@inproceedings{40900, abstract = {{In this paper we describe a beamforming algorithm based on widely-linear rather than linear data models. Initially, we develop this beamformer by generalizing the Capon (MVDR) optimization problem. That is, if the objective is to minimize output power while maintaining a specified directional gain, then we show that the output power of the widely-linear beamformer is less than or equal to the output power of the Capon (MVDR) beamformer. This result is valid regardless of the “true” distribution of the data. We also derive the widely-linear beamformer by considering beamforming to be an estimation problem. Linear models assume that the composite covariance matrix formed from the real and imaginary parts of the array-snapshot has a particular structure. This structure is often summarized by stating that the covariance formed from the array snapshot and its transpose (not Hermitian transpose) is zero. We could also call these data “proper” Gaussian vectors. The beamformers in this paper are appropriate for situations in which these implicit assumptions are violated.}}, author = {{McWhorter, Todd and Schreier, Peter J.}}, booktitle = {{Proc. 37th\ Asilomar Conf.\ Signals Syst.\ Computers}}, pages = {{753–759}}, title = {{{Widely-linear beamforming}}}, doi = {{10.1109/ACSSC.2003.1292015}}, volume = {{1}}, year = {{2003}}, } @article{43284, abstract = {{The quantum dynamics of an ensemble of interacting electrons in an array of random scatterers is treated using a new numerical approach for the calculation of average values of quantum operators and time correlation functions in the Wigner representation. This approach combines both molecular dynamics and Monte Carlo methods and computes numerical traces and spectra of the relevant dynamical quantities such as momentum–momentum correlation functions and spatial dispersions. Considering, as an application, a system with fixed scatterers, the results clearly demonstrate that the many-particle interaction between the electrons can lead to an enhancement of the conductivity at intermediate densities.}}, author = {{Meier, Torsten and Filinov, V.S. and Thomas, P. and Varga, I. and Bonitz, M. and Fortov, V.E and Koch, S.W.}}, journal = {{Journal of Physics A: Mathematical and General}}, number = {{22}}, pages = {{5905--5911}}, publisher = {{IOP Publishing}}, title = {{{Electronic transport in a one-dimensional random array of scatterers}}}, doi = {{10.1088/0305-4470/36/22/311}}, volume = {{36}}, year = {{2003}}, } @inproceedings{56567, author = {{Brandt, Sebastian and Turhan, Anni-Yasmin and Küsters, Ralf}}, booktitle = {{Logic for Programming, Artificial Intelligence, and Reasoning, 10th International Conference, LPAR 2003, Almaty, Kazakhstan, September 22-26, 2003, Proceedings}}, editor = {{Vardi, Moshe Y. and Voronkov, Andrei}}, pages = {{122–136}}, publisher = {{Springer}}, title = {{{Extensions of Non-standard Inferences to Descriptions Logics with Transitive Roles}}}, doi = {{10.1007/978-3-540-39813-4_8}}, volume = {{2850}}, year = {{2003}}, } @inproceedings{15165, author = {{Schwerdtfeger, Björn and Goetz, Frank and Domik, Gitta}}, title = {{{3D interaktives Baukastensystem unter Verwendung von Augmented Reality Techniken}}}, year = {{2003}}, } @inproceedings{19873, abstract = {{We present a new and easy to use framework for navigating through scenes of arbitrary complexity and topology. In the preprocessing, images for discrete viewpoints and viewing directions are rendered and stored on an external volume. During navigation each image can be displayed within a very short time by loading it from the volume. For acceleration, our prefetching strategy loads possibly needed images for the next few frames if the viewer takes a break. The measurements show that we achieve interactive frame rates, whereby the difference between the minimal and maximal display time is very small. Our system works well with scenes modelled by polygons, but also digital photos can easily be used for describing a 3D scene.}}, author = {{Klein, Jan and Krokowski, Jens and Cuntz, Nicolas}}, booktitle = {{Proc. of 4. GI-Informatiktage}}, pages = {{224--229}}, title = {{{Realtime Navigation in Highly Complex 3D-Scenes Using JPEG Compression}}}, year = {{2002}}, } @inproceedings{2426, author = {{P. Miller, Barton and Labarta, Jesús and Schintke, Florian and Simon, Jens}}, booktitle = {{Proc. European Conf. on Parallel Processing (Euro-Par)}}, isbn = {{978-3-540-45706-0}}, pages = {{131}}, publisher = {{Springer}}, title = {{{Performance Evaluation, Analysis and Optimization}}}, doi = {{10.1007/3-540-45706-2_15}}, volume = {{2400}}, year = {{2002}}, } @inproceedings{3243, author = {{Wehrheim, Heike}}, booktitle = {{Formal Methods for Open Object-Based Distributed Systems V, {IFIP} {TC6/WG6.1} Fifth International Conference on Formal Methods for Open Object-Based Distributed Systems {(FMOODS} 2002), March 20-22, 2002, Enschede, The Netherlands}}, editor = {{Jacobs, Bart and Rensink, Arend}}, pages = {{79----93}}, title = {{{Checking Behavioural Subtypes via Refinement}}}, year = {{2002}}, } @article{27015, author = {{Toeller, M. and Buyken, Anette and Heitkamp, G. and Brämswig, S. and Mann, J. and Milne, R. and Gries, F. A. and Keen, H.}}, issn = {{0012-186X}}, journal = {{Diabetologia}}, pages = {{1219--1226}}, title = {{{Protein intake and urinary albumin excretion rates in the EURODIAB IDDM Complications Study}}}, doi = {{10.1007/s001250050810}}, year = {{2002}}, } @article{27760, author = {{Buyken, Anette and Toeller, M. and Heitkamp, G. and Vitelli, F. and Stehle, P. and Scherbaum, W. A. and Fuller, J. H.}}, issn = {{0012-186X}}, journal = {{Diabetologia}}, pages = {{882--890}}, title = {{{Relation of fibre intake to HbA 1c and the prevalence of severe ketoacidosis and severe hypoglycaemia}}}, doi = {{10.1007/s001250051003}}, year = {{2002}}, } @article{27761, author = {{Buyken, Anette and Toeller, M. and Heitkamp, G. and Irsigler, K. and Holler, C. and Santeusanio, F. and Stehle, P. and Fuller, J. H. and Group, the Eurodiab Iddm Complications Stu}}, issn = {{0742-3071}}, journal = {{Diabetic Medicine}}, pages = {{351--359}}, title = {{{Carbohydrate sources and glycaemic control in Type 1 diabetes mellitus}}}, doi = {{10.1046/j.1464-5491.2000.00283.x}}, year = {{2002}}, } @article{27762, author = {{Kratz, Mario and von Eckardstein, Arnold and Fobker, Manfred and Buyken, Anette and Posny, Nicole and Schulte, Helmut and Assmann, Gerd and Wahrburg, Ursel}}, issn = {{0021-972X}}, journal = {{The Journal of Clinical Endocrinology & Metabolism}}, pages = {{5008--5014}}, title = {{{The Impact of Dietary Fat Composition on Serum Leptin Concentrations in Healthy Nonobese Men and Women}}}, doi = {{10.1210/jc.2002-020496}}, year = {{2002}}, } @article{27788, author = {{Toeller, M and Buyken, Anette}}, issn = {{1460-2385}}, journal = {{Nephrology Dialysis Transplantation}}, pages = {{1926--1927}}, title = {{{Protein intake - new evidence for its role in diabetic nephropathy}}}, doi = {{10.1093/ndt/13.8.1926}}, year = {{2002}}, } @article{27930, author = {{Schlegel-Matthies, Kirsten}}, journal = {{Haushalt & Bildung}}, pages = {{24--33}}, title = {{{Das Modell der Salutogenese als Handlungsanleitung für haushaltsbezogene Bildung? Fragen und Folgerungen}}}, volume = {{3}}, year = {{2002}}, } @phdthesis{18169, abstract = {{Die Implementierung von Algorithmen zur Lösung geometrischer Probleme im Euklidischen Raum (z.B. Berechnung der konvexen Hülle oder des Durchschnitts zweier Polyeder) stellt sich oftmals als hochgradig nichttrivial heraus. Ob und unter welchen Voraussetzungen die verursachenden numerischen Instabilitäten überhaupt ini den Griff zu kriegen oder vielmehr dem Problem inhärent sind, untersucht diese Arbeit in einem auf Turing zurückgehenden Rechenmodell. Im Gegensatz zu algebraischen Ansätzen geht jenes nicht von der Verfügbarkeit exakter Tests auf z.B. Gleichheit reeller Zahlen aus, sondern berücksichtigt die auf Digitalcomputern tatsächlich realisierbare Approximation durch rationale Zahlen. In diesem Rahmen werden beweisbar stabile Algorithmen zum Lösen linearer Gleichungssysteme, zur Matrix-Diagonalisierung und zur linearen wie nichtlinearen Optimierung präsentiert. Als wichtiges technisches Hilfsmittel dient ein neuer Berechenbarkeitsbegriff für reguläre unendliche Mengen reller Zahlen, der sich aus dem systematischen Vergleich verschiedener der Literatur entnommener ad-hoc Ansätze ergibt.}}, author = {{Ziegler, Martin}}, isbn = {{3-935433-24-7}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Zur Berechenbarkeit reeller geometrischer Probleme}}}, volume = {{115}}, year = {{2002}}, } @inproceedings{8928, author = {{Panning, Lars and Sextro, Walter and Popp, Karl}}, booktitle = {{Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air}}, number = {{GT- 2002-30429}}, title = {{{Optimization of the Contact Geometry between Turbine Blades and Underplatform Dampers with respect to Friction Damping}}}, year = {{2002}}, } @inproceedings{8146, author = {{Rosa, L. P. and Krauter, Stefan and Nascimento, J. L. and Sampaio, M. and Silva, N. F. and Araújo, M. P. and Petersen, R. C.}}, booktitle = {{IX Congresso Brasileiro de Energia, Rio de Janeiro (Brasilien), 21.–22. Mai 2002, Band 4, S. 1780–1785.}}, title = {{{O Laboratório de Fontes Alternativas de Energia da UFRJ – LAFAE (Labor für alternative Energiequellen an der UFRJ)}}}, year = {{2002}}, } @inproceedings{5620, abstract = {{Bei der Online-Marktforschung lässt sich mit Hilfe virtueller 3D-Welten das Konsumentenverhalten beobachten. Da die Struktur der dabei anfallenden Daten multidimensional ist und die marktforschungsrelevanten Anfragen eine hohe OLAP-Affinität aufweisen, wurde hierzu im Rahmen des Forschungsprojekts Benevit ein Data Warehouse konzipiert und realisiert. Im Rahmen einer Standardisierung der Protokollierung von Konsumentenaktivitäten und deren prototypischen Realisierung erwies sich der Data Warehouse/OLAP-Ansatz zur Speicherung, Analyse und Präsentation der Marktforschungsdaten als adäquates Instrumentenbündel.}}, author = {{Schryen, Guido and Schoenen, Markus}}, booktitle = {{Data Warehousing 2002}}, pages = {{103--119}}, title = {{{Data Warehouse in der Marktforschung - Analyse von Benutzeraktivitäten in virtuellen Welten}}}, year = {{2002}}, } @inproceedings{16888, author = {{Goetz, F. and Domik, Gitta}}, booktitle = {{Informatiktage 2002}}, title = {{{x3Dogl: ein auf XML basierendes Web3D-System zur Darstellung interaktiver 3D-Szenen }}}, year = {{2002}}, } @article{27931, author = {{Bigga, Regine and Schack, Pirjo Susanne}}, journal = {{Haushalt & Bildung}}, number = {{4}}, pages = {{41--52}}, title = {{{Darstellung und Bewertung von Online und Offline Medien unter dem Gesichtspunkt nachhaltiger Ernährungsstile. Lehren und Lernen im haushaltsbezogenen Unterricht.}}}, volume = {{79}}, year = {{2002}}, } @inproceedings{39370, abstract = {{Within this paper we propose architecture ideas of a distributed Video on Demand network which base on peer to peer technology. Each peer offers video streams to other peers and may receive a video stream from another peer simultaneously. This results in an optimization problem depending on different factors which we approximate with the help of an simulation environment. Our approach bases on a peer to peer framework by Sun called Project JXTA which provides a set of protocols for P2P applications.}}, author = {{Loeser, Chris and Altenbernd, Peter and Ditze, Michael and Müller, Wolfgang}}, booktitle = {{Proceedings of the Intl. Workshop on Real-Time LANs in the Internet Age (RTLIA 2002)}}, title = {{{Distributed Video-on-Demand Services on Peer to Peer Basis}}}, year = {{2002}}, }