical studies. However, the PMCMC methods are more vulnerable to model specifications than the other algorithms; in particular, the rare large compound Poisson jumps in the Bates model significantly reduce the acceptance rate and worsen the estimation performance of the PMCMC methods.

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Industrial Management, Research group: Financial Engineering
Contributors: Yang, H.
Number of pages: 107
Publication date: 13 Nov 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3597-0
ISBN (Electronic): 978-952-15-3617-5
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1331
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisMonograph

Visibility-Aware Part Coding for Vehicle Viewing Angle Estimation

A number of spatially-localised semantic parts of vehicles sensitive to pose changes are encoded their visible probabilities into a mid-level feature vector. Car pose estimation is then formulated into a regression on concatenated low-and mid-level features to continuously changing viewing angles. Each dimension of our visibility-Aware part codes separates all the training samples into two groups according to its visual existence in images, which provides additional part-specific range constraint of viewing angles. Moreover, the proposed codes can alleviate the suffering from sparse and imbalanced data distribution in the light of modelling latent dependency across angle targets. Experimental evaluation for car pose estimation on the EPFL Multi-View Car benchmark demonstrates significant improvement of our method over the state-of-The-Art regression methods, especially when only sparse and imbalanced data is available.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, Research group: Vision, South China University of Technology
Contributors: Yang, D., Qian, Y., Cai, D., Yan, S., Kämäräinen, J., Chen, K.
Number of pages: 6
Pages: 65-70
Publication date: 1 Aug 2019

Host publication information

Title of host publication: 9th International Conference on Information Science and Technology, ICIST 2019
Publisher: IEEE
ISBN (Electronic): 9781728121062
ASJC Scopus subject areas: Computer Science Applications, Computer Vision and Pattern Recognition, Information Systems, Computational Mathematics, Control and Optimization
Keywords: Car pose estimation, Coding, Pose-sensitive parts, Regression forests, Visibility-Aware

Bibliographical note

EXT="Chen, Ke"
jufoid=79229

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

Hierarchical deformable part models for heads and tails

Imbalanced long-tail distributions of visual class examples inhibit accurate visual detection, which is addressed by a novel Hierarchical Deformable Part Model (HDPM). HDPM constructs a sub-category hierarchy by alternating bootstrapping and Visual Similarity Network (VSN) based discovery of head and tail sub-categories. We experimentally evaluate HDPM and compare with other sub-category aware visual detection methods with a moderate size dataset (Pascal VOC 2007), and demonstrate its scalability to a large scale dataset (ILSVRC 2014 Detection Task). The proposed HDPM consistently achieves significant performance improvement in both experiments.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Vision
Contributors: Yancheshmeh, F. S., Chen, K., Kämäräinen, J.
Number of pages: 11
Pages: 45-55
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: 5
Publisher: SCITEPRESS
ISBN (Electronic): 9789897582905
ASJC Scopus subject areas: Computer Vision and Pattern Recognition, Computer Graphics and Computer-Aided Design, Artificial Intelligence
Keywords: Deformable part model, Imbalanced datasets, Localization, Long-tail distribution, Object detection, Sub-category discovery, Visual similarity network
Source: Scopus
Source ID: 85047826548

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

An anisotropic continuum damage model for concrete

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

General information

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

Host publication information

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

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

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

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

General information

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

Host publication information

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

Publication series

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

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85066046508

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

Switchable unidirectional second-harmonic emission through GaAs nanoantennas

Switching the scattering direction of high-index dielectric nanoantennas between forward and backward, via Mie resonances in the linear regime, has been widely studied, recently. However, switching the harmonic emission of nanoantennas without applying any physical change to the antennas, such as geometry, or environment, is a chal-lenging task that has not been demonstrated yet. Here, we investigate multipolar second-harmonic switch from GaAs nanoantennas. Based on the peculiar nonlinearities of zinc-blende semiconductors, we demonstrate both theoretically and experimentally unidirectional nonlinear emission routing and switching via pump polarization control. Our results offer exciting opportunities for nonlinear nanophotonics technologies, such as nanoscale light routing elements, nonlinear light sources, nonlinear imaging, multifunctional flat optical elements.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Nonlinear Optics, Physics, School of Engineering and Information Technology, University of New South Wales (UNSW) Australia, HCI e 486.1, Australian National University, Institute of Applied Physics of the Russian Academy of Sciences
Contributors: Xu, L., Saerens, G., Timofeeva, M., Miroshnichenko, A. E., Camacho-Morales, R., Volkovskaya, I., Smirnova, D. A., Lysevych, M., Huang, L., Cai, M., Karouta, F., Hoe Tan, H., Kauranen, M., Jagadish, C., Grange, R., Neshev, D. N., Rahmani, M.
Publication date: 2019

Host publication information

Title of host publication: AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
Publisher: SPIE
Editors: Mitchell, A., Rubinsztein-Dunlop, H.
Article number: 112000J
ISBN (Electronic): 9781510631403

Publication series

Name: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 11200
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: Dielectric nanoresonators, Mie resonance, Second harmonic generation, Unidirectional emission

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85079683447

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

Teacher’s Perceptions and Readiness to Teach Coding Skills: A Comparative Study Between Finland, Mainland China, Singapore, Taiwan, and South Korea

Many education systems have recognized the importance of computational thinking and coding skills and are implementing curricular changes to introduce coding into formal school education. A necessary and critical success factor involves the preparation of and support for teachers to teach coding. Thus, understanding the perceptions of teachers towards coding is most important, together with knowing the kinds of support they received, and their readiness and challenges to teach. The purpose of the current study is to compare teachers’ attitudes towards the importance of information and communications technologies (ICT) skills and coding skills in Finland, Mainland China, Singapore, Taiwan, and South Korea. The findings indicate that teachers in Finland, Singapore, Taiwan, and South Korea believe that coding is useful even if students will not work in ICT jobs while Mainland Chinese teachers are undecided. Mainland China, Singapore, Taiwan, and South Korea have more positive views towards how to prepare for future-ready learners.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Computing Sciences, National Institute of Education, Satakunta University of Applied Sciences, Chuncheon National University of Education, Taiwan Normal University
Contributors: Wu, L., Looi, C. K., Multisilta, J., How, M. L., Choi, H., Hsu, T. C., Tuomi, P.
Number of pages: 14
Publication date: 30 Sep 2019
Peer-reviewed: Yes

Publication information

Journal: Asia-Pacific Education Researcher
ISSN (Print): 0119-5646
Ratings: 
  • Scopus rating (2019): CiteScore 2.3 SJR 0.449 SNIP 1.017
Original language: English
ASJC Scopus subject areas: Education
Keywords: Attitudes, Coding skills, Comparative research, Computational thinking, Primary school, Twenty first century skills

Bibliographical note

EXT="Multisilta, Jari"

Source: Scopus
Source ID: 85074064375

Research output: Contribution to journalArticleScientificpeer-review

Proceedings of the 25th International Conference on Information Modelling and Knowledge Bases (EJC 2015), 8-12 June, 2015, Maribor, Slovenia

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Pori Department, Research group: Software Engineering and Intelligent Systems, University of Maribor, Slovenia, Keio University, Japan, Christian-Albrechts-Universität zu Kiel
Contributors: Welzer , T. (ed.), Hölbl, M. (ed.), Kiyoki, Y. (ed.), Thalheim, B. (ed.), Jaakkola, H. (ed.)
Publication date: 2015

Publication information

Place of publication: Maribor, Slovenia
Publisher: University of Maribor, Faculty of Electrical Engineering and Computer Science
ISBN (Electronic): 978-961-248-486-6
Original language: English

Research output: Book/ReportAnthologyScientificpeer-review

In-band-pumped mode-locked Ho:YAG ceramic laser at 2.1 μm

SESAM mode-locking of a Ho:YAG ceramic laser operating near 2.1 µm is reported achieving a pulse duration of 8 ps and output power as high as 258 mW at a repetition rate of ~83 MHz.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications
Contributors: Wang, Y., Lan, R., Mateos, X., Li, J., Pan, Y., Suomalainen, S., Härkönen, A., Guina, M., Griebner, U., Petrov, V.
Number of pages: 2
Pages: 1-2
Publication date: Jun 2016

Host publication information

Title of host publication: 2016 Conference on Lasers and Electro-Optics (CLEO)
Publisher: IEEE
ISBN (Electronic): 978-1-943580-11-8
Keywords: ceramics, holmium, laser beams, laser mirrors, laser mode locking, optical pumping, optical saturable absorption, solid lasers, yttrium compounds, SESAM mode-locking, YAG:Ho, in-band-pumped mode-locked Ho:YAG ceramic laser, output power, power 258 mW, pulse duration, time 8 ps, wavelength 2.1 mum, Ceramics, Gas lasers, Laser excitation, Laser mode locking, Power generation, Power lasers, Pump lasers
Source: Bibtex
Source ID: urn:487a5ec4dd0da809c9267dca5fd5b7f4

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

Improving project control by combining earned value analysis and automatic data collection

Efficient control is critical for project success. One of the most widely discussed project control methods is earned value analysis (EVM). The accuracy of EVM calculations can be improved by combining it with automatic data collection (ADC). This paper analyzes the possibilities of combining EVM and ADC, and the main benefits and challenges related to that. A literature review was conducted to answer these questions. The study demonstrates how the problems related to the evaluation of activity progress have received surprisingly little research focus, and how ADC could be utilized to improve this area of EVM. The benefits of ADC are also not limited to just EVM; despite the choice of a project control methodology, ADC can be utilized to evaluate project progress in a continuous and more accurate way. Finally, it is demonstrated how even the “ADC-enhanced EVM” doesn’t provide an adequate image of project status alone; EVM has to be combined with other project control methodologies. Based on the literature review, several areas for further research are also proposed.

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: Vuorinen, L., Sariola, R.
Number of pages: 17
Pages: 1
Publication date: 2015

Host publication information

Title of host publication: International Research Network in Organizing by Projects Conference 2015 : IRNOP
Place of publication: London, U.K.

Bibliographical note

Sariola vastannut: ei isbn

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

Practice of project control under different levels of complexity in engineering projects

Different projects require different management practices. Project control has been identified as increasingly relevant as the scope and complexity of the project and project deliverable increases. Earlier research has identified several antecedents of control differences in different projects. However, one central contingency of a project, project complexity, has received little focus in project control discussion. In addition, earlier research has focused on project control particularly in the context of information systems (IS) projects. This study explores the different approaches to project control across projects with different degrees of complexity. A qualitative embedded case study is carried out in an engineering industry firm delivering customer-specific systems and solutions. The results on the three different delivery project cases show, how the
relative importance of social clan control and the intensity of control increases with the more complex projects. In addition, the importance of input control, collaborative and multi-directional control and control ambidexterity in complex projects are also highlighted. The study contributes by following a contingency approach to project management research and by obtaining results from a context seldom covered by the project control literature.

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: Vuorinen, L., Martinsuo, M.
Number of pages: 30
Publication date: 1 Jun 2016

Host publication information

Title of host publication: EURAM (European Academy of Management) conference 2016 : Manageable cooperation? June 1-4, 2016 Paris
Keywords: project complexity, project control, contingency theory

Bibliographical note

JUFOID=71900

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

Managing different types of changes during the lifecycle of a complex delivery project

Delivery projects are a way for a project contractor to solve a customer’s need by delivering a customer-specific tailored solution. The success of these delivery projects is focal for both the project contractor and the customer. One way for the project contractor to promote the success of a delivery project is to plan the project well and to follow a project management methodology. However, despite the planning efforts and project management methodologies, various changes typically take place throughout the project lifecycle. There can be changes both compared to the plans and to the project management methodology and this article focuses on both types of changes and change management in delivery projects. The findings of a case study research reveal, how changes take place throughout the lifecycle of a delivery project, how there are external and internal reasons behind the changes and how both change management activities and improvisational actions are taken by project personnel to manage the changes. The findings also highlight the customer’s role as a source for changes and the different personnel’s role in performing either the change management activities or the improvisational actions. The findings of the study are discussed in relation to the literature on changes and change management in projects and to the literature on improvisation in projects.

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: Vuorinen, L., Martinsuo, M.
Number of pages: 33
Publication date: Jun 2017

Host publication information

Title of host publication: The 2017 European Academy of Management (EURAM) Conference : Glasgow, Scotland, 21-24 June, 2017.
Publisher: EURAM

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

Knowledge barriers in university-industry knowledge networks

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: Vuori, V., Helander, N.
Number of pages: 8
Pages: 952-959
Publication date: 2 Sep 2016

Host publication information

Title of host publication: 17th European Conference on Knowledge Management, At Belfast, Northern Ireland, UK. : 1-2 Sep. 2016
Publisher: Academic Conferences and Publishing International Limited Reading
ISBN (Electronic): 978-1-911218-03-6

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

Knowledge management practices to overcome network-level knowledge barriers: an artificial intelligence powered literature review

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management, Research group: Knowledge and Learning Research Center
Contributors: Vuori, V., Helander, N.
Publication date: Jun 2019

Host publication information

Title of host publication:  Proceedings of International Forum on Knowledge Asset Dynamics 2019 : 5-7 June 2019, Matera, Italy
ISBN (Electronic): 978-88-96687-12-3

Publication series

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

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

Discovering collaborative and inclusive solutions to co-create multidimensional value in cross-sector collaboration

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management, Research group: Knowledge and Learning Research Center, Hanken School of Economics
Contributors: Vuori, V., Bor, S., Polsa, P., Käpylä, J., Helander, N.
Number of pages: 6
Pages: 364-369
Publication date: Sep 2019

Host publication information

Title of host publication: Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management : 17-19 September, 2019, Vienna, Austria
Publisher: SCITEPRESS
ISBN (Print): 9789897583827

Publication series

Name: IC3K 2019 - Proceedings of the 11th International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management
Volume: 3

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

Emotion measurement services for knowledge workers

In order to understand and manage how emotions affect knowledge work, organizations need proper tools to become aware of emotions. Measuring emotions is an approach to consider. In this paper, three dif-ferent emotion measurement services are tested: daily experience sur-vey, electrodermal activity ring and self-tracking of emotions. The paper provides new insights and user experiences of emotion measurement services and their applicability in daily knowledge work. Managerial guidelines are drawn up for planning and executing emotion measure-ment services in an organization for two purposes – self-development and measuring company pulse.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Information Management and Logistics, Research group: Novi, Department of Information Management and Logistics, Intopalo Oy
Contributors: Vuolle, M., Salonius, H., Lintinen, J., Mäkinen, J.
Number of pages: 20
Publication date: 2015

Host publication information

Title of host publication: RESER2015 : 25th Annual RESER Conference, September 10-12, 2015 Copenhagen, Denmark
Place of publication: Copenhagen
Publisher: RESER European Association for Research on Services
ISBN (Electronic): 978-87-7349-921-4
Keywords: Knowledge work , Emotions, Measurement, self-management

Bibliographical note

AUX=tlo,"Lintinen, Johanna"

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

Performance management practices in construction business - a service recovery perspective

This paper studies how service recovery perspective can be utilized in order to improve performance management practices in construction industry in Finland. The purpose is to redesign service recovery encounters to better handle negative customer experiences when service failure or other problem has occurred. From performance management point of view, the key challenge is to manage negative customer experiences in order to avoid negative impacts on the performance of the company. The analysis focuses on how negative customer encounters can be used as a source of learning and thus, improving customer and employee satisfaction and the whole image of the industry.
Literature on service failure and recovery discusses various components of unsuccessful customer experience, their cognitive elements and ways of reacting to service failures. However, this discussion is separated from the business performance management literature. Theoretically the paper combines methods from service management and performance management and contributes with its holistic approach to the role of service quality in construction business.
Empirical data was gathered first by interviewing 16 employees and customer engaging to customer service in 4 construction companies. The purpose was to identify the key pitfalls and practices of service recovery encounters in three main phases of the customer journey: 1) buying and planning a new home, 2) construction period, and 3) living in a new home). After interviews, two workshops in two companies were organized to reflect findings and to improve and create new service recovery encounter practices.
As a result, three performance management practices were identified: 1) guideline for customer recovery encounters, 2) developing systematic service recovery process and related quality metrics, and 3) developing the service oriented attitude and recovery of employees.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Information Management and Logistics, Research group: Novi
Contributors: Vuolle, M., Sillanpää, V.
Number of pages: 17
Publication date: 2015

Host publication information

Title of host publication: 8th Conference on Performance Measurement and Management Control
Publisher: The European Institute for Advanced Studies in Management, EIASM

Publication series

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

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

Action recognition using the 3D dense microblock difference

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

General information

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

Host publication information

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

Publication series

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

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85057423236

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

New tools to help in the recruitment process

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research area: Information Technology for Biology and Health, Research area: Intelligence in Machines, Research group: MMDM, Research area: Signal and Information Processing, Pori Department
Contributors: Visa, A., Einolander, J., Vanharanta, H.
Number of pages: 7
Pages: 653–659
Publication date: 2015

Host publication information

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

Publication series

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

Bibliographical note

ORG=sgn,0.5
ORG=pla,0.5

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

Proceedings of the Detection and Classification of Acoustic Scenes and Events 2016 Workshop (DCASE2016)

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Signal Processing, Research group: Audio research group
Contributors: Virtanen, T. (ed.), Mesaros, A. (ed.), Heittola, T. (ed.), Plumbley, M. D. (ed.), Foster, P. (ed.), Benetos, E. (ed.), Lagrange, M. (ed.)
Number of pages: 119
Publication date: 2016

Publication information

Publisher: Tampere University of Technology. Department of Signal Processing
ISBN (Electronic): 978-952-15-3807-0
Original language: English

Research output: Book/ReportAnthologyScientificpeer-review

Simulation studies of DFB laser longitudinal structures for narrow linewidth emission

Simulation studies targeting high-power narrow-linewidth emission from DFB lasers are presented. The linewidth and output power calculations take into account the mirror losses, including the grating and the facets, as well as spontaneous emission noise, effective refractive index, power and carrier density variations inside the cavity. The longitudinal power and carrier density distributions have been evaluated and their effects on longitudinal spatial hole burning and possible side mode lasing are discussed.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications
Contributors: Virtanen, H., Uusitalo, T., Dumitrescu, M.
Number of pages: 2
Pages: 153-154
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): 9781467386036
ASJC Scopus subject areas: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Modelling and Simulation, Numerical Analysis
Source: Scopus
Source ID: 84987641768

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

New value chains to construction: advancing products and services

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: Virtanen, J., Hyyppä, H., Ståhle, P., Kalliokoski, S., Kähkönen, K. E., Ahlavuo, M., Launonen, P., Hyyppä, J., Kukko, A., Julin, A.
Number of pages: 12
Pages: 954-965
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 20th CIB World Building Congress 2016 : Advancing products and services
Volume: V
Publisher: Tampere University of Technology. Department of Civil Engineering
Editor: Achour, N.
ISBN (Electronic): 978-952-15-3745-5
Keywords: value chain, additive manufacturing, 3D measuring, augmented reality, digitalization
Source: Bibtex
Source ID: urn:a71b2e8aff713ed96c4a2301f007eb7b

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

Kactus2: A graphical EDA tool built on the IP-XACT standard

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Pervasive Computing, Research area: Computer engineering, Research area: Computer engineering
Contributors: Virtanen, J., Kamppi, A., Pekkarinen, E., Määttä, J., Järvinen, J., Matilainen, L. J., Teuho, M., Hämäläinen, T.
Number of pages: 1
Pages: 1
Publication date: 2 May 2017
Peer-reviewed: Yes

Publication information

Journal: The Journal of Open Source Software
Volume: 2
Issue number: 13
ISSN (Print): 2475-9066
Original language: English
Keywords: IP-XACT, EDA, reuse, mpsoc, design, system-on-chip, Hardware
Electronic versions: 

Bibliographical note

INT=tie,"Järvinen, Juho"

Research output: Contribution to journalArticleScientificpeer-review

Projektioppiminen yläkoulun matematiikassa

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Mathematics
Contributors: Viro, E., Eriksson, S.
Number of pages: 5
Pages: 1005-1009
Publication date: 2015
Peer-reviewed: Unknown

Publication information

Journal:  LUMAT: International Journal on Math, Science and Technology Education
Volume: 3
Issue number: 7
ISSN (Print): 2323-7112
Original language: Finnish

Research output: Contribution to journalArticleProfessional

Projektityöskentelyn kehittäminen yläkoulun matematiikan opetuksessa

Perusopetuksen opetussuunnitelman perusteiden 2014 aikana ovat ilmiölähtöinen oppiminen ja projektiluontoinen työskentely lisääntyneet peruskouluissa merkittävästi. Tässä tutkimuksessa tarkastellaan oppilaan ja opettajan näkökulmasta lähinnä yläkoulun matematiikan opetukseen liitetyn projektityöskentelyn kehittämiskohteita sekä niihin mahdollisia kehittämisehdotuksia. Tutkimusaineistoa on kerätty kyselylomakkeilla ja havainnoinnilla LUMA Suomen Projektioppiminen-kehittämishankkeesta, StarT-projektikilpailusta ja Teknologiateollisuuden My TecH –ohjelmasta. Tutkimukseen osallistui 365 oppilasta ja 19 opettajaa. Projektityöskentelyn suurimmat haasteet voidaan luokitella oppilaan ja opettajan toimintaan, itse projektiin tai koulutoiminnan puitteisiin liittyviksi. Jokaiseen osa-alueeseen opettaja voi omalla toiminnallaan vaikuttaa.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Mathematics, Tampereen yliopisto
Contributors: Viro, I. E., Joutsenlahti, J.
Number of pages: 10
Pages: 90-99
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: FMSERA Journal
Volume: 2
Issue number: 1
ISSN (Print): 2489-4583
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-review

Embroidered antennas and antenna-electronics interfaces for wearable RFID tags

We summarize the possibilities of embroidery with conductive yarn in the fabrication of antennas and antenna-electronics interconnections for wearable RFID tags. Based on our results, both fabrication time and amount of conductive yarn used in fabrication of a dipole antenna can be saved by selecting dense or parse stitching for different regions of the antenna, or by sewing only the antenna borderline. Moreover, we fabricated the antenna-IC interconnection by sewing through the pads of the fixture carrying the IC during the antenna fabrication. Our wearable prototype tag showed excellent wireless performance, and was detectable at distances of 6 and 2 meters, in air and on the human body, respectively.

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: Virkki, J., Chen, X., Björninen, T., Ukkonen, L.
Number of pages: 3
Publication date: 20 Sep 2017

Host publication information

Title of host publication: IMWS-AMP 2017 International Microwave Workshop Series on Advanced Materials and Processes
Publisher: IEEE
ISBN (Print): 978-1-5386-0480-9

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

Uudessa COMBI-hankkeessa tutkitaan energiatehokkaan palvelurakentamisen haasteita ja ratkaisuja

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics, School of Architecture, Research group: ASUTUT, Research area: Structural Engineering, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Real estate development, Research group: Service Life Engineering of Structures, Aalto University, Tampere University of Applied Sciences TAMK
Contributors: Vinha, J., Hedman, M., Sirén, K., Harsia, P., Pentti, M., Teriö, O., Heljo, J., Laukkarinen, A., Annila, P., Kaasalainen, H., Jokisalo, J., Pihlajamaa, P.
Number of pages: 10
Pages: 487-496
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.
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
No.: 4
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction

Bibliographical note

ORG=rak,0.8
ORG=ark,0.2

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

Rakennusfysiikka 2015. Uusimmat tutkimustulokset ja hyvät käytännön ratkaisut: 20.-22.10.2015, Tampere. Seminaarijulkaisu 4

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Vinha, J. (ed.), Ruuska, T. (ed.)
Publication date: 2015

Publication information

Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto. Rakennustekniikan laitos
ISBN (Print): 978-952-15-3580-2
Original language: Finnish

Publication series

Name: Tampereen teknillinen yliopisto, rakennustekniikan laitos, rakennetekniikka, seminaarijulkaisu
Publisher: Tampereen teknillinen yliopisto

Research output: Book/ReportAnthologyScientificpeer-review

Uusi Rakennusfysiikan käsikirja - perustiedot rakennusfysikaalisesta suunnittelusta ja tutkimuksista

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Vinha, J.
Number of pages: 6
Pages: 115-120
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

Uusi Rakennusfysiikan käsikirja

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Vinha, J.
Number of pages: 6
Pages: 167-172
Publication date: 2015

Host publication information

Title of host publication: Sisäilmastoseminaari 2015
ISBN (Print): 9789525236439

Publication series

Name: Sisäilmastoyhdistys raportti
No.: 33
ISSN (Electronic): 1237-1866

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

Rakennusten rakennusfysikaalisen suunnittelun ja toteutuksen periaatteet

General information

Publication status: Published
MoE publication type: D2 Article in professional manuals or guides or professional information systems or text book material
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Vinha, J.
Number of pages: 28
Pages: 399-426
Publication date: 2015

Host publication information

Title of host publication: Rakentajain kalenteri 2016
Publisher: Rakennustieto Oy

Publication series

Name: Rakentajain kalenteri
Publisher:  Rakennustieto Oy
Volume: 100
ISSN (Print): 0355-550X
ISSN (Electronic): 1799-9391

Research output: Chapter in Book/Report/Conference proceedingChapterProfessional

The behaviour of transverse bar reinforcement of slim floor beams in precast floors

Typical slim floor construction consists of precast hollow core slabs supported on shallow steel beams. The steel beams are contained within the depth of the floor slab and the floor beams can be detailed as either composite or bare steel beams. The joints between precast elements are reinforced with transverse steel rebars and are then filled with concrete. The transverse bars are installed through holes in the web of a special perforated steel beam profile. In this research the behaviour of the transverse rebars is studied numerically using Abaqus/Cae FEM-modelling software. The aim of this study is to investigate the effects of the transverse reinforcement on the composite beam behaviour and on the crack formation at the longitudinal interface between steel beam web and concrete. The numerical modelling of the transverse rebars and the local behaviour of rebar within the cracked area is of special interest. The numerical analysis results are compared with and validated by experimental test results carried out with similar floor beam structures. Based on the analysis results, the load paths within the slim floor construction and the effect of transverse reinforcement on floor beam behaviour are discussed.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: University of Oulu
Contributors: Vinberg, M., Malaska, M., Peltonen, S.
Number of pages: 6
Publication date: 2014

Host publication information

Title of host publication: Eurosteel 2014 : 7th European Conference on Steel and Composite Structures, 10.-12.9.2014, Naples, Italy
Place of publication: Belgium
Publisher: ECCS - European Convention for Constructional Steelwork
Editors: Landolfo, R., Mazzolani, F.
Article number: 33-493
ISBN (Electronic): 978-92-9147-121-8

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

Feasibility of electric buses in public transport

This study examines the economic feasibility of electric buses in a mid-sized city, where public transport is currently organized with buses only. The difference in lifetime cost of electric buses and diesel buses was calculated with the chosen parameters that were selected after careful background analysis. A viable business case can be created when the battery and the charging infrastructure are selected shrewdly. The electricity is much cheaper fuel than diesel but with the current battery technologies and battery prices the significant cost from operating an e-bus comes from the wear of the battery. Two types of Li-ion batteries were compared, LFP (Lithium Iron Phosphate) and LTO (Lithium Titanate). Also different conductive opportunity charging strategies were examined: 1. Charging at the depot. 2. Charging at the end stop(s). 3.
Charging at the line stops.
The round trip line length assessed was 20 km. Calculations show that the LTO buses and a fast charger at the end stop complemented with low power overnight chargers at the depot is the best investment combination based on the given assumptions. The 200 kW charging power is sufficient to ensure the charging in the normal end stop breaks. Due to a longer cycle life the wear cost per km was lower for LTO than for LFP. LTO is also better adapted for fast charging. The battery size has to be sufficient compared to the required driving range during peak consumption, to the charging current and to the performance requirements of the e-bus. Oversizing the battery has some positive effects (improved cycle life, less heating and better flexibility) but the negative effects were estimated to be more significant (higher investment cost, increased weight and space requirement).

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Electrical Engineering, Research area: Power engineering
Contributors: Vilppo, O., Markkula, J.
Number of pages: 9
Publication date: 3 May 2015

Host publication information

Title of host publication: EVS28 28th International Electric Vehicle Symposium and Exhibition

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

Fully printed memristors for a self-sustainable recorder of mechanical energy

Memristors have attracted significant interest in recent years because of their role as a missing electronic component and unique functionality that has not previously existed. Since the first discoveries of the existence of memristive materials, various different fabrication processes for memristors have been presented. Here, a simple additive fabrication process is demonstrated where memristors were deposited on a polymer substrate by conventional inkjet printing. The memristor structure was printed on a 125 μ m thick polyethylene terephthalate (PET) substrate by sandwiching a thin layer of TiO x between two silver nanoparticle ink electrodes. Current–voltage ( IV ) characterization measurements were performed and they showed clear memristive behavior when voltage pulse amplitude varied between −1.5 V and 1.5 V. The corresponding resistance change is approximately between 150 Ω and 75 kΩ. In order to demonstrate the switching scheme in practical application, printed memristors and a printed voltage doubler were connected with a piezoelectric element. The element was subjected to impact-type excitation thus producing an electric charge that was able to switch the memristor between high and low resistive states. These results pave the way for an exploitation of cost-efficient, self-sufficient, all-printable memory elements for wide utilization in future electronics applications.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Department of Automation Science and Engineering, Research area: Microsystems, Research area: Measurement Technology and Process Control
Contributors: Vilmi, P., Nelo, M., Voutilainen, J., Palosaari, J., Pörhönen, J., Tuukkanen, S., Jantunen, H., Juuti, J., Fabritius, T.
Number of pages: 8
Publication date: 19 Apr 2016
Peer-reviewed: Yes

Publication information

Journal: Flexible and Printed Electronics
Volume: 1
Issue number: 2
Article number: 025002
ISSN (Print): 2058-8585
Original language: English
Source: Bibtex
Source ID: urn:93364f0c9fc6d11e220f8d004617b3a2

Research output: Contribution to journalArticleScientificpeer-review

Empowerment in construction: a qualitative analysis of subcontractors' quality assurance

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Viita, J., Junnonen, J.
Pages: 436-448
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

Effect of Inductor Saturation on the Harmonic Currents of Grid-Connected Three-Phase VSI in PV Application

The optimal design of a VSI based photovoltaic (PV) inverter has been studied extensively during the last years. The focus in these studies has been in the selection of the reactive components of the LCL-filter, leaving the inductor design out from the discussion. However, the inductor design plays important role when the design target is to minimize the size and the cost of the filter. Unfortunately, the minimization of the filter size might yield saturating inductors. In this paper, the effect of inductor saturation on the harmonic currents of grid-connected three-phase PV inverter is studied by simulations and measurements on a prototype inverter. The results indicate that application of saturating inductors increases the fifth and seventh harmonics in the output current of the inverter when it is operating at open-loop. However, these harmonics are effectively attenuated when the inverter is operated at closed-loop.

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: Viinamäki, J., Jokipii, J., Suntio, T.
Number of pages: 8
Pages: 1209-1216
Publication date: 2015

Host publication information

Title of host publication: 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia), 1-5 June 2015, Seoul
Publisher: IEEE
ISBN (Print): 978-89-5708-254-6
Keywords: Inductor nonlinearity, inductor saturation, PV inverter design, three-phase inverter

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

Heat Loss Rate of the Finnish Building Stock

This paper presents a bottom-up model for studying the heat loss rate of the building stock.The model is a step towards more complex building-stock power modeling, whose goal is topredictthe sources and the amount of demand response potential under different conditions. The heat loss rate is the fraction of thermal power needed to compensate for the heat loss via exterior walls, windows, roofs, floors and ventilation in the buildings. The heat loss rate depends on the physical characteristics of the building envelope and ventilation andon weather conditions.

We first examine the current state of power and energy modeling. We then describe the research object of this study and the calculation method. The calculation results presented in the third section are illustrated at the hourly level, sorted by the main source of the heating energy of the building. In addition to the analysis of the building stock level, the heat loss rate was calculated on a building level using some typical building information models for validation purposes. The validation indicated that the results obtained with the two methods were consistent and that the order of magnitude was reasonable. The Finnish building stock was used as a research object in the demonstration of the model. Finally, some further needs for research are discussed.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Real estate development, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Service Life Engineering of Structures
Contributors: Vihola, J., Sorri, J., Heljo, J., Kero, P.
Number of pages: 8
Pages: 601-608
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
Source: RIS
Source ID: urn:16F0384ED693DEFF48B71B73D5740E05

Research output: Contribution to journalArticleScientificpeer-review

Life-Cycle Economics of Rentable Prefabricated School Facility Units in Municipal Real Estate Procurement

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Real estate development, Research group: Service Life Engineering of Structures, School of Architecture
Contributors: Vihola, J., Edelman, H.
Number of pages: 12
Pages: 76-87
Publication date: 27 May 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016: Volume V : Advancing Products and Services
Publisher: Tampere University of Technology. Department of Civil Engineering
ISBN (Electronic): 978-952-15-3745-5
Keywords: Prefabricated spatial units, public real estate procurement, school facilities, municipal economics, life-cycle economics
Electronic versions: 
URLs: 

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

High-power 1550 nm tapered DBR lasers fabricated using soft UV-nanoimprint lithography

Paper reports the DBR-RWG surface grating design, the fabrication process, and the output characteristics of tapered DBR laser diodes for the applications, like for example LIDAR and range finding, that require eye-safe high-power single-mode coherent light sources. The fabricated regrowth-free DBR AlGaInAs/InP lasers exhibited a CW output power as high as 560 mW in single-mode operation at room temperature. At maximum output power the SMSR was 38 dB, proving the excellent behavior of the surface gratings. The tapered section enabled scaling the maximum CW power at room temperature from 125 mW to 560 mW, by increasing its length from 0.5 mm to 4.0 mm. The paper discusses the limitations and performance variation associated to the power scaling by using the tapered section length as a scaling parameter.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Nanophotonics, Research group: Semiconductor Technology and Applications, Materials Research Laboratory, Turun Yliopisto/Turun Biomateriaalikeskus
Contributors: Viheriälä, J., Aho, A. T., Mäkelä, J., Salmi, J., Virtanen, H., Leinonen, T., Dumitrescu, M., Guina, M.
Number of pages: 7
Publication date: 2016

Host publication information

Title of host publication: High-Power Diode Laser Technology and Applications XIV
Publisher: SPIE
Article number: 97330Q
ISBN (Electronic): 9781628419689

Publication series

Name: SPIE Conference Proceedings
Publisher: SPIE
Volume: 9733
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: 1550 nm laser diode, DBR, Power scaling, Tapered laser diode

Bibliographical note

INT=orc,"Aho, Antti T."
JUFOID=71479

Source: Scopus
Source ID: 84978785955

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

1180 nm GaInNAs quantum well based high power DBR laser diodes

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

General information

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

Host publication information

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

Publication series

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

Bibliographical note

INT=fot,"Koskinen, Mervi"

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

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

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

General information

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

Host publication information

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

Publication series

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

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85065404814

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

Electrostatic Threats in Hospital Environment

Uncontrolled electrostatic discharge (ESD) sources may cause unpleasant experiences as well as more serious hazards to health. We have observed surprisingly high energy ESD sources in the hospital environment. These findings are analyzed and discussed in this article. In addition, electrostatic attraction and charge relaxation of materials for medical purposes are studied and solutions are proposed.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Cascade Metrol, Kanta Hame Cent Hosp, Premix Oy, Ion PhasE, Electrostat Solut Ltd
Contributors: Viheriäkoski, T., Kokkonen, M., Tamminen, P., Karja, E., Hillberg, J., Smallwood, J.
Number of pages: 9
Publication date: 2014

Host publication information

Title of host publication: 2014 36TH Electrical overstress/electrostatic discharge symposium (EOS/ESD)
Publisher: IEEE COMPUTER SOC

Publication series

Name: Electrical Overstress Electrostatic Discharge Symposium
Publisher: IEEE COMPUTER SOC
ISSN (Print): 0739-5159
Source: WOS
Source ID: 000355792800054

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

Benchmarking of Factory Level ESD Control

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

General information

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

Host publication information

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

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

Uncertainties in Charge Measurements of ESD Risk Assessment

Charge measurement techniques are often considered too complicate to the process control of electronics manufacturing. In his study, we show that expensive instrumentation is not necessarily needed for characterizing ESD source parameters in a risk assessment. Measurement can be made accurately when uncertainties are properly taken into account.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, ABB Oy, Drives, Cascade Metrology, Nokia Corporation
Contributors: Viheriäkoski, T., Kohtamäki, J., Peltoniemi, T., Tamminen, P.
Number of pages: 8
Publication date: 27 Sep 2015

Host publication information

Title of host publication: Electrical Overstress / Electrostatic Discharge Symposium Proceedings 2015
Volume: 2015
Place of publication: USA
Publisher: IEEE COMPUTER SOC
Article number: 6B.3
ISBN (Print): 9781479988952
ASJC Scopus subject areas: Engineering(all)
Keywords: ESD, charge, measurement, Uncertainty estimation
Electronic versions: 

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

Charge relaxation of slowly dissipative polymers

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

General information

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

Host publication information

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

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

Electrostatic discharge characteristics of conductive polymers

ESD control items are generally characterized by direct current measurements at certain voltage levels. Discharge resistance may, however, have a remarkable voltage and frequency dependency. We have assessed conductive polymers by comparing the resistivities of the solid planar objects with the resistances of electrostatic discharges. Conductive polymers may have applicable characteristics of current attenuation for ESD control items.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Cascade Metrology, Premix Oy, Infenion Technologies AG
Contributors: Viheriäkoski, T., Kärjä, E., Gärtner, R., Tamminen, P.
Publication date: 18 Oct 2017

Host publication information

Title of host publication: Electrical Overstress/Electrostatic Discharge Symposium Proceedings 2017, EOS/ESD 2017
Publisher: ESD Association
ISBN (Electronic): 1585372935
ASJC Scopus subject areas: Electrical and Electronic Engineering
Source: Scopus
Source ID: 85037810021

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

Qualification challenges of footwear and flooring systems

Measurement of body voltage alone can result in erroneous conclusions in qualification of footwear and flooring systems in combination with a person. Measurement uncertainties should be taken into account. We have studied the time dependency and charge generation of some footwear and flooring systems. The most significant inconsistencies of the voltage measurement are discussed in this technical paper.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Faculty of Biomedical Sciences and Engineering, Cascade Metrology, Sievin Jalkine Oy, Electrostatic Solutions Ltd., Armeka Engineering
Contributors: Viheriäkoski, T., Jokinen, V., Smallwood, J., Korpipää, A., Tamminen, P.
Publication date: 18 Oct 2017

Host publication information

Title of host publication: Electrical Overstress/Electrostatic Discharge Symposium Proceedings 2017, EOS/ESD 2017
Publisher: ESD Association
ISBN (Electronic): 1585372935
ASJC Scopus subject areas: Electrical and Electronic Engineering
Source: Scopus
Source ID: 85037814104

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

Probabilistic Mapping of Human Visual Attention from Head Pose Estimation

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Automation and Hydraulic Engineering, Aalto University School of Electrical Engineering
Contributors: Veronese, A., Racca, M., Pieters, R., Kyrki, V.
Number of pages: 11
Publication date: 30 Oct 2017
Peer-reviewed: Yes

Publication information

Journal: Frontiers in Robotics and AI
Article number: 53
ISSN (Print): 2296-9144
Ratings: 
  • Scopus rating (2017): SNIP 1.479
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Model-Driven Development of Control Applications: On Modeling Tools, Simulations and Safety

Control systems are required in various industrial applications varying from individual machines to manufacturing plants and enterprises. Software applications have an important role as an implementation technology in such systems, which can be based on Distributed Control System (DCS) or Programmable Control System (PLC) platforms, for example. Control applications are computer programs that, with control system hardware, perform control tasks. Control applications are efficient and flexible by nature; however, their development is a complex task that requires the collaboration of experts and information from various domains of expertise.

This thesis studies the use of Model-Driven Development (MDD) techniques in control application development. MDD is a software development methodology in which models are used as primary engineering artefacts and processed with both manual work and automated model transformations. The objective of the thesis is to explore whether or not control application development can benefit from MDD and selected technologies enabled by it. The research methodology followed in the thesis is the constructive approach of design science.

To answer the research questions, tools are developed for modeling and developing control applications using UML Automation Profile (UML AP) in a model-driven development process. The modeling approach is developed based on open source tools on Eclipse platform. In the approach, modeling concepts are kept extendable. Models can be processed with model transformation techniques that plug in to the tool. The approach takes into account domain requirements related to, for example, re-use of design. According to assessment of industrial applicability of the approach and tools as part of it, they could be used for developing industrial DCS based control applications.

Simulation approaches that can be used in conjunction to model-driven development of control applications are presented and compared. Development of a model-in-the-loop simulation support is rationalized to enable the use of simulations early while taking into account the special characteristics of the domain. A simulator integration is developed that transforms UML AP control application models to Modelica Modeling Language (ModelicaML) models, thus enabling closed-loop simulations with ModelicaML models of plants to be controlled. The simulation approach is applied successfully in simulations of machinery applications and process industry processes.

Model-driven development of safety applications, which are parts of safety systems, would require taking into account safety standard requirements related to modeling techniques and documentation, for example. Related to this aspect, the thesis focuses on extending the information content of models with aspects that are required for safety applications. The modeling of hazards and their associated risks is supported with fault tree notation. The risk and hazard information is integrated into the development process in order to improve traceability. Automated functions enable generating documentation and performing consistency checks related to the use of standard solutions, for example. When applicable, techniques and notations, such as logic diagrams, have been chosen so that they are intuitive to developers but also comply with recommendations of safety standards.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Automation Science and Engineering, Research area: Information Systems in Automation
Contributors: Vepsäläinen, T.
Number of pages: 115
Publication date: 5 Jun 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3528-4
ISBN (Electronic): 978-952-15-3536-9
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1303
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

A computationally feasible optimization approach to inverse SAR translational motion compensation

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

General information

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

Host publication information

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

Bibliographical note

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

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

Nano-structured optical fibers made of glass-ceramics, and phase separated and metallic particle-containing glasses

For years, scientists have been looking for different techniques to make glasses perfect: fully amorphous and ideally homogeneous. Meanwhile, recent advances in the development of particle-containing glasses (PCG), defined in this paper as glass-ceramics, glasses doped with metallic nanoparticles, and phase-separated glasses show that these "imperfect" glasses can result in better optical materials if particles of desired chemistry, size, and shape are present in the glass. It has been shown that PCGs can be used for the fabrication of nanostructured fibers-a novel class of media for fiber optics. These unique optical fibers are able to outperform their traditional glass counterparts in terms of available emission spectral range, quantum effciency, non-linear properties, fabricated sensors sensitivity, and other parameters. Being rather special, nanostructured fibers require new, unconventional solutions on the materials used, fabrication, and characterization techniques, limiting the use of these novel materials. This work overviews practical aspects and progress in the fabrication and characterization methods of the particle-containing glasses with particular attention to nanostructured fibers made of these materials. A review of the recent achievements shows that current technologies allow producing high-optical quality PCG-fibers of different types, and the unique optical properties of these nanostructured fibers make them prospective for applications in lasers, optical communications, medicine, lighting, and other areas of science and industry.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Physics, Research group: Photonics Glasses, Université Côte d'Azur, Ecole Centrale de Nantes, PSL Research University
Contributors: Veber, A., Lu, Z., Vermillac, M., Pigeonneau, F., Blanc, W., Petit, L.
Number of pages: 29
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Fibers
Volume: 7
Issue number: 12
ISSN (Print): 2079-6439
Ratings: 
  • Scopus rating (2019): CiteScore 2.7 SJR 0.442 SNIP 1.036
Original language: English
ASJC Scopus subject areas: Ceramics and Composites, Civil and Structural Engineering, Biomaterials, Mechanics of Materials
Keywords: Fabrication, Glass, Glass-ceramics, Metallic nanoparticles, Optical fibers, Optical properties, Phase-separation
Electronic versions: 
Source: Scopus
Source ID: 85076893292

Research output: Contribution to journalReview ArticleScientificpeer-review

Effects of adiabatic heating estimated from tensile tests with continuous heating

The mechanical behavior of metastable austenitic stainless steels is strongly influenced by the strain induced phase transformation of austenite into martensite. The phase transformation rate is significantly affected by the strain rate and by the adiabatic heating at higher strain rates. Uncoupling of the effects of strain rate and adiabatic heating can lead to a better understanding of the strain-induced martensitic transformation and allow more accurate material modeling. This paper presents a preliminary analysis of the effects of adiabatic heating during a tensile test. The adiabatic heating as a function of strain was calculated from the stress-strain curves obtained in adiabatic conditions. Then the tensile tests were carried out at a lower strain rate while continuously heating the specimen at the same rate as obtained in the adiabatic conditions. With this method, the thermal conditions of the adiabatic tests were reproduced in the low rate conditions, which would normally be isothermal without the external heating. The martensite fraction was evaluated using the magnetic balance method. In this paper, we present a detailed description of the experimental procedure and discuss the observed changes in the mechanical behavior and microstructure of the studied steel.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, Research group: Materials Characterization
Contributors: Vazquez Fernandez, N., Isakov, M., Hokka, M., Kuokkala, V. T.
Number of pages: 7
Pages: 1-7
Publication date: 2018

Host publication information

Title of host publication: Dynamic Behavior of Materials - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
Volume: 1
Publisher: Springer New York LLC
ISBN (Print): 9783319629551

Publication series

Name: Conference Proceedings of the Society for Experimental Mechanics
ISSN (Print): 2191-5644
ASJC Scopus subject areas: Engineering(all), Computational Mechanics, Mechanical Engineering
Keywords: Adiabatic heating, Magnetic balance method, Martensite transformation, Metastable austenite, Stainless steel

Bibliographical note

jufoid=72540

Source: Scopus
Source ID: 85033464703

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

The Role of Customer Experience in Value Creation in Business-to-Business Context

The Role of Customer Experience in Value Creation in Business-to-Business Context

General information

Publication status: Unpublished
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Information Management and Logistics, Research group: Novi, Tampere University of Technology, Tampere University of Applied Science
Contributors: Väyrynen, H., Vasell, T., Helander, N., Boedeker, M., Andersson, T.
Number of pages: 1
Pages: 146
Publication date: 12 Aug 2015

Host publication information

Title of host publication: 23rd Nordic Academy of Management Conference : NFF 2015
Publisher: Nordic Academy of Management
Article number: 24.02

Bibliographical note

AUX=tlo,"Vasell, Tytti"

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

Knowledge Management Practices in Large Companies

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Information Management and Logistics, Research group: Novi, University of Vaasa
Contributors: Väyrynen, H., Helander, N., Kukko, M.
Number of pages: 17
Pages: 56-72
Publication date: 2014
Peer-reviewed: Yes
Early online date: 2014

Publication information

Journal: The Macrotheme Review
Volume: 3
Issue number: 9
Article number: 3(9)
ISSN (Print): 1848-4735
Original language: English
Keywords: Knowledge Management, practices, survey, large companies

Bibliographical note

Versio ok 20.4.2016 /KK
EXT="Helander, Nina"

Research output: Contribution to journalArticleScientificpeer-review

Data-Driven Approach for Analysis of Performance Indices in Mobile Work Machines

This paper presents a data-driven approach for the analysis of performance indices in mobile work machines. Performance analysis and optimisation of mobile work machines has become increasingly important in recent years. The mobile work machine optimisation is performed based on performance measurements. One of the most interesting and potential approach for improving the quality of the performance analysis is the utilisation of Big Data and data-driven analysis methods, such as machine learning. This study utilises a machine learning algorithm, Classification and Regression Trees (CART), in the performance analysis of the mobile work machines. The most significant benefit of the presented method is that it provides a statistical reference of the machine performance for the operators. The method enables operators to compare performance against reference fleet of machines working in similar operating conditions. This feature can lead to more informative and reliable interpretations and analysis of the performance values. The results of this paper demonstrate how the presented method was used to analyse the performance of a mobile work machine fleet.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Dynamic Systems, Research area: Measurement Technology and Process Control, Tampere University of Technology
Contributors: Väyrynen, T., Peltokangas, S., Anttila, E., Vilkko, M.
Number of pages: 7
Pages: 81-86
Publication date: 19 Jul 2015

Host publication information

Title of host publication: DATA ANALYTICS 2015, The Fourth International Conference on Data Analytics
Editors: Klemas, T., Chan, S.
ISBN (Electronic): 978-1-61208-423-7

Bibliographical note

AUX=ase,"Anttila, Eero"

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

Knowledge Management operationalization – how it differs in large enterprises and SMEs in Finland

Information and knowledge are essential resources for businesses to maintain their competitiveness and to constantly develop further. Knowledge Management (KM) enables companies to develop their activities by having the right information at the right time, as well as by offering the tools to manage the skills and knowledge of the personnel. The aim of this paper is to empirically analyze how KM is operationalized in large and small and medium sized companies in Finland, and furthermore, what kinds of challenges the companies face in KM operationalization. The empirical study was carried out in spring 2014 as a web-based questionnaire survey and structured interviews. Results of the study provide direction for the development directions of KM in Finnish companies.

General information

Publication status: Unpublished
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Information Management and Logistics, Research group: Novi
Contributors: Väyrynen, H., Helander, N.
Number of pages: 27
Pages: 1-27
Publication date: Aug 2015

Host publication information

Title of host publication: 23rd Nordic Academy of Management Conference : NFF 2015
Publisher: Nordic Academy of Management
Keywords: Knowledge Management, survey, large and small and medium sized companies

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

Why don't one maximizes database utilization in product and service development in manufacturing?

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Business Ecosystems, Networks and Innovations
Contributors: Väyrynen, H., Manu, M.
Number of pages: 13
Pages: 93-105
Publication date: 7 Jun 2017

Host publication information

Title of host publication: Proceedings of the 12th International Forum on Knowledge Asset Dynamics 2017 : St. Petersburg, Russia, 7-9 June 2017
Place of publication: St. Petersburg, Russia
ISBN (Print): 978-88-96687-10-9

Publication series

Name: Proceedings IFKAD
ISSN (Print): 2280-787X
Keywords: Technology adoption, DATABASE, customer oriented approach, Practice, Development

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

Parameters Affecting the Upcycling of Waste Cotton and PES/CO Textiles

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Fibre Materials
Contributors: Vats, S., Rissanen, M.
Number of pages: 12
Pages: 166-177
Publication date: 30 May 2016
Peer-reviewed: Yes

Publication information

Journal: Recycling
Volume: 1
Issue number: 1
ISSN (Print): 2313-4321
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Identifying and measuring customer value - case multi-locational worker

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 Civil Engineering
Contributors: Vasell, T., Vuolle, M., Petrulaitiene, V., Nenonen, S., Jylhä, T.
Number of pages: 9
Pages: 143-151
Publication date: 2016

Host publication information

Title of host publication: Research papers for EuroFM's 15th research symposium at EFMC2016 : 8-9 June 2016 in Milan, Italy
Publisher: EuroFM
Editors: Nielsen, S., Jensen, P. A.
ISBN (Electronic): 9788750211020
Keywords: facility management, Value co-creation, Customer experience, customer value measuring
Source: Bibtex
Source ID: urn:3e8ad9e3f5cee371d9024be9db9d287f

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

Balancing Expectations to the Health Software Production Process Standard

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

General information

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

Host publication information

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

Publication series

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

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

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

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

General information

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

Host publication information

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

Publication series

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

Research output: Chapter in Book/Report/Conference proceedingChapterScientific

Betonin kosteusteknisten materiaaliominaisuuksien määrittäminen

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Laboratory of Civil Engineering
Contributors: Vänttinen, K., Tuominen, E., Vinha, J.
Number of pages: 10
Pages: 461-470
Publication date: 24 Oct 2017

Host publication information

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

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.

Bibliographical note

INT=RAK, "Vänttinen, Kari"

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

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

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

General information

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

Host publication information

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

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

Customers’ conscious experience in a coffee shop

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Vanharanta, H., Kantola, J., Seikola, S.
Number of pages: 8
Pages: 618-625
Publication date: 2015

Host publication information

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

Publication series

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

Bibliographical note

EXT="Kantola, Jussi"

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

Proactive vision for strategy making

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Vanharanta, H., Kantola, J.
Number of pages: 8
Pages: 587-594
Publication date: 2015

Host publication information

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

Publication series

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

Bibliographical note

EXT="Kantola, Jussi"

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

Utilizing knowledge networks in virtual or augmented reality solution creation

Contemporary digital transformation brings new opportunities for companies, lately especially in the form of virtual and augmented reality solutions (VR/AR). While the technologies are developing fast, knowledge about them and their possibilities is difficult to locate and reach. Cross-organizational knowledge networks that share knowledge about technology and its applications are needed. This paper analyzes cross-organizational knowledge sharing networks that operate behind the scenes of virtual and augmented reality. To understand the knowledge networking processes, this paper presents a case study of a regional VR/AR community. The aim of the paper is to understand how knowledge sharing networks naturally operate in the VR/AR context and what kind of processes and tools organizations harness. The paper presents a description on how the interviewed organizations and individuals utilize their knowledge network in VR/AR knowledge acquisition and creation. The distinct characteristics of the VR/AR field are discussed in light of existing literature on knowledge sharing and knowledge networks. In the findings, the need for a more systematic way of utilizing the network is identified. Knowledge networks provide the best value for their members when the network is actively harnessed, and there are network actors who focus on systematically spreading knowledge across the network. While the case study shows that the network members feel that they gain knowledge from the network, the use of the network varies between organizations and individuals. The network shows signs of movement toward more systematic knowledge sharing, and the knowledge network literature suggests that this development will improve the benefits of network participation for all actors in the network. Further studies on a larger scale in similar types of networks are suggested to allow better understanding of knowledge sharing in knowledge networks, and the challenges and benefits that are connected to it. VR/AR development as a rapidly evolving field lends itself to be an interesting context for studying knowledge networks.

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, Pervasive Computing, Research area: User experience, Tampere University of Technology
Contributors: Vanhalakka, J., Ilvonen, I., Väätäjä, H.
Number of pages: 7
Pages: 1008-1014
Publication date: 2017

Host publication information

Title of host publication: Proceedings of the 18th European Conference on knowledge Management ECKM 2017 : 7-8 September 2017, Barcelona, Spain
Publisher: Academic Conferences and Publishing International
Editors: Marimon, F., Mas-Machuca, M., Berbegal-Mirabent, J., Bastida, R.
ISBN (Print): 978-1-911218-48-7
ISBN (Electronic): 978-1-911218-49-4

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

Hard Rock (- ei Hallelujah, vaan) Tribology: Pohjoismainen kaivosteollisuuden kulumisongelmiin keskittyvä kurssi ja seminaari Tampereella

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Materials Science, Research group: Materials Characterization
Contributors: Valtonen, K., Tiainen, T.
Pages: 30-33
Publication date: 2 Sep 2015
Peer-reviewed: Unknown

Publication information

Journal: Materia
Volume: 2015
Issue number: 1
ISSN (Print): 1459-9694
Original language: Finnish

Research output: Contribution to journalArticleProfessional

MathCheck: a tool for checking math solutions in detail

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: Valmari, A., Kaarakka, T.
Publication date: Sep 2016

Host publication information

Title of host publication: SEFI 2016 Annual Conference Proceedings : Engineering Education on Top of the World: Industry University Cooperation
Publisher: European Society for Engineering Education SEFI
ISBN (Print): 9782873520144

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

The logics taught and used at high schools are not the same

Typical treatises on propositional and predicate logic do not tell how to deal with undefined expressions, such as division by zero. However, there seems to be a sound (albeit inexplicit) reasoning system that addresses undefined expressions, because equations and inequations involving them are routinely solved in schools and universities without running into fundamental inconsistencies. In this study we discover this school logic and formalize its semantics. The need to do so arose when developing software that gives students feedback on every reasoning step of their solution, instead of just telling whether the roots that they finally report are the correct roots. The problem of undefined expressions has been addressed in computer science. However, school logic proves different from those approaches. School logic is based on a Kleene-style third “undefined” truth value and the treatment of “⇒” and “⇔” not as propositional operators but as reasoning operators.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing, University of Tampere
Contributors: Valmari, A., Hella, L.
Number of pages: 15
Pages: 172-186
Publication date: May 2017

Host publication information

Title of host publication: Proceedings of the Fourth Russian Finnish Symposium on Discrete Mathematics
Place of publication: Turku
Publisher: TURKU CENTRE FOR COMPUTER SCIENCE
Editors: Karhumäki, J., Matiyasevich, Y., Saarela, A.
ISBN (Print): 978-952-12-3547-4

Publication series

Name: TUCS Lecture Notes
Publisher: Turku Centre for Computer Science
No.: 26
ISSN (Print): 1797-8823
ASJC Scopus subject areas: Mathematics(all)
Keywords: logic

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

DCASE 2016 Acoustic Scene Classification Using Convolutional Neural Networks

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Audio research group
Contributors: Valenti, M., Diment, A., Parascandolo, G., Squartini, S., Virtanen, T.
Publication date: 1 Sep 2016

Host publication information

Title of host publication: Proceedings of the Detection and Classification of Acoustic Scenes and Events 2016 Workshop (DCASE2016)
Publisher: Tampere University of Technology. Department of Signal Processing
ISBN (Electronic): 978-952-15-3807-0
Keywords: Acoustic scene classification, convolutional neural networks, DCASE, computational audio processing
Source: Bibtex
Source ID: urn:c2fdc060aad74381513299d25e4a3052

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

Implementation Experiences and Design Challenges for Resilient SDN Based Secure WAN Overlays

Mobile computing devices, industrial control systems, and service provider clouds often need to be connected to each other over wide area networks. However, reliability, quality of services and confidentiality are challenging in such setups. Moreover, isolated appliances and physical equipment face harsh environment conditions. In this paper we explore designing secure layer 2 overlay networks using Software Defined Networking (SDN), and challenges in implementing them with open source tools.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: Information security
Contributors: Vajaranta, M., Kannisto, J., Harju, J.
Number of pages: 7
Pages: 17-23
Publication date: 4 Aug 2016

Host publication information

Title of host publication: 2016 11th Asia Joint Conference on Information Security (AsiaJCIS)
Publisher: IEEE
ISBN (Electronic): 978-1-5090-2285-4

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

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

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

General information

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

Host publication information

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

Publication series

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

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

Enhancing the acceptance of advanced services among users of complex systems

Purpose: In order to succeed in servitization, manufacturing firms need to understand the mechanisms through which their customers accept advanced services. This research explores the customers’ readiness towards more advanced services. The goal is increased knowledge on the aspects that manufacturers need to consider when bringing advanced services into market and ways to enhance the customer acceptance of these services.
Design/methodology/approach: A qualitative case study design is used, to analyse readiness for advanced services and service acceptance in a manufacturer’s three customer firms. Interview data were collected among 14 persons at the different customer sites and were content analysed.
Findings: The results show that customers accustomed to purchasing basic services or implementing them in-house may not yet be ready to purchase advanced services from manufacturers. Customers are uncertain about the benefits and the complete costs of the service. Manufacturers can enhance the customers’ acceptance of advanced services by certain activities within the organisation and in relation to the customers e.g. by training service employees and educating the customers.
Originality/value: The results offer new knowledge on customer service acceptance in a business-to-business context and, thereby, complement previous studies on the supplier perspective to servitization and service acceptance in consumer business. The contributions help manufacturers to identify practices for enhancing the customer firms’ readiness and acceptance of advanced services.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Center for Research on Operations Projects and Services
Contributors: Vaittinen, E., Martinsuo, M., Nenonen, S.
Number of pages: 9
Pages: 162-170
Publication date: May 2016

Host publication information

Title of host publication: Servitization: Shift, Transform, Grow : Proceedings of the Spring Servitization Conference, 16-17 May 2016 (SSC2016)
Editors: Baines, T., Harrison, D., Zolkiewski, J.
ISBN (Print): 978-185-44-9403-0

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

Ready to sell? Requirements for promoting service selling in a manufacturing firm

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: Vaittinen, E., Martinsuo, M.
Number of pages: 9
Pages: 26-34
Publication date: May 2018

Host publication information

Title of host publication: Proceedings of the Spring Servitization Conference, DrivingCompetitiveness through Servitization, 14-16 May 2018
Publisher: Aston University
Editors: Bigdeli, A., Frandsen, T., Raja, J., Baines, T.
ISBN (Print): 9781854494481

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

Cross-Cultural Design of Mobile Mathematics Learning Service for South African Schools

In the era of mobile devices and services, researchers in the educational domain have been interested in how to support learning with mobile technology in both local and global contexts. Recent human-computer interaction (HCI) research in the educational domain has particularly focused on how to develop mobile learning services and how to evaluate the learning outcomes. However, learning occurs in a local cultural context and the impact of culturally sensitive issues of the design of mobile learning needs more attention. We studied mobile mathematics learning -service in a longitudinal research with over 30 South African schools during three years. Our aim was to understand culturally dependent issues which need to be taken into consideration in the design of mobile learning services. We found subjective and objective culturally dependent issues in the content, context, infrastructure and technology of mobile learning and therefore, subjects to cross-cultural research. In conclusion, we argue that localization enhances the user experience and therefore support learning.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Pervasive Computing, Research area: User experience, University of Tampere
Contributors: Vainio, T., Walsh, T., Varsaluoma, J.
Number of pages: 12
Pages: 81-93
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: IADIS International Journal on WWW/Internet
Volume: 12
Issue number: 1
ISSN (Print): 1645-7641
Original language: English
Keywords: Cross-Cultural Design, Mobile Learning, Cultural Context, Subjective and Objective Culture

Bibliographical note

EXT="Vainio, Teija"

Research output: Contribution to journalArticleScientificpeer-review

Learning maths with mobiles: Cross-cultural design of technology with experiences in South-Africa and Finland

This chapter presents an overview of our experiences on cross-cultural design of technology in the context of mobile learning focusing on supporting learners to study mathematics in two different countries. The aim of our study is to discuss design issues from the perspective of two different types of cultures and reflect culturally sensitive issues based on a longitudinal study, which included empirical data from altogether over 3500 learners of grades 9 and 10. As a result we outline two focus areas: content and concept for best design practices. Furthermore, we argue that cross-cultural design of technology can help to identify culturally sensitive areas such as attitudes towards informal and collaborative learning and recognizing the local context for the content. Cross-cultural design of technology supports development of good user experience of mobile learning services for different local learning contexts.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Pervasive Computing, Research area: User experience
Contributors: Vainio, T., Walsh, T.
Number of pages: 18
Pages: 79-96
Publication date: 13 Jul 2015

Host publication information

Title of host publication: Integrating Touch-Enabled and Mobile Devices into Contemporary Mathematics Education
Publisher: IGI Global
ISBN (Print): 9781466687158
ISBN (Electronic): 9781466687141
ASJC Scopus subject areas: Social Sciences(all)

Bibliographical note

EXT="Vainio, Teija"

Source: Scopus
Source ID: 84957956201

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

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

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

General information

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

Host publication information

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

Publication series

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

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

Learning Maths with mobiles: Cross-cultural design of technology with experiences in South-Africa and Finland

This chapter presents an overview of our experiences on cross-cultural design of technology in the context of mobile learning focusing on supporting learners to study mathematics in two different countries. The aim of our study is to discuss design issues from the perspective of two different types of cultures and reflect culturally sensitive issues based on a longitudinal study, which included empirical data from altogether over 3500 learners of grades 9 and 10. As a result we outline two focus areas: content and concept for best design practices. Furthermore, we argue that cross-cultural design of technology can help to identify culturally sensitive areas such as attitudes towards informal and collaborative learning and recognizing the local context for the content. Cross-cultural design of technology supports development of good user experience of mobile learning services for different local learning contexts.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Pervasive Computing
Contributors: Vainio, T., Walsh, T.
Number of pages: 19
Pages: 741-759
Publication date: 18 Aug 2016

Host publication information

Title of host publication: Blended Learning: Concepts, Methodologies, Tools, and Applications
Volume: 4
Publisher: IGI Global
ISBN (Print): 9781522507833
ISBN (Electronic): 9781522507840
ASJC Scopus subject areas: Social Sciences(all), Computer Science(all)

Bibliographical note

EXT="Vainio, Teija"

Source: Scopus
Source ID: 85016852656

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

Characterizing the Context of Use in Mobile Work

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

General information

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

Host publication information

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

Publication series

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

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

Integrating mobile orienteering to team forming activity in a software engineering course

One of the most important skills software engineers need when entering work life is working in teams, including communicating, collaborating, as well as coordinating work in a team. This paper presents a team building activity aiming to support the first phases of team formation with a mobile orienteering activity. Created tasks at orienteering checkpoints were related to communication, collaboration and work division. Students were enthusiastic about the activity and expressed in their group reports on the activity that it supported the team building activity well, helped break the ice and supported agreeing the ways of working. Students also liked getting out of the classroom. The approach seems promising and we will investigate in the future similar type of activities in the first phases of team formation as well as will explore further integrating physical activity to the exercise sessions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: User experience
Contributors: Väätäjä, H., Ahtinen, A.
Publication date: Sep 2016

Host publication information

Title of host publication: SEFI 2016 Annual Conference Proceedings : Engineering Education on Top of the World: Industry University Cooperation
Publisher: European Society for Engineering Education SEFI
ISBN (Electronic): 9782873520144
Keywords: soft skills, engineering skills, collaboration, Team working, group forming, mobile orienteering, team forming

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

Dual-Mode Behavior in Multi-Section DFB Semiconductor Lasers with Laterally-Coupled Ridge-Waveguide Surface Gratings

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, Research group: Nanophotonics
Contributors: Uusitalo, T., Virtanen, H., Viheriälä, J., Salmi, J. O., Aho, A., Dumitrescu, M.
Publication date: Jun 2015

Host publication information

Title of host publication: The European Conference on Lasers and Electro-Optics 2015
Publisher: OSA - The Optical Society
Article number: CB_P_26
ISBN (Electronic): 978-1-4673-7475-0

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

Difference frequency modulation of multi-section dual-mode lasers with nanoscale surface gratings

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications, Research group: Nanophotonics, Facilities and Infrastructure
Contributors: Uusitalo, T., Virtanen, H., Viheriälä, J., Salmi, J., Aho, A. T., Dumitrescu, M.
Number of pages: 9
Publication date: 7 Mar 2016

Host publication information

Title of host publication: SPIE Proceedings : Novel In-Plane Semiconductor Lasers XV
Volume: 9767
Publisher: SPIE
Editors: Belyanin, A. A., Smowton, P. M.
Article number: 97670S

Publication series

Name: Proceedings of SPIE
ISSN (Electronic): 0277-786X
Keywords: Frequency modulation, lasers, Nanotechnology, Modulation, Nanoimprint lithography, Quantum dots, terahertz radiation, ultraviolet radiation, distributed feedback laser diodes

Bibliographical note

INT=orc,"Aho, Antti T."
JUFOID=71479

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

Transverse structure optimization of laterally-coupled ridge waveguide DFB lasers

A new figure of merit for single transverse mode operation and an accurate procedure for calculating the coupling coefficient in distributed feedback lasers with laterally-coupled ridge waveguide surface grating structures are introduced. Based on the difference in optical confinement between the pumped and un-pumped regions in the transverse plane, the single transverse mode figure of merit is effective and easy to calculate, while the improved coupling coefficient calculation procedure gives experimentally confirmed better results than the standard calculation approaches.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications
Contributors: Uusitalo, T., Virtanen, H., Dumitrescu, M.
Number of pages: 2
Pages: 79-80
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
Article number: 7547038
ISBN (Electronic): 9781467386036
ASJC Scopus subject areas: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Modelling and Simulation, Numerical Analysis
Source: Scopus
Source ID: 84987653468

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

Review on mobility as a service in scientific literature

Our current private car based transport system is inefficient and unsustainable. The Mobility as a Service (MaaS) model is offering a solution by combining public and private transport modes and aiming to provide seamless trips over one interface. This study summarises the current state of the art of MaaS research by analysing scientific research papers. Overall, 16 MaaS-related documents in Scopus and ScienceDirect databases were recognised as relevant for this study. The relevant literature was divided into three groups according to the topics of the studies. The most significant observations are presented based on the
literature and future research needs are discussed. Currently, there are relatively few MaaS-related scientific studies published, but the issue is topical as most of the relevant studies were published in 2016 or 2017. This study helps the MaaS stakeholders and the scientific community to recognize the current state of the art and where to focus in future.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Civil Engineering
Contributors: Utriainen, R., Pöllänen, M.
Number of pages: 15
Pages: 141-155
Publication date: 2017

Host publication information

Title of host publication: Conference Proceedings 1st International Conference on Mobility as a Service : ICoMaaS, Tampere 28.-29.11.2017
Publisher: Tampere University of Technology
Article number: 15

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

Green picosecond narrow-linewidth tapered fiber laser system

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Physics, Computing Sciences, Research group: Nanophotonics, Ampliconyx Oy
Contributors: Ustimchik, V., Fedotov, A., Rissanen, J., Noronen, T., Gumenyuk, R., Chamorovskii, Y., Filippov, V.
Pages: 246 - 251
Publication date: 2020

Host publication information

Title of host publication: Fiber Lasers XVII: Technology and Systems
Publisher: SPIE
Editor: Dong, L.

Publication series

Name: Proceedings of SPIE
Volume: 11260
ISSN (Print): 0277-786X
Keywords: Green laser, High peak power, Picosecond, Narrow linewidth, frequency doubling, MOPA, linear-polarized, singlemode tapered PM fiber

Bibliographical note

jufoid=71479
EXT="Noronen, T."
EXT="Filippov, V."

Source: Bibtex
Source ID: 10.1117/12.2546003

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

Evaluation of Median Root Prior for Robust In-Beam PET Reconstruction

Dose delivery verification in proton beam radiotherapy is used to ensure the delivery of the dose to the correct location. A positron emission tomography (PET) scanner can be used to detect the secondary radiation during the treatment, so-called in-beam PET. This is a challenging application for PET due to the low counts and limited angular coverage. We propose a maximum a posteriori (MAP) reconstruction with median root prior (MRP) for the reconstruction of in-beam PET data. The proposed method was compared against MAP with total variation (TV) prior and maximum likelihood expectation maximization (MLEM), which have previously been used for this application. The effects of different ring configurations and time-of-flight information were tested with simulations of a geometrical phantom and a realistic patient treatment plan. The results indicate that both MAP methods produced sharper edges than MLEM, allowing more accurate edge localization in the reconstructed images. Even for the partial ring configurations, no elongation was observed with MAP methods. MAP-MRP successfully reduced the noise, whereas MAP-TV resulted in checkerboard artifacts. MAP-MRP was also more stable against the selection of the reconstruction parameters. In conclusion, MAP-MRP offers a simple and robust alternative for the reconstruction of in-beam PET data.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Mathematics, Signal Processing, Research group: M2oBSI, University of Groningen
Contributors: Us, D., Brzezinski, K., Buitenhuis, T., Dendooven, P., Ruotsalainen, U.
Number of pages: 8
Pages: 490-498
Publication date: 5 Sep 2018
Peer-reviewed: Yes

Publication information

Journal: IEEE Transactions on Radiation and Plasma Medical Sciences
Volume: 2
Issue number: 5
ISSN (Print): 2469-7303
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Laser Scanning Tasks of Building Refurbishment Project

Laser scanning is quickly becoming a common and beneficial tool in the field of civil engineering. In refurbishment projects, fast data capture, millions of measurement points and high accuracy have marked laser scanners out from conventional measurements as a data acquisition method. By using laser scanning and point clouds in refurbishment projects multiple benefits could be achieved: reduction of mistakes in the design phase and on the building site, more realistic visualizations of existing buildings, and savings in time and costs. The utility of laser scanning and point clouds surfaces especially when renovating old complex buildings without accurate construction drawings, documents or measurements.

However, the process of the procurement of laser scanning is generally unclear and there is very little standardization and regulation in the matter. The roles and assignments of every party in the process are obscure and the lack of knowledge about the use and the limits and the benefits of laser scanning in a building project can reduce clients’ interest toward laser scanning.
This paper presents the different kinds of refurbishment project types where laser scanning has been used in Finland. The study represents the benefits, limits and challenges concerning laser scanning faced in these projects. The results of the study are based on the interviews of the organizations with experience in laser scanning in refurbishment projects. The study reveals that laser scanning is considered a valid and accurate method for data acquisition in refurbishment projects and it has been used also for visualization, piecework, quantity surveying and detail measuring and observing. However, there have been challenges especially with laser scanning operations in buildings in use, on the technical determination of laser scanning and during and after the process from a point cloud into an inventory model.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Civil Engineering, Research group: Responsible Construction
Contributors: Uotila, U., Saari, A., Junnonen, J.
Publication date: 2018

Host publication information

Title of host publication: Proceendings of the 17th International Conference on Computing in Civil and Building Engineering (ICCCBE)
ISBN (Print): 978-951-758-632-0

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

Nanocellulose as a Piezoelectric Material

Cellulose-based nanomaterials, which are generally known as nanocelluloses, are interesting renewable biomaterials which have potential applications for example in material science, electronics and biomedical engineering and diagnostics. Cellulose has a strong ability to form lightweight, highly porous and entangled networks that make nanocellulose suitable as substrate or membrane material. Recently, also studies related to piezoelectric behavior of nanocellulose have been published. The piezoelectricity of wood was proposed already in 1955 by Eiichi Fukada, but only very slightly studied since then. Here, we show the experimental evidence of significant piezoelectric activity of different types of nanocellulose films. Wood-based cellulose nanofibril (CNF) and cellulose nanocrystals (CNC) films, and bacterial nanocellulose (BC) films have been studied. The recent results suggest that nanocellulose is a potential bio-based piezoelectric sensor material.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Faculty of Biomedical Sciences and Engineering, Nokia Technologies
Contributors: Tuukkanen, S., Rajala, S.
Number of pages: 14
Pages: 1-14
Publication date: 29 Aug 2018

Host publication information

Title of host publication: Piezoelectricity - Organic and Inorganic Materials and Applications
Publisher: InTech Open Access Publisher
ISBN (Electronic): 978-953-51-6209-4

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

Infinitesimals and Pavelka logic

Rational Pavelka Logic does not admit infinitesimals. We argue that infinitesimals are important in logic and we present an alternative approach which admits them. It is built up in a similar style, but based on the Chang's perfect MV-algebra. We prove a partial result towards the completeness of this logic. We also discuss a combined approach using more complex perfect MV-algebras.

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, Czech Tech Univ, Czech Technical University Prague
Contributors: Turunen, E., Navara, M.
Number of pages: 7
Pages: 1027-1033
Publication date: 2015

Host publication information

Title of host publication: PROCEEDINGS OF THE 2015 CONFERENCE OF THE INTERNATIONAL FUZZY SYSTEMS ASSOCIATION AND THE EUROPEAN SOCIETY FOR FUZZY LOGIC AND TECHNOLOGY
Place of publication: PARIS
Publisher: Atlantis Press
Editors: Alonso, J., Bustince, H., Reformat, M.
ISBN (Electronic): 978-94-62520-77-6

Publication series

Name: Advances in Intelligent Systems Research
Publisher: ATLANTIS PRESS
Volume: 89
ISSN (Print): 1951-6851
Keywords: Mathematical fuzzy logic, Rational Pavelka Logic, Lukasiewicz operations, MV-algebra, perfect MV-algebra, Chang's MV-algebra, FUZZY LOGIC, PROPOSITIONAL CALCULI, TRUTH-CONSTANTS, COMPLETENESS
Source: WOS
Source ID: 000358581100145

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

Tunable nonlinear effects through focused spatially phase-shaped beams

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, Aalto University
Contributors: Turquet, L., Bautista, G., Karvonen, L., Dhaka, V., Chen, Y., Jiang, H., Huhtio, T., Lipsanen, H., Kauranen, M.
Publication date: 2015

Host publication information

Title of host publication: European Quantum Electronics Conference 2015
Publisher: Optical Society of America
Article number: EG_P_11
ISBN (Electronic): 978-1-4673-7475-0
Keywords: Nonlinear optics, SPATIAL LIGHT-MODULATOR, MICROSCOPY, beam shaping

Bibliographical note

EXT="Dhaka, V."
EXT="Chen, Y."

Source: Bibtex
Source ID: urn:3623590cd14102e9789109aea5912da4

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

Tunable second-harmonic generation in a single nanostructure

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Physics, Research area: Optics, Research group: Nonlinear Optics, Department of Micro- and Nanosciences, Aalto University, Aalto University, Department of Applied Physics and Nanomicroscopy Center
Contributors: Turquet, L., Bautista, G., Kakko, J., Karvonen, L., Dhaka, V., Chen, Y., Jiang, H., Huhtio, T., Lipsanen, H., Kauranen, M.
Number of pages: 2
Publication date: 2015

Host publication information

Title of host publication: The Eleventh Finland-Japan Joint Symposium on Optics in Engineering

Bibliographical note

ISBN kysytty, HO.

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

Use of high-order beams to calibrate spatial light modulators for microscopy

We present here a technique based on high-order laser beams to quickly calibrate phase-only SLMs for microscopy. This method uses the microscopy setup itself and therefore no extra setups or alignment are required.

General information

Publication status: Published
Organisations: Department of Physics, Research area: Optics, Research group: Nonlinear Optics
Contributors: Turquet, L., Kauranen, M., Bautista, G.
Number of pages: 1
Publication date: 2016
Peer-reviewed: Unknown
Event: 

Research output: Other conference contributionPaper, poster or abstractScientific

Laastien vedenimukertoimen määrittämisen virhelähdekokeet

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering
Contributors: Tuominen, E., Vinha, J.
Number of pages: 6
Pages: 239-244
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,"Tuominen, Eero"

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

Kapillaaristen vedenimuominaisuuksien määrittämiseen sopivan vapaan vedenimukoelaitteiston kehittäminen

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Tuominen, E., Vinha, J.
Number of pages: 6
Pages: 233-238
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,"Tuominen, Eero"

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

Suomessa markkinoilla olevien kalsiumsilikaattilevyjen rakennusfysikaaliset materiaaliominaisuudet


General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Laboratory of Civil Engineering
Contributors: Tuominen, E., Vainio, M., Vinha, J.
Number of pages: 6
Pages: 455-460
Publication date: 24 Oct 2017

Host publication information

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

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.

Bibliographical note

INT=rak,"Vainio, Maarit"

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

Behavior of capacitive humidity sensors in monitoring the drying of concrete walls

This research examines the behavior of capacitive humidity sensors in monitoring the drying of concrete walls in continuous measurements in laboratory conditions. Tests are carried out using continuous measuring of moisture with different capacitive sensors in concrete structures varied with three different types of thermal insulation materials. Sensors are sealed in plastic tubes that were preinstalled into the casting molds. Three borehole measurements are carried out as reference during the research. Results show differences in performance between the examined humidity sensors from two different manufacturers. The main difference is related to stability as sensors from the other manufacturer prove to be more prone to error. The study affirms that measuring humidity in concrete is challenging even when using high-quality humidity sensors.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Building Physics
Contributors: Tuominen, E., Vinha, J., Raunima, T.
Number of pages: 6
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: MATEC Web of Conferences
Volume: 282
Article number: 02053
ISSN (Print): 2274-7214
Ratings: 
  • Scopus rating (2019): CiteScore 0.8 SJR 0.166 SNIP 0.714
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering
Electronic versions: 

Bibliographical note

INT=ceng,"Raunima, Tuomas"

Research output: Contribution to journalConference articleScientificpeer-review

Calculation method to determine capillary properties of building materials with automatic free water intake test

The water absorption coefficient and capillary saturation water content are common building physical material properties. This paper presents a calculation method to determine these values with an automated free water intake test arrangement. Buoyancy affects weighing results in the automatic measurement and it is recommended to take these factors into account when deriving the real water intake of a specimen. A new mathematical method is presented and trial experiments have been conducted. The method is proven to work with the polymer modified plaster, concrete, autoclaved aerated concrete and lightweight aggregate concrete, which represent materials from both extremes of capillary activity. The functionality and advantages of the test arrangement for both low and high suction materials are presented.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Building Physics
Contributors: Tuominen, E., Vinha, J.
Number of pages: 6
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: MATEC Web of Conferences
Volume: 282
Article number: 02037
ISSN (Print): 2274-7214
Ratings: 
  • Scopus rating (2019): CiteScore 0.8 SJR 0.166 SNIP 0.714
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering
Electronic versions: 

Research output: Contribution to journalConference articleScientificpeer-review

Thermal and moisture properties of calcium silicate insulation boards

The purpose of this research was to determine thermal and moisture properties of calcium silicate insulation boards available on the Finnish market. Ruggedness testing and test arrangement development were done related to the pressure plate test, which was used to measure desorption isotherms in capillary range. Four calcium silicate and one calcium hydroxide board were examined. The determined material properties are water vapour permeability, water absorption coefficient, capillary saturation water content, moisture sorption isotherm in hygroscopic and capillary range, thermal conductivity and specific heat capacity. Ruggedness tests and development were done to the pressure plate measurement method. Capacitance needles were tested as a method to evaluate the state of equilibrium and different vacuum saturation methods were tested.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Building Physics
Contributors: Tuominen, E., Tuominen, O., Vainio, M., Ruuska, T., Vinha, J.
Number of pages: 7
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: MATEC Web of Conferences
Volume: 282
Article number: 02065
ISSN (Print): 2274-7214
Ratings: 
  • Scopus rating (2019): CiteScore 0.8 SJR 0.166 SNIP 0.714
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering
Electronic versions: 

Bibliographical note

INT=ceng,"Tuominen, Olli"
INT=ceng,"Vainio, Maarit"

Research output: Contribution to journalConference articleScientificpeer-review

International Workshop on MicroFactories (IWMF 2012): 17th-20th June 2012 Tampere Hall Tampere, Finland

This Workshop provides a forum for researchers and practitioners in industry working on the diverse issues of micro and desktop factories, as well as technologies and processes applicable for micro and desktop factories. Micro and desktop factories decrease the need of factory floor space, and reduce energy consumption and improve material and resource utilization thus strongly supporting the new sustainable manufacturing paradigm. They can be seen also as a proper solution to point-of-need manufacturing of customized and personalized products near the point of need.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Mechanical Engineering and Industrial Systems
Contributors: Tuokko, R. (ed.), Lanz, M. (ed.), Luostarinen, P. (ed.)
Number of pages: 186
Publication date: 2012

Publication information

Publisher: Tampere University of Technology. Department of Production Engineering
ISBN (Electronic): 978-952-15-2936-8
Original language: English

Bibliographical note

Versio ok 16.12.2015

Research output: Book/ReportCommissioned reportProfessional

MYSTERY SHOPPERS RECOGNISING KNOWLEDGE SHARING BARRIERS IN HIGHER EDUCATION

This study focuses on the knowledge sharing barriers in the space between learning and teaching in higher education as reported by mystery shoppers. There is surprisingly little context-specific research on learning and teaching in a knowledge intensive community like a university from the perspective of knowledge management (KM). Discussing learning and teaching within KM is based on considering students controversially as customers or stakeholders. Thus including them more meaningfully in assessing and developing teaching practices, or knowledge flow, seems justified. The specific aim of this paper is to first recognise possible knowledge sharing barriers and then categorize such barriers emerging from the material into three larger domains, namely, individual barriers, technological barriers and organisational barriers.
There were 45 students from all faculties participating in a mystery shopper project in a Finnish university of technology. They observed their learning experience for six weeks in order to supplement data from other sources, to add a student voice on the process of developing learning and teaching in higher education.
The research approach represents qualitative content analysis in which knowledge-sharing barriers were recognised from the qualitative mystery shopper data. The results identify teaching practises that contribute to creating knowledge sharing barriers. More detailed and almost real-time contextual activity sampling is suggested as a method for further study and also an avenue for instant feedback for teaching staff. The results will provide data on current knowledge practices and learning processes in a technical university in Finland.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Language Centre, Department of Information Management and Logistics, Research group: Novi, University of Tampere
Contributors: Tukiainen, M., Helander, N., Mäkinen, M.
Publication date: 16 Nov 2015

Host publication information

Title of host publication: ICERI2015 Proceedings : 8th annual International Conference of Education, Research and Innovation Seville (Spain). 16th - 18th of November, 2015.
ISBN (Electronic): 978-84-608-2657-6

Bibliographical note

ORG=kie,0.5
ORG=tlo,0.5

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

University Students’ Perceptions of Academic Writing: An Academic Literacies Perspective

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Language Centre, Department of Information Management and Logistics, Research group: Novi, University of Tampere
Contributors: Tukiainen, M., Mäkinen, M., Helander, N.
Number of pages: 7
Pages: 7589-7595
Publication date: 16 Nov 2015

Host publication information

Title of host publication: ICERI2015 Proceedings : 8th annual International Conference of Education, Research and Innovation Seville (Spain). 16th - 18th of November, 2015.
ISBN (Electronic): 978-84-608-2657-6

Bibliographical note

ORG=kie,0.5
ORG=tlo,0.5

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

High efficiency dilute nitride solar cells: Simulations meet experiments

Parameter extraction procedure and simulation of dilute nitride solar cells are reported. Using PC1D simulation and fitting to experimental current-voltage and external quantum efficiency data, we retrieve the phenomenological material parameters for GaInNAs solar cells. Based on these, we have constructed a model that can explain the changes in short circuit current and open circuit voltage of n-i-p solar cells subjected to rapid thermal annealing. The model reveals that non-annealed MBE-grown GaInNAs material has an n-type doping that evolves to p-type upon rapid thermal annealing. The change of doping type and the shift of the physical location of the pn-junction were confirmed by Kelvin-probe force microscopy. The PC1D modelling was found to work well also for GaInNAs p-i-n solar cells with opposite polarity. It was also found that the GaInNAs lower doping levels in p-i-n solar cells grown at lowered As/III flux ratios were associated with increased carrier lifetimes.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Optoelectronics Research Centre, Research group: Semiconductor Technology and Applications
Contributors: Tukiainen, A., Aho, A., Polojärvi, V., Ahorinta, R., Guina, M.
Number of pages: 20
Pages: 113-132
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Journal of Green Engineering
Volume: 5
Issue number: 3-4
Article number: 8
ISSN (Print): 1904-4720
Ratings: 
  • Scopus rating (2016): CiteScore 0.7 SJR 0.132 SNIP 0.294
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Energy(all), Physics and Astronomy(all), Materials Science(all)
Source: Scopus
Source ID: 84983050025

Research output: Contribution to journalArticleScientificpeer-review

Students as mystery shoppers: lowering knowledge sharing barriers in higher education

This empirical research paper focuses on discussing potential knowledge sharing barriers volunteering students as mystery shoppers perceived in the context of higher education. More specifically, the focus is on students’ ideas on finding solutions to lowering individual knowledge sharing barriers, i.e. improving the quality of their instruction.
Mystery shopping is a method of observing service performance from the user, or customer, perspective and it has been widely used to evaluate the overall service quality within service businesses. Using empirical data from students volunteering as mystery shoppers appears not as a widely used research and development tool.
Moreover, there is little context-specific research on learning and teaching in such a knowledge intensive community like a university from the perspective of knowledge management (KM). KM offers thus a useful approach for analysing learning and teaching, as well as improving the processes of knowledge creation.
A Finnish technical university and its student union organised a mystery shopping project with 45 student participants. They observed their learning experiences for six weeks in order to complement data from other sources. The students kept a casual theme-based diary on four larger topics: teaching staff and teaching (including pedagogical competence and teaching culture, instruction and guidance, course arrangements), students and the learning culture, student services and learning environment. The initial goal of the project was to add a student voice on the processes of developing learning and teaching in higher education.
The research approach represents qualitative content analysis in which knowledge-sharing barriers were first recognised from the qualitative mystery shopper data. Next those instances where the students offered their solution to lowering that barrier were selected for further analysis. The results identify learner suggestions that may contribute to lowering knowledge sharing barriers. Result also indicate that individual knowledge sharing barriers as described in the literature appear to be valid in a higher education setting.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Language Centre
Contributors: Tukiainen, M. O.
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 (Electronic): 978-2-87352-012-0

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

Hydrodynamic Classification of Natural Flows Using an Artificial Lateral Line and Frequency Domain Features

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Vision, Tallinn University of Technology, Tallinn, Estonia
Contributors: Tuhtan, J., Strokina, N., Toming, G., Muhammad, N., Kruusmaa, M., Kämäräinen, J.
Publication date: 2015

Host publication information

Title of host publication: 36th IAHR World Congress
ISBN (Electronic): 978-90-824846-0-1

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

Experimenting traditional and modern reliability models in a 3-years european software project

Reliability is a very important non-functional aspect for software systems and artefacts. In literature, several definitions of software reliability exist and several methods and approaches exist to measure reliability of a software project. However, in the literature no works focus on the applicability of these methods in all the development phases of real software projects. In this paper, we describe the methodology we adopted during the S-CASE FP7 European Project to predict reliability for both the S-CASE platform as well as for the software artefacts automatically generated by using the S-CASE platform. Two approaches have been adopted to compute reliability: The first one is the Rome Lab Model, a well adopted traditional approach in industry; the second one is an empirical approach defined by the authors in a previous work. An extensive dataset of results has been collected during all the phases of the project. The two approaches can complement each other, to support to prediction of reliability during all the development phases of a software system in order to facilitate the project management from a non-functional point-of-view.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Università degli Studi Dell'Insubria, Former organisation of the author
Contributors: Tosi, D., Lenarduzzi, V., Morasca, S., Taibi, D.
Number of pages: 11
Pages: 304-314
Publication date: 2017

Host publication information

Title of host publication: Proceedings of the 11th European Conference on Information Systems Management, ECISM 2017
Publisher: Academic Conferences and Publishing International Limited
ISBN (Electronic): 9781911218524
ASJC Scopus subject areas: Computer Science Applications, Information Systems, Management Information Systems
Keywords: Early Reliability, Perceived Reliability, Predictive Models, Reliability by design, Rome Lab Model, Static Analysis
Source: Scopus
Source ID: 85039850001

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

Sub-parts-per-trillion sensitivity in trace gas detection by cantilever-enhanced photo-acoustic spectroscopy

We report a simple cantilever-enhanced photoacoustic detector, which reaches exceptionally good sensitivity in trace gas detection of hydrogen fluoride by using a highly stable narrow-linewidth optical parametric oscillator at 2.476 μm.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, University of Helsinki, Gasera Ltd.
Contributors: Tomberg, T., Vainio, M., Hieta, T., Halonen, L.
Publication date: 2018

Host publication information

Title of host publication: CLEO : Applications and Technology, CLEO_AT 2018
Publisher: OSA - The Optical Society
ISBN (Electronic): 9781557528209
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Mechanics of Materials
Source: Scopus
Source ID: 85049146097

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

Lean manufacturing methods in simulation literature: Review and association analysis

The lean manufacturing philosophy includes several methods that aim to remove waste from production. This paper studies lean manufacturing methods and how simulation is used to consider them. In order to do this, it reviews papers that study simulation together with lean methods. The papers that are reviewed are categorized according to the lean methods used and result types obtained. Analysis is performed in order to gain knowledge about the volumes of occurrence of different methods and result types. Typical methods in the papers are different types of value stream mapping and work-in-process models. An exploratory analysis is performed to reveal the relationships between the methods and result types. This is done using association analysis. It reveals the methods that are commonly studied together in the literature. The paper also lists research areas that are not considered in the literature. These areas are often related to the analysis of variation.

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, Aalto University, Department of Engineering Design and Production
Contributors: Tokola, H., Niemi, E., Väistö, V.
Number of pages: 10
Pages: 2239-2248
Publication date: 16 Feb 2016

Host publication information

Title of host publication: 2015 Winter Simulation Conference (WSC)
ISBN (Print): 978-1-4673-9743-8
ASJC Scopus subject areas: Software, Modelling and Simulation, Computer Science Applications

Bibliographical note

EXT="Niemi, Esko"

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

Calcium signaling in astrocytes: modeling Fura-2AM measurements

General information

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

Publication information

Journal: Frontiers in Neuroscience
ISSN (Print): 1662-4548
Ratings: 
  • Scopus rating (2010): SJR 1.347 SNIP 0.694
Original language: English

Research output: Contribution to journalMeeting AbstractScientificpeer-review

Dynamics of rogue wave and soliton emergence in spontaneous modulation instability

Numerical simulations of spontaneous modulation instability show that localized structures in the chaotic instability field are well-described by analytic elementary and higher order soliton on finite background solutions of the nonlinear Schrödinger equation.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Physics, Frontier Photonics, The University of Auckland, University College Dublin, Ireland, Christina Thorpe, Université de Franche-Comté, Institut FEMTO-ST, School of Mathematical Sciences, University College Dublin
Contributors: Toenger, S., Godin, T., Billet, C., Dias, F., Erkintalo, M., Genty, G., Dudley, J. M.
Number of pages: 2
Publication date: 4 May 2015

Host publication information

Title of host publication: CLEO: QELS - Fundamental Science, CLEO_QELS 2015
Publisher: Optical Society of America (OSA)
ISBN (Print): 9781557529688
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
Source: Scopus
Source ID: 84935059381

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

Breathers Emergence in Spontaneous Modulation Instability

General information

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

Host publication information

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

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

Intensity Interferometry of Supercontinuum Light

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Photonics, Tampere University of Technology
Contributors: Toenger, S., Ahvenjärvi, J., Ryczkowski, P., Genty, G.
Publication date: Jun 2018

Host publication information

Title of host publication: Trends in Electromagnetic Coherence
Place of publication: Joensuu
Publisher: University of Eastern Finland
Editors: Setälä, T., Turunen, J., T. Friberg, A., Saastamoinen, K.
ISBN (Print): 978-952-61-2817-7

Publication series

Name: Publications of the University of Eastern Finland. Reports and studies in forestry and natural sciences
No.: 32
ISSN (Print): 1798-5684
Keywords: interferometric autocorrelation, Two-photon absorption, supercontinuum

Bibliographical note

jufoid=71333

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

Dynamics of value in technology inspired value co-creation: Case in homecare value network

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial Engineering and Management, Research group: Cost Management Center
Contributors: Tiitola, V., Korhonen, T., Laine, T., Lyly-Yrjänäinen, J.
Publication date: 2019

Host publication information

Title of host publication: 14th IFKAD 2019 Proceedings : 5-7 June 2019, Matera, Italy
Publisher: IKAM Centro Studi & Ricerche
ISBN (Electronic): 978-88-96687-12-3

Publication series

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

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

Intracavity double diode structures with GaInP barrier layers for thermophotonic cooling

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Photonics, Research group: Semiconductor Technology and Applications, Research group: Ultrafast and intense lasers
Contributors: Tiira, J., Radevici, I., Haggren, T., Hakkarainen, T., Kivisaari, P., Lyytikäinen, J., Aho, A., Tukiainen, A., Guina, M., Oksanen, J.
Publication date: 17 Feb 2017

Host publication information

Title of host publication: Proc. SPIE 10121 : Optical and Electronic Cooling of Solids II
Volume: 10121
Publisher: SPIE
Article number: 1012109
ISBN (Electronic): 9781510606838

Publication series

Name: Proceedings of SPIE
Volume: 10121
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X

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

Finite temperature path-integral modeling of quantum dot cellular automata

General information

Publication status: Published
Organisations: Department of Physics, Research group: Semiconductor Technology and Applications, Optoelectronics Research Centre, Research area: Computational Physics, Research group: Electronic Structure Theory
Contributors: Tiihonen, J., Schramm, A., Kylänpää, I., Rantala, T.
Publication date: 29 Mar 2016
Peer-reviewed: Unknown
Event: Paper presented at PHYSICS DAYS / FYSIIKAN PÄIVÄT : ANNUAL MEETING OF THE FINNISH PHYSICAL SOCIETY, .

Research output: Other conference contributionPaper, poster or abstractScientific

Optimization of high strength steel tubular trusses

General information

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

Host publication information

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

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

Teräsristikon paarteiden liitoksen vapaan välin leikkausvoiman arviointi

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Metal and Light-wight structures
Contributors: Tiainen, T., Heinisuo, M.
Number of pages: 6
Pages: 30-35
Publication date: 2015

Host publication information

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

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleGeneral public

Energiatehokkuus rakennusalan ammattityövoiman täydennyskoulutuksessa

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Teriö, O., Sorri, J.
Number of pages: 6
Pages: 97-102
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

Moisture and building processes in Finland

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Teriö, O., Hämäläinen, J., Uotila, U., Sorri, J., Saari, A.
Number of pages: 11
Pages: 907-917
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 20th CIB World Building Congress 2016: Volume I - Creating built environments of new opportunities. (Tampere University of Technology. Department of Civil Engineering. Construction Management and Economics. Report; Vol. 18).
Volume: I
Place of publication: Tampere
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Kähkönen, K., Keinänen, M.
ISBN (Electronic): 978-952-15-3741-7
Keywords: construction site, drying, energy, heating, moisture

Bibliographical note

INT=ark,"Hämäläinen, Jari"

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

Puukerrostalorakentamisen kosteudenhallinta

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES, Research group: Building Physics, Tampere University of Technology, Laboratory of Civil Engineering
Contributors: Teriö, O., Penttilä, O., Laukkarinen, A., Musakka, S., Vinha, J.
Number of pages: 6
Pages: 173-178
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

Bibliographical note

INT=rak,"Penttilä, Olavi"
INT=rak,"Musakka, Sami"

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

Management accounting and new service development under servitization: literature review and case studies

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Cost Management Center, Scuola Superiore Sant'Anna, Istituto di Management, Pisa, Italy
Contributors: Tenucci, A., Laine, T.
Publication date: 15 Jun 2016

Host publication information

Title of host publication: Proceedings of the Manufacturing Accounting Research Conference 2016 : Lisbon, Portugal, June 15-17, 2016

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

Detection and Assessment of Sleep-Disordered Breathing with Special Interest of Prolonged Partial Obstruction

Sleep-disordered breathing (SDB) has become more common and puts more strain on public health services than ever before. Obstructive sleep apnea (OSA) and its health consequences such as different cardiovascular diseases are nowadays well recognized. In addition to OSA, attention has recently been paid to another SDB; prolonged partial obstruction. However, it is often undiagnosed and easily left untreated because of the low number of respiratory events during polysomnography recording. This patient group has found to present with more atypical subjective symptoms than OSA patients.

Polysomnography (PSG) is considered to be the gold standard in reference methods in SDB diagnostics. PSG is a demanding and laborious multichannel recording method and often requires subjects to spend one night in a sleep laboratory. There is long tradition in Finland to use mattress sensors in SDB diagnostics. Recently, smaller electromechanical film transducer (Emfit) mattresses have replaced the old Static Charge-Sensitive Bed (SCSB) mattresses. However, a proper clinical validation of Emfit mattresses in SDB diagnostics has not been carried out.

In this work, the use of Emfit recording in the detection of sleep apneas, hypopneas, and prolonged partial obstruction with increased respiratory effort was evaluated. The general aim of the thesis is to develop and improve the diagnostic methods for sleep-related breathing disorders.

Comparisons with both PSG with nasal pressure recording and transesophageal pressure were made. Special attention was paid to the existence of the spiking phenomenon in the Emfit mattress in relation to changes in negative intrathoracic pressure in estimating increased respiratory effort. This entails monitoring the esophageal pressure as a part of nocturnal polysomnography. The recording method is demanding and uncomfortable and is usually not used with ordinary sleep laboratory patients. Thus, reliable and easy indirect quantification methods for respiratory effort are needed in clinical work. According to the results presented in this work, the Emfit signal reveals increased respiratory effort as well as apneas/hypopneas.

To find out the prevalence and consequences of prolonged partial obstruction among sleep laboratory patients was another aim of this thesis. This was done by retrospective analyses of sleep laboratory patients from one year. The prevalence of patients with prolonged partial obstruction was 11%. They were as sleepy as OSA patients, but their life quality was worse, as assessed by a survey. These results, along with the findings of the heart rate variation evaluation carried out in this thesis, suggest that prolonged partial obstruction and OSA should be considered as different entities of SDB.

With the Emfit mattress sensor, the SDB types can be differentiated, which is expected to enhance the accuracy of diagnostics. However, there is increasing need for easy and cheap screening methods to evaluate nocturnal breathing. In this respect, the usability of compressed tracheal sound signal scoring in SDB screening was estimated. The method reveals apneas and hypopneas but, according to the present findings, it can also be used in the detection of prolonged partial obstruction. The findings encourage the use of compressed tracheal sound analysis in screening different SDB.

The analysis of sleep recordings is still based on a doctor’s subjective and visual estimation. To date, no generally accepted and sufficiently reliable automatic analysis method exists. Robust, automatic quantification methods with easier techniques for non-invasive sleep recording would enable the analysis methods to be also used for screening purposes. In this technology-orientated world, people could take much more responsibility and take care of themselves better by following their own biosignals and by changing their health habits earlier. The need for good sleep as a necessity for good life and health is widely recognized.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Electronics and Communications Engineering
Contributors: Tenhunen, M.
Number of pages: 77
Publication date: 4 Sep 2015

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3531-4
ISBN (Electronic): 978-952-15-3556-7
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1304
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Arkinen liikkuminen kontekstina kaupunkitilan tarkasteluun

General information

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

Publication information

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

Research output: Contribution to journalSpecial issueScientific

Beaconing in a highway scenario: Vulnerable vehicles problem

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

General information

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

Host publication information

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

Bibliographical note

INT=elt"Tariq, Ali Bin"

Source: Scopus
Source ID: 85044729916

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

Turvallisuuden johtajat - Esimiesten johtajuus, osaaminen ja sitoutuminen

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: Tappura, S., Hyytinen, T., Kivistö-Rahnasto, J., Nenonen, N., Vasara, J.
Number of pages: 144
Publication date: 30 Dec 2015

Publication information

Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto; Tampereen yliopisto
ISBN (Electronic): 978-952-15-3662-5
Original language: Finnish

Research output: Book/ReportCommissioned reportProfessional

How to support managers’ commitment to safety management and leadership in organizations: good practices from the managers’ viewpoint

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Safety Management and Engineering
Contributors: Tappura, S., Nenonen, N., Kivistö-Rahnasto, J.
Publication date: Sep 2015

Host publication information

Title of host publication: WOS 8th international conference - Book of Abstracts
ISBN (Print): 978-989-98203-5-7

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

On the threshold based neuronal spike detection, and an objective criterion for setting the threshold

In this paper, we investigate the workings of threshold (TH) based spike detection for neuronal extracellular field potential spikes. Thresholding is the most used spike detection method. In general, it is employed by setting the TH as per convention and without considering either the undetected or spurious spikes. In this paper, we provide insight in to the workings of thresholding, and proposed a new objective way to set the TH based on spike count histogram analysis. We illustrate the method with 2D and 3D simulations and analysis of measured data.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Computational Biophysics and Imaging Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), BioMediTech
Contributors: Tanskanen, J. M. A., Kapucu, F. E., Hyttinen, J. A. K.
Number of pages: 4
Pages: 1016-1019
Publication date: 1 Jul 2015

Host publication information

Title of host publication: International IEEE/EMBS Conference on Neural Engineering, NER
Publisher: IEEE COMPUTER SOCIETY PRESS
ISBN (Print): 9781467363891
ASJC Scopus subject areas: Artificial Intelligence, Mechanical Engineering
Source: Scopus
Source ID: 84940384726

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

Development of Si neural probe module with adjustable gain amplifier for neuronal signal recording

In recent years, lots of research on biomedical technologies directly using bio-signals such as BMI (Brain Machine Interface) have been performed intensively. Among bio-signals, ECoG (Electrocorticogram), LFP (Local Field Potential), and AP (Action Potential) are usually recorded especially for diagnosis, treatment, and prevention of brain diseases. These bio-signals have different amplitudes and frequency bandwidths, and the signal intensities vary accordingly with recording electrode conditions and individual variation. Therefore, a multiple bio-signals recording system having adjustable gain and bandwidth is strongly required. In this study, we designed the adjustable gain amplifier appropriate for the system, and fabricated the module composed of the amplifier and a Si neural probe for the multiple bio-signal recording in the deep brain. Additionally, we verified fundamental functions of the module by in vitro experiments.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Biomaterials and Tissue Engineering Group, Research group: Computational Biophysics and Imaging Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), Graduate School of Engineering, Electrical and Electronics Engineering Department, Department of Bioengineering and Robotics, Tohoku University, Nagasaki Institute of Applied Science
Contributors: Tani, T., Naganuma, H., Harashima, T., Iwagami, T., Kino, H., Kiyoyama, K., Kellomäki, M., Hyttinen, J., Tanaka, T.
Pages: O-377-O-378
Publication date: 17 Aug 2014
Peer-reviewed: Yes

Publication information

Journal: Transactions of Japanese Society for Medical and Biological Engineering
Volume: 52
ISSN (Print): 1347-443X
Ratings: 
  • Scopus rating (2014): CiteScore 0.1 SJR 0.127 SNIP 0.038
Original language: English
ASJC Scopus subject areas: Biomedical Engineering
Keywords: Adjustable gain amplifier, Multiple bio-signal recording, Si neural probe
Source: Scopus
Source ID: 84939449061

Research output: Contribution to journalArticleScientificpeer-review

Effect of elevated nitrate and sulfate concentrations on selenate removal by mesophilic anaerobic granular sludge bed reactors

Simultaneous removal of selenate (SeO42-), nitrate (NO3-) and sulfate (SO42-), typically present in Se-contaminated wastewaters, by Eerbeek anaerobic granular sludge, was investigated in batch and continuous bioreactor experiments. Batch experiments showed that SeO42- removal was enhanced to 91% in simulated wastewater with SeO42- + NO3- + SO42- (1 : 40 : 100 SeO42- : NO3- : SO42- molar ratios) compared to simulated wastewater with SeO42- alone (67%). SeO42- removal was severely impacted by high concentrations of SO42- (SeO42- : SO42- > 1 : 300). Removal of SeO42-, NO3- and SO42- at a 1 : 40 : 100 ratio was studied in a 2 L lab-scale upflow anaerobic sludge blanket (UASB) reactor operated at 20 [degree]C, a 24 h hydraulic retention time and a 2 g COD L-1 day-1 organic loading rate using lactate as the electron donor. The removal efficiencies were stabilized at 100, 30 and 80% for NO3-, SO42- and total Se, respectively, during 92 days of UASB operation. The total Se removal efficiencies dropped to 47% or even to a negative value when, respectively, SO42- and NO3- were sequentially excluded from the influent. Speciation of Se, particularly the microbial production of colloidal Se0 levels, was influenced by both SO42- and NO3-. The results presented here demonstrate that UASB reactors are capable of removing SeO42- in the presence of millimolar concentrations of NO3- and SO42- typically found in Se-contaminated wastewaters.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, UNESCO-IHE Institute for Water Education
Contributors: Tan, L. C., Nancharaiah, Y. V., van Hullebusch, E. D., Lens, P. N. L.
Pages: 303-314
Publication date: 2018
Peer-reviewed: Yes
Early online date: 5 Dec 2017

Publication information

Journal: Environmental Science: Water Research & Technology
Volume: 4
Issue number: 2
ISSN (Print): 2053-1400
Ratings: 
  • Scopus rating (2018): CiteScore 5.3 SJR 1.104 SNIP 1.081
Original language: English
Source: Bibtex
Source ID: urn:83b997c5e222c3328f8a2e876e3d3da8

Research output: Contribution to journalArticleScientificpeer-review

Field Collapse Event ESD Test Method

A novel field collapse event ESD test method is presented in this paper. The device under test is continuously grounded in an electrostatic field and when the field is removed it drives current through the device. We show with measurements and simulations how to use this method to test ESD immunity of electronic products.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Sensing Systems for Wireless Medicine (MediSense), Department of Electronics and Communications Engineering, Research group: Wireless Identification and Sensing Systems Research Group, Cascade Metrol, Microsoft
Contributors: Tamminen, P., Viheriäkoski, T., Reinvuo, T., Sydänheimo, L., Ukkonen, L.
Number of pages: 6
Publication date: 2014

Host publication information

Title of host publication: 2014 36TH Electrical overstress/electrostatic discharge symposium (EOS/ESD)
Publisher: IEEE COMPUTER SOC

Publication series

Name: Electrical Overstress Electrostatic Discharge Symposium
Publisher: IEEE COMPUTER SOC
ISSN (Print): 0739-5159
Source: WOS
Source ID: 000355792800014

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

ESD Sensitivity of 01005 Chip Resistors and Capacitors

Miniaturization of passive surface mount components has decreased the package size down to 01005. These tiny components are ESD sensitive and can get ESD damages on a system board. In this paper ESD sensitivities of 01005 chip resistors and capacitors are studied on a system board.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Sensing Systems for Wireless Medicine (MediSense), Department of Electronics and Communications Engineering, Research group: Wireless Identification and Sensing Systems Research Group
Contributors: Tamminen, P., Sydänheimo, L., Ukkonen, L.
Number of pages: 9
Publication date: 2014

Host publication information

Title of host publication: 2014 36TH Electrical Overstress/Electrostatic Discharge Symposium (EOS/ESD)
Publisher: IEEE COMPUTER SOC

Publication series

Name: Electrical Overstress Electrostatic Discharge Symposium
Publisher: IEEE COMPUTER SOC
ISSN (Print): 0739-5159
Source: WOS
Source ID: 000355792800042

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

The effect of USB ground cable and product dynamic capacitance on IEC61000-4-2 qualification

EC61000-4-2 discharge stress levels are studied with varying product capacitance and ground connections. Stress levels are evaluated based on the measured and simulated peak current, peak power, pulse rise time, and energy transfer along to the USB cable. These stress parameters can be significantly affected by adjusting the test setup.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Sensing Systems for Wireless Medicine (MediSense), Department of Electronics and Communications Engineering, Research group: Wireless Identification and Sensing Systems Research Group
Contributors: Tamminen, P., Ukkonen, L., Sydänheimo, L.
Number of pages: 10
Publication date: 27 Sep 2015

Host publication information

Title of host publication: Electrical Overstress / Electrostatic Discharge Symposium Proceedings 2015
Volume: 2015
Place of publication: USA
Publisher: IEEE COMPUTER SOC
Article number: 7B.2
ISBN (Print): 9781479988952
ASJC Scopus subject areas: Engineering(all)
Keywords: USB, IEC61000-4-2, ESD, EMC, cable
Electronic versions: 

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

ESD and Disturbance Cases in Electrostatic Protected Areas

Electrostatic protected area (EPA) can effectively prevent ESD failures from charged operators, work benches and tools. However, electrical disturbances and ESD events from other sources can still exist in well-built EPAs. In this paper failures found in electronic assembly environments are analyzed to improve coverage of ESD control programs.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Sensing Systems for Wireless Medicine (MediSense), Department of Electronics and Communications Engineering, Research group: Wireless Identification and Sensing Systems Research Group, Cascade Metrology
Contributors: Tamminen, P., Viheriäkoski, T., Ukkonen, L., Sydänheimo, L.
Number of pages: 7
Publication date: 27 Sep 2015

Host publication information

Title of host publication: Electrical Overstress / Electrostatic Discharge Symposium Proceedings 2015
Volume: 2015
Place of publication: USA
Publisher: IEEE COMPUTER SOC
Article number: 5B.2
ISBN (Print): 9781479988952
ASJC Scopus subject areas: Engineering(all)
Keywords: EPA, ESD, DISTURBANCES, EMI, failure
Electronic versions: 

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

Charged cable-system ESD event

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

General information

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

Host publication information

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

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

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

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

General information

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

Host publication information

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

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

Finnish Engineering Education for Sustainable Development in 2016 - Call for collaborative learning

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, The Education Fund
Contributors: Takala, A., Korhonen-Yrjänheikki, K.
Publication date: Sep 2016

Host publication information

Title of host publication: SEFI 2016 Annual Conference Proceedings : Engineering Education on Top of the World: Industry University Cooperation
Publisher: European Society for Engineering Education SEFI
ISBN (Electronic): 9782873520144

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

Learning for sustainable water and sanitation services

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A.
Pages: 250-258
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 8th International Conference on Engineering Education for Sustainable Development (Bruges, 4-7 September 2016) : Building a circular economy together
Place of publication: Brugge
Publisher: Instituut vóór Duu rzame Ontwikkeling vzw
Editor: Mazijn, B.
Article number: D.3.2
ISBN (Electronic): 978-90-903-0131-0

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

The Web as a software platform: Ten years later

In the past ten years, the Web has become a dominant deployment environment for new software systems and applications. In view of its current popularity, it is easy to forget that only 10-15 years ago hardly any developer would write serious software applications for the Web. Today, the use of the web browser as a software platform is commonplace, and JavaScript has become one of the most popular programming languages in the world. In this paper we revisit some predictions that were made over ten years ago when the Lively Kernel project was started back in 2006. Ten years later, most of the elements of the original vision have been fulfilled, although not entirely in the fashion we originally envisioned. We look back at the Lively Kernel vision, reflecting our original goals to the state of the art in web programming today.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing, Nokia, University of Helsinki
Contributors: Taivalsaari, A., Mikkonen, T.
Number of pages: 10
Pages: 41-50
Publication date: 2017

Host publication information

Title of host publication: WEBIST 2017 - Proceedings of the 13th International Conference on Web Information Systems and Technologies
Publisher: SCITEPRESS
ISBN (Electronic): 9789897582462
ASJC Scopus subject areas: Computer Networks and Communications, Information Systems
Keywords: HTML5, JavaScript, Live object systems, Lively kernel, Web applications, Web programming
Source: Scopus
Source ID: 85024473230

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

Web User Interface Implementation Technologies: An Underview

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pervasive Computing, Research area: Software engineering, University of Lugano (USI), Università della Svizzera Italiana, Nokia Technologies, University of Helsinki
Contributors: Taivalsaari, A., Mikkonen, T., Systä, K., Pautasso, C.
Number of pages: 10
Pages: 127-136
Publication date: 5 Sep 2018

Host publication information

Title of host publication: 14th International Conference on Web Information Systems and Technologies
Publisher: SCITEPRESS
ISBN (Print): 978-989-758-324-7

Bibliographical note

EXT="Taivalsaari, Antero"
EXT="Mikkonen, Tommi"

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

Towards a Classification Schema for Development Technologies: an Empirical Study in the Avionic Domain

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University of Kaiserslautern, Free University of Bozen-Bolzano, Free University of Bolzano-Bozen, Liebherr-Aerospace
Contributors: Taibi, D., Lenarduzzi, V., Dieudonne, L., Plociennik, C.
Number of pages: 11
Pages: 125-135
Publication date: 1 Aug 2015
Peer-reviewed: Yes

Publication information

Journal: INTERNATIONAL JOURNAL ON ADVANCES IN SOFTWARE
Volume: 8
Issue number: 1&2
ISSN (Print): 1942-2628
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Architectural patterns for microservices: A systematic mapping study

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

General information

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

Host publication information

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

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

From monolithic systems to microservices: A decomposition framework based on process mining

Decomposition is one of the most complex tasks during the migration from monolithic systems to microservices, generally performed manually, based on the experience of the software architects. In this work, we propose a 6-step framework to reduce the subjectivity of the decomposition process. The framework provides software architects with a set of decomposition options, together with a set of measures to evaluate and compare their quality. The decomposition options are identified based on the independent execution traces of the system by means of the application of a process-mining tool to the log traces collected at runtime. We validated the process, in an industrial project, by comparing the proposed decomposition options with the one proposed by the software architect that manually analyzed the system. The application of our framework allowed the company to identify issues in their software that the architect did not spot manually, and to discover more suitable decomposition options that the architect did not consider. The framework could be very useful also in other companies to improve the quality of the decomposition of any monolithic system, identifying different decomposition strategies and reducing the subjectivity of the decomposition process. Moreover, researchers could extend our approach increasing the support and further automating the decomposition support.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, TASE - Tampere Software Engineering Research Group
Contributors: Taibi, D., Systä, K.
Number of pages: 12
Pages: 153-164
Publication date: 2019

Host publication information

Title of host publication: CLOSER 2019 - Proceedings of the 9th International Conference on Cloud Computing and Services Science
Publisher: SCITEPRESS
Editors: Ferguson, D., Munoz, V. M., Helfert, M., Pahl, C.
ISBN (Electronic): 9789897583650
ASJC Scopus subject areas: Computer Science (miscellaneous), Computer Science Applications
Keywords: Cloud-native, Microservice decomposition, Microservice migration, Microservice slicing, Microservices
Source: Scopus
Source ID: 85067463647

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

Project types and industrial collaboration in project-based learning

Project-based learning is important in engineering education as is makes the students test their skills in a real-life setting. We have organised project-based learning for software engineering students since 1991. Already in the early times, the projects were based on collaboration with near-by companies and other customers. This collaboration with external organisations, called customers in this paper, creates strong links between education and surrounding society.

In this paper, we report the experiences from our project courses. Especially we describe 1) how the courses have helped collaboration between students, teachers and companies, 2) the different categories for topics and goals of the projects. Based on the analysis, we outline a new project type, a technology exploration project.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: Software engineering
Contributors: Systä, K., Vuori, M., Järvinen, H., Ahtee, T., Sten, H.
Number of pages: 11
Publication date: 12 Nov 2016

Host publication information

Title of host publication: Proceedings of SEFI 2016 annual conference
Place of publication: Tampere / Brussels
Publisher: European Society for Engineering Education SEFI
Editors: Järvinen, H., Clark, R.
ISBN (Electronic): 9782873520144
ASJC Scopus subject areas: Computer Science(all)
Keywords:  project courses, engineering education, innovation, university-industry collaboration

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

On the Socio-Technical Dependencies in Free/Libre/Open Source Software Projects

During the course of the past two decades, Open Source Software (OSS) development model has lead to a number of projects which have produced software that rivals and in some cases even exceeds the scale and quality of the traditional software projects. Among others, Eclipse, Apache, Linux, and BSD operating system are representative examples of such success stories.

However, OSS project like traditional in-house projects, often pose the potential for enormous problems, whose effects run the gamut from immense cumulative delay through complete breakdown and failure. This situation is evident, as OSS development is a socio-technical endeavor and is non-trivial. Such development occurs within an intensively collaborative process, in which technical prowess must go hand in hand with the efficient coordination and management of a large number of social, inter-personal interactions across the development organization. Furthermore, those social and technical dimensions are not orthogonal. It has been recognized that the structure of a software product and the layout of the development organization working on that product correlate.

Therefore this thesis argue that a comprehensive understanding on the sustainable evolution of OSS projects can be gained through the examination of the mutual influence of social and technical dimensions in OSS development. Thus, the goal of this thesis is the verification and reasoning of the following proposition,

“The evolution of the Open Source Software (OSS) project is constrained by the non-orthogonal evolution of Social and Technical dimensions (often termed as Socio-Technical dependency) of such projects”.

In concrete terms, this thesis investigates and measures empirically the extent to which the two dimensions of OSS projects, social and technical, approximate and influence each other during the evolution of the projects. Perceived insight is then used to build proposals that would provide empirical basis to frame theory around the affirmed proposition.

Moving towards this goal, this thesis proposes models, methods, frameworks and tool supports to measure, assess, and reason the socio-technical dependency within OSS project context. The starting point is to propose a data model to mimic the social and technical dimensions and their inter-relationships. This model is instantiated through the repository data of OSS projects that represent each of these dimensions. Then, methods and a mathematical model are proposed to derive dependency between the two dimensions, and to utilize them in measuring socio-technical dependency quantitatively. These proposals are then put into practice within distinct OSS project contexts to empirically measure and investigate socio-technical dependency. Along the process, frameworks, architectural design and corresponding tool implementations are provided to automate the analysis and visualization of such dependency.

Reported results suggest that high degree of socio-technical congruence can be considered as the implicit underlying principle for building team collaboration and coordination within the developer community of long lived OSS projects. Even being highly distributed community of developers, and mostly using passive communication channels, OSS communities are tied together by maintaining task dependent communication. Such communication is often ad-hoc, adaptive and situated as it cope with rapid and continuous changes in the underlying software.

Additionally, collaboration among projects are significantly influenced by the resembling properties among the projects. Resembling properties (e.g., project domain, size, and programming language) often form a favorable ground, thus creating a stimuli for developers to participate in those projects.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Pervasive Computing, Research area: Software engineering
Contributors: Syeed, M. M. M.
Publication date: 29 May 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3525-3
ISBN (Electronic): 978-952-15-3533-8
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1300
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Public-sector as an Initiator in a Collaborative Innovation Process

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Suominen, A. H., Mäenpää, S., Breite, R.
Number of pages: 12
Publication date: 2015

Host publication information

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

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

Network archetypes in the network formation phase - case new market entry of Finnish maritime network

A theory of co-opetition in supply networks with specified four archetypes has been proposed in the earlier literature. As the model is not yet exhaustive, this study examines it in a case network in its formation phase. The findings bring new contribution to understanding the model of supply network archetypes and the utility of its four interrelated elements in forming strategic supply networks. The results provide novel evidence that competing situation within network and network organizations’ co-opetitive or non-collaborative strategies with competitors, are essential information when forming a network, determining its network level objectives and governance.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Suominen, A., Breite, R.
Number of pages: 10
Publication date: 29 Jun 2015

Host publication information

Title of host publication: 22nd International Annual EurOMA Conference Neuchâtel, Switzerland 28 June – 1 July 2015
ASJC Scopus subject areas: Business, Management and Accounting(all)
Keywords: supply network archetype, co-opetition, network governance model

Bibliographical note

xoa

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

Enablers and barriers of inter-organizational network’s formation for new market entry: case Finnish maritime industry

Failures of networking attempts are rarely reported in the literature. This study examined an intentionally formed, non-successful case network in its formation phase by using Lowensberg’ holistic conceptual model for strategic alliance issues that links six organizational theories to the network management processes. This empirical study of a whole network at network level involved one survey (n=20) and 61 semi-structured interviews in more than 20 Finnish maritime industry organizations and observations in six workshops, while the network aimed at joint market entry. The paper presents 11 enablers
and six barriers discovered in the networks formation phase. The findings contribute to understanding the enablers and barriers in network formation affecting failure, especially the significance of network strategy formulation and communication to network organizations in intentionally formed networks. Presenting conclusions for academics and managers, the paper fulfils the gap in the literature of whole networks, particularly their failures in their formation
phase.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Suominen, A.
Number of pages: 30
Publication date: 3 Jul 2015

Host publication information

Title of host publication:  31st EGOS Colloquium, General Theme, Organizations and the Examined Life: Reason, Reflexivity and Responsibility, July 2–4, 2015 Athens, Greece
Publisher: SAGE Publications

Publication series

Name: Organization Studies
ISSN (Print): 0170-8406
ISSN (Electronic): 1741-3044
ASJC Scopus subject areas: Social Sciences(all), Business, Management and Accounting(all)
Keywords: network strategy, network formation, network failure, whole network, market entry

Bibliographical note

xoa Enablers and barriers of inter-organizational networks formation 14.7.2015 ei tarkistettu, siirretty kohdasta additional files

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

Framework for optimization and scheduling of a copper production plant

This work presents a nonlinear optimization and scheduling approach applied to a copper production plant. The solution maximizes smelting furnace production and provides valid converting schedules by simulating the evolution of the process over the optimization horizon. The production process is briefly described and the main models used to predict and calculate furnace and converter parameters are detailed. Though the solution is concentrated on the main elements, copper and iron, the optimization framework enables easy future augmentation with more complex models. A schedule optimization case is presented.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Automation Science and Engineering, Research area: Dynamic Systems, Research area: Measurement Technology and Process Control
Contributors: Suominen, O., Mörsky, V., Ritala, R., Vilkko, M.
Number of pages: 6
Pages: 1243-1248
Publication date: 25 Jun 2016

Host publication information

Title of host publication: 26th European Symposium on Computer Aided Process Engineering, 2016
Volume: 38
Publisher: Elsevier Science B.V.
ISBN (Print): 9780444634283

Publication series

Name: Computer Aided Chemical Engineering
ISSN (Print): 1570-7946
ASJC Scopus subject areas: Chemical Engineering(all), Computer Science Applications
Keywords: copper smelting, modelling, nonlinear optimization, Scheduling

Bibliographical note

JUFOID=70254

Source: Scopus
Source ID: 84994385954

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

Power bases in lead organization network governance form: a multi-level approach

General information

Publication status: Published
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Suominen, A., Mäenpää, S.
Publication date: 7 Jul 2016
Peer-reviewed: Unknown
Event: Paper presented at European Group for Organizational Studies Colloquium, .

Research output: Other conference contributionPaper, poster or abstractScientific

Knowledge sharing in knowledge collectivity: case digitalization in industrial network

Knowledge sharing (KS) in the inter-organizational setting is not widely researched area. However, in temporary organizations such as projects, sharing expert knowledge is essential and may take place in knowledge collectivities, i.e., Collectivities of Practices (ClP). Due to ClPs’ often temporary nature, time and socialization are lacking, thus efficient KS practices are required. The complexity of projects may also necessitate ClPs to cross organization boundaries, forming inter-organizational ClPs, IO-ClPs. Therefore, a better understanding of intra-organizational practices overlapping inter-organizational KS is called for. This paper contemplates on who should participate and how the process of boundary spanning KS should be put into practice in IO-ClP context. We present a case of a network-dependent focal company aiming to form a new digitalization strategy, which requires boundary-spanning knowledge management (KM) approaches. We concentrate both on intra- and inter-organizational steps needed for developing a digitalization roadmap eventually encompassing the whole network. Based on case observations we conclude that KS in industrial IO-ClP context involves multiple internal and external stakeholders, which also play facilitating roles in KS process. The results also reveal that it is possible to achieve KS in a larger group with a stepwise, well-facilitated and goal-oriented approach that involves experts into practices gradually. Additionally, complex phenomena in industrial networks, such as digitalization, requires other processes of KM besides KS: knowledge transfer for explicit knowledge and knowledge creation at the network level, too. Thus, in IO-ClP setting, KM processes of the company and network should be approached holistically, aiming at an overall view. The results shed light on KS in inter-organizational setting, particularly the overlap between intra-organizational practices and inter-organizational KS within knowledge collectivities. We contribute to boundary spanning inter-organizational KS by adding a description of the KS practices in ClPs, which is based on the theory of social constructivism of knowledge, and expand the viewpoint of the ClP-concept also towards inter-organizational setting.

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
Contributors: Suominen, A. H., Mäenpää, S.
Number of pages: 8
Pages: 956-963
Publication date: 7 Sep 2017

Host publication information

Title of host publication: Proceedings of the 18th European Conference on Knowledge Management ECKM 2017 : 7-8 September 2017, Barcelona, Spain
Publisher: Academic Conferences and Publishing International
Editors: Marimon, F., Mas-Machuca, M., Berbegal-Mirabent, J., Bastida, R.
ISBN (Print): 978-1-911218-48-7
ISBN (Electronic): 978-1-911218-49-4
ASJC Scopus subject areas: Business, Management and Accounting(all)

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

Revisiting technological depths and breadths effects on firm performance: the case of pharmaceutical industry

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Information and Knowledge Management, Research group: Business Ecosystems, Networks and Innovations, VTT Tech Res Ctr Finland, VTT Technical Research Center Finland, VTT Technical Research Centre of Finland, Innovation and Knowledge Economy, VTT Technical Research Centre of Finland
Contributors: Suominen, A., Hajikhani, A., Seppänen, M.
Publication date: Jun 2019

Host publication information

Title of host publication: Proceedings of International Society for Professional Innovation Management (ISPIM) : 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 contributionScientific

Task-setting strategies for hackathon goal achievement in industrial intra-organizational innovation

This paper addresses the hackathon as an innovation contest method in the IT industry, beyond the coding context. Specifically, it focuses on hackathon task-setting strategies, i.e. drawing boundaries to specify the problem to be solved. Although task setting plays an integral part in hackathon goal achievement, i.e. whether the hackathon is perceived as successful or not, task setting has not yet been the focus of hackathon research. Therefore, this paper presents a case study of an IT company with four subsidiaries operating in four countries in the Baltic region, carrying out 17 intra- or intra-inter-organizational hackathons in six iterations. As a result, the paper reveals hackathon task-setting strategies in terms of the employee maturity level regarding the corporate context of the subsidiaries. Presenting conclusions for both academics and industry, the paper contributes to the literature on hackathon task-setting strategies particularly in organizations in the IT sector, with varying maturity levels.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Information and Knowledge Management, Research group: Business Ecosystems, Networks and Innovations, curlabs ab, Häme University of Applied Sciences
Contributors: Suominen, A., Jonsson, V., Bäckman, J., Halvari, S.
Number of pages: 14
Publication date: 19 Jun 2019

Host publication information

Title of host publication: The ISPIM Innovation Conference – Celebrating Innovation: 500 Years Since daVinci : 16-19 June 2019, Florence, Italy
Volume: 93
Place of publication: Florence, Italy
Publisher: International Society for Professional Innovation Management ISPIM
Editor: Bitran, I.
ISBN (Print): 978-952-335-351-0

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

Towards Capturing Interaction in the Interactive Use of Controls - The Role of Reflection

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Cost Management Center
Contributors: Suomala, P., Hilden, S.
Publication date: 2015

Host publication information

Title of host publication: 8th conference on performance measurement and management control, Nice, France, September 30 October 2, 2015

Publication series

Name: Conference on performance measurement and management control
Publisher: European Institute for Advanced Studies in Management
ISSN (Print): 2295-1660

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

Effect of air gap on the adhesion of PET layer on cardboard substrate in extrusion coating

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science
Contributors: Suokas, E.
Number of pages: 16
Pages: 529-544
Publication date: 1 Jan 2017

Host publication information

Title of host publication: 16th TAPPI European PLACE Conference 2017
Publisher: TAPPI Press
ISBN (Electronic): 9781510850880
ASJC Scopus subject areas: Media Technology, Chemical Engineering(all), Chemistry(all), Mechanical Engineering, Materials Science(all)
Source: Scopus
Source ID: 85044480842

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

Process time importance in the product properties evolvement during extrusion coating of different LDPE grades

Process time in air gap region is one of the most important variables in the coating property development, when the molten polymer is moving from the die exit into the nip region in extrusion coating. Coating property evolvement of different LDPE grades are presented in the paper. The importance of the throughput rate and line speed to the process times is discussed by considering the effect of molecular structure of different polyolefins. The draw down ratio based on the grammage measurements is proposed to use in the practical situations.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, Research group: Paper Converting and Packaging
Contributors: Suokas, E., Kuusipalo, J.
Number of pages: 9
Pages: 151-159
Publication date: 1 Jan 2018

Host publication information

Title of host publication: 15th TAPPI Advanced Coating Fundamentals Symposium 2018 : Charlotte; United States; 14 April 2018 through 15 April 2018
Publisher: TAPPI Press
ISBN (Electronic): 9781510871885
ASJC Scopus subject areas: Media Technology, Materials Chemistry, Surfaces, Coatings and Films
Source: Scopus
Source ID: 85059262851

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

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

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

General information

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

Host publication information

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

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

User experience in technology investment decisions of industrial firms

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, Pori Department, Research group: Business Ecosystems, Networks and Innovations
Contributors: Sundberg, H., Seppänen, M.
Publication date: 10 Jun 2015

Host publication information

Title of host publication: 22nd Innovation & Product Development Management Conference, IPDMC
Place of publication: Copenhagen
Publisher: EIASM

Bibliographical note

ORG=pla,0.5
ORG=tta,0.5

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

Recurrence network analysis of wide band oscillations of local field potentials from the primary motor cortex reveals rich dynamics.

Aggregate signals that reflect activities of a large number of neurons in the cerebral cortex, local field potentials (LFPs) have been observed to mediate gross functional activities of a relatively small volume of the brain tissues. There are several bands of the oscillations frequencies in LFPs that have been observed across multiple brain areas. The signature oscillation band of the LFPs in the primary motor cortex (MI) is over β range and it has been consistently observed both in human and non-human primates around the time of visual cues and movement onsets. However, its dynamical behavior has not been well characterized. Furthermore, dynamics of β oscillations has been documented based on the phase locking of β oscillations, but not in terms of the inherent dynamics of the oscillations themselves. Here, we used the complexity measure derived from cluster coefficients of a recurrence network and analyzed a pair of wide-band signals, one including β band of the LFPs and the other ranging the low γ band in MI recorded from a non-human primate. We show rather unique temporal profiles of the evoked responses using complexity of the dynamical behavior in both bands of the oscillation, either of which is not simply resembling either the power of the oscillation or the phase locking of β oscillations. Therefore, the current method can reveal a new type of dynamics of the underlying network complexity during the task simply based on event evoked potentials of wide-band oscillatory signals.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Research group: Computational Biophysics and Imaging Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), Department of Organismal Biology and Anatomy, University of Chicago
Contributors: Subramaniyam, N. P., Hyttinen, J., Hatsopoulos, N. G., Takahashi, K.
Number of pages: 4
Pages: 960-963
Publication date: 1 Jul 2015

Host publication information

Title of host publication: International IEEE/EMBS Conference on Neural Engineering, NER
Publisher: IEEE COMPUTER SOCIETY PRESS
ISBN (Print): 9781467363891
ASJC Scopus subject areas: Artificial Intelligence, Mechanical Engineering
Keywords: event evoked potentials, functional connectivity, Local field potentials, motor cortex, recurrence network, temporal dynamics
Source: Scopus
Source ID: 84940371617

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

Effects of subsampling on characteristics of RNA‑seq data from triple‑negative breast cancer patients

Background: Data from RNA-seq experiments provide a wealth of information about the transcriptome of an organism. However, the analysis of such data is very demanding. In this study, we aimed to establish robust analysis procedures that can be used in clinical practice. Methods: We studied RNA-seq data from triple-negative breast cancer patients. Specifically, we investigated the subsampling of RNA-seq data. Results: The main results of our investigations are as follows: (1) the subsampling of RNA-seq data gave biologically realistic simulations of sequencing experiments with smaller sequencing depth but not direct scaling of count matrices; (2) the saturation of results required an average sequencing depth larger than 32 million reads and an individual sequencing depth larger than 46 million reads; and (3) for an abrogated feature selection, higher moments of the distribution of all expressed genes had a higher sensitivity for signal detection than the corresponding mean values. Conclusions: Our results reveal important characteristics of RNA-seq data that must be understood before one can apply such an approach to translational medicine.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Signal Processing, Queen's University, Belfast, Northern Ireland, University of Arkansas for Medical Sciences
Contributors: Stupnikov, A., Glazko, G. V., Emmert-Streib, F.
Publication date: 8 Sep 2015
Peer-reviewed: Yes

Publication information

Journal: Chinese Journal of Cancer
Volume: 34
Issue number: 10
ISSN (Print): 1944-446X
Ratings: 
  • Scopus rating (2015): CiteScore 4.8 SJR 1.081
Original language: English
ASJC Scopus subject areas: Oncology
Keywords: Computational genomics, High-dimensional biology, RNA-seq data, Statistical robustness, Triple-negative breast cancer
Source: Scopus
Source ID: 84944199836

Research output: Contribution to journalArticleScientificpeer-review

Open knowledge-driven manufacturing & logistics - The eScop approach

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Automation Science and Engineering, Research group: Factory automation systems technology
Contributors: Strzelczak, S. (ed.), Balda, P. (ed.), Garetti, M. (ed.), Lobov, A. (ed.)
Number of pages: 404
Publication date: 2015

Publication information

Place of publication: Warsaw, Poland
Publisher: Warsaw University of Technology Publishing House
ISBN (Print): 978-83-7814-440-3
Original language: English

Research output: Book/ReportAnthologyScientificpeer-review

Dynamic laser speckle metrology with binarization of speckle patterns

Dynamic laser speckle analysis is non-destructive detection of physical or biological activity through statistical processing of speckle patterns on the surface of diffusely reflecting objects. This method is sensitive to microscopic changes of the surface over time and needs simple optical means. Advances in computers and 2D optical sensors forced development of pointwise algorithms. They rely on acquisition of a temporal sequence of correlated speckle images and generate activity data as a 2D spatial contour map of the estimate of a given statistical parameter. The most widely used pointwise estimates are the intensity-based estimates which compose each map entry from a time sequence of intensity values taken at one and the same pixel in the acquired speckle images. Accuracy of the pointwise approach is strongly affected by the signal-dependent nature of the speckle data when the spread of intensity fluctuations depends on the intensity itself. The latter leads to erroneous activity determination at non-uniform distribution of intensity in the laser beam for the non-normalized estimates. Normalization of the estimates, introduces errors. We propose to apply binarization to the acquired speckle images by comparing the intensity values in the temporal sequence for a given spatial point to the mean intensity value estimated for this point and to evaluate a polar correlation function. Efficiency of this new processing algorithm is checked both by simulation and experiment.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: 3D MEDIA, Bulgarian Academy of Sciences
Contributors: Stoykova, E., Nazarova, D., Berberova, N., Gotchev, A., Ivanov, B., Mateev, G.
Publication date: 2017

Host publication information

Title of host publication: 19th International Conference and School on Quantum Electronics: Laser Physics and Applications
Publisher: SPIE
Article number: 102260R
ISBN (Electronic): 9781510609532

Publication series

Name: Proceedings of SPIE
Volume: 10226
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: Binary patterns, Dynamic speckle, Intensity-based algorithms, Optical metrology, Pointwise processing

Bibliographical note

JUFOID=71479

Source: Scopus
Source ID: 85017345812

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

Customer lifetime value in manufacturing services

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Cost Management Center
Contributors: Stormi, K., Laine, T., Suomala, P.
Publication date: 15 Jun 2016

Host publication information

Title of host publication: Proceedings of the Manufacturing Accounting Research Conference 2016 : Lisbon, Portugal, June 15-17, 2016
Place of publication: Belgium
Publisher: European Institute for Advanced Studies in Management EIASM

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

Agile methods in performance management system development process

General information

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

Host publication information

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

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

Acquisition of E5 Galileo signals in Matlab

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Moving manufacturing back: a content-based literature review

The purpose of this research is to systematically review and analyze the state-of-the-art of research on the backshoring, reshoring, and insourcing of manufacturing, published in peer-reviewed international scientific journals. We identify 21 articles from 2005 to 2015. The content analysis identifies 23 factors that influence the decision to move manufacturing back, and which we categorize in 8 clusters. We also analyze the content with respect to research methodology, industry type, and firm size. Furthermore, we provide suggestions for further research on the phenomenon of moving manufacturing back in a research agenda.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Industrial Management, University of Southern Denmark, Lund University
Contributors: Stentoft, J., Olhager, J., Heikkilä, J., Thoms, L.
Publication date: Jun 2015

Host publication information

Title of host publication: 22nd EurOMA Conference : Operations management for sustainable competitiveness
Place of publication: Neuchatel, Switzerland

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

Quantitative Estimation of Long-living Fluorescent Molecules from Temporal Fluorescence Intensity Data Corrupted by Nonzero-mean Noise

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Laboratory of Biosystem Dynamics-LBD, Research area: Information Technology for Biology and Health, Research area: Intelligence in Machines, Research group: MMDM, Research area: Signal and Information Processing
Contributors: Startceva, S., Chandraseelan, J. G., Visa, A., Ribeiro, A. S.
Pages: 17-24
Publication date: 2016

Host publication information

Title of host publication: BIOSIGNALS 2016 - 9th International Conference on Bio-Inspired Systems and Signal Processing, Proceedings; Part of 9th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2016
Publisher: SCITEPRESS
ISBN (Print): 9789897581700

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

Remarks on characterization of bent functions in terms of gibbs dyadic derivatives

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Signal Processing, Research group: Algebraic and Algorithmic Methods in Signal Processing AAMSP, Signal Processing Research Community (SPRC), University of Niš, Technical University of Dortmund
Contributors: Stanković, R. S., Astola, J. T., Moraga, C., Stanković, M., Gajić, D.
Number of pages: 8
Pages: 632-639
Publication date: 2015

Host publication information

Title of host publication: Computer Aided Systems Theory – EUROCAST 2015 : 15th International Conference, Las Palmas de Gran Canaria, Spain, February 8-13, 2015, Revised Selected Papers
Publisher: Springer
ISBN (Print): 978-3-319-27339-6
ISBN (Electronic): 978-3-319-27340-2

Publication series

Name: Lecture Notes in Computer Science
Volume: 9520
ISSN (Print): 0302-9743
ISSN (Electronic): 1611-3349
ASJC Scopus subject areas: Computer Science(all), Theoretical Computer Science
Keywords: Bent functions, Dyadic derivatives, GPU, Walsh functions
Source: Scopus
Source ID: 84952325470

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

Gibbs Dyadic Differentiation on Groups - Evolution of the Concept

Differential operators are usually used to determine the rate of change and the direction of change of a signal modeled by a function in some appropriately selected function space. Gibbs derivatives are introduced as operators permitting differentiation of piecewise constant functions. Being initially intended for applications in Walsh dyadic analysis, they are defined as operators having Walsh functions as eigenfunctions. This feature was used in different generalizations and extensions of the concept firstly defined for functions on finite dyadic groups. In this paper, we provide a brief overview of the evolution of this concept into a particlar class of differential operators for functions on various groups.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Department of Computer Science, Faculty of Electronic Engineering, Technical University of Dortmund
Contributors: Stankovic, R. S., Astola, J., Moraga, C.
Number of pages: 9
Pages: 229-237
Publication date: 2018

Host publication information

Title of host publication: Computer Aided Systems Theory – EUROCAST 2017 - 16th International Conference, Revised Selected Papers
Publisher: Springer Verlag
ISBN (Print): 9783319747262

Publication series

Name: Lecture Notes in Computer Science
Volume: 10672
ISSN (Print): 0302-9743
ISSN (Electronic): 1611-3349
ASJC Scopus subject areas: Theoretical Computer Science, Computer Science(all)

Bibliographical note

EXT="Stankovic, Radomir S."
jufoid=79748

Source: Scopus
Source ID: 85041720547

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

Towards the Structure of a Class of Permutation Matrices Associated With Bent Functions

Bent functions, that are useful in cryptographic applications, can be characterized in different ways. A recently formulated characterization is in terms of the Gibbs dyadic derivative. This characterization can be interpreted through permutation matrices associated with bent functions by this differential operator. We point out that these permutation matrices express some characteristic block structure and discuss a possible determination of it as a set of rules that should be satisfied by the corresponding submatrices. We believe that a further study of this structure can bring interesting results providing a deeper insight into features of bent functions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, Mathematical Institute of SASA, Faculty of Electronic Engineering, Technical University of Dortmund
Contributors: Stankovic, R. S., Stankovic, M., Astola, J., Moraga, C.
Pages: 83-105
Publication date: 2018

Host publication information

Title of host publication: Proceedings of the 13 International Workshop on Boolean Problems
Publisher: Springer
ISBN (Print): 978-3-030-20322-1
ISBN (Electronic): 978-3-030-20323-8

Bibliographical note

EXT="Stankovic, Radomir S."

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

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

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

General information

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

Publication information

Journal: Translational Behavioral Medicine
Volume: 5
Issue number: 3
ISSN (Print): 1869-6716
Ratings: 
  • Scopus rating (2015): CiteScore 3.1 SJR 0.754 SNIP 0.838
Original language: English
ASJC Scopus subject areas: Behavioral Neuroscience, Applied Psychology
Keywords: Computational models of behavior, Connected health, Health-related behavior, Just-in-time adaptive interventions, mHealth, Mobile health, Real-time interventions

Bibliographical note

EXT="Saranummi, Niilo"

Source: Scopus
Source ID: 84939204163

Research output: Contribution to journalArticleScientificpeer-review

Case depth prediction of nitrided components

General information

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

Host publication information

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

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

Moduulirakentaminen: Teräskennoteknologian mahdollisuudet

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Sorri, J. (ed.)
Number of pages: 114
Publication date: 2013

Publication information

Publisher: Tampereen teknillinen yliopisto. Rakennustekniikan laitos
ISBN (Print): 978-952-15-3035-7
ISBN (Electronic): 978-952-15-3036-4
Original language: Finnish

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikan laitos. Rakennustuotanto ja -talous. Raportti
Publisher: Tampereen teknillinen yliopisto
Volume: 14
ISSN (Print): 1797-8904

Bibliographical note

Versio ok 16.12.2015

Research output: Book/ReportCommissioned reportProfessional

Building Codes and Demand Response of Energy Use

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

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

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

General information

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

Host publication information

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

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

Energiatehokkuusinformaatio palvelurakennuksissa

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Sorri, J., Heljo, J., Uotila, U., Ruusala, A.
Number of pages: 6
Pages: 325-330
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
Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto, Rakennustekniikka, Rakennusfysiikka
ISBN (Print): 978-952-15-4022-6

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.

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

Image-based characterization of the pulp flows

Material flow characterization is important in the process industries and its further automation. In this study, close-to-laminar pulp suspension flows are analyzed based on double-exposure images captured in laboratory conditions. The correlation-based methods including autocorrelation and the particle image pattern technique were studied. During the experiments, synthetic and real test data with manual ground truth were used. The particle image pattern matching method showed better performance achieving the accuracy of 90.0% for the real data set with linear motion of the suspension and 79.2% for the data set with flow distortions.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Signal Processing, Lappeenranta University of Technology, Machine Vision and Pattern Recognition Laboratory, Laboratory of Biosystem Dynamics, Univ of Oulu, Monash University Malaysia
Contributors: Sorokin, M., Strokina, N., Eerola, T., Lensu, L., Karttunen, K., Kalviainen, H.
Number of pages: 8
Pages: 630-637
Publication date: 1 Jul 2016
Peer-reviewed: Yes

Publication information

Journal: Pattern Recognition and Image Analysis
Volume: 26
Issue number: 3
ISSN (Print): 1054-6618
Ratings: 
  • Scopus rating (2016): CiteScore 0.7 SJR 0.255 SNIP 0.872
Original language: English
ASJC Scopus subject areas: Computer Graphics and Computer-Aided Design, Computer Vision and Pattern Recognition
Keywords: double-exposure, particle image velocimetry, pulp flow estimation
Source: Scopus
Source ID: 84984924424

Research output: Contribution to journalArticleScientificpeer-review

Interdisciplinary water research network building within Nordic and Baltic countries.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Department of Civil Engineering
Contributors: Sörensen, J., Kurki, V., Sidaraviciute, R., Ngari Kibocha, S., Retike, I., Ikobe, G., Tichonovas, M., Elijosiute, E., Rajala, R.
Number of pages: 5
Pages: 79-83
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Vatten
Issue number: 71
ISSN (Print): 0042-2886
Original language: English

Research output: Contribution to journalReview ArticleScientificpeer-review

Mechanisms of disruptive technological change: Case studies in transformation of traditional industries

The purpose of the manuscript is to use grounded theory building method to investigate three industry contexts that show disruptive innovations based in digital technologies that change the dynamics in industry competition. Specifically, we investigate the mechanisms of disruption in these cases and seek common features of change. Our analysis builds on mechanisms as detecting actors, their properties, and start- and end-states of the system under change and activities of the actors that bring about the change. Our analysis shows common themes that are exhibited throughout all the cases. One of these mechanisms is de-coupling of traditional value chain activities. These de-coupling mechanisms are driven by the formation of innovation ecosystems rather than traditional value chains. This is further accelerated by the emergence of platforms and digital technologies at large. We propose, based on our results, some fundamental mechanisms that are driving industry transformation due to digitalization. We also discuss managerial and theoretical implications of our results in detail.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Center for Innovation and Technology Research
Contributors: Sommarberg, M., Mäkinen, S.
Number of pages: 10
Pages: 1-10
Publication date: 1 Dec 2017

Host publication information

Title of host publication: Proceedings in 2017 Portland International Conference in Management and Engineering (PICMET) : (PICMET) 9-13 July 2017
Publisher: IEEE
ISBN (Electronic): 978-1-890843-36-6

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

Technopreneurial Characteristics Rising from the Ashes of Creative Destruction

This paper uses the grounded theory building method to investigate the differences and similarities in the evolutionary paths of three entrepreneurial ventures. Theory-based reasoning was used to select cases representing different technopreneurial business models, namely product, expert service, and integrated product-service business models. Our cases emerged from a disrupted global technology corporation and they represent the economic activity emerging from classical creative destruction. We investigate the evolutionary paths of these ventures from their start-up by employing the resource-based view (RBV) approach to determine the critical change points and watershed events that guide the path of the cases. With these analyses, we are able to differentiate the performance differentials and evolutionary trajectories of the cases. The cases suggest that while the strength of the original path is strong it is possible to change the course despite path dependencies. We outline the mechanisms that facilitated these transitions (e.g., finding a suitable equity fund as a catalyst to make the change). Hence, we find that entrepreneurial ventures are not as path dependent as previous studies suggest; rather, there is managerial discretion to change the evolutionary trajectories. Our study suggests that the capabilities acquired over a long period of time in a global technology corporation contribute to the ability to change the path. We discuss the theoretical and practical implications of the critical decision points during the evolutionary trajectories of ventures.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Industrial and Information Management, Research group: Center for Innovation and Technology Research
Contributors: Sommarberg, M., Mäkinen, S.
Number of pages: 10
Pages: 1-10
Publication date: 1 Oct 2018

Host publication information

Title of host publication: Proceedings in 2018 Portland International Conference in Management and Engineering (PICMET) : (PICMET) 19-23 August 2018
Publisher: IEEE
ISBN (Electronic): 978-1-890843-37-3

Bibliographical note

jufoid=9093

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

Digital image correlation study of the deformation and functioning of the human heart during open-heart surgery

Currently, ultrasound technology is routinely used for monitoring of the left side of the human heart during open-heart surgery. However, this method shows shortcomings in providing accurate information of the right ventricle and atrium. The aim of this paper is to demonstrate how Digital Image Correlation (DIC) can be used to monitor the functioning of the heart during open-heart surgery and potentially overcome some of the shortcomings of ultrasound methods. Being a contact-free method is a major asset from a practical implementation perspective of DIC. In this paper, we present the methodology of the experiment and some preliminary results of a study in which a DIC system was installed in an operating room and image sequences of the heart were taken at three stages of the surgery. We present a procedure for obtaining DIC measurements in this challenging setting, discuss how the data was extracted as well as how the measured values changed during the operation in the context of the surgical stages and interventions performed.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, Research group: Materials Characterization
Contributors: Soltani, A., Curtze, S., Lahti, J., Järvelä, K., Laurikka, J., Hokka, M., Kuokkala, V. T.
Number of pages: 9
Pages: 19-27
Publication date: 2018

Host publication information

Title of host publication: Mechanics of Biological Systems, Materials and other topics in Experimental and Applied Mechanics - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
Volume: 4
Publisher: Springer New York LLC
ISBN (Print): 9783319635514

Publication series

Name: Conference Proceedings of the Society for Experimental Mechanics
ISSN (Print): 2191-5644
ISSN (Electronic): 2191-5652
ASJC Scopus subject areas: Engineering(all), Computational Mechanics, Mechanical Engineering
Keywords: Biomaterial characterization, Deformation, DIC, Motion, Open heart surgery
Source: Scopus
Source ID: 85032509230

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

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

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

General information

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

Host publication information

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

Bibliographical note

jufoid=72315

Source: Bibtex
Source ID: urn:e3e92af655321f382b94981bdab749a2

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

Research-industry collaboration: a review of the literature on evaluation methods and motivations

Relationships and collaborations between research and industry play an essential role in sustaining innovation. Therefore, different types of innovation models developed to refer to a set of interaction channels, mechanism and forms of linkage between academia and industry. The latter studies highlight enhancing and diminishing factors of collaboration management, practices on knowledge interactions and collaborative relationships on various levels depending on considered industrial sectors. This review establishes the state of current knowledge in the field and classifies key metrics and indicators for evaluation of research-industry collaboration linkage.

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, CERN, European Organization for Nuclear Research (CERN)
Contributors: Solodko, A., Mäkinen, S., Lasheras, N. C., Bedolla, J. S., Saari, U.
Number of pages: 7
Publication date: 29 Aug 2019

Host publication information

Title of host publication: PICMET 2019 Conference : August 25-29, 2019, Portland, Oregon, USA
Place of publication: Portland
Article number: 19R0108
ISBN (Electronic): 978-1-890843-40-3

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

Full-Field Temperature and Strain Measurement in Dynamic Tension Tests on SS 304

The thermomechanical response of 304-stainless steel tension specimens to a range of strain rates from 7 × 10−3 s−1 to 2600 s − 1 was investigated. Quasi-static tests (7 × 10−3 to 0.8 s−1) were completed on a hydraulic load frame, intermediate tests (200 s−1) were performed with a modified pressure bar, and high strain rate tests (2600 s−1) on a split Hopkinson pressure bar. Full-field infrared thermography and strain measurements were recorded during each test. Infrared measurements were taken using the Telops FAST-IR 1000 infrared camera at rates up to 30,0000 frames per second. 2D-DIC was used to compute strain from simultaneously recorded visible images taken at rates up to 90,000 frames per second. Max temperatures of 290 °C were recorded in the necking region of a uniaxial specimen at a strain rate of 2600 s−1. These measurements can be used to investigate the transition of isothermal deformation to adiabatic deformation and to determine the portion of plastic work converted to heat at each strain rate.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Materials Science, Research group: Materials Characterization, The Ohio State University, Columbus, OH, USA, Department of Mechanical Engineering
Contributors: Smith, J., Kuokkala, V., Seidt, J., Gilat, A.
Number of pages: 8
Pages: 37-44
Publication date: 2016

Host publication information

Title of host publication: Dynamic Behavior of Materials, Volume 1 : Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
Publisher: Springer International Publishing
ISBN (Print): 978-3-319-41131-6
ISBN (Electronic): 978-3-319-41132-3

Publication series

Name: Conference proceedings of the Society for Experimental Mechanics
ISSN (Electronic): 2191-5644

Bibliographical note

JUFOID=72540

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

Internal Heat Generation in Tension Tests of AISI 316 Using Full-Field Temperature and Strain Measurements

Full-field temperature and strain measurements were recorded during tension tests of AISI 316 on a hydraulic load frame at a strain rate of 1 s⁻¹. The temperature increase was measured on one side of the specimen using a high speed IR camera while the deformation was measured on the opposite side with a visible camera, each at a frame rate of 500 FPS. Uniform deformation of the specimen was observed up to strains of 0.25 until necking occurred and localization strains reached up to 0.75 at failure. The maximum temperature as measured by the IR camera was 260 °C before failure. The fraction of plastic work converted to heat (ß) was calculated over the entire gage length of the specimen using the local measurements of stress, strain, and temperature and varied between 0.6 and 0.9 throughout the test.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, The Ohio State University, Columbus, OH, USA, Department of Mechanical Engineering
Contributors: Smith, J., Kuokkala, V., Seidt, J., Gilat, A.
Number of pages: 7
Pages: 97-103
Publication date: 2018

Host publication information

Title of host publication: Advancement of Optical Methods in Experimental Mechanics, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series
Volume: 3
Publisher: Springer New York LLC
ISBN (Print): 978-3-319-63027-4
ISBN (Electronic): 978-3-319-63028-1

Publication series

Name:  Conference Proceedings of the Society for Experimental Mechanics
ISSN (Print): 2191-5644

Bibliographical note

JUFOID=72540

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

Optimizing investment in ESD control

We examine strategies for optimizing investment in ESD protection and trade-offs that can arise. Standard ESD measures require low expertise but may result in unnecessary equipment spend. Tailored EPAs may require higher expertise and greater training. ESD control measures and equipment used with inadequate understanding can fail to yield the potential benefits expected. Optimal ESD control results from understanding ESD threats and control, with effective implementation.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Electronics and Communications Engineering, Electrostat Solut Ltd, Cascade Metrol
Contributors: Smallwood, J., Tamminen, P., Viheriäkoski, T.
Number of pages: 6
Publication date: 2014

Host publication information

Title of host publication: 2014 Electrical Overstress/Electrostatic Discharge Symposium (EOS/ESD)
Publisher: IEEE COMPUTER SOC

Publication series

Name: Electrical Overstress Electrostatic Discharge Symposium
Publisher: IEEE COMPUTER SOC
ISSN (Print): 0739-5159
Source: WOS
Source ID: 000355792800025

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

Second-harmonic generation from thermally-evaporated indium selenide thin films

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Physics, Research group: Nonlinear Optics, Research area: Optics
Contributors: Slablab, A., Divya, S., Koskinen, K., Czaplicki, R., Kailasnath, M., Radhakrishnan, P., Kauranen, M.
Pages: CE_12_4
Publication date: 21 Jun 2015

Host publication information

Title of host publication: The European Conference on Lasers and Electro-Optics 2015 : Munich Germany 21–25 June 2015
Publisher: Optical Society of America
ISBN (Electronic): 978-1-4673-7475-0
Source: Bibtex
Source ID: urn:888ad7045d652720bf995336ec1122eb

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

Development of a Low-Cost Fuzzy Gain Schedule Neutralization Control System

This paper has focused on the development of a Low-Cost Fuzzy Gain Schedule Neutralization Control System. The system dynamics has been identified for different operational conditions. The implementation and instrumentation of a typical Neutralization System using low cost elements, with an appropriate monitoring, control and data acquisition of the process variables has been successfully implemented, as well as the Fuzzy Gain Schedule pH neutralization controller. As inputs it has been used the Auxiliary Variable, defined with the linguist terms as Acid, Neutral and Alkaline by three trapezoidal membership functions, as well as the control error and the change in the control error, both defined by five triangular membership functions. The controller outputs were defined for the Acid and Alkali pumps by 18 triangular membership functions and it was defined a set of 50 fuzzy rules. The development of the control system considered in this paper reveals an attractive industrial application perspective, representing a potential application for water consumption reduction in industry, based on low cost elements.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, University of Campinas, Federal University of Uberlândia
Contributors: Sislian, R., Da Silva, F. V., Gedraite, R., Jokinen, H., An, D. K. R.
Number of pages: 4
Pages: 575-578
Publication date: Oct 2015

Host publication information

Title of host publication: WCECS 2015 - World Congress on Engineering and Computer Science 2015
Volume: II
Publisher: Newswood Limited
ISBN (Electronic): 9789881404725

Publication series

Name: Lecture Notes in Engineering and Computer Science
Volume: 2220
ISSN (Electronic): 2078-0966
ASJC Scopus subject areas: Computer Science (miscellaneous)
Keywords: Fuzzy control, Neutralization, Water consumption reduction
Source: Scopus
Source ID: 84992694500

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

The use of mathematical modeling for the development of a low cost fuzzy gain schedule neutralization control system

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Automation and Hydraulic Engineering, Faculty of Biomedical Sciences and Engineering, Federal Institute of São Paulo, Universidade Estadual de Campinas, Federal University of Uberlândia
Contributors: Sislian, R., da Silva, F. V., Gedraite, R., Jokinen, H., Rajan, D. K.
Number of pages: 15
Pages: 525-539
Publication date: 4 Feb 2017

Host publication information

Title of host publication: Transactions on Engineering Technologies : World Congress on Engineering and Computer Science 2015
Publisher: Springer Singapore
ISBN (Print): 9789811027161
ISBN (Electronic): 9789811027178
ASJC Scopus subject areas: Medicine(all), Biochemistry, Genetics and Molecular Biology(all), Immunology and Microbiology(all)

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

Recent progress in wafer-fused VECSELs emitting in the 1310 nm waveband

Over the last years we have continuously improved the performance of 1300 nm band VECSELs with wafer fused gain mirrors in the intra-cavity diamond and the flip-chip heat dissipation configurations. In this work we present recent results for gain mirrors that implement both heat-dissipation schemes applied to the same fused gain mirror structure. We demonstrate record high output powers of 7.1 W in the intra-cavity diamond heat-spreader configuration and 6.5 W in the flip-chip heat dissipation scheme. These improvements are achieved due to optimization of the wafer fused gain mirror structure based on AlGaInAs/InP-active region fused to AlAs-GaAs distributed Bragg reflector (DBR) and application of efficient methods of bonding semiconductor gain mirror chips to diamond heatspreaders.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Optoelectronics Research Centre, Research group: Ultrafast and intense lasers, Frontier Photonics, Ècole Polytechnique Fèdèrale de Lausanne, CH-1015 Lausanne, Switzerland
Contributors: Sirbu, A., Rantamäki, A., Iakolev, V., Mereuta, A., Caliman, A., Volet, N., Lyytikäinen, J., Okhotnikov, O., Kapon, E.
Number of pages: 7
Publication date: 2015

Host publication information

Title of host publication: Proceedings of SPIE vol. 8966, 2014.
Place of publication: BELLINGHAM
Publisher: SPIE
Editor: Guina, M.

Publication series

Name: Proceedings of SPIE
Publisher: SPIE-INT SOC OPTICAL ENGINEERING
Volume: 9349
ISSN (Print): 0277-786X
Keywords: Wafer-fused vertical-external-cavity surface-emitting lasers (VECSELs), wafer-fused gain mirrors, optically pumped VECSELs, photonics technology, SEMICONDUCTOR DISK LASER
Source: WOS
Source ID: 000353134900006

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

Effect of Laser Power on Yield of TiO2 Nanoparticles Synthesized by Pulsed Laser Ablation in Water

In this study, the pulsed laser ablation in liquids (PLAL) technique was used on titanium in deionized water at different laser powers to understand its effect on the synthesis yield of nanoparticles. A 500-ns 1062-nm fiber laser at 25 kHz was used to effect PLAL of titanium to produce nanoparticles. TEM images of the synthesized nanoparticles showed spherical particles ranging from 3 32 nm in diameter. The electron diffraction pattern and high peaks in the wide-angle x-ray scattering (WAXS) pattern indicated high crystallinity of nanoparticles. WAXS results showed nanoparticles were allotropes of titania: rutile and anatase. Synthesis yield measurements indicated an increase in yield with the increase in laser power as long as the increase in laser fluence remains proportional to the increase in laser power. However, the yield increased proportionally with the increase in laser fluence. The analysis of the chosen laser pulse duration and repetition rate showed an increase in the yield with longer pulse duration and higher repetition rate.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science, Research group: Ceramic materials, Mechanical Engineering and Industrial Systems, Research area: Manufacturing and Automation, Research group: Surface Engineering, Research group: Materials Characterization, Research group: Ceramic materials
Contributors: Singh, A., Vihinen, J., Frankberg, E., Hyvärinen, L., Honkanen, M., Levänen, E.
Number of pages: 5
Pages: 39-43
Publication date: Mar 2017
Peer-reviewed: Yes

Publication information

Journal: Journal of Ceramic Science and Technology
Volume: 8
Issue number: 1
ISSN (Print): 2190-9385
Ratings: 
  • Scopus rating (2017): CiteScore 1.4 SJR 0.374 SNIP 0.778
Original language: English
Keywords: Nanoparticles, synthesis yield, pulsed laser ablation in liquids, WAXS, laser fluence, WAVELENGTH, GOLD
Electronic versions: 
Source: WOS
Source ID: 000397702900008

Research output: Contribution to journalArticleScientificpeer-review

Influence of the rotor eccentricity on the torque of a cage induction machine

The non-uniform air gap in an electrical machine caused by rotor eccentricity creates an asymmetrical flux-density distribution in the air gap. This can affect the nominal torque produced by the machine. Eccentricity also produces forces that act on the rotor which may also have an effect on the torque. Thus, it is important to know how the torque of the machine behaves. In this paper, the torque of a cage induction machine is studied when the machine has dynamic eccentricity. The study is performed using the finite element method and a magnetic vector potential formulation. The torque is calculated by the method of energy balance. The harmonic components of the torque are also analyzed. The results show that the machine under eccentricity does not exhibit the same torque as a normal healthy machine. The harmonic components around the first principal slot harmonic is most affected.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Electrical Energy Engineering, Research group: Electromechanics, Research area: Power engineering, Aalto University
Contributors: Silwal, B., Rasilo, P., Belahcen, A., Arkkio, A.
Pages: 383-396
Publication date: Jun 2017
Peer-reviewed: Yes

Publication information

Journal: Archives of Electrical Engineering
Volume: 66
Issue number: 2
ISSN (Print): 2300-2506
Ratings: 
  • Scopus rating (2017): CiteScore 1.2 SJR 0.233 SNIP 0.65
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Home Network Security: Modelling Power Consumption to Detect and Prevent Attacks on Homenet Routers

Future home networks are expected to become extremely sophisticated, yet only the most technically adept persons are equipped with skills to secure them. In this paper, we provide a novel solution to detect and prevent attacks on home routers based on anomalous power consumption. We developed a means of measuring power consumption that could be used in a wide variety of home networks, although our primary focus on is on profiling Homenet-based residential routers, specifically to detect attacks against homenet routing infrastructure. Several experimental results are presented when the infrastructure is exposed to various types of attacks, which show strong evidence of the feasibility of our approach.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Pervasive Computing, Research area: Information security
Contributors: Silverajan, B., Vajaranta, M., Kolehmainen, A.
Pages: 9-16
Publication date: 4 Aug 2016

Host publication information

Title of host publication: Proceedings of the 11th Asia Joint Conference on Information Security (AsiaJCIS 2016), Fukuoka, Japan, August 4-5, 2016
Publisher: IEEE
ISBN (Electronic): 978-1-5090-2285-4

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

A Semantic Meta-Model Repository for Lightweight M2M

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

General information

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

Host publication information

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

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

Enabling cybersecurity incident reporting and coordinated handling for maritime sector

The maritime industry is experiencing a new era of digital transformation. At the same time as the number of cyberattacks and cybersecurity incidents are increasing, cybersecurity awareness and incident reporting in this sector remains low. In this paper, we describe a cybersecurity incident reporting system for the maritime industry that aims to address this issue. The work focuses on autonomous and unmanned vessels, but can be equally applied to other areas of the maritime industry. The proposed approach has been evaluated experimentally and the results demonstrate its applicability and feasibility.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences, Research area: Information security
Contributors: Silverajan, B., Vistiaho, P.
Number of pages: 8
Pages: 88-95
Publication date: 1 Aug 2019

Host publication information

Title of host publication: 2019 14th Asia Joint Conference on Information Security, AsiaJCIS 2019
Publisher: IEEE
ISBN (Electronic): 9781728125565
ASJC Scopus subject areas: Software, Information Systems and Management, Computer Networks and Communications, Safety, Risk, Reliability and Quality
Keywords: Cybersecurity incident exchange, Maritime cybersecurity, Smart ports, Smart ships

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

Web-user-interface system utilizing rhmei and open data for a water quality analyzer

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Software Engineering and Intelligent Systems, Pervasive Computing, Keio University, Japan, Global Environmental System Leaders Program, Keio University, Japan
Contributors: Sillberg, P., Veesommai, C., Soini, J., Jaakkola, H.
Number of pages: 8
Pages: 444-451
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
Publisher: Sirindhorn International Institute of Technology, Thammasat University, Thailand
Editors: Sornlertlamvanich, V., Chawakitchareon, P., Hansuebsai, A., Koopipat, C., Kiyoki, Y., Kangassalo, H., Thalheim, B., Yoshida, N.
ISBN (Electronic): 978-616-407-165-0

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

Toward Manageable Data Sources

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Software Engineering and Intelligent Systems, Pervasive Computing
Contributors: Sillberg, P.
Pages: 485-494
Publication date: Jun 2018

Host publication information

Title of host publication: EJC 2018 : Proceedings of the 28th International Conference on Information Modelling and Knowledge Bases
Publisher: Transport and Telecommunication Institute
Editors: Endrjukaite, T., Kangassalo, H., Thalheim, B., Kiyoki, Y.
ISBN (Electronic): 978-9984-818-89-4

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

Erosion testing of filled and/or reinforced vinyl ester composites in water medium at elevated temperature

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Materials Science, Research group: Plastics and Elastomer Technology, Outotec Research Center
Contributors: Siljander, S., Kiviniemi, M., Sarlin, E., Lindgren, M., Suihkonen, R., Vuorinen, J.
Number of pages: 10
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 20th International Conference on Composite Materials

Bibliographical note

ISBN kysytty, ei löydy / TL

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

The effect of physical adhesion promotion treatments on interfacial adhesion in cellulose-epoxy composite

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Materials Science, Research group: Plastics and Elastomer Technology, Research group: Paper Converting and Packaging
Contributors: Siljander, S., Lehmonen, J., Tanaka, A., Ketoja, J., Heikkilä, P., Lahti, J., Sarlin, E., Vuorinen, J.
Number of pages: 10
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 20th International Conference on Composite Materials

Bibliographical note

ISBN- tai ISSN-numeroa kysytty, ei löydy

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

Fault Tolerance of Digital Hydraulics in High Dynamic Hydraulic System

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Intelligent Hydraulics and Automation, Research group: Digital hydraulics, Robert Bosch GmbH, Germany, Tamlink ltd
Contributors: Siivonen, L., Linjama, M., Huova, M., Försterling, H., Stamm, E., Deubel, T.
Number of pages: 11
Publication date: 20 May 2015

Host publication information

Title of host publication: The Fourteenth Scandinavian International Conference on Fluid Power
Volume: 1
Place of publication: Tampere, Finland
Edition: 1
ISBN (Print): 978-952-15-3530-7
ISBN (Electronic): 978-952-15-3530-7

Bibliographical note

EXT="Siivonen, Lauri"

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

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

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

General information

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

Publication information

Journal: Advances in Science, Technology and Engineering Systems
Volume: 3
Issue number: 1
ISSN (Print): 2415-6698
Ratings: 
  • Scopus rating (2018): CiteScore 0 SNIP 0.297
Original language: English
ASJC Scopus subject areas: Engineering (miscellaneous), Management of Technology and Innovation, Physics and Astronomy (miscellaneous)
Keywords: 3D ray tracing, 5G, Microcellular, Millimeter wave frequencies, Multipath propagation, System performance
Source: Scopus
Source ID: 85061718805

Research output: Contribution to journalArticleScientificpeer-review

Enhanced outdoor to indoor propagation models and impact of different ray tracing approaches at higher frequencies

The main target of this article is to study the provision of indoor service (coverage) using outdoor base station at higher frequencies i.e. 10 GHz, 30 GHz and 60 GHz. In an outdoor to indoor propagation, an angular wall loss model is used in the General Building Penetration (GBP) model for estimating the additional loss at the intercept point of the building exterior wall. A novel angular wall loss model based on a separate incidence angle in azimuth and elevation plane is proposed in this paper. In the second part of this study, an Extended Building Penetration (EBP) model is proposed, and the performance of EBP model is compared with the GBP model. In EBP model, the additional fifth path known as the “Direct path” is proposed to be included in the GBP model. Based on the evaluation results, the impact of the direct path is found significant for the indoor users having the same or closed by height as that of the height of the transmitter. For the indoor users located far away from the exterior wall of building, a modified and enhanced approach of ray tracing type is proposed in this article. In the light of acquired simulation results, the impact of a modified ray tracing approach is emphasized.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Electrical Engineering, Research group: Laboratory of Radio Network Planning, Research group: Wireless Communications and Positioning, Ericsson Research
Contributors: Sheikh, M. U., Hiltunen, K., Lempiainen, J.
Number of pages: 11
Pages: 58-68
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Advances in Science, Technology and Engineering Systems
Volume: 3
Issue number: 2
ISSN (Print): 2415-6698
Ratings: 
  • Scopus rating (2018): CiteScore 0 SNIP 0.297
Original language: English
ASJC Scopus subject areas: Engineering (miscellaneous), Management of Technology and Innovation, Physics and Astronomy (miscellaneous)
Keywords: Angular loss, Building penetration loss, Outdoor to indoor, Propagation, Ray tracing, Wall loss model
Source: Scopus
Source ID: 85061801748

Research output: Contribution to journalArticleScientificpeer-review

Assessment of Coordinated Multipoint Transmission Modes for Indoor and Outdoor Users at 28 GHz in Urban Macrocellular Environment

The aim of this article is to analyze and evaluate the performance of Coordinated Multipoint (CoMP) transmission approach at a frequency of 28 GHz using three dimensional ray tracing simulations in an urban macrocellular environment. The new performance metric introduced in this article is the relative power usage. Other performance metrics examined in this article are received power, the Signal to Interference plus Noise Ratio (SINR), user throughput, relative throughput gain, and the percentage of overlapping area with multiple cells. Indoor and outdoor users are separately analyzed for few key performance indicators. Different cases of coordinated multipoint transmission i.e. intra-node and inter-node coordination is analyzed. The post analysis of the acquired simulation data shows that the use of CoMP functionality is more beneficial for the cell edge users compared with the other users in terms of improving the user’s experience. The throughput gain as well as the transmission overhead of the CoMP approach increases with the increase in number CoMP ports. Inter-node CoMP is much more power efficient and beneficial in comparison with the intra-node CoMP case.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Electrical Engineering, Research group: Laboratory of Radio Network Planning, Research group: Wireless Communications and Positioning, Aalto University
Contributors: Sheikh, M., Biswas, R., Lempiainen, J., Jantti, R.
Number of pages: 8
Pages: 119-126
Publication date: 16 Mar 2019
Peer-reviewed: Yes

Publication information

Journal: Advances in Science, Technology and Engineering Systems Journal (ASTESJ)
Volume: 4
Issue number: 2
ISSN (Print): 2415-6698
Ratings: 
  • Scopus rating (2019): CiteScore 0.6 SJR 0.139 SNIP 0.298
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Farm detection based on deep convolutional neural nets and semi-supervised green texture detection using VIS-NIR satellite image

Farm detection using low resolution satellite images is an important topic in digital agriculture. However, it has not received enough attention compared to high-resolution images. Although high resolution images are more efficient for detection of land cover components, the analysis of low-resolution images are yet important due to the low-resolution repositories of the past satellite images used for timeseries analysis, free availability and economic concerns. The current paper addresses the problem of farm detection using low resolution satellite images. In digital agriculture, farm detection has significant role for key applications such as crop yield monitoring. Two main categories of object detection strategies are studied and compared in this paper; First, a two-step semi-supervised methodology is developed using traditional manual feature extraction and modelling techniques; the developed methodology uses the Normalized Difference Moisture Index (NDMI), Grey Level Co-occurrence Matrix (GLCM), 2-D Discrete Cosine Transform (DCT) and morphological features and Support Vector Machine (SVM) for classifier modelling. In the second strategy, high-level features learnt from the massive filter banks of deep Convolutional Neural Networks (CNNs) are utilised. Transfer learning strategies are employed for pretrained Visual Geometry Group Network (VGG-16) networks. Results show the superiority of the high-level features for classification of farm regions.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Electrical Engineering, Coventry University
Contributors: Sharifzadeh, S., Tata, J., Tan, B.
Number of pages: 9
Pages: 100-108
Publication date: 2019

Host publication information

Title of host publication: DATA 2019 - Proceedings of the 8th International Conference on Data Science, Technology and Applications
Publisher: SCITEPRESS
Editors: Hammoudi, S., Quix, C., Bernardino, J.
ISBN (Electronic): 9789897583773
ASJC Scopus subject areas: Hardware and Architecture, Information Systems, Software, Computer Networks and Communications
Keywords: Classification, Convolutional Neural Nets (CNNs), Digital Agriculture, Satellite Image, Supervised Feature Extraction
Electronic versions: 

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

基于相位旋转的SCMA码本优化方法

To solve the high bit error ratio (BER) problem under the condition of high overload of sparse code multiple access (SCMA), the influence of phase rotation on the SCMA code is studied firstly. Two schemes of optimizing the phase rotation angle are then proposed based on the controlled-distance among the constellation points of synthetic constellation. The first scheme is called the rotation based on maximizing minimum euclidean distance (M-rotation) and the second is the rotation based on exponential average (E-rotation). E-rotation achieves better BER performance than M-rotation, but M-rotation is outstanding at the case of high signal-to-noise ratio (SNR). With respect to the decoding complexity, both schemes have no distinction but E-rotation gets better performance than M-rotation when the partial extrinsic information transmission of MPA (PEIT-MPA) is adopted.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Electronics and Communications Engineering, Chongqing University of Posts and Telecommunications, Huawei Technologies Co., Ltd.
Contributors: Shao, K., Zhou, B., Wang, G., Yu, B.
Number of pages: 9
Pages: 2354-2362
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics
Volume: 40
Issue number: 10
ISSN (Print): 1001-506X
Ratings: 
  • Scopus rating (2018): CiteScore 0.9 SJR 0.198 SNIP 0.478
Original language: Chinese
ASJC Scopus subject areas: Control and Systems Engineering, Electrical and Electronic Engineering
Keywords: Codebook design, Phase rotation, Sparse code multiple access (SCMA), Synthetic constellation
Source: Scopus
Source ID: 85056877151

Research output: Contribution to journalArticleScientificpeer-review

Platform Competences to Enhance Network Effects in Business Ecosystems

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Pori Department, Research group: Business Ecosystems, Networks and Innovations, Queensland University of Technology QUT, VTT Technical Research Centre of Finland
Contributors: Seppänen, M., Dedehayir, O., Still, K., Valkokari, K., Suominen, A.
Publication date: 8 Dec 2015

Host publication information

Title of host publication: 2015 ISPIM Innovation Summit in Brisbane, Australia - 6-9 December 2015
Publisher: International Society for Professional Innovation Management ISPIM
ISBN (Electronic): 978-1-911136-00-2

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

Towards automation security research and training environment

An automation system is a networked software product in hardware intensive environment and requires more than normal IT security skills. Building an automation security research and training environment for automation requires knowledge on the internal workings of an automation system as well as creative approach on how to keep the system secure where needed, and broken when required for development and teaching purposes. The main challenges are to combine the amount of automation specific hardware and to create good practices which keep the need for maintenance, versatility and pedagogical aspects in balance. This paper presents a project called TUTCyberLabs, the learned lessons and the design decisions. The main focus is on Department of Automation Science and Engineering environment ASECyberLab.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Automation Science and Engineering, Research area: Information Systems in Automation, Research area: Dynamic Systems, Department of Pervasive Computing, Research area: Information security, Department of Electrical Engineering, Research area: Power engineering, Ajeco Inc, VTT Technical Research Centre of Finland
Contributors: Seppälä, J., Salmenperä, M., Koivisto, H., Harju, J., Repo, S., Holmström, J., Ahonen, P.
Publication date: 18 Mar 2015

Host publication information

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

Publication series

Name: SAS Julkaisusarja
Publisher: Finnish Society of Automation
Volume: 44

Bibliographical note

ORG=ase,0.8
ORG=tie,0.1
ORG=dee,0.1

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

Impedanssipneumografia pienten lasten alahengitytiesoireiden selvittelyssä

General information

Publication status: Published
MoE publication type: D2 Article in professional manuals or guides or professional information systems or text book material
Organisations: Department of Electronics and Communications Engineering, Research group: Physiological Measurement Systems and Methods Group
Contributors: Seppä, V., Pelkonen, A. S., Kotaniemi-Syrjänen, A., Viik, J., Mäkelä, M. J., Malmberg, P.
Publication date: 2015

Host publication information

Title of host publication: Allergiatutkimussäätiön vuosikirja 2015

Publication series

Name: Allergiakoulu
Publisher: Allergiatutkimussäätiö
ISSN (Print): 1457-2508

Research output: Chapter in Book/Report/Conference proceedingChapterProfessional

Kuorielementtien kuivumisen mallintaminen hydrataation huomioivalla FEM-laskennalla

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Civil Engineering, Research group: Building Physics, Laboratory of Civil Engineering
Contributors: Sekki, P., Korhonen, L., Vinha, J.
Number of pages: 7
Pages: 399-405
Publication date: 24 Oct 2017

Host publication information

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

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikka. Rakennusfysiikka.
ASJC Scopus subject areas: Engineering(all)

Bibliographical note

INT=RAK, "Korhonen, Lauri"

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

2D Video Coding of Volumetric Video Data

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

General information

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

Host publication information

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

Bibliographical note

INT=sgn,"Sheikhi-Pour, Nahid"

Source: Scopus
Source ID: 85053915056

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

Compensation of PV generator output power fluctuations with energy storage systems

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

General information

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

Host publication information

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

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

JPEG Pleno: a standard framework for representing and signaling plenoptic modalities

In recent years, we have observed the advent of plenoptic modalities such as light fields, point clouds and holography in many devices and applications. Besides plenty of technical challenges brought by these new modalities, a particular challenge is arising at the horizon, namely providing interoperability between these devices and applications, and – in addition – at a cross-modality level. Based on these observations the JPEG committee (ISO/IEC JTC1/SC29/WG1 and ITU-T SG16) has initiated a new standardization initiative – JPEG Pleno – that is intended to define an efficient framework addressing the above interoperability issues. In this paper, an overview is provided about its current status and future plans.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Signal Processing, Research group: Signal Interpretation and Compression-SIC, Vrije Universiteit Brussel, Ostendo, Ecole Polytechnique Fédérale de Lausanne, Instituto Superior Tecnico, Lissabon, Portugal, University of Science and Technology of China
Contributors: Schelkens, P., Alpaslan, Z., Ebrahimi, T., Pereira, F., Pinheiro, A., Tabus, I., Chen, Z.
Number of pages: 10
Publication date: 2018

Host publication information

Title of host publication: SPIE Proceedings Volume 10752: Applications of Digital Image Processing XLI
Volume: 10752
Publisher: SPIE

Publication series

Name: SPIE Conference Proceedings
ISSN (Print): 0277-786X

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

JPEG Pleno light field coding technologies

JPEG Pleno provides a standard framework to facilitate the capture, representation, and exchange of light field, point cloud and holographic imaging modalities. JPEG Pleno Part 2 addresses coding of light field data. Two coding modes are supported for this modality. The first mode exploits the redundancy in this 4D data by utilizing a 4D transform technique, the second mode is based on 4D prediction. Both techniques are outlined in this paper as well as the file format that encapsulates the resulting codestreams.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Computing Sciences
Contributors: Schelkens, P., Astola, P., da Silva, E. A., Pagliari, C., Perra, C., Tabus, I., Watanabe, O.
Publication date: 6 Sep 2019

Host publication information

Title of host publication: Applications of Digital Image Processing XLII
Publisher: SPIE
Article number: 111371G
ISBN (Electronic): 9781510629677

Publication series

Name: Proceedings of SPIE
Volume: 11137
ISSN (Print): 0277-786X
ISSN (Electronic): 1996-756X

Bibliographical note

jufoid=71479

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

Stirring the Construction Project Management with Co-creation and Continuous Improvement

Abstract Gathering information that is capable to explain customers’ needs is usually seen as a quite straightforward part of the traditional construction process: a customer should be able to tell all relevant needs in the first stage so that a building could be designed and built according to the gained information. But the process is lacking of service abilities if a customer wants to modify the given information due to a change in circumstances, albeit such a change is easily caused due turbulent economic situations and long spans in real-estate development projects. Hence the customer perspective regarding the construction management (CM) process should be accommodated better. In this paper, the case studies of the four premises improvement projects are reported upon, where the CM process was altered to include and apply the concepts of continuous improvement and co-creation. The process documentation covered the impacts of the case project on the usability of the premises, the indoor climate conditions (carbon dioxide and temperature) metering, the time lapse cameras and the on-line user feedback system. The documentation consists of the minutes of the meetings, the financial reporting and the time tables.Both the processes and the results of the projects are analysed. Based on the key findings, some suggestions are put forth upon how to improve the CM process to better serve customer interests and quality improvement in the future.

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, School of Architecture
Contributors: Savolainen, J., Kähkönen, K., Niemi, O., Poutanen, J., Varis, E.
Number of pages: 8
Pages: 64-71
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
Keywords: Co-creation, construction management, continuous improvement, customer relations management, quality management

Bibliographical note

ORG=rak,1
ORG=ark,0

Source: RIS
Source ID: urn:76EF98A938A43DE456AFD5111BF4116C

Research output: Contribution to journalArticleScientificpeer-review

Tailoring directional scattering of second-harmonic generation from (111)-GaAs nanoantennas

The group of zincblende III-V compound semiconductors, especially (100)-grown AlGaAs and GaAs, have recently been presented as promising materials for second harmonic generation (SHG) at the nanoscale. However, major obstacles to push the technology towards practical applications are the limited control over directionality of the SH emission and especially zero forward/backward radiation. In this work we provide both theoretically and experimentally a solution to these problems by presenting the first SHG nanoantennas made from (111)-GaAs embedded in a low index material. These nanoantennas show superior forward directionality compared to their (100)-counterparts. Most importantly, it is possible to manipulate the SHG radiation pattern of the nanoantennas by changing the pump polarization without affecting the linear properties and the total nonlinear conversion efficiency.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Nonlinear Optics, Physics, Australian National University, Friedrich-Schiller-University Jena, School of Engineering and Information Technology, University of New South Wales (UNSW) Australia, Institute of Applied Physics of the Russian Academy of Sciences
Contributors: Sautter, J., Xu, L., Miroshnichenko, A., Lysevych, M., Volkovskaya, I., Smirnova, D., Camacho Morales, M., Zangeneh Kamali, K., Karouta, F., Vora, K., Tan, H. H., Kauranen, M., Staude, I., Jagadish, C., Neshev, D. N., Rahmani, M.
Publication date: 2019

Host publication information

Title of host publication: AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
Publisher: SPIE
Editors: Mitchell, A., Rubinsztein-Dunlop, H.
Article number: 112000H
ISBN (Electronic): 9781510631403

Publication series

Name: Proceedings of SPIE - The International Society for Optical Engineering
Volume: 11200
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: Dielectric nanoantennas, Directional emission, Multipolar interference, Second harmonic generation

Bibliographical note

jufoid=71479

Source: Scopus
Source ID: 85079653740

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

Management accounting in managerial work: engaging facts and feelings in decision making

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Industrial Management, Research group: Cost Management Center
Contributors: Saukkonen, N., Laine, T., Suomala, P.
Publication date: 15 Jun 2016

Host publication information

Title of host publication: Proceedings of the Manufacturing Accounting Research Conference 2016 : Lisbon, Portugal, June 15-17, 2016
Publisher: European Institute for Advanced Studies in Management EIASM

Publication series

Name: 
ISSN (Print): 2295-1709
Name: Proceedings of the Manufacturing Accounting Research Conference

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

Studies of Physical Phase State of Aerosol Nanoparticles

Aerosol particles produced in the atmosphere have major effects on the life on Earth: cloud formation starts on seed particles, often formed by photochemical oxidation of biogenic volatile organic compounds; visibility, corrosion, and health problems are caused by anthropogenic hydrocarbon and sulfur emission processed into particles by the atmosphere and the sun.

Naturally occurring secondary organic aerosol (SOA) particles can produce up to a half of the non-refractory mass of aerosol particles of less than micrometer in size. This makes SOA a large contributing factor to the climate system of the Earth. The actual effect that these particles have is, however, not well known, compared to the other effects affecting the climate. The research effort to increase the understanding and reduce the uncertainties around the climate effects of SOA encompasses an interdisciplinary research community.

The recent advance made by the observation of a solid phase of SOA by Virtanen et al. (2010) was the starting point for this thesis. The solid phase of SOA particles means that a long-held assumption of a partition equilibrium between the condensed phase and the gas phase of the semivolatile species may be wrong and produce too low a timescale for the particle chemical reaction rates and uptake coefficients.

This work consists of new developments in the instrumentation of particle properties as well as new observations of laboratory-generated secondary organic aerosol. The method development has two branches, one concentrates on finding more information from the measurement signal of an electrical low pressure impactor (ELPI) used in a somewhat unconventional way, whereas the other consists of a new detection method for particle bounce and response to different humidity and phase hysteresis induced by a carefully controlled humidity history.

The methods and observations made during this work are by no means the final word on the subject, but they are being used and further developed by the scientific community. Study of the particle phase and bounce as well as SOA mechanical properties and kinetics is well underway, and its results will be used to further refine the understanding of both aerosol fundamentals as well as the climate system.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Physics, Research area: Aerosol Physics
Contributors: Saukko, E.
Number of pages: 51
Publication date: 26 Jun 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3544-4
ISBN (Electronic): 978-952-15-3608-3
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1308
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Development of chip-surface stimulus electrode array for fully-implantable subretinal prosthesis chip

In this study, we have developed a chip-surface stimulus electrode array for fully-implantable subretinal prosthesis chip. To realize visual restoration with high resolution, stimulus electrodes should be miniaturized and arrayed with high density. When we miniaturize them, however, their electrochemical impedances become higher and their amount of charge injection become smaller. Additionally, as the number of electrodes increases, it becomes difficult to make electrical connection to each pixel of the retinal prosthesis chip and each electrode by electrical wiring. To overcome these problems, we have developed the stimulus electrodes that have low electrochemical impedances and large charge injection capacities, and established a fabrication process of chip-surface stimulus electrode array. We fabricated the stimulus electrodes made of extremely porous platinum which had large-surface-area compared with conventional Pt. We also fabricated the chip-surface stimulus electrodes array on the subretinal prosthesis chip which surface was rough and covered with insulator film.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Electronics and Communications Engineering, Research group: Biomaterials and Tissue Engineering Group, BioMediTech, Integrated Technologies for Tissue Engineering Research (ITTE), International Graduate School in Biomedical Engineering and Medical Physics (Ministry of Education in Finland), Graduate School of Engineering, Tohoku University
Contributors: Sasaki, Y., Suzuki, T., Iwagami, T., Tani, T., Naganuma, H., Kino, H., Hyttinen, J., Kellomäki, M., Tanaka, T.
Pages: O-253-O-254
Publication date: 17 Aug 2014
Peer-reviewed: Yes

Publication information

Journal: Transactions of Japanese Society for Medical and Biological Engineering
Volume: 52
ISSN (Print): 1347-443X
Ratings: 
  • Scopus rating (2014): CiteScore 0.1 SJR 0.127 SNIP 0.038
Original language: English
ASJC Scopus subject areas: Biomedical Engineering
Keywords: Electrode, Extremely porous platinum, Retinal prosthesis
Source: Scopus
Source ID: 84939439184

Research output: Contribution to journalArticleScientificpeer-review

Kids Out! Urban environments and physical activity among children and adolescents

General information

Publication status: Published
MoE publication type: Not Eligible
Organisations: School of Architecture, Research group: EDGE
Contributors: Sarjala, S.
Number of pages: 1
Publication date: 26 Feb 2013

Host publication information

Title of host publication: 2013 Active Living Research (ALR) Annual Conference in San Diego, CA

Bibliographical note

xabstract

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

Organic Chromophores in Self-Assembled Monolayers and Supramolecular Arrays

Large aromatic chromophores, e.g. phthalocyanines or perylene derivatives are widely used in modern photonic applications. For these systems, well-organized films of the chromophores are very important. One of the ways to ensure the order on molecular level is to bind the organic dyes covalently to a solid substrate with a suitable anchor group. Expanding the concept, multilayered supramolecular assemblies can be built on surfaces as well.

In the present Thesis various chromophores with a capability to anchor onto a solid surface were prepared. Synthesized molecules were porphyrins, phthalocyanines, and perylene mono- and diimides with different substituents. The anchor-surface pairs were of several types, and the chromophores were attached to a surface by one- or two-step methods.

Two of the perylene monoimide derivatives were found to be a perfect basement for construction of multilayered films. Using a metal-ligand interaction it was possible to prepare stable double layers, as well ten molecules thick stable deeply colored multilayer films. The developed approach is versatile and will allow in future to expand the capabilities of molecular film architecture.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry
Contributors: Sariola-Leikas, E.
Number of pages: 58
Publication date: 20 Nov 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3600-7
ISBN (Electronic): 978-952-15-3623-6
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1334
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology
Versio ok 16.12.2015

Research output: Book/ReportDoctoral thesisCollection of Articles

Emergence of relationship triads in construction project networks

Research is increasingly addressing attention to project networks, in terms of inter-organizational relationships. Very often, research is focused on customers and contractors at the center of the project networks and their strong dyadic relationships. Less attention has been paid to the non-central actors and triadic relationships, which might have significant role in project delivery and in the construction innovations. This research focuses on the emergence of relationship triad between contractor, supplier and designer. The goal of this research is to identify contractors’ motives to engage in triadic relationship, and practices to adopt contractor-supplier-designer triads in the construction project networks. Qualitative, exploratory research strategy is employed in the context of construction project networks, with contractors as adopters of relationship triads. Interviews are conducted with contractors, to discover the specifics of contractor-supplier-designer relationship triads in construction projects. The results indicate that contractors are motivated to enhance their dyadic relationships with suppliers and designer, but they are also motivated and capable to adopt triadic relationships with these actors. The research contributes by showing that relationship triads promote development and innovations in construction projects. As key contributions, this research suggests practices and project conditions through which beneficial relationship triads can be adopted.

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: Sariola, R.
Number of pages: 13
Pages: 1-13
Publication date: 2015

Host publication information

Title of host publication: 23rd Nordic Academy of Management conference, NFF, 12-14 August 2015, Copenhagen, Denmark
Place of publication: Copenhagen, Denmark
Publisher: Nordic Academy of Management

Publication series

Name: Nordic Academy of Management Conference

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

Enhancing the supplier’s third-party relationships in construction projects

Project delivery involves networks of customers, contractors, suppliers, and various third parties. Previous research has focused on contractual relationships in the direct supply chains, with less attention to third parties and non-contractual relationships. This study develops and tests a framework of relationship strength and its antecedents in the non-contractual relationship of component suppliers and designers as third parties. The intent is to identify factors relevant to enhancing the supplier’s third party relationships. The results reveal the supplier’s activeness and technical capability as antecedents to trust, and supplier’s technical capability and supplier-designer cooperation outside projects as antecedents to commitment.

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: Sariola, R., Martinsuo, M.
Number of pages: 21
Publication date: Jun 2015

Host publication information

Title of host publication: The Bartlett IRNOP 2015 : International Research Network on Organizing by Projects Conference
Publisher: IRNOP
Keywords: project networks, supplier relationships, relationship strength

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

icellfusion: Tool for fusion and analysis of live-cell images from time-lapse multimodal microscopy

Temporal, multimodal microscopy imaging of live cells is becoming widely used in studies of cellular processes. In general, temporal sequences of images with functional and morphological data from live cells are acquired using multiple image sensors. The images from the different sources usually differ in resolution and have non-coincident fields of view, making the merging process complex. We present a new tool - iCellFusion - that performs data fusion of images from Phase-Contrast Microscopy and Fluorescence Microscopy in order to correlate the information on cell morphology, lineage and functionality. Prior to image fusion, iCellFusion performs automatic or computer-aided cell segmentation and establishes cell lineages. We exemplify its usage on time-lapse, multimodal microscopy images of bacteria producing fluorescent spots. We expect iCellFusion to assist research in Cell and Molecular Biology and the healthcare sector, where live-cell imaging is an increasingly important technique to detect and study diseases at the cellular level.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Signal Processing, Research group: Laboratory of Biosystem Dynamics-LBD, Instituto de Desenvolvimento de Novas Tecnologias
Contributors: Santinha, J., Gupta, A., Martins, L., Annila, T., Häkkinen, A., Mora, A., Lloyd-Price, J., Ribeiro, A., Oliveira, S. M. D., Fonseca, J. R.
Number of pages: 29
Pages: 806-834
Publication date: 30 Aug 2016

Host publication information

Title of host publication: Biometrics: Concepts, Methodologies, Tools, and Applications
Publisher: IGI Global
ISBN (Print): 9781522509837
ISBN (Electronic): 9781522509844
ASJC Scopus subject areas: Computer Science(all)
Source: Scopus
Source ID: 85015879219

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

How is it sustainable? Identifying key indicators for sustainable educational design

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Sandström, N., Hytti, V., Nenonen, S., Lonka, K.
Number of pages: 3
Pages: 4217-4219
Publication date: 2016

Host publication information

Title of host publication: 10th INTED 2016 Conference Proceedings : 7-9 March, 2016, Valencia, Spain
Editors: Gómes Chova, L., López Martínez, A., Candel Torres, I.
ISBN (Electronic): 978-84-608-5617-7

Publication series

Name: INTED proceedings
ISSN (Electronic): 2340-1079
Keywords: 516 Educational sciences
DOIs: