TY - CHAP
AU - Diekmann, Ralf
AU - Simon, Jens
ID - 2456
SN - 978-3-642-46787-5
T2 - Applied Simulated Annealing
TI - Problem Independent Distributed Simulated Annealing and its Applications
VL - 396
ER -
TY - GEN
AU - Blömer, Johannes
ID - 3045
TI - On Kummer theory and the number of roots of unity in radical extensions of Q
ER -
TY - JOUR
AU - Gries, Thomas
AU - Wigger, B.
ID - 3069
IS - 4
JF - Economia Internationale
TI - The Dynamics of Upgrading or how to catch-up
VL - 46
ER -
TY - BOOK
AU - Fuchssteiner, Benno
AU - Wiwianka, W.
AU - Gottheil, K.
AU - Kemper, A.
AU - Kluge, O.
AU - Morisse, K.
AU - Naundorf, H.
AU - Oevel, Gudrun
AU - Schulze, T.
ID - 17302
TI - MuPAD: Multi Processing Algebra Data Tool; Benutzerhandbuch; MuPAD Version 1.1
ER -
TY - CONF
AU - Peckhaus, Volker
ED - Stelzner, Werner
ID - 17476
T2 - Philosophie und Logik. Frege-Kolloquien Jena 1989/1991
TI - Ernst Schröder und der Logizismus
VL - 3
ER -
TY - BOOK
ED - Meyer auf der Heide, Friedhelm
ED - Monien, B.
ED - Rosenberg, A. L.
ID - 17477
SN - 0302-9743
TI - Parallel Architectures and Their Efficient Use
ER -
TY - CHAP
AU - Peckhaus, Volker
ED - Haller, Rudolf
ED - Stadler, Friedrich
ID - 17478
T2 - Wien—Berlin—Prag. Der Aufstieg der wissenschaftlichen Philosophie. Zentenarien Rudolf Carnap–Hans Reichenbach–Edgar Zilsel
TI - Kurt Grelling und der Logische Empirismus
VL - 2
ER -
TY - CONF
AU - Kastens, Uwe
AU - Meyer auf der Heide, Friedhelm
AU - Wachsmann, Alf
AU - Wichmann, Friedrich
ID - 17479
T2 - Proc. 3rd PASA Workshop, PARS Mitteilungen
TI - OCCAM-light: A Language Combining Shared Memory and Message Passing (A First Report)
ER -
TY - JOUR
AB - Page 4
AU - Peckhaus, Volker
ID - 19046
IS - 4
JF - The Mathematical Intelligencer
TI - Fotografie: Ivor Grattan-Guinness (Erlangen, 21.2.1989)
VL - 15
ER -
TY - BOOK
ED - Eke, Norbert Otto
ED - Helmes, Günter
ID - 19090
TI - Richard Beer-Hofmann (1866-1945). Studien zu seinem Werk
ER -
TY - BOOK
AU - Eke, Norbert Otto
ID - 19137
TI - Stanislaw Przybyszewski: Schnee und andere Dramen (Edition)
VL - 5
ER -
TY - BOOK
AU - Eke, Norbert Otto
AU - Oellers, Norbert
AU - Skrodzki, Karl Jürgen
AU - Steinecke, Hartmut
ID - 19148
TI - Nikolaus Lenau. Werke und Briefe. Historisch-kritische Gesamtausgabe. Bd. 7. Aufzeichnungen. Vermischte Schriften. Text und Kommentar (Edition)
ER -
TY - CHAP
AU - Eke, Norbert Otto
ED - Eke, Norbert Otto
ED - Helmes, Günter
ID - 19427
T2 - Richard Beer-Hofmann (1866-1945). Studien zu seinem Werk
TI - Rettung des Sinns. Jaákobs Traum und das Projekt einer Geschichtstheodizee
ER -
TY - CHAP
AU - Eke, Norbert Otto
AU - Helmes, Günter
ED - Eke, Norbert Otto
ED - Helmes, Günter
ID - 19428
T2 - Richard Beer-Hofmann (1866-1945). Studien zu seinem Werk
TI - Richard Beer-Hofmann – Zur Einführung
ER -
TY - CHAP
AU - Eke, Norbert Otto
ID - 19429
T2 - Grabbe Jahrbuch 12
TI - „Freiheit ist nur in dem Reich der Träume“. Revolutionsprojektionen deutscher Dramen nach 1789. Ein historischer Aufriß (mit einem Ausblick bis zum Nachmärz)
ER -
TY - JOUR
AU - Eke, Norbert Otto
ID - 19430
IS - H. 2
JF - Zeitschrift für Germanistik
TI - Eine Gesamtbibliographie des deutschen Romans 1815-1830. Anmerkungen zum Problemfeld von Bibliographie und Historiographie
VL - NF III
ER -
TY - CHAP
AU - Eke, Norbert Otto
ED - Scheuer, Helmut
ID - 19431
T2 - Dichter und ihre Nation
TI - „Deutschland ortlos“. Dekonstruktionen des Nationalen bei Heiner Müller
ER -
TY - JOUR
AU - Trächtler, Ansgar
ID - 23365
JF - Process Tomography - a Strategy for Industrial Exploitation
TI - Use of Symmetries in Tomography
ER -
TY - JOUR
AU - Trächtler, Ansgar
ID - 23366
JF - at-Automatisierungstechnik
TI - Vollständige Modale Synthese stationär unstörbarer und stationär perfekter Zustandsregelungen
VL - 41
ER -
TY - CONF
AU - Engels, Gregor
AU - Verrijn-Stuart, A.A.
ID - 7826
IS - 251
T2 - Fortschritt-Berichte VDI
TI - Integrationsaspekte bei verteilter Software-Entwicklung
ER -
TY - CONF
AU - Krauter, Stefan
AU - Hanitsch, Rolf
ID - 8089
T2 - Proceedings of the Cairo International Conference of Renewable Energy Sources, Kairo (Ägypten), 30. Dezember 1992 – 2. Januar 1993
TI - Calculating the Influence of Skylight-Polarization on the Transmission of Encapsulations of PV-Modules
ER -
TY - CONF
AU - Krauter, Stefan
AU - Hanitsch, Rolf
ID - 8090
T2 - Proceedings of the ISES Solar World Congress 1993, Budapest (Ungarn), 23.–27. August 1993, Band 3, S. 249–254
TI - Optical and Thermal Parameters of PV-Module Encapsulation Improving Output Power
ER -
TY - BOOK
AU - Krauter, Stefan
ID - 8091
TI - Betriebsmodell der optischen, thermischen und elektrischen Parameter von PV-Modulen
ER -
TY - GEN
AU - Andries, Marc
AU - Engels, Gregor
ID - 8190
TI - A Hybrid Query Language for the Extended Entity Relationship Model
ER -
TY - GEN
AU - Ehrig, Hartmut
AU - Engels, Gregor
ID - 8191
TI - Towards a Module Concept for Graph Transformation Systems
ER -
TY - GEN
AU - Engels, Gregor
AU - Rozenberg, Grzegorz
ID - 8192
TI - Abstracts COMPUGRAPH II Workshop
ER -
TY - CONF
AU - Engels, Gregor
AU - Groenewegen, Luuk
ID - 8262
T2 - Proceedings of the Workshop on Software Process (ISPW 1993), Wadern (Germany)
TI - Modular, Visual Specifications of Software Processes
ER -
TY - JOUR
AU - Sextro, Walter
AU - Schmalhorst, B
ID - 8895
JF - Zeitschrift für angewandte Mathematik und Mechanik (ZAMM)
TI - Static Behaviour of Drill Strings in Curved Boreholes
VL - 73
ER -
TY - JOUR
AU - Barany, Ernest
AU - Dellnitz, Michael
AU - Golubitsky, Martin
ID - 16518
JF - Physica D: Nonlinear Phenomena
SN - 0167-2789
TI - Detecting the symmetry of attractors
ER -
TY - JOUR
AU - Krimphove, Dieter
ID - 1655
IS - 19. Lieferung
JF - Bankkalender 1994
TI - Anmerkungen zum Manteltarifvertrag der Banken - Eine Kommentierung des Manteltarifvertrages des Bankgewerbes 1993
ER -
TY - JOUR
AU - Krimphove, Dieter
ID - 1656
IS - Januar-Heft
JF - Recht der Landwirtschaft
TI - Erzeugergemeinschaften: Wettbewerbsrechtliche Möglichkeiten zur Unternehmenskooperation in der Landwirtschaft
ER -
TY - JOUR
AU - Krimphove, Dieter
ID - 1657
IS - Heft 1
JF - Agrarrecht
TI - Neuer europäischer Schutz von Marken- und Herkunftszeichen in der Landwirtschaft
ER -
TY - JOUR
AU - Krimphove, Dieter
ID - 1658
IS - Mai
JF - Europäische Zeitschrift für Wirtschaftsrecht (EuZW)
TI - Europäisches Arbeitsrecht
ER -
TY - JOUR
AB - 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.
AU - Melbourne, Ian
AU - Dellnitz, Michael
ID - 16633
JF - Mathematical Proceedings of the Cambridge Philosophical Society
SN - 0305-0041
TI - Normal forms for linear Hamiltonian vector fields commuting with the action of a compact Lie group
ER -
TY - JOUR
AU - Melbourne, Ian
AU - Dellnitz, Michael
AU - Golubitsky, Martin
ID - 16634
JF - Archive for Rational Mechanics and Analysis
SN - 0003-9527
TI - The structure of symmetric attractors
ER -
TY - JOUR
AU - Dietzfelbinger, M.
AU - Meyer auf der Heide, Friedhelm
ID - 16729
JF - Information and Computation
SN - 0890-5401
TI - An Optimal Parallel Dictionary
ER -
TY - CHAP
AU - Meyer auf der Heide, Friedhelm
AU - Oesterdiekhoff, Brigitte
AU - Wanka, Rolf
ID - 16730
SN - 0302-9743
T2 - Automata, Languages and Programming
TI - Strongly adaptive token distribution
ER -
TY - CONF
AU - Dietzfelbinger, Martin
AU - Meyer auf der Heide, Friedhelm
ID - 16731
SN - 0897915992
T2 - Proceedings of the fifth annual ACM symposium on Parallel algorithms and architectures - SPAA '93
TI - Simple, efficient shared memory simulations
ER -
TY - CHAP
AU - Lürwer-Brüggemeier, Katharina
AU - Meyer auf der Heide, Friedhelm
ID - 16732
SN - 0302-9743
T2 - Lecture Notes in Computer Science
TI - Capabilities and complexity of computations with integer division
ER -
TY - CONF
AU - Domik, Gitta
ED - D. Franklin, Stephen
ED - R. Stubberud, Allen
ED - P. Wiedeman, Lyle
ID - 16828
T2 - 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
TI - Education in Scientific Visualization
VL - {A-48}
ER -
TY - CONF
AU - Domik, Gitta
ED - Maurer, H.
ID - 16906
T2 - Proceedings of ED Media '93
TI - Scientific Visualization
ER -
TY - JOUR
AU - Dellnitz, Michael
ID - 17013
JF - Lectures in Applied Mathematics
TI - The equivariant Darboux theorem
VL - 29
ER -
TY - CONF
AB - 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.
AU - Aubert, Xavier L.
AU - Haeb-Umbach, Reinhold
AU - Ney, Hermann
ID - 11718
T2 - ICASSP, Minneapolis
TI - Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models
ER -
TY - JOUR
AB - 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.
AU - Dobler, Stefan
AU - Geller, Dieter
AU - Haeb-Umbach, Reinhold
AU - Meyer, Peter
AU - Ney, Hermann
AU - Ruehl, Hans Wilhelm
ID - 11749
JF - Speech Communication
TI - Design and use of speech recognition algorithms for a mobile radio telephone
ER -
TY - CONF
AB - 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%.
AU - Haeb-Umbach, Reinhold
AU - Geller, Dieter
AU - Ney, Hermann
ID - 11788
T2 - ICASSP, Minneapolis
TI - Improvements in Connected Digit Recognition Using Linear Discriminant Analysis and Mixture Densities
ER -
TY - CONF
AB - 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.
AU - Steinbiss, Volker
AU - Ney, Hermann
AU - Haeb-Umbach, Reinhold
AU - Train, B.-H.
AU - Essen, U.
AU - Kneser, Reinhard
AU - Oerder, Martin
AU - Meier, H. G.
AU - Aubert, X.
AU - Dugast, Christian
AU - Geller, Dieter
AU - Hoellerbauer, W.
AU - Bartosik, H.
ID - 11904
T2 - EUROSPEECH, Berlin
TI - The Philips Research System for Large-Vocabulary Continuous-Speech Recognition
ER -
TY - JOUR
AU - Domik, Gitta
ID - 15045
JF - COMPUTER GRAPHICS-NEW YORK-ASSOCIATION FOR COMPUTING MACHINERY-
TI - An Agenda for Education in Scientific Visualization, Visualization'92 Workshop Report
VL - 27
ER -
TY - JOUR
AU - Domik, Gitta
ID - 15273
IS - 2
JF - Computers & Graphics
SN - 1017-4656
TI - Guidelines for a curriculum in scientific visualization
VL - 17
ER -
TY - CONF
AU - Domik, Gitta
AU - Joslyn, C
AU - Segura, T
ID - 15275
T2 - Proceedings of the Vienna Conference on Human Computer Interaction
TI - Macroscopic and Microscopic Aspects of Glyphs
ER -
TY - JOUR
AU - Schmidt, Wolf Gero
AU - Srivastava, G P
ID - 13857
IS - 49
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
TI - Chemisorption of aluminium on GaAs(110)
VL - 5
ER -
TY - JOUR
AU - Schmidt, Wolf Gero
AU - Wenzien, Bernd
AU - Bechstedt, Friedhelm
ID - 13858
IS - 9-10
JF - Czechoslovak Journal of Physics
SN - 0011-4626
TI - AB initio calculation of the atomic and electronic structure for Sb adsorbed on GaAs(110)
VL - 43
ER -
TY - GEN
AU - Hellebrand, Sybille
AU - Tarnick, Steffen
AU - Rajski, Janusz
AU - Courtois, Bernard
ID - 13081
KW - WORKSHOP
TI - Effiziente Erzeugung deterministischer Muster im Selbsttest
ER -
TY - GEN
AU - Hellebrand, Sybille
AU - Wunderlich, Hans-Joachim
ID - 13082
KW - WORKSHOP
TI - Synthesis of Self-Testable Controllers
ER -
TY - JOUR
AU - Platzner, Marco
AU - Steger, Christian
ID - 13466
JF - Mikroelektronik
TI - Erfahrungen mit einer Multi-Signalprozessorarchitektur (TMS320C40)
ER -
TY - CONF
AU - Platzner, Marco
AU - Steger, Christian
AU - Weiss, Reinhold
ID - 13467
T2 - Proceedings of the 4th International Conference on Signal Processing Applications & Technology (ICSPAT)
TI - Performance Measurements on a Multi-DSP Architecture with TMS320C40
ER -
TY - CONF
AU - Lüdeke, H.-P.
AU - Maas, Jürgen
AU - Fröhleke, Norbert
AU - Grotstollen, Horst
ID - 30015
T2 - Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting
TI - Controller design for resonant converters by automatable techniques
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 17761
T2 - History and Philosophy of Logic
TI - 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)
VL - 14
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 17773
T2 - Modern Logic
TI - 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)
VL - 3
ER -
TY - GEN
AU - Peckhaus, Volker
ED - Hormigon, Mariano
ED - Ausejo, Elena
ED - Dhombres, Jean
ID - 17831
T2 - XIXth International Congress of History of Science. 22–29 August 1993 Zaragoza (Spain). Book of Abstracts Symposia
TI - The Development of Ernst Schröder’s Attitude towards Logic [Abstract]
VL - Nr. 4.2
ER -
TY - GEN
AU - Peckhaus, Volker
ED - Toepell, Michael
ID - 17829
T2 - Fachsektion Geschichte der Mathematik der Deutschen Mathematiker-Vereinigung. Sektionstagung vom 22. bis 26. März 1993 in Wuppertal
TI - Leibniz’ ,Mathesis universalis‘ und die Mathematiker des 19. Jahrhunderts [Abstract]
ER -
TY - THES
AU - Heinemann, Lothar
ID - 30020
SN - 3-8267-2036-9
TI - Modellbildung von Mehrwicklungstransformatoren bei quasi-stationären Feldstärkeverteilungen
ER -
TY - THES
AU - Lüdeke, Hans-Peter
ID - 30019
SN - 978-3-89349-872-7
TI - Untersuchung von Schaltnetzteilen mit kontinuierlichen Resonanzschwingungen
ER -
TY - CONF
AU - Venkataraman, Srikanth
AU - Rajski, Janusz
AU - Hellebrand, Sybille
AU - Tarnick, Steffen
ID - 13015
T2 - ACM/IEEE International Conference on Computer Aided Design (ICCAD'93)
TI - An Efficient Bist Scheme Based On Reseeding Of Multiple Polynomial Linear Feedback Shift Registers
ER -
TY - CONF
AU - Böcker, Joachim
AU - Janning, Jörg
AU - Anbuhl, Kay
ID - 29988
T2 - EPE’93, Brighton
TI - Realization of a High-Dynamic Discrete-Time Controller for PWM Inverter-Fed Induction Motor Drives
VL - 4
ER -
TY - CHAP
AU - Öhlschläger, Claudia
ID - 32991
T2 - Rundbrief Frauen in der Literaturwissenschaft 37. Mai 1993: Sprachen der Liebe
TI - ́Augen wie Leuchtkäfer ́ - Zur Sprache der Liebe in Mario Vargas Llosas ́ Lob der Stiefmutter
ER -
TY - JOUR
AU - Schnepp, W.
AU - Disch, S.
AU - Schmidt, Claudia
ID - 35389
IS - 3
JF - Liquid Crystals
KW - Condensed Matter Physics
KW - General Materials Science
KW - General Chemistry
SN - 0267-8292
TI - 2H NMR study on the lyomesophases of the system hexaethylene glycol dodecyl methyl ether/water Temperature dependence of quadrupole splittings
VL - 14
ER -
TY - JOUR
AU - Rosen, M. E.
AU - Rucker, S. P.
AU - Schmidt, Claudia
AU - Pines, A.
ID - 35387
IS - 15
JF - The Journal of Physical Chemistry
KW - Physical and Theoretical Chemistry
KW - General Engineering
SN - 0022-3654
TI - Two-dimensional proton NMR studies of the conformations and orientations of n-alkanes in a liquid-crystal solvent
VL - 97
ER -
TY - CHAP
AU - Maas, Utz
AU - Tophinke, Doris
ED - Schmidt-Radefeld, Jürgen
ED - Harder, Andreas
ID - 18430
T2 - Sprachwandel und Sprachgeschichte. FS für Helmut Lüdtke
TI - Loser und fester Anschluß. Versuch der Neubewertung einer abgelegten Kategorie
ER -
TY - CHAP
AU - Maas, Utz
AU - Frankenbusch, Marita
AU - Johannlückens, Ralf
AU - Stöwer-Gaus, Ursula
AU - Striezel, Marion
AU - Tophinke, Doris
ED - Bade u. a., Klaus J.
ID - 18429
T2 - Damme. Eine Stadt in ihrer Geschichte
TI - Sprachentwicklung in Geschichte und Gegenwart
ER -
TY - CHAP
AU - Hagengruber, Ruth Edith
ED - Albertini, Tamara
ID - 15570
T2 - Verum et Factum. Beiträge zur Geistesgeschichte und Philosophie der Renaissance. Festschrift zum 60. Geburtstag von Stephan Otto
TI - Punkt und Mathematik in der Metaphysik des Tommaso Campanella
ER -
TY - BOOK
AU - Kamp, Hermann
ID - 34422
TI - Memoria und Selbstdarstellung. Die Stiftungen des burgundischen Kanzlers Rolin
VL - 30
ER -
TY - CONF
AU - Müller, Wolfgang
AU - Kleinjohann, Bernd
ID - 39578
T2 - Proceedings of the Seventh Annual Database Symposium
TI - Tight Integration and Synchronization of Distributed Graphical Applications
ER -
TY - JOUR
AU - Kitzerow, Heinz-Siegfried
AU - Crooker, P. P.
ID - 40003
IS - 1
JF - Liquid Crystals
KW - Condensed Matter Physics
KW - General Materials Science
KW - General Chemistry
SN - 0267-8292
TI - Electric field effects on the droplet structure in polymer dispersed cholesteric liquid crystals
VL - 13
ER -
TY - JOUR
AU - Kitzerow, Heinz-Siegfried
AU - Schmid, H.
AU - Ranft, A.
AU - Heppke, G.
AU - Hikmet, R. A. M.
AU - Lub, J.
ID - 40005
IS - 3
JF - Liquid Crystals
KW - Condensed Matter Physics
KW - General Materials Science
KW - General Chemistry
SN - 0267-8292
TI - Observation of blue phases in chiral networks
VL - 14
ER -
TY - CONF
AU - Müller, Wolfgang
ID - 39580
T2 - Proc. of the 1st Asian Pacific Conference on Hardware Description Languages, Standards and Applications
TI - Approaching the Denotational Semantics of Behavioral VHDL Descriptions
ER -
TY - CONF
AU - Müller, Wolfgang
AU - Lehrenfeld, Georg
AU - Wiechers, N.
ID - 39579
T2 - Proceedings of the 3nd EXPRESS User's Group Conference
TI - Parallel Validation of STEP Files
ER -
TY - JOUR
AU - Dolganov, V. K.
AU - Lourie, O. R.
AU - Heppke, G.
AU - Kitzerow, Heinz-Siegfried
ID - 40074
IS - 7
JF - Journal de Physique II
KW - Physics and Astronomy (miscellaneous)
KW - General Engineering
KW - Atomic and Molecular Physics
KW - and Optics
SN - 1155-4312
TI - Anomalies of the temperature dependence of electrostriction in blue phases
VL - 3
ER -
TY - JOUR
AU - Kitzerow, Heinz-Siegfried
AU - Crooker, P. P.
ID - 40071
IS - 5
JF - Journal de Physique II
KW - Physics and Astronomy (miscellaneous)
KW - General Engineering
KW - Atomic and Molecular Physics
KW - and Optics
SN - 1155-4312
TI - UV-cured cholesteric polymer-dispersed liquid crystal display
VL - 3
ER -
TY - JOUR
AU - Lasser, R.
AU - Rösler, Margit
ID - 40216
IS - 5
JF - Archiv der Mathematik
KW - General Mathematics
SN - 0003-889X
TI - A note on property (T) of orthogonal polynomials
VL - 60
ER -
TY - CONF
AU - Molsen, H.
AU - Bardon, R.
AU - Kitzerow, Heinz-Siegfried
ID - 40516
T2 - SID Conference Proceedings, 13th International Display Research Conference
TI - Electrooptics of Polymer-Dispersed Ferroelectric Liquid Crystals
ER -
TY - JOUR
AU - EBBERG, A
AU - Noé, Reinhold
AU - STOLL, L
AU - SCHIMPE, R
ID - 38496
IS - 5-6
JF - JOURNAL OF LIGHTWAVE TECHNOLOGY
SN - 0733-8724
TI - A COHERENT OFDM SWITCHING-SYSTEM FOR FLEXIBLE OPTICAL NETWORK CONFIGURATION
VL - 11
ER -
TY - JOUR
AU - Heppke, G.
AU - Kitzerow, Heinz-Siegfried
AU - Molsen, H.
ID - 40327
IS - 1
JF - Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
KW - Condensed Matter Physics
SN - 1058-725X
TI - Electroclinic Effect in a Polymer-Dispersed Ferroelectric Liquid Crystal
VL - 237
ER -
TY - JOUR
AU - Krüerke, D.
AU - Kitzerow, Heinz-Siegfried
AU - Heppke, G.
AU - Vill, V.
ID - 40324
IS - 10
JF - Berichte der Bunsengesellschaft für physikalische Chemie
KW - General Chemical Engineering
SN - 0005-9021
TI - First Observation of Selective Reflection and Blue Phases in Chiral Discotic Liquid Crystals
VL - 97
ER -
TY - JOUR
AU - Baena, Maria J.
AU - Buey, Julio
AU - Espinet, Pablo
AU - Kitzerow, Heinz-Siegfried
AU - Heppke, Gerd
ID - 40326
IS - 8
JF - Angewandte Chemie International Edition in English
KW - General Chemistry
KW - Catalysis
SN - 0570-0833
TI - Metallomesogens with a Cholesteric Mesophase
VL - 32
ER -
TY - CONF
AU - Brab, E.
AU - Hilleringmann, Ulrich
AU - Schumacher, K.
ID - 39909
T2 - ESSCIRC ’93: Nineteenth European Solid-State Circuits Conference
TI - Monolithic System Integration of Optical Devices, Photodetectors and Analog Transimpedance CMOS Amplifiers
VL - 1
ER -
TY - CONF
AU - Schonstein, I.
AU - Muller, J.
AU - Hilleringmann, Ulrich
AU - Goser, K.
ID - 39910
T2 - ESSDERC ’93: 23rd European solid State Device Research Conference
TI - Hot Carrier Monitoring in NMOS Transistors by Visible Light Emission
ER -
TY - CONF
AU - Hilleringmann, Ulrich
AU - Adam, S
AU - Goser, K
ID - 39913
T2 - ESSDtRC’93
TI - Micromechanic pressure sensors with optical readout and CMOS-preamplifiers on one silicon chip: Processing and first results
ER -
TY - JOUR
AB - We present subpicosecond time-resolved four-wave-mixing studies on GaAs/AlAs short-period superlattices having different miniband widths. Photon echoes are observed as a consequence of the inhomogeneous broadening of the excitonic resonance. In addition, the photon-echo signal exhibits periodic modulations as a function of the time delay between the excitation laser pulses. Free excitons and excitons bound to neutral acceptors are identified as the underlying three-level system leading to the observed photon-echo quantum beats. From the beat period we can directly infer the dissociation energy of the bound exciton. In accordance with theory, we find that the dissociation energy decreases with increasing miniband width, i.e., when the excitons become less confined. In addition, we find that the dephasing rate of bound excitons is about one order of magnitude less than that of free excitons and is mainly determined by energy relaxation.
AU - Meier, Torsten
AU - Koch, M.
AU - Weber, D.
AU - Feldmann, J.
AU - Göbel, E.O.
AU - Schulze, A.
AU - Thomas, P.
AU - Schmitt-Rink, S.
AU - Ploog, K.
ID - 43449
IS - 3
JF - Physical Review B
TI - Subpicosecond photon-echo spectroscopy on GaAs/AlAs short-period superlattices
VL - 47
ER -
TY - CHAP
AB - Femtosecond nonlinear laser spectroscopy is applied to study the dynamics of coherent optical excitations in semiconductors. In particular, beat phenomena of excitonic excitations in quantum wells and superlattice structures will be considered. We will demonstrate that four wave mixing experiments with time resolved detection of the nonlinear signal are able to distinguish between quantum beats and polarization interference. In addition, we report for a GaAs/AlAs superlattice the observation of quantum beats in the photon echo signal. The occurence of these beats is attributed to the simultaneous excitation of bound and localized excitons.
AU - Meier, Torsten
AU - Göbel, E.O.
AU - Koch, M.
AU - Feldmann, J.
AU - von Plessen, G.
AU - Schulze, A.
AU - Thomas, P.
AU - Schmitt-Rink, S.
AU - Köhler, K.
AU - Ploog, K.
ED - Lookwood, D.
ED - Pinczuk, A.
ID - 43442
SN - 978-94-010-4845-3
T2 - Optical Phenomena in Semiconductor Structures of Reduced Dimension
TI - Time resolved Four Wave Mixing in GaAs/AlAs Quantum Well Structures
ER -
TY - JOUR
AB - We report on the coherent dynamics of excitonic wave packets observed in transient four-wave mixing experiments on strained InGaAs/GaAs quantum-well structures. The excitonic noneigenstates are created by using laser pulses shorter than the electron round trip time within the exciton orbital. A characteristic temporal modulation of the diffracted signal is observed, which resembles the coherent dynamics of an electron wave packet in a hydrogen atom expected for the case of a simultaneous excitation of all bound and the lowest continuum states.
AU - Meier, Torsten
AU - Feldmann, J.
AU - von Plessen, G.
AU - Koch, M.
AU - Göbel, E.O.
AU - Thomas, P.
AU - Bacher, G.
AU - Hartmann, C.
AU - Schweizer, H.
AU - Schäfer, W.
AU - Nickel, H.
ID - 43448
IS - 20
JF - Physical review letters
TI - Coherent Dynamics of Excitonic Wave Packets
VL - 70
ER -
TY - JOUR
AB - Exciton coupling is studied for double quantum wells, which are separated by thick barriers. Results are presented for the linear optical spectrum, stationary and transient luminescence as well as four-wave-mixing signals. Additionally, coherent and incoherent transport through the barrier is considered
AU - Meier, Torsten
AU - Batsch, M.
AU - Thomas, P.
AU - Lindberg, M.
AU - Koch, S.W.
AU - Shah, J.
ID - 43447
IS - 16
JF - Physical Review B
TI - Dipole-dipole coupling of excitons in double quantum wells
VL - 48
ER -
TY - GEN
AU - Schroeter-Wittke, Harald
ID - 43510
T2 - Der Evangelische Erzieher
TI - Schalom Ben-Chorin: Ich lege meine Hand auf meinen Mund. Meditation zu Johannes Brahms "Ein Deutsches Requiem" und Arnold Schönbergs "Ein Überlebender aus Warschau"
VL - 45
ER -
TY - JOUR
AU - Schroeter-Wittke, Harald
ID - 43508
IS - 3-4
JF - Forschungsjournal Neue Soziale Bewegungen
TI - Eccelsia ludens. Ein Versuch über den Deutschen Evangelischen Kirchentag
VL - 6
ER -
TY - CHAP
AU - Schroeter-Wittke, Harald
ED - Domay, Erhard
ID - 43509
T2 - Gottesdienstpraxis. Serie A. III. Perikopenreihe Band 2
TI - Christi Himmelfahrt. Predigttext: 1. Könige 8,22-24.26-28
ER -
TY - CHAP
AU - Schroeter-Wittke, Harald
AU - Wicke, Berthold
ED - Koerrenz, Ralf
ED - Remy, Jochen
ID - 43507
T2 - Mit Liedern predigen. Theorie und Praxis der Liedpredigt
TI - Wir sind bei Gott gelitten - Ein Passionsgottesdiernst über den Choral "O Haupt voll Blut und Wunden" und seine Melodie
ER -
TY - THES
AU - Schroeter-Wittke, Harald
ID - 43505
SN - 3-17-012556-7
TI - Kirchentag als vor-läufige Kirche. Der Kirchentag als eine besondere Gestalt des Christseins zwischen kirche und Welt
VL - 13
ER -
TY - CHAP
AU - Schroeter-Wittke, Harald
ED - Englert, Rudolf
ID - 43506
T2 - Woran sie glaubten - wofür sie lebten. 365 Wegbegleiter für die Tages des Jahres
TI - 12. März - Geburtstag von Paul Gerhardt (1607-1676)
ER -
TY - THES
AU - Müller, Inez
ID - 44157
SN - 3-86110-015-0
TI - Walter Benjamin und Bertolt Brecht - Ansätze zu einer dialektischen Ästhetik in den dreißiger Jahren.
VL - 40
ER -
TY - CONF
AB - In degenerate four-wave-mixing (DFWM) experiments the polarization of the incident laser pulses can have a strong influence on the measured signal. For GaAs quantum wells a number of DFWM experiments were performed by using either parallel or perpendicular polarization of the incident laser pulses. Experimentally, it turned out that some characteristic features of the signal differ appreciably for the two configurations. In particular, different dephasing times, phase shifts of the quantum beats, different time-resolved behavior (echoes versus free-induction decay), and intensity dependence of the measured signal have been reported
AU - Meier, Torsten
AU - Bennhardt, D.
AU - Thomas, P.
AU - Eccleston, R.
AU - Mayer, E.
AU - Kuhl, J.
ID - 44286
SN - 1-55752-302-9
T2 - Quantum Electronics and Laser Science Conference
TI - Theory for polarization-dependent four-wave-mixing signals in quantum wells
ER -
TY - CONF
AB - We investigate the coherent coupling of free and bound excitonic transitions, as wets as of distinct excitonic transitions arising from spatially separated quantum-well islands by means of time-resolved four-wave-mixing experiments.
AU - Meier, Torsten
AU - Koch, M.
AU - Feldmann, J.
AU - von Plessen, G.
AU - Schulze, A.
AU - Göbel, E.O.
AU - Thomas, P.
AU - Schmitt-Rink, S.
AU - Shah, J.
AU - Ploog, K.
AU - Köhler, K.
ID - 44287
SN - 1-55752-302-9
T2 - Quantum Electronics and Laser Science Conference
TI - Coherent coupling of exciton transitions in semiconductor quantum structures
ER -