@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}}, }