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Implementation of a setup for broadband femtose...
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Bachelor Thesis from the year 2013 in the subject Physics - Electrodynamics, grade: 1,1, Free University of Berlin (Fakultät für Physik), language: English, abstract: It is the intention of this thesis to firstly present a theoretical modelling of how 400-nm pump pulses can be generated from a 800-nm fundamental, yielding the shortest possible pulses at a high conversion efficiency. Secondly, I describe how three different types of optical autocorrelation and the information about the pulse spectra and durations they incorporate can be used to characterise our present pulse amplification system. Thirdly, I will present a newly-implemented transient absorption setup which has been distinguished with respect to its noise sensitivity and to the chirp the probe beam accumulates after the supercontinuum generation process. Finally, I will discuss the transient absorption signature of a biomimetic photoswitch (dMe-MeO-NAIP) recorded with the new setup.Since its beginnings in the late 1980s, ultrafast laser spectroscopy and, in particular, transient absorption has become a standard experimental method. It allows to investigate the photochemical properties of molecules with a temporal resolution down to the femtosecond timescale. However, major challenges for the implementation of a transient absorption setup continue to be the maintenance of pulse durations as short as possible and, on the other hand, noise prevention.

Anbieter: Dodax
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Electroweak Interactions
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The papers contained in this volume are invited lec tures presented at the 21st "Universit~tswochen fUr Kern physik" in Schladming in February 1982. To consider electro magnetic and weak interactions as manifestations of a single theory is a standpoint, which is generally accepted by now. The goal of the school was to outline the present state of this unified theory and to discuss possible future developments. Thanks to the generous support provided by the Austrian Ministry of Science and Research, the Styrian Government and other sponsors, it was again possible to invite experts in the field as lecturers. The lecture notes have been reexamined by the authors and are now published in their final form to enable a larger number of physicists to profit from them. Since the lectures are already quite voluminous, we have decided to restrict the publication to the lectures themselves and omit all seminars, interesting as they were, as well as all details connected with the meeting. It is a pleasure to thank all the lecturers for their efforts, making it possible to speed up publication. Thanks are also due to L. Pittner for organisation and proof-reading as well as to Mrs. Krenn and Mrs. Neuhold for the careful typing of the papers. H. Mitter Acta Physica Austriaca, Suppl. XXIV, 3-62 (1982) © by Springer-Verlag 1982 INTRODUCTION TO GAUGE THEORIES OF ELECTRO + WEAK INTERACTIONS by G. ECKER Institut fUr Theoretische Physik Universitat Wien, Austria TABLE OF CONTENTS I.

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Topology in Molecular Biology
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The contents of this book focus on the recent investigations in molecular bi- ogywhereapplicationsoftopologyseemtobeverystimulating. Thevolumeis based on the talks and lectures given by participants of the three-month p- gram TopologyinCondensedMatter ,whichwasheldintheMaxPlanck- stitut fur Physik komplexer Systeme, Dresden, Germany, 8May 31July 2002, under the scienti?c direction of Professors M. Kl eman, S. Novikov and - self. The aim of this program was to discuss recent applications of topology to several areas in condensed matter physics and molecular biology. The ?rst volume Topology in Condensed Matter is concerned with m- ern applications of geometrical and topological techniques to such new and classic ?elds of physics like electron theory of metals, theory of nano-crystals, aperiodic and liquid crystals, quantum computation and so on. This volume is published simultaneously in Springer Series in Solid-State Physics . The present volume gives an exposition of the role of topology in the theory of proteins and DNA. The last thirty years a?rmed very e?cient - plications of modern mathematics, especially topology, in physics. The union of mathematics and physics was very stimulating for both sides. On the other hand, the impact of mathematics in biology has been rather limited. H- ever here also some interesting results were obtained. In particular, there are applications of knot theory in the theory of circular closed DNA. The - cent discoveries in molecular biology indicate future successful applications of topology.

Anbieter: Dodax
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Robert Döpel
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High Quality Content by WIKIPEDIA articles! Georg Robert Döpel (3 December 1895 in Neustadt 2 December 1982 in Ilmenau) was a German experimental nuclear physicist. He was a participant in a group known as the first Uranverein, which was spawned by a meeting conducted by the Reichserziehungsministerium, in April 1939, to discuss the potential of a sustained nuclear reaction. He worked under Werner Heisenberg at the University of Leipzig, and he conducted experiments on spherical layers of uranium oxide surrounded by heavy water. He was a contributor to the German nuclear energy project (Uranverein). In 1945, he was sent to Russia to work on the Soviet atomic bomb project. He returned to Germany in 1957, and he become professor of electrical engineering and director of the Institut für Angewandte Physik at the Hochschule für Elektrotechnik.

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Interstellar Magnetic Fields
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The subject of interstellar magnetic fields is of increasing interest to both observational and theoretical astronomers. Consequently, it was opportune for both groups to convene and discuss the current state of research and future prospects. For this purpose, the Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. generously provided its unique conference centre SchloB Ringberg. The scientific organising committee consisted of Profs. W. Hillebrandt (Max-Planck-Institut fUr Physik und Astrophysik, Munchen) and R. Wielebinski (Max-Planck-Institut fUr Radioastronomie, Bonn). The lo cal organising committee comprised Gabriele Breuer (conference secretary) and the Editors. ' These proceedings summarise the lectures and short contributions pre sented at the workshop. Although extremely productive, the discussions could not, unfortunately, be included. We thank the staff of the castle, and especially its administrator, Mr. Hormann, for providing the excellent environment conducive to smooth run ning of the conference. We acknowledge the Max-Planck-Gesellschaft for its support in financing the workshop. Thanks are also due to all participants for their enthusiasm and (generally!) prompt submission of manuscripts. Last but not least, we thank Gabriele Breuer for her invaluable help before, dur ing and after the days at SchloB Ringberg. She skillfully typed and retyped many of the manuscripts for these proceedings and unstintingly performed last minute corrections. We hope that some of the ideas presented here will stimulate further discussion and research in this area. R.Beck Bonn, December 1986 R. Grave v 1 Arp, H. 15 Kundt, W. 29 Furst, E. 2 Grave, R. 16 Aly, J.J.

Anbieter: Orell Fuessli CH
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Plant Hormone Receptors
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The Nato Advanced Research Workshop on Plant Hormone Receptors was held at the Physik Zentrum in Bad Honnef near Bonn, August 18-22, 1986. This workshop was mainly supported by the Nato Scientific Affairs Division and additionally cosponsered by Hoechst AG, Frankfurt and BASF AG, Ludwigshafen. The workshop aimed at focusing research on plant hormone recep tors. It should provide an opportunity to all who work in this field to report on their very recent data and to discuss their results with the most competent' colleagues. The total number of participants was limited to 30 to ensure personal contact and intensive discussions. Everyone had to either give a lecture or practical course. One half of the participants were invited, the other was selected by applications. Plant hormone receptors are assumed to exist but clear results are still rare. Nevertheless encouraging results have been published over the last years. Receptors for animal hormones and neuronal transmitters are well characterized, both structu rally and functionally. Therefore scientists dealing with recep tors for steroid hormones - Prof. E.E. Baulieu, Paris and Prof. J. R. Gustafsson, Huddinge - and for acetylcholine - Prof. A. Maelicke, Dortmund - were invited to participate in the workshop.

Anbieter: Thalia AT
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Interstellar Magnetic Fields
89,99 € *
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The subject of interstellar magnetic fields is of increasing interest to both observational and theoretical astronomers. Consequently, it was opportune for both groups to convene and discuss the current state of research and future prospects. For this purpose, the Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. generously provided its unique conference centre SchloB Ringberg. The scientific organising committee consisted of Profs. W. Hillebrandt (Max-Planck-Institut fUr Physik und Astrophysik, Munchen) and R. Wielebinski (Max-Planck-Institut fUr Radioastronomie, Bonn). The lo cal organising committee comprised Gabriele Breuer (conference secretary) and the Editors. ' These proceedings summarise the lectures and short contributions pre sented at the workshop. Although extremely productive, the discussions could not, unfortunately, be included. We thank the staff of the castle, and especially its administrator, Mr. Hormann, for providing the excellent environment conducive to smooth run ning of the conference. We acknowledge the Max-Planck-Gesellschaft for its support in financing the workshop. Thanks are also due to all participants for their enthusiasm and (generally!) prompt submission of manuscripts. Last but not least, we thank Gabriele Breuer for her invaluable help before, dur ing and after the days at SchloB Ringberg. She skillfully typed and retyped many of the manuscripts for these proceedings and unstintingly performed last minute corrections. We hope that some of the ideas presented here will stimulate further discussion and research in this area. R.Beck Bonn, December 1986 R. Grave v 1 Arp, H. 15 Kundt, W. 29 Furst, E. 2 Grave, R. 16 Aly, J.J.

Anbieter: Thalia AT
Stand: 02.12.2020
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