Contribution: organisation=ase,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2015-01-09

Publisher name: Elsevier

publication_forum:67104 PY - 2015/6 Y1 - 2015/6 N2 - The Bayesian smoothing equations are generally intractable for systems described by nonlinear stochastic differential equations and discrete-time measurements. Gaussian approximations are a computationally efficient way to approximate the true smoothing distribution. In this work, we present a comparison between two Gaussian approximation methods. The Gaussian filtering based Gaussian smoother uses a Gaussian approximation for the filtering distribution to form an approximation for the smoothing distribution. The variational Gaussian smoother is based on minimizing the Kullback-Leibler divergence of the approximate smoothing distribution with respect to the true distribution. The results suggest that for highly nonlinear systems, the variational Gaussian smoother can be used to iteratively improve the Gaussian filtering based smoothing solution. We also present linearization and sigma-point methods to approximate the intractable Gaussian expectations in the variational Gaussian smoothing equations. In addition, we extend the variational Gaussian smoother for certain class of systems with singular diffusion matrix. AB - The Bayesian smoothing equations are generally intractable for systems described by nonlinear stochastic differential equations and discrete-time measurements. Gaussian approximations are a computationally efficient way to approximate the true smoothing distribution. In this work, we present a comparison between two Gaussian approximation methods. The Gaussian filtering based Gaussian smoother uses a Gaussian approximation for the filtering distribution to form an approximation for the smoothing distribution. The variational Gaussian smoother is based on minimizing the Kullback-Leibler divergence of the approximate smoothing distribution with respect to the true distribution. The results suggest that for highly nonlinear systems, the variational Gaussian smoother can be used to iteratively improve the Gaussian filtering based smoothing solution. We also present linearization and sigma-point methods to approximate the intractable Gaussian expectations in the variational Gaussian smoothing equations. In addition, we extend the variational Gaussian smoother for certain class of systems with singular diffusion matrix. U2 - 10.1016/j.sigpro.2014.12.013 DO - 10.1016/j.sigpro.2014.12.013 M3 - Article VL - 111 SP - 124 EP - 136 JO - Signal Processing JF - Signal Processing SN - 0165-1684 ER - TY - JOUR T1 - Fundamental solution of k-hyperbolic harmonic functions in odd spaces AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki PY - 2015/4/13 Y1 - 2015/4/13 N2 - We study k-hyperbolic harmonic functions in the upper half space . The operator is the Laplace-Beltrami operator with respect to the Riemannian metric . In case k = n - 1 the Riemannian metric is the hyperbolic distance of Poincare upper half space. The proposed functions are connected to the axially symmetric potentials studied notably by Weinstein, Huber and Leutwiler. We present the fundamental solution in case n is even using the hyperbolic metric. The main tool is the transformation of k-hyperbolic harmonic functions to eigenfunctions of the hyperbolic Laplace operator. AB - We study k-hyperbolic harmonic functions in the upper half space . The operator is the Laplace-Beltrami operator with respect to the Riemannian metric . In case k = n - 1 the Riemannian metric is the hyperbolic distance of Poincare upper half space. The proposed functions are connected to the axially symmetric potentials studied notably by Weinstein, Huber and Leutwiler. We present the fundamental solution in case n is even using the hyperbolic metric. The main tool is the transformation of k-hyperbolic harmonic functions to eigenfunctions of the hyperbolic Laplace operator. UR - http://www.scopus.com/inward/record.url?scp=84928019119&partnerID=8YFLogxK U2 - 10.1088/1742-6596/597/1/012034 DO - 10.1088/1742-6596/597/1/012034 M3 - Article VL - 597 JO - Journal of Physics: Conference Series JF - Journal of Physics: Conference Series SN - 1742-6588 IS - 1 M1 - 012034 ER - TY - JOUR T1 - ADAM T2 - A general method for using various data types in asteroid reconstruction AU - Viikinkoski, Matti AU - Kaasalainen, Mikko AU - Durech, Josef PY - 2015/4/1 Y1 - 2015/4/1 N2 - We introduce ADAM, the All-Data Asteroid Modelling algorithm. ADAM is simple and universal since it handles all disk-resolved data types (adaptive optics or other images, interferometry, and range-Doppler radar data) in a uniform manner via the 2D Fourier transform, enabling fast convergence in model optimization. The resolved data can be combined with disk-integrated data (photometry). In the reconstruction process, the difference between each data type is only a few code lines defining the particular generalized projection from 3D onto a 2D image plane. Occultation timings can be included as sparse silhouettes, and thermal infrared data are efficiently handled with an approximate algorithm that is sufficient in practice because of the dominance of the high-contrast (boundary) pixels over the low-contrast (interior) pixels. This is of particular importance to the raw ALMA data that can be directly handled by ADAM without having to construct the standard image. We study the reliability of the inversion, using the independent shape supports of function series and control-point surfaces. When other data are lacking, one can carry out fast non-convex lightcurve-only inversions, but any shape models resulting from it should only be taken as illustrative large-scale models. AB - We introduce ADAM, the All-Data Asteroid Modelling algorithm. ADAM is simple and universal since it handles all disk-resolved data types (adaptive optics or other images, interferometry, and range-Doppler radar data) in a uniform manner via the 2D Fourier transform, enabling fast convergence in model optimization. The resolved data can be combined with disk-integrated data (photometry). In the reconstruction process, the difference between each data type is only a few code lines defining the particular generalized projection from 3D onto a 2D image plane. Occultation timings can be included as sparse silhouettes, and thermal infrared data are efficiently handled with an approximate algorithm that is sufficient in practice because of the dominance of the high-contrast (boundary) pixels over the low-contrast (interior) pixels. This is of particular importance to the raw ALMA data that can be directly handled by ADAM without having to construct the standard image. We study the reliability of the inversion, using the independent shape supports of function series and control-point surfaces. When other data are lacking, one can carry out fast non-convex lightcurve-only inversions, but any shape models resulting from it should only be taken as illustrative large-scale models. KW - Methods: analytical KW - Methods: numerical KW - Minor planets, asteroids: general KW - Minor planets, asteroids: individual: 2000 ET70 KW - Minor planets, asteroids: individual: Daphne UR - http://www.scopus.com/inward/record.url?scp=84925251323&partnerID=8YFLogxK U2 - 10.1051/0004-6361/201425259 DO - 10.1051/0004-6361/201425259 M3 - Article VL - 576 JO - Astronomy and Astrophysics JF - Astronomy and Astrophysics SN - 0004-6361 M1 - A8 ER - TY - GEN T1 - On improvement of transient stage of composite nonlinear feedback control using arbitrary order set point filters AU - Pyrhönen, Veli-Pekka AU - Koivisto, Hannu PY - 2015/4/1 Y1 - 2015/4/1 N2 - This paper studies the generalization of composite nonlinear feedback (CNF) control using arbitrary order set point filters, which focus on the initial stage of the transient response. The set point filters can be used to provide more performance by shortening the rise and settling times of the control system. Furthermore, the filters operate outside the feedback loop, and hence, they do not sacrifice loop robustness. The new method is illustrated by a benchmark problem found in an open literature. The simulation results show that the proposed method improves the set point response more than 10% in terms of settling time. AB - This paper studies the generalization of composite nonlinear feedback (CNF) control using arbitrary order set point filters, which focus on the initial stage of the transient response. The set point filters can be used to provide more performance by shortening the rise and settling times of the control system. Furthermore, the filters operate outside the feedback loop, and hence, they do not sacrifice loop robustness. The new method is illustrated by a benchmark problem found in an open literature. The simulation results show that the proposed method improves the set point response more than 10% in terms of settling time. KW - Composite nonlinear feedback KW - actuator saturation KW - high performance KW - robust control KW - set point filter KW - control system synthesis KW - feedback KW - nonlinear control systems KW - transient response U2 - 10.1109/ICCSCE.2014.7072705 DO - 10.1109/ICCSCE.2014.7072705 M3 - Conference contribution SN - 978-1-4799-5685-2 SP - 147 EP - 152 BT - 2014 IEEE International Conference on Control System, Computing and Engineering (ICCSCE) PB - Institute of Electrical and Electronics Engineers IEEE ER - TY - GEN T1 - Composite Nonlinear Feedback Control of a Chemical Reactor AU - Pyrhönen, Veli-Pekka AU - Koivisto, Hannu PY - 2015/3/18 Y1 - 2015/3/18 N2 - This paper studies the application of composite nonlinear feedback (CNF) control for a continuous time stirred tank reactor. Inside the reactor, an exothermic chemical reaction occurs, which requires cooling when concentration is commanded from low to high conversion rate to prevent a thermal runaway. A full-state CNF controller is designed for adjusting the temperature of the cooling jacket using concentration and temperature measurements. A continuous time gain-scheduled cascade controller, as well as a model predictive controller (MPC) is also fabricated for comparison. The gain-scheduled cascade controller has a proportional-integral (PI) controller as a primary loop controller, and a P-controller as a secondary loop controller. The simulation results show that the CNF controller is able to offer the best overall tracking performance as measured by the integral-of-absolute-error (IAE) criterion. In addition, the CNF controller does not need gain-scheduling for tuning purposes; the CNF controller is capable of changing its tuning as a function of control error only. AB - This paper studies the application of composite nonlinear feedback (CNF) control for a continuous time stirred tank reactor. Inside the reactor, an exothermic chemical reaction occurs, which requires cooling when concentration is commanded from low to high conversion rate to prevent a thermal runaway. A full-state CNF controller is designed for adjusting the temperature of the cooling jacket using concentration and temperature measurements. A continuous time gain-scheduled cascade controller, as well as a model predictive controller (MPC) is also fabricated for comparison. The gain-scheduled cascade controller has a proportional-integral (PI) controller as a primary loop controller, and a P-controller as a secondary loop controller. The simulation results show that the CNF controller is able to offer the best overall tracking performance as measured by the integral-of-absolute-error (IAE) criterion. In addition, the CNF controller does not need gain-scheduling for tuning purposes; the CNF controller is capable of changing its tuning as a function of control error only. KW - exothermic reaction KW - nonlinear control KW - nonlinear dynamics KW - cascade control M3 - Conference contribution T3 - SAS julkaisusarja BT - Proceedings of AutomaatioXXI, The Industrial Revolution of Internet – From Intelligent Devices to Networked Intelligence PB - Suomen Automaatioseura ry CY - Helsinki, Finland ER - TY - JOUR T1 - Projektioppiminen T2 - lähtökohtana ympäröivä maailma AU - Eriksson, Sirkka-Liisa AU - Viro, Elina PY - 2015/3/11 Y1 - 2015/3/11 N2 - Oppilaat tarvitsevat matematiikkaa arjessa ja tulevassa työelämässä, ei vain matematiikan tunneilla. Projektioppiminen-kehittämishankeen tarkoituksena on lisätä yläkouluikäisten oppilaiden motivaatiota matematiikkaa kohtaan ja luoda samalla matematiikkainnostusta. AB - Oppilaat tarvitsevat matematiikkaa arjessa ja tulevassa työelämässä, ei vain matematiikan tunneilla. Projektioppiminen-kehittämishankeen tarkoituksena on lisätä yläkouluikäisten oppilaiden motivaatiota matematiikkaa kohtaan ja luoda samalla matematiikkainnostusta. KW - Projektioppiminen KW - matematiikan opetus M3 - Article JO - LUMA-sanomat JF - LUMA-sanomat SN - 1799-3385 ER - TY - JOUR T1 - Tampereen matemaattisten aineiden aineenopettajakoulutus AU - Eriksson, Sirkka-Liisa AU - Haukkanen, Pentti AU - Hukka, Terttu I. AU - Lemmetyinen, Helge N1 - ORG=mat,0.7 ORG=keb,0.3 PY - 2015/3/11 Y1 - 2015/3/11 N2 - Esittelemme tässä artikkelissa yleisesti Tampereen yliopistojen aineenopettajakoulutusta. Aineenopettajakoulutuksessa on Tampereen yliopiston ja Tampereen teknillisen yliopiston välillä paljon yhteistä toimintaa. Kerromme Tampereen aineenopettajakoulutuksen taustasta. Tämän jälkeen kuvaamme opetuksen tärkeimpiä piirteitä kummastakin yliopistosta erikseen ja sen jälkeen kokoamme esityksen yhteisesti toteutettavasta osioista. Lopuksi esittelemme opetukseen liittyvää kehitystoimintaa ja tutkimusta. AB - Esittelemme tässä artikkelissa yleisesti Tampereen yliopistojen aineenopettajakoulutusta. Aineenopettajakoulutuksessa on Tampereen yliopiston ja Tampereen teknillisen yliopiston välillä paljon yhteistä toimintaa. Kerromme Tampereen aineenopettajakoulutuksen taustasta. Tämän jälkeen kuvaamme opetuksen tärkeimpiä piirteitä kummastakin yliopistosta erikseen ja sen jälkeen kokoamme esityksen yhteisesti toteutettavasta osioista. Lopuksi esittelemme opetukseen liittyvää kehitystoimintaa ja tutkimusta. M3 - Article VL - 3 SP - 800 EP - 807 JO - LUMAT: International Journal on Math, Science and Technology Education JF - LUMAT: International Journal on Math, Science and Technology Education SN - 2323-7112 IS - 6 ER - TY - GEN T1 - Generalized hyperbolic harmonic functions in the plane AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki AU - Vuojamo, Vesa PY - 2015/3/10 Y1 - 2015/3/10 N2 - We consider solutions of the equation yΔh (x,y)-k ah/ay=0 in the plane. These functions already have been investigated by Weinstein around 1950 in connection of generalized axially symmetric potential theory. We have found several results concerning these type of functions, called k-hyperbolic harmonic functions, in higher dimensions. In this paper, we show in the plane case that it is possible to compute the explicit fundamental solutions in terms of the hyperbolic metric. These results may be used to find fundamental solutions in all even dimensional spaces. The key tools are the transformation properties of hyperbolic metric of the Poincaré upper half space model. AB - We consider solutions of the equation yΔh (x,y)-k ah/ay=0 in the plane. These functions already have been investigated by Weinstein around 1950 in connection of generalized axially symmetric potential theory. We have found several results concerning these type of functions, called k-hyperbolic harmonic functions, in higher dimensions. In this paper, we show in the plane case that it is possible to compute the explicit fundamental solutions in terms of the hyperbolic metric. These results may be used to find fundamental solutions in all even dimensional spaces. The key tools are the transformation properties of hyperbolic metric of the Poincaré upper half space model. KW - axially symmetric KW - fundamental solution KW - Hyperbolic KW - Laplace-Beltrami U2 - 10.1063/1.4912658 DO - 10.1063/1.4912658 M3 - Conference contribution SN - 9780735412873 VL - 1648 BT - Proceedings of the International Conference on Numerical Analysis and Applied Mathematics 2014 (ICNAAM-2014) PB - American Institute of Physics Inc. ER - TY - JOUR T1 - Multi-stable dynamics of the non-adiabatic repressilator AU - Potapov, Ilya AU - Zhurov, Boris AU - Volkov, Evgeny PY - 2015/3/6 Y1 - 2015/3/6 N2 - The assumption of the fast binding of transcription factors (TFs) to promoters is a typical point in studies of synthetic genetic circuits functioning in bacteria. Although the assumption is effective for simplifying the models, it becomes questionable in the light of in vivo measurements of the times TF spends searching for its cognate DNA sites. We investigated the dynamics of the full idealized model of the paradigmatic genetic oscillator, the repressilator, using deterministic mathematical modelling and stochastic simulations. We found (using experimentally approved parameter values) that decreases in the TF binding rate changes the type of transition between steady state and oscillation. As a result, this gives rise to the hysteresis region in the parameter space, where both the steady state and the oscillation coexist. We further show that the hysteresis is persistent over a considerable range of the parameter values, but the presence of the oscillations is limited by the low rate of TF dimer degradation. Finally, the stochastic simulation of the model confirms the hysteresis with switching between the two attractors, resulting in highly skewed period distributions. Moreover, intrinsic noise stipulates trains of large-amplitude modulations around the stable steady state outside the hysteresis region, which makes the period distributions bimodal. AB - The assumption of the fast binding of transcription factors (TFs) to promoters is a typical point in studies of synthetic genetic circuits functioning in bacteria. Although the assumption is effective for simplifying the models, it becomes questionable in the light of in vivo measurements of the times TF spends searching for its cognate DNA sites. We investigated the dynamics of the full idealized model of the paradigmatic genetic oscillator, the repressilator, using deterministic mathematical modelling and stochastic simulations. We found (using experimentally approved parameter values) that decreases in the TF binding rate changes the type of transition between steady state and oscillation. As a result, this gives rise to the hysteresis region in the parameter space, where both the steady state and the oscillation coexist. We further show that the hysteresis is persistent over a considerable range of the parameter values, but the presence of the oscillations is limited by the low rate of TF dimer degradation. Finally, the stochastic simulation of the model confirms the hysteresis with switching between the two attractors, resulting in highly skewed period distributions. Moreover, intrinsic noise stipulates trains of large-amplitude modulations around the stable steady state outside the hysteresis region, which makes the period distributions bimodal. KW - Adiabatic KW - Bimodality KW - Genetic oscillator KW - Hysteresis KW - Multi-stability UR - http://www.scopus.com/inward/record.url?scp=84923240824&partnerID=8YFLogxK U2 - 10.1098/rsif.2014.1315 DO - 10.1098/rsif.2014.1315 M3 - Article VL - 12 JO - Journal of the Royal Society. Interface JF - Journal of the Royal Society. Interface SN - 1742-5689 IS - 104 M1 - 20141315 ER - TY - JOUR T1 - Designing controllers with reduced order internal models AU - Paunonen, Lassi PY - 2015/3/1 Y1 - 2015/3/1 N2 - In this technical note we study robust output tracking for autonomous linear systems. We introduce a new approach to designing robust controllers using a recent observation that a full internal model is not always necessary for robustness. Especially this may be the case if the control law is only required to be robust with respect to a specific predetermined class of uncertainties in the parameters of the plant. The results are illustrated with an example on robust output tracking for coupled harmonic oscillators. AB - In this technical note we study robust output tracking for autonomous linear systems. We introduce a new approach to designing robust controllers using a recent observation that a full internal model is not always necessary for robustness. Especially this may be the case if the control law is only required to be robust with respect to a specific predetermined class of uncertainties in the parameters of the plant. The results are illustrated with an example on robust output tracking for coupled harmonic oscillators. UR - http://www.scopus.com/inward/record.url?scp=84923355671&partnerID=8YFLogxK U2 - 10.1109/TAC.2014.2329212 DO - 10.1109/TAC.2014.2329212 M3 - Article VL - 60 SP - 775 EP - 780 JO - IEEE Transactions on Automatic Control JF - IEEE Transactions on Automatic Control SN - 0018-9286 IS - 3 M1 - 6826480 ER - TY - GEN T1 - Semantic Labeling of Places based on Phone Usage Features using Supervised Learning AU - Rivero Rodriguez, Alejandro AU - Leppäkoski, Helena AU - Piché, Robert N1 - ORG=mat,0.6 ORG=ase,0.4 Portfolio EDEND: 2015-01-14

publication_forum:72750 PY - 2015/2/5 Y1 - 2015/2/5 N2 - Nowadays mobile applications demand higher context awareness. The applications aim to understand the user's context (e.g., home or at work) and provide services tailored to the users. The algorithms responsible for inferring the user's context are the so-called context inference algorithms, the place detection being a particular case. Our hypothesis is that people use mobile phones differently when they are located in different places (e.g. longer calls at home than at work). Therefore, the usage of the mobile phones could be an indicator of the users' current context. The objective of the work is to develop a system that can estimate the user's place label (home, work, etc.), based on phone usage. As training and validation set, we use a database containing phone usage information of 200 users over several months including phone call and SMS logs, multimedia usage, accelerometer, GPS, network information and system information. The data was split into visits, i.e., periods of uninterrupted time that the user has been in a certain place (Home, Work, Leisure, etc.). The data include information about the phone usage during the visits, and the semantic label of the place visited (Home, Work, etc.). We consider two approaches to represent this data: the first approach (so-called visits approach) saves each visit separately; the second approach (so-called places approach) combines all visits of one user to a certain place and creates place-specific information. For place detection, we used five popular classification methods, Naïve Bayes, Decision Tree, Bagged Tree, Neural Network and K-Nearest Neighbors, in both representation approaches. We evaluated their classification rates and found that: 1) Bagged Tree outperforms the other methods; 2) the places data-representation gives better results than the visits data-representation. AB - Nowadays mobile applications demand higher context awareness. The applications aim to understand the user's context (e.g., home or at work) and provide services tailored to the users. The algorithms responsible for inferring the user's context are the so-called context inference algorithms, the place detection being a particular case. Our hypothesis is that people use mobile phones differently when they are located in different places (e.g. longer calls at home than at work). Therefore, the usage of the mobile phones could be an indicator of the users' current context. The objective of the work is to develop a system that can estimate the user's place label (home, work, etc.), based on phone usage. As training and validation set, we use a database containing phone usage information of 200 users over several months including phone call and SMS logs, multimedia usage, accelerometer, GPS, network information and system information. The data was split into visits, i.e., periods of uninterrupted time that the user has been in a certain place (Home, Work, Leisure, etc.). The data include information about the phone usage during the visits, and the semantic label of the place visited (Home, Work, etc.). We consider two approaches to represent this data: the first approach (so-called visits approach) saves each visit separately; the second approach (so-called places approach) combines all visits of one user to a certain place and creates place-specific information. For place detection, we used five popular classification methods, Naïve Bayes, Decision Tree, Bagged Tree, Neural Network and K-Nearest Neighbors, in both representation approaches. We evaluated their classification rates and found that: 1) Bagged Tree outperforms the other methods; 2) the places data-representation gives better results than the visits data-representation. KW - Context Inference KW - Location and positioning services KW - Place detection KW - Semantic positioning U2 - 10.1109/UPINLBS.2014.7033715 DO - 10.1109/UPINLBS.2014.7033715 M3 - Conference contribution SN - 9781479960040 SP - 97 EP - 102 BT - 2014 Ubiquitous Positioning Indoor Navigation and Location Based Service, UPINLBS 2014 - Conference Proceedings PB - IEEE CY - Piscataway, NJ, USA ER - TY - JOUR T1 - A general framework for island systems AU - Foldes, S. AU - Horváth, Eszter K. AU - Radeleczki, Sándor AU - Waldhauser, Tamás PY - 2015 Y1 - 2015 N2 - The notion of an island defined on a rectangular board is an elementary combinatorial concept that occurred first in [3]. Results of [3] were starting points for investigations exploring several variations and various aspects of this notion. In this paper we introduce a general framework for islands that subsumes all earlier studied concepts of islands on finite boards, moreover we show that the prime implicants of a Boolean function, the formal concepts of a formal context, convex subgraphs of a simple graph, and some particular subsets of a projective plane also fit into this framework. We axiomatize those cases where islands have the property of being pairwise comparable or disjoint, or they are distant, introducing the notion of a connective island domain and of a proximity domain, respectively. In the general case the maximal systems of islands are characterised by using the concept of an admissible system. We also characterise all possible island systems in the case of connective island domains and proximity domains. AB - The notion of an island defined on a rectangular board is an elementary combinatorial concept that occurred first in [3]. Results of [3] were starting points for investigations exploring several variations and various aspects of this notion. In this paper we introduce a general framework for islands that subsumes all earlier studied concepts of islands on finite boards, moreover we show that the prime implicants of a Boolean function, the formal concepts of a formal context, convex subgraphs of a simple graph, and some particular subsets of a projective plane also fit into this framework. We axiomatize those cases where islands have the property of being pairwise comparable or disjoint, or they are distant, introducing the notion of a connective island domain and of a proximity domain, respectively. In the general case the maximal systems of islands are characterised by using the concept of an admissible system. We also characterise all possible island systems in the case of connective island domains and proximity domains. KW - Admissible system KW - CD-independent and CDW-independent sets KW - Connected subgraph KW - Convex subgraph KW - Distant system KW - Formal concept KW - Height function KW - Island domain KW - Island system KW - Point-to-set proximity relation KW - Prime implicant KW - Projective plane KW - Proximity domain UR - http://www.scopus.com/inward/record.url?scp=84938827353&partnerID=8YFLogxK U2 - 10.14232/actasm-013-279-7 DO - 10.14232/actasm-013-279-7 M3 - Article VL - 81 SP - 3 EP - 24 JO - Acta Universitatis Szegediensis: Acta Scientiarum Mathematicarum JF - Acta Universitatis Szegediensis: Acta Scientiarum Mathematicarum SN - 0001-6969 IS - 1-2 ER - TY - JOUR T1 - Analysis of geometric primitives in quantitative structure models of tree stems AU - Åkerblom, Markku AU - Raumonen, Pasi AU - Kaasalainen, Mikko AU - Casella, Eric PY - 2015 Y1 - 2015 N2 - One way to model a tree is to use a collection of geometric primitives to represent the surface and topology of the stem and branches of a tree. The circular cylinder is often used as the geometric primitive, but it is not the only possible choice. We investigate various geometric primitives and modelling schemes, discuss their properties and give practical estimates for expected modelling errors associated with the primitives. We find that the circular cylinder is the most robust primitive in the sense of a well-bounded volumetric modelling error, even with noise and gaps in the data. Its use does not cause errors significantly larger than those with more complex primitives, while the latter are much more sensitive to data quality. However, in some cases, a hybrid approach with more complex primitives for the stem is useful. AB - One way to model a tree is to use a collection of geometric primitives to represent the surface and topology of the stem and branches of a tree. The circular cylinder is often used as the geometric primitive, but it is not the only possible choice. We investigate various geometric primitives and modelling schemes, discuss their properties and give practical estimates for expected modelling errors associated with the primitives. We find that the circular cylinder is the most robust primitive in the sense of a well-bounded volumetric modelling error, even with noise and gaps in the data. Its use does not cause errors significantly larger than those with more complex primitives, while the latter are much more sensitive to data quality. However, in some cases, a hybrid approach with more complex primitives for the stem is useful. KW - Biomass estimation KW - Error analysis KW - Shape fitting KW - Terrestrial laser scanning KW - Tree modelling UR - http://www.scopus.com/inward/record.url?scp=84937899906&partnerID=8YFLogxK U2 - 10.3390/rs70404581 DO - 10.3390/rs70404581 M3 - Article VL - 7 SP - 4581 EP - 4603 JO - Remote Sensing JF - Remote Sensing SN - 2072-4292 IS - 4 ER - TY - BOOK T1 - Application and Theory of Petri Nets and Concurrency T2 - 36th International Conference, PETRI NETS 2015 Brussels, Belgium, June 21-26, 2015 Proceedings A2 - Devillers, Raymond A2 - Valmari, Antti N1 - JUFOID=62555 PY - 2015 Y1 - 2015 UR - http://www.scopus.com/inward/record.url?scp=84937510301&partnerID=8YFLogxK U2 - 10.1007/978-3-319-19488-2 DO - 10.1007/978-3-319-19488-2 M3 - Anthology SN - 978-3-319-19487-5 VL - 9115 T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) BT - Application and Theory of Petri Nets and Concurrency PB - Springer Verlag ER - TY - GEN T1 - Application of terrestrial LiDAR and modelling of tree branching structure for plant- scaling models in tropical forest trees AU - Lau Sarmiento, Alvaro AU - Bartholomeus, Harm AU - Herold, Martin AU - Martius, Christopher AU - Malhi, Yadvinder AU - Patrick Bentley, Lisa AU - Shenkin, Alexander AU - Raumonen, Pasi PY - 2015 Y1 - 2015 UR - https://silvilaser2015.teledetection.fr/files/Proceedings_Silvilaser_22_09_2015_2.pdf M3 - Conference contribution SP - 96 EP - 98 BT - Proceedings of SilviLaser 2015 ER - TY - GEN T1 - Approach for Investigating Crowdfunding Campaigns with Platform Data: Case Indiegogo AU - Huhtamäki, Jukka AU - Lasrado, Lester AU - Menon, Karan AU - Kärkkäinen, Hannu AU - Jussila, Jari N1 - ORG=mat,0.5 ORG=tlo,0.5 PY - 2015 Y1 - 2015 N2 - Crowdfunding via the internet is a relatively new phenomenon in research and gaining momentum currently. While taking a data-driven approach into investigating the properties and dynamics of crowdfunding campaigns would allow the use of computational social science in investigations on crowdfunding, existing data-driven research on crowdfunding remains very limited. This is particularly true on the level of individual funder data. In this study, we contribute to the empirical body of knowledge on crowdfunding by introducing Indiegogo as a data source and, more specifically, the development and implementation of a crawler and scraper for accessing Indiegogo campaign data, and sharing this openly for other researchers. Due to the extremely dynamic and rapidly increasing amount of crowdfunding data in terms of the number of crowdfunding campaigns and the available investment and individual investor data, we believe our approach is useful for supporting public and open data-driven research, instead of providing merely a static data set. AB - Crowdfunding via the internet is a relatively new phenomenon in research and gaining momentum currently. While taking a data-driven approach into investigating the properties and dynamics of crowdfunding campaigns would allow the use of computational social science in investigations on crowdfunding, existing data-driven research on crowdfunding remains very limited. This is particularly true on the level of individual funder data. In this study, we contribute to the empirical body of knowledge on crowdfunding by introducing Indiegogo as a data source and, more specifically, the development and implementation of a crawler and scraper for accessing Indiegogo campaign data, and sharing this openly for other researchers. Due to the extremely dynamic and rapidly increasing amount of crowdfunding data in terms of the number of crowdfunding campaigns and the available investment and individual investor data, we believe our approach is useful for supporting public and open data-driven research, instead of providing merely a static data set. KW - Crowdfunding KW - Data Extraction KW - Indiegogo KW - entrepreneur KW - crawling KW - scraping KW - computational social science U2 - 10.1145/2818187.2818289 DO - 10.1145/2818187.2818289 M3 - Conference contribution SN - 978-1-4503-3948-3 BT - Academic MindTrek’15 PB - ACM ER - TY - JOUR T1 - Assessing coupling dynamics from an ensemble of time series AU - Gómez-Herrero, Germán AU - Wu, Wei AU - Rutanen, Kalle AU - Soriano, Miguel C. AU - Pipa, Gordon AU - Vicente, Raul N1 - EXT="Gómez-Herrero,Germán" PY - 2015 Y1 - 2015 N2 - Finding interdependency relations between time series provides valuable knowledge about the processes that generated the signals. Information theory sets a natural framework for important classes of statistical dependencies. However, a reliable estimation from information-theoretic functionals is hampered when the dependency to be assessed is brief or evolves in time. Here, we show that these limitations can be partly alleviated when we have access to an ensemble of independent repetitions of the time series. In particular, we gear a data-efficient estimator of probability densities to make use of the full structure of trial-based measures. By doing so, we can obtain time-resolved estimates for a family of entropy combinations (including mutual information, transfer entropy and their conditional counterparts), which are more accurate than the simple average of individual estimates over trials. We show with simulated and real data generated by coupled electronic circuits that the proposed approach allows one to recover the time-resolved dynamics of the coupling between different subsystems. AB - Finding interdependency relations between time series provides valuable knowledge about the processes that generated the signals. Information theory sets a natural framework for important classes of statistical dependencies. However, a reliable estimation from information-theoretic functionals is hampered when the dependency to be assessed is brief or evolves in time. Here, we show that these limitations can be partly alleviated when we have access to an ensemble of independent repetitions of the time series. In particular, we gear a data-efficient estimator of probability densities to make use of the full structure of trial-based measures. By doing so, we can obtain time-resolved estimates for a family of entropy combinations (including mutual information, transfer entropy and their conditional counterparts), which are more accurate than the simple average of individual estimates over trials. We show with simulated and real data generated by coupled electronic circuits that the proposed approach allows one to recover the time-resolved dynamics of the coupling between different subsystems. KW - Ensemble KW - Entropy KW - Estimator KW - Time series KW - Transfer entropy KW - Trial UR - http://www.scopus.com/inward/record.url?scp=84930319366&partnerID=8YFLogxK U2 - 10.3390/e17041958 DO - 10.3390/e17041958 M3 - Article VL - 17 SP - 1958 EP - 1970 JO - Entropy JF - Entropy SN - 1099-4300 IS - 4 ER - TY - CHAP T1 - Asteroid Models from Multiple Data Sources AU - Ďurech, J. AU - Carry, Benoit AU - Delbo, Marco AU - Kaasalainen, Mikko AU - Viikinkoski, Matti PY - 2015 Y1 - 2015 UR - http://www.uapress.arizona.edu/Books/bid2555.htm U2 - 10.2458/azu_uapress_9780816532131-ch010 DO - 10.2458/azu_uapress_9780816532131-ch010 M3 - Chapter SN - 978-0-8165-3213-1 SP - 183 EP - 202 BT - Asteroids IV A2 - Michel, Patrick A2 - DeMeo, Francesca E. A2 - Bottke Jr., William F. PB - UNIVERSITY OF ARIZONA PRESS CY - Tucson ER - TY - GEN T1 - Engineering motif search for large graphs AU - Björklund, Andreas AU - Kaski, Petteri AU - Kowalik, Łukasz AU - Lauri, Juho PY - 2015 Y1 - 2015 N2 - In the graph motif problem, we are given as input a vertexcolored graph H (the host graph) and a multiset of colors M (the motif). Our task is to decide whether H has a connected set of vertices whose multiset of colors agrees with M. The graph motif problem is NP-complete but known to admit parameterized algorithms that run in linear time in the size of H. We demonstrate that algorithms based on constrained multilinear sieving are viable in practice, scaling to graphs with hundreds of millions of edges as long as M remains small. Furthermore, our implementation is topologyinvariant relative to the host graph H, meaning only the most crude graph parameters (number of edges and number of vertices) suffice in practice to determine the algorithm performance. AB - In the graph motif problem, we are given as input a vertexcolored graph H (the host graph) and a multiset of colors M (the motif). Our task is to decide whether H has a connected set of vertices whose multiset of colors agrees with M. The graph motif problem is NP-complete but known to admit parameterized algorithms that run in linear time in the size of H. We demonstrate that algorithms based on constrained multilinear sieving are viable in practice, scaling to graphs with hundreds of millions of edges as long as M remains small. Furthermore, our implementation is topologyinvariant relative to the host graph H, meaning only the most crude graph parameters (number of edges and number of vertices) suffice in practice to determine the algorithm performance. UR - http://www.scopus.com/inward/record.url?scp=84937777832&partnerID=8YFLogxK U2 - 10.1137/1.9781611973754.10 DO - 10.1137/1.9781611973754.10 M3 - Conference contribution T3 - Workshop on Algorithm Engineering and Experiments SP - 104 EP - 118 BT - 2015 Proceedings of the Seventeenth Workshop on Algorithm Engineering and Experiments (ALENEX) ER - TY - GEN T1 - Equal Opportunities in Education of Science, Mathematics and Technology AU - Eriksson, Sirkka-Liisa Anneli PY - 2015 Y1 - 2015 N2 - We are raising a question if our education system in Finland is still providing equal opportunities for everybody in education of Science and Mathematics and Technology. We are using as indicators recent results of three international assessments: The Program for International Student Assessment, Trends in International Mathematics and Science Study and The learning curve in Science and Mathematics. There are a lot of research done internationally and nationally based on the results of these assessments and the background information connected to them. These assessments have also started rich discussions in news and in newspapers.Basic Education Act 1998 in Finland gives every child a right to go to the close by neighborhood school, assigned by the local school authorities, and parents a freedom to choose some another school for their child. In addition, some local schools have a right to emphasize certain areas of education and to choose their students based on suitability tests. Connected to these issues, we are describing some research results concerning the status of schools and selection of schools in Helsinki area. AB - We are raising a question if our education system in Finland is still providing equal opportunities for everybody in education of Science and Mathematics and Technology. We are using as indicators recent results of three international assessments: The Program for International Student Assessment, Trends in International Mathematics and Science Study and The learning curve in Science and Mathematics. There are a lot of research done internationally and nationally based on the results of these assessments and the background information connected to them. These assessments have also started rich discussions in news and in newspapers.Basic Education Act 1998 in Finland gives every child a right to go to the close by neighborhood school, assigned by the local school authorities, and parents a freedom to choose some another school for their child. In addition, some local schools have a right to emphasize certain areas of education and to choose their students based on suitability tests. Connected to these issues, we are describing some research results concerning the status of schools and selection of schools in Helsinki area. M3 - Conference contribution BT - The Proceedings of International Symposium Justice and Solidarity A2 - Laurinkari, Juhani A2 - Tarvanen, Merja ER - TY - JOUR T1 - Frequency domain robust regulation of signals generated by an infinite-dimensional exosystem AU - Laakkonen, Petteri AU - Pohjolainen, Seppo PY - 2015 Y1 - 2015 N2 - This paper deals with frequency domain robust regulation of signals generated by an infinite-dimensional exosystem. The problem is formulated and the stability types are chosen so that one can generalize the existing finite-dimensional theory to more general classes of infinite-dimensional systems and signals. The main results of this article are extensions of the internal model principle, of a necessary and sufficient solvability condition for the robust regulation problem, and of Davison's simple servo compensator for stable plants in the chosen algebraic framework. AB - This paper deals with frequency domain robust regulation of signals generated by an infinite-dimensional exosystem. The problem is formulated and the stability types are chosen so that one can generalize the existing finite-dimensional theory to more general classes of infinite-dimensional systems and signals. The main results of this article are extensions of the internal model principle, of a necessary and sufficient solvability condition for the robust regulation problem, and of Davison's simple servo compensator for stable plants in the chosen algebraic framework. KW - Frequency domain KW - Infinite-dimensional exosystems KW - Infinite-dimensional systems KW - Internal model KW - Robust regulation UR - http://www.scopus.com/inward/record.url?scp=84923923144&partnerID=8YFLogxK U2 - 10.1137/130950057 DO - 10.1137/130950057 M3 - Article VL - 53 SP - 139 EP - 166 JO - SIAM Journal on Control and Optimization JF - SIAM Journal on Control and Optimization SN - 0363-0129 IS - 1 ER - TY - GEN T1 - Infinitesimals and Pavelka logic AU - Turunen, Esko AU - Navara, Mirko PY - 2015 Y1 - 2015 N2 - 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. AB - 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. KW - Mathematical fuzzy logic KW - Rational Pavelka Logic KW - Lukasiewicz operations KW - MV-algebra KW - perfect MV-algebra KW - Chang's MV-algebra KW - FUZZY LOGIC KW - PROPOSITIONAL CALCULI KW - TRUTH-CONSTANTS KW - COMPLETENESS U2 - 10.2991/ifsa-eusflat-15.2015.145 DO - 10.2991/ifsa-eusflat-15.2015.145 M3 - Conference contribution T3 - Advances in Intelligent Systems Research SP - 1027 EP - 1033 BT - PROCEEDINGS OF THE 2015 CONFERENCE OF THE INTERNATIONAL FUZZY SYSTEMS ASSOCIATION AND THE EUROPEAN SOCIETY FOR FUZZY LOGIC AND TECHNOLOGY A2 - Alonso, JM A2 - Bustince, H A2 - Reformat, M PB - Atlantis Press CY - PARIS ER - TY - GEN T1 - Massive-Scale Tree Modelling from TLS Data AU - Raumonen, P. AU - Casella, E. AU - Calders, K. AU - Murphy, S. AU - Åkerblom, M. AU - Kaasalainen, M. N1 - JUFOID=81104 PY - 2015 Y1 - 2015 N2 - This paper presents a method for reconstructing automatically the quantitative structure model of every tree in a forest plot from terrestrial laser scanner data. A new feature is the automatic extraction of individual trees from the point cloud. The method is tested with a 30-m diameter English oak plot and a 80-m diameter Australian eucalyptus plot. For the oak plot the total biomass was overestimated by about 17 %, when compared to allometry (N = 15), and the modelling time was about 100 min with a laptop. For the eucalyptus plot the total biomass was overestimated by about 8.5 %, when compared to a destructive reference (N = 27), and the modelling time was about 160 min. The method provides accurate and fast tree modelling abilities for, e. g., biomass estimation and ground truth data for airborne measurements at a massive ground scale. AB - This paper presents a method for reconstructing automatically the quantitative structure model of every tree in a forest plot from terrestrial laser scanner data. A new feature is the automatic extraction of individual trees from the point cloud. The method is tested with a 30-m diameter English oak plot and a 80-m diameter Australian eucalyptus plot. For the oak plot the total biomass was overestimated by about 17 %, when compared to allometry (N = 15), and the modelling time was about 100 min with a laptop. For the eucalyptus plot the total biomass was overestimated by about 8.5 %, when compared to a destructive reference (N = 27), and the modelling time was about 160 min. The method provides accurate and fast tree modelling abilities for, e. g., biomass estimation and ground truth data for airborne measurements at a massive ground scale. KW - quantitative structure model KW - automatic tree extraction KW - biomass KW - forest plot KW - ground truth KW - oak KW - eucalyptus KW - LiDAR KW - laser scanner data KW - terrestrial U2 - 10.5194/isprsannals-II-3-W4-189-2015 DO - 10.5194/isprsannals-II-3-W4-189-2015 M3 - Conference contribution VL - II-3/W4 T3 - International Archives of the Photogrammetry Remote Sensing and Spatial Information Sciences SP - 189 EP - 196 BT - ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences A2 - Stilla, U A2 - Heipke, C PB - COPERNICUS GESELLSCHAFT MBH CY - GOTTINGEN ER - TY - GEN T1 - Motion Model for Positioning with Graph-Based Indoor Map AU - Nurminen, Henri AU - Koivisto, Mike AU - Ali-Löytty, Simo AU - Piche, Robert N1 - ORG=ase,0.8 ORG=mat,0.2 PY - 2015 Y1 - 2015 N2 - This article presents a training-free probabilistic pedestrian motion model that uses indoor map information represented as a set of links that are connected by nodes. This kind of structure can be modelled as a graph. In the proposed model, as a position estimate reaches a link end, the choice probabilities of the next link are proportional to the total link lengths (TLL), the total lengths of the subgraphs accessible by choosing the considered link alternative. The TLLs can be computed off-line using only the graph, and they can be updated if training data are available. A particle filter in which all the particles move on the links following the TLL-based motion model is formulated. The TLL-based motion model has advantageous theoretical properties compared to the conventional models. Furthermore, the real-data WLAN positioning tests show that the positioning accuracy of the algorithm is similar or in many cases better than that of the conventional algorithms. The TLL-based model is found to be advantageous especially if position measurements are used infrequently, with 10-second or more time intervals. AB - This article presents a training-free probabilistic pedestrian motion model that uses indoor map information represented as a set of links that are connected by nodes. This kind of structure can be modelled as a graph. In the proposed model, as a position estimate reaches a link end, the choice probabilities of the next link are proportional to the total link lengths (TLL), the total lengths of the subgraphs accessible by choosing the considered link alternative. The TLLs can be computed off-line using only the graph, and they can be updated if training data are available. A particle filter in which all the particles move on the links following the TLL-based motion model is formulated. The TLL-based motion model has advantageous theoretical properties compared to the conventional models. Furthermore, the real-data WLAN positioning tests show that the positioning accuracy of the algorithm is similar or in many cases better than that of the conventional algorithms. The TLL-based model is found to be advantageous especially if position measurements are used infrequently, with 10-second or more time intervals. U2 - 10.1109/IPIN.2014.7275539 DO - 10.1109/IPIN.2014.7275539 M3 - Conference contribution SP - 646 EP - 655 BT - 2014 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 27-30 Oct. 2014, Busan, South Korea PB - IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - New Insights for Relational Capital AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Russell, Martha G. PY - 2015 Y1 - 2015 N2 - In this paper, we concentrate on relational capital, manifestation of the old adage ”it is not what you know but who you know”. We propose that in this networked world, the importance of relationships between multiple stakeholders created by key personnel and financing becomes fundamental, and hence understanding and measuring those becomes fundamental, too. Accordingly, we highlight a need to go beyond social, individual or personal relationships and organizational context, as well as beyond the limitations of the dyadic (one actor to one actor) view on relationships. Hence, we are introducing the ecosystem as the context for measuring relational capital. This paper builds on a construct of ecosystemic relational capital, created for understanding and measuring the importance of relationships in the context of ecosystems. It looks at the totality of relationships both at organizational level and at individual level, measuring the structures and characteristics related to individuals, organizations as well as the ecosystem as a whole (Still et al. 2014a). We acknowledge that the initial framework emphasizes the “networking capabilities” element of relational capital, with less attention to the element of “customer loyalty and reputation”, which is the motivation for building on the construct. The processes of ecosystemic relational capital are built on the possibilities afforded by the volumes of digital data, mostly from social media, providing details on the relationships between various actors related to various regions, sectors, technologies and products. However, we propose enhancing the holistic integration for better understanding and measuring of relational capital with the application of methods of social network analysis (SNA), network visualizations and social media analytics. In this paper, we present concrete examples of the enhanced framework. At the same time, we acknowledge that there are many other avenues for obtaining novel insights for relational capital with these analytics, and we strongly encourage researchers and practitioners to do so. AB - In this paper, we concentrate on relational capital, manifestation of the old adage ”it is not what you know but who you know”. We propose that in this networked world, the importance of relationships between multiple stakeholders created by key personnel and financing becomes fundamental, and hence understanding and measuring those becomes fundamental, too. Accordingly, we highlight a need to go beyond social, individual or personal relationships and organizational context, as well as beyond the limitations of the dyadic (one actor to one actor) view on relationships. Hence, we are introducing the ecosystem as the context for measuring relational capital. This paper builds on a construct of ecosystemic relational capital, created for understanding and measuring the importance of relationships in the context of ecosystems. It looks at the totality of relationships both at organizational level and at individual level, measuring the structures and characteristics related to individuals, organizations as well as the ecosystem as a whole (Still et al. 2014a). We acknowledge that the initial framework emphasizes the “networking capabilities” element of relational capital, with less attention to the element of “customer loyalty and reputation”, which is the motivation for building on the construct. The processes of ecosystemic relational capital are built on the possibilities afforded by the volumes of digital data, mostly from social media, providing details on the relationships between various actors related to various regions, sectors, technologies and products. However, we propose enhancing the holistic integration for better understanding and measuring of relational capital with the application of methods of social network analysis (SNA), network visualizations and social media analytics. In this paper, we present concrete examples of the enhanced framework. At the same time, we acknowledge that there are many other avenues for obtaining novel insights for relational capital with these analytics, and we strongly encourage researchers and practitioners to do so. M3 - Article VL - 13 SP - 167 EP - 182 JO - Electronic Journal of Knowledge Management JF - Electronic Journal of Knowledge Management SN - 1479-4411 IS - 1 ER - TY - JOUR T1 - Nondestructive estimates of above-ground biomass using terrestrial laser scanning AU - Calders, Kim AU - Newnhamn, Glenn AU - Burt, Andrew AU - Murphy, Simon AU - Raumonen, Pasi AU - Herold, Martin AU - Culvenor, Darius AU - Avitable, Valerio AU - Disney, Mathias AU - Armston, John AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-16

Publisher name: Wiley-Blackwell Publishing PY - 2015 Y1 - 2015 U2 - 10.1111/2041-210X.12301 DO - 10.1111/2041-210X.12301 M3 - Article VL - 6 SP - 198 EP - 208 JO - Methods in Ecology and Evolution JF - Methods in Ecology and Evolution SN - 2041-210X IS - 2 ER - TY - JOUR T1 - On constructibility and unconstructibility of LTS operators from other LTS operators AU - Valmari, Antti PY - 2015 Y1 - 2015 N2 - An LTS operator can be constructed from a set of LTS operators up to an equivalence if and only if there is an LTS expression that only contains operators from the set and whose result is equivalent to the result of the operator. In this publication this idea is made precise in the context where each LTS has an alphabet of its own and the operators may depend on the alphabets. Then the extent to which LTS operators are constructible is studied. Most, if not all, established LTS operators have the property that each trace of the result arises from the execution of no more than one trace of each of its argument LTSs, and similarly for infinite traces. All LTS operators that have this property and satisfy some other rather weak regularity properties can be constructed from parallel composition and hiding up to the equivalence that compares the alphabets, traces, and infinite traces of the LTSs. Furthermore, a collection of other miscellaneous constructibility and unconstructibility results is presented. AB - An LTS operator can be constructed from a set of LTS operators up to an equivalence if and only if there is an LTS expression that only contains operators from the set and whose result is equivalent to the result of the operator. In this publication this idea is made precise in the context where each LTS has an alphabet of its own and the operators may depend on the alphabets. Then the extent to which LTS operators are constructible is studied. Most, if not all, established LTS operators have the property that each trace of the result arises from the execution of no more than one trace of each of its argument LTSs, and similarly for infinite traces. All LTS operators that have this property and satisfy some other rather weak regularity properties can be constructed from parallel composition and hiding up to the equivalence that compares the alphabets, traces, and infinite traces of the LTSs. Furthermore, a collection of other miscellaneous constructibility and unconstructibility results is presented. U2 - 10.1007/s00236-015-0217-2 DO - 10.1007/s00236-015-0217-2 M3 - Article VL - 52 SP - 207 EP - 234 JO - Acta Informatica JF - Acta Informatica SN - 0001-5903 IS - 2-3 ER - TY - CHAP T1 - On Robustness of Strongly Stable Semigroups with Spectrum on iR AU - Paunonen, Lassi PY - 2015 Y1 - 2015 N2 - We study the robustness properties of strong stability of a strongly continuous semigroup on a Hilbert space. We concentrate on a situation where the generator of the unperturbed semigroup has a finite spectral point on the imaginary axis and the resolvent operator is polynomially bounded elsewhere on the imaginary axis. As our main result we present conditions for preservation of the strong stability of the semigroup under bounded perturbations. AB - We study the robustness properties of strong stability of a strongly continuous semigroup on a Hilbert space. We concentrate on a situation where the generator of the unperturbed semigroup has a finite spectral point on the imaginary axis and the resolvent operator is polynomially bounded elsewhere on the imaginary axis. As our main result we present conditions for preservation of the strong stability of the semigroup under bounded perturbations. KW - Strongly Continuous Semigroup KW - Functional Analysis U2 - 10.1007/978-3-319-12145-1 DO - 10.1007/978-3-319-12145-1 M3 - Chapter SN - 978-3-319-12144-4 T3 - Springer Proceedings in Mathematics & Statistics SP - 105 EP - 121 BT - Semigroups of Operators -Theory and Applications A2 - Banasiak, Jacek A2 - Bobrowski, Adam A2 - Lachowicz, Mirosław PB - Springer International Publishing ER - TY - GEN T1 - On Robust Output Regulation for Continuous-Time Periodic Systems AU - Paunonen, Lassi PY - 2015 Y1 - 2015 N2 - We construct a controller to solve robust output tracking problem for a stable linear continuous-time periodic system on a finite-dimensional space. We begin by transforming the time-dependent plant to a time-invariant discrete-time system using the ``lifting technique''. The controller is then designed to achieve robust output tracking for the lifted system. We show that an exact solution to the control problem for a continuous-time periodic system necessarily requires an error feedback controller with an infinite-dimensional internal model. The results are illustrated with an example where robust output tracking is considered for a stable periodic scalar system. AB - We construct a controller to solve robust output tracking problem for a stable linear continuous-time periodic system on a finite-dimensional space. We begin by transforming the time-dependent plant to a time-invariant discrete-time system using the ``lifting technique''. The controller is then designed to achieve robust output tracking for the lifted system. We show that an exact solution to the control problem for a continuous-time periodic system necessarily requires an error feedback controller with an infinite-dimensional internal model. The results are illustrated with an example where robust output tracking is considered for a stable periodic scalar system. U2 - 10.1137/1.9781611974072.7 DO - 10.1137/1.9781611974072.7 M3 - Conference contribution BT - 2015 Proceedings of the SIAM Conference on Control and its Applications PB - SIAM, Society for Industrial and Applied Mathematics ER - TY - CHAP T1 - Ostinato T2 - The Exploration-Automation Cycle of User-Centric, Process-Automated Data-Driven Visual Network Analytics AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Rubens, Neil AU - Still, Kaisa PY - 2015 Y1 - 2015 U2 - 10.1007/978-3-319-18552-1 DO - 10.1007/978-3-319-18552-1 M3 - Chapter SN - 978-3-319-18551-4 T3 - Computational Social Science SP - 197 EP - 222 BT - Transparency in Social Media A2 - Matei, Sorin Adam A2 - Russell, Martha G. A2 - Bertino, Elisa PB - Springer International Publishing ER - TY - JOUR T1 - Perfect Pavelka Logic AU - Turunen, Esko AU - Navara, Mirko N1 - In Press.Siirretään Portfolio15

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-08

Publisher name: Elsevier BV PY - 2015 Y1 - 2015 U2 - 10.1016/j.fss.2014.06.011 DO - 10.1016/j.fss.2014.06.011 M3 - Article JO - Fuzzy Sets and Systems JF - Fuzzy Sets and Systems SN - 0165-0114 ER - TY - GEN T1 - Practical Partial Order Reduction for CSP AU - Gibson-Robinson, Thomas AU - Hansen, Henri AU - Roscoe, A. Willian AU - Wang, Xu PY - 2015 Y1 - 2015 N2 - FDR is an explicit-state refinement checker for the process algebra CSP and, as such, is vulnerable to the state-explosion problem. In this paper, we show how a form of partial-order reduction, an automatic state reduction mechanism, can be utilised to soundly reduce the number of states that must be visited. In particular, we develop a compositional method for partial-order reduction that takes advantage of FDR’s internal, compositional, process representation. Further, we develop novel methods of preserving the traces of a process which allow partial-order reduction to be applied to arbitrary FDR refinement checks. We also provide details on how to efficiently implement the algorithms required for partial-order reduction. AB - FDR is an explicit-state refinement checker for the process algebra CSP and, as such, is vulnerable to the state-explosion problem. In this paper, we show how a form of partial-order reduction, an automatic state reduction mechanism, can be utilised to soundly reduce the number of states that must be visited. In particular, we develop a compositional method for partial-order reduction that takes advantage of FDR’s internal, compositional, process representation. Further, we develop novel methods of preserving the traces of a process which allow partial-order reduction to be applied to arbitrary FDR refinement checks. We also provide details on how to efficiently implement the algorithms required for partial-order reduction. U2 - 10.1007/978-3-319-17524-9_14 DO - 10.1007/978-3-319-17524-9_14 M3 - Conference contribution SN - 978-3-319-17523-2 VL - 9058 T3 - Lecture Notes in Computer Science SP - 188 EP - 203 BT - Nasa Formal Methods PB - Springer International Publishing ER - TY - JOUR T1 - Projektioppiminen yläkoulun matematiikassa AU - Viro, Elina AU - Eriksson, Sirkka-Liisa PY - 2015 Y1 - 2015 UR - http://luma.fi/lumat/4273 M3 - Article VL - 3 SP - 1005 EP - 1009 JO - LUMAT: International Journal on Math, Science and Technology Education JF - LUMAT: International Journal on Math, Science and Technology Education SN - 2323-7112 IS - 7 ER - TY - GEN T1 - Quantitative structure tree models from terrestrial laser scanner data AU - Raumonen, Pasi Antero PY - 2015 Y1 - 2015 UR - https://silvilaser2015.teledetection.fr/files/Proceedings_Silvilaser_22_09_2015_2.pdf M3 - Conference contribution SP - 32 EP - 34 BT - Proceedings of SilviLaser 2015 ER - TY - GEN T1 - Reducing uncertainties in above-ground biomass estimates using terrestrial laser scanning AU - Calders, Kim AU - Burt, Andrew AU - Newnham, Glenn AU - Disney, Mathias AU - Murphy, Simon AU - Raumonen, Pasi AU - Herold, Martin AU - Culvenor, Darius AU - Armston, John AU - Avitabile, Valerio AU - Kaasalainen, Mikko PY - 2015 Y1 - 2015 UR - https://silvilaser2015.teledetection.fr/files/Proceedings_Silvilaser_22_09_2015_2.pdf M3 - Conference contribution SP - 197 EP - 199 BT - Proceedings of SilviLaser 2015 ER - TY - JOUR T1 - Robustness of strong stability of discrete semigroups AU - Paunonen, Lassi N1 - Siirretään Portfolio15

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-08

Publisher name: Elsevier BV PY - 2015 Y1 - 2015 N2 - In this paper we study the robustness of strong stability of a discrete semigroup on a Hilbert space under bounded perturbations. As the main result we present classes of perturbations preserving the strong stability of the semigroup. AB - In this paper we study the robustness of strong stability of a discrete semigroup on a Hilbert space under bounded perturbations. As the main result we present classes of perturbations preserving the strong stability of the semigroup. U2 - 10.1016/j.sysconle.2014.11.004 DO - 10.1016/j.sysconle.2014.11.004 M3 - Article VL - 75 SP - 35 EP - 40 JO - Systems and Control Letters JF - Systems and Control Letters SN - 0167-6911 ER - TY - GEN T1 - Robust Regulation of SISO Systems: The Fractional Ideal Approach AU - Laakkonen, Petteri AU - Quadrat, Alban PY - 2015 Y1 - 2015 N2 - We solve the robust regulation problem for single-input single-output plants by using the fractional ideal approach and without assuming the existence of coprime factorizations. In particular, we are able to formulate the famous internal model principle for stabilizable plants which do not necessarily admit coprime factorizations. We are able to give a necessary and suffcient solvability condition for the robust regulation problem, which leads to a design method for a robustly regulating controller. The theory is illustrated by examples. AB - We solve the robust regulation problem for single-input single-output plants by using the fractional ideal approach and without assuming the existence of coprime factorizations. In particular, we are able to formulate the famous internal model principle for stabilizable plants which do not necessarily admit coprime factorizations. We are able to give a necessary and suffcient solvability condition for the robust regulation problem, which leads to a design method for a robustly regulating controller. The theory is illustrated by examples. U2 - 10.1137/1.9781611974072.43 DO - 10.1137/1.9781611974072.43 M3 - Conference contribution SP - 311 EP - 318 BT - Proceedings of the SIAM Conference on Control and Its Applications (CT15) PB - SIAM, Society for Industrial and Applied Mathematics ER - TY - JOUR T1 - Robust Regulation Theory for Transfer Functions With a Coprime Factorization AU - Laakkonen, Petteri PY - 2015 Y1 - 2015 N2 - Classical frequency domain results of robust regulation are extended by requiring only a right or a left coprime factorization of a plant, but not both. The famous internal model principle is generalized first, which leads to a necessary and sufficient solvability condition of the robust regulation problem and to a parametrization of all robustly regulating controllers. In addition, a procedure for constructing robustly regulating controllers is proposed. AB - Classical frequency domain results of robust regulation are extended by requiring only a right or a left coprime factorization of a plant, but not both. The famous internal model principle is generalized first, which leads to a necessary and sufficient solvability condition of the robust regulation problem and to a parametrization of all robustly regulating controllers. In addition, a procedure for constructing robustly regulating controllers is proposed. KW - Frequency-domain analysis KW - Nickel KW - Robustness KW - Stability analysis KW - Topology KW - Transfer functions KW - Yttrium KW - Distributed parameter systems KW - linear systems KW - parametrization KW - robust control U2 - 10.1109/TAC.2015.2497898 DO - 10.1109/TAC.2015.2497898 M3 - Article JO - IEEE Transactions on Automatic Control JF - IEEE Transactions on Automatic Control SN - 0018-9286 ER - TY - JOUR T1 - Simulointi nopeuttaa käyttöiän määritystä AU - Ojala, Petteri AU - Saarenrinne, Pentti AU - Miettinen, Juha AU - Multanen, Petteri AU - Kiilunen, Janne AU - Hietala, Jukka-Pekka AU - Kolu, Antti AU - Pippola, Juha AU - Mostofizadeh, Milad AU - Ylönen, Markku N1 - ORG=mol,0.25 ORG=mei,0.25 ORG=iha,0.25 ORG=dee,0.25 PY - 2015 Y1 - 2015 M3 - Article VL - 2 SP - 24 EP - 27 JO - Promaint JF - Promaint SN - 1797-2000 ER - TY - JOUR T1 - Some Ring Theory from Jeno Szigeti AU - Foldes, Stephane PY - 2015 Y1 - 2015 N2 - A selection of ring theory papers by Jeno Szigeti is reviewed with an emphasis on aspects related to matrix algebras. AB - A selection of ring theory papers by Jeno Szigeti is reviewed with an emphasis on aspects related to matrix algebras. KW - LIE NILPOTENT RINGS KW - MATRIX-RINGS KW - POLYNOMIAL-IDENTITIES KW - DETERMINANTS KW - ALGEBRAS M3 - Article VL - 16 SP - 115 EP - 121 JO - Miskolc Mathematical Notes JF - Miskolc Mathematical Notes SN - 1787-2405 IS - 1 ER - TY - GEN T1 - Terrestrial LiDAR and 3D tree Quantitative Structure Model for quantification of aboveground biomass loss from selective logging in a tropical rainforest of Peru AU - Gonzalez de Tanago, Jose AU - Bartholomeus, Harm AU - Joseph, Shijo AU - Herold, Martin AU - Avitabile, Valerio AU - Goodman, Rosa AU - Raumonen, Pasi AU - Burt, Andrew PY - 2015 Y1 - 2015 UR - https://silvilaser2015.teledetection.fr/files/Proceedings_Silvilaser_22_09_2015_2.pdf M3 - Conference contribution SP - 119 EP - 121 BT - Proceedings of SilviLaser 2015 ER - TY - GEN T1 - Traceability of essential climate variables through forest stand reconstruction with terrestrial laser scanning AU - Calders, Kim AU - Disney, Mathias AU - Nightingale, Joanne AU - Origo, Niall AU - Barker, Alexandra AU - Raumonen, Pasi Antero AU - Lewis, Philip AU - Burt, Andrew AU - Brennan, James AU - Fox, Nigel PY - 2015 Y1 - 2015 UR - https://silvilaser2015.teledetection.fr/files/Proceedings_Silvilaser_22_09_2015_2.pdf M3 - Conference contribution SP - 122 EP - 124 BT - Proceedings of SilviLaser 2015 ER - TY - JOUR T1 - Using video games to combine learning and assessment in mathematics education AU - Kiili, Kristian AU - Devlin, Keith AU - Perttula, Arttu AU - Tuomi, Sanna AU - Lindstedt, Antero PY - 2015 Y1 - 2015 UR - http://journal.seriousgamessociety.org/index.php?journal=IJSG&page=announcement&op=view&path%5B%5D=5 U2 - 10.17083/ijsg.v2i4.98 DO - 10.17083/ijsg.v2i4.98 M3 - Article VL - 2 JO - International Journal of Serious Games JF - International Journal of Serious Games SN - 2384-8766 IS - 4 ER - TY - JOUR T1 - Guard-based Partial Order Reduction AU - Laarman, Alfons AU - Pater, Elwin AU - Van de Pol, Jaco AU - Hansen, Henri PY - 2014/12 Y1 - 2014/12 N2 - This paper aims at making partial-order reduction independent of the modeling language. To this end, we present a guard-based method which is a general-purpose implementation of the stubborn set method. We approach the implementation through so-called necessary enabling sets and do-not-accord sets, and give an algorithm suitable for an abstract model checking interface. We also introduce necessary disabling sets and heuristics to produce smaller stubborn sets and thus better reduction at low costs. We explore the effect of these methods using an implementation in the model checker LTSmin. We experiment with partial-order reduction on a number of Promela models, on benchmarks from the BEEM database in the DVE language, and with several with LTL properties. The efficiency of the heuristic algorithm is established by a comparison to the subset-minimal Deletion algorithm and the simple closure algorithm. We also compare our results to the Spin model checker. While the reductions take longer, they are consistently better than Spin ’s ample set and often surpass the upper bound for the process-based ample sets, established empirically earlier on BEEM models. AB - This paper aims at making partial-order reduction independent of the modeling language. To this end, we present a guard-based method which is a general-purpose implementation of the stubborn set method. We approach the implementation through so-called necessary enabling sets and do-not-accord sets, and give an algorithm suitable for an abstract model checking interface. We also introduce necessary disabling sets and heuristics to produce smaller stubborn sets and thus better reduction at low costs. We explore the effect of these methods using an implementation in the model checker LTSmin. We experiment with partial-order reduction on a number of Promela models, on benchmarks from the BEEM database in the DVE language, and with several with LTL properties. The efficiency of the heuristic algorithm is established by a comparison to the subset-minimal Deletion algorithm and the simple closure algorithm. We also compare our results to the Spin model checker. While the reductions take longer, they are consistently better than Spin ’s ample set and often surpass the upper bound for the process-based ample sets, established empirically earlier on BEEM models. U2 - 10.1007/s10009-014-0363-9 DO - 10.1007/s10009-014-0363-9 M3 - Article VL - 18 SP - 427 EP - 448 JO - International Journal on Software Tools for Technology Transfer JF - International Journal on Software Tools for Technology Transfer SN - 1433-2779 IS - 4 ER - TY - JOUR T1 - UWB Positioning with Generalized Gaussian Mixture Filters AU - Muller, Philipp AU - Wymeersch, Henk AU - Piche, Robert N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-08-30

Publisher name: Institute of Electrical and Electronics Engineers PY - 2014/10 Y1 - 2014/10 N2 - Low-complexity Bayesian filtering for nonlinear models is challenging. Approximative methods based on Gaussian mixtures (GM) and particle filters are able to capture multimodality, but suffer from high computational demand. In this paper, we provide an in-depth analysis of a generalized GM (GGM), which allows component weights to be negative, and requires significantly fewer components than the traditional GM for ranging models. Based on simulations and tests with real data from a network of UWB nodes, we show how the algorithm’s accuracy depends on the uncertainty of the measurements. For nonlinear ranging the GGM filter outperforms the extended Kalman filter (EKF) in both positioning accuracy and consistency in environments with uncertain measurements, and requires only slightly higher computational effort when the number of measurement channels is small. In networks with highly reliable measurements, the GGM filter yields similar accuracy and better consistency than the EKF. AB - Low-complexity Bayesian filtering for nonlinear models is challenging. Approximative methods based on Gaussian mixtures (GM) and particle filters are able to capture multimodality, but suffer from high computational demand. In this paper, we provide an in-depth analysis of a generalized GM (GGM), which allows component weights to be negative, and requires significantly fewer components than the traditional GM for ranging models. Based on simulations and tests with real data from a network of UWB nodes, we show how the algorithm’s accuracy depends on the uncertainty of the measurements. For nonlinear ranging the GGM filter outperforms the extended Kalman filter (EKF) in both positioning accuracy and consistency in environments with uncertain measurements, and requires only slightly higher computational effort when the number of measurement channels is small. In networks with highly reliable measurements, the GGM filter yields similar accuracy and better consistency than the EKF. KW - Bayesian filtering KW - Gaussian Mixture KW - indoor positioning KW - UWB U2 - 10.1109/TMC.2014.2307301 DO - 10.1109/TMC.2014.2307301 M3 - Article VL - 13 SP - 2406 EP - 2414 JO - IEEE Transactions on Mobile Computing JF - IEEE Transactions on Mobile Computing SN - 1536-1233 IS - 10 ER - TY - JOUR T1 - Quantitative Analysis of Dynamic Association in Live Biological Fluorescent Samples AU - Ruusuvuori, Pekka AU - Paavolainen, Lassi AU - Rutanen, Kalle AU - Maki, Anita AU - Huttunen, Heikki AU - Marjomaki, Varpu N1 - Contribution: organisation=sgn,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2014-11-25

Publisher name: Public Library of Science

publication_forum: 65163 PY - 2014/4/11 Y1 - 2014/4/11 N2 - Determining vesicle localization and association in live microscopy may be challenging due to non-simultaneous imaging of rapidly moving objects with two excitation channels. Besides errors due to movement of objects, imaging may also introduce shifting between the image channels, and traditional colocalization methods cannot handle such situations. Our approach to quantifying the association between tagged proteins is to use an object-based method where the exact match of object locations is not assumed. Point-pattern matching provides a measure of correspondence between two point-sets under various changes between the sets. Thus, it can be used for robust quantitative analysis of vesicle association between image channels. Results for a large set of synthetic images shows that the novel association method based on point-pattern matching demonstrates robust capability to detect association of closely located vesicles in live cell-microscopy where traditional colocalization methods fail to produce results. In addition, the method outperforms compared Iterated Closest Points registration method. Results for fixed and live experimental data shows the association method to perform comparably to traditional methods in colocalization studies for fixed cells and to perform favorably in association studies for live cells. AB - Determining vesicle localization and association in live microscopy may be challenging due to non-simultaneous imaging of rapidly moving objects with two excitation channels. Besides errors due to movement of objects, imaging may also introduce shifting between the image channels, and traditional colocalization methods cannot handle such situations. Our approach to quantifying the association between tagged proteins is to use an object-based method where the exact match of object locations is not assumed. Point-pattern matching provides a measure of correspondence between two point-sets under various changes between the sets. Thus, it can be used for robust quantitative analysis of vesicle association between image channels. Results for a large set of synthetic images shows that the novel association method based on point-pattern matching demonstrates robust capability to detect association of closely located vesicles in live cell-microscopy where traditional colocalization methods fail to produce results. In addition, the method outperforms compared Iterated Closest Points registration method. Results for fixed and live experimental data shows the association method to perform comparably to traditional methods in colocalization studies for fixed cells and to perform favorably in association studies for live cells. KW - COLOCALIZATION KW - IMAGES KW - MICROSCOPY KW - REGISTRATION KW - ALGORITHM KW - TRACKING KW - OBJECTS U2 - 10.1371/journal.pone.0094245 DO - 10.1371/journal.pone.0094245 M3 - Article VL - 9 JO - PLoS ONE JF - PLoS ONE SN - 1932-6203 IS - 4 M1 - 94245 ER - TY - BOOK T1 - A Measurement-based Statistical Model to Evaluate Uncertainty in Long-range Noise Assessments AU - Maijala, Panu N1 - Awarding institution:Tampereen teknillinen yliopisto - Tampere University of Technology

Submitter:Submitted by Kaisa Kulkki (kaisa.kulkki@tut.fi) on 2013-12-18T08:26:49Z No. of bitstreams: 1 maijala.pdf: 8876096 bytes, checksum: a9348271868d9cc37d85ecf3800e67ff (MD5)

Submitter:Approved for entry into archive by Kaisa Kulkki (kaisa.kulkki@tut.fi) on 2013-12-18T09:39:44Z (GMT) No. of bitstreams: 1 maijala.pdf: 8876096 bytes, checksum: a9348271868d9cc37d85ecf3800e67ff (MD5)

Submitter:Made available in DSpace on 2013-12-18T09:39:44Z (GMT). No. of bitstreams: 1 maijala.pdf: 8876096 bytes, checksum: a9348271868d9cc37d85ecf3800e67ff (MD5) PY - 2014/1/3 Y1 - 2014/1/3 N2 - Carefully validated long-range sound propagation measurements with extensive meteorological instrumentation were continued for 612 days without interruption, around the clock, resulting in a database with millions of files, terabytes of sound and environmental data, and hundreds of pages of documentation. More than 100 environmental variables were analysed by statistical means, and many statistically highly significant dependencies linked to excess attenuation were found. At a distance of 3 km from the source, excess attenuation was spread over a dynamic range of 80 dB, with differences of 10 dB between individual quarters of the year; also, negative excess attenuation at frequencies below 400 Hz existed. The low frequencies were affected mainly by the stability characteristics of the atmosphere and the lapse rate. Humidity; lapse rate; sensible heat flux; and longitudinal, transverse, and vertical turbulence intensities explain excess attenuation at higher frequencies to a statistically highly significant extent. Through application of a wide range of regression analyses, a set of criteria for frequency-dependent uncertainty in sound propagation was created. These criteria were incorporated into a software module, which, together with a state-of-the-art physical sound propagation calculation module, makes it possible to perform environmental noise assessments with known uncertainty. This approach can be applied to the short term measurements too and it was shown that some of the most complex meteorological variables, among them atmospheric turbulence, can be taken into account. Comparison with two standardized noise modelling methods showed that the statistical model covers well a range of uncertainty not matched with the standardized methods and the measured excess attenuation fit within the limits of predicted uncertainty. AB - Carefully validated long-range sound propagation measurements with extensive meteorological instrumentation were continued for 612 days without interruption, around the clock, resulting in a database with millions of files, terabytes of sound and environmental data, and hundreds of pages of documentation. More than 100 environmental variables were analysed by statistical means, and many statistically highly significant dependencies linked to excess attenuation were found. At a distance of 3 km from the source, excess attenuation was spread over a dynamic range of 80 dB, with differences of 10 dB between individual quarters of the year; also, negative excess attenuation at frequencies below 400 Hz existed. The low frequencies were affected mainly by the stability characteristics of the atmosphere and the lapse rate. Humidity; lapse rate; sensible heat flux; and longitudinal, transverse, and vertical turbulence intensities explain excess attenuation at higher frequencies to a statistically highly significant extent. Through application of a wide range of regression analyses, a set of criteria for frequency-dependent uncertainty in sound propagation was created. These criteria were incorporated into a software module, which, together with a state-of-the-art physical sound propagation calculation module, makes it possible to perform environmental noise assessments with known uncertainty. This approach can be applied to the short term measurements too and it was shown that some of the most complex meteorological variables, among them atmospheric turbulence, can be taken into account. Comparison with two standardized noise modelling methods showed that the statistical model covers well a range of uncertainty not matched with the standardized methods and the measured excess attenuation fit within the limits of predicted uncertainty. M3 - Doctoral thesis SN - 978-951-38-8109-2 T3 - VTT Science BT - A Measurement-based Statistical Model to Evaluate Uncertainty in Long-range Noise Assessments PB - VTT ER - TY - BOOK T1 - 20th Inverse Days 2014, Tampere 9th-11th December 2014 T2 - Abstracts A2 - Åkerblom, Markku N1 - Versio ok 14.12.2015 PY - 2014 Y1 - 2014 N2 - Proceedings of the Inverse Days 2014 conference organized in Tampere 9th - 11th December 2014. This document contains the schedule of the conference, the list of participants and the abstracts of the talks given at the conference. AB - Proceedings of the Inverse Days 2014 conference organized in Tampere 9th - 11th December 2014. This document contains the schedule of the conference, the list of participants and the abstracts of the talks given at the conference. M3 - Commissioned report SN - 978-952-15-3425-6 T3 - Tampere University of Technology. Department of Mathematics. Research Report BT - 20th Inverse Days 2014, Tampere 9th-11th December 2014 PB - Tampere University of Technology, Department of Mathematics ER - TY - JOUR T1 - A comparison of confluence and ample sets in probabilistic and non-probabilistic branching time AU - Hansen, Henri AU - Timmer, Mark N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-05-31

Publisher name: Elsevier PY - 2014 Y1 - 2014 U2 - 10.1016/j.tcs.2013.07.014 DO - 10.1016/j.tcs.2013.07.014 M3 - Article VL - 528 SP - 103 EP - 123 JO - Theoretical Computer Science JF - Theoretical Computer Science SN - 0304-3975 ER - TY - JOUR T1 - Adaptive mobile tracking in unknown non-line-of-sight conditions with application to digital TV networks AU - Chen, L. AU - Piche, R. AU - Kuusniemi, H. AU - Chen, R. N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-05-25

Publisher name: Springer PY - 2014 Y1 - 2014 U2 - 10.1186/1687-6180-2014-22 DO - 10.1186/1687-6180-2014-22 M3 - Article VL - 2014 JO - Eurasip Journal on Advances in Signal Processing JF - Eurasip Journal on Advances in Signal Processing SN - 1687-6172 M1 - UNSP 22 ER - TY - GEN T1 - A field test of parametric WLAN-fingerprint-positioning methods AU - Muller, Philip AU - Raitoharju, Matti AU - Piche, Robert N1 - The paper is available in ieeexplore, and will later also appear at http://isif.org/content/conference-proceedings

Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-11-21 PY - 2014 Y1 - 2014 M3 - Conference contribution SN - 978-84-9012-355-3 SP - 1 EP - 8 BT - 17th International Conference on Information Fusion (FUSION), 7-10 July 2014, Salamanca, Spain PB - Institute of Electrical and Electronics Engineers CY - Piscataway ER - TY - GEN T1 - A method to enforce map constraints in a particle filter's position estimate AU - Piche, Robert AU - Koivisto, Mike N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-09-05

Publisher name: IEEE PY - 2014 Y1 - 2014 U2 - 10.1109/WPNC.2014.6843284 DO - 10.1109/WPNC.2014.6843284 M3 - Conference contribution BT - 2014 11th Workshop on Positioning, Navigation and Communication (WPNC), 12-13 March 2014, Dresden, Germany PB - IEEE ER - TY - JOUR T1 - An algebraic study of Peterson´s Intermediate Syllogisms AU - Turunen, Esko N1 - Published online: 21 January 2014

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-04-29

Publisher name: Springer PY - 2014 Y1 - 2014 U2 - 10.1007/s00500-013-1216-2 DO - 10.1007/s00500-013-1216-2 M3 - Article SP - 1 EP - 14 JO - Soft Computing JF - Soft Computing SN - 1432-7643 ER - TY - GEN T1 - A New Controller Structure for Robust Output Regulation AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-18

Publisher name: IEEE PY - 2014 Y1 - 2014 M3 - Conference contribution SN - 978-1-4673-6088-3 T3 - IEEE Conference on Decision and Control SP - 4721 EP - 4726 BT - Proceedings of the 53rd IEEE Conference on Decision and Control, IEEE CDC 2014, 15-17 December, 2014, Los Angeles, CA, USA PB - IEEE ER - TY - JOUR T1 - Another paraconsistent algebraic semantics for Lukasiewicz-Pavelka logic AU - Rodriguez, J. Tinguaro AU - Turunen, Esko AU - Ruan, Da AU - Montero, Javier N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-09-30

Publisher name: Elsevier BV PY - 2014 Y1 - 2014 U2 - 10.1016/j.fss.2013.06.011 DO - 10.1016/j.fss.2013.06.011 M3 - Article VL - 242 SP - 132 EP - 147 JO - Fuzzy Sets and Systems JF - Fuzzy Sets and Systems SN - 0165-0114 ER - TY - GEN T1 - Application of Design Review to Probabilistic Risk Assessment in a Large Investment Project AU - Virtanen, Seppo AU - Penttinen, Jussi-Pekka AU - Kiiski, Mikko AU - Jokinen, Juuso N1 - Contribution: organisation=mei,FACT1=1

Portfolio EDEND: 2014-12-13 PY - 2014 Y1 - 2014 M3 - Conference contribution SP - 1 EP - 12 BT - Proceedings of the Probabilistic Safety Assessment and Management PSAM12, June 2014, Honolulu, Hawaii ER - TY - GEN T1 - Application of Hill-Clohessy-Wiltshire Equation in GNSS Orbit Prediction AU - Zhang, Xiaolong AU - Piche, Robert N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-10-30 PY - 2014 Y1 - 2014 U2 - 10.1109/ICL-GNSS.2014.6934162 DO - 10.1109/ICL-GNSS.2014.6934162 M3 - Conference contribution SN - 978-1-4799-5122-2 SP - 1 EP - 6 BT - Proceedings of 2014 International Conference on Localization and GNSS (ICL-GNSS), Helsinki, Finland, June 24-26, 2014 A2 - Nurmi, Jari A2 - Ruotsalainen, Laura A2 - Lohan, Elena-Simona A2 - Salcedo, Jose A2 - Thombre, Sarang PB - IEEE CY - Piscataway ER - TY - JOUR T1 - A Simple Character String Proof of the "True but Unprovable'' Version of Gödel's First Incompleteness Theorem AU - Valmari, Antti N1 - Paper presented also in the Proceedings of the 14th International Conference Automata and Formal Languages (AFL 2014).

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-11-17

Publisher name: Open Publishing Association PY - 2014 Y1 - 2014 U2 - 10.4204/EPTCS.151.25 DO - 10.4204/EPTCS.151.25 M3 - Article VL - 151 SP - 355 EP - 369 JO - Electronic Proceedings in Theoretical Computer Science JF - Electronic Proceedings in Theoretical Computer Science SN - 2075-2180 M1 - 25 ER - TY - JOUR T1 - Bagdad - matematiikkaa täältä ikuisuuteen matematiikkanäyttely AU - Eriksson, Sirkka-Liisa AU - Vainio, Johanna N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-14 PY - 2014 Y1 - 2014 M3 - Article VL - 2 SP - 17 EP - 46 JO - LUMAT: International Journal on Math, Science and Technology Education JF - LUMAT: International Journal on Math, Science and Technology Education SN - 2323-7112 IS - 1 ER - TY - GEN T1 - Bayesian Methods for Hybrid Indoor Positioning AU - Nurminen, Henri N1 - siirretään 2015

Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2015-01-14 xabstract PY - 2014 Y1 - 2014 M3 - Conference contribution BT - IPIN 2014 - 5th International Conference on Indoor Positioning and Indoor Navigation, 27th - 30 th October, 2014, Busan, South Korea ER - TY - JOUR T1 - Change Detection of Tree Biomass with Terrestrial Laser Scanning and Quantitative Structure Modelling AU - Kaasalainen, Sanna AU - Krooks, Anssi AU - Liski, Jari AU - Raumonen, Pasi AU - Kaartinen, Harri AU - Kaasalainen, Mikko AU - Puttonen, Eetu AU - Anttila, Kati AU - Mäkipää, Raisa N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-09-30

Publisher name: MDPI AG PY - 2014 Y1 - 2014 U2 - 10.3390/rs6053906 DO - 10.3390/rs6053906 M3 - Article VL - 6 SP - 3906 EP - 3922 JO - Remote Sensing JF - Remote Sensing SN - 2072-4292 IS - 5 ER - TY - BOOK T1 - Combinational Studies of Vectors and Sequences AU - Major, Laszlo N1 - Awarding institution:Tampere University of Technology PY - 2014 Y1 - 2014 M3 - Doctoral thesis SN - 978-952-15-3311-2 T3 - Tampere University of Technology. Publication BT - Combinational Studies of Vectors and Sequences PB - Tampere University of Technology CY - Tampere ER - TY - JOUR T1 - Detection of anomalies in radio tomography of asteroids: source count and forward errors AU - Pursiainen, S. AU - Kaasalainen, M. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-17

Publisher name: Pergamon PY - 2014 Y1 - 2014 U2 - 10.1016/j.pss.2014.04.017 DO - 10.1016/j.pss.2014.04.017 M3 - Article VL - 99 SP - 36 EP - 47 JO - Planetary and Space Science JF - Planetary and Space Science SN - 0032-0633 ER - TY - GEN T1 - Evaluating the Consistency of Estimation AU - Ivanov, Pavel AU - Ali-Löytty, Simo AU - Piche, Robert N1 - Contribution: organisation=ase,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2014-11-25 PY - 2014 Y1 - 2014 U2 - 10.1109/ICL-GNSS.2014.6934171 DO - 10.1109/ICL-GNSS.2014.6934171 M3 - Conference contribution SN - 978-1-4799-5122-2 BT - Proceedings of 2014 International Conference on Localization and GNSS (ICL-GNSS), Helsinki, Finland, June 24-26, 2014 PB - IEEE CY - Piscataway ER - TY - JOUR T1 - Gaussian Scale Mixture Models For Robust Linear Multivariate Regression With Missing Data AU - Ala-Luhtala, Juha AU - Piche, Robert N1 - Online first.Accepted author version posted online 19 Jun 2014

Contribution: organisation=mat,FACT1=0.25

Contribution: organisation=ase,FACT2=0.75

Portfolio EDEND: 2014-11-25

Publisher name: Taylor & Francis PY - 2014 Y1 - 2014 N2 - We present an algorithm for multivariate robust Bayesian linear regression with missing data. The iterative algorithm computes an approximative posterior for the model parameters based on the variational Bayes (VB) method. Compared to the EM algorithm, the VB method has the advantage that the variance for the model parameters is also computed directly by the algorithm. We consider three families of Gaussian scale mixture models for the measurements, which include as special cases the multivariate t distribution, the multivariate Laplace distribution, and the contaminated normal model. The observations can contain missing values, assuming that the missing data mechanism can be ignored. A Matlab/Octave implementation of the algorithm is presented and applied to solve threereference examples from the literature. AB - We present an algorithm for multivariate robust Bayesian linear regression with missing data. The iterative algorithm computes an approximative posterior for the model parameters based on the variational Bayes (VB) method. Compared to the EM algorithm, the VB method has the advantage that the variance for the model parameters is also computed directly by the algorithm. We consider three families of Gaussian scale mixture models for the measurements, which include as special cases the multivariate t distribution, the multivariate Laplace distribution, and the contaminated normal model. The observations can contain missing values, assuming that the missing data mechanism can be ignored. A Matlab/Octave implementation of the algorithm is presented and applied to solve threereference examples from the literature. U2 - 10.1080/03610918.2013.875565 DO - 10.1080/03610918.2013.875565 M3 - Article JO - Communications in Statistics: Simulation and Computation JF - Communications in Statistics: Simulation and Computation SN - 0361-0918 ER - TY - JOUR T1 - Indirect Emissions of Forest Bioenergy: Detailed Modelling of Stump-Root Systems AU - Liski, Jari AU - Kaasalainen, Sanna AU - Raumonen, Pasi AU - Akujärvi, Anu AU - Krooks, Anssi AU - Repo, Anna AU - Kaasalainen, Mikko N1 - Article first published online: 26 MAY 2013

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: Wiley-Blackwell PY - 2014 Y1 - 2014 U2 - 10.1111/gcbb.12091 DO - 10.1111/gcbb.12091 M3 - Article VL - 6 SP - 777 EP - 784 JO - Global Change Biology Bioenergy JF - Global Change Biology Bioenergy SN - 1757-1693 IS - 6 ER - TY - CHAP T1 - Integral Formulas for k-hypermonogenic Functions in R3 AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki AU - Nelson, Vieira N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-14

Publisher name: Springer PY - 2014 Y1 - 2014 U2 - 10.1007/978-3-319-08771-9_8 DO - 10.1007/978-3-319-08771-9_8 M3 - Chapter SN - 978-3-319-08770-2 T3 - Trends in Mathematics SP - 119 EP - 132 BT - Hypercomplex Analysis: New Perspectives and Applications PB - Springer ER - TY - GEN T1 - Minimal Solutions of Fuzzy Relation Equations with General Operators on the Unit Interval AU - Medina, Jesus AU - Turunen, Esko AU - Bartl, Eduard AU - Diaz-Moreno, Juan Carlos N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-10-03

Publisher name: Springer International Publishing PY - 2014 Y1 - 2014 U2 - 10.1007/978-3-319-08852-5_9 DO - 10.1007/978-3-319-08852-5_9 M3 - Conference contribution SN - 978-3-319-08851-8 T3 - Communications in Computer and Information Science SP - 81 EP - 90 BT - Information Processing and Management of Uncertainty in Knowledge-Based Systems. 15th International Conference, IPMU 2014, Montpellier, France, July 15-19, 2014, Proceedings, Part III. Communications in Computer and Information Science PB - Springer International Publishing ER - TY - GEN T1 - Modelling of Joule heating based self-alignment method for metal grid line passivation AU - Janka, Marika AU - Raumonen, Pasi AU - Tuukkanen, Sampo AU - Lupo, Donald N1 - Contribution: organisation=elt,FACT1=0.8

Contribution: organisation=mat,FACT2=0.2

Portfolio EDEND: 2014-05-08

Publisher name: Materials Research Society PY - 2014 Y1 - 2014 N2 - A Joule heating based self-alignment method for solution-processable insulator structures has been modeled for the passivation of metal grid lines, for example for organic light emitting diodes or photovoltaic cells. To minimize overhang of the passivation layer from line edges, we have studied the Joule heating approach using solution-processable, cross-linkable polymer insulator films. Finite element simulations were performed to investigate the heating of the sample using glass and poly(ethylene terephthalate) (PET) substrates. The sample was at room temperature and the current was selected to induce a temperature of 410 K at the conductor. It was found that the selection of substrate material is crucial for the localization of cross-linking. For a PET substrate, the temperature gradient at the edge of the conductor is approximately twice the gradient for glass. As a result, using a glass substrate demands high selectivity from the polymer cross-linking, thus making PET a more suitable substrate material for our application. A flexible PET substrate is, in addition, compatible with roll-to-roll mass-manufacturing processes. AB - A Joule heating based self-alignment method for solution-processable insulator structures has been modeled for the passivation of metal grid lines, for example for organic light emitting diodes or photovoltaic cells. To minimize overhang of the passivation layer from line edges, we have studied the Joule heating approach using solution-processable, cross-linkable polymer insulator films. Finite element simulations were performed to investigate the heating of the sample using glass and poly(ethylene terephthalate) (PET) substrates. The sample was at room temperature and the current was selected to induce a temperature of 410 K at the conductor. It was found that the selection of substrate material is crucial for the localization of cross-linking. For a PET substrate, the temperature gradient at the edge of the conductor is approximately twice the gradient for glass. As a result, using a glass substrate demands high selectivity from the polymer cross-linking, thus making PET a more suitable substrate material for our application. A flexible PET substrate is, in addition, compatible with roll-to-roll mass-manufacturing processes. U2 - 10.1557/opl.2014.127 DO - 10.1557/opl.2014.127 M3 - Conference contribution BT - 2013 MRS Fall Meeting - Symposium M - Large-Area Processing and Patterning for Active Optical and Electronic Devices PB - MATERIALS RESEARCH SOCIETY ER - TY - GEN T1 - New era of Business Analytics - Making sense of business ecosystems AU - Jussila, Jari AU - Kärkkäinen, Hannu AU - Kortelainen, Samuli AU - Huhtamäki, Jukka AU - Aho, Timo AU - Tebest, Teemo N1 - Contribution: organisation=tlo,FACT1=0.67

Contribution: organisation=mat,FACT2=0.33

Portfolio EDEND: 2014-12-31

Publisher name: ACM PY - 2014 Y1 - 2014 U2 - 10.1145/2676467.2676517 DO - 10.1145/2676467.2676517 M3 - Conference contribution SN - 978-1-4503-3006-0 T3 - MindTrek Conference SP - 276 EP - 278 BT - Academic MindTrek Conference 2014, Tampere, Finland, November 4-6, 2014 A2 - Lugmayr, Artur A2 - Franssila, Heljä A2 - Paavilainen, Janne PB - ACM CY - New York, NY ER - TY - JOUR T1 - Old and New Algorithms for Minimal Coverability Sets AU - Valmari, Antti AU - Hansen, Henri N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-11-17

Publisher name: IOS Press PY - 2014 Y1 - 2014 U2 - 10.3233/FI-2014-1002 DO - 10.3233/FI-2014-1002 M3 - Article VL - 131 SP - 1 EP - 25 JO - Fundamenta Informaticae JF - Fundamenta Informaticae SN - 0169-2968 IS - 1 ER - TY - GEN T1 - On Convergence and Accuracy of State-Space Approximations of Squared Exponential Covariance Functions AU - Särkkä, Simo AU - Piche, Robert N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-11-21 PY - 2014 Y1 - 2014 U2 - 10.1109/MLSP.2014.6958890 DO - 10.1109/MLSP.2014.6958890 M3 - Conference contribution SN - 978-1-4799-3694-6 SP - 1 EP - 6 BT - 2014 IEEE International Workshop on Machine Learning for Signal Processing (MLSP), September 21-24, 2014, Reims, France PB - Institute of Electrical and Electronics Engineers CY - Piscataway ER - TY - GEN T1 - On polynomial stability of linear systems AU - Paunonen, Lassi AU - Laakkonen, Petteri N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-31

Publisher name: University of Groningen PY - 2014 Y1 - 2014 M3 - Conference contribution SN - 978-90-367-6321-9 T3 - International Symposium on Mathematical Theory of Networks and Systems SP - 233 EP - 238 BT - 21st International Symposium on Mathematical Theory of Networks and Systems, MTNS 2014, July 7-11, 2014, Groningen, the Netherlands PB - University of Groningen CY - Groningen, the Netherlands ER - TY - GEN T1 - On the Structure of Robust Controllers for Infinite-Dimensional Systems AU - Hämäläinen, Timo AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-30

Publisher name: University of Groningen PY - 2014 Y1 - 2014 M3 - Conference contribution SN - 978-90-367-6321-9 SP - 938 EP - 941 BT - 21st International Symposium on Mathematical Theory of Networks and Systems, MTNS 2014, July 7-11, 2014, Groningen, The Netherlands PB - University of Groningen CY - Groningen, the Netherlands ER - TY - JOUR T1 - On Vekua Systems and Their Connections to Hyperbolic Function Theory in the Plane AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-14

Publisher name: Birkhaeuser Science PY - 2014 Y1 - 2014 U2 - 10.1007/s00006-014-0507-8 DO - 10.1007/s00006-014-0507-8 M3 - Article VL - 24 SP - 1027 EP - 1038 JO - Advances in Applied Clifford Algebras JF - Advances in Applied Clifford Algebras SN - 0188-7009 IS - 4 ER - TY - PAT T1 - Optimal storage scheme for access point coverage data AU - Wirola, Lauri AU - Laine, Tommi AU - Raitoharju, Matti AU - Sirola, Niilo N1 - PCT/US2009/001433 : US 8816908 B2 (26.08.2014)

Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2014-12-19 PY - 2014 Y1 - 2014 M3 - Patent M1 - Pat. US 8 816 908 B2 ER - TY - JOUR T1 - Optimization of large-area OLED current distribution grids with self-aligned passivation AU - Janka, M. AU - Saukko, E. AU - Raumonen, P. AU - Lupo, D. N1 - Contribution: organisation=elt,FACT1=0.8

Contribution: organisation=fys,FACT2=0.1

Contribution: organisation=mat,FACT3=0.1

Portfolio EDEND: 2014-11-11

Publisher name: Elsevier BV PY - 2014 Y1 - 2014 U2 - 10.1016/j.orgel.2014.09.028 DO - 10.1016/j.orgel.2014.09.028 M3 - Article VL - 15 SP - 3431 EP - 3438 JO - Organic Electronics JF - Organic Electronics SN - 1566-1199 IS - 12 ER - TY - JOUR T1 - Polynomial stability of semigroups generated by operator matrices AU - Paunonen, Lassi N1 - Published online: 11 July 2014

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-10-20

Publisher name: Birkhaeuser Verlag AG PY - 2014 Y1 - 2014 U2 - 10.1007/s00028-014-0243-5 DO - 10.1007/s00028-014-0243-5 M3 - Article VL - 14 SP - 885 EP - 911 JO - Journal of Evolution Equations JF - Journal of Evolution Equations SN - 1424-3199 IS - 4 ER - TY - JOUR T1 - Predicting tree structure from tree height using terrestrial laser scanning and quantitative structure models AU - Krooks, Anssi AU - Kaasalainen, Sanna AU - Kankare, Ville AU - Joensuu, Marianna AU - Raumonen, Pasi AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-09-30

Publisher name: The Finnish Society of Forest Science PY - 2014 Y1 - 2014 U2 - 10.14214/sf.1125 DO - 10.14214/sf.1125 M3 - Article VL - 48 SP - 1 EP - 11 JO - Silva Fennica JF - Silva Fennica SN - 0037-5330 IS - 2 M1 - 1125 ER - TY - JOUR T1 - Robust controller design for infinite-dimensional exosystems AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Online first

Contribution: organisation=mat,FACT1=1

Publisher name: John Wiley & Sons PY - 2014 Y1 - 2014 U2 - 10.1002/rnc.2920 DO - 10.1002/rnc.2920 M3 - Article VL - 24 SP - 825 EP - 858 JO - International Journal of Robust and Nonlinear Control JF - International Journal of Robust and Nonlinear Control SN - 1049-8923 IS - 5 ER - TY - GEN T1 - Robustness of Controllers for SISO-Plants and Signals Generated by an Infinite-Dimensional Exosystem AU - Laakkonen, Petteri AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-16

Publisher name: IEEE PY - 2014 Y1 - 2014 U2 - 10.1109/MMAR.2014.6957411 DO - 10.1109/MMAR.2014.6957411 M3 - Conference contribution SN - 978-1-4799-5082-9 T3 - International conference on methods and models in automation and robotics SP - 538 EP - 543 BT - 19th International Conference on Methods and Models in Automation and Robotics, MMAR 2014, Miedzyzdroje, Poland, September 2-5, 2014 PB - IEEE ER - TY - JOUR T1 - Robustness of strong stability of semigroups AU - Paunonen, Lassi N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-10-20

Publisher name: Academic Press PY - 2014 Y1 - 2014 U2 - 10.1016/j.jde.2014.08.011 DO - 10.1016/j.jde.2014.08.011 M3 - Article VL - 257 SP - 4403 EP - 4436 JO - Journal of Differential Equations JF - Journal of Differential Equations SN - 0022-0396 IS - 12 ER - TY - JOUR T1 - Shape reconstruction from images: Pixel fields and Fourier transform AU - Viikinkoski, Matti AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-17

Publisher name: American Institute of Mathematical Sciences PY - 2014 Y1 - 2014 U2 - 10.3934/ipi.2014.8.885 DO - 10.3934/ipi.2014.8.885 M3 - Article VL - 8 SP - 885 EP - 900 JO - Inverse Problems and Imaging JF - Inverse Problems and Imaging SN - 1930-8337 IS - 3 ER - TY - JOUR T1 - Sparse source travel-time tomography of a laboratory target: accuracy and robustness of anomaly detection AU - Pursiainen, S. AU - Kaasalainen, M. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-17

Publisher name: Institute of Physics Publishing PY - 2014 Y1 - 2014 U2 - 10.1088/0266-5611/30/11/114016 DO - 10.1088/0266-5611/30/11/114016 M3 - Article VL - 30 SP - 1 EP - 19 JO - Inverse Problems JF - Inverse Problems SN - 0266-5611 IS - 11 M1 - 114016 ER - TY - JOUR T1 - Taivaalliset projektiot: terapiaa imversio-ongelmaisille AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-17

Publisher name: Suomen Fyysikkoseura PY - 2014 Y1 - 2014 M3 - Article SP - 25 EP - 31 JO - Arkhimedes JF - Arkhimedes SN - 0004-1920 IS - 4 ER - TY - JOUR T1 - The Cauchy-Schwarz inequality in Cayley graph and tournament structures on finite fields AU - Foldes, Stephan AU - Major, Laszlo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-21

Publisher name: Miskolci Egyetem PY - 2014 Y1 - 2014 M3 - Article VL - 15 SP - 153 EP - 158 JO - Miskolc Mathematical Notes JF - Miskolc Mathematical Notes SN - 1787-2405 IS - 1 ER - TY - JOUR T1 - The Internal Model Principle for Systems with Unbounded Control and Observation AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-31

Publisher name: Society for Industrial and Applied Mathematics PY - 2014 Y1 - 2014 U2 - 10.1137/130921362 DO - 10.1137/130921362 M3 - Article VL - 52 SP - 3967 EP - 4000 JO - SIAM Journal on Control and Optimization JF - SIAM Journal on Control and Optimization SN - 0363-0129 IS - 6 ER - TY - JOUR T1 - The puzzling mutual orbit of the binary Trojan asteroid (624) Hektor AU - Marchis, F. AU - Durech, J. AU - Castillo-Rogez, J. AU - Vachier, F. AU - Cuk, M. AU - Berthier, J. AU - Wong, M.H. AU - Kalas, P. AU - Duchene, G. AU - Van Dam, M.A. AU - Hamanowa, H. AU - Viikinkoski, M. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2015-01-13

Publisher name: Institute of Physics Publishing Ltd. PY - 2014 Y1 - 2014 U2 - 10.1088/2041-8205/783/2/L37 DO - 10.1088/2041-8205/783/2/L37 M3 - Article VL - 783 JO - Astrophysical Journal Letters JF - Astrophysical Journal Letters SN - 2041-8205 IS - 2 ER - TY - JOUR T1 - The Role of Exosystems in Output Regulation AU - Paunonen, Lassi N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-10-20

Publisher name: IEEE PY - 2014 Y1 - 2014 U2 - 10.1109/TAC.2014.2303214 DO - 10.1109/TAC.2014.2303214 M3 - Article VL - 59 SP - 2301 EP - 2305 JO - IEEE Transactions on Automatic Control JF - IEEE Transactions on Automatic Control SN - 0018-9286 IS - 8 ER - TY - JOUR T1 - Tree Root System Characterization and Volume Estimation by Terrestrial Laser Scanning and Quantitative Structure Modeling AU - Smith, Aaron AU - Astrup, Rasmus AU - Raumonen, Pasi AU - Liski, Jari AU - Krooks, Anssi AU - Kaasalainen, Sanna AU - Åkerblom, Markku AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-12-17

Publisher name: MDPI AG PY - 2014 Y1 - 2014 U2 - 10.3390/f5123274 DO - 10.3390/f5123274 M3 - Article VL - 5 SP - 3274 EP - 3294 JO - Forests: Open Access Journal JF - Forests: Open Access Journal SN - 1999-4907 ER - TY - GEN T1 - Visualizing informal learning behavior from conference participants Twitter data AU - Aramo-Immonen, Heli AU - Jussila, Jari AU - Huhtamäki, Jukka N1 - Contribution: organisation=pla,FACT1=0.34

Contribution: organisation=tlo,FACT2=0.33

Contribution: organisation=mat,FACT3=0.33

Portfolio EDEND: 2014-12-30

Publisher name: ACM PY - 2014 Y1 - 2014 U2 - 10.1145/2669711.2669962 DO - 10.1145/2669711.2669962 M3 - Conference contribution SN - 978-1-4503-2896-8 T3 - International Conference on Technological Ecosystems for Enhancing Multiculturality SP - 603 EP - 610 BT - Second International Conference on Technological Ecosystems for Enhancing Multiculturality, TEEM 2014, Salamanca, Spain, October 1-3, 2014 A2 - Francisco Jose, Garcia-Penalvo PB - ACM CY - New York, NY ER - TY - GEN T1 - Visual network analysis of Twitter data for co-organizing conferences: case CMAD 2013 AU - Jussila, Jari AU - Huhtamäki, Jukka AU - Henttonen, Kaisa AU - Kärkkäinen, Hannu AU - Still, Kaisa N1 - Contribution: organisation=tlo,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2014-03-15

Publisher name: Computer Society Press PY - 2014 Y1 - 2014 N2 - The aim of this research is to explore what kinds of insights information visualization of social media data can provide for co-organizing conferences. Our paper focuses on Twitter use before, during and after conference. We present a case study based on an conference of Community Manager Appreciation Day (CMAD 2013). With the process of data-driven visual network analysis, we used Twitter data to analyse the network of conference participants and the conference’s discussion topics. We were able to identify e.g. influential conference participants, most interesting presentations and discussions, similarities between interests of the conference participants. Hence, several development and information needs of conference co-organization were derived from the information visualizations, which have implications for improving the planning and co-organizing of conferences, as well as for Twitter use in conference communication. AB - The aim of this research is to explore what kinds of insights information visualization of social media data can provide for co-organizing conferences. Our paper focuses on Twitter use before, during and after conference. We present a case study based on an conference of Community Manager Appreciation Day (CMAD 2013). With the process of data-driven visual network analysis, we used Twitter data to analyse the network of conference participants and the conference’s discussion topics. We were able to identify e.g. influential conference participants, most interesting presentations and discussions, similarities between interests of the conference participants. Hence, several development and information needs of conference co-organization were derived from the information visualizations, which have implications for improving the planning and co-organizing of conferences, as well as for Twitter use in conference communication. U2 - 10.1109/HICSS.2014.190 DO - 10.1109/HICSS.2014.190 M3 - Conference contribution T3 - Annual Hawaii International Conference on System Sciences SP - 1474 EP - 1483 BT - 47th Hawaii International Conference on System Sciences, HICSS 2014, 6.-9.1.2014, Waikoloa, HI PB - Computer Society Press ER - TY - BOOK T1 - Robust Regulation for Infinite-Dimensional Systems and Signals in the Frequency Domain AU - Laakkonen, Petteri N1 - Awarding institution:Tampere University of Technology PY - 2013/10/25 Y1 - 2013/10/25 N2 - In this thesis, the robust output regulation problem is studied both in the time domain and in the frequency domain. The problem to be addressed is to find a stabilizing controller for a given plant so that every signal generated by an exogenous system, or shortly exosystem, is asymptotically tracked despite perturbations in the plant or some external disturbances. The exosystem generating the reference and disturbance signals is assumed to be infinite-dimensional. The main contribution of this thesis is to develop the robust regulation theory for an infinite-dimensional exosystem in the frequency domain framework. In order to do that, the time domain theory is studied in some detail and new results that emphasize the smoothness requirement on the reference and disturbance signals due to infinite-dimensionality of the exosystem are presented. Two types of controllers are studied, the feedforward controllers and the error feedback controllers, the latter of which facilitate robust regulation. These results exploit the structure at infinity of tha plant transfer function. In this thesis, a new definition of the structure at infinity suitable for infinite-dimensional systems is developed and its properties are studied. The frequency domain theory developed is based on the insights into the corresponding time domain theory. By following some recent time domain ideas the type of robustness and stability types are chosen so that they facilitate the use of an infinite-dimensional exosystem. The robustness is understood in the sense that stability should imply regulation. The chosen stability types resemble the time domain polynomial and strong stabilities and allow robust regulation of signals that have an infinite number of unstable dynamics along with transfer functions vanishing at infinity. The main contribution of this thesis is the formulation of the celebrated internal model principle in the frequency domain terms in a rather abstract algebraic setting. Unlike in the existing literature, no topological aspect of the problem is needed because of the adopted definition of robustness. The plant transfer function is only assumed to have a right or a left coprime factorization but not necessarily both. The internal model principle leads to a necessary and sufficient condition for the solvability of the robust regulation problem. The second main contribution of the thesis is to design frequency domain controllers for infinite-dimensional systems and exosystems. In this thesis, the Davison’s simple controller design for stable plants is extended to infinite-dimensional systems and exosystems. Then a controller design procedure for unstable plants containing two phases is proposed. In the first phase, a stabilizing controller is constructed for a given plant. The second phase is to design a robustly regulating controller for a stable part of the plant. This design procedure nicely combines with the Davison’s type controllers and is especially suitable for infinite-dimensional plants with transfer functions in the Callier-Desoer class of transfer functions. AB - In this thesis, the robust output regulation problem is studied both in the time domain and in the frequency domain. The problem to be addressed is to find a stabilizing controller for a given plant so that every signal generated by an exogenous system, or shortly exosystem, is asymptotically tracked despite perturbations in the plant or some external disturbances. The exosystem generating the reference and disturbance signals is assumed to be infinite-dimensional. The main contribution of this thesis is to develop the robust regulation theory for an infinite-dimensional exosystem in the frequency domain framework. In order to do that, the time domain theory is studied in some detail and new results that emphasize the smoothness requirement on the reference and disturbance signals due to infinite-dimensionality of the exosystem are presented. Two types of controllers are studied, the feedforward controllers and the error feedback controllers, the latter of which facilitate robust regulation. These results exploit the structure at infinity of tha plant transfer function. In this thesis, a new definition of the structure at infinity suitable for infinite-dimensional systems is developed and its properties are studied. The frequency domain theory developed is based on the insights into the corresponding time domain theory. By following some recent time domain ideas the type of robustness and stability types are chosen so that they facilitate the use of an infinite-dimensional exosystem. The robustness is understood in the sense that stability should imply regulation. The chosen stability types resemble the time domain polynomial and strong stabilities and allow robust regulation of signals that have an infinite number of unstable dynamics along with transfer functions vanishing at infinity. The main contribution of this thesis is the formulation of the celebrated internal model principle in the frequency domain terms in a rather abstract algebraic setting. Unlike in the existing literature, no topological aspect of the problem is needed because of the adopted definition of robustness. The plant transfer function is only assumed to have a right or a left coprime factorization but not necessarily both. The internal model principle leads to a necessary and sufficient condition for the solvability of the robust regulation problem. The second main contribution of the thesis is to design frequency domain controllers for infinite-dimensional systems and exosystems. In this thesis, the Davison’s simple controller design for stable plants is extended to infinite-dimensional systems and exosystems. Then a controller design procedure for unstable plants containing two phases is proposed. In the first phase, a stabilizing controller is constructed for a given plant. The second phase is to design a robustly regulating controller for a stable part of the plant. This design procedure nicely combines with the Davison’s type controllers and is especially suitable for infinite-dimensional plants with transfer functions in the Callier-Desoer class of transfer functions. M3 - Doctoral thesis SN - 978-952-15-3169-9 T3 - Tampere University of Technology. Publication BT - Robust Regulation for Infinite-Dimensional Systems and Signals in the Frequency Domain PB - Tampere University of Technology CY - Tampere ER - TY - JOUR T1 - A Hyperbolic Dirac Operator and its Kernels AU - Eriksson, Sirkka-Liisa N1 - Taylor&Francis Online first: Forthcoming articles 12.10.2011.Poistettu Portfolio13:sta tupla r=1849.

Contribution: organisation=mat,FACT1=1 PY - 2013 Y1 - 2013 U2 - 10.1080/17476933.2011.620096 DO - 10.1080/17476933.2011.620096 M3 - Article VL - 58 SP - 767 EP - 781 JO - Complex Variables and Elliptic Equations JF - Complex Variables and Elliptic Equations SN - 1747-6933 IS - 6 ER - TY - GEN T1 - A linear state model for PDR+WLAN positioning AU - Raitoharju, Matti AU - Nurminen, Henri AU - Piche, Robert N1 - to appear in IEEEXPLORE

Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2013-10-29 PY - 2013 Y1 - 2013 N2 - Indoor positioning based on WLAN signals is often enhanced using pedestrian dead reckoning (PDR) based on an inertial measurement unit. The state evolution model in PDR is usually nonlinear. We present a new linear state evolution model for PDR. In simulated-data and real-data tests of tightly coupled WLAN-PDR positioning, we find that the positioning accuracy with this linear model is almost as good as with traditional models when the initial state is known, and better when the initial state is not known. The proposed method is computationally light and is also suitable for smoothing. AB - Indoor positioning based on WLAN signals is often enhanced using pedestrian dead reckoning (PDR) based on an inertial measurement unit. The state evolution model in PDR is usually nonlinear. We present a new linear state evolution model for PDR. In simulated-data and real-data tests of tightly coupled WLAN-PDR positioning, we find that the positioning accuracy with this linear model is almost as good as with traditional models when the initial state is known, and better when the initial state is not known. The proposed method is computationally light and is also suitable for smoothing. M3 - Conference contribution SN - 979-10-92279-02-3 T3 - Conference on Design and Architectures for Signal and Image Processing SP - 113 EP - 118 BT - Proceedings of the 2013 Conference on Design and Architectures for Signal and Image Processing DASIP Cagliari, Italy, October 8-10, 2013 A2 - Morawiec, Adam A2 - Hinderscheit, Jinnie PB - European Electronic Chips & Systems Design Initiative (ECSI) CY - Belmont France ER - TY - JOUR T1 - A Lyapunov approach to strong stability of semigroups AU - Paunonen, Lassi AU - Zwart, Hans N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: Elsevier PY - 2013 Y1 - 2013 N2 - In this paper we present Lyapunov based proofs for the well-known Arendt-Batty-Lyubich-Vu Theorem for strongly continuous and discrete semigroups. We also study the spectral properties of the limit isometric groups used in the proofs. AB - In this paper we present Lyapunov based proofs for the well-known Arendt-Batty-Lyubich-Vu Theorem for strongly continuous and discrete semigroups. We also study the spectral properties of the limit isometric groups used in the proofs. U2 - 10.1016/j.sysconle.2013.05.001 DO - 10.1016/j.sysconle.2013.05.001 M3 - Article VL - 62 SP - 673 EP - 678 JO - Systems and Control Letters JF - Systems and Control Letters SN - 0167-6911 IS - 8 ER - TY - JOUR T1 - A note on compactness in a fuzzy metric space AU - Kaleva, Osmo AU - Kauhanen, Janne N1 - In Press, Corrected Proof.Accepted 29 May 2013.

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-10-29 PY - 2013 Y1 - 2013 U2 - 10.1016/j.fss.2013.05.014 DO - 10.1016/j.fss.2013.05.014 M3 - Article SP - 135 EP - 139 JO - Fuzzy Sets and Systems JF - Fuzzy Sets and Systems SN - 0165-0114 M1 - 238 ER - TY - JOUR T1 - Antichain Cutsets of Strongly Connected Posets AU - Foldes, Stephan AU - Woodroofe, Russ N1 - Online first.Poistettu Portfolio13:sta tupla r=2900.

Contribution: organisation=mat,FACT1=1

Publisher name: Springer Netherlands PY - 2013 Y1 - 2013 U2 - 10.1007/s11083-012-9248-2 DO - 10.1007/s11083-012-9248-2 M3 - Article VL - 30 SP - 351 EP - 361 JO - Order: A Journal on the Theory of Ordered Sets and Its Applications JF - Order: A Journal on the Theory of Ordered Sets and Its Applications SN - 0167-8094 IS - 2 ER - TY - GEN T1 - Bandwidth and Storage Reduction of Radio Maps for Offline WLAN Positioning AU - Wirola, Laura AU - Wirola, Lauri AU - Piche, Robert N1 - to appear in IEEEXPLORE

Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: IEEE PY - 2013 Y1 - 2013 N2 - Most of the existing mobile device positioning methods require data connectivity, i.e. they work in the mobile-assisted, or online mode. However, this consumes energy, induces transmission costs and results in unnecessarily long time-to-first-fix. These issues can be alleviated using mobile-based, or offline, mode. In this mode the device carries a subset of the global radio map in memory for fast positioning without data connection. The challenge of this approach is the large size of the offline radio map that needs to be downloaded, stored and updated periodically in the mobile device. This paper presents a method to find the significant APs in the global radio map and proposes using only those in offline positioning in order to compress the size of the required offline radio map. We also propose a method to further compress the size of the offline radio map by hashing the globally unique AP BSSIDs into locally unique shortened BSSIDs. We test the proposed methods with real-world data. AB - Most of the existing mobile device positioning methods require data connectivity, i.e. they work in the mobile-assisted, or online mode. However, this consumes energy, induces transmission costs and results in unnecessarily long time-to-first-fix. These issues can be alleviated using mobile-based, or offline, mode. In this mode the device carries a subset of the global radio map in memory for fast positioning without data connection. The challenge of this approach is the large size of the offline radio map that needs to be downloaded, stored and updated periodically in the mobile device. This paper presents a method to find the significant APs in the global radio map and proposes using only those in offline positioning in order to compress the size of the required offline radio map. We also propose a method to further compress the size of the offline radio map by hashing the globally unique AP BSSIDs into locally unique shortened BSSIDs. We test the proposed methods with real-world data. M3 - Conference contribution T3 - International Conference on Indoor Positioning and Indoor Navigation SP - 665 EP - 673 BT - International Conference on Indoor Positioning and Indoor Navigation, IPIN 2013, 28-31 Oct 2013, Montbéliard-Belfort, France PB - IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Bayesian analysis of GUHA hypotheses AU - Piche, Robert AU - Järvenpää, Marko AU - Turunen, Esko AU - Simunek, Milan N1 - Online first

Contribution: organisation=ase,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2013-07-29

Publisher name: Springer PY - 2013 Y1 - 2013 U2 - 10.1007/s10844-013-0255-6 DO - 10.1007/s10844-013-0255-6 M3 - Article VL - 42 SP - 47 EP - 73 JO - Journal of Intelligent Information Systems JF - Journal of Intelligent Information Systems SN - 0925-9902 IS - 1 ER - TY - GEN T1 - Bayes trees and forests: combining precise empirical and theoretical tree models AU - Kaasalainen, Mikko AU - Potapov, Ilya AU - Raumonen, Pasi AU - Åkerblom, Markku AU - Sievänen, Risto AU - Kaasalainen, Sanna N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Finnish Society of Forest Science; Finnish Forest Research Institute; University of Helsinki PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-951-651-408-9 T3 - International Conference on Functional-Structural Plant Models SP - 61 EP - 63 BT - 7th International Conference on Functional-Structural Plant Models, FSPM2013, FSPM2013, 9.-14.6.2013, Saariselkä, Finland A2 - Sievänen, R. A2 - Nikinmaa, E. A2 - Godin, C. A2 - Lintunen, A. A2 - Nygren, P. PB - Finnish Society of Forest Science; Finnish Forest Research Institute; University of Helsinki CY - Vantaa ER - TY - JOUR T1 - Canonical methods of constructing invariant tori by phase-space sampling AU - Laakso, T. AU - Kaasalainen, M. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Elsevier PY - 2013 Y1 - 2013 U2 - 10.1016/j.physd.2012.09.010 DO - 10.1016/j.physd.2012.09.010 M3 - Article VL - 243 SP - 14 EP - 19 JO - Physica D: Nonlinear Phenomena JF - Physica D: Nonlinear Phenomena SN - 0167-2789 IS - 1 ER - TY - GEN T1 - Challenges in Heterogeneous Web Data Analytics - Case Finnish Growth Companies in Social Media AU - Salonen, Jaakko AU - Huhtamäki, Jukka AU - Nykänen, Ossi N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: ACM PY - 2013 Y1 - 2013 N2 - Diverse data about various phenomena are implicitly available in the modern web. In particular websites categorized as social media provide rich and heterogeneous data about various entities such as people, corporations, brands as well as their properties and relationships. An analyst who seeks to leverage this diverse data is faced with the challenge of integrating and making sense of a set of heterogeneous data sources. In this paper, we provide an introduction and a problem statement for heterogeneous web data analytics. To further highlight and discuss practical challenges, we introduce a case study of Finnish growth companies in social media. Instead of a purely data-driven approach, the presented approach is rooted in the idea that an analyst can actively participate in the data collection and integration process, while the process can still retain repeatability and transparency. The key contribution of this paper is the statement of the challenges related to heterogeneous web data analytics. AB - Diverse data about various phenomena are implicitly available in the modern web. In particular websites categorized as social media provide rich and heterogeneous data about various entities such as people, corporations, brands as well as their properties and relationships. An analyst who seeks to leverage this diverse data is faced with the challenge of integrating and making sense of a set of heterogeneous data sources. In this paper, we provide an introduction and a problem statement for heterogeneous web data analytics. To further highlight and discuss practical challenges, we introduce a case study of Finnish growth companies in social media. Instead of a purely data-driven approach, the presented approach is rooted in the idea that an analyst can actively participate in the data collection and integration process, while the process can still retain repeatability and transparency. The key contribution of this paper is the statement of the challenges related to heterogeneous web data analytics. U2 - 10.1145/2523429.2523481 DO - 10.1145/2523429.2523481 M3 - Conference contribution SN - 978-1-4503-1992-8 T3 - MindTrek Conference SP - 131 EP - 138 BT - 17th International Academic MindTrek Conference, October 1-4, 2013, Tampere, Finland PB - ACM ER - TY - JOUR T1 - Compact YORP formulation and stability analysis AU - Kaasalainen, M. AU - Nortunen, H. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: EDP Sciences PY - 2013 Y1 - 2013 U2 - 10.1051/0004-6361/201322221 DO - 10.1051/0004-6361/201322221 M3 - Article VL - 558 SP - 1 EP - 8 JO - Astronomy and Astrophysics JF - Astronomy and Astrophysics SN - 0004-6361 M1 - A104 ER - TY - GEN T1 - Datamap Visualization Technique for Interactively Visualizing Large Datasets AU - Nykänen, Ossi N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: ACM PY - 2013 Y1 - 2013 U2 - 10.1145/2523429.2523458 DO - 10.1145/2523429.2523458 M3 - Conference contribution SN - 978-1-4503-1992-8 T3 - MindTrek Conference SP - 52 EP - 58 BT - 17th International Academic MindTrek Conference, October 1-4, 2013, Tampere, Finland A2 - Lugmayr, Artur A2 - Franssila, Heljä A2 - Kärkkäinen, Hannu A2 - Paavilainen, Janne PB - ACM ER - TY - JOUR T1 - Device self-calibration in location systems using signal strength histograms AU - Laoudias, Christos AU - Piche, Robert AU - Panayiotou, Christos G. N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: Taylor & Francis PY - 2013 Y1 - 2013 U2 - 10.1080/17489725.2013.816792 DO - 10.1080/17489725.2013.816792 M3 - Article VL - 7 SP - 165 EP - 181 JO - Journal of Location Based Services JF - Journal of Location Based Services SN - 1748-9725 IS - 3 ER - TY - GEN T1 - Estimating Above Ground Biomass from Terrestrial Laser Scanning in Autralian Eucalypt Open Forest AU - Calders, Kim AU - Newnham, Glenn AU - Herold, Martin AU - Murphy, Simon AU - Culvenor, Darius AU - Raumonen, Pasi AU - Burt, Andrew AU - Armston, John AU - Avitabile, Valerio AU - Disney, Mathias N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Silvilaser Beijing 2013 PY - 2013 Y1 - 2013 M3 - Conference contribution T3 - International Conference on LiDAR Applications for Assessing Forest Ecosystems SP - 1 EP - 7 BT - 13th International Conference on LiDAR Applications for Assessing Forest Ecosystems, SilviLaser 2013, 9.-11.10.2013. Beijing, China PB - Silvilaser Beijing 2013 CY - Beijing, China ER - TY - GEN T1 - Estimation of initial state and model parameters for autonomous GNSS orbit prediction AU - Ala-Luhtala, Juha AU - Seppänen, Mari AU - Ali-Löytty, Simo AU - Piche, Robert AU - Nurminen, Henri N1 - Book of Abstracts: http://issuu.com/robhen7979/docs/2013bookofabstracts.doc

Contribution: organisation=mat,FACT1=0.5

Contribution: organisation=ase,FACT2=0.5

Portfolio EDEND: 2013-07-29

Publisher name: IGNSS Society PY - 2013 Y1 - 2013 N2 - In self-assisted GNSS the orbit of a satellite is predicted by solving the differential equation that models its motion. Our motion model includes the most important forces: Earth's gravity, lunar and solar gravity and solar radiation pressure. Unmodeled forces are taken into account by using Gaussian white noise term with covariance matrix estimated offline from historical orbital data. The estimation of model parameters (solar radiation pressure and Earth orientation parameters) and initial state for the prediction includes both offline and online stages. In the offline stage, priors for the solar radiation pressure parameters are estimated using precise orbits issued by the International GNSS service (IGS). In the online stage, the satellite’s broadcast ephemeris is used to estimate the initial state and model parameters. The estimation of the initial state is formulated as non-linear continuous-time filtering problem with discrete-time measurements. The filtering equations are solved numerically and the performance of different numerical methods (Extended, Cubature and Unscented Kalman filters) is compared. Using the estimated initial state and model parameters, the satellite orbits are predicted 5 days into the future. The accuracy and consistency of the predicted orbits is analysed by comparing with the IGS precise ephemerides. In this paper only GPS satellites are considered, but the method can be extended to other satellite systems. AB - In self-assisted GNSS the orbit of a satellite is predicted by solving the differential equation that models its motion. Our motion model includes the most important forces: Earth's gravity, lunar and solar gravity and solar radiation pressure. Unmodeled forces are taken into account by using Gaussian white noise term with covariance matrix estimated offline from historical orbital data. The estimation of model parameters (solar radiation pressure and Earth orientation parameters) and initial state for the prediction includes both offline and online stages. In the offline stage, priors for the solar radiation pressure parameters are estimated using precise orbits issued by the International GNSS service (IGS). In the online stage, the satellite’s broadcast ephemeris is used to estimate the initial state and model parameters. The estimation of the initial state is formulated as non-linear continuous-time filtering problem with discrete-time measurements. The filtering equations are solved numerically and the performance of different numerical methods (Extended, Cubature and Unscented Kalman filters) is compared. Using the estimated initial state and model parameters, the satellite orbits are predicted 5 days into the future. The accuracy and consistency of the predicted orbits is analysed by comparing with the IGS precise ephemerides. In this paper only GPS satellites are considered, but the method can be extended to other satellite systems. M3 - Conference contribution SP - 1 EP - 15 BT - International Global Navigation Satellite Systems Society IGNSS Symposium 2013, 16-18 July, 2013, Gold Coast, Queensland, Australia PB - IGNSS Society CY - Tweed Heads, NSW, Australia ER - TY - CHAP T1 - Estimation of Model Parameters AU - Piche, Robert N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2013-05-29 PY - 2013 Y1 - 2013 M3 - Chapter SN - 978-1-1182-9441-3 SP - 169 EP - 190 BT - Mathematical Modeling with Multidisciplinary Applications A2 - Yang, Xin-She PB - John Wiley & Sons CY - Hoboken, NJ, USA ER - TY - CHAP T1 - Estimation of the Mechanical Power of a Kite Wind Generator AU - Rautakorpi, Pauli AU - Argatov, Ivan AU - Silvennoinen, Risto N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29 PY - 2013 Y1 - 2013 M3 - Chapter SN - 978-1-922227-10-2 SP - 1 EP - 28 BT - Renewable Energy for Sustainable Future A2 - Lohani, Sunil Prasad PB - ICONCEPT PRESS CY - Hong Kong ER - TY - GEN T1 - Fast Automatic Method for Constructing Topologically and Geometrically Precise Tree Models from TLS Data AU - Raumonen, Pasi AU - Casella, Eric AU - Disney, Mathias AU - Åkerblom, Markku AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: Finnish Society of Forest Science; Finnish Forest Research Institute; University of Helsinki PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-951-651-408-9 T3 - International Conference on Functional-Structural Plant Models SP - 89 EP - 91 BT - 7th International Conference on Functional-Structural Plant Models, FSPM2013, 9.-14.6.2013, Saariselkä, Finland A2 - Sievänen, R. A2 - Nikinmaa, E. A2 - Godin, C. A2 - Lintunen, A. A2 - Nygren, P. PB - Finnish Society of Forest Science; Finnish Forest Research Institute; University of Helsinki CY - Vantaa ER - TY - JOUR T1 - Fast automatic precision tree models from terrestrial laser scanner data AU - Raumonen, Pasi AU - Kaasalainen, Mikko AU - Åkerblom, Markku AU - Kaasalainen, Sanna AU - Kaartinen, Harri AU - Vastaranta, Mikko AU - Holopainen, Markus AU - Disney, Mathia AU - Lewis, Philip N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: MDPI PY - 2013 Y1 - 2013 U2 - 10.3390/rs5020491 DO - 10.3390/rs5020491 M3 - Article VL - 5 SP - 491 EP - 520 JO - Remote Sensing JF - Remote Sensing SN - 2072-4292 IS - 2 ER - TY - JOUR T1 - Hyperbolic Laplace Operator and the Weinstein Equation in R^3 AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Online first; Published online: 22 October 2013

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: Springer PY - 2013 Y1 - 2013 U2 - 10.1007/s00006-013-0425-1 DO - 10.1007/s00006-013-0425-1 M3 - Article SP - 1 EP - 16 JO - Advances in Applied Clifford Algebras JF - Advances in Applied Clifford Algebras SN - 0188-7009 ER - TY - GEN T1 - Improving engineering students' mathematics skills and analysing their behaviour using ICT - tools. AU - Pohjolainen, Seppo AU - Nykänen, Ossi AU - Venho, Janne AU - Kangas, Jussi N1 - Poistettu tupla r=2983

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: European Society for Engineering Education SEFI PY - 2013 Y1 - 2013 M3 - Conference contribution T3 - Annual Conference of the European Society for Engineering Education SP - 1 EP - 8 BT - Proceedings of annual SEFI Conference, 16-20 September 2013, Leuven, Belgium PB - European Society for Engineering Education SEFI CY - Brussels, Belgium ER - TY - GEN T1 - Information visualization of Twitter data for co-organizing conferences AU - Jussila, Jari AU - Huhtamäki, Jukka AU - Kärkkäinen, Hannu AU - Still, Kaisa N1 - Contribution: organisation=tlo,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2013-12-29

Publisher name: ACM PY - 2013 Y1 - 2013 N2 - The aim of this research is to explore what kinds of insights information visualization of social media data can provide for co-organizing conferences. Our paper focuses on Twitter in ‘during-conference’ use. We present a case study based on CMAD2013 conference and on the tweet traffic during the conference day. We applied the process of data-driven visual network analysis for providing insights on Twitter use during CMAD2013 conference day. By analyzing the network of conference participants and the conference’s discussion topics, we were able to identify e.g. influential conference delegates, most interesting presentations and discussions, similarities between interests of the conference participants, and several development and information needs of conference co-organization derived from the information visualizations, which have implications for the planning and co-organizing of conferences, as well as for Twitter use in communicating during conferences. AB - The aim of this research is to explore what kinds of insights information visualization of social media data can provide for co-organizing conferences. Our paper focuses on Twitter in ‘during-conference’ use. We present a case study based on CMAD2013 conference and on the tweet traffic during the conference day. We applied the process of data-driven visual network analysis for providing insights on Twitter use during CMAD2013 conference day. By analyzing the network of conference participants and the conference’s discussion topics, we were able to identify e.g. influential conference delegates, most interesting presentations and discussions, similarities between interests of the conference participants, and several development and information needs of conference co-organization derived from the information visualizations, which have implications for the planning and co-organizing of conferences, as well as for Twitter use in communicating during conferences. U2 - 10.1145/2523429.2523482 DO - 10.1145/2523429.2523482 M3 - Conference contribution SN - 978-1-4503-1992-8 T3 - MindTrek Conference SP - 139 EP - 145 BT - 17th International Academic MindTrek Conference, October 1-4, 2013, Tampere, Finland PB - ACM CY - New York, NY ER - TY - BOOK T1 - Introduction to Statistical Data Analysis for Engineers and Scientists AU - Piche, Robert N1 - Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2013-05-29 PY - 2013 Y1 - 2013 M3 - Book BT - Introduction to Statistical Data Analysis for Engineers and Scientists PB - CREATESPACE CY - Las Vegas, NV, USA ER - TY - JOUR T1 - Iterative alternating sequential (IAS) method for radio tomography of asteroids in 3D AU - Pursiainen, S. AU - Kaasalainen, M. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Pergamon PY - 2013 Y1 - 2013 U2 - 10.1016/j.pss.2013.04.001 DO - 10.1016/j.pss.2013.04.001 M3 - Article VL - 82-83 SP - 84 EP - 98 JO - Planetary and Space Science JF - Planetary and Space Science SN - 0032-0633 ER - TY - GEN T1 - Least-Squares Transformations between Point-Sets AU - Rutanen, Kalle AU - Gomez-Herrero, German AU - Eriksson, Sirkka-Liisa AU - Egiazarian, Karen N1 - Contribution: organisation=mat,FACT1=0.5

Contribution: organisation=sgn,FACT2=0.5

Portfolio EDEND: 2013-10-29 PY - 2013 Y1 - 2013 U2 - 10.1007/978-3-642-38886-6_47 DO - 10.1007/978-3-642-38886-6_47 M3 - Conference contribution SN - 978-3-642-38885-9 T3 - Lecture Notes in Computer Science SP - 501 EP - 511 BT - Image Analysis, 18th Scandinavian Conference, SCIA 2013, Espoo, Finland, June 17-20, 2013, Proceedings A2 - Kämäräinen, Joni-Kristian A2 - Koskela, Markus PB - Springer CY - Berlin ER - TY - JOUR T1 - Manifolds in electromagnetism and superconductor modelling: Using their properties to model critical current of twisted conductors in self-field with 2-D model AU - Stenvall, A. AU - Tarhasaari, T. AU - Grilli, F. AU - Raumonen, P. AU - Vojenciak, M. AU - Pellikka, M. N1 - Contribution: organisation=dee,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2013-04-29

Publisher name: Pergamon PY - 2013 Y1 - 2013 U2 - 10.1016/j.cryogenics.2012.06.005 DO - 10.1016/j.cryogenics.2012.06.005 M3 - Article VL - 53 SP - 135 EP - 141 JO - Cryogenics JF - Cryogenics SN - 0011-2275 ER - TY - GEN T1 - Matematiikan kirjallinen kielentäminen yliopiston matematiikan opetuksessa AU - Joutsenlahti, Jorma AU - Sarikka, Hanna AU - Kangas, Jussi AU - Harjulehto, Petteri N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29 PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-951-39-5390-4 T3 - The annual conference of Finnish Mathematics and Science Education Research Association, November 8-9, 2012, Jyväskylä, Finland SP - 59 EP - 70 BT - Matematiikan ja luonnontieteiden opetuksen tutkimusseuran konferenssijulkaisu 2012. Tutkimuksia / Jyväskylän yliopisto, opettajankoulutuslaitos A2 - Hähkiöniemi, Markus A2 - Leppäaho, Henry A2 - Nieminen, Pasi A2 - Viiri, Jouni PB - University of Jyväskylä CY - Jyväskylä ER - TY - JOUR T1 - Mean Value Properties for the Weinstein Equation Using the Hyperbolic Metric AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Tallennettu Online first

Contribution: organisation=mat,FACT1=1

Publisher name: Birkhäuser PY - 2013 Y1 - 2013 U2 - 10.1007/s11785-012-0280-4 DO - 10.1007/s11785-012-0280-4 M3 - Article VL - 7 SP - 1609 EP - 1621 JO - Complex Analysis and Operator Theory JF - Complex Analysis and Operator Theory SN - 1661-8254 IS - 5 ER - TY - GEN T1 - Networks of innovation relationships: multiscopic views on Finland AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Basole, Rahul C. AU - Salonen, Jaakko AU - Rubens, Neil N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: International Society for Professional Innovation Management ISPIM PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-952-265-420-5 T3 - International Society for Professional Innovation Management Conference SP - 1 EP - 15 BT - XXIV ISPIM Conference, Innovating in Global Markets: Challenges for Sustainable Growth, 16-19 June 2013, Helsinki, Finland A2 - Huizingh, K.R.E. A2 - Conn, S. A2 - Torkkeli, M. A2 - Schneider, S. A2 - Bitran, I. PB - International Society for Professional Innovation Management ISPIM CY - Manchester, UK ER - TY - GEN T1 - Normal Distributions Transform Occupancy Maps: Application to Large-Scale Online 3D Mapping AU - Saarinen, Jari AU - Andreasson, Henrik AU - Stoyanov, Todor AU - Ala-Luhtala, Juha AU - Lilienthal, Achim J. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: IEEE PY - 2013 Y1 - 2013 U2 - 10.1109/ICRA.2013.6630878 DO - 10.1109/ICRA.2013.6630878 M3 - Conference contribution SN - 978-1-4673-5641-1 T3 - IEEE International Conference on Robotics and Automation SP - 2233 EP - 2238 BT - 2013 IEEE International conference on Robotics and Automation, ICRA, May 6-10, 2013, Karlsruhe, Germany PB - IEEE CY - Piscataway, NJ ER - TY - GEN T1 - On Hodge-de Rham systems in hyperbolic Clifford analysis AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: American Institute of Physics AIP PY - 2013 Y1 - 2013 U2 - 10.1063/1.4825535 DO - 10.1063/1.4825535 M3 - Conference contribution SN - 978-0-7354-1184-5 T3 - AIP Conference Proceedings SP - 492 EP - 495 BT - 11th International Conference of Numerical Analysis and Applied Mathematics, ICNAAM 2013, 21-27 September 2013, Rhodes, Greece PB - American Institute of Physics AIP ER - TY - JOUR T1 - On hypermonogenic functions AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Taylor&Francis Online first: Forthcoming articles 14.9.2011.Poistettu Portfolio13:sta tuplat r=1850 ja r=1851.

Contribution: organisation=mat,FACT1=1 PY - 2013 Y1 - 2013 U2 - 10.1080/17476933.2011.613118 DO - 10.1080/17476933.2011.613118 M3 - Article VL - 58 SP - 975 EP - 990 JO - Complex Variables and Elliptic Equations JF - Complex Variables and Elliptic Equations SN - 1747-6933 IS - 7 ER - TY - GEN T1 - On the Structure of Robust Controllers for Infinite-Dimensional Systems AU - Hämäläinen, Timo AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: European Control Association EUCA PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-3-9524173-4-8 T3 - European Control Conference SP - 59 EP - 62 BT - 12th European Control Conference, ECC 2013, Zürich, Switzerland, 17.-19.7.2013 PB - European Control Association EUCA CY - Zürich, Sveitsi ER - TY - GEN T1 - Output Regulation Theory for Distributed Parameter Systems with Unbounded Control and Observation AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: IEEE PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-1-4673-5716-6 T3 - IEEE Conference on Decision and Control SP - 1083 EP - 1088 BT - 52nd IEEE Conference on Decision and Control, IEEE CDC 2013, December 10-13, 2013, Florence, Italy PB - IEEE CY - Piscataway, NJ ER - TY - GEN T1 - Particle filter and smoother for indoor localization AU - Nurminen, Henri AU - Ristimäki, Anssi AU - Ali-Löytty, Simo AU - Piche, Robert N1 - to appear in IEEEXPLORE

Contribution: organisation=ase,FACT1=0.75

Contribution: organisation=mat,FACT2=0.25

Portfolio EDEND: 2013-11-29

Publisher name: IEEE PY - 2013 Y1 - 2013 N2 - We present a real-time particle filter for 2D and 3D hybrid indoor positioning. It uses wireless local area network (WLAN) based position measurements, step and turn detection from a hand-held inertial sensor unit, floor plan restrictions, altitude change measurements from barometer and possibly other measurements such as occasional GNSS fixes. We also present a particle smoother, which uses future measurements to improve the position estimate for non-real-time applications. A lightweight fallback filter is run in the background for initialization, divergence monitoring and possibly re-initialization. In real-data tests the particle filter is more accurate and consistent than the methods that do not use floor plans. An example is shown on how smoothing helps to improve the filter estimate. Moreover, a floor change case is presented, in which the filter is capable of detecting the floor change and improving the 2D accuracy using the floor change information. AB - We present a real-time particle filter for 2D and 3D hybrid indoor positioning. It uses wireless local area network (WLAN) based position measurements, step and turn detection from a hand-held inertial sensor unit, floor plan restrictions, altitude change measurements from barometer and possibly other measurements such as occasional GNSS fixes. We also present a particle smoother, which uses future measurements to improve the position estimate for non-real-time applications. A lightweight fallback filter is run in the background for initialization, divergence monitoring and possibly re-initialization. In real-data tests the particle filter is more accurate and consistent than the methods that do not use floor plans. An example is shown on how smoothing helps to improve the filter estimate. Moreover, a floor change case is presented, in which the filter is capable of detecting the floor change and improving the 2D accuracy using the floor change information. U2 - http://dx.doi.org/10.1109/IPIN.2013.6817903 DO - http://dx.doi.org/10.1109/IPIN.2013.6817903 M3 - Conference contribution T3 - International Conference on Indoor Positioning and Indoor Navigation SP - 137 EP - 146 BT - International Conference on Indoor Positioning and Indoor Navigation, IPIN 2013, 28-31 Oct 2013, Montbéliard-Belfort, France PB - IEEE CY - Piscataway, NJ ER - TY - GEN T1 - Process for Measuring and Visualizing an Open Innovation Platform: Case Demola AU - Huhtamäki, Jukka AU - Luotonen, Ville AU - Kairamo, Ville AU - Still, Kaisa AU - Russell, Martha G. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: ACM PY - 2013 Y1 - 2013 N2 - Open innovation breaks the traditional pattern for developing new innovation leading to new business and the activities toward it. Consequently, new requirements are posed to innovation measurement. Demola is an open innovation platform that takes real-life problems from companies and other organizations and puts together and facilitates projects where students from different universities come together to solve the problems. This paper describes a set of network visualizations and animations that were developed in co-creation with the Demola operators to make visible the activity that Demola has initiated. Moreover, the development process used to design the visualizations and the technical process that was applied are described and discussed. We claim that static network visualizations and animations of an open innovation platform development are useful in presenting, describing, marketing and selling the platform for existing and new stakeholders. Our experience shows that in order to develop visualizations and animations that meet the requirements set by the different stakeholders, an iterative and incremental development process is needed. Moreover, we claim that taking a data-driven approach to visualization development is a key enabler in supporting the development. AB - Open innovation breaks the traditional pattern for developing new innovation leading to new business and the activities toward it. Consequently, new requirements are posed to innovation measurement. Demola is an open innovation platform that takes real-life problems from companies and other organizations and puts together and facilitates projects where students from different universities come together to solve the problems. This paper describes a set of network visualizations and animations that were developed in co-creation with the Demola operators to make visible the activity that Demola has initiated. Moreover, the development process used to design the visualizations and the technical process that was applied are described and discussed. We claim that static network visualizations and animations of an open innovation platform development are useful in presenting, describing, marketing and selling the platform for existing and new stakeholders. Our experience shows that in order to develop visualizations and animations that meet the requirements set by the different stakeholders, an iterative and incremental development process is needed. Moreover, we claim that taking a data-driven approach to visualization development is a key enabler in supporting the development. U2 - 10.1145/2523429.2523478 DO - 10.1145/2523429.2523478 M3 - Conference contribution SN - 978-1-4503-1992-8 T3 - MindTrek Conference SP - 166 EP - 171 BT - 17th International Academic MindTrek Conference, October 1-4, 2013, Tampere, Finland PB - ACM ER - TY - GEN T1 - Rapid Characterisation of Forest Structure from TLS and 3D Modelling AU - Burt, A. AU - Disney, M. AU - Raumonen, P. AU - Armston, J. AU - Calders, K. AU - Lewis, P. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: IEEE PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-1-4799-1113-4 T3 - IEEE International Geoscience and Remote Sensing Symposium SP - 1 EP - 4 BT - 2013 IEEE International Geoscience & Remote Sensing Symposium, IGARSS 2013, Melbourne, Australia, July 21-26, 2013 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Reduced order internal models in robust output regulation AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: IEEE PY - 2013 Y1 - 2013 N2 - In this paper we consider robust output regulation and the internal model principle for infinite-dimensional linear systems. We concentrate on a problem where the control law is required to be robust with respect to a restricted class of perturbations. We show that depending on the class of admissible perturbations, it is often possible to construct a robust controller with a smaller internal model than the one given by the internal model principle. In addition, we also look for minimal classes of perturbations that make the full internal model necessary. We introduce a straightforward way of testing for robustness of the control law for a given set of perturbations. The test in particular shows that the robustness is only dependent on the way the perturbations affect the transfer function of the plant at the frequencies of the exosystem. The theoretic results are applied to designing controllers for a one-dimensional wave equation and for a system consisting of three independent shock absorber models. AB - In this paper we consider robust output regulation and the internal model principle for infinite-dimensional linear systems. We concentrate on a problem where the control law is required to be robust with respect to a restricted class of perturbations. We show that depending on the class of admissible perturbations, it is often possible to construct a robust controller with a smaller internal model than the one given by the internal model principle. In addition, we also look for minimal classes of perturbations that make the full internal model necessary. We introduce a straightforward way of testing for robustness of the control law for a given set of perturbations. The test in particular shows that the robustness is only dependent on the way the perturbations affect the transfer function of the plant at the frequencies of the exosystem. The theoretic results are applied to designing controllers for a one-dimensional wave equation and for a system consisting of three independent shock absorber models. U2 - 10.1109/TAC.2013.2257596 DO - 10.1109/TAC.2013.2257596 M3 - Article VL - 58 SP - 2307 EP - 2318 JO - IEEE Transactions on Automatic Control JF - IEEE Transactions on Automatic Control SN - 0018-9286 IS - 9 ER - TY - JOUR T1 - Regional compensation for statistical maximum likelihood reconstruction error of PET image pixels AU - Forma, J. AU - Niemi, J.A. AU - Ruotsalainen, U. N1 - Contribution: organisation=sgn,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2013-07-29

Publisher name: IOP Publishing PY - 2013 Y1 - 2013 U2 - 10.1088/0031-9155/58/14/4849 DO - 10.1088/0031-9155/58/14/4849 M3 - Article VL - 58 SP - 4849 EP - 4864 JO - Physics in Medicine and Biology JF - Physics in Medicine and Biology SN - 0031-9155 IS - 14 ER - TY - GEN T1 - Relational Capital and Social Capital: One or two Fields of Research? AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Russell, Martha G. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Academic Conferences and Publishing International Limited PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-1-909507-77-7 T3 - International Conference on Intellectual Capital, Knowledge Management and Organisational Learning SP - 420 EP - 428 BT - Proceedings of the 10th International Conference on Intellectual Capital, Knowledge Management and Organisational Learning, ICICKM 2013, Washington, DC, USA, October 24-25, 2013 A2 - Green, Annie PB - Academic Conferences and Publishing International Limited CY - Reading, UK ER - TY - JOUR T1 - Robustness of polynomial stability with respect to unbounded perturbations AU - Paunonen, Lassi N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: Elsevier PY - 2013 Y1 - 2013 N2 - In this paper we present conditions for the preservation of strong and polynomial stability of a strongly continuous semigroup under unbounded finite rank perturbations of its infinitesimal generator. In addition, we also improve recent perturbation results for bounded finite rank perturbations. The results are illustrated with two examples. In the first one we consider the preservation of stability of a one-dimensional wave equation that has been stabilized polynomially with boundary feedback. In the second example we find conditions for the preservation of polynomial stability of a multiplication semigroup under unbounded rank one perturbations. AB - In this paper we present conditions for the preservation of strong and polynomial stability of a strongly continuous semigroup under unbounded finite rank perturbations of its infinitesimal generator. In addition, we also improve recent perturbation results for bounded finite rank perturbations. The results are illustrated with two examples. In the first one we consider the preservation of stability of a one-dimensional wave equation that has been stabilized polynomially with boundary feedback. In the second example we find conditions for the preservation of polynomial stability of a multiplication semigroup under unbounded rank one perturbations. U2 - 10.1016/j.sysconle.2013.01.005 DO - 10.1016/j.sysconle.2013.01.005 M3 - Article VL - 62 SP - 331 EP - 337 JO - Systems and Control Letters JF - Systems and Control Letters SN - 0167-6911 IS - 4 ER - TY - GEN T1 - Robustness properties of controllers with reduced order internal models AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Preprint: http://math.tut.fi/sysgroup/preprintc/PauPohECC13.pdf

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-07-29

Publisher name: European Control Association EUCA PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-3-952-41734-8 T3 - European Control Conference SP - 578 EP - 583 BT - 12th European Control Conference, ECC 2013, Zürich, Switzerland, 17.-19.7.2013 PB - European Control Association EUCA CY - Zürich, Switzerland ER - TY - JOUR T1 - Robust output regulation and the preservation of polynomial closed-loop stability AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Online first; Article first published online: 24 AUG 2013

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: John Wiley & Sons PY - 2013 Y1 - 2013 U2 - 10.1002/rnc.3064 DO - 10.1002/rnc.3064 M3 - Article SP - 1 EP - 28 JO - International Journal of Robust and Nonlinear Control JF - International Journal of Robust and Nonlinear Control SN - 1049-8923 ER - TY - JOUR T1 - SO-I: a surrogate model algorithm for expensive nonlinear integer programming problems including global optimization applications AU - Müller, Juliane AU - Shoemaker, Christine AU - Piche, Robert N1 - Online first

Contribution: organisation=ase,FACT1=1

Portfolio EDEND: 2013-10-29

Publisher name: Springer US PY - 2013 Y1 - 2013 U2 - 10.1007/s10898-013-0101-y DO - 10.1007/s10898-013-0101-y M3 - Article SP - 1 EP - 25 JO - Journal of Global Optimization JF - Journal of Global Optimization SN - 0925-5001 ER - TY - GEN T1 - Solvability of the output regulation problem with a feedforward controller AU - Laakkonen, Petteri AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: European Control Association EUCA PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-3-952-41734-8 T3 - European Control Conference SP - 560 EP - 565 BT - 12th European Control Conference, ECC 2013, Zürich, Switzerland, 17.-19.7.2013 PB - European Control Association EUCA CY - Zürich, Sveitsi ER - TY - JOUR T1 - SO-MI: A surrogate model algorithm for computationally expensive nonlinear mixed-integer black-box global optimization problems AU - Müller, Juliane AU - Shoemaker, C. AU - Piche, Robert N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Pergamon PY - 2013 Y1 - 2013 N2 - This paper introduces a surrogate model based algorithm for computationally expensive mixed-integer black-box global optimization problems with both binary and non-binary integer variables that may have computationally expensive constraints. The goal is to find accurate solutions with relatively few function evaluations. A radial basis function surrogate model (response surface) is used to select candidates for integer and continuous decision variable points at which the computationally expensive objective and constraint functions are to be evaluated. In every iteration multiple new points are selected based on different methods, and the function evaluations are done in parallel. The algorithm converges to the global optimum almost surely. The performance of this new algorithm, SO-MI, is compared to a branch and bound algorithm for nonlinear problems, a genetic algorithm, and the NOMAD (Nonsmooth Optimization by Mesh Adaptive Direct Search) algorithm for mixed-integer problems on 16 test problems from the literature (constrained, unconstrained, unimodal and multimodal problems), as well as on two application problems arising from structural optimization, and three application problems from optimal reliability design. The numerical experiments show that SO-MI reaches significantly better results than the other algorithms when the number of function evaluations is very restricted (200–300 evaluations). AB - This paper introduces a surrogate model based algorithm for computationally expensive mixed-integer black-box global optimization problems with both binary and non-binary integer variables that may have computationally expensive constraints. The goal is to find accurate solutions with relatively few function evaluations. A radial basis function surrogate model (response surface) is used to select candidates for integer and continuous decision variable points at which the computationally expensive objective and constraint functions are to be evaluated. In every iteration multiple new points are selected based on different methods, and the function evaluations are done in parallel. The algorithm converges to the global optimum almost surely. The performance of this new algorithm, SO-MI, is compared to a branch and bound algorithm for nonlinear problems, a genetic algorithm, and the NOMAD (Nonsmooth Optimization by Mesh Adaptive Direct Search) algorithm for mixed-integer problems on 16 test problems from the literature (constrained, unconstrained, unimodal and multimodal problems), as well as on two application problems arising from structural optimization, and three application problems from optimal reliability design. The numerical experiments show that SO-MI reaches significantly better results than the other algorithms when the number of function evaluations is very restricted (200–300 evaluations). U2 - 10.1016/j.cor.2012.08.022 DO - 10.1016/j.cor.2012.08.022 M3 - Article VL - 40 SP - 1383 EP - 1400 JO - Computers and Operations Research JF - Computers and Operations Research SN - 0305-0548 IS - 5 ER - TY - JOUR T1 - Statistical Path Loss Parameter Estimation and Positioning using RSS Measurements AU - Nurminen, Henri AU - Talvitie, Jukka AU - Ali-Löytty, Simo AU - Muller, Philipp AU - Lohan, Elena-Simona AU - Piche, Robert AU - Renfors, Markku N1 - Contribution: organisation=elt,FACT1=0.35

Contribution: organisation=ase,FACT2=0.5

Contribution: organisation=mat,FACT3=0.15

Portfolio EDEND: 2014-08-20

Publisher name: Scientific Research Publishing PY - 2013 Y1 - 2013 M3 - Article VL - 12 SP - 13 EP - 27 JO - Journal of Global Positioning Systems JF - Journal of Global Positioning Systems SN - 1446-3156 IS - 1 ER - TY - JOUR T1 - Stock Price Dynamics and Option Valuations under Volatility Feedback Effect AU - Kanniainen, Juho AU - Piche, Robert N1 - Tallennettu Online First 2012:na.Final version published online 22 Dec 2012

Contribution: organisation=tta,FACT1=0.8

Contribution: organisation=mat,FACT2=0.2

Publisher name: Elsevier PY - 2013 Y1 - 2013 N2 - According to the volatility feedback effect, an unexpected increase in squared volatility leads to an immediate decline in the price-dividend ratio. In this paper, we consider the properties of stock price dynamics and option valuations under the volatility feedback effect by modeling the joint dynamics of stock price, dividends, and volatility in continuous time. Most importantly, our model predicts the negative effect of an increase in squared return volatility on the value of deep-in-the-money call options and, furthermore, attempts to explain the volatility puzzle. We theoretically demonstrate a mechanism by which the market price of diffusion return risk, or an equity risk-premium, affects option prices and empirically illustrate how to identify that mechanism using forward-looking information on option contracts. Our theoretical and empirical results support the relevance of the volatility feedback effect. Overall, the results indicate that the prevailing practice of ignoring the time-varying dividend yield in option pricing can lead to oversimplification of the stock market dynamics. AB - According to the volatility feedback effect, an unexpected increase in squared volatility leads to an immediate decline in the price-dividend ratio. In this paper, we consider the properties of stock price dynamics and option valuations under the volatility feedback effect by modeling the joint dynamics of stock price, dividends, and volatility in continuous time. Most importantly, our model predicts the negative effect of an increase in squared return volatility on the value of deep-in-the-money call options and, furthermore, attempts to explain the volatility puzzle. We theoretically demonstrate a mechanism by which the market price of diffusion return risk, or an equity risk-premium, affects option prices and empirically illustrate how to identify that mechanism using forward-looking information on option contracts. Our theoretical and empirical results support the relevance of the volatility feedback effect. Overall, the results indicate that the prevailing practice of ignoring the time-varying dividend yield in option pricing can lead to oversimplification of the stock market dynamics. U2 - 10.1016/j.physa.2012.10.004 DO - 10.1016/j.physa.2012.10.004 M3 - Article VL - 392 SP - 722 EP - 740 JO - Physica A: Statistical Mechanics and Its Applications JF - Physica A: Statistical Mechanics and Its Applications SN - 0378-4371 IS - 4 ER - TY - JOUR T1 - Structure-Dynamics Relationships in Bursting Neuronal Networks Revealed Using a Prediction Framework AU - Mäki-Marttunen, Tuomo AU - Acimovic, Jugoslava AU - Linne, Marja-Leena AU - Ruohonen, Keijo N1 - Contribution: organisation=sgn,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Portfolio EDEND: 2013-12-29

Publisher name: Public Library of Science PY - 2013 Y1 - 2013 N2 - The question of how the structure of a neuronal network affects its functionality has gained a lot of attention in neuroscience. However, the vast majority of the studies on structure-dynamics relationships consider few types of network structures and assess limited numbers of structural measures. In this in silico study, we employ a wide diversity of network topologies and search among many possibilities the aspects of structure that have the greatest effect on the network excitability. The network activity is simulated using two point-neuron models, where the neurons are activated by noisy fluctuation of the membrane potential and their connections are described by chemical synapse models, and statistics on the number and quality of the emergent network bursts are collected for each network type. We apply a prediction framework to the obtained data in order to find out the most relevant aspects of network structure. In this framework, predictors that use different sets of graph-theoretic measures are trained to estimate the activity properties, such as burst count or burst length, of the networks. The performances of these predictors are compared with each other. We show that the best performance in prediction of activity properties for networks with sharp in-degree distribution is obtained when the prediction is based on clustering coefficient. By contrast, for networks with broad in-degree distribution, the maximum eigenvalue of the connectivity graph gives the most accurate prediction. The results shown for small (N~100) networks hold with few exceptions when different neuron models, different choices of neuron population and different average degrees are applied. We confirm our conclusions using larger (N~900) networks as well. Our findings reveal the relevance of different aspects of network structure from the viewpoint of network excitability, and our integrative method could serve as a general framework for structure-dynamics studies in biosciences. AB - The question of how the structure of a neuronal network affects its functionality has gained a lot of attention in neuroscience. However, the vast majority of the studies on structure-dynamics relationships consider few types of network structures and assess limited numbers of structural measures. In this in silico study, we employ a wide diversity of network topologies and search among many possibilities the aspects of structure that have the greatest effect on the network excitability. The network activity is simulated using two point-neuron models, where the neurons are activated by noisy fluctuation of the membrane potential and their connections are described by chemical synapse models, and statistics on the number and quality of the emergent network bursts are collected for each network type. We apply a prediction framework to the obtained data in order to find out the most relevant aspects of network structure. In this framework, predictors that use different sets of graph-theoretic measures are trained to estimate the activity properties, such as burst count or burst length, of the networks. The performances of these predictors are compared with each other. We show that the best performance in prediction of activity properties for networks with sharp in-degree distribution is obtained when the prediction is based on clustering coefficient. By contrast, for networks with broad in-degree distribution, the maximum eigenvalue of the connectivity graph gives the most accurate prediction. The results shown for small (N~100) networks hold with few exceptions when different neuron models, different choices of neuron population and different average degrees are applied. We confirm our conclusions using larger (N~900) networks as well. Our findings reveal the relevance of different aspects of network structure from the viewpoint of network excitability, and our integrative method could serve as a general framework for structure-dynamics studies in biosciences. U2 - 10.1371/journal.pone.0069373 DO - 10.1371/journal.pone.0069373 M3 - Article VL - 8 SP - 1 EP - 16 JO - PLoS ONE JF - PLoS ONE SN - 1932-6203 IS - 7 M1 - e69373 ER - TY - GEN T1 - The Asymptotic Behaviour of the Proportion of Hard Instances of the Halting Problem AU - Valmari, Antti N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: University of Szeged PY - 2013 Y1 - 2013 M3 - Conference contribution SN - 978-963-306-228-9 T3 - Symposium on Programming Languages and Software Tools SP - 170 EP - 184 BT - SPLST '13, 13th Symposium on Programming Languages and Software Tools, August 26-27, 2013, Szeged, Hungary A2 - Kiss, Akos PB - University of Szeged CY - Szeged, Hungary ER - TY - JOUR T1 - The Kraft Sum as a Monotone Function of the Refinement-Ordered Set of Uniquely Decipherable Codes AU - Foldes, Stephan N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-11-29

Publisher name: Institute of Mathematics. Brno University of Technology PY - 2013 Y1 - 2013 M3 - Article VL - 2 SP - 1 EP - 4 JO - Mathematics for Applications JF - Mathematics for Applications SN - 1805-3610 IS - 1 ER - TY - JOUR T1 - The Resolved Asteroid Program – Size, shape, and pole of (52) Europa AU - Merline, W.J. AU - Drummond, J.D. AU - Carry, B. AU - Conrad, A. AU - Tamblyn, P.M. AU - Dumas, C. AU - Kaasalainen, M. AU - Erikson, A. AU - Mottola, S. AU - Durech, J. AU - Rousseau, G. AU - Behrend, R. AU - Casalnuovo, G.B. AU - Chinaglia, B. AU - Christou, J.C. AU - Chapman, C.R. AU - Neyman, C. N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Academic Press PY - 2013 Y1 - 2013 U2 - 10.1016/j.icarus.2013.01.010 DO - 10.1016/j.icarus.2013.01.010 M3 - Article VL - 225 SP - 794 EP - 805 JO - Icarus JF - Icarus SN - 0019-1035 IS - 1 ER - TY - JOUR T1 - Tiedonlouhintaa tieliikenneonnettomuussatasta AU - Turunen, Esko N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2014-09-30

Publisher name: Liikennesuunnittelun Seura ry PY - 2013 Y1 - 2013 M3 - Article VL - 31 SP - 7 EP - 8 JO - Liikenne JF - Liikenne SN - 0359-9345 IS - 2 ER - TY - BOOK T1 - Twiiteryhmiä ja uutispäivittelyä - toimittajana sosiaalisessa mediassa AU - Vainikka, Eliisa AU - Noppari, Elina AU - Heinonen, Ari AU - Huhtamäki, Jukka N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29 PY - 2013 Y1 - 2013 M3 - Commissioned report SN - 978-951-44-9150-4 BT - Twiiteryhmiä ja uutispäivittelyä - toimittajana sosiaalisessa mediassa PB - Tampereen yliopisto. Viestinnän, median ja teatterin yksikkö. Journalismin, viestinnän ja median tutkimuskeskus, COMET ER - TY - JOUR T1 - Unimodality and log-concavity of f-vectors for cyclic and ordinary polytopes AU - Major, Laszlo N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29

Publisher name: Elsevier PY - 2013 Y1 - 2013 U2 - 10.1016/j.dam.2013.01.008 DO - 10.1016/j.dam.2013.01.008 M3 - Article VL - 161 SP - 1669 EP - 1672 JO - Discrete Applied Mathematics JF - Discrete Applied Mathematics SN - 0166-218X IS - 10-11 ER - TY - CHAP T1 - Verkostoanalyysi sosiaalisen median tutkimuksessa AU - Huhtamäki, Jukka AU - Parviainen, Olli N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29 PY - 2013 Y1 - 2013 M3 - Chapter SN - 978-951-768-410-1 SP - 245 EP - 273 BT - Otteita verkosta - verkon ja sosiaalisen median tutkimusmenetelmät A2 - Laaksonen, Salla-Maaria A2 - Matikainen, Janne A2 - Tikka, Minttu PB - Vastapaino CY - Tampere ER - TY - BOOK T1 - Virtuaalinen konelaboratorio ja semanttinen mallinnus konejärjestelmän suunnittelun tukena, Loppuraportti, Semogen II -hanke AU - Nykänen, Ossi AU - Koskinen, Kari T. AU - Ranta, Pekka AU - Salonen, Jaakko AU - Aaltonen, Jussi AU - Nurmi, Juha AU - Helminen, Matti AU - Alarotu, Vänni AU - Salomaa, Tuomas AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=0.6

Contribution: organisation=iha,FACT2=0.4

Portfolio EDEND: 2013-12-29 PY - 2013 Y1 - 2013 M3 - Commissioned report BT - Virtuaalinen konelaboratorio ja semanttinen mallinnus konejärjestelmän suunnittelun tukena, Loppuraportti, Semogen II -hanke PB - Tampereen teknillinen yliopisto, Smart Simulators -tutkimusryhmä CY - Tampere ER - TY - CHAP T1 - What’s out there? Asteroid models for target selection and mission planning AU - Kaasalainen, Mikko AU - Durech, Josef N1 - Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-12-29 PY - 2013 Y1 - 2013 U2 - 10.1007/978-3-642-39244-3 DO - 10.1007/978-3-642-39244-3 M3 - Chapter SN - 978-3-642-39243-6 SP - 131 EP - 150 BT - Asteroids: prospective energy and material resources A2 - Badescu, Viorel PB - Springer CY - Heidelberg ER - TY - CONF T1 - A review on old and new results on robust regulation of DPS with infinite-dimensional exosystems AU - Hämäläinen, Timo PY - 2012/1/4 Y1 - 2012/1/4 N2 - In this paper the robust regulation problem for infinite-dimensional systems\begin{equation*} \dot x = Ax + Bu + F_s v, \qquad y = Cx + Du + F_m v,\end{equation*}with infinite-dimensional exosystems $\dot v = S v$ is discussed. The feedback controller is of the form\begin{equation*} \dot z = \mathcal{G}_1 z + \mathcal{G}_2 e, \qquad u = K z.\end{equation*}All the spaces involved are infinite-dimensional. The purpose of the feedback controller is to stabilize the closed loop system and to asymptotically track the reference and perturbation signal generated by the exosystem.The first key idea is the existence of a dynamic (bounded) steady state operator, which gives the asymptotic state of the stabilized closed loop system as time goes to infinity. This operator satisfies an operator Sylvester equation. The controller $(\mathcal{G}_1, \mathcal{G}_2)$ is robustly regulating if the Sylvester equation decomposes so that a regulation constraint will be satisfied. In the presentation various definitions of Internal Model Principle, including an infinite-dimensional one, guaranteeing robust regulation, will be discussed. The second important step is in stabilizing the closed loop system by a proper choice of the controller. As the robust controller contains a $p$-copy of the exosystem, the closed loop system cannot be stabilized exponentially; instead strong or weak stabilization must be used. A necessary condition for the existence of bounded dynamic steady state operator is the nonexistence of system zeros on the spectrum of the exosystem. In the infinite-dimensional case, the behaviour of the system transfer function at infinity also plays an important role.The presentation reviews and combines the recent results of T. Hämäläinen, L. Paunonen. P. Laakkonen and S. Pohjolainen. AB - In this paper the robust regulation problem for infinite-dimensional systems\begin{equation*} \dot x = Ax + Bu + F_s v, \qquad y = Cx + Du + F_m v,\end{equation*}with infinite-dimensional exosystems $\dot v = S v$ is discussed. The feedback controller is of the form\begin{equation*} \dot z = \mathcal{G}_1 z + \mathcal{G}_2 e, \qquad u = K z.\end{equation*}All the spaces involved are infinite-dimensional. The purpose of the feedback controller is to stabilize the closed loop system and to asymptotically track the reference and perturbation signal generated by the exosystem.The first key idea is the existence of a dynamic (bounded) steady state operator, which gives the asymptotic state of the stabilized closed loop system as time goes to infinity. This operator satisfies an operator Sylvester equation. The controller $(\mathcal{G}_1, \mathcal{G}_2)$ is robustly regulating if the Sylvester equation decomposes so that a regulation constraint will be satisfied. In the presentation various definitions of Internal Model Principle, including an infinite-dimensional one, guaranteeing robust regulation, will be discussed. The second important step is in stabilizing the closed loop system by a proper choice of the controller. As the robust controller contains a $p$-copy of the exosystem, the closed loop system cannot be stabilized exponentially; instead strong or weak stabilization must be used. A necessary condition for the existence of bounded dynamic steady state operator is the nonexistence of system zeros on the spectrum of the exosystem. In the infinite-dimensional case, the behaviour of the system transfer function at infinity also plays an important role.The presentation reviews and combines the recent results of T. Hämäläinen, L. Paunonen. P. Laakkonen and S. Pohjolainen. M3 - Paper, poster or abstract ER - TY - JOUR T1 - A characterization of level-continuous fuzzy numbers AU - Kaleva, Osmo N1 - Published 16 December 2012

Contribution: organisation=mat,FACT1=1

Publisher name: Elsevier BV North-Holland PY - 2012 Y1 - 2012 U2 - 10.1016/j.fss.2012.07.002 DO - 10.1016/j.fss.2012.07.002 M3 - Article VL - 209 SP - 84 EP - 88 JO - Fuzzy Sets and Systems JF - Fuzzy Sets and Systems SN - 0165-0114 ER - TY - JOUR T1 - A Molecular Camera Gyroscope AU - Huttunen, Ville AU - Piche, Robert N1 - Ei UT-numeroa 14.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Tsentral'nyi Nauchno-Issledovatel'skii Institut Elektropribor PY - 2012 Y1 - 2012 M3 - Article VL - 77 SP - 69 EP - 81 JO - Giroskopiya I Navigatsiya JF - Giroskopiya I Navigatsiya SN - 0869-7035 ER - TY - JOUR T1 - A Monocular Camera Gyroscope AU - Huttunen, Ville AU - Piche, Robert N1 - Ei UT-numeroa 14.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC PY - 2012 Y1 - 2012 N2 - We present a method for tracking the 3-axis orientation of a monocular camera using orthogonal vanishing points detected in individual frames of a sequence of images. Robust and real-time vanishing point detection is done using a standard line segment detection method and an adaptive RANSAC algorithm. Vanishing points and corresponding vanishing directions found in consecutive frames are associated with each other to produce a sequence of orientation quaternions, which is processed by an extended Kalman filter. Experiments with a consumer-level, handheld mobile device indicate that the accuracy of the proposed method is comparable with those of consumer-grade inertial motion sensors. AB - We present a method for tracking the 3-axis orientation of a monocular camera using orthogonal vanishing points detected in individual frames of a sequence of images. Robust and real-time vanishing point detection is done using a standard line segment detection method and an adaptive RANSAC algorithm. Vanishing points and corresponding vanishing directions found in consecutive frames are associated with each other to produce a sequence of orientation quaternions, which is processed by an extended Kalman filter. Experiments with a consumer-level, handheld mobile device indicate that the accuracy of the proposed method is comparable with those of consumer-grade inertial motion sensors. U2 - 10.1134/S2075108712020046 DO - 10.1134/S2075108712020046 M3 - Article VL - 3 SP - 124 EP - 131 JO - Gyroscopy and Navigation JF - Gyroscopy and Navigation SN - 2075-1087 IS - 2 ER - TY - JOUR T1 - An Adaptive Derivative Free Method for Bayesian Posterior Approximation AU - Raitoharju, Matti AU - Ali-Löytty, Simo N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 N2 - In the Gaussian mixture approach a Bayesian posterior probability distribution function is approximated using a weighted sum of Gaussians. This work presents a novel method for generating a Gaussian mixture by splitting the prior taking the direction of maximum nonlinearity into account. The proposed method is computationally feasible and does not require analytical differentiation. Tests show that the method approximates the posterior better with fewer Gaussian components than existing methods. AB - In the Gaussian mixture approach a Bayesian posterior probability distribution function is approximated using a weighted sum of Gaussians. This work presents a novel method for generating a Gaussian mixture by splitting the prior taking the direction of maximum nonlinearity into account. The proposed method is computationally feasible and does not require analytical differentiation. Tests show that the method approximates the posterior better with fewer Gaussian components than existing methods. U2 - 10.1109/LSP.2011.2179800 DO - 10.1109/LSP.2011.2179800 M3 - Article VL - 19 SP - 87 EP - 90 JO - IEEE Signal Processing Letters JF - IEEE Signal Processing Letters SN - 1070-9908 IS - 2 M1 - 12436433 ER - TY - JOUR T1 - Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect AU - Durech, J. AU - Vokrouhlicky, D. AU - Baransky, A.R. AU - Breiter, S. AU - Burkhonov, O.A. AU - Cooney, W. AU - Fuller, V. AU - Gaftonyuk, N.M. AU - Gross, J. AU - Inasaridze, R.Ya. AU - Kaasalainen, Mikko AU - Krugly, Yu.N. AU - Kvaratshelia, O.I. AU - Litvinenko, E.A. AU - Macomber, B. AU - Marchis, F. AU - Molotov, I.E. AU - Oey, J. AU - Polishook, D. AU - Pollock, J. AU - Pravec, P. AU - Sarneczky, K. AU - Shevchenko, V.G. AU - Slyusarev, I. AU - Stephens, R. AU - Szabo, Gy. AU - Terrell, D. AU - Vachier, F. AU - Vanderplate, Z. AU - Viikinkoski, Matti AU - Warner, B.D. N1 - Contribution: organisation=mat,FACT1=1

Publisher name: EDP Sciences PY - 2012 Y1 - 2012 U2 - 10.1051/0004-6361/201219396 DO - 10.1051/0004-6361/201219396 M3 - Article VL - 547 SP - 9 JO - Astronomy and Astrophysics JF - Astronomy and Astrophysics SN - 0004-6361 M1 - A10 ER - TY - JOUR T1 - Analytics of the impact of user involvement in the innovation process and its outcomes. Case study: Media-Enhanced Learning (MEL) Service AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Isomursu, Minna AU - Lahti, Janne AU - Koskela-Huotari, Kaisa N1 - 4th World Conference on Educational Sciences, WCES 2012, 2-5 February 2012, Barcelona, Spain

Contribution: organisation=mat,FACT1=1

Publisher name: Elsevier PY - 2012 Y1 - 2012 U2 - 10.1016/j.sbspro.2012.05.370 DO - 10.1016/j.sbspro.2012.05.370 M3 - Article VL - 46 SP - 1740 EP - 1746 JO - Procedia: Social and Behavioral Sciences JF - Procedia: Social and Behavioral Sciences SN - 1877-0428 ER - TY - GEN T1 - An empirical solar radiation pressure model for autonomous GNSS orbit prediction AU - Ala-Luhtala, Juha AU - Seppänen, Mari AU - Piche, Robert N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 N2 - GNSS satellite orbits can be predicted by integrating the satellites’ equation of motion. If the prediction is done in a consumer grade positioning device, a simplified version of the equation of motion is required. The forces due to Earth’s gravitation, solar gravitation and lunar gravitation should be included, but the models for the smaller non-gravitational forces can be fairly simple. This paper presents a simple empirical two parameter solar radiation pressure model for an orbit prediction application in a navigation device that does not have a network connection. The model is tested by predicting the orbits of GPS and GLONASS satellites up to 5 days into the future, using position and improved velocity from broadcast ephemerides as an initial state. The predicted orbits are compared to the precise orbits from International GNSS Service (IGS). AB - GNSS satellite orbits can be predicted by integrating the satellites’ equation of motion. If the prediction is done in a consumer grade positioning device, a simplified version of the equation of motion is required. The forces due to Earth’s gravitation, solar gravitation and lunar gravitation should be included, but the models for the smaller non-gravitational forces can be fairly simple. This paper presents a simple empirical two parameter solar radiation pressure model for an orbit prediction application in a navigation device that does not have a network connection. The model is tested by predicting the orbits of GPS and GLONASS satellites up to 5 days into the future, using position and improved velocity from broadcast ephemerides as an initial state. The predicted orbits are compared to the precise orbits from International GNSS Service (IGS). U2 - 10.1109/PLANS.2012.6236929 DO - 10.1109/PLANS.2012.6236929 M3 - Conference contribution SN - 978-1-4673-0385-9 T3 - IEEE/ION Position Location and Navigation Symposium SP - 568 EP - 575 BT - 2012 IEEE/ION Position Location and Navigation Symposium PLANS, 23-26 April 2012, Myrtle Beach, SC, USA PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - GEN T1 - A New Characterization for n-Fold Positive Implicative BL-logics AU - Turunen, Esko AU - Tchikapa, Nganteu AU - Lele, Celestin N1 - ei ut-numeroa 21.9.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Springer PY - 2012 Y1 - 2012 U2 - 10.1007/978-3-642-31709-5_56 DO - 10.1007/978-3-642-31709-5_56 M3 - Conference contribution SN - 978-3-642-31708-8 T3 - International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems SP - 552 EP - 560 BT - Advances on Computational Intelligence 14th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, IPMU 2012, Catania, Italy, July 9-13, 2012. Proceedings, Part I. Communications in Computer and Information Science A2 - Greco, Salvatore A2 - Bouchon-Meunier, Bernadette A2 - Coletti, Giulianella A2 - Fedrizzi, Mario A2 - Matarazzo, Benedetto A2 - Yager, Ronald R. PB - Springer CY - Berlin Heidelberg ER - TY - GEN T1 - A New Method and Format for Describing CANopen System Topology AU - Helminen, Matti AU - Salonen, Jaakko AU - Saha, Heikki AU - Nykänen, Ossi AU - Koskinen, Kari T. AU - Ranta, Pekka AU - Pohjolainen, Seppo N1 - ei ut-numeroa 13.8.2013

Contribution: organisation=iha,FACT1=0.6

Contribution: organisation=mat,FACT2=0.4

Publisher name: CAN in Automation e.V. PY - 2012 Y1 - 2012 M3 - Conference contribution T3 - International CAN Conference SP - 1 EP - 8 BT - Proceedings of the 13th International CAN Conference, iCC 2012 in Hambach Castle, March 5 to March 6, Germany PB - CAN in Automation e.V. ER - TY - JOUR T1 - Asteroid (2867) Steins: Shape, topography and global physical properties from OSIRIS observations AU - Jorda, L. AU - Lamy, P. AU - Gaskell, R. AU - Kaasalainen, Mikko AU - Groussin, O. AU - Besse, S. AU - Faury, G. N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Academic Press PY - 2012 Y1 - 2012 U2 - 10.1016/j.icarus.2012.07.035 DO - 10.1016/j.icarus.2012.07.035 M3 - Article VL - 221 SP - 1089 EP - 1100 JO - Icarus JF - Icarus SN - 0019-1035 IS - 2 ER - TY - GEN T1 - A Stochastic Mixture Surrogate Model Algorithm for Computationally Expensive Black-Box Global Optimization Problems AU - Müller, Juliane AU - Shoemaker, Christine AU - Piche, Robert N1 - ei ut-numeroa 22.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Universidade Federal do Rio Grande do Norte PY - 2012 Y1 - 2012 M3 - Conference contribution T3 - Global Optimization Workshop SP - 1 EP - 4 BT - Proceedings of Global Optimization Workshop 2012, 26-29 June 2012, Natal, Brazil PB - Universidade Federal do Rio Grande do Norte CY - Natal, Brazil ER - TY - JOUR T1 - Asymptotic modeling of unconstrained control of a tethered power kite moving along a given closed-loop spherical trajectory AU - Silvennoinen, Risto AU - Argatov, Ivan N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Springer Netherlands PY - 2012 Y1 - 2012 U2 - 10.1007/s10665-011-9475-3 DO - 10.1007/s10665-011-9475-3 M3 - Article VL - 72 SP - 187 EP - 203 JO - Journal of Engineering Mathematics JF - Journal of Engineering Mathematics SN - 0022-0833 IS - 1 ER - TY - JOUR T1 - Autonomous Prediction of GPS and GLONASS Satellite Orbits AU - Seppänen, Mari AU - Ala-Luhtala, Juha AU - Piche, Robert AU - Martikainen, Simo AU - Ali-Löytty, Simo N1 - ei ut-numeroa 29.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Navigation PY - 2012 Y1 - 2012 U2 - 10.1002/navi.10 DO - 10.1002/navi.10 M3 - Article VL - 59 SP - 119 EP - 134 JO - Navigation JF - Navigation SN - 0028-1522 IS - 2 ER - TY - GEN T1 - Characterizing n-Fold Positive Implicative BL-logics AU - Turunen, Esko AU - Lele, Celestin AU - Tchikapa, Ngentau N1 - ei ut-numeroa 21.9.2013

Contribution: organisation=mat,FACT1=1 PY - 2012 Y1 - 2012 M3 - Conference contribution T3 - ManyVal SP - 60 EP - 64 BT - ManyVal'12 In Honour of Antonio Di Nola's 65th Birthday, Salerno, Italy, 4.7.7.2012 ER - TY - GEN T1 - Comprehensive Quantitative Tree Models from TLS Data AU - Åkerblom, Markku AU - Raumonen, Pasi AU - Kaasalainen, Mikko AU - Kaasalainen, Sanna AU - Kaartinen, Harri N1 - Poistettu tupla r=3140

Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 U2 - 10.1109/IGARSS.2012.6352751 DO - 10.1109/IGARSS.2012.6352751 M3 - Conference contribution SN - 978-1-4673-1160-1 T3 - IEEE International Geoscience and Remote Sensing Symposium SP - 6507 EP - 6510 BT - IEEE International Geoscience and Remote Sensing Symposium, IGARSS, 2012, 22.-27.7.2012, Munich, Germany PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - GEN T1 - Dual Look at Robust Regulation: Frequency Domain and State Space Approaches AU - Laakkonen, Petteri AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 U2 - 10.1109/MMAR.2012.6347929 DO - 10.1109/MMAR.2012.6347929 M3 - Conference contribution SN - 978-1-4673-2121-1 T3 - International Conference on Methods and Models in Automation & Robotics SP - 136 EP - 141 BT - Proceedings of MMAR 2012. 17th International Conference on Methods and Models in Automation & Robotics, MMAR 2012, 27-30 August 2012, Miedzyzdroje, Poland PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - BOOK T1 - Elementary Partial Differential Equations. Theory and Solved Problems. AU - Piche, Robert N1 - ei ut-numeroa 28.8.2013

Contribution: organisation=mat,FACT1=1 PY - 2012 Y1 - 2012 M3 - Book SN - 978-3-659-23987-8 BT - Elementary Partial Differential Equations. Theory and Solved Problems. PB - Lambert Academic Publishing CY - Saarbrücken, Germany ER - TY - BOOK T1 - Estimation of Linear Systems with Abrupt Changes of the Noise Covariances Using Variational Bayes Algorithm AU - Pesonen, Henri AU - Piche, Robert N1 - Julkaistu DPubissa vuonna 2012.Tallennettu Portfolioon 2013.

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-04-29 PY - 2012 Y1 - 2012 N2 - The variational Bayes method is applied to the state-space estimation problem with maneuvers or changes in the covariance of the observation noise. The resulting algorithm is an off-line batch method that can be used to provide a baseline performance estimation results for the recursive methods. In addition to batch methods we introduce a heuristic approach to make the algorithm on-line. Through simulations we show how the introduced method achieves the best accuracy out of all compared approximative estimation methods. AB - The variational Bayes method is applied to the state-space estimation problem with maneuvers or changes in the covariance of the observation noise. The resulting algorithm is an off-line batch method that can be used to provide a baseline performance estimation results for the recursive methods. In addition to batch methods we introduce a heuristic approach to make the algorithm on-line. Through simulations we show how the introduced method achieves the best accuracy out of all compared approximative estimation methods. M3 - Commissioned report T3 - Tampereen teknillinen yliopisto. Matematiikan laitos. Tutkimusraportti BT - Estimation of Linear Systems with Abrupt Changes of the Noise Covariances Using Variational Bayes Algorithm PB - Tampere University of Technology, Department of Mathematics CY - Tampere ER - TY - GEN T1 - Facilitating active participation in web-based co-development AU - Friedrich, Pirjo AU - Huhtamäki, Jukka AU - Koskela-Huotari, Kaisa AU - Karppinen, Kaarina AU - Still, Kaisa N1 - ei ut-numeroa 12.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Akademika forlag PY - 2012 Y1 - 2012 M3 - Conference contribution SN - 978-82-321-0088-0 T3 - Innovation Through Social Media SP - 16 EP - 23 BT - Proceedings of Innovation through Social Media, ISM 2012 workshop proceedings, December 3, 2012, Oslo, Norway PB - AKADEMIKA FORLAG CY - Trondheim, Norway ER - TY - GEN T1 - Feedforward Output Regulation for Distributed Parameter Systems with Infinite-Dimensional Exosystems AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - ei ut-numeroa 27.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: IEEE PY - 2012 Y1 - 2012 U2 - 10.1109/CDC.2012.6426567 DO - 10.1109/CDC.2012.6426567 M3 - Conference contribution SN - 978-1-4673-2065-8 T3 - IEEE Conference on Decision and Control SP - 1566 EP - 1571 BT - Proceedings of the 51st IEEE Conference on Decision and Control, IEEE CDC 2012, December 10-13 2012, Maui, Hawaii, USA PB - IEEE CY - Piscataway, NJ ER - TY - GEN T1 - Gaussian mixture filter allowing negative weights and its application to positioning using signal strength measurements AU - Muller, Philipp AU - Ali-Löytty, Simo AU - Dashti, Marzieh AU - Nurminen, Henri AU - Piche, Robert N1 - ei ut-numeroa 22.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 N2 - This paper proposes a novel Gaussian Mixture Filter (GMF) that allows components with negative weights. In case of a ring-shaped likelihood function, the new filter keeps the number of components low by approximating the likelihood as a Gaussian mixture (GM) of two components, one with positive and the other with negative weight. In this article, the filter is applied to positioning with received signal strength (RSS) based range measurements. The filter is tested using simulated measurements, and the tests indicate that the new GMF outperforms the Extended Kalman Filter (EKF) in both accuracy and consistency. AB - This paper proposes a novel Gaussian Mixture Filter (GMF) that allows components with negative weights. In case of a ring-shaped likelihood function, the new filter keeps the number of components low by approximating the likelihood as a Gaussian mixture (GM) of two components, one with positive and the other with negative weight. In this article, the filter is applied to positioning with received signal strength (RSS) based range measurements. The filter is tested using simulated measurements, and the tests indicate that the new GMF outperforms the Extended Kalman Filter (EKF) in both accuracy and consistency. U2 - 10.1109/WPNC.2012.6268741 DO - 10.1109/WPNC.2012.6268741 M3 - Conference contribution SN - 978-1-4673-1437-4 T3 - Workshop on Positioning, Navigation and Communication SP - 71 EP - 76 BT - Proceedings of WPNC 2012, 9th Workshop on Positioning, Navigation and Communication, March 15-16, 2012, Dresden, Germany PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Harmonic Forms on Conformal Euclidean Manifolds: The Clifford Multivector Approach AU - Orelma, Heikki N1 - Online first, Springer

Contribution: organisation=mat,FACT1=1 PY - 2012 Y1 - 2012 U2 - 10.1007/s00006-011-0297-1 DO - 10.1007/s00006-011-0297-1 M3 - Article VL - 22 SP - 143 EP - 158 JO - Advances in Applied Clifford Algebras JF - Advances in Applied Clifford Algebras SN - 0188-7009 IS - 1 ER - TY - JOUR T1 - Hierarchical Bayesian inference for the EEG inverse problem using realistic FE head models: Depth localization and source separation for focal primary currents AU - Lucka, Felix AU - Pursiainen, Sampsa AU - Burger, Martin AU - Wolters, Carsten H. N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Elsevier PY - 2012 Y1 - 2012 U2 - 10.1016/j.neuroimage.2012.04.017 DO - 10.1016/j.neuroimage.2012.04.017 M3 - Article VL - 61 SP - 1364 EP - 1382 JO - NeuroImage JF - NeuroImage SN - 1053-8119 IS - 4 ER - TY - GEN T1 - Hyperbolic laplace operator and the Weinstein equation in R3 AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - ei ut-numeroa 12.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: IKM PY - 2012 Y1 - 2012 M3 - Conference contribution T3 - International conference on the applications of computer science and mathematics in architecture and civil engineering SP - 15 BT - Proceedings in the 19th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering, IKM 2012, July 4-6 2012, Weimar, Germany A2 - Gürlebeck, K. A2 - Lahmer, T. A2 - Werner, F. PB - IKM CY - Weimar, Germany ER - TY - GEN T1 - Mathematics Remedial Instruction with Math-Bridge e-learning system AU - Kangas, Jussi AU - Miilumäki, Thumas AU - Pohjolainen, Seppo N1 - Poistetty tupla r=3459. ei ut-numeroa 19.8.2013

Contribution: organisation=mat hyplab,FACT1=1

Publisher name: Universidad de Salamanca PY - 2012 Y1 - 2012 M3 - Conference contribution SN - 978-84-695-3960-6 T3 - SEFI MWG Seminar BT - 16th SEFI MWG Seminar - Mathematical Education of Engineers, Salamanca, Spain, 28.-30.6.2012 A2 - Alpers, Burkhard A2 - Robinson, Carol A2 - Rodriguez, Gerardo A2 - Martin, Angel A2 - de la Villa, Agustin PB - Universidad de Salamanca CY - Salamanca, Spain ER - TY - PAT T1 - Method of tracking a state of a mobile electronic device AU - Sirola, Niilo AU - Ali-Löytty, Simo N1 - US008213956B2 : US 8,213,956 B2 : (45) Jul. 3, 2012 : (87) PCT/EP2006/002272 : (87) WO2007/101453 : (21) 12/224,767 : OKM 2012 tilasto : tuloss. tilasto 2013.

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-02-27 PY - 2012 Y1 - 2012 M3 - Patent M1 - Pat. US 8213956 B2 ER - TY - JOUR T1 - Mobile Tracking in Mixed Line-of-Sight/Non-Line-of-Sight Conditions: Algorithm and Theoretical Lower Bound AU - Chen, Liang AU - Ali-Löytty, Simo AU - Piche, Robert AU - Wu, Lenan N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Springer PY - 2012 Y1 - 2012 N2 - The paper investigates the problem of mobile tracking in mixed line-of-sight (LOS)/non-line-of-sight (NLOS) conditions. The motion of mobile station is modeled by a dynamic white noise acceleration model, while the measurements are time of arrival (TOA). A first-order Markov model is employed to describe the dynamic transition of LOS/NLOS conditions. An improved Rao-Blackwellized particle filter (RBPF) is proposed, in which the LOS/NLOS sight conditions are estimated by particle filtering using the optimal trial distribution, and the mobile state is computed by applying approximated analytical methods. The theoretical error lower bound is further studied in the described problem. A new method is presented to compute the posterior Cramer-Rao lower bound (CRLB): the mobile state is first estimated by decentralized extended Kalman filter (EKF) method, then sigma point set and unscented transformation are applied to calculate Fisher information matrix (FIM). Simulation results show that the improved RBPF is more accurate than current methods, and its performance approaches to the theoretical bound. AB - The paper investigates the problem of mobile tracking in mixed line-of-sight (LOS)/non-line-of-sight (NLOS) conditions. The motion of mobile station is modeled by a dynamic white noise acceleration model, while the measurements are time of arrival (TOA). A first-order Markov model is employed to describe the dynamic transition of LOS/NLOS conditions. An improved Rao-Blackwellized particle filter (RBPF) is proposed, in which the LOS/NLOS sight conditions are estimated by particle filtering using the optimal trial distribution, and the mobile state is computed by applying approximated analytical methods. The theoretical error lower bound is further studied in the described problem. A new method is presented to compute the posterior Cramer-Rao lower bound (CRLB): the mobile state is first estimated by decentralized extended Kalman filter (EKF) method, then sigma point set and unscented transformation are applied to calculate Fisher information matrix (FIM). Simulation results show that the improved RBPF is more accurate than current methods, and its performance approaches to the theoretical bound. U2 - 10.1007/s11277-011-0294-7 DO - 10.1007/s11277-011-0294-7 M3 - Article VL - 65 SP - 753 EP - 771 JO - WIRELESS PERSONAL COMMUNICATIONS JF - WIRELESS PERSONAL COMMUNICATIONS SN - 0929-6212 IS - 4 ER - TY - GEN T1 - Networks of Growth: Case Young Innovative Companies in Finland AU - Huhtamäki, Jukka AU - Still, Kaisa AU - Isomursu, Minna AU - Russell, Martha G. AU - Rubens, Neil N1 - ei ut-numeroa 13.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Academic Publishing International Limited PY - 2012 Y1 - 2012 M3 - Conference contribution SN - 978-1-908272-68-3 T3 - European Conference on Innovation and Entrepreneurship BT - Proceedings of the 7th European Conference on Innovation and Entrepreneurship, September 20-21, 2012, Santarem, Portugal A2 - Vivas, C. A2 - Lucas, F. PB - Academic Publishing International Limited CY - Reading, UK ER - TY - JOUR T1 - n-Fold implicative basic logic is Gödel logic AU - Turunen, Esko AU - Tchikapa, Nganteu AU - Lele, Celestin N1 - Online first

Contribution: organisation=mat,FACT1=1

Publisher name: Springer PY - 2012 Y1 - 2012 U2 - 10.1007/s00500-011-0761-9 DO - 10.1007/s00500-011-0761-9 M3 - Article VL - 16 SP - 177 EP - 181 JO - Soft Computing JF - Soft Computing SN - 1432-7643 IS - 1 ER - TY - JOUR T1 - Nonlinear iteration semigroups of fuzzy Cauchy problems AU - Kaleva, Osmo N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Elsevier BV North-Holland PY - 2012 Y1 - 2012 U2 - 10.1016/j.fss.2012.04.016 DO - 10.1016/j.fss.2012.04.016 M3 - Article VL - 209 SP - 104 EP - 110 JO - Fuzzy Sets and Systems JF - Fuzzy Sets and Systems SN - 0165-0114 ER - TY - BOOK T1 - On the Parametric Instability Caused by Step Size Variation in Runge-Kutta-Nyström Methods AU - Piche, Robert N1 - Kopio tietueesta r=15203.Ei tilastoida

Contribution: organisation=mat,FACT1=1 PY - 2012 Y1 - 2012 M3 - Commissioned report T3 - arXiv BT - On the Parametric Instability Caused by Step Size Variation in Runge-Kutta-Nyström Methods PB - Unknown Publisher ER - TY - JOUR T1 - Optimal computation of brightness integrals parametrized on the unit sphere AU - Kaasalainen, Mikko AU - Lu, X. AU - Vänttinen, A.-V. N1 - Contribution: organisation=mat,FACT1=1

Publisher name: EDP Sciences PY - 2012 Y1 - 2012 U2 - 10.1051/0004-6361/201117982 DO - 10.1051/0004-6361/201117982 M3 - Article VL - 539 SP - 7 JO - Astronomy and Astrophysics JF - Astronomy and Astrophysics SN - 0004-6361 M1 - A96 ER - TY - GEN T1 - Outlier-robust estimation of GPS satellite clock offsets AU - Martikainen, Simo AU - Piche, Robert AU - Ali-Löytty, Simo N1 - Artikkelissa ISBN-numero 978-1-4673-2343-7. ei ut-numeroa 22.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 N2 - A new method to predict a GPS satellite’s clock offset is presented. The motivation for this work is to improve the time to first fix and make the clock offset prediction less sensitive to outliers. The proposed method is tested with real data and it is shown to improve prediction accuracy compared to other known methods. AB - A new method to predict a GPS satellite’s clock offset is presented. The motivation for this work is to improve the time to first fix and make the clock offset prediction less sensitive to outliers. The proposed method is tested with real data and it is shown to improve prediction accuracy compared to other known methods. U2 - 10.1109/ICL-GNSS.2012.6253107 DO - 10.1109/ICL-GNSS.2012.6253107 M3 - Conference contribution SN - 978-1-4673-2344-4 T3 - 2012 International Conference on Localization and GNSS SP - 5 pp. BT - 2012 International Conference on Localization and GNSS ICL-GNSS, June 25-27, 2012, Starnberg, Germany PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - GEN T1 - Output Regulation for General Infinite-Dimensional Exosystems AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - ei ut-numeroa 27.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: International Federation of Automatic Control IFAC PY - 2012 Y1 - 2012 U2 - 10.3182/20120620-3-DK-2025.00113 DO - 10.3182/20120620-3-DK-2025.00113 M3 - Conference contribution SN - 978-3-902823-03-8 T3 - IFAC Symposium on Robust Control Design SP - 162 EP - 167 BT - Proceedings of the 7th IFAC Symposium on Robust Control Design, Rocond 2012, 20-22 June 2012, Aalborg, Denmark PB - International Federation of Automatic Control IFAC CY - Laxenburg, Austria ER - TY - GEN T1 - Paradigm shift in innovation indicators - from analog to digital AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Rubens, Neil N1 - ei ut-numeroa 30.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: International Society for Professional Innovation Management ISPIM PY - 2012 Y1 - 2012 M3 - Conference contribution SN - 978-952-265-317-8 T3 - ISPIM Innovation Symposium BT - Proceedings of the 5th ISPIM Innovation Forum, 9-12 December, 2012, Seoul, Korea PB - International Society for Professional Innovation Management ISPIM CY - Manchester, UK ER - TY - JOUR T1 - Periodic Output Regulation for Distributed Parameter Systems AU - Paunonen, Lassi AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Springer UK PY - 2012 Y1 - 2012 N2 - In this paper the output regulation of a linear distributed parameter system with a nonautonomous periodic exosystem is considered. It is shown that the solvability of the output regulation problem can be characterized by the solvability of a certain constrained infinite-dimensional Sylvester differential equation. Conditions are given for the existence of feedforward and feedback controllers solving the regulation problem along with a method for their construction. The theoretical results are applied to output regulation of a controlled delay equation. AB - In this paper the output regulation of a linear distributed parameter system with a nonautonomous periodic exosystem is considered. It is shown that the solvability of the output regulation problem can be characterized by the solvability of a certain constrained infinite-dimensional Sylvester differential equation. Conditions are given for the existence of feedforward and feedback controllers solving the regulation problem along with a method for their construction. The theoretical results are applied to output regulation of a controlled delay equation. U2 - 10.1007/s00498-012-0087-x DO - 10.1007/s00498-012-0087-x M3 - Article VL - 24 SP - 403 EP - 441 JO - Mathematics of Control Signals and Systems JF - Mathematics of Control Signals and Systems SN - 0932-4194 IS - 4 ER - TY - GEN T1 - Prime filters on residuated lattices AU - Kondo, Michiro AU - Turunen, Esko N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 U2 - 10.1109/ISMVL.2012.40 DO - 10.1109/ISMVL.2012.40 M3 - Conference contribution SN - 978-0-7695-4673-5 T3 - IEEE International Symposium on Multiple-Valued Logic SP - 89 EP - 91 BT - 2012 IEEE 42nd International Symposium on Multiple-Valued Logic ISMVL, 14-16 May, 2012, Victoria, British Columbia, Canada PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Raviart-Thomas-type sources adapted to applied EEG and MEG: Implementation and results AU - Pursiainen, Sampsa N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Physics Publishing PY - 2012 Y1 - 2012 U2 - 10.1088/0266-5611/28/6/065013 DO - 10.1088/0266-5611/28/6/065013 M3 - Article VL - 28 JO - Inverse Problems JF - Inverse Problems SN - 0266-5611 IS - 6 M1 - 065013 ER - TY - GEN T1 - Robust Kalman filter for positioning with wireless BS coverage areas AU - Dashti, Marzieh AU - Ali-Löytty, Simo AU - Wirola, Laura AU - Muller, Philipp AU - Nurminen, Henri AU - Piche, Robert N1 - ei ut-numeroa 12.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 N2 - A robust Kalman filter method for positioning using a database of wireless base station coverage areas is presented. In tests with simulated and real data, the proposed filter is found to be more accurate than static positioning or conventional Kalman filtering. AB - A robust Kalman filter method for positioning using a database of wireless base station coverage areas is presented. In tests with simulated and real data, the proposed filter is found to be more accurate than static positioning or conventional Kalman filtering. U2 - 10.1109/WPNC.2012.6268743 DO - 10.1109/WPNC.2012.6268743 M3 - Conference contribution SN - 978-1-4673-1439-8 T3 - Workshop on Positioning, Navigation and Communication SP - 83 EP - 88 BT - Proceedings of WPNC 2012, 9th Workshop on Positioning, Navigation and Communication, March 15-16, 2012, Dresden, Germany PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Robustness of strongly and polynomially stable semigroups AU - Paunonen, Lassi N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Academic Press PY - 2012 Y1 - 2012 N2 - In this paper we study the robustness properties of strong and polynomial stability of semigroups of operators. We show that polynomial stability of a semigroup is robust with respect to a large and easily identifiable class of perturbations to its infinitesimal generator. The presented results apply to general polynomially stable semigroups and bounded perturbations. The conditions on the perturbations generalize well-known criteria for the preservation of exponential stablity of semigroups. We also show that the general results can be improved if the perturbation is of finite rank or if the semigroup is generated by a Riesz-spectral operator. The theory is applied to deriving concrete conditions for the preservation of stability of a strongly stabilized one-dimensional wave equation. AB - In this paper we study the robustness properties of strong and polynomial stability of semigroups of operators. We show that polynomial stability of a semigroup is robust with respect to a large and easily identifiable class of perturbations to its infinitesimal generator. The presented results apply to general polynomially stable semigroups and bounded perturbations. The conditions on the perturbations generalize well-known criteria for the preservation of exponential stablity of semigroups. We also show that the general results can be improved if the perturbation is of finite rank or if the semigroup is generated by a Riesz-spectral operator. The theory is applied to deriving concrete conditions for the preservation of stability of a strongly stabilized one-dimensional wave equation. U2 - 10.1016/j.jfa.2012.08.023 DO - 10.1016/j.jfa.2012.08.023 M3 - Article VL - 263 SP - 2555 EP - 2583 JO - Journal of Functional Analysis JF - Journal of Functional Analysis SN - 0022-1236 IS - 9 ER - TY - GEN T1 - Robust regulation: From state-space to frequency domain AU - Laakkonen, Petteri N1 - ei ut-numeroa 20.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Tampere Graduate School in Information Science and Engineering (TISE). Tampere University of Technology, University of Tampere PY - 2012 Y1 - 2012 M3 - Conference contribution SN - 978-952-15-2845-3 T3 - TISE Seminar SP - 135 EP - 140 BT - Digest of TISE Seminar 2012, Nokia, Finland, 14 June, 2012. TISE Publications A2 - Niemistö, Antti PB - Tampere Graduate School in Information Science and Engineering (TISE). Tampere University of Technology, University of Tampere CY - Tampere ER - TY - GEN T1 - Robust Regulation of Distributed Parameter Systems with Infinite-Dimensional Exosystems AU - Hämäläinen, Timo AU - Pohjolainen, Seppo N1 - ei ut-numeroa 13.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 U2 - 10.1109/CDC.2012.6426076 DO - 10.1109/CDC.2012.6426076 M3 - Conference contribution SN - 978-1-4673-2064-1 T3 - IEEE Conference on Decision and Control SP - 3514 EP - 3519 BT - The 51st IEEE Conference on Decision and Control, IEEE CDC 2012, December 10-13 2012, Maui, Hawaii, USA PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Shape modeling technique KOALA validated by ESA Rosetta at (21) Lutetia AU - Carry, B. AU - Kaasalainen, Mikko AU - Merline, W.J. AU - Muller, T.G. AU - Jorda, L. AU - Drummond, J.D. AU - Berthier, J. AU - O'Rourke, L. AU - Durech, J. AU - Küppers, M. AU - Conrad, A. AU - Tamblyn, P. AU - Dumas, C. AU - Sierks, H. N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Pergamon PY - 2012 Y1 - 2012 U2 - 10.1016/j.pss.2011.12.018 DO - 10.1016/j.pss.2011.12.018 M3 - Article VL - 66 SP - 200 EP - 212 JO - Planetary and Space Science JF - Planetary and Space Science SN - 0032-0633 IS - 1 ER - TY - JOUR T1 - Shape reconstruction of irregular bodies with multiple complementary data sources AU - Kaasalainen, Mikko AU - Viikinkoski, Matti N1 - Contribution: organisation=mat,FACT1=1

Publisher name: EDP Sciences PY - 2012 Y1 - 2012 U2 - 10.1051/0004-6361/201219267 DO - 10.1051/0004-6361/201219267 M3 - Article VL - 543 SP - 9 JO - Astronomy and Astrophysics JF - Astronomy and Astrophysics SN - 0004-6361 M1 - A97 ER - TY - BOOK T1 - Sosiaalisesta mediasta dataa innovaatiotoiminnan ymmärtämiseen ja mittaamiseen AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Koskela-Huotari, Kaisa AU - Isomursu, Minna AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1 PY - 2012 Y1 - 2012 M3 - Commissioned report T3 - Tekes Policy Brief BT - Sosiaalisesta mediasta dataa innovaatiotoiminnan ymmärtämiseen ja mittaamiseen PB - Tekes ER - TY - JOUR T1 - Stress-strain behavior of polyamide 6 staple fibers of punch-needled press felts under simulated wet-pressing conditions AU - Hakala, Tomi AU - Kaleva, Osmo AU - Harlin, Ali N1 - Contribution: organisation=mol,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5

Publisher name: Routledge PY - 2012 Y1 - 2012 U2 - 10.1080/00405000.2012.677566 DO - 10.1080/00405000.2012.677566 M3 - Article VL - 103 SP - 1280 EP - 1293 JO - Journal of the Textile Institute JF - Journal of the Textile Institute SN - 0040-5000 IS - 12 ER - TY - BOOK T1 - Suomessa 2004-2008 sattuneiden tieliikenneonnettomuuksien analysointia GUHA-tiedonlouhintamenetelmällä AU - Järvenpää, Marko AU - Turunen, Esko N1 - Tallennettu DPubiin jo vuonna 2012.Portfolioon tiedot 2013.

Contribution: organisation=mat,FACT1=1

Portfolio EDEND: 2013-04-29 PY - 2012 Y1 - 2012 N2 - Tässä tutkimuksessa analysoidaan Suomessa vuosina 2004-2008 poliisin rekisteröimää 83509 tieliikenneonnettomuutta, joissa loukkaantumisiin johti enemmän kuin joka viides ja kuolemaan 1203 onnettomuutta; näissä enemmän kuin yksi ihmishenki menettiin 90 tapauksessa. Vaikka tieliikennekuolemat ovat lukumääräisesti olleet viime vuosina laskussa, on yksikin kuollut tai loukkaantunut liikaa. Kaikki mikä voidaan tehdä onnettomuuksien vähentämiseksi, on tehtävä. Analysoimalla onnettomuusdataa voidaan mahdollisesti löytää sellaisia syitä ja riippuvuuksia, jotka eivät ole olleet liikennesuunnittelijoiden, lainsäätäjien ja muiden asiantuntijoiden tiedossa ja joihin ei sen vuoksi ole osattu tarttua.Tutkimus on osa Tampereen teknillisen yliopiston matematiikan laitoksen sovelletun logiikan tutkimusryhmän toimintaa. Käyttämämme tutkimusmetodi on GUHA-tiedonlouhintamenetelmä, jonka soveltuvuutta tieliikenneonnettomuusdatan analysoimiseen tässä tutkimusprojektissa selvitetään. Sovelletun logiikan tutkimusryhmällä ei ole erityistä tieliikenneproblematiikan asiantuntemusta, mutta valitsemalla tieliikenneonnettomuusaineisto GUHA-menetelmän testiaineistoksi haluamme toisaalta testata menetelmän käyttökelpoisuutta reaaliseen, kaikille suhteellisen helposti ymmärrettävään dataan, ja toisaalta toteuttaa osaltamme uuden yliopistolain yliopistolle asettamaa tehtävää toimia vuorovaikutuksessa muun yhteiskunnan kanssa sekä edistää tutkimustulosten yhteiskunnallista vaikuttavuutta. Tutkittua tieliikenneonnettomuusdataa on analysoitu myös Jyväskylän yliopistossa louhimalla sitä muilla tiedonlouhintamenetelmillä. Tämän selvityksen eräänä tavoitteena on tutkia, voidaanko GUHA-menetelmallä löytää myös sellaisia riippuvuuksia, joita tutkimuksessa ei ole raportoitu. AB - Tässä tutkimuksessa analysoidaan Suomessa vuosina 2004-2008 poliisin rekisteröimää 83509 tieliikenneonnettomuutta, joissa loukkaantumisiin johti enemmän kuin joka viides ja kuolemaan 1203 onnettomuutta; näissä enemmän kuin yksi ihmishenki menettiin 90 tapauksessa. Vaikka tieliikennekuolemat ovat lukumääräisesti olleet viime vuosina laskussa, on yksikin kuollut tai loukkaantunut liikaa. Kaikki mikä voidaan tehdä onnettomuuksien vähentämiseksi, on tehtävä. Analysoimalla onnettomuusdataa voidaan mahdollisesti löytää sellaisia syitä ja riippuvuuksia, jotka eivät ole olleet liikennesuunnittelijoiden, lainsäätäjien ja muiden asiantuntijoiden tiedossa ja joihin ei sen vuoksi ole osattu tarttua.Tutkimus on osa Tampereen teknillisen yliopiston matematiikan laitoksen sovelletun logiikan tutkimusryhmän toimintaa. Käyttämämme tutkimusmetodi on GUHA-tiedonlouhintamenetelmä, jonka soveltuvuutta tieliikenneonnettomuusdatan analysoimiseen tässä tutkimusprojektissa selvitetään. Sovelletun logiikan tutkimusryhmällä ei ole erityistä tieliikenneproblematiikan asiantuntemusta, mutta valitsemalla tieliikenneonnettomuusaineisto GUHA-menetelmän testiaineistoksi haluamme toisaalta testata menetelmän käyttökelpoisuutta reaaliseen, kaikille suhteellisen helposti ymmärrettävään dataan, ja toisaalta toteuttaa osaltamme uuden yliopistolain yliopistolle asettamaa tehtävää toimia vuorovaikutuksessa muun yhteiskunnan kanssa sekä edistää tutkimustulosten yhteiskunnallista vaikuttavuutta. Tutkittua tieliikenneonnettomuusdataa on analysoitu myös Jyväskylän yliopistossa louhimalla sitä muilla tiedonlouhintamenetelmillä. Tämän selvityksen eräänä tavoitteena on tutkia, voidaanko GUHA-menetelmallä löytää myös sellaisia riippuvuuksia, joita tutkimuksessa ei ole raportoitu. M3 - Commissioned report T3 - Tampereen teknillinen yliopisto. Matematiikan laitos. Tutkimusraportti BT - Suomessa 2004-2008 sattuneiden tieliikenneonnettomuuksien analysointia GUHA-tiedonlouhintamenetelmällä PB - Tampereen teknillinen yliopisto. Matematiikan laitos CY - Tampere ER - TY - ADVS T1 - Surrogate Model Optimization Toolbox T2 - Matlab central file exchange AU - Müller, Juliane N1 - Contribution: organisation=mat,FACT1=1 Program code is licensed under GNU License 3.0 PY - 2012 Y1 - 2012 M3 - Software ER - TY - GEN T1 - Testing a New Vegetation Structure Retrieval Algorithm from Terrestrial Lidar Scanner Data Using 3D Models AU - Disney, Mathias AU - Lewis, Philip AU - Raumonen, Pasi N1 - ei ut-numeroa 12.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Silvilaser Vancouver 2012 PY - 2012 Y1 - 2012 M3 - Conference contribution T3 - Silvilaser SP - 1 EP - 9 BT - Silvilaser 2012, 12th International Conference on LiDAR Applications for Assessing Forest Ecosystems, 16-19 September 2012, Vancouver, Canada PB - Silvilaser Vancouver 2012 CY - Vancouver, Canada ER - TY - GEN T1 - The Infinite-Dimensional Sylvester Differential Equation and Periodic Output Regulation AU - Paunonen, Lassi N1 - ei ut-numeroa 27.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Springer Basel PY - 2012 Y1 - 2012 U2 - 10.1007/978-3-0348-0297-0_31 DO - 10.1007/978-3-0348-0297-0_31 M3 - Conference contribution SN - 978-3-0348-0296-3 T3 - International Workshop on Operator Theory and Applications SP - 515 EP - 531 BT - Spectral Theory, Mathematical System Theory, Evolution Equations, Differential and Difference Equations. 21st International Workshop on Operator Theory and Applications, Berlin, July 2010. Operator Theory: Advances and Applications. A2 - Arendt, Wolfgang A2 - Ball, Joseph A. A2 - Behrndt, Jussi A2 - Förster, Karl-Heinz A2 - Mehrmann, Volker A2 - Trunk, Carsten PB - Springer Basel CY - Basel, Switzerland ER - TY - GEN T1 - Transforming Innovation Ecosystems Through Network Orchestration: Case EIT ICT Labs AU - Still, Kaisa AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Rubens, Neil N1 - Proceedings julkaistu verkossa, tarvitaan käyttäjätunnus ja salasana. ei ut-numeroa 30.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: International Society for Professional Innovation Management ISPIM PY - 2012 Y1 - 2012 M3 - Conference contribution SN - 978-952-265-242-3 T3 - International Society for Professional Innovation Conference BT - Proceedings of the XXIII ISPIM Conference. Action for Innovation: Innovating from Experience, Barcelona, Spain, 17-20 June 2012 A2 - Huizingh, K.R.E. A2 - Conn, S A2 - Torkkeli, M. A2 - Bitran, I. PB - International Society for Professional Innovation Management ISPIM CY - Manchester, UK ER - TY - GEN T1 - Understanding Mobile Ecosystem Dynamics: a Data-Driven Approach AU - Basole, Rahul C. AU - Russell, Martha G. AU - Huhtamäki, Jukka AU - Rubens, Neil N1 - ei ut-numeroa 9.8.2013

Contribution: organisation=mat,FACT1=1

Publisher name: Delft University of Technology PY - 2012 Y1 - 2012 M3 - Conference contribution T3 - International Conference on Mobile Business SP - 17 EP - 28 BT - Mobile Business in Everyday life: users' routines versus provider's turbulence. Proceedings of the 11th International Conference on Mobile Business, ICMB 2012, June 21-22, 2012, Delft, Netherlands PB - Delft University of Technology CY - Delft, The Netherlands ER - TY - BOOK T1 - User Guide for Modularized Surrogate Model Toolbox AU - Müller, Juliane N1 - Osa opetusmateriaalia Surrogate Model Optimization Toolbox

Contribution: organisation=mat,FACT1=1 PY - 2012 Y1 - 2012 N2 - This user guide accompanies the surrogate model toolbox for global optimization problems. The toolbox is made for computationally expensive black-box global optimization problems with continuous, integer, or mixed-integer variables. Problems where several or all variables have to be integers may also have black-box constraints, whereas purely continuous problems may only have box constraints. For problems with computationally cheap function evaluations the toolbox may not be very efficient. Surrogate models are intended to be used when function evaluations take from several minutes to several hours or more. When reading this manual it is recommended to simultaneously take a look at the code. The code is set up such that the user only has to define his/her optimization problem in a Matlab file (see Section 6.1). Additional input such as the surrogate model to be used, the sampling strategy, or starting points are optional (see Section 6). This document is structured as follows. In Section 2 the general structure of a surrogate model algorithm is summarized. The installation is described in Section 3. The dependencies of the single functions in the code are shown in Section 4. Section 5 briefly summarizes how the surrogate model algorithm works in general. Section 6 describes the options for the input of the main function. In Section 7 the input and output of the single subfunctions of the algorithm are described. Examples for using the surrogate model algorithm are given in Section 8. In Section 9 it is explained how the user can define an own (mixture) surrogate model and an example is given. The elements of the saved results are described in Section 10. AB - This user guide accompanies the surrogate model toolbox for global optimization problems. The toolbox is made for computationally expensive black-box global optimization problems with continuous, integer, or mixed-integer variables. Problems where several or all variables have to be integers may also have black-box constraints, whereas purely continuous problems may only have box constraints. For problems with computationally cheap function evaluations the toolbox may not be very efficient. Surrogate models are intended to be used when function evaluations take from several minutes to several hours or more. When reading this manual it is recommended to simultaneously take a look at the code. The code is set up such that the user only has to define his/her optimization problem in a Matlab file (see Section 6.1). Additional input such as the surrogate model to be used, the sampling strategy, or starting points are optional (see Section 6). This document is structured as follows. In Section 2 the general structure of a surrogate model algorithm is summarized. The installation is described in Section 3. The dependencies of the single functions in the code are shown in Section 4. Section 5 briefly summarizes how the surrogate model algorithm works in general. Section 6 describes the options for the input of the main function. In Section 7 the input and output of the single subfunctions of the algorithm are described. Examples for using the surrogate model algorithm are given in Section 8. In Section 9 it is explained how the user can define an own (mixture) surrogate model and an example is given. The elements of the saved results are described in Section 10. UR - http://urn.fi/URN:NBN:fi:tty-201210051317 M3 - Commissioned report T3 - TUT DPub BT - User Guide for Modularized Surrogate Model Toolbox PB - Tampere University of Technology CY - Tampere ER - TY - GEN T1 - Using unlocated fingerprints in generation of WLAN maps for indoor positioning AU - Raitoharju, Matti AU - Fadjukoff, Toni AU - Ali-Löytty, Simo AU - Piche, Robert N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2012 Y1 - 2012 N2 - This paper presents five methods for generation of WLAN maps for indoor positioning using crowdsourced fingerprints. A fingerprint is assumed to contain identifiers of WLAN access points, received signal strength values and, if the fingerprint is collected outdoors, a GPS position. The proposed methods use the fingerprints’ information to generate a WLAN map that contains estimated access point locations. Two of the proposed methods use RSS values in access point location estimation. In our evaluation with simulations and with real data, the Access Point Least Squares method, which does not use RSS information, is the fastest and its accuracy is as good as more complex methods that use RSS information. AB - This paper presents five methods for generation of WLAN maps for indoor positioning using crowdsourced fingerprints. A fingerprint is assumed to contain identifiers of WLAN access points, received signal strength values and, if the fingerprint is collected outdoors, a GPS position. The proposed methods use the fingerprints’ information to generate a WLAN map that contains estimated access point locations. Two of the proposed methods use RSS values in access point location estimation. In our evaluation with simulations and with real data, the Access Point Least Squares method, which does not use RSS information, is the fastest and its accuracy is as good as more complex methods that use RSS information. U2 - 10.1109/PLANS.2012.6236930 DO - 10.1109/PLANS.2012.6236930 M3 - Conference contribution SN - 978-1-4673-0385-9 T3 - IEEE/ION Position Location and Navigation Symposium SP - 576 EP - 583 BT - 2012 IEEE/ION Position Location and Navigation Symposium PLANS, 23-26 April 2012, Myrtle Beach, SC, USA PB - Institute of Electrical and Electronics Engineers IEEE CY - Piscataway, NJ ER - TY - BOOK T1 - Output Regulation Theory for Linear Systems with Infinite-Dimensional and Periodic Exosystems AU - Paunonen, Lassi N1 - Awarding institution:Tampere University of Technology PY - 2011/11/4 Y1 - 2011/11/4 N2 - In this thesis we consider the output regulation problem consisting of choosing a controller to asymptotically steer the output of a linear infinite-dimensional system to a given reference signal despite external disturbances. In particular we are interested in a situation where the considered reference and disturbance signals are nonsmooth polynomially bounded functions. The existing theory on this problem can only be used in the case where the signals to be tracked and rejected are smooth and polynomially bounded, or nonsmooth but uniformly bounded functions. The availability of more general reference and disturbance signals is useful in many applications such as the control of robot arms and disk drive systems. For generating our reference and disturbance signals we consider two separate methods, namely, a time-invariant infinite-dimensional exosystem and a periodically time-dependent finite-dimensional exosystem. We will see that the chosen method has a considerable effect on the properties of the resulting control law as well as on the behavior of the controlled closed-loop system. One of the main differences in these respective theories of output regulation is that the control law designed based on the infinite-dimensional exosystem is guaranteed to be robust with respect to a class of perturbations preserving the stability of the closed-loop system. The first main result of this thesis is the generalization of the well-known internal model principle of finite-dimensional control theory for distributed parameter systems with infinite-dimensional exosystems. On a general level this result states that in order for a controller to solve the robust output regulation problem related to a given signal generator, the controller must be able to reproduce the dynamics of this exosystem. In addition to its theoretical significance the internal model principle can also be applied in the construction of controllers solving the robust output regulation problem. Our proof of this result is based on a close connection between the behavior of the state of the closed-loop system and an associated Sylvester operator equation. In particular, the controllers achieving asymptotic tracking of the reference signals can be characterized using the solvability of certain constrained Sylvester equations, and the robustness of this property can be expressed as a condition involving equations of this type. The second main contribution of this thesis consists of the development of the theory of output regulation for infinite-dimensional systems with periodically time-dependent exosystems. In particular this also includes designing nonautonomous controllers achieving asymptotic output tracking and disturbance rejection. Our treatment shows that it is possible to study the output regulation problem for a distributed parameter system together with a nonautonomous exosystem using methods similar to the ones familiar from case of a time-invariant signal generator. In particular, the solvability of the problem related to a given periodic exosystem can be characterized using a periodically time-dependent version of the well-known regulator equations if the associated Sylvester operator equation is replaced with an infinite-dimensional Sylvester differential equation. AB - In this thesis we consider the output regulation problem consisting of choosing a controller to asymptotically steer the output of a linear infinite-dimensional system to a given reference signal despite external disturbances. In particular we are interested in a situation where the considered reference and disturbance signals are nonsmooth polynomially bounded functions. The existing theory on this problem can only be used in the case where the signals to be tracked and rejected are smooth and polynomially bounded, or nonsmooth but uniformly bounded functions. The availability of more general reference and disturbance signals is useful in many applications such as the control of robot arms and disk drive systems. For generating our reference and disturbance signals we consider two separate methods, namely, a time-invariant infinite-dimensional exosystem and a periodically time-dependent finite-dimensional exosystem. We will see that the chosen method has a considerable effect on the properties of the resulting control law as well as on the behavior of the controlled closed-loop system. One of the main differences in these respective theories of output regulation is that the control law designed based on the infinite-dimensional exosystem is guaranteed to be robust with respect to a class of perturbations preserving the stability of the closed-loop system. The first main result of this thesis is the generalization of the well-known internal model principle of finite-dimensional control theory for distributed parameter systems with infinite-dimensional exosystems. On a general level this result states that in order for a controller to solve the robust output regulation problem related to a given signal generator, the controller must be able to reproduce the dynamics of this exosystem. In addition to its theoretical significance the internal model principle can also be applied in the construction of controllers solving the robust output regulation problem. Our proof of this result is based on a close connection between the behavior of the state of the closed-loop system and an associated Sylvester operator equation. In particular, the controllers achieving asymptotic tracking of the reference signals can be characterized using the solvability of certain constrained Sylvester equations, and the robustness of this property can be expressed as a condition involving equations of this type. The second main contribution of this thesis consists of the development of the theory of output regulation for infinite-dimensional systems with periodically time-dependent exosystems. In particular this also includes designing nonautonomous controllers achieving asymptotic output tracking and disturbance rejection. Our treatment shows that it is possible to study the output regulation problem for a distributed parameter system together with a nonautonomous exosystem using methods similar to the ones familiar from case of a time-invariant signal generator. In particular, the solvability of the problem related to a given periodic exosystem can be characterized using a periodically time-dependent version of the well-known regulator equations if the associated Sylvester operator equation is replaced with an infinite-dimensional Sylvester differential equation. M3 - Doctoral thesis SN - 978-952-15-2664-0 T3 - Tampere University of Technology. Publication BT - Output Regulation Theory for Linear Systems with Infinite-Dimensional and Periodic Exosystems PB - Tampere University of Technology CY - Tampere ER - TY - JOUR T1 - Absolute radiometric calibration of ALS intensity data: Effects on accuracy and target classification AU - Kaasalainen, Sanna AU - Pyysalo, Ulla AU - Krooks, Anssi AU - Vain, Ants AU - Kukko, Antero AU - Hyyppä, Juha AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.3390/s111110586 DO - 10.3390/s111110586 M3 - Article VL - 11 SP - 10586 EP - 10602 JO - Sensors JF - Sensors SN - 1424-8220 IS - 11 ER - TY - CHAP T1 - A differential form approach to Dirac operators on surfaces AU - Orelma, Heikki AU - Sommen, Frank N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1007/978-3-0346-0246-4_15 DO - 10.1007/978-3-0346-0246-4_15 M3 - Chapter SN - 978-3-0346-0245-7 SP - 213 EP - 232 BT - Hypercomplex Analysis and Applications. Trends in Mathematics A2 - Sabadini, Irene A2 - Sommen, Frank PB - Birkhäuser CY - Basel ER - TY - BOOK T1 - Advances in Augmented Reality Technologies AU - Pylvänäinen, Timo N1 - Awarding institution:Tampere University of Technology PY - 2011 Y1 - 2011 M3 - Doctoral thesis SN - 978-952-15-2611-4 T3 - Tampere University of Technology. Publication BT - Advances in Augmented Reality Technologies PB - Tampere University of Technology CY - Tampere ER - TY - JOUR T1 - A Framework for Bayesian Receiver Autonomous Integrity Monitoring in Urban Navigation AU - Pesonen, Henri N1 - ei ut-numeroa 26.4.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Article VL - 58 SP - 229 EP - 240 JO - Navigation JF - Navigation SN - 0028-1522 IS - 3 ER - TY - CHAP T1 - A hyperbolic interpretation of Cauchy-type kernels in hyperbolic function theory in hypercomplex analysis AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1007/978-3-0346-0246-4_4 DO - 10.1007/978-3-0346-0246-4_4 M3 - Chapter SN - 978-3-0346-0245-7 SP - 43 EP - 59 BT - Hypercomplex Analysis and Applications. Trends in Mathematics A2 - Sabadini, Irene A2 - Sommen, Frank PB - Birkhäuser CY - Basel ER - TY - GEN T1 - Alumni Network Analysis AU - Rubens, Neil AU - Russell, Martha G. AU - Perez, Rafael AU - Huhtamäki, Jukka AU - Still, Kaisa AU - Kaplan, Dain AU - Okamoto, Toshio N1 - ei ut-numeroa 5.3.2014

Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1109/EDUCON.2011.5773200 DO - 10.1109/EDUCON.2011.5773200 M3 - Conference contribution SN - 978-1-61284-642-2 T3 - IEEE Global Engineering Education Conference EDUCON SP - 606 EP - 611 BT - 2011 IEEE 2nd Global Engineering Education Conference EDUCON, 4-6 April 2011, Amman, Jordan PB - IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - A Mean-Value Theorem for Some Eigenfunctions of the Laplace -Beltrami Operator on the Upper-Half Space AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.5186/aasfm.2011.3606 DO - 10.5186/aasfm.2011.3606 M3 - Article VL - 36 SP - 101 EP - 110 JO - Annales Academiae Scientiarum Fennicae-Mathematica JF - Annales Academiae Scientiarum Fennicae-Mathematica SN - 1239-629X ER - TY - PAT T1 - A method of tracking a state of a mobile electronic device AU - Sirola, Niilo AU - Ali-Löytty, Simo N1 - h3tut > h1 : Pat.Appl.PCT/EP2006/002272(2006.03.07)

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Patent M1 - Pat. KR 101106276 ER - TY - BOOK T1 - A Monocular Camera Gyroscope AU - Huttunen, Ville AU - Piche, Robert N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 N2 - We present a method for tracking the 3-axis orientation of a monocular camera using orthogonal vanishing points detected in individual frames of a sequence of images. Robust and real-time vanishing point detection is done using a standard line segment detection method and an adaptive RANSAC algorithm. Vanishing points and corresponding vanishing directions found in consecutive frames are associated with each other to produce a sequence of orientation quaternions, which is processed by an extended Kalman filter. Experiments with a consumer-level, handheld mobile device indicate that the accuracy of the proposed method is comparable with those of consumer-grade inertial motion sensors. AB - We present a method for tracking the 3-axis orientation of a monocular camera using orthogonal vanishing points detected in individual frames of a sequence of images. Robust and real-time vanishing point detection is done using a standard line segment detection method and an adaptive RANSAC algorithm. Vanishing points and corresponding vanishing directions found in consecutive frames are associated with each other to produce a sequence of orientation quaternions, which is processed by an extended Kalman filter. Experiments with a consumer-level, handheld mobile device indicate that the accuracy of the proposed method is comparable with those of consumer-grade inertial motion sensors. M3 - Commissioned report SN - 978-952-15-2627-5 T3 - Tampereen teknillinen yliopisto. Matematiikan laitos. Tutkimusraportti BT - A Monocular Camera Gyroscope PB - Tampereen teknillinen yliopisto CY - Tampere ER - TY - JOUR T1 - Analysis of Incidence Angle and Distance Effects on Terrestrial Laser Scanner Intensity: Search for Correction Methods AU - Kaasalainen, Sanna AU - Jaakkola, Anttoni AU - Kaasalainen, Mikko AU - Krooks, Anssi AU - Kukko, Antero N1 - Otsikko alunperin: Analysis of topographic and distance effects on TLS intensity: Search for correction methods

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.3390/rs3102207 DO - 10.3390/rs3102207 M3 - Article VL - 3 SP - 2207 EP - 2221 JO - Remote Sensing JF - Remote Sensing SN - 2072-4292 IS - 10 ER - TY - GEN T1 - A Network-Centric Snapshot of Value Co-Creation in Finnish Innovation Financing AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Still, Kaisa AU - Rubens, Neil N1 - ei ut-numeroa 8.3.2014

Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution SN - 978-952-15-2529-2 T3 - Research Forum to Understand Business in Knowledge Society EBRF SP - 1 EP - 15 BT - EBRF 2010, Research Forum to Understand Business in Knowledge Society, September 15-17, 2010, Nokia, Finland A2 - Seppä, Marko A2 - Helander, Nina A2 - Ilvonen, Ilona PB - GVL Finland CY - Nokia ER - TY - CHAP T1 - A Network-Centric Snapshot of Value Co-Creation in Finnish Innovation Financing AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Still, K. AU - Rubens, Neil N1 - ei ut-numeroa 8.3.2014

Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Chapter SP - 13 EP - 21 BT - The Open Source Business Resource A2 - McPhee, Chris A2 - Seppä, Marko A2 - Tanev, Stoyan PB - Talent First Network ER - TY - JOUR T1 - An implementation of a semantic, web-based virtual machine laboratory prototyping environment AU - Salonen, Jaakko AU - Nykänen, Ossi AU - Ranta, Pekka AU - Nurmi, Juha AU - Helminen, Matti AU - Rokala, Markus AU - Palonen, Tuija AU - Alarotu, Vänni AU - Koskinen, Kari AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=0.5

Contribution: organisation=iha,FACT2=0.5 PY - 2011 Y1 - 2011 N2 - Creation of virtual machine laboratories – simulated planning and learning environments demonstrating function and structure of working machines – often involve a lot of manual labor. A notable source of the labor is the programming required due to changes in structural and functional models of a system. As a result, rapid prototyping of a virtual machine laboratory becomes difficult, if not impossible. We argue that by using a combination of semantic modeling and prototyping with a web-based system, more rapid development of virtual machine laboratories can be achieved. In this paper, we present the design and implementation of a semantic, web-based virtual machine laboratory prototyping environment. Application of the environment to a case example is also described and discussed. AB - Creation of virtual machine laboratories – simulated planning and learning environments demonstrating function and structure of working machines – often involve a lot of manual labor. A notable source of the labor is the programming required due to changes in structural and functional models of a system. As a result, rapid prototyping of a virtual machine laboratory becomes difficult, if not impossible. We argue that by using a combination of semantic modeling and prototyping with a web-based system, more rapid development of virtual machine laboratories can be achieved. In this paper, we present the design and implementation of a semantic, web-based virtual machine laboratory prototyping environment. Application of the environment to a case example is also described and discussed. U2 - 10.1007/978-3-642-25093-4_15 DO - 10.1007/978-3-642-25093-4_15 M3 - Article VL - 7032 SP - 221 EP - 236 JO - Lecture Notes in Computer Science JF - Lecture Notes in Computer Science SN - 0302-9743 ER - TY - JOUR T1 - Apparent wind load effects on the tether of a kite power generator AU - Argatov, Ivan AU - Rautakorpi, Pauli AU - Silvennoinen, Risto N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1016/j.jweia.2011.07.010 DO - 10.1016/j.jweia.2011.07.010 M3 - Article VL - 99 SP - 1079 EP - 1088 JO - Journal of Wind Engineering and Industrial Aerodynamics JF - Journal of Wind Engineering and Industrial Aerodynamics SN - 0167-6105 IS - 10 ER - TY - GEN T1 - Approximation of Volume and Branch Size Distribution of Trees from Laser Scanner Data AU - Raumonen, Pasi AU - Kaasalainen, Sanna AU - Kaasalainen, Mikko AU - Kaartinen, Harri N1 - ei ut-numeroa 3.5.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution T3 - ISPRS Workshop Laser Scanning SP - 1 EP - 6 BT - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, ISPRS Workshop Laser Scanning, 2011, 29.-31.8.2011, Calgary, Canada PB - ISPRS CY - Calgary ER - TY - JOUR T1 - A Self-Tuning Robust Regulator for Infinite-Dimensional Systems AU - Hämäläinen, Timo AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1

Publisher name: Institute of Electrical and Electronics Engineers IEEE PY - 2011 Y1 - 2011 U2 - 10.1109/TAC.2011.2129310 DO - 10.1109/TAC.2011.2129310 M3 - Article VL - 56 SP - 2116 EP - 2127 JO - IEEE Transactions on Automatic Control JF - IEEE Transactions on Automatic Control SN - 0018-9286 IS - 9 ER - TY - GEN T1 - Autonomous satellite orbit prediction AU - Seppänen, Mari N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 N2 - A method to predict satellite orbits in a GPS device without a network connection is presented. The motivation for this work was to improve the startup performance of a navigation device without Assisted GPS. Tests of our algorithm show that in 95% of the cases the error in satellite’s predicted position stays under 21 meters for one day and under 94 meters for three days. AB - A method to predict satellite orbits in a GPS device without a network connection is presented. The motivation for this work was to improve the startup performance of a navigation device without Assisted GPS. Tests of our algorithm show that in 95% of the cases the error in satellite’s predicted position stays under 21 meters for one day and under 94 meters for three days. M3 - Conference contribution SN - 978-952-15-2557-5 T3 - TISE Seminar SP - 5 EP - 10 BT - Digest of TISE Seminar 2011. TISE publications A2 - Niemistö, Antti PB - Tampere Graduate School in Information Science and Engineering (TISE). Tampere University of Technology CY - Tampere ER - TY - GEN T1 - Autonomous satellite orbit prediction AU - Seppänen, Mari AU - Perälä, Tommi AU - Piche, Robert N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 N2 - A method to predict satellite orbits in a GPS device without a network connection is presented. The motivation for this work was to reduce time to first fix when assistance data is not available. The orbit of a satellite is predicted by numerically integrating the differential equation that models its motion. The initial position and velocity values used in prediction correspond to those received from the broadcast when the device was last operated. These initial values are given in the Earth centered, Earth fixed reference frame and have to be transformed into an inertial reference frame prior to substitution into the equation of motion and subsequent integration. For this purpose, one needs to predict the movement of Earth’s rotation axis with respect to both space (nutation and precession) and to the Earth’s crust (polar motion). Using precise ephemeris as the initial condition, we found that this kind of model gave quite accurate prediction results. However, the results were worse when initial conditions were computed from the less accurate broadcast ephemeris which, unfortunately, is the only ephemeris available to the navigation device without a network connection. In addition, we were not able to find a model that would be able to predict Earth’s polar motion with sufficient accuracy within the assumed lifetime of the device. Without the polar motion parameters, one cannot do the transformation from ECEF to an inertial reference frame. In this paper we will present a method to improve the accuracy of the initial velocity of the satellite computed from the broadcast and simultaneously solve the unknown polar motion parameters. Tests of our algorithm show that in 95%of the cases the error in satellite’s predicted position stays under 21 meters for one day and under 94 meters for three days. AB - A method to predict satellite orbits in a GPS device without a network connection is presented. The motivation for this work was to reduce time to first fix when assistance data is not available. The orbit of a satellite is predicted by numerically integrating the differential equation that models its motion. The initial position and velocity values used in prediction correspond to those received from the broadcast when the device was last operated. These initial values are given in the Earth centered, Earth fixed reference frame and have to be transformed into an inertial reference frame prior to substitution into the equation of motion and subsequent integration. For this purpose, one needs to predict the movement of Earth’s rotation axis with respect to both space (nutation and precession) and to the Earth’s crust (polar motion). Using precise ephemeris as the initial condition, we found that this kind of model gave quite accurate prediction results. However, the results were worse when initial conditions were computed from the less accurate broadcast ephemeris which, unfortunately, is the only ephemeris available to the navigation device without a network connection. In addition, we were not able to find a model that would be able to predict Earth’s polar motion with sufficient accuracy within the assumed lifetime of the device. Without the polar motion parameters, one cannot do the transformation from ECEF to an inertial reference frame. In this paper we will present a method to improve the accuracy of the initial velocity of the satellite computed from the broadcast and simultaneously solve the unknown polar motion parameters. Tests of our algorithm show that in 95%of the cases the error in satellite’s predicted position stays under 21 meters for one day and under 94 meters for three days. M3 - Conference contribution T3 - Institute of Navigation International Technical Meeting SP - 554 EP - 564 BT - Proceedings of The Institute of Navigation 2011 International Technical Meeting, January 24-26, 2011, San Diego, CA, USA PB - The Institute of Navigation CY - San Diego, CA ER - TY - GEN T1 - Axiomatic Extensions of Höhle's Monoidal Logic AU - Turunen, Esko N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution SN - 978-90-7877-00-0 T3 - Conference of the European Society for Fuzzy Logic and Technology EUSFLAT-LFA SP - 163 EP - 168 BT - Proceedings of the 7th conference of the European Society for Fuzzy Logic and Technology EUSFLAT-LFA 2011, Aix-Les-Bains, France, 18 - 22 July 2011 PB - Atlantis Press CY - Amsterdam ER - TY - GEN T1 - Bayesian Positioning Using Gaussian Mixture Models with Time-varying Component Weights AU - Pesonen, Henri AU - Piche, Robert N1 - ei ut-numeroa 26.4.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 N2 - Gaussian mixture models are often used in target tracking applications to take into account maneuvers in state dynamics or changing levels of observation noise. In this study it is assumed that the measurement or the state transition model can have two plausible candidates, as for example in positioning with line-of-sight or non-line-sight-signals. The plausibility described by the mixture component weight is modeled as a time-dependent random variable and is formulated as a Markov process with a heuristic model based on the Beta distribution. The proposed system can be used to approximate some well-known multiple model systems by tuning the parameter of the state transition distribution for the component weight. The posterior distribution of the state can be solved approximately using a Rao-Blackwellized particle filter. Simulations of GPS pedestrian tracking are used to test the proposed method. The results indicate that the new system is able to find the true models and its root mean square error-performance is comparable to filters that know the true models. AB - Gaussian mixture models are often used in target tracking applications to take into account maneuvers in state dynamics or changing levels of observation noise. In this study it is assumed that the measurement or the state transition model can have two plausible candidates, as for example in positioning with line-of-sight or non-line-sight-signals. The plausibility described by the mixture component weight is modeled as a time-dependent random variable and is formulated as a Markov process with a heuristic model based on the Beta distribution. The proposed system can be used to approximate some well-known multiple model systems by tuning the parameter of the state transition distribution for the component weight. The posterior distribution of the state can be solved approximately using a Rao-Blackwellized particle filter. Simulations of GPS pedestrian tracking are used to test the proposed method. The results indicate that the new system is able to find the true models and its root mean square error-performance is comparable to filters that know the true models. M3 - Conference contribution T3 - Joint Statistical Meetings JSM SP - 4516 EP - 4524 BT - JSM 2011 Joint Statistical Meetings 2011, Miami Beach, Florida, USA, July 30-August 4, 2011 PB - American Statistical Association CY - Miami Beach, FL ER - TY - GEN T1 - Business Angels and Investment Organizations as Networked Co-creators of the Finnish Innovation Ecosystem AU - Huhtamäki, Jukka AU - Russell, Martha G. AU - Still, K. AU - Rubens, Neil AU - Yu, Jiafeng (Camilla) N1 - ei ut-numeroa 8.3.2014

Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution T3 - Triple Helix International Conference SP - 1 EP - 15 BT - Proceedings of the Triple Helix IX International Conference: Silicon Valley: Global Model or Unique Anomaly? 11-14 July, 2011, Stanford, California, USA PB - Stanford University, H-STAR Institute Center for Innovation and Communication CY - Stanford, CA ER - TY - JOUR T1 - Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes AU - Durech, Josef AU - Kaasalainen, Mikko AU - Herald, David AU - Dunham, David AU - Timerson, Brad AU - Hanus, Josef AU - Frappa, Eric AU - Talbot, John AU - Hayamizu, Tsutomu AU - Warener, Brian D. AU - Pilcher, Frederick AU - Galad, Adrian N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1016/j.icarus.2011.03.016 DO - 10.1016/j.icarus.2011.03.016 M3 - Article VL - 214 SP - 652 EP - 670 JO - Icarus JF - Icarus SN - 0019-1035 IS - 2 ER - TY - JOUR T1 - Commutative bounded integral residuated orthomodular lattices are Boolean algebras AU - Tladlec, Josef AU - Turunen, Esko N1 - online first March 10, 2010

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1007/s00500-010-0572-4 DO - 10.1007/s00500-010-0572-4 M3 - Article VL - 15 SP - 635 EP - 636 JO - Soft Computing JF - Soft Computing SN - 1432-7643 IS - 4 ER - TY - JOUR T1 - Computational study of noise in a large signal transduction network AU - Intosalmi, Jukka AU - Manninen, Tiina AU - Ruohonen, Keijo AU - Linne, Marja-Leena N1 - Contribution: organisation=sgn,FACT1=0.5

Contribution: organisation=mat,FACT2=0.5 PY - 2011 Y1 - 2011 U2 - 10.1186/1471-2105-12-252 DO - 10.1186/1471-2105-12-252 M3 - Article VL - 12 SP - 1 EP - 8 JO - BMC Bioinformatics JF - BMC Bioinformatics SN - 1471-2105 M1 - 252 ER - TY - JOUR T1 - Dimensional Reduction of Electromagnetic Boundary Value Problems AU - Raumonen, Pasi AU - Suuriniemi, Saku AU - Kettunen, Lauri N1 - 50 % Matematiikka, 50 % Sähkömagnetiikka

Contribution: organisation=mat,FACT1=0.5

Contribution: organisation=ele smg,FACT2=0.5 PY - 2011 Y1 - 2011 U2 - 10.1186/1687-2770-2011-9 DO - 10.1186/1687-2770-2011-9 M3 - Article VL - 2011 SP - 1 EP - 25 JO - Boundary Value Problems JF - Boundary Value Problems SN - 1687-2762 M1 - 9 ER - TY - JOUR T1 - Directed structure at infinity for infinite-dimensional systems AU - Laakkonen, Petteri AU - Pohjolainen, Seppo N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1080/00207179.2011.572999 DO - 10.1080/00207179.2011.572999 M3 - Article VL - 84 SP - 702 EP - 715 JO - International Journal of Control JF - International Journal of Control SN - 0020-7179 IS - 4 ER - TY - JOUR T1 - Discrete maximum principles for FE solutions of nonstationary diffusion-reaction problems with mixed boundary conditions AU - Farago, I. AU - Horvath, R. AU - Korotov, Sergey N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1002/num.20547 DO - 10.1002/num.20547 M3 - Article VL - 27 SP - 702 EP - 720 JO - Numerical Methods for Partial Differential Equations JF - Numerical Methods for Partial Differential Equations SN - 0749-159X IS - 3 ER - TY - GEN T1 - Explaining innovation with indicators of mobility and networks: Insights into central innovation nodes in Europe AU - Still, Kaisa AU - Russell, Martha G. AU - Huhtamäki, Jukka AU - Turpeinen, Marko AU - Rubens, Neil N1 - ei ut-numeroa 17.5.2014

Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution T3 - Triple Helix International Conference SP - 1 EP - 17 BT - Proceedings of the Triple Helix IX International Conference: Silicon Valley: Global Model or Unique Anomaly? 11-14 July, 2011, Stanford, California, USA PB - Stanford University, H-STAR Institute Center for Innovation and Communication CY - Stanford, CA ER - TY - JOUR T1 - Forecasting the diffusion of innovation: A stochastic bass model with log-normal and mean-reverting error process AU - Kanniainen, Juho AU - Mäkinen, Saku AU - Piche, Robert AU - Chakrabarti, Alok N1 - Contribution: organisation=tta,FACT1=0.75

Contribution: organisation=mat,FACT2=0.25 PY - 2011 Y1 - 2011 N2 - Forecasting the diffusion of innovations plays a major role in managing technology development and in engineering management overall. In this paper, we extend the conventional Bass model stochastically by specifying the error process of sales as log-normal and mean-reverting. Our model satisfies the following reasonable properties, which are generally ignored in the existing literature: sales cannot be negative, the error process can have a memory, and sales fluctuate more when they are high and less when they are low. The conventional and widely used model that assumes normally distributed error term does not have these properties. We address how to forecast properly under the log-normal and mean-reverting error process, and show analytically and numerically that in our extended model sales forecasts can substantially alter conventional Bass forecasts. We also analyze the model empirically, showing that our extension can improve the accuracy of future sales forecasts. AB - Forecasting the diffusion of innovations plays a major role in managing technology development and in engineering management overall. In this paper, we extend the conventional Bass model stochastically by specifying the error process of sales as log-normal and mean-reverting. Our model satisfies the following reasonable properties, which are generally ignored in the existing literature: sales cannot be negative, the error process can have a memory, and sales fluctuate more when they are high and less when they are low. The conventional and widely used model that assumes normally distributed error term does not have these properties. We address how to forecast properly under the log-normal and mean-reverting error process, and show analytically and numerically that in our extended model sales forecasts can substantially alter conventional Bass forecasts. We also analyze the model empirically, showing that our extension can improve the accuracy of future sales forecasts. U2 - 10.1109/TEM.2010.2048912 DO - 10.1109/TEM.2010.2048912 M3 - Article VL - 99 SP - 1 EP - 22 JO - IEEE Transactions on Engineering Management JF - IEEE Transactions on Engineering Management SN - 0018-9391 ER - TY - GEN T1 - Gender and Innovation: Networks of Executive Women in Technology-Based Companies AU - Still, Kaisa AU - Russell, Martha G. AU - Huhtamäki, Jukka AU - Yu, Jiafeng (Camilla) AU - Rubens, Neil N1 - ei ut-numeroa 17.5.2014

Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution T3 - Triple Helix International Conference SP - 1 EP - 20 BT - Proceedings of the Triple Helix IX International Conference: Silicon Valley: Global Model or Unique Anomaly? 11-14 July, 2011, Stanford, California, USA PB - Stanford University, H-STAR Institute Center for Innovation and Communication CY - Stanford, CA ER - TY - JOUR T1 - Images of asteroid 21 Lutetia: A remnant planetesimal from the early solar system AU - Sierks, H. AU - Lamy, P. AU - Barbieri, C. AU - Koschny, D. AU - Rickman, H. AU - Rodrigo, R. AU - A'Hearn, M.F. AU - Angrilli, F. AU - Barucci, M.A. AU - Bertaux, J.-L. AU - Bertini, I. AU - Besse, S. AU - Carry, B. AU - Cremonese, G. AU - Da Deppo, V. AU - Davidsson, B. AU - Debei, S. AU - De Cecco, M. AU - De Leon, J. AU - Ferri, F. AU - Fornasier, S. AU - Fulle, M. AU - Hviid, S.F. AU - Gaskell, R.W. AU - Groussin, O. AU - Gutierrez, P. AU - Ip, W. AU - Jorda, L. AU - Kaasalainen, M. AU - Keller, H.U. AU - Knollenberg, J. AU - Kramm, R. AU - Kührt, E. AU - Küppers, M. AU - Lara, L. AU - Lazzarin, M. AU - Leyrat, C. AU - Lopez Moreno, J.J. AU - Magrin, S. AU - Marchi, S. AU - Marzari, F. AU - Massironi, M. AU - Michalik, H. AU - Moissl, R. AU - Naletto, G. AU - Preusker, F. AU - Sabau, L. AU - Sabolo, W. AU - Scholten, F. AU - Snodgrass, C. AU - Thomas, N. AU - Tubiana, C. AU - Vernazza, P. AU - Vincent, J.-B. AU - Wenzel, K.-P. AU - Andert, T. AU - Pätzold, M. AU - Weiss, B.P N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1126/science.1207325 DO - 10.1126/science.1207325 M3 - Article VL - 334 SP - 487 EP - 490 JO - Science JF - Science SN - 0036-8075 IS - 6055 ER - TY - JOUR T1 - Information Diversity in Structure and Dynamics of Simulated Neuronal Networks AU - Mäki-Marttunen, Tuomo AU - Acimovic, Jugoslava AU - Nykter, Matti AU - Kesseli, Juha AU - Ruohonen, Keijo AU - Yli-Harja, Olli AU - Linne, Marja-Leena N1 - Ei UT-numeroa 5.4.2014

Contribution: organisation=sgn,FACT1=0.7

Contribution: organisation=mat,FACT2=0.3 PY - 2011 Y1 - 2011 N2 - Neuronal networks exhibit a wide diversity of structures, which contributes to the diversity of the dynamics therein. The presented work applies an information theoretic framework to simultaneously analyze structure and dynamics in neuronal networks. Information diversity within the structure and dynamics of a neuronal network is studied using the normalized compression distance. To describe the structure, a scheme for generating distance-dependent networks with identical in-degree distribution but variable strength of dependence on distance is presented. The resulting network structure classes possess differing path length and clustering coefficient distributions. In parallel, comparable realistic neuronal networks are generated with NETMORPH simulator and similar analysis is done on them. To describe the dynamics, network spike trains are simulated using different network structures and their bursting behaviors are analyzed. For the simulation of the network activity the Izhikevich model of spiking neurons is used together with the Tsodyks model of dynamical synapses. We show that the structure of the simulated neuronal networks affects the spontaneous bursting activity when measured with bursting frequency and a set of intraburst measures: the more locally connected produce more and longer bursts than the more random networks. The information diversity of the structure of a network is greatest in the most locally connected, smallest in random networks, and somewhere in between in the networks between order and disorder. As for the dynamics, the most locally connected and some of the in-between networks produce the most complex intraburst spike trains. The same result also holds for sparser of the two considered network densities in the case of full spike trains. AB - Neuronal networks exhibit a wide diversity of structures, which contributes to the diversity of the dynamics therein. The presented work applies an information theoretic framework to simultaneously analyze structure and dynamics in neuronal networks. Information diversity within the structure and dynamics of a neuronal network is studied using the normalized compression distance. To describe the structure, a scheme for generating distance-dependent networks with identical in-degree distribution but variable strength of dependence on distance is presented. The resulting network structure classes possess differing path length and clustering coefficient distributions. In parallel, comparable realistic neuronal networks are generated with NETMORPH simulator and similar analysis is done on them. To describe the dynamics, network spike trains are simulated using different network structures and their bursting behaviors are analyzed. For the simulation of the network activity the Izhikevich model of spiking neurons is used together with the Tsodyks model of dynamical synapses. We show that the structure of the simulated neuronal networks affects the spontaneous bursting activity when measured with bursting frequency and a set of intraburst measures: the more locally connected produce more and longer bursts than the more random networks. The information diversity of the structure of a network is greatest in the most locally connected, smallest in random networks, and somewhere in between in the networks between order and disorder. As for the dynamics, the most locally connected and some of the in-between networks produce the most complex intraburst spike trains. The same result also holds for sparser of the two considered network densities in the case of full spike trains. U2 - 10.3389/fncom.2011.00026 DO - 10.3389/fncom.2011.00026 M3 - Article VL - 5 SP - 1 EP - 17 JO - Frontiers in Computational Neuroscience JF - Frontiers in Computational Neuroscience SN - 1662-5188 M1 - 26 ER - TY - JOUR T1 - Invertibility and Dedekind finiteness in structural matrix rings AU - Foldes, Stephan AU - Szigeti, Jeno AU - van Wyk, Leon N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.1080/03081080903357653 DO - 10.1080/03081080903357653 M3 - Article VL - 59 SP - 221 EP - 227 JO - Linear and Multilinear Algebra JF - Linear and Multilinear Algebra SN - 0308-1087 IS - 2 ER - TY - CHAP T1 - Korkeakoulumatematiikka teekkarin kompastuskivenä? AU - Silius, Kirsi AU - Pohjolainen, Seppo AU - Miilumäki, Thumas AU - Kangas, Jussi AU - Joutsenlahti, Jorma N1 - Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Chapter SN - 978-951-44-8610-4 SP - 242 EP - 265 BT - Korkeajännityksiä - kohti osallisuutta luovaa korkeakoulutusta A2 - Mäkinen, Marita A2 - Korhonen, Vesa A2 - Annala, Johanna A2 - Kalli, Pekka A2 - Svärd, Päivi A2 - Värri, Veli-Matti PB - Tampere University Press CY - Tampere ER - TY - BOOK T1 - Learner Control and Responsibility: Expanding the Concept of Self-direction in Hihger Education AU - Väljataga, Terje N1 - Awarding institution:Tampere University of Technology PY - 2011 Y1 - 2011 M3 - Doctoral thesis SN - 978-952-15-2512-4 T3 - Tampere University of Technology. Publication BT - Learner Control and Responsibility: Expanding the Concept of Self-direction in Hihger Education PB - Tampere University of Technology CY - Tampere ER - TY - GEN T1 - Linear Equation Solvers: Comparison of LU Decomposition and a Robust ODE Solver AU - Pohjolainen, Seppo AU - Nortunen, Hari N1 - ei ut-numeroa 3.5.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution SN - 978-951-39-4331-8 T3 - CAO ECCOMAS Thematic Conference on Computational Analysis and Optimization SP - 77 EP - 80 BT - Proceedings of CAO2011 ECCOMAS Thematic Conference on Computational Analysis and Optimization, Jyväskylä, Finland, 9.6.-11.6.2011. Reports of the Department of Mathematical Information Technology. Series A Collections A2 - Repin, Sergey A2 - Tiihonen, Timo A2 - Tuovinen, Tero PB - University of Jyväskylä CY - Jyväskylä ER - TY - JOUR T1 - Maaliskuun puheenaihe: Mielenkiintoista matematiikkaa opetukseen LUMA-sanomat AU - Eriksson, Sirkka-Liisa N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Article SP - 1 EP - 3 JO - LUMA-sanomat JF - LUMA-sanomat SN - 1799-3385 IS - Maaliskuu ER - TY - CHAP T1 - Matematiikkaklinikka AU - Kangas, Jussi N1 - Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Chapter SN - 978-952-60-4185-8 SP - 56 EP - 60 BT - Oppaiden opas - vinkkejä opetukseen opintopolun eri vaiheissa. Aalto-yliopiston julkaisusarja Tiede + Teknologia A2 - Myller, Eeva PB - Aalto-yliopisto CY - Helsinki ER - TY - GEN T1 - Math-Bridge - Eurooppalainen silta lukio- ja korkeakoulumatematiikan välille AU - Miilumäki, Thumas AU - Pohjolainen, Seppo AU - Silius, Kirsi AU - Nykänen, Ossi AU - Kangas, Jussi N1 - Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution T3 - ITK Interaktiivinen Tekniikka Koulutuksessa -konferenssi SP - 70 EP - 71 BT - ITK 2011, Interaktiivinen Tekniikka Koulutuksessa -konferenssi 2011 - Uutuuden viehätystä, ideoiden kierrätystä, Hämeenlinna, 6.-8.4.2011. Hämeen kesäyliopiston julkaisuja. Sarja B A2 - Leinamo, Sanna A2 - Salo, Hanna PB - Hämeen kesäyliopisto CY - Hämeenlinna ER - TY - GEN T1 - Mean value properties for K-hypermonogenic functions AU - Eriksson, Sirkka-Liisa AU - Orelma, Heikki N1 - ei ut-numeroa 1.3.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution T3 - International Conference on Clifford Algebras and their Applications in Mathematical Physics SP - 1 EP - 11 BT - 9th International Conference on Clifford Algebras and their Applications in Mathematical Physics 15 - 20 July 2011, Weimar, Germany A2 - Gurlebeck, K. PB - ICCA9 CY - Weimar ER - TY - CHAP T1 - Miten opiskella matematiikkaa yliopistossa - opas opiskelijoille AU - Kailanto, Meri N1 - Contribution: organisation=mat hyplab,FACT1=1 PY - 2011 Y1 - 2011 M3 - Chapter SN - 978-952-60-4185-8 SP - 53 EP - 55 BT - Oppaiden opas - vinkkejä opetukseen opintopolun eri vaiheissa. Aalto-yliopiston julkaisusarja Tiede + Teknologia A2 - Myller, Eeva PB - Aalto-yliopisto CY - Helsinki ER - TY - JOUR T1 - Mixture surrogate models based on Dempster-Shafer theory for global optimization problems AU - Muller, Juliane AU - Piche, Robert N1 - Online first

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 N2 - Recent research in algorithms for solving global optimization problems using response surface methodology has shown that it is in general not possible to use one surrogate model for solving different kinds of problems. In this paper the approach of applying Dempster-Shafer theory to surrogate model selection and their combination is described. Various conflict redistribution rules have been examined with respect to their influence on the results. Furthermore, the implications of the surrogate model type, i.e. using combined, single or a hybrid of both, have been studied. The suggested algorithms were applied to several well-known global optimization test problems. The results indicate that the used approach leads for all problems to a thorough exploration of the variable domain, i.e. the vicinities of global optima could be detected, and that the global minima could in most cases be approximated with high accuracy. AB - Recent research in algorithms for solving global optimization problems using response surface methodology has shown that it is in general not possible to use one surrogate model for solving different kinds of problems. In this paper the approach of applying Dempster-Shafer theory to surrogate model selection and their combination is described. Various conflict redistribution rules have been examined with respect to their influence on the results. Furthermore, the implications of the surrogate model type, i.e. using combined, single or a hybrid of both, have been studied. The suggested algorithms were applied to several well-known global optimization test problems. The results indicate that the used approach leads for all problems to a thorough exploration of the variable domain, i.e. the vicinities of global optima could be detected, and that the global minima could in most cases be approximated with high accuracy. U2 - 10.1007/s10898-010-9620-y DO - 10.1007/s10898-010-9620-y M3 - Article VL - 51 SP - 79 EP - 104 JO - Journal of Global Optimization JF - Journal of Global Optimization SN - 0925-5001 IS - 1 ER - TY - CHAP T1 - Mobile Tracking in Mixed Line-ofsight/Non-line-of-sight Conditions: Algorithms and Theoretical Lower Bound. Chapter 21 AU - Liang, Chen AU - Ali-Löytty, Simo AU - Piche, Robert AU - Lenan, Wu N1 - ei ut-numeroa 5.4.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Chapter SN - 978-0-470-94342-7 SP - 685 EP - 708 BT - Handbook of Position Location: Theory, Practice and Advances A2 - Zekavat, Reza A2 - Buehrer, R. Michael PB - WILEY-IEEE PRESS CY - Hoboken, NJ ER - TY - JOUR T1 - Modeling of Neuronal Growth In Vitro: Comparison of Simulation Tools NETMORPH and CX3D AU - Acimovic, Jugoslava AU - Mäki-Marttunen, Tuomo AU - Havela, Riikka AU - Teppola, Heidi AU - Linne, Marja-Leena N1 - ei ut-numeroa 12.10.2013

Contribution: organisation=sgn,FACT1=0.9

Contribution: organisation=mat,FACT2=0.1 PY - 2011 Y1 - 2011 N2 - We simulate the growth of neuronal networks using the two recently published tools, NETMORPH and CX3D. The goals of the work are (1) to examine and compare the simulation tools, (2) to construct a model of growth of neocortical cultures, and (3) to characterize the changes in network connectivity during growth, using standard graph theoretic methods. Parameters for the neocortical culture are chosen after consulting both the experimental and the computational work presented in the literature. The first (three) weeks in culture are known to be a time of development of extensive dendritic and axonal arbors and establishment of synaptic connections between the neurons. We simulate the growth of networks from day 1 to day 21. It is shown that for the properly selected parameters, the simulators can reproduce the experimentally obtained connectivity. The selected graph theoretic methods can capture the structural changes during growth. AB - We simulate the growth of neuronal networks using the two recently published tools, NETMORPH and CX3D. The goals of the work are (1) to examine and compare the simulation tools, (2) to construct a model of growth of neocortical cultures, and (3) to characterize the changes in network connectivity during growth, using standard graph theoretic methods. Parameters for the neocortical culture are chosen after consulting both the experimental and the computational work presented in the literature. The first (three) weeks in culture are known to be a time of development of extensive dendritic and axonal arbors and establishment of synaptic connections between the neurons. We simulate the growth of networks from day 1 to day 21. It is shown that for the properly selected parameters, the simulators can reproduce the experimentally obtained connectivity. The selected graph theoretic methods can capture the structural changes during growth. U2 - 10.1155/2011/616382 DO - 10.1155/2011/616382 M3 - Article VL - 2011 SP - 1 EP - 13 JO - Eurasip Journal on Bioinformatics and Systems Biology JF - Eurasip Journal on Bioinformatics and Systems Biology SN - 1687-4145 M1 - 616382 ER - TY - JOUR T1 - Modifications of the 85/85 test and the temperature cycling test for tantalum capacitors AU - Virkki, Johanna AU - Sydänheimo, Lauri AU - Raumonen, Pasi N1 - Tulospisteet 90 % ELE / 10 % MAT

Contribution: organisation=ele,FACT1=0.9

Contribution: organisation=mat,FACT2=0.1 PY - 2011 Y1 - 2011 U2 - 10.1108/09540911111146926 DO - 10.1108/09540911111146926 M3 - Article VL - 23 SP - 168 EP - 176 JO - Soldering and Surface Mount Technology JF - Soldering and Surface Mount Technology SN - 0954-0911 IS - 3 ER - TY - GEN T1 - Motivating the Mathematics Studies by Real-life Examples of Signal Processing and Communications Engineering AU - Huttunen, Heikki AU - Valkama, Mikko AU - Talvitie, Jukka AU - Laaksonen, Merja N1 - Contribution: organisation=sgn,FACT1=0.34

Contribution: organisation=tlt,FACT2=0.33

Contribution: organisation=mat,FACT3=0.33 PY - 2011 Y1 - 2011 U2 - 10.1109/DSP-SPE.2011.5739213 DO - 10.1109/DSP-SPE.2011.5739213 M3 - Conference contribution SN - 978-1-61284-226-4 T3 - IEEE Digital Signal Processing Workshop and IEEE Signal Processing Education Workshop DSP/SPE SP - 1 EP - 6 BT - 2011 IEEE Digital Signal Processing Workshop and IEEE Signal Processing Education Workshop (DSP/SPE), Sedona, USA, 4-7 January 2011 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR T1 - Multimodal inverse problems: maximum compatibility estimate and shape reconstruction AU - Kaasalainen, Mikko N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 U2 - 10.3934/ipi.2011.5.37 DO - 10.3934/ipi.2011.5.37 M3 - Article VL - 5 SP - 37 EP - 57 JO - Inverse Problems and Imaging JF - Inverse Problems and Imaging SN - 1930-8337 IS - 1 ER - TY - GEN T1 - Non-classical Logics with Real Life Applications AU - Turunen, Esko N1 - First published 2011

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Conference contribution SN - 978-81-8387-417-5 T3 - International Conference of Rough Sets, Fuzzy Setsand Soft Computing ICRSFSSC SP - 171 EP - 178 BT - Proceedings of International Conference of Rough Sets, Fuzzy Sets and Soft Computing ICRSFSSC-2009, November 5-7 2009, Tripura University PB - Serial Publications CY - New Delhi ER - TY - JOUR T1 - On Fractional Ornstein-Uhlenbeck Process AU - Kaarakka, Terhi AU - Salminen, Paavo N1 - ei ut-numeroa 22.3.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Article VL - 5 SP - 121 EP - 133 JO - Communications on Stochastic Analysis JF - Communications on Stochastic Analysis SN - 0973-9599 IS - 1 ER - TY - JOUR T1 - On the distribution of coefficients of powers of positive polynomials AU - Major, Lazlo N1 - ei ut-numeroa 5.4.2014

Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 M3 - Article VL - 49 SP - 239 EP - 243 JO - Australasian Journal of Combinatorics JF - Australasian Journal of Combinatorics SN - 1034-4942 ER - TY - JOUR T1 - Perturbation of strongly and polynomially stable Riesz-spectral operators AU - Paunonen, Lassi N1 - Contribution: organisation=mat,FACT1=1 PY - 2011 Y1 - 2011 N2 - In this paper we consider bounded and relatively bounded finite rank perturbations of a Riesz-spectral operator generating a polynomially stable semigroup of linear operators on a Hilbert space. We concentrate on a commonly encountered situation where the spectrum of the unperturbed operator is contained in the open left half-plane of the complex plane and approaches the imaginary axis asymptotically. We present conditions on the perturbing operator such that the spectrum of the perturbed operator is contained in the open left half-plane of the complex plane and additional conditions for the strong and polynomial stabilities of the perturbed semigroup. We consider two applications of the perturbation results. In the first example we apply the results to the perturbation of a polynomially stabilized one-dimensional wave equation. In the second example we consider perturbation of a closed-loop system consisting of a distributed parameter system and an observer-based feedback controller solving the robust output regulation problem related to an infinite-dimensional signal generator. AB - In this paper we consider bounded and relatively bounded finite rank perturbations of a Riesz-spectral operator generating a polynomially stable semigroup of linear operators on a Hilbert space. We concentrate on a commonly encountered situation where the spectrum of the unperturbed operator is contained in the open left half-plane of the complex plane and approaches the imaginary axis asymptotically. We present conditions on the perturbing operator such that the spectrum of the perturbed operator is contained in the open left half-plane of the complex plane and additional conditions for the strong and polynomial stabilities of the perturbed semigroup. We consider two applications of the perturbation results. In the first example we apply the results to the perturbation of a polynomially stabilized one-dimensional wave equation. In the second example we consider perturbation of a closed-loop system consisting of a distributed parameter system and an observer-based feedback controller solving the robust output regulation problem related to an infinite-dimensional signal generator. U2 - 10.1016/j.sysconle.2011.01.005 DO - 10.1016/j.sysconle.2011.01.005 M3 - Article VL - 60 SP - 234 EP - 248 JO - Systems and Control Letters JF - Systems and Control Letters SN - 0167-6911 IS - 4 ER -