HAL - Normandie Université

    A note on the decomposability of inequality measures

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    International audienceWe propose a decomposition of inequality measures. By taking the example of the decomposition of income inequality by components, we show that this decomposition fits the definition of two elements: the sum of pure marginal contributions of income components and the sum of the pairwise interactions of all income components. This decomposition relies on the Shapley function and remains valid for a decomposition by subgroups and by components

    Étude de deux chartriers de laïcs en Basse-Normandie au Moyen Âge

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    International audienceLaymen were the main clients of late medieval notaries. The study of two lay archives from the region of Alençon reveals various reasons for keeping notarial contracts, seen as proof of constitution of estate, as a means of protecting family possessions, or as a tool of daily administration of personal relationships. In this context, the notary’s role was not limited to writing these documents. He also contributed to the proper functioning of local seigniorial powers: as a man of probity, he was an intermediary between contractees, his reputation serving the relations between lords and their dependents.Les laïcs constituent les principaux clients des notaires à la fin du Moyen Âge. L’étude de deux chartriers de laïcs, vivant dans la région d’Alençon, permet d’observer plusieurs volontés de conservation des actes notariés, entre preuves de la constitution d’un patrimoine foncier, sauvegarde des possessions familiales et gestion quotidienne des relations avec autrui. Le rôle du notaire dans ce contexte ne se limite pas à l’écriture de ces actes : en rédigeant des documents nécessaires à la gestion des domaines, il participe également à la bonne marche des seigneuries locales. Homme de probité, il est également un intermédiaire entre les contractants eux-mêmes, apportant son crédit aux relations entre seigneurs et dépendants

    Introduction

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    Révolution française et dé/centralisation

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    Remplacer la Terreur par la « terreur » pour mieux comprendre l’une et l’autre ?

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    Introduction

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    Differential Influence of Life Cycle on Growth and Toxin Production of three Pseudo‐nitzschia Species (Bacillariophyceae)

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    International audienceWe used a multistrain approach to study the intra‐ and interspecific variability of the growth rates of three Pseudo‐nitzschia species – P. australis, P. fraudulenta, and P. pungens – and of their domoic acid (DA) production. We carried out mating and batch experiments to investigate the respective effects of strain age and cell size, and thus the influence of their life cycle on the physiology of these species. The cell size – life cycle relationship was characteristic of each species. The influence of age and cell size on the intraspecific variability of growth rates suggests that these characteristics should be considered cautiously for the strains used in physiological studies on Pseudo‐nitzschia species. The results from all three species do not support the hypothesis of a decrease in DA production with time since isolation from natural populations. In P. australis, the cellular DA content was rather a function of cell size. More particularly, cells at the gametangia stage of their life cycle contained up to six times more DA than smaller or larger cells incapable of sexual reproduction. These findings reveal a link between P. australis life cycle and cell toxicity. This suggest that life cycle dynamics in Pseudo‐nitzschia natural populations may influence bloom toxicity

    Pour Jules Durand

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    International audienceIntroduction par John Barzma et Jean-Pierre Castelain au livreJohn Barzman et Jean-Pierre Castelain (dir),Jules Durand : un crime social et judiciaire,avec des contributions de Jean-Pierre Castelain, Pascal Reghem, Jean-François Lhuissier, Edouard Philippe, Elisabeth Robert-Barzman, John Barzman, Johann Fortier, Florence Montel, Anne Steiner, Jacques Defortescu, Henri Leclerc, Gilles Manceron, Marc Hédrich, Sonia Anton, Philippe Huet, Yoland Simon, Annette Haudiquet, Alain Gouiffes, Christiane Delpech
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