201 research outputs found

    Entwicklung eines Verfahrens zur Herstellung piezoelektrischer Polymer-Duennschichtwandler Abschlussbericht

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    SIGLEAvailable from TIB Hannover: F04B1039 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung, Berlin (Germany)DEGerman

    Nutzung externer Datenbanken durch die Hochschulen in den neuen Bundeslaendern Erfolgskontrollbericht. Schlussbericht

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    SIGLEAvailable from TIB Hannover: DtF QN1(33,43) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

    Emerging database research in East Europe. Proceedings of the pre-conference workshop of VLDB 2003

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    SIGLEAvailable from TIB Hannover: RR 8073(2003,14) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

    RTM Untersuchungen an zweidimensionalen Nanostrukturen am Beispiel der reinen Au(100)-Oberflaeche und des selbstassemblierten Systems Sauerstoff auf Cu(110)

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    In this STM study, nanostructures on metallic single crystals are observed under UHV conditions. The aim of the work at the Au(100)-surface is to evaluate an energetic quantity, namely the step free energy, from a topographic structure information. Adatom and vacancy islands are produced on the tempered reconstructed Au(100)-surface by evaporation of submonolayer quantities of gold and sputtering with Argon ions, respectively. The decay of these islands is correlated with a decrease of the aspect ratio to approximately 1. After that the aspect ratio varies merely stochastically around this mean value. We could observe adatom islands at T=353 K, which neither grow nor decay over a long period of time and whose aspect ratio varies stochastically around the mean value of 1. In conclusion, we assume that these islands are in a thermodynamic equilibrium situation or at least close to it. By averaging over these island shapes, we obtain the equilibrium shape for this temperature. From island shape fluctuations we make a quantitative determination of the mean step free energy to 170 meV per atom. In completely separated experiments from the described ones above, the formation of the so-called (2 x 1) oxygen stripe phase on Cu(110) is imaged in situ, and simultaneously a quantitative determination of the induced surface stress is accomplished. (orig.)SIGLEAvailable from: http://deposit.ddb.de/cgi-bin/dokserv?idn=973322225 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

    Entwicklung von Labormethoden zur Prognose des mikrobiellen Selbstreinigungspotentials kontaminierter Grundwaesser und Boeden

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    Laboratory methods will be developed and optimised for assessing the microbiological background potential and forecasting the possible course of biological self-cleaning processes. A microcosmos experiment with batch cultures will provide information on reaction conditions, preferably by measurements of external parameters like CO2 production and O2 consumption of the microbial breathing processes. The need for further parameters for validating the test will be checked. The results of the short-term and long-term breathing tests with soil samples taken in different depths of a well and long-term breathing tests with groundwater will provide information on the self-cleaning potential of a given site.Es sollen Labormethoden entwickelt und optimiert werden, mit denen das mikrobiologische Potential im Untergrund abgeschaetzt werden kann und die eine Prognose ueber den moeglichen Ablauf von biologischen Selbstreinigungsprozessen erlauben. Dies soll auf der Grundlage von Batch-Kulturen als Mikrokosmosversuch erfolgen, um die Einstellung und den direkten Vergleich verschiedener Reaktionsbedingungen zu ermoeglichen. Der Versuchsverlauf soll vorzugsweise ueber die Messung externer Parameter wie der CO2-Produktion und dem O2-Verbrauch der mikrobiellen Atmungsprozesse zu beobachten sein bzw. bei anoxischen Versuchsbedingungen ueber den Elektronenakzeptorverbrauch; ferner soll die Notwendigkeit weiterer Parameter zur Validierung der Testaussage ueberprueft werden. Abschliessend soll durch den Vergleich der Ergebnisse der Kurzzeit- und Langzeitatmungstests mit Bodenproben aus verschiedenen Tiefen eines Brunnens sowie der Langzeitatmungstests mit Grundwasser eine Prognose ueber das Selbstreinigungspotential eines Standortes moeglich werden.SIGLEAvailable from: http://deposit.ddb.de/cgi-bin/dokserv?idn=966050681 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

    Entwicklung photosensitiver Polymernetzwerke mit Formgedaechtniseigenschaften

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    In the present thesis a polymer system with shape-memory properties is developed. The shape-memory effect is triggered by irradiation of the polymer with UV-light with different wavelength. The irradiation causes a reversible change of network density of the elastomer. By that, the elastic properties of the material are changed in a way that the fixing of a temporary shape by UV-irradiation is possible. Irradiation of the fixed sample with another UV-light releases the fixing and the permanent shape of the polymer sample is recovered. The light triggered one-way shape-memory effect for polymers has been realized for the first time.SIGLEAvailable from: http://www.deposit.ddb.de/cgi-bin/dokserv / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

    Charakterisierung von Elastomeren mittels dynamischer Indentation und vergleichender Methoden

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    This doctor thesis presents the indentation method, and its application for elastomer testing is demonstrated using NR/SBR systems. The data of the indentation measurements and force/indentation diagrams are evaluated, faults and artefacts as well as effects of temperature and fillers are considered, and NMR and DMTA measurements have been carried out to confirm the results.SIGLEAvailable from: http://sylvester.bth.rwth-aachen.de/dissertationen/2002/107/index.htm / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
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