@article{11732, abstract = {{Satellite positioning systems, such as GPS or the future European system Galileo, employ direct-sequence spread-spectrum signals. The positioning accuracy is strongly affected by the quality of the pseudo range measurements. These measurements necessitate code and carrier synchronization of the received signal with the internally generated reference signals. In this type of systems one major error source is the multipath phenomenon, which results in a sum of delayed and weighted copies of the original signal to be present at the receiver input. This can result in a systematic error of the code tracking loop resulting in range errors in the order of several tens of meters. In this paper we propose an extension of the standard code tracking loop capable of estimating the parameters of the line-of-sight (LOS) signal and separating the LOS from the reflected signal portions. It is based on an analysis of the cross correlation of the received signal with a locally generated code sequence in the vicinity of the tracking point of a Delay-Locked Loop (DLL). For this reason, we call this method Cross Correlation Function (CCF) Analysis. The proposed method achieves considerably more accurate estimates than a DLL. Its performance is comparable to the Multipath Estimating Delay-Locked Loop (MEDLL) which is considered to be the best method for reducing multipath induced errors, so far. However, the computational complexity of the CCF Analysis is by a factor of three smaller compared to the MEDLL. Extensive simulations have been conducted for the proposed method and the MEDLL in order to assess the robustness of the two approaches under various signal constellations.}}, author = {{Bischoff, R. and Haeb-Umbach, Reinhold and Nammi, Sai Ramesh}}, journal = {{AEUe, Int. Journal on Electronics and Communications}}, number = {{1}}, title = {{{Multipath-Resistant Time of Arrival Estimation for Satellite Positioning}}}, volume = {{58}}, year = {{2004}}, } @inproceedings{11790, abstract = {{A major drawback of distributed versus terminal-based speech recognition is the fact that transmission errors can lead to degraded recognition performance. In this paper we employ soft features to mitigate the effect of bit errors on wireless transmission links: At the receiver a posteriori probabilities of the transmitted feature vectors are computed by combining bit reliability information provided by the channel decoder and a priori knowledge about residual redundancy in the feature vectors. While the first-order moment of the a posteriori probability function is the MMSE estimate, the second-order moment is a measure of the uncertainty in the reconstructed features. We conducted realistic simulations of GSM transmission and achieved significant improvements in word accuracy compared to the error mitigation strategy described in the ETSI standard.}}, author = {{Haeb-Umbach, Reinhold and Ion, Valentin}}, booktitle = {{International Conference on Spoken Language Processing (ICSLP 2004)}}, title = {{{Soft Features for Improved Distributed Speech Recognition over Wireless Networks}}}, year = {{2004}}, } @inproceedings{11931, abstract = {{The paper is concerned with binaural signal processing for a bimodal human-robot interface with hearing and vision. The two microphone signals are processed to obtain an enhanced single-channel input signal for the subsequent speech recognizer and to localize the acoustic source, an important information for establishing a natural human-robot communication. We utilize a robust adaptive algorithm for filter-and-sum beamforming (FSB) and extract speaker direction information from the resulting FIR filter coefficients. Further, particle filtering is applied which conducts a nonlinear Bayesian tracking of speaker movement. Good location accuracy can be achieved even in highly reverberant environments. The results obtained outperform the conventional generalized cross correlation (GCC) method.}}, author = {{Warsitz, Ernst and Haeb-Umbach, Reinhold}}, booktitle = {{IEEE Workshop on Multimedia Signal Processing (MMSP 2004)}}, keywords = {{bimodal human-robot interface, binaural signal processing, enhanced single-channel input signal, filter-and-sum beamforming, filtering theory, FIR filter coefficient, generalized cross correlation method, microphones, microphone signal, nonlinear Bayesian tracking, particle filtering, robust adaptive algorithm, robust speaker direction estimation, signal processing, speech enhancement, speech recognition, speech recognizer, user interfaces}}, pages = {{367--370}}, title = {{{Robust speaker direction estimation with particle filtering}}}, doi = {{10.1109/MMSP.2004.1436569}}, year = {{2004}}, } @inproceedings{11932, abstract = {{While the main objective of adaptive Filter-and-Sum beamforming is to obtain an enhanced speech signal for subsequent processing like speech recognition, we show how speaker localization information can be derived from the filter coefficients. To increase localization accuracy, speaker tracking is performed by non-linear Bayesian state estimation, which is realized by sequential Monte Carlo methods. Improved acquisition and tracking performance was achieved even in highly reverberant environments, in comparison with both a Kalman Filter and a recently proposed Particle Filter operating on the output of a nonadaptive Delay-and-Sum beamformer.}}, author = {{Warsitz, Ernst and Haeb-Umbach, Reinhold and Peschke, Sven}}, booktitle = {{International Conference on Spoken Language Processing (ICSLP 2004)}}, title = {{{Adaptive Beamforming Combined with Particle Filtering for Acoustic Source Localization}}}, year = {{2004}}, } @inbook{12897, author = {{Beutner, Marc and Twardy, M}}, booktitle = {{Mensch. Bildung. Beruf. Herausforderungen an die Berufspädagogik. Dortmunder Beiträge zur Pädagogik}}, editor = {{Busian, A and Drees, G and Lang, M}}, pages = {{81 -- 96}}, publisher = {{Projekt Verlag}}, title = {{{Berufskollegs als Kompetenzzentren und die damit verbundenen Kooperationsanforderungen zwischen Bildungsgängen}}}, volume = {{35}}, year = {{2004}}, } @inproceedings{15362, abstract = {{In der industriellen Messtechnik werden optische, chemische und akustische Messverfahren zur Ermittlung von Prozessgrößen eingesetzt. Dabei haben die akustischen Messverfahren aufgrund ihrer Robustheit und Wartungsfreundlichkeit ein sehr großes Einsatzgebiet. Impulsbasierte Ultraschallmesssysteme werden unter anderem zur Messung von Durchfluss und Füllstand eingesetzt. Zunehmend werden sie aber auch in der Flüssigkeitsanalytik zur Konzentrationsmessung und Stoffanalyse herangezogen. Dabei führen Gasblasen in den zu untersuchenden flüssigen Medien immer wieder zu Problemen, da bei Anwesenheit von Gasblasen die akustischen Stoffkenngrößen verändert werden. Diese Probleme können ihre Ursache auch in der Signalverarbeitung haben. Dieser Beitrag soll zeigen, welche Methoden zur Signalverarbeitung geeignet sind um dieses Problem zu lösen. }}, author = {{Gulsch, Michael and Henning, Bernd}}, location = {{ Ludwigsburg}}, pages = {{31}}, title = {{{Neue Methoden der Signalauswertung für Ultraschall-Messsysteme}}}, year = {{2004}}, } @inproceedings{15363, abstract = {{The classical forms of noise present in the frequency of MEMS resonators have been recently investigated and described in detail. The present paper extends this investigation to 1/f noise. That is of fundamental nature in microelectromechanical systems (MEMS) resonators, and is given by the universal quantum 1/f effect. In recent years new piezoelectric and compound semiconductor materials have been developed along with advanced manufacturing technologies for MEMS including them. These technologies enable the deposition of thin compound semiconductor, or PZT films and their integration into MEMS devices.}}, author = {{Handel, Peter and Henning, Bernd}}, isbn = {{80-2272050-X}}, location = {{Smolenice, Slovakia}}, pages = {{88--89}}, title = {{{1/f-Frequency Fluctations and Phase Noise in MEMS Resonators}}}, year = {{2004}}, } @article{15364, author = {{Henning, Bernd}}, journal = {{Technisches Messen}}, number = {{9}}, pages = {{492--500}}, title = {{{Die akustische Impedanz als Messgröße zur Charakterisierung flüssiger Stoffsysteme}}}, volume = {{71}}, year = {{2004}}, } @inproceedings{15365, abstract = {{The appliance of time-reversal acoustics to classical trans-ducer design, medical, technical or audible range applica-tions brings forward new ideas whenever we need both, focusing acoustical energy in time and space. Unfortunately, the spatiotemporal focusing is limited through the amount of applied transducer elements as well as the ergodicity and randomness of the cavity [1]. This paper will show how the simulated annealing technique, a multi-objec¬tive optimiza-tion algorithm [2], is used to increase the nar¬rowness of the refocused spot by breaking up randomness for the benefit of ergodicity in a predetermined cavity.}}, author = {{Rautenberg, Jens and Olszewski, Dirk and Henning, Bernd}}, booktitle = {{Proceedings of the Joint Congress CFA/DAGA 2004}}, isbn = {{2-9521105-2-2}}, pages = {{1021--1022}}, publisher = {{DEGA}}, title = {{{A Space Optimization Method for Time-Reversal Super-Focusing}}}, year = {{2004}}, } @inproceedings{15801, author = {{Dubois, D. and Hüllermeier, Eyke and Prade, H.}}, booktitle = {{In Proceedings of the Workshop on Alternative Techniques for Data Mining and Knowledge Discovery, IEEE International Conference on Data Mining, Brighton, UK}}, editor = {{Cubero, JC. and Sanchez, D. and Ras, Z. and Sudkamp, T.}}, title = {{{A systematic approach to the assessment of fuzzy association rules}}}, year = {{2004}}, } @inproceedings{15804, author = {{Weskamp, N. and Hüllermeier, Eyke and Kuhn, D. and Klebe, G.}}, booktitle = {{In Proceedings of GCB-2004 of the German Conference on Bioinformatics, Bielefeld, Germany}}, editor = {{Giegerich, R. and Stoye, J.}}, pages = {{131--140}}, publisher = {{Springer}}, title = {{{Graph alignments: A new concept to detect conserved regions in protein active sites}}}, year = {{2004}}, } @inproceedings{14842, author = {{Hüllermeier, Eyke}}, booktitle = {{In Proceedings ECAI-2004, 16th European Conference on Artificial Inteligence, Valencia, Spain}}, editor = {{Lopez de Mantaras, R. and Saitta, L.}}, pages = {{97--101}}, publisher = {{IOS Press}}, title = {{{Instance-based prediction with guaranteed confidence}}}, year = {{2004}}, } @article{14963, author = {{Bach, Stefan and Haan, Peter and Maiterth, Ralf and Sureth-Sloane, Caren}}, journal = {{DIW Berlin: Politikberatung kompakt}}, title = {{{Modelle für die Vermögensbesteuerung von natürlichen Personen und Kapitalgesellschaften - Konzepte, Aufkommen, wirtschaftliche Wirkungen}}}, volume = {{1}}, year = {{2004}}, } @article{14964, author = {{Müller, Jens and Nordhoff, Daniel and Sureth-Sloane, Caren}}, journal = {{Fach 30}}, pages = {{1517--1520}}, title = {{{Der Betriebsausgabenabzug nach aktuellem Recht – Rechtliche Grundlagen und ökonomische Wirkungen, Buchführung, Bilanz, Kostenrechnung, Betrieb und Rechnungswesen}}}, year = {{2004}}, } @article{14966, author = {{Sureth-Sloane, Caren and Nordhoff, Daniel}}, journal = {{Zeitschrift für Steuern und Recht}}, number = {{15}}, pages = {{326--334}}, title = {{{Verschmelzung einer Kapitalgesellschaft auf eine Personengesellschaft - Sind Bilanzierungswahlrechte gemäß § 3 UmwStG notwendig?}}}, volume = {{1}}, year = {{2004}}, } @inproceedings{15039, author = {{Goetz, F. and Hinn, R. and Domik, Gitta}}, booktitle = {{Paderborner Workshop Augmented \& Virtual Reality in der Produktentstehung, Paderborn, Germany}}, title = {{{Augmented Reality als Hilfsmittel zur Navigation und Interaktion in kooperativen Visualisierungen. 3}}}, year = {{2004}}, } @inproceedings{15157, author = {{Böttcher, Stefan and Steinmetz, Rita}}, booktitle = {{Proceedings of the International Conference on Internet Computing, IC '04}}, pages = {{587--593}}, title = {{{Optimized Internet Search Based on a Intersection Test for XPath Expressions under a DTD}}}, year = {{2004}}, } @inproceedings{15217, author = {{Hüllermeier, Eyke and Fürnkranz, J.}}, booktitle = {{In Proceedings IPMU-2004 10th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, Perugia, Italy}}, title = {{{Comparison of ranking procedures in pairwise preference learning}}}, year = {{2004}}, } @inproceedings{15218, author = {{Hüllermeier, Eyke and Fürnkranz, J.}}, booktitle = {{in Proceedings FUZZ-IEEE-04, IEEE International Conference on Fuzzy Systems, Budapest, Hungary}}, title = {{{Ranking by pairwise comparison: A note on risk minimization}}}, year = {{2004}}, } @inproceedings{15219, author = {{Karimi, I. and Hüllermeier, Eyke and Meskouris, K.}}, booktitle = {{in Proceedings 6th International FLINS Conference on Applied Computational Intelligence, Duinse Polders, Blankenberg,Belgien}}, title = {{{An earthquake risk assessment method based on fuzzy probability}}}, year = {{2004}}, } @inproceedings{15220, author = {{Hüllermeier, Eyke and Beringer, J.}}, booktitle = {{In Proceedings IPMU-2004 10th International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, Perugia, Italy}}, title = {{{Learning decision rules from positive and negative preferences}}}, year = {{2004}}, } @book{1616, author = {{Krimphove, Dieter}}, pages = {{194}}, publisher = {{Haufe-Verlag}}, title = {{{Die UWG-Reform Das neue Gesetz gegen den unlauteren Wettbewerb }}}, year = {{2004}}, } @book{1617, author = {{Krimphove, Dieter}}, pages = {{144}}, publisher = {{Haufe-Verlag}}, title = {{{Werberecht Prüfungswissen, Multiple-Choice-Tests, Gesetze, Urteile}}}, year = {{2004}}, } @article{16185, author = {{Hüllermeier, Eyke and Renners, I. and Grauel, A.}}, journal = {{Mathware and Soft Computing}}, number = {{2-3}}, pages = {{109--124}}, title = {{{An evolutionary approach to constraints-regularized learning}}}, volume = {{11}}, year = {{2004}}, } @article{16186, author = {{Weskamp, N. and Kuhn, D. and Hüllermeier, Eyke and Klebe, G.}}, journal = {{Bioinformatics}}, number = {{10}}, pages = {{1522--1526}}, title = {{{Efficient similarity search in protein structure databases: Improving clique-detection through clique-hashing}}}, volume = {{20}}, year = {{2004}}, } @article{16187, author = {{Hüllermeier, Eyke}}, journal = {{International Journal of Intelligent Systems}}, number = {{6}}, pages = {{525--541}}, title = {{{Flexible constraints for regularization in learning from data}}}, volume = {{19}}, year = {{2004}}, } @article{16399, abstract = {{We present a new data structure for rendering highly complex virtual environments of arbitrary topology. The special feature of our approach is that it allows an interactive navigation in very large scenes (30 GB/400 million polygons in our benchmark scenes) that cannot be stored in main memory, but only on a local or remote hard disk. Furthermore, it allows interactive rendering of substantially more complex scenes by instantiating objects. The sampling process is done in the preprocessing. There, the polygons are randomly distributed in our hierarchical data structure, the randomized sample tree. This tree only uses space that is linear in the number of polygons. In order to produce an approximate image of the scene, the tree is traversed and polygons stored in the visited nodes are rendered. During the interactive walkthrough, parts of the sample tree are loaded from local or remote hard disk. We implemented our algorithm in a prototypical walkthrough system. Analysis and experiments show that the quality of our images is comparable to images computed by the conventional z-buffer algorithm regardless of the scene topology.}}, author = {{Klein, Jan and Krokowski, Jens and Fischer, Matthias and Wand, Michael and Wanka, Rolf and Meyer auf der Heide, Friedhelm}}, issn = {{1054-7460}}, journal = {{Presence: Teleoperators and Virtual Environments}}, pages = {{617--637}}, title = {{{The Randomized Sample Tree: A Data Structure for Interactive Walk-Throughs in Externally Stored Virtual Environments}}}, doi = {{10.1162/1054746043280619}}, year = {{2004}}, } @book{1640, editor = {{Schmeisser, Wilhelm and Krimphove, Dieter and Brinkkötter, Hans-Otto}}, pages = {{223}}, publisher = {{Rainer Hampp Verlag}}, title = {{{Internationales Entgeltmanagement}}}, year = {{2004}}, } @book{1641, editor = {{Schmeisser, Wilhelm and Bretz, Michael and Keßler, Jürgen and Krimphove, Dieter}}, pages = {{410}}, publisher = {{Schäffer-Poeschel Verlag}}, title = {{{Handbuch: Krisen- und Insolvenzmanagement}}}, year = {{2004}}, } @inproceedings{13071, author = {{Liu Jing, Michelle and Ruehrup, Stefan and Schindelhauer, Christian and Volbert, Klaus and Dierkes, Martin and Bellgardt, Andreas and Ibers, Rüdiger and Hilleringmann, Ulrich}}, booktitle = {{{GOR/NGB Conference Tilburg 2004}}}, title = {{{Sensor Networks with More Features Using Less Hardware}}}, year = {{2004}}, } @misc{13099, author = {{Breu, Ruth and Fahringer, Thomas and Fensel, Dieter and Hellebrand, Sybille and Middeldorp, Aart and Scherzer, Otmar}}, title = {{{Im Westen viel Neues - Informatik an der Universität Innsbruck}}}, year = {{2004}}, } @misc{13100, author = {{Hellebrand, Sybille and Wuertenberger, Armin and S. Tautermann, Christofer}}, keywords = {{WORKSHOP}}, title = {{{Data Compression for Multiple Scan Chains Using Dictionaries with Corrections}}}, year = {{2004}}, } @inproceedings{13369, author = {{Trier, Matthias and Müller, Claudia and Herzog, Michael}}, booktitle = {{Proceedings Potsdamer Multimedia Konferenz 2004}}, title = {{{Effiziente Videoproduktionsprozesse fuer komponentenbasierte E-Learning Inhalte}}}, year = {{2004}}, } @inproceedings{13372, author = {{Herzog, Michael A. and Trier, Matthias}}, publisher = {{Verlag Peter Lang}}, title = {{{Konzepte für die Videoproduktion in virtuellen Lernszenarien Beitrag zum Kollegiatentag 2004 des SVKB}}}, year = {{2004}}, } @inproceedings{13373, author = {{Trier, Matthias}}, booktitle = {{Proceedings Sunbelt XXIV Conference, Portoroz, Slovene, INSNA Association, 2004}}, title = {{{IT-Supported Monitoring and Analysis of Social Networks in Virtual Knowledge Communities}}}, year = {{2004}}, } @inproceedings{13375, author = {{Trier, Matthias and Bobrik, A.}}, booktitle = {{Proceedings Sunbelt XXVII Conference, Corfu, Greece, INSNA Association, 2007.}}, title = {{{Measuring Brokering Activity - a novel measure for dynamic network evolution}}}, year = {{2004}}, } @inproceedings{1002, author = {{Carlson, Emma and Bettstetter, Christian and Karl, Holger and Prehofer, Christian and Wolisz, Adam}}, booktitle = {{Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th}}, pages = {{2994----2998}}, title = {{{Distributed maintenance of resource reservation paths in multihop 802.11 networks}}}, year = {{2004}}, } @inproceedings{1006, author = {{Gross, James and Karl, Holger and Wolisz, Adam}}, booktitle = {{European Wireless 2004}}, title = {{{On the effect of inband signaling and realistic channel knowledge on dynamic OFDM-FDMA systems}}}, year = {{2004}}, } @article{1017, author = {{Kubisch, Martin and Karl, Holger and Wolisz, Adam}}, journal = {{Frequenz}}, number = {{3-4}}, pages = {{92----96}}, title = {{{A MAC protocol for wireless sensor networks with multiple selectable, fixed-orientation antennas}}}, doi = {{/10.1.1.3.3185}}, year = {{2004}}, } @article{10177, author = {{Steffen, Eckhard}}, journal = {{Discrete Mathematics}}, pages = {{191 -- 214}}, title = {{{Measurements of edge-uncolorability}}}, volume = {{280}}, year = {{2004}}, } @article{10178, author = {{Grünewald, Stefan and Steffen, Eckhard}}, journal = {{J. Graph Theory}}, pages = {{113 --118}}, title = {{{Independent Sets and 2-factors in edge-chromatic critical graphs}}}, volume = {{45}}, year = {{2004}}, } @inproceedings{1019, author = {{Gross, James and Karl, Holger and Wolisz, Adam}}, booktitle = {{2nd International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks 2004 (WiOpt 2004)}}, title = {{{Throughput optimization of dynamic OFDM-FDMA systems with inband signaling}}}, year = {{2004}}, } @inproceedings{13618, author = {{Walder, Herbert and Platzner, Marco}}, booktitle = {{Proceedings of the 14th International Conference on Field Programmable Logic and Applications (FPL)}}, isbn = {{9783540229896}}, issn = {{0302-9743}}, pages = {{831--835}}, publisher = {{Springer}}, title = {{{A Runtime Environment for Reconfigurable Hardware Operating Systems}}}, doi = {{10.1007/978-3-540-30117-2_84}}, year = {{2004}}, } @inproceedings{13619, author = {{Walder, Hebert and Nobs, Samuel and Platzner, Marco}}, booktitle = {{Proceedings of the 4th International Conference on Engineering of Reconfigurable Systems and Algorithms (ERSA)}}, publisher = {{CSREA Press}}, title = {{{XF-BOARD: A Prototyping Platform for Reconfigurable Hardware Operating Systems}}}, year = {{2004}}, } @inproceedings{13620, author = {{Dyer, Matthias and Platzner, Marco and Thiele, Lothar}}, booktitle = {{Proceedings 12th Annual IEEE Symposium on Field-Programmable Custom Computing Machines (FCCM)}}, isbn = {{0769522300}}, publisher = {{IEEE CS Press}}, title = {{{Efficient Execution of Process Networks on a Reconfigurable Hardware Virtual Machine}}}, doi = {{10.1109/fccm.2004.31}}, year = {{2004}}, } @article{13710, author = {{Ohtake, Akihiro and Kocán, Pavel and Seino, Kaori and Schmidt, Wolf Gero and Koguchi, Nobuyuki}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, pages = {{266101}}, title = {{{Ga-Rich Limit of Surface Reconstructions on GaAs(001): Atomic Structure of the(4×6)Phase}}}, doi = {{10.1103/physrevlett.93.266101}}, volume = {{93}}, year = {{2004}}, } @article{13711, author = {{Seino, K. and Schmidt, Wolf Gero}}, issn = {{0039-6028}}, journal = {{Surface Science}}, number = {{157}}, pages = {{157--160}}, title = {{{H2O on Si(001): surface optical anisotropy from first-principles calculations}}}, doi = {{10.1016/j.susc.2004.08.012}}, volume = {{571}}, year = {{2004}}, } @article{13712, author = {{Schmidt, Wolf Gero and Fuchs, F and Hermann, A and Seino, K and Bechstedt, F and Paßmann, R and Wahl, M and Gensch, M and Hinrichs, K and Esser, N and Wang, S and Lu, W and Bernholc, J}}, issn = {{0953-8984}}, journal = {{Journal of Physics: Condensed Matter}}, pages = {{S4323--S4334}}, title = {{{Oxidation- and organic-molecule-induced changes of the Si surface optical anisotropy:ab initiopredictions}}}, doi = {{10.1088/0953-8984/16/39/007}}, volume = {{16}}, year = {{2004}}, } @article{13713, author = {{Palummo, M and Pulci, O and Sole, R Del and Marini, A and Hahn, P and Schmidt, Wolf Gero and Bechstedt, F}}, issn = {{0953-8984}}, journal = {{Journal of Physics: Condensed Matter}}, pages = {{S4313--S4322}}, title = {{{The Bethe–Salpeter equation: a first-principles approach for calculating surface optical spectra}}}, doi = {{10.1088/0953-8984/16/39/006}}, volume = {{16}}, year = {{2004}}, } @article{13715, author = {{Preuss, M and Schmidt, Wolf Gero and Seino, K and Bechstedt, F}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, pages = {{155--161}}, title = {{{Methylchloride adsorbed on Si(001): an ab initio study}}}, doi = {{10.1016/j.apsusc.2004.05.041}}, volume = {{234}}, year = {{2004}}, }