@article{38300, author = {{Hinz, S and Sandel, D and Wust, F and Noé, Reinhold}}, issn = {{1094-4087}}, journal = {{OPTICS EXPRESS}}, number = {{3}}, pages = {{136--140}}, title = {{{PMD tolerance of polarization division multiplex transmission using return-to-zero coding}}}, doi = {{10.1364/OE.9.000136}}, volume = {{9}}, year = {{2001}}, } @article{38291, author = {{Plotz, R and Michaelis, S and Aigner, R and Timme, HJ and Binder, J and Noé, Reinhold}}, issn = {{0924-4247}}, journal = {{SENSORS AND ACTUATORS A-PHYSICAL}}, number = {{1-3}}, pages = {{312--317}}, title = {{{A low-voltage torsional actuator for application in RF-microswitches}}}, doi = {{10.1016/S0924-4247(01)00589-1}}, volume = {{92}}, year = {{2001}}, } @article{38370, author = {{Sandel, D and Noé, Reinhold and Mirvoda, V and Hinz, S and Wust, F}}, issn = {{0013-5194}}, journal = {{ELECTRONICS LETTERS}}, number = {{19}}, pages = {{1178--1179}}, title = {{{84fs PMD detection sensitivity in 2 x 40 Gbit/s RZ polarisation multiplex transmission experiment}}}, doi = {{10.1049/el:20010791}}, volume = {{37}}, year = {{2001}}, } @misc{38035, author = {{Öhlschläger, Claudia}}, booktitle = {{Arbitrium}}, pages = {{273--277}}, title = {{{Kunst-Macht-Gewalt. Der ästhetische Ort der Aggressivität}}}, volume = {{3}}, year = {{2001}}, } @inproceedings{39406, abstract = {{Die Object Constraint Language (OCL) wurde entwickelt, um Modellierer bei der Spe- zifikation von Modelleigenschaften im Kontext gegebener UML Diagramme zu un- terst ̈utzen [3]. Jedoch ist es leider nicht m ̈oglich, Eigenschaften, die das dynamische Verhalten betreffen, mit der derzeitigen Version von OCL auszudr ̈ucken. Wir pr ̈asentieren eine Erweiterung von OCL Version 1.4 zur Spezifikation von zu- standsbasierten, zeitbehafteten Eigenschaften. Obwohl OCL und unsere Erweiterung in erster Linie im Rahmen der UML entwickelt worden sind, ist es auch m ̈oglich, mit dieser Sprache Eigenschaften f ̈ur andere objektbasierte Formalismen zu beschrei- ben. Wir veranschaulichen dies anhand einer Anwendung bei der Modellpr ̈ufungsspe- zifikation in Verbindung mit MFERT, einer praxisrelevanten Notation, die im Projekt GRASP zur Modellierung von Produktionsabl ̈aufen eingesetzt wird.}}, author = {{Flake, Stephan and Müller, Wolfgang}}, title = {{{Spezifikation von Echtzeiteigenschaften mit OCL für eine MFERT-basierte Fallstudie}}}, year = {{2001}}, } @inproceedings{39425, abstract = {{This paper introduces the VIVID (Visual Interactive VIew Development) framework for generation and customization of advanced visual interactive environments for resource manipulation in databases. The framework covers the definition of symbols, their mapping to database objects, specification of spatial relationships among them, layout assignment as well as the definition of drag&drop-based user interactions.}}, author = {{Dangberg, Andreas and Müller, Wolfgang}}, booktitle = {{Proceedings of ISI 2001}}, title = {{{Generation of Interactive Visual Interfaces for Resource Management}}}, year = {{2001}}, } @misc{39994, author = {{Morrien, Rita}}, isbn = {{9783412149000 }}, publisher = {{Böhlau}}, title = {{{Sinn und Sinnlichkeit. Der weibliche Körper in der deutschen Literatur der Bürgerzeit}}}, year = {{2001}}, } @inbook{40525, author = {{Bahr, C. and Kitzerow, Heinz-Siegfried}}, booktitle = {{Chirality in Liquid Crystals}}, editor = {{Bahr, C. and Kitzerow, H. }}, pages = {{1--27}}, publisher = {{Springer}}, title = {{{Chirality in Liquid Crystals: Introduction}}}, year = {{2001}}, } @inbook{40527, author = {{Kitzerow, Heinz-Siegfried}}, booktitle = {{Chirality in Liquid Crystals}}, editor = {{Bahr, C. and Kitzerow, H.}}, pages = {{296--354}}, publisher = {{Springer}}, title = {{{Twist Grain Boundary Phases}}}, year = {{2001}}, } @inbook{40550, author = {{Grotjahn, Rebecca}}, booktitle = {{Le Sacre. Musik – Ritus – Religiosität; Biennale Neue Musik Han­nover 2001}}, editor = {{Bergmeier, Hinrich }}, isbn = {{978-3-89727137-1}}, pages = {{143–156}}, publisher = {{Pfau}}, title = {{{Theologische Musik? Neue Musik? Messiaen, die evangelische Kirchenmusik und die Moderne}}}, year = {{2001}}, } @article{40548, author = {{Grotjahn, Rebecca}}, journal = {{Viva voce}}, pages = {{19–22}}, title = {{{Die Soubrette Antonie Held und ihr Kontrakt mit dem Hoftheater zu Hannover}}}, volume = {{59}}, year = {{2001}}, } @article{40549, author = {{Grotjahn, Rebecca}}, journal = {{Viva voce}}, pages = {{9--13}}, title = {{{Angelica Catalani – Das Bild der Diva}}}, volume = {{57/58}}, year = {{2001}}, } @inproceedings{40907, abstract = {{In reduced-rank signal processing for radar, sonar, and digital communications, we seek the right tradeoff between model bias and model variance for reconstructing signals from noisy data. Here, we extend the classical theory by considering the low-rank approximation of complex random vectors, which may or may not be proper. We show that, in general, widely linear approximation is superior to strictly linear approximation, unless the vector to be approximated is proper, in which case the optimum procedure is strictly linear. We analyze the case where the approximated random vector becomes proper in its internal coordinate system. This class of random vector, which we call generalized proper, possesses qualities similar to proper random vectors.}}, author = {{Schreier, Peter J. and Scharf, Louis L.}}, booktitle = {{Proc. 35th\ Asilomar Conf.\ Signals Syst.\ Computers}}, pages = {{597–601}}, title = {{{Low-rank approximation of improper complex random vectors}}}, doi = {{10.1109/ACSSC.2001.986993}}, volume = {{1}}, year = {{2001}}, } @article{34897, abstract = {{This paper announces the creation of a database for number fields. It describes the contents and the methods of access, indicates the origin of the polynomials, and formulates the aims of this collection of fields.}}, author = {{Klüners, Jürgen and Malle, Gunter}}, issn = {{1461-1570}}, journal = {{LMS Journal of Computation and Mathematics}}, keywords = {{Computational Theory and Mathematics, General Mathematics}}, pages = {{182--196}}, publisher = {{Wiley}}, title = {{{A Database for Field Extensions of the Rationals}}}, doi = {{10.1112/s1461157000000851}}, volume = {{4}}, year = {{2001}}, } @book{40153, author = {{Fuchs, Christian}}, publisher = {{Libri BOD}}, title = {{{Soziale Selbstorganisation im informationsgesellschaftlichen Kapitalismus (Social Self-Organization and Informational Capitalism)}}}, year = {{2001}}, } @article{26003, abstract = {{Long-chain n-alkylamine surfactants have been used as structure-directing agents in the synthesis of mesoporous aluminophosphates by a highly cooperative formation mechanism in an alcoholic system. Small amounts of water in the synthesis mixture play a significant role in the hydrolysis of the aluminum precursor (Al[OiPr]3) and are important for the quality of the mesostructured products. The materials exhibit disordered mesostructures, the stability and structural order of which can be improved by a postsynthetic thermal treatment. The products are then stable enough for the removal of the surfactant molecules by acidic solvent extraction, yielding surface areas up to 690 m2/g.}}, author = {{Tiemann, Michael and Schulz, Marcus and Jäger, Christian and Fröba, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{2885--2891}}, title = {{{Mesoporous Aluminophosphate Molecular Sieves Synthesized under Nonaqueous Conditions}}}, doi = {{10.1021/cm011044p}}, year = {{2001}}, } @article{26002, abstract = {{Over the past few years a growing number of scientists have dedicated their attention to the synthesis of mesostructured aluminophosphates following the concept of supramolecular structure direction. Their research has produced a large variety of synthetic approaches and yielded materials with various structural properties. Today a substantial number of publications have accumulated; this short review provides a general summary of the literature with the aim to display the opportunities for future work.}}, author = {{Tiemann, Michael and Fröba, Michael}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, pages = {{3211--3217}}, title = {{{Mesostructured Aluminophosphates Synthesized with Supramolecular Structure Directors}}}, doi = {{10.1021/cm0110371}}, year = {{2001}}, } @inbook{43303, abstract = {{This chapter focuses on the carrier interaction effects—that is, the many-body Coulomb correlations and their influence on band-gap semiconductor optical nonlinearities. The near band-gap semiconductor response is determined by the optical interaction with the resonant or near resonant material polarization that may result in the excitation of carriers (electron–hole pairs) and/or transient coherent nonlinearities. The microscopic analysis of these effects requires the investigation of the relevant quasi-particles and their interactions. Whereas the basic occurrence of a blue shift can be motivated already based on a simple two-level model, a more detailed understanding of the optical Stark effect in semiconductors requires a microscopic modeling of the relevant bands as well as the inclusion of the many-body Coulomb interaction. Compensations among the first- and higher-order Coulomb terms at the spectral positions of the exciton are obtained in the differential absorption induced by incoherent occupations.}}, author = {{Meier, Torsten and Koch, S.W.}}, booktitle = {{Ultrafast Physical Processes in Semiconductors}}, editor = {{Tsen, K.T.}}, isbn = {{978-0-12-752176-3}}, pages = {{231--313}}, publisher = {{Elsevier}}, title = {{{Coulomb correlation signatures in the excitonic optical nonlinearities of semiconductors}}}, doi = {{10.1016/S0080-8784(01)80172-1}}, volume = {{67}}, year = {{2001}}, } @article{43307, abstract = {{The influence of fifth-order coherences on the spectrally resolved four-wave mixing response of predominantly homogeneously broadened quasi-two-dimensional excitons is studied. Fifth-order signatures are discussed as a function of spectral position and excitation polarization. An exciton–biexciton beating for positive delay times is the dominant effect, which is pronounced at the exciton–biexciton transition for collinearly polarized excitation and at the exciton transition for cross-linearly polarized excitation. For negative delay times and collinearly polarized excitation a pronounced exciton–biexciton beating at the exciton resonance is observed that is vanishing for long negative delays owing to the faster dephasing in the two-exciton continuum compared with the bound biexciton state. These results are in qualitative agreement with microscopic model calculations that include the coherent dynamics of one- and two-exciton resonances up to the fifth order in the optical field.}}, author = {{Meier, Torsten and Langbein, W. and Koch, S.W. and Hvam, J.M.}}, journal = {{Journal of the Optical Society of America B}}, number = {{9}}, pages = {{1318--1325}}, publisher = {{Optical Society of America}}, title = {{{Spectral signatures of χ(5) processes in four-wave mixing of homogeneously broadened excitons}}}, doi = {{10.1364/JOSAB.18.001318}}, volume = {{18}}, year = {{2001}}, } @article{43306, abstract = {{Linear and nonlinear optical absorption spectra are studied theoretically for semiconductor nanorings penetrated by a magnetic field. Due to the Aharanov-Bohm effect the spectral position as well as the oscillator strength of the exciton change periodically as function of the magnetic flux enclosed by the ring. In the nonlinear differential absorption spectra it is found that the magnetic field strongly modifies Coulomb many-body correlations. In particular, the magnetic-field-induced increase of the exciton binding energy is accompanied by a decrease of the biexciton binding energy. The persistence of these effects in the presence of energetic disorder is analyzed.}}, author = {{Meier, Torsten and Thomas, P. and Koch, S.W.}}, journal = {{The European Physical Journal B - Condensed Matter and Complex Systems}}, pages = {{249--256}}, publisher = {{EDP sciences}}, title = {{{Linear and nonlinear optical properties of semiconductor nanorings with magnetic field and disorder-Influence on excitons and biexcitons}}}, doi = {{10.1007/s100510170133}}, volume = {{22}}, year = {{2001}}, }