La relation entre pensée et action stratégique a fait l’objet de plusieurs contributions dans le domaine de la stratégie et de l’organisation (Mintzberg 1990,1991 et 1996, Quinn 1980, Martinet 1993). D’autres articles (Morin 1989 e 1991, Le Moigne 1987 e 1995, Avenier 1992 e 1997, Martinet 1990, Colombo 1991) formulent le projet épistémologique de questionner la formation de la...
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This report presents basic data on the public financing of research and development in Switzerland from 1969 to 1998. Using the original data from the Swiss Federal Office for Statistics, the author has corrected and completed the time series for the different categories of expenditures, so that to allow for long-term comparison: the considered categories are the research of the public sector,...
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1390.
In this work, we solve a particular case of a standard problem of the theory of foliations which is to find conditions for the stability of a compact leaf. A compact leaf is stable if it possesses a fundamental system of neighborhoods saturated with respect to the equivalence relation defined by the leaves of the foliation. Since a lot of manifolds do not possess any foliation in the classical...
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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, 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.
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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Thèse de doctorat : Université de Fribourg : 2000 ; no 1302.
This thesis describes the development and the applications of four wave mixing techniques (Transient Grating (TG), Coherent Anti-Stokes Raman Scattering (CARS) and Transient Dichroism (TD)), to investigate processes taking place in the pico- and femtosecond time scales. In the first part of the work, the TG technique is described using both the holography and the nonlinear optics formalisms. The...
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Thèse de doctorat : Université de Fribourg : 2001 ; No 1364.
This thesis addresses the question of printed document recognition. We studied existing systems, first in a general context, by making the distinction between physical and logical structure recognition systems. Then, we focused on methods specific for complex layout documents and on methods having a learning aptitude. Since there do not seem to exist learning systems which are able to recognise...
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Thèse de doctorat : Université de Fribourg : 2003 ; 1403.
Many animals, including small invertebrates, have the capacity to modify their behaviour based on experience - they can learn. The ability to learn is itself a product of evolution, and the degree to which a given behaviour is modified by learning varies among species and among different types of behaviour. For an evolutionary biologist this raises the question of the conditions under which...
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Thèse de doctorat : Université de Fribourg : 1995 ; 1105.
We present in this thesis a uniform approach to recognize the physical structure of printed documents that may contain various kinds of blocks: we call such documents composite documents. After an introduction to the subject of this thesis, we present first the state of the art in the field of document recognition. In this part, we present models and standards used to represent document...
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