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Université de Fribourg

L'élaboration du projet de vie chez les jeunes adultes

Ibarra Arana, Claudia Elena ; Reicherts, Michaël (Dir.) ; Retschitzki, Jean (Codir.)

Thèse de doctorat : Université de Fribourg, 2006.

Cette recherche propose un modèle heuristique des processus de fonctionnement subjectifs, motivationnels et normatifs impliqués dans l'élaboration du projet de vie des jeunes adultes. Le modèle a été développé sur deux plans. D'abord, on considère le rôle des perspectives temporelles (Zimbardo Hinz, 2000; Nuttin, 1980), des buts personnels (cf. Brunstein ...

Université de Fribourg

Synthesis of carbon nanotubes on La0.6Sr0.4CoO₃ as substrate

Thiele, Doreen ; Colmenarejo, E. Lopez-Camacho ; Grobéty, Bernard ; Züttel, Andreas

In: Diamond and Related Materials, 2009, vol. 18, no. 1, p. 34-38

A carbon nanotube/perovskite composite material was developed as material for air electrodes in fuel cells or zinc-air batteries. For this purpose, carbon nanotubes were directly grown on the perovskite La0.6Sr0.4CoO₃ impregnated with Fe solution which acted as substrate. The synthesis was carried out in a fluidised bed reactor. The carbon source was acetylene. The...

Université de Fribourg

Empirical analysis on temporal statistics of human correspondence patterns

Li, Nan-Nan ; Zhang, Ning ; Zhou, Tao

In: Physica A: Statistical Mechanics and its Applications, 2008, vol. 387, no. 25, p. 6391-6394

Recently, extensive empirical evidence shows that the timing of human behaviors obeys non-Possion statistics with heavy-tailed interevent time distribution. In this paper, we empirically study the correspondence pattern of a great Chinese scientist, named Hsue-Shen Tsien. Both the interevent time distribution and response time distributions deviate from the Poisson statistics, showing an...

Université de Fribourg

Postmortem changes in the neuroanatomical characteristics of the primate brain: Hippocampal formation

Lavenex, Pierre ; Lavenex, Pamela Banta ; Bennett, Jeffrey L. ; Amaral, David G.

In: The Journal of Comparative Neurology, 2009, vol. 512, no. 1, p. 27 - 51

Comparative studies of the structural organization of the brain are fundamental to our understanding of human brain function. However, whereas brains of experimental animals are fixed by perfusion of a fixative through the vasculature, human or ape brains are fixed by immersion after varying postmortem intervals. Although differential treatments might affect the fundamental characteristics of the...

Université de Fribourg

X-ray study of structural domains in the near-surface region of SrTiO₃ substrates with Y0.6Pr0.4Ba₂Cu₃O₇/La2/3Ca1/3MnO₃ superlattices grown on top

Hoppler, Justin ; Stahn, J. ; Bouyanfif, Houssny ; Malik, Vivek Kumar ; Patterson, B. D. ; Willmott, P. R. ; Cristiani, G. ; Habermeier, H.-U. ; Bernhard, Christian

In: Physical Review B, 2008, vol. 78, no. 13, p. 134111

We investigated with synchrotron x-ray diffraction and reflectometry the formation of structural domains in the near-surface region of single crystalline SrTiO₃ (001) substrates with Y0.6Pr0.4Ba₂Cu₃O₇/La2/3Ca1/3MnO₃ superlattices grown on top. We find that the antiferrodistortive cubic to tetragonal transition, which occurs at...