860 research outputs found
Étude d'un gène de nanisme lié au sexe chez la poule. IV. – Observations sur la croissance et les caractéristiques de carcasse du jeune poulet
International audienc
Robustness of the European power grids under intentional attack
The power grid defines one of the most important technological networks of
our times and sustains our complex society. It has evolved for more than a
century into an extremely huge and seemingly robust and well understood system.
But it becomes extremely fragile as well, when unexpected, usually minimal,
failures turn into unknown dynamical behaviours leading, for example, to sudden
and massive blackouts. Here we explore the fragility of the European power grid
under the effect of selective node removal. A mean field analysis of fragility
against attacks is presented together with the observed patterns. Deviations
from the theoretical conditions for network percolation (and fragmentation)
under attacks are analysed and correlated with non topological reliability
measures.Comment: 7 pages, 4 figure
Déterminisme héréditaire du caractère « crête pâle » chez la poule
International audienc
Étude d'un gène de nanisme lié au sexe chez la poule. VI. – effets du gène dw sur le comportement agonistique du jeune coq
International audienc
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