@inproceedings{11851, abstract = {{In diesem Beitrag werden zwei neuartige akustische Strahlformungsalgorithmen fuer einen Einsatz im KFZ diskutiert. In beiden Verfahren ist fuer jede Frequenzkomponente der Eigenvektor zum groessten Eigenwert eines verallgemeinerten Eigenwertproblems zu bestimmen: bei der einen Varianate stellen die Filterkoeffizienten gerade obigen Eigenvektor dar. Sprachverzerrungen werden mit einem einkanaligen Nachfilter kompensiert. In der anderen Variante, welche die Struktur eines ''Generalized Sidelobe Cancellers'' (GSC) hat, basiert die Blockiermatrix auf obiger Eigenvektorzerlegung.}}, author = {{Krueger, Alexander and Warsitz, Ernst and Haeb-Umbach, Reinhold}}, booktitle = {{34. Deutsche Jahrestagung fuer Akustik (DAGA 2008)}}, title = {{{Blinde Akustische Strahlformung fuer Anwendungen im KFZ}}}, year = {{2008}}, } @article{11914, abstract = {{This paper considers the convolutive blind source separation of speech sources in the presence of spatially correlated noise. We introduce a method for estimating the scaled mixing matrix from the sources to the microphones even if coherent noise is present. This is achieved by combining time-frequency sparseness with the generalized eigenvalue decomposition of the power spectral density matrix (PSD) of the noisy speech and noise-only microphone signals. Separation is performed by spatial filtering with coefficients constructed by Gram-Schmidt orthogonalization which places spatial nulls at the interferer{^A}?`s direction. Experimental results show that our approach is capable of separating 2 sources in a reverberant environment (RT60=0ms..500ms) degraded by significant directional noise.}}, author = {{Tran Vu, Dang Hai and Haeb-Umbach, Reinhold}}, journal = {{2008 ITG Conference on Voice Communication (SprachKommunikation)}}, pages = {{1--4}}, title = {{{Blind Speech Separation in Presence of Correlated Noise with Generalized Eigenvector Beamforming}}}, year = {{2008}}, } @inproceedings{11915, abstract = {{This Paper deals with a new Technique for multi-channel separation of speech signals from convolutive mixtures under coherent noise. We demonstrate how the scaled transfer functions from the sources to the microphones can be estimated even in the presence of stationary coherent noise. The key to this are generalized eigenvalue decompositions of the power spectral density (PSD) matrices of the noisy speech and noise-only microphone signals with a controlled estimation of these matrices exploiting time-frequency sparseness of the speech sources. Separation is further improved by subsequent Gram-Schmidt orthogonalization which places spatial nulls at the interferers{\rq} directions, while noise reduction is improved by employing a novel blocking matrix and adaptive interference canceller in a Generalized Sidelobe Canceller (GSC)-like structure. We report promising experimental results for 2 speech sources with significant coherent noise in reverberant environments (RT60=0oms..500ms).}}, author = {{Tran Vu, Dang Hai and Krueger, Alexander and Haeb-Umbach, Reinhold}}, booktitle = {{International Workshop on Acoustic Echo and Noise Control (IWAENC 2008)}}, title = {{{Generalized Eigenvector Blind Speech Separation Under Coherent Noise In A GSC Configuration}}}, year = {{2008}}, } @inproceedings{11935, abstract = {{The generalized sidelobe canceller by Griffith and Jim is a robust beamforming method to enhance a desired (speech) signal in the presence of stationary noise. Its performance depends to a high degree on the construction of the blocking matrix which produces noise reference signals for the subsequent adaptive interference canceller. Especially in reverberated environments the beamformer may suffer from signal leakage and reduced noise suppression. In this paper a new blocking matrix is proposed. It is based on a generalized eigenvalue problem whose solution provides an indirect estimation of the transfer functions from the source to the sensors. The quality of the new generalized eigenvector blocking matrix is studied in simulated rooms with different reverberation times and is compared to alternatives proposed in the literature.}}, author = {{Warsitz, Ernst and Krueger, Alexander and Haeb-Umbach, Reinhold}}, booktitle = {{IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2008)}}, keywords = {{adaptive interference canceller, adaptive signal processing, array signal processing, beamforming method, eigenvalues and eigenfunctions, generalized eigenvector blocking matrix, generalized sidelobe canceller, interference suppression, matrix algebra, noise suppression, speech enhancement, transfer function estimation, transfer functions}}, pages = {{73--76}}, title = {{{Speech enhancement with a new generalized eigenvector blocking matrix for application in a generalized sidelobe canceller}}}, doi = {{10.1109/ICASSP.2008.4517549}}, year = {{2008}}, } @inproceedings{11939, abstract = {{In this paper a switching linear dynamical model (SLDM) approach for speech feature enhancement is improved by employing more accurate models for the dynamics of speech and noise. The model of the clean speech feature trajectory is improved by augmenting the state vector to capture information derived from the delta features. Further a hidden noise state variable is introduced to obtain a more elaborated model for the noise dynamics. Approximate Bayesian inference in the SLDM is carried out by a bank of extended Kalman filters, whose outputs are combined according to the a posteriori probability of the individual state models. Experimental results on the AURORA2 database show improved recognition accuracy.}}, author = {{Windmann, Stefan and Haeb-Umbach, Reinhold}}, booktitle = {{IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2008)}}, keywords = {{a posteriori probability, AURORA2 database, Bayesian inference, Bayes methods, channel bank filters, extended Kalman filter banks, hidden noise state variable, Kalman filters, noise dynamics, speech enhancement, speech feature enhancement, speech feature trajectory, switching linear dynamical model approach}}, pages = {{4409--4412}}, title = {{{Modeling the dynamics of speech and noise for speech feature enhancement in ASR}}}, doi = {{10.1109/ICASSP.2008.4518633}}, year = {{2008}}, } @article{11940, abstract = {{In this paper, the noise estimation for model-based speech feature enhancement in automatic speech recognition (ASR) is investigated. Beside a stationary noise prior, three linear state space models for the (cepstral) noise process are considered. We have derived novel EM algorithms for the estimation of the noise model parameters: A blockwise EM algorithm is applied on noise-only input data. It is supposed to be used during the offline training mode of the recognizer. Further a sequential online EM algorithm is employed to adapt the observation variance in recognition mode which works as well under the asumption of a stationary noise prior and a linear state model for the noise. Experiments on the AURORA4 database lead to improved recognition results with the new state model compared to the assumption of stationary noise.}}, author = {{Windmann, Stefan and Haeb-Umbach, Reinhold}}, journal = {{2008 ITG Conference on Voice Communication (SprachKommunikation)}}, pages = {{1--4}}, title = {{{A novel approach to noise estimation in model-based speech feature enhancement}}}, year = {{2008}}, } @article{11944, abstract = {{In this paper, a novel segmental Hidden Markov Model (HMM) is proposed. The model is based on a modified emission density where additional statistical dependencies between subsequent frames of the speech signal are considered. In the following we derive an effective search strategy for the modified statistical model. Further an approach to parameter reduction is introduced. Experiments were carried out on the AURORA2 database where consistent im}}, author = {{Windmann, Stefan and Haeb-Umbach, Reinhold and Leutnant, Volker}}, journal = {{2008 ITG Conference on Voice Communication (SprachKommunikation)}}, pages = {{1--4}}, title = {{{A segmental HMM based on a modified emission probability}}}, year = {{2008}}, } @inproceedings{11972, author = {{Awad, Abdalkarim and Sommer, Christoph and German, Reinhard and Dressler, Falko}}, booktitle = {{2008 5th IEEE International Conference on Mobile Ad Hoc and Sensor Systems}}, isbn = {{9781424425747}}, title = {{{Virtual Cord Protocol (VCP): A flexible DHT-like routing service for sensor networks}}}, doi = {{10.1109/mahss.2008.4660079}}, year = {{2008}}, } @inproceedings{11991, author = {{Dressler, Falko and Sommer, Christoph and Gansen, Tobias and Wischhof, Lars}}, booktitle = {{2008 5th IEEE International Conference on Mobile Ad Hoc and Sensor Systems}}, isbn = {{9781424425747}}, title = {{{Requirements and objectives for secure Traffic Information Systems}}}, doi = {{10.1109/mahss.2008.4660135}}, year = {{2008}}, } @inproceedings{12052, author = {{Sommer, Christoph and Dietrich, Isabel and Dressler, Falko}}, booktitle = {{2007 Mobile Networking for Vehicular Environments}}, title = {{{Realistic Simulation of Network Protocols in VANET Scenarios}}}, doi = {{10.1109/move.2007.4300819}}, year = {{2008}}, } @inproceedings{12053, author = {{Sommer, Christoph and Yao, Zheng and German, Reinhard and Dressler, Falko}}, booktitle = {{Proceeding of the 1st ACM SIGMOBILE workshop on Mobility models - MobilityModels '08}}, isbn = {{9781605581118}}, title = {{{On the need for bidirectional coupling of road traffic microsimulation and network simulation}}}, doi = {{10.1145/1374688.1374697}}, year = {{2008}}, } @article{12054, author = {{Sommer, Christoph and Dressler, Falko}}, issn = {{0163-6804}}, journal = {{IEEE Communications Magazine}}, pages = {{132--137}}, title = {{{Progressing toward realistic mobility models in VANET simulations}}}, doi = {{10.1109/mcom.2008.4689256}}, year = {{2008}}, } @misc{15323, author = {{Henning, Bernd}}, title = {{{Tomografische Ultraschallmessverfahren für die Prozessmesstechnik}}}, year = {{2008}}, } @article{15324, author = {{Henning, Bernd}}, journal = {{Technisches Messen}}, number = {{4}}, pages = {{217--220}}, title = {{{Editorial: XXI. Messtechnisches Symposium des Arbeitskreises der Hochschullehrer für Messtechnik (AHMT), Paderborn, 20.--22.09.2007}}}, year = {{2008}}, } @misc{15325, author = {{Henning, Bernd}}, title = {{{Verfahren zur Bestimmung einer Eigenschaft eines strömenden Mediums sowie Ultraschallzähler}}}, year = {{2008}}, } @inproceedings{15326, abstract = {{In this contribution it is shown that the modal components of the received signal at the end of an acoustic waveguide can be suppressed or intensified if the two electrodes of a piezo-electric ceramic are shaped in a special way. With this it is possible to measure different signals which can be used to differ between the liquids dissipation and the signal attenuation caused by the waveguide geometry as well as impedance conditions. With the help of the principal component analysis it should be possible to infer the modal amplitudes from the received signals of one ultrasonic transducer and to calculate the acoustic impedance of the liquid that is included in the wave guide.}}, author = {{Rautenberg, Jens and Henning, Bernd}}, isbn = {{978-3-18-092011-5}}, title = {{{Separation und Bewertung verschiedener Moden der Schallausbreitung im akustischen Wellenleiter}}}, year = {{2008}}, } @inproceedings{15327, abstract = {{This contribution is about different types of sonagram processing and their application for the simultaneous direct and indirect measurement of both the longitudinal and the transversal ultrasound velocities of highly absorbing isotropic synthetic polymers. Therefore, the pulse transmission of an initially longitudinal wave through a hollow cylindrical specimen is investigated experimentally and theoretically.}}, author = {{Rautenberg, Jens and Henning, Bernd}}, location = {{Dresden}}, pages = {{148--151}}, title = {{{Simultaneous direct and indirect measurement of sound velocities}}}, year = {{2008}}, } @misc{15328, author = {{Rautenberg, Jens and Ziegler, Horst and Gaugler, Ulrich and Dietz, Gerhard and Unverzagt, Carsten and Kehl, Romina and Henning, Bernd}}, title = {{{Piezosensor zur Temperaturmessung}}}, year = {{2008}}, } @misc{15329, author = {{Rautenberg, Jens and Ziegler, Horst and Gaugler, Ulrich and Dietz, Gerhard and Unverzagt, Carsten and Kehl, Romina and Henning, Bernd}}, title = {{{Verfahren zur Bestimmung einer Eigenschaft eines strömenden Mediums}}}, year = {{2008}}, } @inproceedings{15687, author = {{Schulte, Carsten}}, booktitle = {{ICER}}, pages = {{149--160}}, publisher = {{ACM}}, title = {{{Block Model: an educational model of program comprehension as a tool for a scholarly approach to teaching}}}, year = {{2008}}, } @inproceedings{15688, author = {{Schulte, Carsten}}, booktitle = {{ISSEP}}, pages = {{110--121}}, publisher = {{Springer}}, title = {{{Duality Reconstruction - Teaching Digital Artifacts from a Socio-technical Perspective}}}, volume = {{5090}}, year = {{2008}}, } @inproceedings{15689, author = {{Dörge, Christina and Schulte, Carsten}}, booktitle = {{ITiCSE}}, pages = {{296--300}}, publisher = {{ACM}}, title = {{{What are information technology's key qualifications?}}}, year = {{2008}}, } @inproceedings{15690, author = {{Schulte, Carsten and Dörge, Christina}}, booktitle = {{DDI}}, pages = {{13--22}}, publisher = {{GI}}, title = {{{Digitale Artefakte und Schlüsselkompetenzen im Informatikunterricht der Sekundarstufe I}}}, volume = {{P-135}}, year = {{2008}}, } @inproceedings{15779, author = {{Hüllermeier, Eyke and Vanderlooy, S.}}, booktitle = {{In Proceedings Workshop LWA-2008, Lernen-Wissensentdeckung-Adaptivität, Würzburg, Germany}}, pages = {{34--41}}, title = {{{Weighted voting as approximate MAP prediction in pairwise classification}}}, year = {{2008}}, } @inproceedings{15780, author = {{Fober, T. and Hüllermeier, Eyke and Mernberger, M.}}, booktitle = {{In Proceedings Workshop LWA-2008, Lernen-Wissensentdeckung-Adaptivität, Würzburg, Germany}}, pages = {{27--33}}, title = {{{Evolutionary construction of multiple graph alignments for mining structured biomolecular data }}}, year = {{2008}}, } @inproceedings{15781, author = {{Fober, T. and Hüllermeier, Eyke and Mernberger, M.}}, booktitle = {{iIn Proceedings GCB-2008, Germany Conference on Bioinformatics, Dresden 2008}}, editor = {{Beyer, A. and Schroeder, M.}}, pages = {{44--53}}, title = {{{Evolutionary construction of multiple graph alignments for the structural analysis of biomolecules}}}, year = {{2008}}, } @techreport{14925, author = {{Bischoff, Dennis and Halberstadt, Alexander and Sureth, Caren}}, title = {{{Internationalisierung, Unternehmensgröße und Konzernsteuerquote}}}, volume = {{56}}, year = {{2008}}, } @techreport{14926, author = {{Dahle, Claudia and Sureth-Sloane, Caren}}, title = {{{Income-Related Minimum Taxation Concepts and Their Impact on Corporate Investment Decisions}}}, volume = {{55}}, year = {{2008}}, } @article{14928, author = {{Kiesewetter, Dirk and Niemann, Rainer and Hundsdoerfer, Jochen and Knirsch, Deborah and König, Rolf and Kruschwitz, Lutz and Löffler, Andreas and Maiterth, Ralf and Müller, Heiko and Sureth-Sloane, Caren and Treisch, Corinna}}, journal = {{Der Betrieb}}, number = {{18}}, pages = {{957--958}}, title = {{{arqus-Stellungnahme zur notwendigen Reform der Abgeltungssteuer}}}, volume = {{61}}, year = {{2008}}, } @article{14929, author = {{Knirsch, Deborah and Müller, Heiko and Blaufus, Kay and Hundsdoerfer, Jochen and Kiesewetter, Dirk and König, Rolf and Kruschwitz, Lutz and Löffler, Andreas and Maiterth, Ralf and Müller, Heiko and Sureth-Sloane, Caren and Treisch, Corinna}}, journal = {{Deutsches Steuerrecht}}, number = {{38}}, pages = {{1844--1846}}, title = {{{ arqus-Stellungnahme: Das BilMoG - Eine Chance zur Steuervereinfachung?}}}, volume = {{46}}, year = {{2008}}, } @techreport{14930, author = {{Maßbaum, Alexandra and Sureth-Sloane, Caren}}, title = {{{The Impact of Thin Captialization Rules on Shareholder Financing}}}, volume = {{39}}, year = {{2008}}, } @book{14931, author = {{Müller, Jens and Sureth-Sloane, Caren}}, isbn = {{9783834912879}}, title = {{{Unternehmensbewertung für substanzsteuerliche Zwecke - Eine empirische Analyser des Stuttgarter Verfahrens und alternative Ansätze}}}, doi = {{10.1007/978-3-8349-9927-6}}, year = {{2008}}, } @techreport{14932, author = {{Niemann, Rainer and Sureth-Sloane, Caren}}, title = {{{Steuern und Risiko als substitutionale oder komplementäre Determinanten unternehmerischer Investitionspolitik?}}}, volume = {{51}}, year = {{2008}}, } @inbook{14934, author = {{Sureth-Sloane, Caren and Müller, Jens and Houben, Henriette and Maiterth, Ralf}}, booktitle = {{Untrnehmensbesteuerung 2008: Neue Wege gehen}}, editor = {{Oestreicher, Andreas}}, pages = {{183--208}}, publisher = {{Verlag Neue Wirtschafts-Briefe, Herne}}, title = {{{Auswirkungen einer Reform des Erbschaft- und Schenkungsteuergesetzes auf das Steueraufkommen unter besonderer Berücksichtigung einer verkehrswertorientierten Bewertung von Unternehmens- und Grundvermögen}}}, year = {{2008}}, } @article{14936, author = {{Sureth-Sloane, Caren and Nordhoff, Daniel}}, journal = {{Der Betrieb}}, number = {{7}}, pages = {{305--311}}, title = {{{Kritische Anmerkungen zur Ermittlung des tatsächlichen Werts einer Familienpersonengesellschaft nach neuer Rechtslage}}}, volume = {{61}}, year = {{2008}}, } @article{14937, author = {{Sureth-Sloane, Caren and Nordhoff, Daniel}}, journal = {{DATEV BILDUNGSforum}}, number = {{3}}, pages = {{15--17}}, title = {{{ Praxisnähe und universitäre Ausbildung: Fallstudie der Universität Paderborn}}}, volume = {{8}}, year = {{2008}}, } @techreport{14938, author = {{Sureth-Sloane, Caren and Üffing, Michaela}}, title = {{{Proposals for a European Corporate Taxation and Their Influence on Multinationals' Tax Planning}}}, volume = {{54}}, year = {{2008}}, } @article{14994, author = {{Zukic, D. and Elsner, A. and Avdagic, Z. and Domik, Gitta}}, journal = {{Proceedings of 11th International Conference on Computer Graphics and Artificial Intelligence}}, pages = {{183--190}}, title = {{{Neural networks in 3D medical scan visualization}}}, year = {{2008}}, } @phdthesis{15140, author = {{Hartel, Rita}}, publisher = {{University of Paderborn, Germany}}, title = {{{Navigierbare Kompression von XML-Datenströmen}}}, year = {{2008}}, } @inproceedings{15141, author = {{Böttcher, Stefan and Hartel, Rita and Kirschner, Matthias}}, booktitle = {{Third International Conference on Availability, Reliability and Security}}, isbn = {{9780769531021}}, pages = {{771--778}}, publisher = {{IEEE}}, title = {{{Detecting Suspicious Relational Database Queries}}}, doi = {{10.1109/ares.2008.125}}, year = {{2008}}, } @inproceedings{15142, author = {{Böttcher, Stefan and Hartel, Rita and Heinzemann, Christian}}, booktitle = {{WEBIST 2008, Proceedings of the Fourth International Conference on Web Information Systems and Technologies}}, pages = {{13--21}}, publisher = {{INSTICC}}, title = {{{BSBC: Towards a Succinct Data Format for XML Streams}}}, year = {{2008}}, } @inproceedings{15143, author = {{Böttcher, Stefan and Hartel, Rita and Heinzemann, Christian}}, booktitle = {{Web Information Systems and Technologies, 4th International Conference, WEBIST 2008, Revised Selected Papers}}, isbn = {{9783642013430}}, issn = {{1865-1348}}, pages = {{65--79}}, publisher = {{Springer}}, title = {{{Compressing XML Data Streams with DAG+BSBC}}}, doi = {{10.1007/978-3-642-01344-7_6}}, year = {{2008}}, } @misc{15243, author = {{Henning, Bernd}}, title = {{{Ultraschall-Messtechnik und Ultraschall-Tomografie}}}, year = {{2008}}, } @inproceedings{15954, author = {{Tröster, Thomas and Howe, C. and Müller, M. and Rostek, W.}}, location = {{Wiesbaden}}, title = {{{Development status and market potential of hot formed ballistic steels}}}, year = {{2008}}, } @article{15955, abstract = {{The present paper reports on the effect of texture on the cyclic stress-strain response (CSSR) and the fatigue life of ultrafine-grained (UFG) interstitial-free (IF) steel. Tests in the lowcycle fatigue (LCF) regime were conducted on material that was processed by the equal channel angular extrusion (ECAE) technique along the so called “efficient” route 8E. This route has been shown to result in a homogeneous microstructure with a high fraction of high angle grain boundaries (HAGBs), which are beneficial for a stable CSSR. In addition, the evolution of the microstructure was characterized by means of electron optical techniques, including electron backscattered diffraction, and by X-Ray diffractometry. It was found that the initial texture of specimens cut from the ECAE billet along different orientations with respect to the extrusion direction (ED) has a substantial effect on the CSSR of the UFG IF steel. Furthermore, microscopy results indicated the notable influence of the last ECAE processing step on the evolution of damage in the material.}}, author = {{Niendorf, Thomas and Marten, Thorsten and Maier, Hans J. and Karaman, Ibrahim}}, issn = {{1662-9752}}, journal = {{Materials Science Forum}}, pages = {{864--869}}, title = {{{The Effect of Texture on the Fatigue Properties of Ultrafine-Grained Interstitial-Free Steel}}}, doi = {{10.4028/www.scientific.net/msf.584-586.864}}, volume = {{584-586}}, year = {{2008}}, } @article{16164, author = {{Hühn, J. and Hüllermeier, Eyke}}, journal = {{International Journal of Data Mining, Modeling and Management }}, number = {{1}}, pages = {{45--67}}, title = {{{Is an ordinal class structure useful in classifier learning?}}}, volume = {{1}}, year = {{2008}}, } @article{16166, author = {{Hüllermeier, Eyke and Fürnkranz, J. and Cheng, W. and Brinker, K.}}, journal = {{Artificial Intelligence}}, pages = {{1897--1917}}, title = {{{Label ranking by learning pairwise preferences}}}, volume = {{172}}, year = {{2008}}, } @article{16167, author = {{Vanderlooy, S. and Hüllermeier, Eyke}}, journal = {{Machine Learning}}, pages = {{247--272}}, title = {{{A critical analysis of variants of the AUC}}}, volume = {{72}}, year = {{2008}}, } @article{16168, author = {{Fürnkranz, J. and Hüllermeier, Eyke and Mencia, E. and Brinker, K.}}, journal = {{Machine Learning}}, number = {{2}}, pages = {{133--153}}, title = {{{Multilabel classification via calibrated label ranking}}}, volume = {{73}}, year = {{2008}}, } @article{16169, author = {{Hüllermeier, Eyke and Brinker, K.}}, journal = {{Fuzzy Sets and Systems}}, number = {{18}}, pages = {{2337--2352}}, title = {{{Learning valued preference structures for solving classification problems}}}, volume = {{159}}, year = {{2008}}, }