Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Olivier AlévêquePhilippe LericheNicolas CocherelPierre FrèreAntonio CravinoJean Roncali
• Organismes : MOLTECH-Anjou MOLTECH-Anjou MOLTECH-Anjou MOLTECH-Anjou MOLTECH-Anjou
• Publié dans Solar Energy Materials and Solar Cells le 31/10/2020

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Résumé :

Hybrid conjugated systems consisting of a triphenylamine core substituted by three dithiafulvenyl moieties have been synthesized and tested as active materials in organic field-effect transistors and photovoltaic devices. UV–vis. spectroscopy studies demonstrate that, despite their amorphous character shown by X-ray diffraction and differential scanning calorimetry, strong interactions exist in these materials as an aggregative band is observed at low energies. A first evaluation of their potentialities as p semiconductor in organic field-effect transistors shows significant hole mobilities. For bilayer photovoltaic devices, a power conversion efficiency of 0.11% is observed and the external quantum efficiency of the cell under monochromatic irradiation shows a non-negligible contribution of the aggregative band.

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Fichiers liés : 2008_-_solmat_-_star-shaped_conjugated_systems_derived_from_dithiafulvenyl-derivatized_triphenylamines_as_active_materials_for_organic_solar_cells.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Fabrice CourtinVincent JamonneauGérard DuvalletAndré GarciaBamoro CoulibalyJean-Pierre DoumengueGilles CunyPhilippe Solano
• Organismes : Centre international de recherche-développement sur l'élevage en zone subhumide Université Paul-Valéry - Montpellier 3 Centre international de recherche-développement sur l'élevage en zone subhumide Centre d’Ecologie Fonctionnelle et Evolutive Institut Pierre Richet [Bouaké, Côte d'Ivoire] Université Paul-Valéry - Montpellier 3 UMR Trypanosomes Centre international de recherche-développement sur l'élevage en zone subhumide
• Publié dans Tropical Medicine and International Health le 25/10/2020

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Résumé : Objective To review the geography and history of sleeping sickness (Human African trypanosomiasis; HAT) over the past 100 years in West Africa, to identify priority areas for sleeping sickness surveillance and areas where HAT no longer seems active.Method History and geography of HAT were summarized based on a review of old reports and recent publications and on recent results obtained from medical surveys conducted in West Africa up to 2006.Results/conclusions Active HAT foci seem to have moved from the North to the South. Endemic HAT presently appears to be limited to areas where annual rainfall exceeds 1200 mm, although the reasons for this remain unknown. There has also been a shift towards the south of the isohyets and of the northern distribution limit of tsetse. Currently, the most severely affected countries are Guinea and Ivory Coast, whereas the northern countries seem less affected. However, many parts of West Africa still lack information on HAT and remain to be investigated. Of particular interest are the consequences of the recent political crisis in Ivory Coast and the resulting massive population movements, given the possible consequences on HAT in neighbouring countries.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : R. FenderRalph A. M. J. WijersBenjamin W. StappersR. BraunMichael W. WiseThijs CoenenHeino FalckeJean-Mathias GriessmeierM. P. van HaarlemG. de BruynP. JonkerCasey J. LawSera MarkoffJ. MastersJames C. Miller-JonesR. A. OstenBart ScheersHanno SpreeuwJohn D. SwinbankC. VogtRudy WijnandsPhilippe Zarka
• Organismes : Laboratoire d'études spatiales et d'instrumentation en astrophysique Physique des plasmas Laboratoire d'études spatiales et d'instrumentation en astrophysique Physique des plasmas
• Publié dans PoS - Proceedings of Science le 27/10/2020

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2008
• Auteurs : Jean-Pierre Le CromJacques Le GoffAnicet Le PorsPatrick LeroyDaniel MotheBéatrice Thomas-TualPhilippe Waquet
• Organismes : Centre de Recherche Administrative de Brest Centre de Recherche en Droit Privé de Brest

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2008
• Auteurs : Philippe Martin
• Organismes : LAboratoire de Recherche Historique Rhône-Alpes - UMR5190

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2008
• Auteurs : François CaylaJean Jacques GonzalezPierre FretonPhilippe Teulet
• Organismes : LAboratoire PLasma et Conversion d'Energie Arc Electrique et Procédés Plasmas Thermiques Arc Electrique et Procédés Plasmas Thermiques Arc Electrique et Procédés Plasmas Thermiques

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Jean-Charles DupontMartial HaeffelinPhilippe DrobinskiT. Besnard
• Organismes : Laboratoire de Météorologie Dynamique (UMR 8539) ATMOS Sarl Laboratoire de Météorologie Dynamique (UMR 8539) Service d'aéronomie ATMOS Sarl
• Publié dans Journal of Geophysical Research: Atmospheres le 24/10/2020

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Résumé : The surface downwelling longwave irradiance in clear-sky situations is an important component of the global radiation balance. It can be measured directly using ground-based pyrgeometers or computed using a radiative transfer code given precise information on atmospheric composition (water vapor, ozone, and aerosols) and temperature. Discrepancies between instantaneous observed and simulated values of the clear-sky longwave irradiance are typically at the 3–10 W m−2 level (root-mean-square error). The discrepancies depend both on pyrgeometer and atmospheric composition uncertainties. Over the past century, many authors have worked on deriving control parameters to simulate the clear-sky longwave irradiance using simple parameterizations. The most common control parameters found in the literature are screen-level temperature, screen-level water vapor density, and column integrated precipitable water. We show that reference parameterizations are able to simulate the clear-sky longwave irradiance with an uncertainty of about 10 W m−2. Uncertainties are greater during nighttime than daytime periods. We propose a new parameterization that uses the standard input parameters and their diurnal variations to account for important effects of their vertical distribution on the simulation of clear-sky longwave irradiance. The new parameterization allows us to reduce uncertainties in clear-sky surface downwelling longwave irradiance simulations to better than 5 W m−2 for both daytime and nighttime situations.

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Fichiers liés : Dupont_et_al-2008-Journal_of_Geophysical_Research__Solid_Earth_(1978-2012).pdf

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2008
• Auteurs : Philippe LerichePierre FrèreEmilie RipaudAntonio CravinoOlivier AlévêqueJean Roncali
• Organismes : MOLTECH-Anjou MOLTECH-Anjou MOLTECH-Anjou MOLTECH-Anjou MOLTECH-Anjou

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : David PechPhilippe SteyerJean-Pierre Millet
• Organismes : Matériaux, ingénierie et science [Villeurbanne] Matériaux, ingénierie et science [Villeurbanne] Matériaux, ingénierie et science [Villeurbanne]
• Publié dans Corrosion Science le 30/10/2020

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Résumé : Amorphous silica coatings have been deposited by plasma assisted chemical vapor deposition (PACVD) process on M2 steel and 304 stainless steel substrates. The chemical inertia of the coating has been established by resonant quartz crystal microbalance (RQCM), and no porosity has been observed at the AFM scale. The barrier effect has been evaluated on M2 steel by applying the concept of dipolar relaxation. The protection is very efficient, and no deleterious galvanic coupling with the uncoated metallic surface can occur. A coated stainless steel was also investigated in NaCl solution in order to understand how the passive properties are influenced by such a barrier coating. When deposited on stainless steel, coated part keeps the beneficial passive behaviour inherent to the substrate. They evidence almost no corrosion. The silica based layer behaves as a quasi perfect dielectric. The corrosion rate is then greatly reduced, and the pitting resistance is improved. The excellent localized corrosion protection has been explained by a tiny porosity rate, and a limited access of chloride ions through open pores.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2008
• Auteurs : Sébastien LyonnaisLaurence Goux-CapesChristophe EscudeDenis CôteArianna FiloramoJean-Philippe Bourgoin
• Organismes : Laboratoire d'Electronique Moléculaire Laboratoire d'Electronique Moléculaire Acides nucléiques : dynamique, ciblage, et fonctions biologiques - Régulation et dynamique des génomes Laboratoire Pierre Aigrain Laboratoire d'Electronique Moléculaire Laboratoire d'Electronique Moléculaire
• Publié dans Small le 30/10/2020

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