@inproceedings{39582, author = {{Müller, Wolfgang and Kleinjohann, Bernd}}, booktitle = {{Proceedings of the 2nd EXPRESS User's Group Conference}}, title = {{{The EXPRESS Information Modeling Workbench - A New Approach to Graphical Design Environments}}}, year = {{1992}}, } @article{38499, author = {{MEISSNER, E and Noé, Reinhold and BORCHERT, B and RODLER, H}}, issn = {{0013-5194}}, journal = {{ELECTRONICS LETTERS}}, number = {{25}}, pages = {{2266--2268}}, title = {{{DIRECT MODULATION 565 MBIT/S OPTICAL PSK HETERODYNE SYSTEM WITH SOLITARY SL-QW-DFB LASERS USING NOVEL SUPPRESSION OF PHASE-TRANSITION PERIODS IN CARRIER RECOVERY}}}, doi = {{10.1049/el:19921458}}, volume = {{28}}, year = {{1992}}, } @article{38495, author = {{Noé, Reinhold and RODLER, H and EBBERG, A and MEISSNER, E and BODLAJ, V and DROGEMULLER, K and WITTMANN, J}}, issn = {{0013-5194}}, journal = {{ELECTRONICS LETTERS}}, number = {{1}}, pages = {{14--16}}, title = {{{FULLY ENGINEERED COHERENT MULTICHANNEL TRANSMITTERS AND RECEIVERS WITH LOW-COST POTENTIAL}}}, doi = {{10.1049/el:19920009}}, volume = {{28}}, year = {{1992}}, } @article{38492, author = {{Noé, Reinhold and DROGEMULLER, K}}, issn = {{1041-1135}}, journal = {{IEEE PHOTONICS TECHNOLOGY LETTERS}}, number = {{5}}, pages = {{505--506}}, title = {{{ACCURATE AND SIMPLE OPTICAL FREQUENCY STABILIZATION FOR A COHERENT MULTICHANNEL SYSTEM}}}, doi = {{10.1109/68.136502}}, volume = {{4}}, year = {{1992}}, } @article{40009, author = {{Kitzerow, Heinz-Siegfried and Crooker, P. P. and Heppke, G.}}, issn = {{0267-8292}}, journal = {{Liquid Crystals}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{1}}, pages = {{49--58}}, publisher = {{Informa UK Limited}}, title = {{{Chromaticity of polymer-dispersed cholesteric liquid crystals}}}, doi = {{10.1080/02678299208029037}}, volume = {{12}}, year = {{1992}}, } @article{40013, author = {{Kitzerow, Heinz-Siegfried and Crooker, P. P.}}, issn = {{0267-8292}}, journal = {{Liquid Crystals}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{4}}, pages = {{561--568}}, publisher = {{Informa UK Limited}}, title = {{{Behaviour of polymer dispersed cholesteric droplets with negative dielectric anisotropy in electric fields}}}, doi = {{10.1080/02678299208029010}}, volume = {{11}}, year = {{1992}}, } @article{40008, author = {{Kitzerow, Heinz-Siegfried and Xu, F. and Crooker, P. P.}}, issn = {{0267-8292}}, journal = {{Liquid Crystals}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{6}}, pages = {{1019--1024}}, publisher = {{Informa UK Limited}}, title = {{{Microscopic observations of axial and radial nematic droplets for a dual-frequency addressable liquid crystal}}}, doi = {{10.1080/02678299208032817}}, volume = {{12}}, year = {{1992}}, } @article{38493, author = {{Noé, Reinhold and MEISSNER, E and BORCHERT, B and RODLER, H}}, issn = {{1041-1135}}, journal = {{IEEE PHOTONICS TECHNOLOGY LETTERS}}, number = {{10}}, pages = {{1151--1154}}, title = {{{DIRECT MODULATION 565 MB/S DPSK EXPERIMENT WITH 62.3 DB LOSS SPAN AND ENDLESS POLARIZATION CONTROL}}}, doi = {{10.1109/68.163762}}, volume = {{4}}, year = {{1992}}, } @article{40075, author = {{Kitzerow, Heinz-Siegfried and Crooker, P. P. and Rand, J. and Xu, J. and Heppke, G.}}, issn = {{1155-4312}}, journal = {{Journal de Physique II}}, keywords = {{Physics and Astronomy (miscellaneous), General Engineering, Atomic and Molecular Physics, and Optics}}, number = {{3}}, pages = {{279--284}}, publisher = {{EDP Sciences}}, title = {{{Electrostriction dynamics of blue phase II crystallites}}}, doi = {{10.1051/jp2:1992132}}, volume = {{2}}, year = {{1992}}, } @article{40077, author = {{Dolganov, V. K. and Heppke, G. and Kitzerow, Heinz-Siegfried}}, issn = {{1155-4312}}, journal = {{Journal de Physique II}}, keywords = {{Physics and Astronomy (miscellaneous), General Engineering, Atomic and Molecular Physics, and Optics}}, number = {{10}}, pages = {{1803--1809}}, publisher = {{EDP Sciences}}, title = {{{Dynamic response of a blue phase to an applied field}}}, doi = {{10.1051/jp2:1992236}}, volume = {{2}}, year = {{1992}}, } @article{40078, author = {{Kitzerow, Heinz-Siegfried and Rand, J. and Crooker, P. P.}}, issn = {{1155-4312}}, journal = {{Journal de Physique II}}, keywords = {{Physics and Astronomy (miscellaneous), General Engineering, Atomic and Molecular Physics, and Optics}}, number = {{2}}, pages = {{227--234}}, publisher = {{EDP Sciences}}, title = {{{Dynamics of polymer-dispersed cholesteric liquid crystals}}}, doi = {{10.1051/jp2:1992126}}, volume = {{2}}, year = {{1992}}, } @article{40331, author = {{Xu, F. and Kitzerow, Heinz-Siegfried and Crooker, P. P.}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{10}}, pages = {{6535--6540}}, publisher = {{American Physical Society (APS)}}, title = {{{Electric-field effects on nematic droplets with negative dielectric anisotropy}}}, doi = {{10.1103/physreva.46.6535}}, volume = {{46}}, year = {{1992}}, } @article{40329, author = {{Kitzerow, Heinz-Siegfried and Molsen, Henning and Heppke, Gerd}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{25}}, pages = {{3093--3095}}, publisher = {{AIP Publishing}}, title = {{{Linear electro‐optic effects in polymer‐dispersed ferroelectric liquid crystals}}}, doi = {{10.1063/1.106762}}, volume = {{60}}, year = {{1992}}, } @article{40330, author = {{Kitzerow, Heinz-Siegfried and Molsen, Henning and Heppke, Gerd}}, issn = {{1042-7147}}, journal = {{Polymers for Advanced Technologies}}, keywords = {{Polymers and Plastics}}, number = {{5}}, pages = {{231--235}}, publisher = {{Wiley}}, title = {{{Helical unwinding in polymer-dispersed ferroelectric liquid crystals}}}, doi = {{10.1002/pat.1992.220030506}}, volume = {{3}}, year = {{1992}}, } @article{40328, abstract = {{ We investigated the switching behavior of the well-known antiferroelectric liquid crystal (R)-4-(1-methylheptyloxycarbonyl)phenyl-4'-octyloxybiphenyl-4-carboxylate (MHPOBC), embedded in a polymer matrix. The alignment of the liquid crystal in the UV-cured adhesive was controlled by mechanical shear during the polymerization-induced phase separation. Multistable switching with time constants down to 150 µs indicates that antiferroelectric PDLC devices are promissing for electrooptic application as flexible displays. }}, author = {{Molsen, Henning and Kitzerow, Heinz-Siegfried and Heppke, Gerd }}, issn = {{0021-4922}}, journal = {{Japanese Journal of Applied Physics}}, keywords = {{General Physics and Astronomy, General Engineering}}, number = {{8A}}, publisher = {{IOP Publishing}}, title = {{{Antiferroelectric Switching in Polymer-Dispersed Liquid Crystals}}}, doi = {{10.1143/jjap.31.l1083}}, volume = {{31}}, year = {{1992}}, } @article{40515, author = {{Molsen, H. and Kitzerow, Heinz-Siegfried and Heppke, G.}}, journal = {{SID Digest of Technical Papers}}, pages = {{773--775}}, publisher = {{Society for Information Display (SID)}}, title = {{{Deformed-Helix Ferroelectric Effect in Polymer-Dispersed Ferroelectric Liquid Crystals}}}, volume = {{XXIII}}, year = {{1992}}, } @article{40514, author = {{Crooker, P. P. and Kitzerow, Heinz-Siegfried}}, journal = {{Condensed Matter News}}, pages = {{6--11}}, title = {{{Blue Phases}}}, volume = {{1}}, year = {{1992}}, } @article{43444, abstract = {{The authors present a detailed study of coherent tunneling oscillations of an optically excited electronic wavepacket in a semiconductor double quantum-well structure. The oscillation of the wavepacket between the two wells is traced by time-resolved pump-probe spectroscopy as well as time-resolved degenerate four-wave mixing. The experimental observations are compared with a simple theoretical model. The motion of the wave packet is studied as a function of both an external electric field and the lattice temperature. While the oscillation frequency shows the expected dependence on electric field, it increases with temperature at fixed electric field when perfectly delocalized electronic states exist at low temperature.}}, author = {{Meier, Torsten and Leo, K. and Shah, J. and Damen, T.C. and Schulze, A. and Schmitt-Rink, S. and Thomas, P. and Göbel, E.O. and Chuang, S.L. and Luo, M.S.C. and Schäfer, W. and Köhler, K. and Ganser, P.}}, issn = {{1558-1713}}, journal = {{IEEE journal of quantum electronics}}, number = {{10}}, pages = {{2498--2507}}, publisher = {{IEEE}}, title = {{{Dissipative Dynamics of an Electronic Wavepacket in a Semiconductor Double Well Potential}}}, doi = {{10.1109/3.159556}}, volume = {{28}}, year = {{1992}}, } @article{43443, abstract = {{We report the study of optical dephazing of Wannier-Stark ladder excitations in a semiconductor superlattice by means of transient degenerate four-wave mixing. We observe pronounced modulations of the signal with a time period varying linearly with the electric field. The time period is found to equal the temporal periodicity of Bloch oscillations, in agreement with theory. In addition, we find that the dephazing time decreases with increasing localization of the Wannier-Stark states, which is attributed to carrier escape out of the lowest miniband.}}, author = {{Meier, Torsten and Feldmann, J. and Leo, K. and Shah, J. and Miller, D.A.B. and Cunningham, J.E. and von Plessen, G. and Schulze, A. and Thomas, P. and Schmitt-Rink, S.}}, journal = {{Physical Review B}}, number = {{11}}, pages = {{7252--7255}}, publisher = {{American Physical Society}}, title = {{{Optical investigation of Bloch oscillations in a semiconductor superlattice}}}, doi = {{10.1103/PhysRevB.46.7252}}, volume = {{46}}, year = {{1992}}, } @article{43445, abstract = {{Femtosecond nonlinear laser spectroscopy is applied to study the dynamics of coherent optical excitations in semiconductors. In particular, excitonic excitations in quantum wells and superlattice structures are considered. Two examples demonstrate that four-wave mixing experiments with time-resolved detection of the nonlinear signal are able to distinguish between quantum beats and polarization interference.v}}, author = {{Meier, Torsten and Göbel, E.O. and Koch, M. and Feldmann, J. and von Plessen, G. and Schulze, A. and Thomas, P. and Schmitt-Rink, S. and Köhler, K. and Ploog, K.}}, journal = {{physica status solidi (b)}}, number = {{1}}, pages = {{21--30}}, title = {{{Time Resolved Four Wave Mixing in GaAs/AlAs Quantum Well Structures}}}, doi = {{10.1002/pssb.2221730103}}, volume = {{173}}, year = {{1992}}, } @inproceedings{39917, author = {{Hilleringmann, Ulrich and Adams, S and Goser, K}}, booktitle = {{Proceedings ISSSE’92}}, pages = {{304–307}}, title = {{{A Silicon Technology for Monolithic Integration of Optical Waveguides, Photodetectors and VLSI CMOS Circuits}}}, year = {{1992}}, } @inproceedings{39918, author = {{Adams, S and Hilleringmann, Ulrich and Goser, K}}, booktitle = {{EFOC LAN}}, pages = {{92–92}}, title = {{{Electrooptical coupling of waveguides and VLSI circuits integrated on one silicon chip}}}, year = {{1992}}, } @article{43483, author = {{Schroeter-Wittke, Harald}}, journal = {{Der Evangelische Erzieher}}, pages = {{426--431}}, title = {{{Michel plays Petrucciani. Oder: "So wenig sind wir auf uns selbst gestellt." Oder: Praktisch-theologische Wahr-Nehmungen in dem "Spielraum von Schnitten"}}}, volume = {{44}}, year = {{1992}}, } @inproceedings{44291, abstract = {{Summary form only given. The numerical investigations are based on a microscopic many-body theory which allows one to compute the linear and nonlinear optical properties of semiconductor superlattices in the presence of homogeneous electric fields applied in the growth direction. The THz-emission due to the field-driven dynamics of photoexcited carriers is investigated for the combined action of static and alternating fields. For a driving field it was shown within a simple model that the equations governing the intraband dynamics in the field-driven superlattice should be analogous to the ones describing the superconducting Josephson junction. The transport properties in this regime can be described by the picture of multi-photon-assisted tunneling between Wannier-Stark states.}}, author = {{Meier, Torsten and Thomas, P. and Koch, S.W.}}, booktitle = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}}, isbn = {{1-55752-576-X}}, location = {{Baltimore, MD, USA}}, pages = {{218--219}}, publisher = {{IEEE}}, title = {{{THz-emission from photoexcited semiconductor superlattices with applied ac and dc electric fields}}}, doi = {{10.1109/QELS.1999.807564}}, year = {{1992}}, } @inproceedings{44292, abstract = {{Summary form only given. Partly non-degenerate four-wave mixing is able to detect coherent coupling between excitonic resonances like e.g. light-hole and heavy-hole excitons or between an exciton and its continuum states. We apply an extension of this method, which we call selective coherent spectroscopy (SCS), to symmetrically strained (GaIn)As/Ga(PAs) multiple quantum-wells. The samples are excited simultaneously by a picosecond pulse with wavevector k/sub 1/ and a 100 fs pulse with wavevector k/sub 2/. The central wavelength of the picosecond pulse is scanned over the entire spectrum of the 100 fs pulse and the four-wave mixing signal in the direction 2k/sub 2/-k/sub 1/ is detected at a fixed energy. This scan provides an SCS spectrum.}}, author = {{Meier, Torsten and Euteneuer, A. and Finger, E. and Hofmann, M. and Stolz, W. and Thomas, P. and Koch, S.W. and Ruhle, W.W.}}, booktitle = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}}, location = {{Baltimore, MD, USA}}, pages = {{204}}, publisher = {{IEEE}}, title = {{{Distribution of exciton binding-energies in disordered semiconductor quantum-wells}}}, doi = {{10.1109/QELS.1999.807538}}, year = {{1992}}, } @inproceedings{44290, abstract = {{Summary form only given. For a proper understanding of nonlinear optical experiments in semiconductors even the low-density limit Coulomb-induced many body correlations beyond the Hartree-Fock decoupling scheme need to be considered. In the coherent X(3) limit these correlations manifest themselves in the contributions of bound and unbound two-exciton states to the optical response. The understanding of nonlinear excitonic effects in the Stark effect of semiconductors including carrier-correlations is still of fundamental interest.}}, author = {{Meier, Torsten and Sieh, C. and Koch, S.W. and Brick, P. and Hubner, M. and Ell, C. and Prineas, J. and Khitrova, G. and Gibbs, H.M.}}, booktitle = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}}, isbn = {{1-55752-576-X}}, location = {{Baltimore, MD, USA}}, pages = {{14--15}}, publisher = {{IEEE}}, title = {{{Influence of carrier-correlations on the optical Stark effect of semiconductors}}}, doi = {{10.1109/QELS.1999.807099}}, year = {{1992}}, } @inproceedings{44289, abstract = {{Recent experiments by Roskos et al. in ultrashort optical pulse excitation of biased coupled quantum wells have shown remarkable generation of terahertz electromagnetic radiation. Two different effects were identified: (i) an oscillatory field of frequency corresponding to the separation between the coupled levels in the quantum-well pair (~ 1.5 THz); and (ii) an “instantaneous” electromagnetic field pulse that appears to follow the time evolution of the exciting laser pulse. The oscillatory field is understood to be caused by the coherent oscillation of optically created electrons from one well to the other.[1] The “instantaneous” part we believe is caused by a new mechanism proposed in Ref. 2. The essence of this “instantaneous” mechanism is that electron-hole pairs are created in a biased semiconductor with a net polarization. The density of these pairs follows the light field, as does the induced polarization, hence, generating an electromagnetic source that follows the light pulse. Such mechanisms have been discussed before for photon energies below the optical bandgap energy,[3] although they have so far been difficult to observe. In our work, we have generalized and extended such effects to photon energies above the handgap energy. In this paper we will discuss both of these mechanisms as well as the fourwave-mixing (FWM) signal,[4] and show how they can be understood within one unified formalism. We will also show that the calculations agree well with the experimental results.}}, author = {{Meier, Torsten and Schulze, A. and Scmittrink, S. and Thomas, P. and Chuang, S.L.}}, booktitle = {{International Quantum Electronics Conference}}, location = {{Vienna, Austria}}, title = {{{Terahertz Electromagnetic Pulse Generation and Four-Wave Mixing in Coupled Quantum Wells}}}, year = {{1992}}, } @inproceedings{44288, abstract = {{In the presence of a homogeneous electric field, 𝐹→, each Bloch state in a crystal changes quasimomentum according to the so-called acceleration theorem Thus, in the absence of interband tunneling and scattering processes, each Bloch state moves at a constant velocity in k-space and executes a periodic motion in the reduced zone scheme by undergoing a Bragg reflection between each two traversals of the Brillouin zone.}}, author = {{Meier, Torsten and von Plessen, G. and Schulze, A. and Thomas, P.}}, booktitle = {{International Quantum Electronics Conference}}, location = {{Vienna, Austria}}, title = {{{On the Observability of Bloch Oscillations in Time-Resolved Four-Wave-Mixing}}}, year = {{1992}}, } @misc{45259, author = {{Herzig, Bardo}}, publisher = {{Universität Paderborn}}, title = {{{Entwurf einer Benutzeroberfläche für die Analyse von kontextfreien und DCG - Grammatiken und ihre didaktische Verwendung. Erste Staatsarbeit im Fach Informatik}}}, year = {{1992}}, } @inproceedings{47608, author = {{Jonas-Ahrend, Gabriela}}, location = {{San Francisco/USA}}, title = {{{Physics Education in East and West Germany}}}, year = {{1992}}, } @inbook{19432, author = {{Eke, Norbert Otto}}, booktitle = {{Die Fürstliche Bibliothek Corvey. Ihre Bedeutung für eine neue Sicht der Literatur des frühen 19. Jahrhunderts. Beiträge des 1. Internationalen Corvey-Symposions. 25.-27. Oktober 1990 in Paderborn}}, editor = {{Schöwerling, Rainer and Steinecke, Hartmut and Eke, Norbert Otto and Tiggesbäumker, Günter}}, pages = {{87--103}}, publisher = {{Fink}}, title = {{{„Wie wird künftig Meusel die hungrige Nachwelt hetzen und peinigen“. Deutsche Romane 1815-1830 in der Fürstlichen Bibliothek Corvey. Vorläufiges zum Forschungsprojekt „Der deutsche Roman 1815-1830"}}}, year = {{1992}}, } @inbook{19488, abstract = {{Angaben zur Herausgeberschaft: Hg. von Rainer Schöwerling und Hartmut Steinecke unter Mitarbeit von Norbert Otto Eke und Günter Tiggesbäumker}}, author = {{Eke, Norbert Otto}}, booktitle = {{Die Fürstliche Bibliothek Corvey. Ihre Bedeutung für eine neue Sicht der Literatur des frühen 19. Jahrhunderts. Beiträge des 1. Internationalen Corvey-Symposions. 25.-27. Oktober 1990 in Paderborn}}, editor = {{Schöwerling, Rainer and Steinecke, Hartmut and Eke, Norbert Otto and Tiggesbäumker, Günter}}, pages = {{174--181, 319--321, 398--404}}, title = {{{Diskussionsberichte zu den Sektionen 2 („Roman“) und 3 („Dramen“) sowie der Abschlußdiskussion des 1. Internationalen Corvey-Symposions}}}, year = {{1992}}, } @book{19091, abstract = {{Präzisierung der Herausgeberschaft: Hg. von Rainer Schöwerling und Hartmut Steinecke unter Mitarbeit von Norbert Otto Eke und Günter Tiggesbäumker}}, editor = {{Schöwerling, Rainer and Steinecke, Hartmut and Eke, Norbert Otto and Tiggesbäumker, Günter}}, pages = {{439}}, publisher = {{Fink}}, title = {{{Die Fürstliche Bibliothek Corvey. Ihre Bedeutung für eine neue Sicht der Literatur des frühen 19. Jahrhunderts. Beiträge des 1. Internationalen Corvey-Symposions. 25.-27. Oktober 1990 in Paderborn}}}, year = {{1992}}, } @misc{51585, author = {{Hilgert, Joachim}}, booktitle = {{JBer. DMV}}, title = {{{Fomenko, A.T. Symplectic Geometry (Gordon and Breach, 1988)}}}, volume = {{94}}, year = {{1992}}, } @article{51442, author = {{Hilgert, Joachim and Ólafsson, G.}}, journal = {{Japan. J. Math.}}, pages = {{213--290}}, title = {{{Analytic Extensions of Representations, the Solvable Case}}}, volume = {{18}}, year = {{1992}}, } @article{51443, author = {{Hilgert, Joachim}}, journal = {{Math. Zeitschrift}}, pages = {{463--466}}, title = {{{Controllability on Real Reductive Groups}}}, volume = {{209}}, year = {{1992}}, } @article{19814, author = {{Flögel, A. and Kleine Büning, H. and Lettmann, Theodor}}, issn = {{0988-3754}}, journal = {{RAIRO - Theoretical Informatics and Applications}}, pages = {{327--340}}, title = {{{On the restricted equivalence for subclasses of propositional logic}}}, doi = {{10.1051/ita/1993270403271}}, year = {{1993}}, } @techreport{2453, author = {{Simon, Jens}}, publisher = {{Paderborn Center for Parallel Computing}}, title = {{{Benutzung virtueller Topologien unter PARIX}}}, year = {{1993}}, } @techreport{2454, author = {{Röttger, Markus and Simon, Jens and Schroeder, Ulf-Peter}}, publisher = {{Paderborn Center for Parallel Computing}}, title = {{{Virtual Topology Library for PARIX}}}, year = {{1993}}, } @techreport{2455, author = {{Diekmann, Ralf and Lüling, Reinhard and Simon, Jens}}, publisher = {{Paderborn Center for Parallel Computing}}, title = {{{Problem Independent Distributed Simulated Annealing and its Applications}}}, year = {{1993}}, } @inbook{2456, author = {{Diekmann, Ralf and Simon, Jens}}, booktitle = {{Applied Simulated Annealing}}, isbn = {{978-3-642-46787-5}}, pages = {{17--44}}, publisher = {{Springer}}, title = {{{Problem Independent Distributed Simulated Annealing and its Applications}}}, doi = {{10.1007/978-3-642-46787-5_2}}, volume = {{396}}, year = {{1993}}, } @techreport{3045, author = {{Blömer, Johannes}}, publisher = {{Technical Report, Freie Universität Berlin, Fachbereich Mathematik und Informatik}}, title = {{{On Kummer theory and the number of roots of unity in radical extensions of Q}}}, year = {{1993}}, } @article{3069, author = {{Gries, Thomas and Wigger, B.}}, journal = {{Economia Internationale}}, number = {{4}}, pages = {{3--13}}, title = {{{The Dynamics of Upgrading or how to catch-up}}}, volume = {{46}}, year = {{1993}}, } @book{17302, author = {{Fuchssteiner, Benno and Wiwianka, W. and Gottheil, K. and Kemper, A. and Kluge, O. and Morisse, K. and Naundorf, H. and Oevel, Gudrun and Schulze, T.}}, publisher = {{Birkhäuser}}, title = {{{MuPAD: Multi Processing Algebra Data Tool; Benutzerhandbuch; MuPAD Version 1.1}}}, year = {{1993}}, } @inproceedings{17476, author = {{Peckhaus, Volker}}, booktitle = {{Philosophie und Logik. Frege-Kolloquien Jena 1989/1991}}, editor = {{Stelzner, Werner}}, pages = {{108--119}}, publisher = {{Walter de Gruyter}}, title = {{{Ernst Schröder und der Logizismus}}}, volume = {{3}}, year = {{1993}}, } @book{17477, editor = {{Meyer auf der Heide, Friedhelm and Monien, B. and Rosenberg, A. L.}}, isbn = {{9783540567318}}, issn = {{0302-9743}}, publisher = {{Springer}}, title = {{{Parallel Architectures and Their Efficient Use}}}, doi = {{10.1007/3-540-56731-3}}, year = {{1993}}, } @inbook{17478, author = {{Peckhaus, Volker}}, booktitle = {{Wien—Berlin—Prag. Der Aufstieg der wissenschaftlichen Philosophie. Zentenarien Rudolf Carnap–Hans Reichenbach–Edgar Zilsel}}, editor = {{Haller, Rudolf and Stadler, Friedrich}}, pages = {{362--385}}, publisher = {{Hölder-Pichler-Tempsky}}, title = {{{Kurt Grelling und der Logische Empirismus}}}, volume = {{2}}, year = {{1993}}, } @inproceedings{17479, author = {{Kastens, Uwe and Meyer auf der Heide, Friedhelm and Wachsmann, Alf and Wichmann, Friedrich}}, booktitle = {{Proc. 3rd PASA Workshop, PARS Mitteilungen}}, pages = {{50--55}}, title = {{{OCCAM-light: A Language Combining Shared Memory and Message Passing (A First Report)}}}, year = {{1993}}, } @article{19046, abstract = {{Page 4}}, author = {{Peckhaus, Volker}}, journal = {{The Mathematical Intelligencer}}, number = {{4}}, title = {{{Fotografie: Ivor Grattan-Guinness (Erlangen, 21.2.1989)}}}, volume = {{15}}, year = {{1993}}, } @book{19090, editor = {{Eke, Norbert Otto and Helmes, Günter}}, pages = {{183}}, publisher = {{Königshausen & Neumann}}, title = {{{Richard Beer-Hofmann (1866-1945). Studien zu seinem Werk}}}, year = {{1993}}, } @book{19137, author = {{Eke, Norbert Otto}}, pages = {{344}}, publisher = {{Igel}}, title = {{{Stanislaw Przybyszewski: Schnee und andere Dramen (Edition)}}}, volume = {{5}}, year = {{1993}}, } @book{19148, author = {{Eke, Norbert Otto and Oellers, Norbert and Skrodzki, Karl Jürgen and Steinecke, Hartmut}}, pages = {{VII, 655}}, publisher = {{Deuticke, Klett-Cotta}}, title = {{{Nikolaus Lenau. Werke und Briefe. Historisch-kritische Gesamtausgabe. Bd. 7. Aufzeichnungen. Vermischte Schriften. Text und Kommentar (Edition)}}}, year = {{1993}}, } @inbook{19427, author = {{Eke, Norbert Otto}}, booktitle = {{Richard Beer-Hofmann (1866-1945). Studien zu seinem Werk}}, editor = {{Eke, Norbert Otto and Helmes, Günter}}, pages = {{128--155}}, publisher = {{Königshausen & Neumann}}, title = {{{Rettung des Sinns. Jaákobs Traum und das Projekt einer Geschichtstheodizee}}}, year = {{1993}}, } @inbook{19428, author = {{Eke, Norbert Otto and Helmes, Günter}}, booktitle = {{Richard Beer-Hofmann (1866-1945). Studien zu seinem Werk}}, editor = {{Eke, Norbert Otto and Helmes, Günter}}, pages = {{7--10}}, publisher = {{Königshausen & Neumann}}, title = {{{Richard Beer-Hofmann – Zur Einführung}}}, year = {{1993}}, } @inbook{19429, author = {{Eke, Norbert Otto}}, booktitle = {{Grabbe Jahrbuch 12}}, pages = {{24--60}}, title = {{{„Freiheit ist nur in dem Reich der Träume“. Revolutionsprojektionen deutscher Dramen nach 1789. Ein historischer Aufriß (mit einem Ausblick bis zum Nachmärz)}}}, year = {{1993}}, } @article{19430, author = {{Eke, Norbert Otto}}, journal = {{Zeitschrift für Germanistik}}, number = {{H. 2}}, pages = {{295--308}}, title = {{{Eine Gesamtbibliographie des deutschen Romans 1815-1830. Anmerkungen zum Problemfeld von Bibliographie und Historiographie}}}, volume = {{NF III}}, year = {{1993}}, } @inbook{19431, author = {{Eke, Norbert Otto}}, booktitle = {{Dichter und ihre Nation}}, editor = {{Scheuer, Helmut}}, pages = {{490--506}}, publisher = {{Suhrkamp}}, title = {{{„Deutschland ortlos“. Dekonstruktionen des Nationalen bei Heiner Müller}}}, year = {{1993}}, } @article{23365, author = {{Trächtler, Ansgar}}, journal = {{Process Tomography - a Strategy for Industrial Exploitation}}, pages = {{34--37,}}, title = {{{Use of Symmetries in Tomography}}}, year = {{1993}}, } @article{23366, author = {{Trächtler, Ansgar}}, journal = {{at-Automatisierungstechnik}}, pages = {{51--57,}}, title = {{{Vollständige Modale Synthese stationär unstörbarer und stationär perfekter Zustandsregelungen}}}, volume = {{41}}, year = {{1993}}, } @inproceedings{7826, author = {{Engels, Gregor and Verrijn-Stuart, A.A.}}, booktitle = {{Fortschritt-Berichte VDI}}, number = {{251}}, pages = {{45--53}}, publisher = {{VDI Verlag}}, title = {{{Integrationsaspekte bei verteilter Software-Entwicklung}}}, year = {{1993}}, } @inproceedings{8089, author = {{Krauter, Stefan and Hanitsch, Rolf}}, booktitle = {{Proceedings of the Cairo International Conference of Renewable Energy Sources, Kairo (Ägypten), 30. Dezember 1992 – 2. Januar 1993}}, title = {{{Calculating the Influence of Skylight-Polarization on the Transmission of Encapsulations of PV-Modules}}}, year = {{1993}}, } @inproceedings{8090, author = {{Krauter, Stefan and Hanitsch, Rolf}}, booktitle = {{Proceedings of the ISES Solar World Congress 1993, Budapest (Ungarn), 23.–27. August 1993, Band 3, S. 249–254}}, title = {{{Optical and Thermal Parameters of PV-Module Encapsulation Improving Output Power}}}, year = {{1993}}, } @book{8091, author = {{Krauter, Stefan}}, publisher = {{Verlag Köster}}, title = {{{Betriebsmodell der optischen, thermischen und elektrischen Parameter von PV-Modulen}}}, year = {{1993}}, } @techreport{8190, author = {{Andries, Marc and Engels, Gregor}}, publisher = {{Vakgroep Informatica, Rijksuniversiteit Leiden}}, title = {{{A Hybrid Query Language for the Extended Entity Relationship Model}}}, year = {{1993}}, } @techreport{8191, author = {{Ehrig, Hartmut and Engels, Gregor}}, publisher = {{Vakgroep Informatica, Rijksuniversiteit Leiden}}, title = {{{Towards a Module Concept for Graph Transformation Systems}}}, year = {{1993}}, } @techreport{8192, author = {{Engels, Gregor and Rozenberg, Grzegorz}}, publisher = {{Vakgroep Informatica, Rijksuniversiteit Leiden}}, title = {{{Abstracts COMPUGRAPH II Workshop}}}, year = {{1993}}, } @inproceedings{8262, author = {{Engels, Gregor and Groenewegen, Luuk}}, booktitle = {{Proceedings of the Workshop on Software Process (ISPW 1993), Wadern (Germany)}}, pages = {{66--68}}, publisher = {{IEEE Computer Society}}, title = {{{Modular, Visual Specifications of Software Processes}}}, year = {{1993}}, } @article{8895, author = {{Sextro, Walter and Schmalhorst, B}}, journal = {{Zeitschrift für angewandte Mathematik und Mechanik (ZAMM)}}, pages = {{255--257}}, title = {{{Static Behaviour of Drill Strings in Curved Boreholes}}}, volume = {{73}}, year = {{1993}}, } @article{16518, author = {{Barany, Ernest and Dellnitz, Michael and Golubitsky, Martin}}, issn = {{0167-2789}}, journal = {{Physica D: Nonlinear Phenomena}}, pages = {{66--87}}, title = {{{Detecting the symmetry of attractors}}}, doi = {{10.1016/0167-2789(93)90198-a}}, year = {{1993}}, } @article{1655, author = {{Krimphove, Dieter}}, journal = {{Bankkalender 1994}}, number = {{19. Lieferung}}, pages = {{157 ff.}}, publisher = {{DG-Verlag}}, title = {{{Anmerkungen zum Manteltarifvertrag der Banken - Eine Kommentierung des Manteltarifvertrages des Bankgewerbes 1993}}}, year = {{1993}}, } @article{1656, author = {{Krimphove, Dieter}}, journal = {{Recht der Landwirtschaft}}, number = {{Januar-Heft}}, pages = {{4 ff.}}, title = {{{Erzeugergemeinschaften: Wettbewerbsrechtliche Möglichkeiten zur Unternehmenskooperation in der Landwirtschaft}}}, year = {{1993}}, } @article{1657, author = {{Krimphove, Dieter}}, journal = {{Agrarrecht}}, number = {{Heft 1}}, pages = {{7 ff.}}, title = {{{Neuer europäischer Schutz von Marken- und Herkunftszeichen in der Landwirtschaft}}}, year = {{1993}}, } @article{1658, author = {{Krimphove, Dieter}}, journal = {{Europäische Zeitschrift für Wirtschaftsrecht (EuZW)}}, number = {{Mai}}, pages = {{244 ff.}}, title = {{{Europäisches Arbeitsrecht}}}, year = {{1993}}, } @article{16633, abstract = {{AbstractWe obtain normal forms for infinitesimally symplectic matrices (or linear Hamiltonian vector fields) that commute with the symplectic action of a compact Lie group of symmetries. In doing so we extend Williamson's theorem on normal forms when there is no symmetry present.Using standard representation-theoretic results the symmetry can be factored out and we reduce to finding normal forms over a real division ring. There are three real division rings consisting of the real, complex and quaternionic numbers. Of these, only the real case is covered in Williamson's original work.}}, author = {{Melbourne, Ian and Dellnitz, Michael}}, issn = {{0305-0041}}, journal = {{Mathematical Proceedings of the Cambridge Philosophical Society}}, pages = {{235--268}}, title = {{{Normal forms for linear Hamiltonian vector fields commuting with the action of a compact Lie group}}}, doi = {{10.1017/s0305004100071577}}, year = {{1993}}, } @article{16634, author = {{Melbourne, Ian and Dellnitz, Michael and Golubitsky, Martin}}, issn = {{0003-9527}}, journal = {{Archive for Rational Mechanics and Analysis}}, pages = {{75--98}}, title = {{{The structure of symmetric attractors}}}, doi = {{10.1007/bf00386369}}, year = {{1993}}, } @article{16729, author = {{Dietzfelbinger, M. and Meyer auf der Heide, Friedhelm}}, issn = {{0890-5401}}, journal = {{Information and Computation}}, pages = {{196--217}}, title = {{{An Optimal Parallel Dictionary}}}, doi = {{10.1006/inco.1993.1007}}, year = {{1993}}, } @inbook{16730, author = {{Meyer auf der Heide, Friedhelm and Oesterdiekhoff, Brigitte and Wanka, Rolf}}, booktitle = {{Automata, Languages and Programming}}, isbn = {{9783540569398}}, issn = {{0302-9743}}, title = {{{Strongly adaptive token distribution}}}, doi = {{10.1007/3-540-56939-1_89}}, year = {{1993}}, } @inproceedings{16731, author = {{Dietzfelbinger, Martin and Meyer auf der Heide, Friedhelm}}, booktitle = {{Proceedings of the fifth annual ACM symposium on Parallel algorithms and architectures - SPAA '93}}, isbn = {{0897915992}}, title = {{{Simple, efficient shared memory simulations}}}, doi = {{10.1145/165231.165246}}, year = {{1993}}, } @inbook{16732, author = {{Lürwer-Brüggemeier, Katharina and Meyer auf der Heide, Friedhelm}}, booktitle = {{Lecture Notes in Computer Science}}, isbn = {{9783540565031}}, issn = {{0302-9743}}, title = {{{Capabilities and complexity of computations with integer division}}}, doi = {{10.1007/3-540-56503-5_46}}, year = {{1993}}, } @inproceedings{16828, author = {{Domik, Gitta}}, booktitle = {{University Education Uses of Visualization in Scientific Computing, Proceedings of the {IFIP} {WG3.2} Working Conference on Visualization in Scientific Computing: Uses in University Education, Irvine, CA, USA, 28-30 July, 1993}}, editor = {{D. Franklin, Stephen and R. Stubberud, Allen and P. Wiedeman, Lyle}}, pages = {{25--32}}, publisher = {{North-Holland}}, title = {{{Education in Scientific Visualization}}}, volume = {{{A-48}}}, year = {{1993}}, } @inproceedings{16906, author = {{Domik, Gitta}}, booktitle = {{Proceedings of ED Media '93}}, editor = {{Maurer, H.}}, location = {{Orlando, Florida}}, title = {{{Scientific Visualization}}}, year = {{1993}}, } @article{17013, author = {{Dellnitz, Michael}}, journal = {{Lectures in Applied Mathematics}}, pages = {{163--169}}, title = {{{The equivariant Darboux theorem}}}, volume = {{29}}, year = {{1993}}, } @inproceedings{11718, abstract = {{Linear discriminant analysis (LDA) experiments reported previously (ICASSP-92 vol.1, p.13-16), are extended to context-dependent models and speaker-independent large vocabulary continuous speech recognition. Two variants of using mixture densities are compared: state-specific modeling and the monophone-tying approach where densities are shared across the states relevant to the same phoneme. Results are presented on the DARPA Resource Management (RM) task for both speaker-dependent (SD) and speaker-independent (SI) parts. Using triphone models based on LDA and continuous mixture densities, significant improvements have been observed and the following word error rates have been achieved: for the SD part, 7.8% without grammar and 1.5% with word pair; and for the SI part, 17.2% and 4.6%, respectively. These scores are averaged over 1200 SD or SI evaluation sentences and are among the best published so far on the RM database.}}, author = {{Aubert, Xavier L. and Haeb-Umbach, Reinhold and Ney, Hermann}}, booktitle = {{ICASSP, Minneapolis}}, title = {{{Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models}}}, year = {{1993}}, } @article{11749, abstract = {{To decrease the hazards of using mobile phones while driving, voice processing provides several tools that simplify their use: echo cancellation allows comfortable hands-free conversation, feedback and user guidance by voice allow to operate the phone in eyes-busy situations, and last not least speech recognition frees from keypad data entry to operate the telephone. A comprehensive view of a device incorporating the above mentioned technologies, which has been realized as an add-on for the Philips car telephone family, will be presented. Emphasis is placed on the speech recognition algorithms. Robustness of the algorithms to changing acoustic environment was improved by estimating and subtracting the long-term spectrum. We will show that, if this operation is done recursively, it is equivalent to the high-pass filtering or RASTA (Relative Spectral Approaches) methods recently proposed in the literature.}}, author = {{Dobler, Stefan and Geller, Dieter and Haeb-Umbach, Reinhold and Meyer, Peter and Ney, Hermann and Ruehl, Hans Wilhelm}}, journal = {{Speech Communication}}, title = {{{Design and use of speech recognition algorithms for a mobile radio telephone}}}, year = {{1993}}, } @inproceedings{11788, abstract = {{Four methods were used to reduce the error rate of a continuous-density hidden Markov-model-based speech recognizer on the TI/NIST connected-digits recognition task. Energy thresholding sets a lower limit on the energy in each frequency channel to suppress spurious distortion accumulation caused by random noise. This led to an improvement in error rate by 15%. Spectrum normalization was used to compensate for across-speaker variations, resulting in an additional improvement by 20%. The acoustic resolution was increased up to 32 component densities per mixture. Each doubling of the number of component densities yielded a reduction in error rate by roughly 20%. Linear discriminant analysis was used for improved feature selection. A single class-independent transformation matrix was applied to a large input vector consisting of several adjacent frames, resulting in an improvement by 20% for high acoustic resolution. The final string error rate was 0.84%.}}, author = {{Haeb-Umbach, Reinhold and Geller, Dieter and Ney, Hermann}}, booktitle = {{ICASSP, Minneapolis}}, title = {{{Improvements in Connected Digit Recognition Using Linear Discriminant Analysis and Mixture Densities}}}, year = {{1993}}, } @inproceedings{11904, abstract = {{This paper gives a status report of the Philips research system for phoneme-based, large-vocabulary, continuous-speech recognition. Like for many other systems, the recognition architecture is based on an integrated statistical approach. We describe the characteristic features of the system as opposed to other systems: 1. The Viterbi criterion is consistently applied both in training and testing. 2. Continuous mixture densities are used without tying or smoothing. 3. Time-synchronous beam search in connection with a phoneme look-ahead is applied to a tree-organized lexicon. The system has been successfully applied to the American English DARPA RM task. Here, we report experimental results for a German 13 000-word Philips internal dictation task. In addition to the scientific prototype, a PC version has been set up which is described here for the first time.}}, author = {{Steinbiss, Volker and Ney, Hermann and Haeb-Umbach, Reinhold and Train, B.-H. and Essen, U. and Kneser, Reinhard and Oerder, Martin and Meier, H. G. and Aubert, X. and Dugast, Christian and Geller, Dieter and Hoellerbauer, W. and Bartosik, H.}}, booktitle = {{EUROSPEECH, Berlin}}, title = {{{The Philips Research System for Large-Vocabulary Continuous-Speech Recognition}}}, year = {{1993}}, } @article{15045, author = {{Domik, Gitta}}, journal = {{COMPUTER GRAPHICS-NEW YORK-ASSOCIATION FOR COMPUTING MACHINERY-}}, pages = {{6--6}}, publisher = {{ACM ASSOCIATION FOR COMPUTING MACHINERY}}, title = {{{An Agenda for Education in Scientific Visualization, Visualization'92 Workshop Report}}}, volume = {{27}}, year = {{1993}}, } @article{15273, author = {{Domik, Gitta}}, issn = {{1017-4656}}, journal = {{Computers & Graphics}}, number = {{2}}, pages = {{185--191}}, publisher = {{Elsevier}}, title = {{{Guidelines for a curriculum in scientific visualization}}}, doi = {{10.1016/0097-8493(93)90103-G}}, volume = {{17}}, year = {{1993}}, } @inproceedings{15275, author = {{Domik, Gitta and Joslyn, C and Segura, T}}, booktitle = {{Proceedings of the Vienna Conference on Human Computer Interaction}}, title = {{{Macroscopic and Microscopic Aspects of Glyphs}}}, year = {{1993}}, } @article{13857, author = {{Schmidt, Wolf Gero and Srivastava, G P}}, issn = {{0953-8984}}, journal = {{Journal of Physics: Condensed Matter}}, number = {{49}}, pages = {{9025--9036}}, title = {{{Chemisorption of aluminium on GaAs(110)}}}, doi = {{10.1088/0953-8984/5/49/005}}, volume = {{5}}, year = {{1993}}, } @article{13858, author = {{Schmidt, Wolf Gero and Wenzien, Bernd and Bechstedt, Friedhelm}}, issn = {{0011-4626}}, journal = {{Czechoslovak Journal of Physics}}, number = {{9-10}}, pages = {{1003--1007}}, title = {{{AB initio calculation of the atomic and electronic structure for Sb adsorbed on GaAs(110)}}}, doi = {{10.1007/bf01595293}}, volume = {{43}}, year = {{1993}}, } @misc{13081, author = {{Hellebrand, Sybille and Tarnick, Steffen and Rajski, Janusz and Courtois, Bernard}}, keywords = {{WORKSHOP}}, title = {{{Effiziente Erzeugung deterministischer Muster im Selbsttest}}}, year = {{1993}}, } @misc{13082, author = {{Hellebrand, Sybille and Wunderlich, Hans-Joachim}}, keywords = {{WORKSHOP}}, title = {{{Synthesis of Self-Testable Controllers}}}, year = {{1993}}, } @article{13466, author = {{Platzner, Marco and Steger, Christian}}, journal = {{Mikroelektronik}}, title = {{{Erfahrungen mit einer Multi-Signalprozessorarchitektur (TMS320C40)}}}, year = {{1993}}, } @inproceedings{13467, author = {{Platzner, Marco and Steger, Christian and Weiss, Reinhold }}, booktitle = {{Proceedings of the 4th International Conference on Signal Processing Applications & Technology (ICSPAT)}}, publisher = {{DSP Associates}}, title = {{{Performance Measurements on a Multi-DSP Architecture with TMS320C40}}}, year = {{1993}}, } @inproceedings{30015, author = {{Lüdeke, H.-P. and Maas, Jürgen and Fröhleke, Norbert and Grotstollen, Horst}}, booktitle = {{Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting}}, publisher = {{IEEE}}, title = {{{Controller design for resonant converters by automatable techniques}}}, doi = {{10.1109/ias.1993.299003}}, year = {{1993}}, } @misc{17761, author = {{Peckhaus, Volker}}, booktitle = {{History and Philosophy of Logic}}, pages = {{101--107 (Essay review)}}, title = {{{Arie L. Molendijk, Aus dem Dunklen ins Helle. Wissenschaft und Theologie im Denken von Heinrich Scholz. Mit unveröffentlichten Thesenreihen von Heinrich Scholz und Karl Barth. Rodopi: Amsterdam/Atlanta, GA 1991 (= Amsterdam Studies in Theology; VIII)}}}, volume = {{14}}, year = {{1993}}, } @misc{17773, author = {{Peckhaus, Volker}}, booktitle = {{Modern Logic}}, pages = {{311--320}}, title = {{{Ein Jahrhundert Mathematik 1890–1990. Festschrift zum Jubiläum der DMV. hg. v. Gerd Fischer/Friedrich Hirzebruch/Winfried Scharlau/Willi Törnig, Friedrich Vieweg & Sohn: Braunschweig/Wiesbaden 1990 (= Dokumente zur Geschichte der Mathematik; 6)}}}, volume = {{3}}, year = {{1993}}, } @inproceedings{17831, author = {{Peckhaus, Volker}}, booktitle = {{XIXth International Congress of History of Science. 22–29 August 1993 Zaragoza (Spain). Book of Abstracts Symposia}}, editor = {{Hormigon, Mariano and Ausejo, Elena and Dhombres, Jean}}, title = {{{The Development of Ernst Schröder’s Attitude towards Logic [Abstract]}}}, volume = {{Nr. 4.2}}, year = {{1993}}, } @inproceedings{17829, author = {{Peckhaus, Volker}}, booktitle = {{Fachsektion Geschichte der Mathematik der Deutschen Mathematiker-Vereinigung. Sektionstagung vom 22. bis 26. März 1993 in Wuppertal}}, editor = {{Toepell, Michael}}, pages = {{30--31}}, title = {{{Leibniz’ ,Mathesis universalis‘ und die Mathematiker des 19. Jahrhunderts [Abstract]}}}, year = {{1993}}, }