@book{6931, author = {{Krauter, Stefan}}, publisher = {{Springer Verlag}}, title = {{{Solar Electric Power Systems. Second Edition}}}, year = {{2014}}, } @inproceedings{6932, author = {{Krauter, Stefan}}, booktitle = {{Proceedings of the 6th World Conference of Photovoltaic Energy Conversion WCPEC 6, Kyoto (Japan), November 23-27, 2014 }}, title = {{{Measures to match load profile with actual PV generation to achieve an effective integration into the energy system}}}, year = {{2014}}, } @inproceedings{6933, author = {{Krauter, Stefan}}, booktitle = {{Proceedings of the 6th World Conference of Photovoltaic Energy Conversion WCPEC 6, Kyoto (Japan), November 23-27, 2014}}, title = {{{Identification and elimination of potential induced degradation (PID) at photovoltaic power plants}}}, year = {{2014}}, } @inproceedings{6934, author = {{Krauter, Stefan and Bendfeld, Jörg and Gohardehi, A. and Sadati, A.}}, booktitle = {{Proceedings of the 6th World Conference of Photovoltaic Energy Conversion WCPEC 6, Kyoto (Japan), November 23-27, 2014}}, title = {{{Performance and Yield Comparison of seven different Micro-Inverters.}}}, year = {{2014}}, } @inproceedings{6935, author = {{Krauter, Stefan and Bouyraaman, Yassin and Bendfeld, Jörg and Japs, Ewald}}, booktitle = {{Proceedings of the 6th World Conference of Photovoltaic Energy Conversion WCPEC 6, Kyoto (Japan), November 23-27, 2014}}, title = {{{Micro combined heat and power plants (micro-CHP) in combination with photovoltaics for autonomous local power and heat supply.}}}, year = {{2014}}, } @inproceedings{6936, author = {{Krauter, Stefan}}, booktitle = {{Proceedings of the World Renewable Energy Congress WREC XIII, London, (UK), August 3-8, 2014 }}, title = {{{Photovoltaics and the Energy System: Adaptation of layout and load}}}, year = {{2014}}, } @inproceedings{6937, author = {{Ameli, Ali and Ameli, H. and Krauter, Stefan and Hanitsch, Rolf}}, booktitle = {{Proceedings of the MES-BREG 2014 Symposium “Innovating Energy Access for Remote Areas: Discovering untapped resources”, UC Berkeley (USA), April 10-12, 2014 }}, title = {{{An Optimized Load Frequency Control of a De-centralized Energy System Using Plug-in Electric Vehicles}}}, year = {{2014}}, } @inproceedings{6938, author = {{Japs, Ewald and Peters, S. and Sonnenrein, Gerrit and Krauter, Stefan}}, booktitle = {{Proceedings of the 40th IEEE Photovoltaic Specialists Conference, Denver (USA), June 8-13, 2014 }}, title = {{{Energy-economic comparison of photovoltaic modules equipped with a layer of conventional and improved phase-change material}}}, year = {{2014}}, } @inproceedings{6939, author = {{Krauter, Stefan and Japs, Ewald}}, booktitle = {{Proceedings of the 40th IEEE Photovoltaic Specialists Conference, Denver (USA), June 8-13, 2014}}, title = {{{Integration of PV into the Energy System: Challenges and Measures for Generation and Load Management}}}, year = {{2014}}, } @inproceedings{6940, author = {{Krauter, Stefan}}, booktitle = {{Proceedings of the 29th European Photovoltaic Solar Energy Conference and Exhibition, Amsterdam (The Netherlands), September 22-16, 2014 }}, title = {{{Plant layout modifications and load adaptation to integrate Photovoltaics in the energy system.}}}, year = {{2014}}, } @article{6942, author = {{Krauter, Stefan}}, issn = {{0943-3481}}, journal = {{uwf Umwelt Wirtschafts Forum}}, number = {{1}}, pages = {{S. 37--44}}, title = {{{Integration Erneuerbarer Energien: Herausforderungen und Maßnahmen im Erzeugungssektor und Lastmanagement}}}, volume = {{22}}, year = {{2014}}, } @inproceedings{1647, author = {{Dräxler, Martin and Karl, Holger}}, booktitle = {{Proceedings of 20th European Wireless Conference }}, title = {{{Feasibility of Base Station Coordination and Dynamic Backhaul Network Configuration in Backhaul Networks with Limited Capacity}}}, year = {{2014}}, } @inproceedings{1654, author = {{Herlich, Matthias and Karl, Holger}}, booktitle = {{12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) 2014}}, isbn = {{9783901882630}}, publisher = {{IEEE}}, title = {{{Analytic quantification of outage probability and radiated power of cooperative base stations}}}, doi = {{10.1109/wiopt.2014.6850365}}, year = {{2014}}, } @inbook{16577, author = {{Dellnitz, Michael and Dumitrescu, Roman and Flaßkamp, Kathrin and Gausemeier, Jürgen and Hartmann, Philip and Iwanek, Peter and Korf, Sebastian and Krüger, Martin and Ober-Blöbaum, Sina and Porrmann, Mario and Priesterjahn, Claudia and Stahl, Katharina and Trächtler, Ansgar and Vaßholz, Mareen}}, booktitle = {{Lecture Notes in Mechanical Engineering}}, isbn = {{9783642454349}}, issn = {{2195-4356}}, title = {{{The Paradigm of Self-optimization}}}, doi = {{10.1007/978-3-642-45435-6_1}}, year = {{2014}}, } @inproceedings{16596, author = {{Flasskamp, Kathrin and Ober-Blobaum, Sina and Schneider, Tobias and Bocker, Joachim}}, booktitle = {{52nd IEEE Conference on Decision and Control}}, isbn = {{9781467357173}}, title = {{{Optimal control of a switched reluctance drive by a direct method using a discrete variational principle}}}, doi = {{10.1109/cdc.2013.6761075}}, year = {{2014}}, } @article{16597, author = {{Flaßkamp, Kathrin and Timmermann, Julia and Ober-Blöbaum, Sina and Trächtler, Ansgar}}, issn = {{0020-7179}}, journal = {{International Journal of Control}}, pages = {{1886--1905}}, title = {{{Control strategies on stable manifolds for energy-efficient swing-ups of double pendula}}}, doi = {{10.1080/00207179.2014.893450}}, year = {{2014}}, } @inbook{16679, author = {{Anacker, Harald and Dellnitz, Michael and Flaßkamp, Kathrin and Groesbrink, Stefan and Hartmann, Philip and Heinzemann, Christian and Horenkamp, Christian and Kleinjohann, Bernd and Kleinjohann, Lisa and Korf, Sebastian and Krüger, Martin and Müller, Wolfgang and Ober-Blöbaum, Sina and Oberthür, Simon and Porrmann, Mario and Priesterjahn, Claudia and Radkowski, Rafael and Rasche, Christoph and Rieke, Jan and Ringkamp, Maik and Stahl, Katharina and Steenken, Dominik and Stöcklein, Jörg and Timmermann, Robert and Trächtler, Ansgar and Witting, Katrin and Xie, Tao and Ziegert, Steffen}}, booktitle = {{Lecture Notes in Mechanical Engineering}}, isbn = {{9783642454349}}, issn = {{2195-4356}}, title = {{{Methods for the Design and Development}}}, doi = {{10.1007/978-3-642-45435-6_5}}, year = {{2014}}, } @inproceedings{16760, author = {{Arens, S. and Domik, Gitta and Weise, R. and Holzinger, J. and Burchert, W.}}, location = {{Hannover}}, title = {{{Optimierte 3D Morphologiedarstellung tomographischer Datensätze des Herzens}}}, year = {{2014}}, } @article{1679, author = {{Krimphove, Dieter}}, journal = {{Betriebs-Berater }}, number = {{Heft 10}}, pages = {{564 ff.}}, title = {{{Das Praktikum – Rechte und Pflichten eines arbeitsrechtlichen Rechtsverhältnisses}}}, year = {{2014}}, } @article{1680, author = {{Krimphove, Dieter}}, journal = {{EuZW}}, number = {{5, 25. Jahrg.}}, pages = {{178 ff.}}, title = {{{Neues zur Geltung nicht umgesetzter europäischer Richtlinien}}}, year = {{2014}}, } @article{1681, author = {{Krimphove, Dieter and Lüke, Christoph}}, journal = {{Betriebs-Berater }}, number = {{Heft 35}}, pages = {{2106 ff.}}, title = {{{Rechtsfragen der Rekrutierung ausländischen Personals}}}, year = {{2014}}, } @book{16870, editor = {{Flocchini, Paola and Gao, Jie and Kranakis, Evangelos and Meyer auf der Heide, Friedhelm}}, isbn = {{9783642453458}}, issn = {{0302-9743}}, publisher = {{Springer}}, title = {{{Algorithms for Sensor Systems - 9th International Symposium on Algorithms and Experiments for Sensor Systems, Wireless Networks and Distributed Robotics, {ALGOSENSORS} 2013}}}, doi = {{10.1007/978-3-642-45346-5}}, volume = {{8243}}, year = {{2014}}, } @article{1702, author = {{Chen, Shumei and Li, Guixin and Zeuner, Franziska and Wong, Wing Han and Pun, Edwin Yue Bun and Zentgraf, Thomas and Cheah, Kok Wai and Zhang, Shuang}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Symmetry-Selective Third-Harmonic Generation from Plasmonic Metacrystals}}}, doi = {{10.1103/physrevlett.113.033901}}, volume = {{113}}, year = {{2014}}, } @article{1703, author = {{Zentgraf, Thomas}}, issn = {{0031-9252}}, journal = {{Physik in unserer Zeit}}, number = {{2}}, pages = {{58--59}}, publisher = {{Wiley-Blackwell}}, title = {{{Hochauflösende Holografie}}}, doi = {{10.1002/piuz.201490026}}, volume = {{45}}, year = {{2014}}, } @article{17043, author = {{Baier, Robert and Dellnitz, Michael and Hessel-von Molo, Mirko and Sertl, Stefan and Kevrekidis, Ioannis G.}}, journal = {{Journal of Computational Dynamics}}, number = {{1}}, pages = {{39--69}}, title = {{{The computation of convex invariant sets via Newton's method}}}, doi = {{10.3934/jcd.2014.1.39}}, volume = {{1}}, year = {{2014}}, } @inbook{17044, author = {{Leitz, Thomas and Ober-Blöbaum, Sina and Leyendecker, Sigrid}}, booktitle = {{Multibody Dynamics}}, editor = {{Terze, Zdravko}}, isbn = {{9783319072593}}, issn = {{1871-3033}}, publisher = {{Springer}}, title = {{{Variational Lie Group Formulation of Geometrically Exact Beam Dynamics: Synchronous and Asynchronous Integration}}}, doi = {{10.1007/978-3-319-07260-9}}, year = {{2014}}, } @inproceedings{17045, author = {{Gail, Tobias and Leyendecker, Sigrid and Ober-Blöbaum, Sina}}, booktitle = {{The 3rdJoint International Conference on Multibody System Dynamics}}, title = {{{On the role of quadrature rules and system dimensions in variational multirateintegrators}}}, year = {{2014}}, } @inproceedings{17046, author = {{Ober-Blöbaum, Sina and Lindhorst, Henning}}, booktitle = {{21st International Symposium on Mathematical Theory of Networks and Systems}}, title = {{{Variational formulation and structure-preserving discretization ofnonlinear electric circuits}}}, year = {{2014}}, } @article{17107, author = {{Kohlborn, Thomas and Müller, Oliver and Poeppelbuss, Jens and Roeglinger, Maximilian}}, issn = {{1463-7154}}, journal = {{Business Process Management Journal}}, pages = {{634--638}}, publisher = {{Emerald Group Publishing Limited}}, title = {{{Interview with Michael Rosemann on ambidextrous business process management}}}, doi = {{10.1108/bpmj-02-2014-0012}}, year = {{2014}}, } @inbook{17109, author = {{Raffl, Celina and Lucke, Jörn and Müller, Oliver and Zimmermann, Hans-Dieter and Vom Brocke, Jan}}, booktitle = {{TOGI-Schriftenreihe}}, publisher = {{ePubli GmbH}}, title = {{{Handbuch für offene gesellschaftliche Innovation}}}, volume = {{11}}, year = {{2014}}, } @inproceedings{17116, author = {{Herbst, Andrea and Simons, Alexander and vom Brocke, Jan and Müller, Oliver and Debortoli, Stefan and Vakulenko, Svitlana}}, booktitle = {{European Conference on Information Systems}}, title = {{{Identifying and characterizing topics in enterprise content management: a latent semantic analysis of vendor case studies}}}, year = {{2014}}, } @inproceedings{17117, author = {{Reuter, Nadine and Vakulenko, Svitlana and vom Brocke, Jan and Debortoli, Stefan and Müller, Oliver}}, booktitle = {{European Conference on Information Systems}}, title = {{{Identifying the role of information systems in achieving energy-related environmental sustainability using text mining}}}, year = {{2014}}, } @article{17118, author = {{vom Brocke, Jan and Debortoli, Stefan and Müller, Oliver and Reuter, Nadine}}, issn = {{1529-3181}}, journal = {{Communications of the Association for Information Systems}}, number = {{1}}, pages = {{7}}, title = {{{How In-memory Technology Can Create Business Value: Insights from the Hilti Case}}}, doi = {{10.17705/1cais.03407}}, volume = {{34}}, year = {{2014}}, } @article{10602, author = {{Schaefers, Lars and Platzner, Marco}}, journal = {{IEEE Transactions on Computational Intelligence and AI in Games}}, number = {{3}}, pages = {{361--374}}, title = {{{A Novel Technique and its Application to Computer Go}}}, doi = {{10.1109/TCIAIG.2014.2346997}}, volume = {{6}}, year = {{2014}}, } @article{10603, author = {{Giefers, Heiner and Platzner, Marco}}, journal = {{IEEE Transactions on Computers}}, number = {{12}}, pages = {{2919 -- 2932}}, title = {{{An FPGA-based Reconfigurable Mesh Many-Core}}}, doi = {{10.1109/TC.2013.174}}, volume = {{63}}, year = {{2014}}, } @inproceedings{10621, author = {{Anwer, Jahanzeb and Platzner, Marco and Meisner, Sebastian}}, booktitle = {{Reconfigurable Architectures Workshop (RAW)}}, title = {{{FPGA Redundancy Configurations: An Automated Design Space Exploration}}}, doi = {{10.1109/IPDPSW.2014.37}}, year = {{2014}}, } @misc{10627, author = {{Bockhorn, Arne}}, publisher = {{Paderborn University}}, title = {{{Echtzeit Klassifikation von sEMG Signalen mit einem low-cost DSP Evaluation Board}}}, year = {{2014}}, } @inproceedings{10632, author = {{Boschmann, Alexander and Platzner, Marco}}, booktitle = {{Proc. MyoElectric Controls Symposium (MEC)}}, title = {{{A computer vision-based approach to high density EMG pattern recognition using structural similarity}}}, year = {{2014}}, } @inproceedings{10633, author = {{Boschmann, Alexander and Platzner, Marco}}, booktitle = {{Proc. IEEE Int. Conf. Eng. Med. Biolog. (EMBC)}}, title = {{{Towards robust HD EMG pattern recognition: Reducing electrode displacement effect using structural similarity}}}, year = {{2014}}, } @misc{10640, author = {{Brand, Marcel}}, publisher = {{Paderborn University}}, title = {{{A Generalized Loop Accelerator Implemented as a Coarse-Grained Array}}}, year = {{2014}}, } @misc{10645, author = {{Damschen, Marvin}}, publisher = {{Paderborn University}}, title = {{{Easy-to-use-on-the-fly binary program acceleration on many-cores}}}, year = {{2014}}, } @inproceedings{10654, author = {{Glette, Kyrre and Kaufmann, Paul}}, booktitle = {{IEEE Congress on Evolutionary Computation (CEC)}}, title = {{{Lookup Table Partial Reconfiguration for an Evolvable Hardware Classifier System}}}, year = {{2014}}, } @misc{10665, author = {{Hagedorn, Christoph}}, publisher = {{Paderborn University}}, title = {{{Entwicklung einer codegrößenoptimierten Softwarebibliothek für 8-Bit Mikrocontroller in netzunabhängigen Notleuchten}}}, year = {{2014}}, } @inproceedings{10674, author = {{Ho, Nam and Kaufmann, Paul and Platzner, Marco}}, booktitle = {{24th Intl. Conf. on Field Programmable Logic and Applications (FPL)}}, keywords = {{Linux, hardware-software codesign, multiprocessing systems, parallel processing, LEON3 multicore platform, Linux kernel, PMU, hardware counters, hardware-software infrastructure, high performance embedded computing, perf_event, performance monitoring unit, Computer architecture, Hardware, Monitoring, Phasor measurement units, Radiation detectors, Registers, Software}}, pages = {{1--4}}, title = {{{A hardware/software infrastructure for performance monitoring on LEON3 multicore platforms}}}, doi = {{10.1109/FPL.2014.6927437}}, year = {{2014}}, } @inproceedings{10677, author = {{Ho, Nam and Kaufmann, Paul and Platzner, Marco}}, booktitle = {{2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)}}, keywords = {{Linux, cache storage, embedded systems, granular computing, multiprocessing systems, reconfigurable architectures, Leon3 SPARe processor, custom logic events, evolvable-self-adaptable processor cache, fine granular profiling, integer unit events, measurement infrastructure, microarchitectural events, multicore embedded system, perf_event standard Linux performance measurement interface, processor properties, run-time reconfigurable memory-to-cache address mapping engine, run-time reconfigurable multicore infrastructure, split-level caching, Field programmable gate arrays, Frequency locked loops, Irrigation, Phasor measurement units, Registers, Weaving}}, pages = {{31--37}}, title = {{{Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure}}}, doi = {{10.1109/ICES.2014.7008719}}, year = {{2014}}, } @misc{10679, author = {{König, Fabian}}, publisher = {{Paderborn University}}, title = {{{EMG-basierte simultane und proportionale Online-Steuerung einer virtuellen Prothese}}}, year = {{2014}}, } @misc{10701, author = {{Koch, Benjamin}}, publisher = {{Paderborn University}}, title = {{{Hardware Acceleration of Mechatronic Controllers on a Zynq Platform FPGA}}}, year = {{2014}}, } @misc{10715, author = {{Mittendorf, Robert}}, publisher = {{Paderborn University}}, title = {{{Advanced AES-key recovery from decayed RAM using multi-threading and FPGAs}}}, year = {{2014}}, } @misc{10732, author = {{Rüthing, Christoph}}, publisher = {{Paderborn University}}, title = {{{The Xilinx Zynq Architecture as a Platform for Reconfigurable Heterogeneous Multi-Cores}}}, year = {{2014}}, } @phdthesis{10733, abstract = {{Monte-Carlo Tree Search (MCTS) is a class of simulation-based search algorithms. It brought about great success in the past few years regarding the evaluation of deterministic two-player games such as the Asian board game Go. In this thesis, we present a parallelization of the most popular MCTS variant for large HPC compute clusters that efficiently shares a single game tree representation in a distributed memory environment and scales up to 128 compute nodes and 2048 cores. It is hereby one of the most powerful MCTS parallelizations to date. In order to measure the impact of our parallelization on the search quality and remain comparable to the most advanced MCTS implementations to date, we implemented it in a state-of-the-art Go engine Gomorra, making it competitive with the strongest Go programs in the world. We further present an empirical comparison of different Bayesian ranking systems when being used for predicting expert moves for the game of Go and introduce a novel technique for automated detection and analysis of evaluation uncertainties that show up during MCTS searches.}}, author = {{Schäfers, Lars}}, isbn = {{978-3-8325-3748-7}}, pages = {{133}}, publisher = {{Logos Verlag Berlin GmbH}}, title = {{{Parallel Monte-Carlo Tree Search for HPC Systems and its Application to Computer Go}}}, year = {{2014}}, } @inproceedings{10738, author = {{Shen, Cong and Kaufmann, Paul and Braun, Martin}}, booktitle = {{IEEE Power and Energy Society General Meeting (IEEE GM)}}, title = {{{Optimizing the Generator Start-up Sequence After a Power System Blackout}}}, year = {{2014}}, } @inproceedings{10739, author = {{Shen, Cong and Kaufmann, Paul and Braun, Martin}}, booktitle = {{Power Systems Computation Conference (PSCC)}}, publisher = {{IEEE}}, title = {{{A New Distribution Network Reconfiguration and Restoration Path Selection Algorithm}}}, year = {{2014}}, } @misc{10744, author = {{Surmund, Sebastian}}, publisher = {{Paderborn University}}, title = {{{Multithreaded Parallelization of Mechatronic Controllers on a Zynq Platform FPGA}}}, year = {{2014}}, } @book{10756, author = {{I. Esparcia-Alc{\'a}zar, Anna and Eiben, A.E. and Agapitos, Alexandros and Sim{\~o}es, Anabela and G.B. Tettamanzi, Andrea and Della Cioppa, Antonio and M. Mora, Antonio and Cotta, Carlos and Tarantino, Ernesto and Haasdijk, Evert and Divina, Federico and Fern{\'a}ndez de Vega, Francisco and Squillero, Giovanni and De Falco, Ivanoe and Ignacio Hidalgo, J. and Sim, Kevin and Glette, Kyrre and Zhang, Mengjie and Urquhart, Neil and Burelli, Paolo and Kaufmann, Paul and Po{\v s}{\'\i}k, Petr and Schaefer, Robert and Drechsler, Rolf and Antipolis, Sophia and Cagnoni, Stefano and Thanh Nguyen, Trung and S. Bush (editors), William}}, publisher = {{Springer}}, title = {{{Applications of Evolutionary Computation - 17th European Conference, EvoApplications}}}, volume = {{8602}}, year = {{2014}}, } @inproceedings{10764, author = {{Anwer, Jahanzeb and Platzner, Marco}}, booktitle = {{IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems (DFT)}}, pages = {{177--184}}, publisher = {{IEEE}}, title = {{{Analytic reliability evaluation for fault-tolerant circuit structures on FPGAs}}}, doi = {{10.1109/DFT.2014.6962108}}, year = {{2014}}, } @inproceedings{10773, author = {{Ghasemzadeh Mohammadi, Hassan and Gaillardon, Pierre-Emmanuel and Yazdani, Majid and De Micheli, Giovanni}}, booktitle = {{2014 IEEE/ACM International Symposium on Nanoscale Architectures (NANOARCH)}}, pages = {{163--168}}, publisher = {{IEEE}}, title = {{{Fast process variation analysis in nano-scaled technologies using column-wise sparse parameter selection}}}, doi = {{10.1109/NANOARCH.2014.6880479}}, year = {{2014}}, } @article{10791, author = {{Trier, Matthias and Richter, Alexander}}, issn = {{1350-1917}}, journal = {{Information Systems Journal}}, pages = {{465--488}}, title = {{{The deep structure of organizational online networking - an actor-oriented case study}}}, doi = {{10.1111/isj.12047}}, year = {{2014}}, } @inproceedings{11746, abstract = {{ "A method for nonstationary noise robust automatic speech recognition (ASR) is to first estimate the changing noise statistics and second clean up the features prior to recognition accordingly. Here, the first is accomplished by noise tracking in the spectral domain, while the second relies on Bayesian enhancement in the feature domain. In this way we take advantage of our recently proposed maximum a-posteriori based (MAP-B) noise power spectral density estimation algorithm, which is able to estimate the noise statistics even in time-frequency bins dominated by speech. We show that MAP-B noise tracking leads to an improved noise model estimate in the feature domain compared to estimating noise in speech absence periods only, if the bias resulting from the nonlinear transformation from the spectral to the feature domain is accounted for. Consequently, ASR results are improved, as is shown by experiments conducted on the Aurora IV database." }}, author = {{Chinaev, Aleksej and Puels, Marc and Haeb-Umbach, Reinhold}}, booktitle = {{11. ITG Fachtagung Sprachkommunikation (ITG 2014)}}, title = {{{Spectral Noise Tracking for Improved Nonstationary Noise Robust ASR}}}, year = {{2014}}, } @inproceedings{11752, abstract = {{ "In this contribution we derive a variational EM (VEM) algorithm for model selection in complex Watson mixture models, which have been recently proposed as a model of the distribution of normalized microphone array signals in the short-time Fourier transform domain. The VEM algorithm is applied to count the number of active sources in a speech mixture by iteratively estimating the mode vectors of the Watson distributions and suppressing the signals from the corresponding directions. A key theoretical contribution is the derivation of the MMSE estimate of a quadratic form involving the mode vector of the Watson distribution. The experimental results demonstrate the effectiveness of the source counting approach at moderately low SNR. It is further shown that the VEM algorithm is more robust w.r.t. used threshold values." }}, author = {{Drude, Lukas and Chinaev, Aleksej and Tran Vu, Dang Hai and Haeb-Umbach, Reinhold}}, booktitle = {{39th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2014)}}, title = {{{Source Counting in Speech Mixtures Using a Variational EM Approach for Complexwatson Mixture Models}}}, year = {{2014}}, } @inproceedings{11753, abstract = {{This contribution describes a step-wise source counting algorithm to determine the number of speakers in an offline scenario. Each speaker is identified by a variational expectation maximization (VEM) algorithm for complex Watson mixture models and therefore directly yields beamforming vectors for a subsequent speech separation process. An observation selection criterion is proposed which improves the robustness of the source counting in noise. The algorithm is compared to an alternative VEM approach with Gaussian mixture models based on directions of arrival and shown to deliver improved source counting accuracy. The article concludes by extending the offline algorithm towards a low-latency online estimation of the number of active sources from the streaming input data.}}, author = {{Drude, Lukas and Chinaev, Aleksej and Tran Vu, Dang Hai and Haeb-Umbach, Reinhold}}, booktitle = {{14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)}}, keywords = {{Accuracy, Acoustics, Estimation, Mathematical model, Soruce separation, Speech, Vectors, Bayes methods, Blind source separation, Directional statistics, Number of speakers, Speaker diarization}}, pages = {{213--217}}, title = {{{Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models}}}, year = {{2014}}, } @inproceedings{11814, abstract = {{ "In this paper we present an algorithm for the unsupervised segmentation of a lattice produced by a phoneme recognizer into words. Using a lattice rather than a single phoneme string accounts for the uncertainty of the recognizer about the true label sequence. An example application is the discovery of lexical units from the output of an error-prone phoneme recognizer in a zero-resource setting, where neither the lexicon nor the language model (LM) is known. We propose a computationally efficient iterative approach, which alternates between the following two steps: First, the most probable string is extracted from the lattice using a phoneme LM learned on the segmentation result of the previous iteration. Second, word segmentation is performed on the extracted string using a word and phoneme LM which is learned alongside the new segmentation. We present results on lattices produced by a phoneme recognizer on the WSJCAM0 dataset. We show that our approach delivers superior segmentation performance than an earlier approach found in the literature, in particular for higher-order language models. " }}, author = {{Heymann, Jahn and Walter, Oliver and Haeb-Umbach, Reinhold and Raj, Bhiksha}}, booktitle = {{39th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2014)}}, title = {{{Iterative Bayesian Word Segmentation for Unspuervised Vocabulary Discovery from Phoneme Lattices}}}, year = {{2014}}, } @inproceedings{11831, abstract = {{ "Several self-localization algorithms have been proposed, that determine the positions of either acoustic or visual sensors autonomously. Usually these positions are given in a modality specific coordinate system, with an unknown rotation, translation and scale between the different systems. For a joint audiovisual tracking, where the different modalities support each other, the two modalities need to be mapped into a common coordinate system. In this paper we propose to estimate this mapping based on audiovisual correlates, i.e., a speaker that can be localized by both, a microphone and a camera network separately. The voice is tracked by a microphone network, which had to be calibrated by a self-localization algorithm at first, and the head is tracked by a calibrated camera network. Unlike existing Singular Value Decomposition based approaches to estimate the coordinate system mapping, we propose to perform an estimation in the shape domain, which turns out to be computationally more efficient. Simulations of the self-localization of an acoustic sensor network and a following coordinate mapping for a joint speaker localization showed a significant improvement of the localization performance, since the modalities were able to support each other." }}, author = {{Jacob, Florian and Haeb-Umbach, Reinhold}}, booktitle = {{11. ITG Fachtagung Sprachkommunikation (ITG 2014)}}, title = {{{Coordinate Mapping Between an Acoustic and Visual Sensor Network in the Shape Domain for a Joint Self-Calibrating Speaker Tracking}}}, year = {{2014}}, } @article{11861, abstract = {{In this contribution we present a theoretical and experimental investigation into the effects of reverberation and noise on features in the logarithmic mel power spectral domain, an intermediate stage in the computation of the mel frequency cepstral coefficients, prevalent in automatic speech recognition (ASR). Gaining insight into the complex interaction between clean speech, noise, and noisy reverberant speech features is essential for any ASR system to be robust against noise and reverberation present in distant microphone input signals. The findings are gathered in a probabilistic formulation of an observation model which may be used in model-based feature compensation schemes. The proposed observation model extends previous models in three major directions: First, the contribution of additive background noise to the observation error is explicitly taken into account. Second, an energy compensation constant is introduced which ensures an unbiased estimate of the reverberant speech features, and, third, a recursive variant of the observation model is developed resulting in reduced computational complexity when used in model-based feature compensation. The experimental section is used to evaluate the accuracy of the model and to describe how its parameters can be determined from test data.}}, author = {{Leutnant, Volker and Krueger, Alexander and Haeb-Umbach, Reinhold}}, issn = {{2329-9290}}, journal = {{IEEE/ACM Transactions on Audio, Speech, and Language Processing}}, keywords = {{computational complexity, reverberation, speech recognition, automatic speech recognition, background noise, clean speech, computational complexity, energy compensation, logarithmic mel power spectral domain, mel frequency cepstral coefficients, microphone input signals, model-based feature compensation schemes, noisy reverberant speech automatic recognition, noisy reverberant speech features, reverberation, Atmospheric modeling, Computational modeling, Noise, Noise measurement, Reverberation, Speech, Vectors, Model-based feature compensation, observation model for reverberant and noisy speech, recursive observation model, robust automatic speech recognition}}, number = {{1}}, pages = {{95--109}}, title = {{{A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech}}}, doi = {{10.1109/TASLP.2013.2285480}}, volume = {{22}}, year = {{2014}}, } @article{11867, abstract = {{New waves of consumer-centric applications, such as voice search and voice interaction with mobile devices and home entertainment systems, increasingly require automatic speech recognition (ASR) to be robust to the full range of real-world noise and other acoustic distorting conditions. Despite its practical importance, however, the inherent links between and distinctions among the myriad of methods for noise-robust ASR have yet to be carefully studied in order to advance the field further. To this end, it is critical to establish a solid, consistent, and common mathematical foundation for noise-robust ASR, which is lacking at present. This article is intended to fill this gap and to provide a thorough overview of modern noise-robust techniques for ASR developed over the past 30 years. We emphasize methods that are proven to be successful and that are likely to sustain or expand their future applicability. We distill key insights from our comprehensive overview in this field and take a fresh look at a few old problems, which nevertheless are still highly relevant today. Specifically, we have analyzed and categorized a wide range of noise-robust techniques using five different criteria: 1) feature-domain vs. model-domain processing, 2) the use of prior knowledge about the acoustic environment distortion, 3) the use of explicit environment-distortion models, 4) deterministic vs. uncertainty processing, and 5) the use of acoustic models trained jointly with the same feature enhancement or model adaptation process used in the testing stage. With this taxonomy-oriented review, we equip the reader with the insight to choose among techniques and with the awareness of the performance-complexity tradeoffs. The pros and cons of using different noise-robust ASR techniques in practical application scenarios are provided as a guide to interested practitioners. The current challenges and future research directions in this field is also carefully analyzed.}}, author = {{Li, Jinyu and Deng, Li and Gong, Yifan and Haeb-Umbach, Reinhold}}, journal = {{IEEE Transactions on Audio, Speech and Language Processing}}, keywords = {{Speech recognition, compensation, distortion modeling, joint model training, noise, robustness, uncertainty processing}}, number = {{4}}, pages = {{745--777}}, title = {{{An Overview of Noise-Robust Automatic Speech Recognition}}}, doi = {{10.1109/TASLP.2014.2304637}}, volume = {{22}}, year = {{2014}}, } @inproceedings{11918, abstract = {{In this paper, we investigate unsupervised acoustic model training approaches for dysarthric-speech recognition. These models are first, frame-based Gaussian posteriorgrams, obtained from Vector Quantization (VQ), second, so-called Acoustic Unit Descriptors (AUDs), which are hidden Markov models of phone-like units, that are trained in an unsupervised fashion, and, third, posteriorgrams computed on the AUDs. Experiments were carried out on a database collected from a home automation task and containing nine speakers, of which seven are considered to utter dysarthric speech. All unsupervised modeling approaches delivered significantly better recognition rates than a speaker-independent phoneme recognition baseline, showing the suitability of unsupervised acoustic model training for dysarthric speech. While the AUD models led to the most compact representation of an utterance for the subsequent semantic inference stage, posteriorgram-based representations resulted in higher recognition rates, with the Gaussian posteriorgram achieving the highest slot filling F-score of 97.02%. Index Terms: unsupervised learning, acoustic unit descriptors, dysarthric speech, non-negative matrix factorization}}, author = {{Walter, Oliver and Despotovic, Vladimir and Haeb-Umbach, Reinhold and Gemmeke, Jrt and Ons, Bart and Van hamme, Hugo}}, booktitle = {{INTERSPEECH 2014}}, title = {{{An Evaluation of Unsupervised Acoustic Model Training for a Dysarthric Speech Interface}}}, year = {{2014}}, } @inproceedings{11974, author = {{Berger, Mario and Erlacher, Felix and Sommer, Christoph and Dressler, Falko}}, booktitle = {{2014 International Conference on Computing, Networking and Communications (ICNC)}}, isbn = {{9781479923588}}, title = {{{Adaptive load allocation for combining Anomaly Detectors using controlled skips}}}, doi = {{10.1109/iccnc.2014.6785438}}, year = {{2014}}, } @inproceedings{11978, author = {{Bloessl, Bastian and Segata, Michele and Sommer, Christoph and Dressler, Falko}}, booktitle = {{2013 IEEE Vehicular Networking Conference}}, isbn = {{9781479926879}}, title = {{{Towards an Open Source IEEE 802.11p stack: A full SDR-based transceiver in GNU Radio}}}, doi = {{10.1109/vnc.2013.6737601}}, year = {{2014}}, } @inproceedings{11979, author = {{Bloessl, Bastian and Puschmann, Andre and Sommer, Christoph and Dressler, Falko}}, booktitle = {{Proceedings of the 9th ACM international workshop on Wireless network testbeds, experimental evaluation and characterization - WiNTECH '14}}, isbn = {{9781450330725}}, title = {{{Timings matter}}}, doi = {{10.1145/2643230.2643240}}, year = {{2014}}, } @inproceedings{11994, author = {{Dressler, Falko and Handle, Philipp and Sommer, Christoph}}, booktitle = {{Proceedings of the 2014 ACM international workshop on Wireless and mobile technologies for smart cities - WiMobCity '14}}, isbn = {{9781450330367}}, title = {{{Towards a vehicular cloud - using parked vehicles as a temporary network and storage infrastructure}}}, doi = {{10.1145/2633661.2633671}}, year = {{2014}}, } @inproceedings{11996, author = {{Eckert, Juergen and Sommer, Christoph and Eckhoff, David}}, booktitle = {{Proceedings of the 11th ACM symposium on Performance evaluation of wireless ad hoc, sensor, & ubiquitous networks - PE-WASUN '14}}, isbn = {{9781450330251}}, title = {{{Towards a simulation framework for paraglider networks}}}, doi = {{10.1145/2653481.2655754}}, year = {{2014}}, } @inproceedings{12002, author = {{Eckhoff, David and Dressler, Falko and Sommer, Christoph}}, booktitle = {{38th Annual IEEE Conference on Local Computer Networks}}, isbn = {{9781479905379}}, title = {{{SmartRevoc: An efficient and privacy preserving revocation system using parked vehicles}}}, doi = {{10.1109/lcn.2013.6761338}}, year = {{2014}}, } @article{12003, author = {{Eckhoff, David and Sommer, Christoph}}, issn = {{1540-7993}}, journal = {{IEEE Security & Privacy}}, pages = {{77--79}}, title = {{{Driving for Big Data? Privacy Concerns in Vehicular Networking}}}, doi = {{10.1109/msp.2014.2}}, year = {{2014}}, } @inproceedings{12008, author = {{Erlacher, Felix and Klingler, Florian and Sommer, Christoph and Dressler, Falko}}, booktitle = {{2014 11th Annual Conference on Wireless On-demand Network Systems and Services (WONS)}}, isbn = {{9781479949373}}, title = {{{On the impact of street width on 5.9 GHz radio signal propagation in vehicular networks}}}, doi = {{10.1109/wons.2014.6814735}}, year = {{2014}}, } @article{12038, author = {{Malandrino, Francesco and Casetti, Claudio and Chiasserini, Carla-Fabiana and Sommer, Christoph and Dressler, Falko}}, issn = {{0018-9545}}, journal = {{IEEE Transactions on Vehicular Technology}}, pages = {{4606--4617}}, title = {{{The Role of Parked Cars in Content Downloading for Vehicular Networks}}}, doi = {{10.1109/tvt.2014.2316645}}, year = {{2014}}, } @inproceedings{12046, author = {{Segata, Michele and Bloessl, Bastian and Joerer, Stefan and Sommer, Christoph and Lo Cigno, Renato and Dressler, Falko}}, booktitle = {{2013 IEEE Vehicular Networking Conference}}, isbn = {{9781479926879}}, title = {{{Short paper: Vehicle shadowing distribution depends on vehicle type: Results of an experimental study}}}, doi = {{10.1109/vnc.2013.6737623}}, year = {{2014}}, } @inproceedings{12049, author = {{Segata, Michele and Bloessl, Bastian and Sommer, Christoph and Dressler, Falko}}, booktitle = {{2014 IEEE International Conference on Communications (ICC)}}, isbn = {{9781479920037}}, title = {{{Towards energy efficient smart phone applications: Energy models for offloading tasks into the cloud}}}, doi = {{10.1109/icc.2014.6883681}}, year = {{2014}}, } @inproceedings{12067, author = {{Sommer, Christoph and Hagenauer, Florian and Dressler, Falko}}, booktitle = {{2014 IEEE World Forum on Internet of Things (WF-IoT)}}, isbn = {{9781479934591}}, title = {{{A networking perspective on self-organizing intersection management}}}, doi = {{10.1109/wf-iot.2014.6803164}}, year = {{2014}}, } @inproceedings{12073, author = {{Tung, Lung-Chih and Mena, Jorge and Gerla, Mario and Sommer, Christoph}}, booktitle = {{2013 12th Annual Mediterranean Ad Hoc Networking Workshop (MED-HOC-NET)}}, isbn = {{9781479910045}}, title = {{{A cluster based architecture for intersection collision avoidance using heterogeneous networks}}}, doi = {{10.1109/medhocnet.2013.6767414}}, year = {{2014}}, } @inproceedings{12977, author = {{Hellebrand, Sybille and Indlekofer, Thomas and Kampmann, Matthias and A. Kochte, Michael and Liu, Chang and Wunderlich, Hans-Joachim}}, booktitle = {{IEEE International Test Conference (ITC'14)}}, publisher = {{IEEE}}, title = {{{FAST-BIST: Faster-than-at-Speed BIST Targeting Hidden Delay Defects}}}, doi = {{10.1109/test.2014.7035360}}, year = {{2014}}, } @inproceedings{15660, author = {{Busjahn, Teresa and Bednarik, Roman and Schulte, Carsten}}, booktitle = {{ETRA}}, pages = {{335--338}}, publisher = {{ACM}}, title = {{{What influences dwell time during source code reading?: analysis of element type and frequency as factors}}}, year = {{2014}}, } @inproceedings{15661, author = {{Busjahn, Teresa and Schulte, Carsten and Sharif, Bonita and Begel, Andrew and Hansen, Michael and Bednarik, Roman and Orlov, Paul and Ihantola, Petri and Shchekotova, Galina and Antropova, Maria}}, booktitle = {{ICER}}, pages = {{3--10}}, publisher = {{ACM}}, title = {{{Eye tracking in computing education}}}, year = {{2014}}, } @inproceedings{15662, author = {{Busjahn, Teresa and Schulte, Carsten and Kropp, Edna}}, booktitle = {{PPIG}}, pages = {{15}}, publisher = {{Psychology of Programming Interest Group}}, title = {{{Developing Coding Schemes for Program Comprehension using Eye Movements}}}, year = {{2014}}, } @proceedings{15663, editor = {{Schulte, Carsten and E. Caspersen, Michael and Gal-Ezer, Judith}}, publisher = {{ACM}}, title = {{{Proceedings of the 9th Workshop in Primary and Secondary Computing Education, WiPSCE 2014, Berlin, Germany, November 5-7, 2014}}}, year = {{2014}}, } @article{15861, author = {{Riesen, Hans and Wiebeler, Christian and Schumacher, Stefan}}, issn = {{1089-5639}}, journal = {{The Journal of Physical Chemistry A}}, pages = {{5189--5195}}, title = {{{Optical Spectroscopy of Graphene Quantum Dots: The Case of C132}}}, doi = {{10.1021/jp502753a}}, year = {{2014}}, } @article{15862, author = {{Wiebeler, Christian and Schumacher, Stefan}}, issn = {{1089-5639}}, journal = {{The Journal of Physical Chemistry A}}, pages = {{7816--7823}}, title = {{{Quantum Yields and Reaction Times of Photochromic Diarylethenes: Nonadiabatic Ab Initio Molecular Dynamics for Normal- and Inverse-Type}}}, doi = {{10.1021/jp506316w}}, year = {{2014}}, } @inproceedings{15865, author = {{Lewandowski, P. and Ardizzone, V. and Tse, Y. 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25th International Conference, DEXA 2014}}, isbn = {{9783319100722}}, issn = {{0302-9743}}, pages = {{122--137}}, publisher = {{Springer}}, title = {{{Efficient XML Keyword Search Based on DAG-Compression}}}, doi = {{10.1007/978-3-319-10073-9_11}}, year = {{2014}}, } @article{15966, author = {{Niendorf, Thomas and Leuders, Stefan and Riemer, Andre and Brenne, Florian and Tröster, Thomas and Richard, Hans Albert and Schwarze, Dieter}}, issn = {{1438-1656}}, journal = {{Advanced Engineering Materials}}, pages = {{857--861}}, title = {{{Functionally Graded Alloys Obtained by Additive Manufacturing}}}, doi = {{10.1002/adem.201300579}}, year = {{2014}}, } @article{15967, author = {{Riemer, A. and Leuders, S. and Thöne, M. and Richard, H.A. and Tröster, Thomas and Niendorf, T.}}, issn = {{0013-7944}}, journal = {{Engineering Fracture Mechanics}}, pages = {{15--25}}, title = {{{On the fatigue crack growth behavior in 316L stainless steel manufactured by selective laser melting}}}, doi = {{10.1016/j.engfracmech.2014.03.008}}, year = {{2014}}, } @article{16046, author = {{Agarwal, M. and Fallah Tehrani, A. and Hüllermeier, Eyke}}, journal = {{Journal of Multi-Criteria Decision Analysis}}, number = {{3-4}}, title = {{{Preference-based learning of ideal solutions in TOPSIS-like decision models}}}, volume = {{22}}, year = {{2014}}, } @article{16060, author = {{Krotzky, T. and Fober, T. and Hüllermeier, Eyke and Klebe, G.}}, journal = {{IEEE/ACM Transactions of Computational Biology and Bioinformatics}}, number = {{5}}, pages = {{878--890}}, title = {{{Extended graph-based models for enhanced similarity search in Cabase}}}, volume = {{11}}, year = {{2014}}, } @article{16064, author = {{Hüllermeier, Eyke}}, journal = {{International Journal of Approximate Reasoning}}, number = {{7}}, pages = {{1519--1534}}, title = {{{Learning from imprecise and fuzzy observations: Data disambiguation through generalized loss minimization}}}, volume = {{55}}, year = {{2014}}, } @article{16069, author = {{Henzgen, Sascha and Strickert, M. and Hüllermeier, Eyke}}, journal = {{Evolving Systems}}, pages = {{175--191}}, title = {{{Visualization of evolving fuzzy-rule-based systems}}}, volume = {{5}}, year = {{2014}}, } @article{16077, author = {{Busa-Fekete, Robert and Szörenyi, B. and Weng, P. and Cheng, W. and Hüllermeier, Eyke}}, journal = {{Machine Learning}}, number = {{3}}, pages = {{327--351}}, title = {{{Preference-based reinforcement learning: evolutionary direct policy search using a preference-based racing algorithm.}}}, volume = {{97}}, year = {{2014}}, } @article{16078, author = {{Krempl, G. and Zliobaite, I. and Brzezinski, D. and Hüllermeier, Eyke and Last, M. and Lemaire, V. and Noack, T. and Shaker, A. and Sievi, S. and Spiliopoulou, M. and Stefanowski, J.}}, journal = {{SIGKDD Explorations}}, number = {{1}}, pages = {{1--10}}, title = {{{Open challenges for data stream mining research}}}, volume = {{16}}, year = {{2014}}, }