Thèse de doctorat : Université de Fribourg, 2002 ; no 1375.
In the distal part of the Swiss Molassic basin, a typical foreland basin, the Jura Molasse is trapped within different synclines. This study focused on the paleogene deposits present in these synclines and as well as in the south border of the Graben. All formations mentionned in the literature were identified and a hiearchy was established. Each formation was defined and fixed on the...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1380.
A detailed sedimentological, sequential and cyclostratigraphic interpretation of the Kimmeridgian in the Swiss Jura defines the principal factors which control the different stages in the development of a shallow-water carbonate platform. A comparative study in the Vocontian Basin reveals their impact on hemipelagic and pelagic sedimentation. The sedimentary facies of three platform sections –...
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Thèse de doctorat : Université de Fribourg, 1999 ; no 1281.
Economy and territory are interdependent elements of the regional development process. These two components, indissociable from a region’s economic development, are taken into account in recent theories of regional science. Yet, after closer examination, the operational concepts developed in these theories prove to be limited. Although territory is perceived as having multiple aspects,...
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Thèse de doctorat : Université de Fribourg, 2001 ; no 1341.
The aim of this thesis is the study of several effects which influence photoinduced electron transfer or charge recombination, but are not connected to the free energy driving force. A large number of experimental techniques have been used, such as photoelectron spectroscopy for the measurement of ionization potentials, multiplex transient grating for the study of kinetics in the sub-picosecond...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1395.
Slope instabilities such as mudflows, debris flows or landslides have lately raised much concern in Switzerland, since various major events have occurred during the last decade, resulting in major landscape disturbances, as well as costly damage to infrastructure. This demonstrated the necessity to better understand the causes and dynamics of such processes. This research work aims at defining...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1398.
After the discovery by R. Kroto and H. Smalley of fullurene like the C60 [1], S. Iijima discovered six year later an other allotropic form of carbon namely the nanotubes [2]. From 1991 the scientists investigated many different synthesis process in order to obtain fullerenes as carbon nanotubes (CNT) with various ratio and physical properties. Due to the mechanical and electrical characteristics...
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Thèse de doctorat : Université de Fribourg, 2005.
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Thèse de doctorat : Université de Fribourg, 2002.
Centrée sur les représentations et les pratiques d'utilisation du jeu au préscolaire, cette thèse s'inscrit dans le processus de réforme de l'enseignement au préscolaire, tel qu'amorcé récemment par le ministère de l'Éducation du Québec. Celle-ci fait également suite aux changements récents apportés par le ministère de la Famille et de l'Enfance au regard de la modélisation des...
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In: Bulletin des Sciences Mathématiques, 2004, vol. 128, p. 739-748
In this article we give two new infinite sequences of perfect non-extremal Riemann surfaces of genus bigger than six. The first sequence consists of weakly eutactic perfect surfaces; the second one of semi-eutactic perfect surfaces.
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Thèse de doctorat : Université de Fribourg, 2004.
This dissertation contributes to the academic literature by examining two issues in relation to corporate Internet disclosure. First, we make a detailed content analysis of the investor relation section on the Web sites of US companies to gain insight into the type and amount of information provided to investors on corporate Web sites and to establish a measure of the Internet disclosure level....
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