Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Géraldine GuerriLyu AbeEric AristidiJean-Baptiste DabanJean-Pierre RivetPhilippe BendjoyaFarrokh VakiliAbdelkrim Agabi
• Organismes : Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau
• Publié dans EAS Publications Series le 01/11/2020

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Résumé : We present the results of the first light of CORONA obtained during the summer campaign 2005 at Dome C. The CORONA experiment uses an automated 14'' antarctized telescope for its remote operation from the Concordia station. The instrument includes an Achromatized Phase Knife Coronagraph (APKC) with no tip-tilt correction. The high contrast long exposure is obtained from image selection among raw short exposures.

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Fichiers liés : Guerri2007.pdf

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• Type de publi. : Rapport
• Date de publi. : 01/01/2007
• Auteurs : Rabie Ben AtitallahPierre BouletArnaud CuccuruJean-Luc DekeyserAntoine HonoréOuassila LabbaniSébastien Le BeuxPhilippe MarquetÉric PielJulien TaillardHuafeng Yu
• Organismes : Contributions of the Data parallelism to real time Contributions of the Data parallelism to real time Laboratoire d'Informatique Fondamentale de Lille Contributions of the Data parallelism to real time Contributions of the Data parallelism to real time Laboratoire d'Informatique Fondamentale de Lille Contributions of the Data parallelism to real time Contributions of the Data parallelism to real time Laboratoire d'Informatique Fondamentale de Lille Contributions of the Data parallelism to real time Contributions of the Data parallelism to real time Laboratoire d'Informatique Fondamentale de Lille Contributions of the Data parallelism to real time Laboratoire d'Informatique Fondamentale de Lille Contributions of the Data parallelism to real time Contributions of the Data parallelism to real time

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Résumé : This document describes the current UML profile of Gaspard2. This profile extends the UML semantics to allow the user to describe a SoC (System-on-Chip) in three steps: the application (behavior of the Soc), the hardware architecture, and the association of the application to the hardware architecture. The application is represented following a data flow model, but additional mechanisms permit the usage of control flow on those applications. In addition to those notions, the profile contains a package introducing factorization mechanisms to enable the compact description of massively parallel and repetitive systems.

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Fichiers liés : gaspard-profile.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : T. RobinetÉric FeunteunElodie RéveillacPhilippe KeithG. MarquetJean Michel OlivierP. Valade
• Organismes : Biologie des organismes marins et écosystèmes Biologie des organismes marins et écosystèmes Laboratoire d'Ecologie des Hydrosystèmes Fluviaux
• Publié dans Environmental Biology of Fishes le 01/01/2003

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Jean-Pierre ChaomleffelGérard DalmazPhilippe Vergne
• Organismes : Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]
• Publié dans Tribology International le 25/10/2020

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2007
• Auteurs : Laurent TroussellierCédric ChludaMikhaël MyaraJérôme BochLaurent DusseauPhilippe SignoretOlivier GilardMichel SotomJean-Pierre David
• Organismes : Institut d’Electronique et des Systèmes Térahertz, hyperfréquence et optique Institut d’Electronique et des Systèmes Térahertz, hyperfréquence et optique Institut d’Electronique et des Systèmes Térahertz, hyperfréquence et optique Institut d’Electronique et des Systèmes Radiations et composants Institut d’Electronique et des Systèmes Radiations et composants Institut d’Electronique et des Systèmes Térahertz, hyperfréquence et optique Centre National d'Études Spatiales [Toulouse] IRT Saint Exupéry - Institut de Recherche Technologique Communication Langagière et Interaction Personne-Système

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Wigneron J.-P.Yann H. KerrPhilippe WaldteufelKauzar Saleh ContellMaria Jose EscorihuelaPhilippe RichaumePaolo FerrazzoliPatricia de RosnayRobert GurneyJean-Christophe CalvetJennifer P. GrantMassimo GuglielmettiBrian K. HornbuckleChristian MatzlerThierry PellarinMike Schwank
• Organismes : Écologie fonctionnelle et physique de l'environnement Centre d'études spatiales de la biosphère Service d'aéronomie Écologie fonctionnelle et physique de l'environnement Centre d'études spatiales de la biosphère Centre d'études spatiales de la biosphère Università degli Studi di Roma Tor Vergata [Roma, Italia] = University of Rome Tor Vergata [Rome, Italy] = Université de Rome Tor Vergata [Rome, Italie] Centre d'études spatiales de la biosphère Natural Environment Research Council Centre national de recherches météorologiques Faculty of Earth and Life Sciences [Amsterdam] Department of Computer Science [ETH Zürich] Iowa State University Institute of Applied Physics [Bern] Laboratoire d'étude des transferts en hydrologie et environnement Department of Computer Science [ETH Zürich]
• Publié dans Remote Sensing of Environment le 28/10/2020

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Résumé : In the near future, the SMOS (Soil Moisture and Ocean Salinity) mission will provide global maps of surface soil moisture (SM). The SMOS baseline payload is an L-band (1.4 GHz) two dimensional interferometric microwave radiometer which will provide multi-angular and dual-polarization observations. In the framework of the ground segment activities for the SMOS mission an operational SMOS Level 2 Soil Moisture algorithm was developed. The principle of the algorithm is to exploit multi-angular data in order to retrieve simultaneously several surface parameters including soil moisture and vegetation characteristics. The algorithm uses an iterative approach, minimizing a cost function computed from the differences between measured and modelled brightness temperature (TB) data, for all available incidence angles. In the algorithm, the selected forward model is the so-called L-MEB (L-band Microwave Emission of the Biosphere) model which was the result of an extensive review of the current knowledge of the microwave emission of various land covers. This model is a key element in the SMOS L2 algorithm and could be used in future assimilation studies. There is thus a strong need for a reference study, describing the model and its implementation. In order to address these needs a detailed description of soil and vegetation modelling in L-MEB is given in this study. In a second step, the use of L-MEB in soil moisture retrievals is evaluated for several experimental data sets over agricultural crops. Calibrations of the soil and vegetation L-MEB parameters are investigated for corn, soybean and wheat. Over the different experiments, very consistent results are obtained for each vegetation type in terms of calibration and soil moisture retrievals.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Jean-Philippe DuvelJérôme Vialard
• Organismes : Laboratoire de Météorologie Dynamique (UMR 8539) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
• Publié dans Journal of Climate le 02/11/2020

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Résumé : Since the ISV of the convection is an intermittent phenomenon, the local mode analysis (LMA) technique is used to detect only the ensemble of intraseasonal events that are well organized at large scale. The LMA technique is further developed in this paper in order to perform multivariate analysis given patterns of SST and surface wind perturbations associated specifically with these intraseasonal events. During boreal winter, the basin-scale eastward propagation of the convective perturbation is present only over the Indian Ocean Basin. The intraseasonal SST response to convective perturbations is large and recurrent over thin mixed layer regions located north of Australia and in the Indian Ocean between 5° and 10°S. By contrast, there is little SST response in the western Pacific basin and no clear eastward propagation of the convective perturbation. During boreal summer, the SST response is large over regions with thin mixed layers located north of the Bay of Bengal, in the Arabian Sea, and in the China Sea. The northeastward propagation of the convective perturbation over the Bay of Bengal is associated with a standing oscillation of the SST and the surface wind between the equator and the northern part of the bay. In fact, many intraseasonal events mostly concern a single basin, suggesting that the interbasin organization is not a necessary condition for the existence of coupled intraseasonal perturbations of the convection. The perturbation of the surface wind tends to be larger to the west of the large-scale convective perturbation (like for a Gill-type dynamical response). For eastward propagating perturbations, the cooling due to the reinforcement of the wind (i.e., surface turbulent heat flux) thus generally lags the radiative cooling due to the reduction of the surface solar flux by the convective cloudiness. This large-scale Gill-type response of the surface wind also cools the surface to the west of the basin (northwest Arabian Sea and northwest Pacific Ocean), even if the convection is locally weak. An intriguing result is a frequently occurring small delay between the maximum surface wind and the minimum SST. Different explanations are invoked, like a rapid surface cooling due to the vanishing of an ocean warm layer (diurnal surface warming due to solar radiation in low wind conditions) as soon as the wind increases.

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Fichiers liés : [15200442 - Journal of Climate] Indo-Pacific Sea Surface Temperature Perturbations Associated with Intraseasonal Oscillations of Tropical Convection.pdf

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2007
• Auteurs : Jérôme GrévyBruno BéthouartAlbert RouetPhilippe BlaudeauMichel RoucheMichel FauquierThomas DeswarteFrédéric-Pierre ChanutFabrice VigierGérard PelletierJean ChaunuJean-Louis ClémentArnould de La BrosseFrançois ArsLudovic LalouxFrédéric Le MoigneJasques BouquetBruno MartinFrançois GondrandEtienne ThéveninKlaus Grosse KrachtXavier Boniface
• Organismes : Centre de recherches interdisciplinaires en histoire, histoire de l'art et musicologie [EA 4270] Unité de recherche sur l'histoire, les langues, les littératures et l'interculturel Cultures, Arts, Littératures, Histoire, Imaginaires, Sociétés, Territoires, Environnement - EA 4343

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2007
• Auteurs : Benoît ClavelCorinne Feïss-JehelJean Olivier GuilhotPierre-Jérôme JehelSandrine MounyJean-Michel MoutonClaudine PiatonPhilippe Racinet
• Organismes : Muséum national d'Histoire naturelle École Pratique des Hautes Études PROCLAC - Proche-Orient—Caucase : langues, archéologie, cultures Ministère de la Culture GOBELINS Paris Textes, Représentations, Archéologie, Autorité et Mémoire de l'Antiquité à la Renaissance - UR UPJV 4284 PROCLAC - Proche-Orient—Caucase : langues, archéologie, cultures L'information visuelle et textuelle en histoire de l'art : nouveaux terrains, corpus, outils Textes, Représentations, Archéologie, Autorité et Mémoire de l'Antiquité à la Renaissance - UR UPJV 4284

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Adeline PezierAdrien AcquistapaceMichel M. RenouJean-Pierre J.-P. RosparsPhilippe Lucas
• Organismes : Physiologie de l'Insecte : Signalisation et Communication Physiologie de l'Insecte : Signalisation et Communication Physiologie de l'Insecte : Signalisation et Communication Physiologie de l'Insecte : Signalisation et Communication Physiologie de l'Insecte : Signalisation et Communication
• Publié dans Chemical Senses le 29/10/2020

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Résumé : The role of Ca2+ in insect olfactory transduction was studied in the moth Spodoptera littoralis. Single sensillum recordings were made to investigate in vivo the role of sensillar Ca2+ on the electrophysiological properties of sex pheromone responsive olfactory receptor neurons (ORNs). Lowering the sensillar Ca2+ concentration to 2 x 10(-8) M increased ORN spontaneous firing activity and induced long bursts of action potentials (APs) superimposed on spontaneous negative deflections of the transepithelial potential. We inferred that Ca2+ stabilizes the membrane potential of ORNs, keeping the spontaneous firing activity at a low and regular level. Neither the amplitude and kinetics of the rising phase of sensillar potentials (SPs) recorded in response to pheromone stimuli nor the AP generation during stimulation depended on the extracellular Ca2+ concentration. Thus, extracellular Ca2+ is not absolutely necessary for ORN response. Partial inhibition of responses with a calmodulin antagonist, W-7, also indicates that intracellular Ca2+ contributes to the ORN response and suggests that Ca2+ release from internal stores is involved. In 2 x 10(-8) M Ca2+, the repolarization of the SP was delayed when compared with higher Ca2+ concentrations. Therefore, in contrast to depolarization, ORN repolarization depends on extracellular Ca2+. Ca2+-gated K+ channels identified from cultured ORNs with whole-cell recordings are good candidates to mediate ORN repolarization.

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