Thèse de doctorat : Université de Fribourg, 2005.
This thesis focuses on two themes: a methodological and a decision making one. The methodological part introduces the development of a computerized information search tool. The program, called WebDiP (Web Decision Processes), enables the researcher to track participants while they are searching for information in a database. An experiment can be done either in the laboratory or on the Web. The...
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Thèse de doctorat : Université de Fribourg, 1999 ; no 1256.
The factors influencing the production and deposition of carbonate sediments are known. These are namely accommodation variations (eustasy and tectonics), siliciclastic sediment input, environmental changes (temperature, salinity, trophic level), nature of the producing ecologies, and the hydrodynamic regime. However, the manner in which these factors integrate through time to produce the...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1386.
Alle eukaryontischen Zellen benötigen für die Sekretion ein funktionierendes endomembranes System. Proteine, die sekretiert werden besitzen ein Signalpeptid und werden am Endoplasmatischen Retikulum (ER) synthetisiert. Das Signalpeptid initiiert den Transport in den Lumen des ER und wird danach enzymatisch vom Protein abgetrennt. Korrekt gefaltete Proteine werden in Vesikel gepackt, die sich...
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Thèse de doctorat : Université de Fribourg, 2003 ; no 1409.
Die onkogenischen Transkriptionsfaktoren E2F und Myc binden spezifische DNS-Sequenzen zu unterschiedlichen Zeitpunkten während des Zellzyklus, und regulieren Transkription von vielen unterschiedlichen Genen. Sowohl E2F als auch Myc assoziieren mit TRRAP, einer Komponente von mindestens zwei verschiedenen macromolekularen Protein-Komplexen, welche die Histon-Acetyl-Transferasen (HAT) Gcn5/PCAF...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1393.
Diese Dissertation behandelt drei fundamentalen Problemen, die im Umfeld von Ubiquitous Computing und Web-Diensten auftreten. Es handelt sich um Heterogenität sowie statische und dynamische Konfiguration. Das Heterogenitätsproblem wird definiert und anhand von Beispielen in den Bereichen Anwendungen, Middleware, Kommunikation und Hardware illustriert. Anschliessend werden die heute verwendeten...
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Thèse de doctorat : Université de Fribourg, 2002 ; No 1370.
In order to better understand the Phytophthora-plant interaction, we have developed a new pathosystem: Arabidopsis thaliana-Phytophthora porri. At present, the best studied Phytophthora species is P. infestans which caused the dramatic Irish late blight epidemics 150 years ago. Studying the pathosystem Phytophthora infestans-Solanum tuberosum has certain advantages mainly because potato is an...
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Thèse de doctorat : Université de Fribourg, 1999 ; no 1272.
This thesis introduces a methodological approach to artificial agent design. In an attempt to solve the symbol grounding problem of artificial intelligence, a new theoretical perspective on the agent-environment relation is explored and experimentation is led to motivate this methodology. From the original idea that in order to ground an agent in an environment, the agent’s representation...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1392.
The future multi-layer optical networks based on wavelength division multiplexing technology will lead to the creation of new value-added optical services, which is bound to transform the traditional passive transport network into an active and intelligent transport layer. The successful deployment of these complex networking services and the possibility of subjecting them to a dynamic control,...
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Thèse de doctorat : Université de Fribourg, 2003 ; no 1399.
Three different parts related to experimental Atomic Physics are contained in the present Ph. D. thesis. In the three projects the measurements were performed by means of high-resolution x-ray spectroscopy, using a reflecting von Hamos-type bent crystal spectrometer. This experimental technique represents thus the common denominator of the three projects. The two first parts of the thesis are...
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Thèse de doctorat : Université de Fribourg, 2000 ; no 1314.
One of the goals of gamma-ray spectroscopy is to study the structure of the atomic nuclei. To this aim, the nucleus has to be brought into excited states by a nuclear reaction. The study of the subsequent electromagnetic decay via the measurement of γ rays then allows one to establish the level scheme of the atomic nucleus. The comparison of this scheme with a theoretical model allows a better...
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