Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Pierre MorelEtienne GravierNicolas BesseR. KleinA. GhizzoPierre BertrandXavier GarbetPhilippe GhendrihVirginie GrandgirardYanick Sarazin
• Organismes : Laboratoire de physique des milieux ionisés et applications Institut Jean Lamour Institut Élie Cartan de Nancy Scientific computation and visualization Laboratoire de physique des milieux ionisés et applications Association EURATOM-CEA Institut de Recherche sur la Fusion par confinement Magnétique Institut de Recherche sur la Fusion par confinement Magnétique Département de Recherche sur la Fusion Contrôlée
• Publié dans Physics of Plasmas le 02/11/2020

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Résumé : Predicting turbulent transport in nearly collisionless fusion plasmas requires one to solve kinetic (or, more precisely, gyrokinetic) equations. In spite of considerable progress, several pending issues remain; although more accurate, the kinetic calculation of turbulent transport is much more demanding in computer resources than fluid simulations. An alternative approach is based on a water-bag representation of the distribution function that is not an approximation but rather a special class of initial conditions, allowing one to reduce the full kinetic Vlasov equation into a set of hydrodynamic equations while keeping its kinetic character. The main result for the water-bag model is a lower cost in the parallel velocity direction since no differential operator associated with some approximate numerical scheme has to be carried out on this variable v∥. Indeed, a small bag number is sufficient to correctly describe the ion temperature gradient instability.

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• Type de publi. :
• Date de publi. : 01/01/2007
• Auteurs : Jean-Yves SalpinRiccardo SpeziaMarie-Pierre GaigeotJeanine TortajadaD. ScuderiJoël LemairePhilippe Maıtre
• Organismes : Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement Laboratoire de Chimie Physique D'Orsay Laboratoire de Chimie Physique D'Orsay Laboratoire de Chimie Physique D'Orsay

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2007
• Auteurs : Jean-Pierre ChauveauJean-Philippe Colin
• Organismes : Marchés, Organisations, Institutions et Stratégies d'Acteurs Institut de Recherche pour le Développement Marchés, Organisations, Institutions et Stratégies d'Acteurs Institut de Recherche pour le Développement

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Résumé : This chapter studies changes in institutional arrangements for the transfer of land rights, both between groups and between individuals, in Benin, Burkina Faso, Ivory Coast and Mali. Mechanisms for the transfer of land rights range from short-term to permanent transfers, from partial to complete transfers, and from nonmonetarised arrangements embedded in social relations to market transactions. The chapter documents both changes in “customary”, non-monetarised arrangements (namely the tutorat” relationship); and the emergence of monetarised transactions, particularly land sales. While, conceptually, clear differences exist between “tutorat” arrangements (in which land transfers are embedded within a broader socio-political relationship and entail a continuing duty of gratitude and of allegiance toward the customary land holders) and sales (which are monetarised deals that do not entail a continuing relationship once the transaction is completed), in practice boundaries may be blurred, as tutorat arrangements are becoming monetarised and market transactions are nonetheless embedded in social relations.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2007
• Auteurs : Philippe BallonJean-Pierre HamardM. Le CorreK. SjöbergT. Rooke
• Organismes : Écosystèmes forestiers Écosystèmes forestiers Écosystèmes forestiers Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet

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Résumé : A regional survey of deer damage in coppice woodland was carried out in central France during 2005/2006. In our study area, from 1970 till now, the red deer population has been increasing in both geographical distribution and in absolute number. Re-growth of coppice shoots after felling was assessed at 4 different periods (P1: 1979, P2: 1991, P3: 2001 and P4: 2002-2005). We identified recent cutting stands for P1, P2 and P3 periods using aerial photographs of our study site. From all the forest compartments subjected to felling (n=883), a selection of 253 stands were sampled, respectively n = 42 for P1, n = 90 for P2, n = 80 for P3 and n = 41 for P4. 50 stools were assessed at each stand and their main characteristics have been recorded, including the tree species, the number of shoots, the proportion of damaged shoots, the height and the vitality. We also recorded some basic information as the size of the compartment, the basal area of both coppice and standards and the possible presence of seedlings. The use of aerial photographs and photo-interpretation appear to be good tools to assess damages to newly grown shoots in coppice woodlands. Our results suggest a strong effect of the period at which the coppice was cut. During the period P1, the low deer browsing pressure did not seem to threaten the success of the coppice re-growth. The most obvious effect of browsing pressure was the change in vegetation structure between P1 and P2/P3. Among the coppice species themselves, chestnut stools suffer little damage compared to oak stools which consistently suffer extensive damage. Stool mortality due to browsing was also depending on the coppice species. Oak and birch were the most prone to mortality at the difference of chestnut.

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2007
• Auteurs : Jean-Philippe Pernin
• Organismes : Modèles et Technologies pour l’Apprentissage Humain

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Sophie Mac-MaryJean-Marie SainthillierCarol CourderotmasuyerPierre CreidiPhilippe Humbert
• Organismes : Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) Bioexigence Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098)
• Publié dans European Journal of Dermatology le 30/10/2020

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2007
• Auteurs : Philippe Bordes
• Organismes : Art, images, sociétés

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Juliette RavauxJean-Yves ToullecNelly LégerPhilippe LopezFrançoise GaillB Shillito
• Organismes : Systématique, adaptation, évolution Systématique, adaptation, évolution Systématique, adaptation, évolution Systématique, adaptation, évolution Systématique, adaptation, évolution
• Publié dans Gene le 26/10/2020

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2007
• Auteurs : Pierre FretonJean Jacques GonzalezPhilippe TeuletAlain Gleizes
• Organismes : Arc Electrique et Procédés Plasmas Thermiques Arc Electrique et Procédés Plasmas Thermiques Arc Electrique et Procédés Plasmas Thermiques Centre interuniversitaire de recherche et d'ingénierie des matériaux LAboratoire PLasma et Conversion d'Energie

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Sébastien CouvreurCatherine HurtaudPierre-Guy MarnetPhilippe FaverdinJean-Louis J.-L. Peyraud
• Organismes : Production du lait Ecole Supérieure des Agricultures Production du lait Production du lait Production du lait Production du lait
• Publié dans Journal of Dairy Science le 22/10/2020

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