Evolutionary biologists studying sexually selected bird plumage generally consider this trait to be static throughout a breeding season and assign trait values to individuals on the basis of single measurements. We investigated the propensity for carotenoid-based color of feather patches in male house finches (Carpodacus mexicanus (Muller, 1776)) to change during the breeding period. We recaptu...

In this paper, we investigate the revision issue for argumentation systems à la Dung. We focus on revision as minimal change of the arguments status. Contrarily to most of the previous works on the topic, the addition of new arguments is not allowed in the revision process, so that the revised system has to be obtained by modifying the attack relation, only. We introduce a language of revision ...

FERMETURES D’HÔPITAUX, régionalisation et autres initiatives de réforme des soins de santé posent de nouveaux défis aux campagnes de financement. Comme les fonds publics diminuent, on doit se tourner davantage vers la philanthropie, mais dans le climat actuel d’incertitude et de changement, les particuliers comme les entreprises surveillent de près leurs dons, a-t-on dit aux participants à une ...