MetaDirectory und Pica: aktueller Stand

Workshop der Mitarbeiter der EDV-Abteilungen der wissenschaftlichen Bibliotheken in Thüringen am 10. Mai 2006, Weima

Optimal control of quasi-1D Bose gases in optical box potentials

In this paper, we investigate the manipulation of quasi-1D Bose gases that are trapped in a highly elongated potential by optimal control methods. The effective meanfield dynamics of the gas can be described by a one-dimensional non-polynomial Schr\"odinger equation. We extend the indirect optimal control method for the Gross-Pitaevskii equation by Winckel and Borzi (2008) to obtain necessary optimality conditions for state and energy cost functionals. This approach is then applied to optimally compress a quasi-1D Bose gase in an (optical) box potential, i.e., to find a so-called short-cut to adiabaticity, by solving the optimality conditions numerically. The behavior of the proposed method is finally analyzed and compared to simple direct optimization strategies using reduced basis functions. Simulations results demonstrate the feasibility of the proposed approach.Comment: 6 pages, 5 figures, 2 tables, accepted for IFAC World Congress 202

Verpackungsmaterial und Schmierstoffe aus nachwachsenden Rohstoffen : Tagungsband zur Veranstaltung des Zentrums für Europäische Wirtschaftsforschung und der Industrie- und Handelskammer-Karlsruhe am 23. Februar 1994 im Rahmen der IHK-Veranstaltungsreihe "Betrieblicher Umweltschutz"

Mit der 5. Novelle des Abfallgesetzes hat die Bundesregierung im Frühjahr 1993 den Entwurf eines Kreislaufwirtschafts- und Abfallgesetzes verabschiedet. Die Wirtschaft soll dadurch verstärkt die Verantwortung für die hergestellten Produkte über den gesamten Lebensweg wahrnehmen. Vor diesem Hintergrund veranstalteten das Zentrum für Europäische Wirtschaftsforschung und das Referat Energiewirtschaft und Umweltschutz der Industrie und Handelskammer Karlsruhe am 23. Februar 1994 im Rahmen der IHK-Veranstaltungsreihe "Betrieblicher Umweltschutz" ein Seminar zum Thema "Verpackungsmaterial und Schmierstoffe aus nachwachsenden Rohstoffen". Vertreter aus Forschung und Praxis referierten dabei über die Einsatzmöglichkeiten, die Umweltauswirkungen und die Wirtschaftlichkeit nachwachsender Rohstoffe im Verpackungs- und Schmierstoffmittelbereich

Verpackungsmaterial und Schmierstoffe aus nachwachsenden Rohstoffen: Tagungsband zur Veranstaltung des Zentrums für Europäische Wirtschaftsforschung und der Industrie- und Handelskammer-Karlsruhe am 23. Februar 1994 im Rahmen der IHK-Veranstaltungsreihe

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Optimizing optical potentials with physics-inspired learning algorithms

We present our new experimental and theoretical framework which combines a broadband superluminescent diode (SLED/SLD) with fast learning algorithms to provide speed and accuracy improvements for the optimization of 1D optical dipole potentials, here generated with a Digital Micromirror Device (DMD). To characterize the setup and potential speckle patterns arising from coherence, we compare the superluminescent diode to a single-mode laser by investigating interference properties. We employ Machine Learning (ML) tools to train a physics-inspired model acting as a digital twin of the optical system predicting the behavior of the optical apparatus including all its imperfections. Implementing an iterative algorithm based on Iterative Learning Control (ILC) we optimize optical potentials an order of magnitude faster than heuristic optimization methods. We compare iterative model-based offline optimization and experimental feedback-based online optimization. Our methods provide a new route to fast optimization of optical potentials which is relevant for the dynamical manipulation of ultracold gases.Comment: 10 pages, 5 figure

MMBnet 2017 - Proceedings of the 9th GI/ITG Workshop „Leistungs-, Verlässlichkeits- und Zuverlässigkeitsbewertung von Kommunikationsnetzen und Verteilten Systemen“

Nowadays, mathematical methods of systems and network monitoring, modeling, simulation, and performance, dependability and reliability analysis constitute the foundation of quantitative evaluation methods with regard to software-defined next-generation networks and advanced cloud computing systems. Considering the application of the underlying methodologies in engineering practice, these sophisticated techniques provide the basis in many different areas. The GI/ITG Technical Committee “Measurement, Modelling and Evaluation of Computing Systems“ (MMB) and its members have investigated corresponding research topics and initiated a series of MMB conferences and workshops over the last decades. Its 9th GI/ITG Workshop MMBnet 2017 „Leistungs-, Verlässlichkeits- und Zuverlässigkeitsbewertung von Kommunikationsnetzen und Verteilten Systemen“ was held at Hamburg University of Technology (TUHH), Germany, on September 14, 2017. The proceedings of MMBnet 2017 summarize the contributions of one invited talk and four contributed papers of young researchers. They deal with current research issues in next-generation networks, IP-based real-time communication systems, and new application architectures and intend to stimulate the reader‘s future research in these vital areas of modern information society

Next-Generation Satellite Communication Networks

This paper gives an overview of our recent activities in the field of satellite communication networks, including an introduction to geostationary satellite systems and Low Earth Orbit megaconstellations. To mitigate the high latencies of geostationary satellite networks, TCP-splitting Performance Enhancing Proxies are deployed. However, these cannot be applied in the case of encrypted transport headers as it is the case for VPNs or QUIC. We summarize performance evaluation results from multiple measurement campaigns. In a recently concluded project, multipath communication was used to combine the advantages of very heterogeneous communication paths: low data rate, low latency (e.g., DSL light) and high data rate, high latency (e.g., geostationary satellite)

Towards a 5G Satellite Communication Framework for V2X

In recent years, satellite communication has been expanding its field of application in the world of computer networks. This paper aims to provide an overview of how a typical scenario involving 5G Non-Terrestrial Networks (NTNs) for vehicle to everything (V2X) applications is characterized. In particular, a first implementation of a system that integrates them together will be described. Such a framework will later be used to evaluate the performance of applications such as Vehicle Monitoring (VM), Remote Driving (RD), Voice Over IP (VoIP), and others. Different configuration scenarios such as Low Earth Orbit and Geostationary Orbit will be considered