@inproceedings{9521, author = {{Littmann, Walter and Hemsel, Tobias and Wallaschek, Jörg}}, booktitle = {{Proceedings of the 18th International Congress on Acoustics}}, pages = {{2889--2892}}, title = {{{Design criteria for piezoelectric transformers}}}, volume = {{4}}, year = {{2004}}, } @inproceedings{9522, author = {{Mracek, Maik and Wallaschek, Jörg and Hemsel, Tobias}}, booktitle = {{Proceedings of the 18th International Congress on Acoustics}}, pages = {{417--420}}, title = {{{Self configuration of miniature ultrasonic linear motors}}}, year = {{2004}}, } @inproceedings{9523, abstract = {{During operation, the rotating blades of a gas turbine are subjected to centrifugal forces as well as fluctuating gas forces, resulting in blade vibrations. In addition to material damping, aerodynamical and blade root damping, underplatform dampers are widely used to increase the amount of damping and to decrease blade vibration amplitudes. The friction forces generated by the relative displacements between the underplatform damper and the blade platforms provide a significant amount of energy dissipation. In practice, a number of different underplatform damper designs are applied. Basically, these are wedge dampers with flat contact areas, cylindrical dampers with curved surfaces or asymmetrical dampers with both flat contact surfaces on one side and curved contact surfaces on the other. The latter damper type combines the advantages of both the wedge and the cylindrical damper by preventing the damper from pure rolling on the one hand as it has been observed for cylindrical dampers and on the other hand, avoiding a diverged plane area contact in case of a wedge damper, causing a damper lift-off. This paper will focus on the investigation of cylindrical and asymmetrical underplatform dampers. A comparison between measurements of rotating assemblies in Siemens PG gas turbines (V84.2, V64.3A and V94.3A(2)) under test and real operating conditions with cylindrical and asymmetrical underplatform dampers and the predictions of the developed theoretical model are presented. Special attention is paid to the frequency shift due to the application of an underplatform damper, since in particular for stationary gas turbines, in addition to the amplitude reduction, the accurate prediction of the resonance frequency is of major interest. Copyright {\copyright} 2004 by ASME}}, author = {{Panning, Lars and Popp, Karl and Sextro, Walter and Götting, Florian}}, booktitle = {{Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air}}, keywords = {{Dampers, Gas turbines}}, number = {{GT2004-53316}}, pages = {{269--280}}, title = {{{Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application}}}, doi = {{10.1115/GT2004-53316}}, volume = {{6}}, year = {{2004}}, } @inproceedings{9524, author = {{Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}}, booktitle = {{Proceedings of the 18th International Congress on Acoustics, ICA}}, pages = {{4--9}}, title = {{{Model-based Diagnosis for Sandwiched Ultrasonic Transducers}}}, year = {{2004}}, } @inproceedings{8298, author = {{Krauter, Stefan}}, booktitle = {{Proceedings of the International Seminar on Hydrogen Technologies, Buenos Aires (Argentina), 7.–9. September 2004}}, title = {{{Activities concerning the Set-up of an International University for Renewable Energy}}}, year = {{2004}}, } @inproceedings{855, author = {{Marie Feeney, Laura and Hollos, Daniel and Kubisch, Martin and Mengesha, Seble and Karl, Holger}}, booktitle = {{NETWORKING 2004, Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication, Third International IFIP-TC6 Networking Conference, Athens, Greece, May 9-14, 2004, Proceedings}}, pages = {{1312----1317}}, title = {{{A Geometric Derivation of the Probability of Finding a Relay in Multi-rate Networks}}}, doi = {{10.1007/978-3-540-24693-0_112}}, year = {{2004}}, } @proceedings{859, editor = {{Karl, Holger and Willig, Andreas and Wolisz, Adam}}, isbn = {{3-540-20825-9}}, publisher = {{First European Workshop, {EWSN} 2004, Berlin, Germany, January 19-21, 2004, Proceedings}}, title = {{{Wireless Sensor Networks}}}, doi = {{10.1007/b94854}}, year = {{2004}}, } @inproceedings{4280, abstract = {{Theoretically and experimentally, we investigate temporal phase evolution during Rabi-flopping on the A-exciton resonance in CdSe using a novel fast-scanning XFROG method and observe phase changes smaller than π/2 compared to the slightly-chirped input pulse.}}, author = {{Höner zu Siederdissen, Tilman and Nielsen, Nils Christian. and Kuhl, Jürgen and Förstner, Jens and Knorr, Andreas and Giessen, Harald}}, booktitle = {{International Quantum Electronics Conference and Photonic Applications Systems Technologies}}, isbn = {{1-55752-770-9}}, keywords = {{tet_topic_qd}}, location = {{San Francisco, California (USA)}}, publisher = {{OSA}}, title = {{{Temporal phase evolution during excitonic Rabi flopping in semiconductors}}}, doi = {{10.1364/iqec.2004.imb3}}, year = {{2004}}, } @inproceedings{4281, abstract = {{The coupled spatiotemporal characteristics of subpicosecond pulses propagating in the nonlinear defocusing regime near the band edge of bulk GaAs are investigated experimentally and theoretically. We demonstrate pulse compression both in time and transverse space.}}, author = {{Nielsen, Nils C. and Kuhl, Jürgen and Schaarschmidt, Martin and Förstner, Jens and Knorr, Andreas and Koch, Stephan W. and Giessen, Harald }}, booktitle = {{Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies}}, isbn = {{1-55752-770-9}}, keywords = {{tet_topic_polariton}}, location = {{San Francisco, California (USA)}}, publisher = {{Technical Digest (CD) (Optical Society of America, 2004)}}, title = {{{Temporal and spatial compression of near-resonant pulses in a nonlinear defocusing semiconductor }}}, year = {{2004}}, } @inbook{33829, author = {{Krupp, Alexander and Müller, Wolfgang and Oliver, Ian}}, booktitle = {{Best of FDL'03}}, editor = {{Grimm, Ch.}}, isbn = {{978-1-4020-7991-7}}, pages = {{301--314}}, publisher = {{Kluwer}}, title = {{{Combining Formal Refinement and Model Checking for Analysis of Realtime Systems}}}, year = {{2004}}, } @inproceedings{33881, author = {{Tröster, Thomas and Rostek, W.}}, booktitle = {{Neuere Entwicklungen in der Blechumformung : [Vortragstexte zur Veranstaltung Internationale Konferenz "Neuere Entwicklungen in der Blechumformung" in Fellbach}}, editor = {{Tröster, Thomas and Rostek, W.}}, location = {{Fellbach}}, number = {{2004}}, pages = {{51--66}}, title = {{{Innovative Warmumformung}}}, year = {{2004}}, } @misc{18802, author = {{Peckhaus, Volker}}, booktitle = {{Mathematical Reviews, MR2014619 (2004h:03007)}}, title = {{{Seuren, P.A.M., The Logic of Thinking, Koninklijke Nederlandse Akademie van Wetenschappen: Amsterdam 2002 (Mededelingen van de Afdeling Letterkunde, Niewe Reeks, Deel 65, no. 9)}}}, year = {{2004}}, } @phdthesis{40045, author = {{Jonas-Ahrend, Gabriela}}, isbn = {{978-3-8325-0576-9}}, publisher = {{Logos}}, title = {{{Physiklehrervorstellungen zum Experiment im Physikunterricht}}}, year = {{2004}}, } @article{28778, author = {{Mahnken, Rolf}}, issn = {{0045-7825}}, journal = {{Computer Methods in Applied Mechanics and Engineering}}, pages = {{3689--3709}}, title = {{{Void growth in finite deformation elasto-plasticity due to hydrostatic stress states}}}, doi = {{10.1016/j.cma.2003.09.032}}, year = {{2004}}, } @article{28780, author = {{Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{225--226}}, title = {{{Stress mode dependent weighting functions for simulation of asymmetric creep effects}}}, doi = {{10.1002/pamm.200410094}}, year = {{2004}}, } @article{43650, author = {{Schroeter-Wittke, Harald}}, journal = {{Zeitschrift für Gottesdienst und Predigt}}, number = {{3}}, pages = {{46--47}}, title = {{{9. Sonntag nach Trinitatis. Phil 3,7-11(12-14): Vergessen}}}, volume = {{22}}, year = {{2004}}, } @inproceedings{44122, abstract = {{We demonstrate that interference of optical excitations of regularly arranged metallic nanodots on a waveguide shows spectral signatures of Fano resonances. The reason is coupling of localized particle plasmons and waveguide modes with different electronic continua.}}, author = {{Meier, Torsten and Giessen, H. and Linden, S. and Christ, A. and Kuhl, J. and Nau, D. and Thomas, P. and Koch, S.W.}}, booktitle = {{Fano resonances in metallic photonic crystals}}, isbn = {{1-55752-770-9}}, location = {{San Francisco, California United States}}, publisher = {{Optical Society of America}}, title = {{{Fano resonances in metallic photonic crystals}}}, doi = {{10.1364/IQEC.2004.IFC5}}, year = {{2004}}, } @inproceedings{44123, abstract = {{An excitonic blue-shift is observed when a GaAs/AlGaAs superlattice is irradiated with a strong THz field. This observation is compared with a microscopic calculation, and is consistent with the onset of dynamical localization.}}, author = {{Meier, Torsten and Koch, M. and Ciulin, V. and Carter, S.G. and Sherwin, M.S. and Koch, S.W. and Zide, J. and Driscoll, D. and Gossard, A.C.}}, booktitle = {{International Quantum Electronics Conference}}, isbn = {{1-55752-770-9}}, location = {{San Francisco, California United States}}, title = {{{Onset of Dynamical Localization in a Semiconductor Superlattice}}}, doi = {{10.1364/IQEC.2004.IMO3}}, year = {{2004}}, } @article{44355, author = {{Burban, Igor and Drozd, Yu.}}, journal = {{Duke Mathematical Journal}}, number = {{2}}, pages = {{189–229}}, title = {{{Coherent sheaves on rational curves with simple double points and transversal intersections}}}, doi = {{10.1215/S0012-7094-04-12121-9}}, volume = {{121}}, year = {{2004}}, } @article{64707, author = {{Bertram, W. and Glöckner, Helge and Neeb, K.-H.}}, issn = {{0723-0869}}, journal = {{Expositiones Mathematicae}}, keywords = {{58C20, 22E65, 26E15, 26E20, 26E30}}, number = {{3}}, pages = {{213–282}}, title = {{{Differential calculus over general base fields and rings.}}}, doi = {{10.1016/S0723-0869(04)80006-9}}, volume = {{22}}, year = {{2004}}, }