Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Philippe Berthet RambaudPascal PerrotinYehya TimsahMichel MommessinJean Pierre MouginJacky MazarsL. Daudeville
• Organismes : Centre d'études techniques de l'équipement de Lyon LabOratoire proCédés énergIe bâtimEnt Laboratoire Sols, Solides, Structures Risques, Vulnérabilité des structures et comportement mécanique des matériaux LabOratoire proCédés énergIe bâtimEnt Institut Dolomieu (géologie) Laboratoire Sols, Solides, Structures Risques, Vulnérabilité des structures et comportement mécanique des matériaux Laboratoire Sols, Solides, Structures Risques, Vulnérabilité des structures et comportement mécanique des matériaux
• Publié dans Italian Geotechnical Journal le 13/10/2010

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Fichiers liés : RIG.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Marc FournierLaurent JolivetPhilippe DavyJean-Charles Thomas
• Organismes : Laboratoire de tectonique Laboratoire de tectonique Centre Armoricain d'Etude Structurale des Socles Laboratoire de Géophysique Interne et Tectonophysique
• Publié dans Geophysical Journal International le 25/10/2020

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Résumé : The deformation of the eastern Asian lithosphere during the first part of the India-Asia collision was dominated by subduction-related extension interacting with far effects of the collision. In order to investigate the role of large-scale extension in collision tectonics, we performed analogue experiments of indentation with a model of lithosphere subjected to extension. We used a three-layer rheological model of continental lithosphere resting upon an asthenosphere of low viscosity and strained along its southern boundary by a rigid indenter progressing northward. The lithosphere model was scaled to be gravitationally unstable and to spread under its ownweight, so that extension occurred in thewhole model. The eastern boundarywas free or weakly confined and always allowed eastward spreading of the model. We studied the pattern of deformation for different boundary conditions. The experimental pattern of deformation includes a thickened zone in front of the indenter, a major northeast-trending left-lateral shear zone starting from the northwest corner of the indenter, antithetic north-south right-lateral shear zones more or less developed to the east of the indenter, and a purely extensional domain in the southeastern part of the model. In this domain, graben opening is driven by gravitational spreading, whereas it is driven by gravitational spreading and indentation in the northeastern part where grabens opened along strike-slip faults. The results are compared with the Oligo- Miocene deformation pattern of Asia consecutive to the collision of India. Our experiments bring a physical basis to models which favour distributed deformation within a slowly extruded wide region extending from the Baikal Rift to the Okhotsk Sea and to southeast Asia and Indonesia. In this large domain, the opening of backarc basins (Japan Sea, Okinawa Trough, South China Sea) and continental grabens (North China grabens) have been associated with approximately north-south-trending right-lateral strike-slip faults, which accommodated the northward penetration of India into Eurasia.

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Fichiers liés : Fournier_et_HAL_GJI_2004.pdf

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2004
• Auteurs : Marius George LinguraruNicholas AyacheEric BardinetMiguel Ángel González BallesterDamien GalanaudStéphane HaïkBaptiste FaucheuxJ.J. HauwJacques ChirasPatrick J CozzoneDidier DormontJean-Philippe Brandel
• Organismes : Medical imaging and robotics Medical imaging and robotics Medical imaging and robotics Neurosciences cognitives et imagerie cérébrale Neurologie et thérapeutique expérimentale Centre de Recherche de l'Institut du Cerveau et de la Moelle épinière Medical imaging and robotics Centre de résonance magnétique biologique et médicale CHU Pitié-Salpêtrière [AP-HP] Laboratoire de Neuropathologie Raymond Escourolle [CHU Pitié-Salpétriêre] CHU Pitié-Salpêtrière [AP-HP] Centre de résonance magnétique biologique et médicale Neurosciences cognitives et imagerie cérébrale Centre de Recherche de l'Institut du Cerveau et de la Moelle épinière CHU Pitié-Salpêtrière [AP-HP] Laboratoire d'Imagerie Fonctionnelle Neuroépidémiologie

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Résumé : no abstract

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Philippe EstèbeJean-Pierre AugustinEvelyne BaillergeauJulie-Anne BoudreauHélène Buisson-FenetLaurent DaveziesGérard DivayJean-Marc FontanAnnick GermainThomas GulianThomas KirszbaumJuan-Luis KleinMichel-Alexis MontaneRichard MorinMarc-Urbain ProulxFrançois-Xavier SchweyerAnne-Marie SéguinGilles Senecal
• Organismes : Centre Interdisciplinaire de Recherches Urbaines et Sociologiques Aménagement, Développement, Environnement, Santé et Sociétés Institut National de la Recherche Scientifique [Québec] Laboratoire d'Economie et de Sociologie du Travail Laboratoire Ville, Mobilité, Transport Université du Québec à Montréal = University of Québec in Montréal Institut National de la Recherche Scientifique [Québec] Institut des Sciences sociales du Politique Université du Québec à Montréal = University of Québec in Montréal Université du Québec à Chicoutimi ENSP Rennes (devenue EHESP) Laboratoire d'analyse des politiques sociales et sanitaires
• Publié dans Lien social et Politiques le 25/10/2020

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Résumé : L’approche territoriale est devenue en France le cadre de mise en oeuvre des politiques de santé, et l’échelon régional est considéré comme le plus pertinent pour le pilotage des dispositifs. L’enjeu majeur pour l’avenir, qui se dégage après plus de dix ans d’expérience, est d’associer tous les acteurs de santé, et particulièrement la médecine libérale, au sein d’une politique de santé adaptée à un territoire. Or les médecins ont une approche curative individuelle qui ne donne pas sens à la notion de territoire, comme le prouve l’analyse des stratégies d’installation des généralistes. Dès lors, un déplacement du référentiel d’action professionnel devient la condition nécessaire à l’implication des médecins libéraux dans les politiques territoriales de santé. L’étude du fonctionnement des réseaux de santé met en lumière l’apprentissage collectif qui s’y développe et les difficultés à dépasser un modèle professionnel en l’absence d’un référentiel alternatif. Les territoires peuvent-ils être les outils d’une acculturation à une approche de santé publique ?

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Philippe BuissonVéronique BachElmountacer-Billah ElabbassiKaren ChardonStéphane DelanaudJean-Pierre CanarelliJean-Pierre Libert
• Organismes : Unité de Chirurgie Pédiatrique Périnatalité et Risques Toxiques - UMR INERIS_I 1 UPJV Périnatalité et Risques Toxiques - UMR INERIS_I 1 UPJV Périnatalité et Risques Toxiques - UMR INERIS_I 1 UPJV Périnatalité et Risques Toxiques - UMR INERIS_I 1 UPJV Unité de Chirurgie Pédiatrique Périnatalité et Risques Toxiques - UMR INERIS_I 1 UPJV
• Publié dans European Journal of Applied Physiology le 27/10/2020

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Résumé : This study assessed the relative efficiency of different warming devices (surgical sheets covering the body and a tubegauze on the head, forced-air warming, warming mattress) commonly used to prevent body hypothermia during neonatal surgery. Dry heat losses were measured from a thermal manikin, which simulated a low-birth-weight neonate of 1,800 g. The manikin's surface temperatures (35.8degreesC) corresponded to those of neonates nursed in closed incubators. Experiments were performed in a climatic chamber at an ambient temperature of 30degreesC, as commonly found in operating theatres. The supine manikin was naked or covered with operative sheets with a 5x5 cm aperture over the abdomen. Its head could be covered by a tubegauze. Additional warming was provided by conduction through a warming mattress (surface temperature, 39degreesC) and/or by convection (Bair Hugger, forced-air temperature 38degreesC). Covering the manikin with surgical sheets decreased the dry heat loss by 10.4 W. Additional forced-air warming was more efficient than the warming mattress to reduce the total dry heat loss (6.8 W vs 2.1 W). Heat losses were reduced by 7.9 W when combining the warming mattress and Bair Hugger. The heat loss from the head of the covered manikin was reduced from 4.5 W to 3.9 W when the head was covered with the tubegauze. Our data indicate that forced-air warming is more effective than conductive warming in preventing neonatal hypothermia during abdominal operations.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Jean-Philippe DelahayeGogniat GuyChristian RolandPierre Bomel
• Organismes : Institut d'Électronique et des Technologies du numéRique Laboratoire d'Electronique des Systèmes TEmps Réel Laboratoire d'Electronique des Systèmes TEmps Réel Lab-STICC_UBS_CACS_MOCS
• Publié dans Frequenz le 27/11/2008

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Résumé : This paper discusses the implementation of modulation chains for multi-standard communications on a dynamically and partially reconfigurable heterogeneous platform. Implementation results highlight the benefit of considering a DSP/FPGA platform instead of a multi-DSP platform since the FPGA supports efficiently intensive computation components, which reduces the DSP load. Furthermore, partial dynamic reconfiguration increases the overall performance as compared to total dynamic reconfiguration since there is 45% of bitstream size reduction, which leads to a 45% decrease of the whole reconfiguration time. The implementation of modulation chains for multi-standard communications proves the availability of new technology to support efficiently Software Defined Radio.

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Fichiers liés : delahaye_2004frequenz.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Augustin BaasJean-Philippe KarrMarco RomanelliAlberto BramatiElisabeth Giacobino
• Organismes : Laboratoire Kastler Brossel Laboratoire Kastler Brossel Laboratoire Kastler Brossel Laboratoire Kastler Brossel Laboratoire Kastler Brossel
• Publié dans Physical Review B: Condensed Matter and Materials Physics (1998-2015) le 02/11/2020

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Résumé : We report the observation of optical bistability in a microcavity pumped at the \"magic angle\". Experimental evidence is given in the form of a hysteresis cycle of the nonlinear emission as a function of the pump intensity or the position of the excitation spot. The results can be well understood with simple theoretical considerations that underline the fundamental analogy between our system and an optical parametric oscillator.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2004
• Auteurs : Evelyne KolbJean CviklinskiJosé LanuzaPhilippe ClaudinÉric Clément
• Organismes : Laboratoire des Milieux Désordonnés et Hétérogènes Laboratoire des Milieux Désordonnés et Hétérogènes Laboratoire des Milieux Désordonnés et Hétérogènes Laboratoire des Milieux Désordonnés et Hétérogènes Laboratoire des Milieux Désordonnés et Hétérogènes
• Publié dans Physical Review E : Statistical, Nonlinear, and Soft Matter Physics [2001-2015] le 01/11/2020

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Résumé : We investigate the mechanical properties of a static dense granular assembly in response to a local forcing. To this end, a small cyclic displacement is applied on a grain in the bulk of a two-dimensional disordered packing under gravity and the displacement fields are monitored. We evidence a dominant long range radial response in the upper half part above the solicitation and after a large number of cycles the response is "quasireversible" with a remanent dissipation field exhibiting long range streams and vortexlike symmetry.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2004
• Auteurs : Eric AnterrieuBruno PicardManuel Martin-NeiraPhilippe WaldteufelMartin SuessJean-Luc VergelyYann H. KerrSylvie Roques
• Organismes : Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique Service d'aéronomie Centre d'études spatiales de la biosphère Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées

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Résumé : SMOS is a mission of the European Space Agency (ESA) devoted to the monitoring of Soil Moisture and Ocean Salinity maps at global scale from L-band space borne radiometric observations. It will be the first attempt to apply to remote sensing of the Earth surface, the concept of Synthetic Aperture Imaging Radiometers (SAIR), initially developed for radio astronomy. The single payload of the mission is a Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) operating at 1.415 GHz. Interferometer measurements, also called complex visibilities, are obtained by cross-correlating the signals collected by every pairs of antennae of a Y-shaped interferometric array. They are related to the radiometric brightness temperature of the observed scene by a spatial FOURIER-like integral. A regularized reconstruction process provides a band-limited solution to the corresponding inverse problem where the GIBBS oscillations caused by the truncation of the complex visibilities to the star-shaped frequency coverage are damped with an appropriate windowing function. The reconstructed brightness temperature map is obtained in the reference frame of the antenna. Up to now a single isotropic windowing function has been used in simulating this process; consequently this map exhibits a constant and isotropic angular resolution over the instrument field of view. However, owing to the geometry of the problem, these properties are no longer true for its projection onto the Earth's surface. Since the retrieval of physical quantities implies to combine several measurements for various incidence angles, the variations in shape and size of the weighting function at surface level (the "SMOS pixel") may result in significant errors when the SMOS pixel features strong heterogeneities. It has been suggested that this problem could be solved by the so called "strip adaptive" processing, i.e. using a specific windowing function for every location in the SMOS antenna frame of reference, in order to achieve a close to uniform pixel at surface level. In this paper, taking advantage of the band-limited solution to the reconstruction problem, various windowing functions are used in order to provide maps which exhibit to various extents a constant and isotropic spatial resolution at ground level. This contribution describes the properties of these windowing functions and how the corresponding multi-windows apodization (i.e. strip adaptive processing) is performed. To support the theory and to illustrate the performances of this imaging method, numerical simulations are presented within the frame of the SMOS project. Various options are illustrated in terms of their consequences for soil moisture measurements retrieved from future SMOS data.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2004
• Auteurs : Philippe SchoeneichDidier HantzJean-Marc VengeonM. FrayssinesPhilip DelineFrançois AmelotJ. SavaryJ.-D. RouillerM. Paganone
• Organismes : Pacte, Laboratoire de sciences sociales Laboratoire Interdisciplinaire de Recherche Impliquant la Géologie et la Mécanique Laboratoire Interdisciplinaire de Recherche Impliquant la Géologie et la Mécanique Environnements, Dynamiques et Territoires de Montagne Environnements, Dynamiques et Territoires de Montagne CREALP - Research Centre on Alpine Environment

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