Thèse de doctorat : Université de Fribourg, 2021.
Measurement is fundamental in science. Social sciences generally and psychology, in particular, depend on objective, valid, and reliable psychometric scales. In the 20th century, the psychology of religion and spirituality spent a long time searching for comprehensive and trustworthy instruments to assess psychological constructs in the field of empirical studies of religion and spirituality....
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Thèse de doctorat : Université de Fribourg, 2015.
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Thèse de doctorat : Université de Fribourg, 2010.
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Thèse de doctorat : Université de Fribourg, 2002 ; no 1367.
The Mott metal-insulator transition is investigated as a quantum phase transition. The U - t - t’ model at half-filling is considered as a paradigm; the sign of t’ is not relevant and is taken to be positive. The phase diagram presents two Mott insulating phases with distinct symmetries and one global metallic phase which is presumed to be a Luttinger liquid for the charge degrees of freedom....
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Thèse de doctorat : Université de Fribourg, 2007 ; Nr. 1575.
The possibilities of industry to process and to engineer materials at the nanometer level rapidly increase and products using materials engineered at the nanometer level emerge on the markets. In the long term, it is hardly possible to estimate, from the present point, where the ability to engineer materials on the nano-scale will lead human beings, whether the dream of a molecular nanotechnology...
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Thèse de doctorat : Université de Fribourg, 2008.
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Thèse de doctorat : Université de Fribourg, 2004 ; no 1440.
Nanotechnology, a research area that covers many scientific disciplines such as Medicine, Biology, Physics and Chemistry has found a great interest in research institutions and wide applications in industries. This is due to many reasons; from these we note the control down to the molecular level providing thereby a greatest efficiency and an important added value as a reason of the low cost of...
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Thèse de doctorat : Université de Fribourg, 2021.
Ce travail s’intéresse au sentiment de sécurité des élèves au sein d’un groupe- classe. Une telle notion a été forgée à partir de celle de sécurité psychologique introduite dans le milieu organisationnel pour comprendre le fonctionnement des dynamiques de groupe à partir des perceptions qu’ont les individus les uns vis-à-vis des autres (Edmondson, 1999, 2003a, 2008)....
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Thèse de doctorat : Université de Fribourg, 2007.
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Thèse de doctorat : Université de Fribourg, 2004.
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