Philippe JEAN-PIERRE

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2006
• Auteurs : Jean-Philippe PerninAnne Lejeune
• Organismes : Modèles et Technologies pour l’Apprentissage Humain Modèles et Technologies pour l’Apprentissage Humain

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Résumé : In this paper, we focus our attention on the authoring approach applied on learning scenario's management. We present the challenges raised by this issue by proposing a precise definition of the concept of learning scenario and its lifecycle. Then, we present current works aiming to capture and analyze the practitioners' needs and usages and to co-build models and tools matching with their specific context and environment. To conclude, we wonder about the possibility of considering a federative meta-model whereas at least three different targets must be considered: models for computation, models for design specialists and models for practitioners such as teachers.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2006
• Auteurs : Philippe LangevinPatrice RabizzoniPascal VéronJ.-P. Zanotti
• Organismes : Institut de Mathématiques de Toulon - EA 2134 Institut de Mathématiques de Toulon - EA 2134 Institut de Mathématiques de Toulon - EA 2134 Institut de Mathématiques de Toulon - EA 2134

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2006
• Auteurs : Jean Philippe RegnauxJohanna RoberstonDjamel Ben SmailOlivier DanielBernard Bussel
• Organismes : Physiologie et physiopathologie de la motricité chez l'homme Department of Neurology Physiologie et physiopathologie de la motricité chez l'homme Physiologie et physiopathologie de la motricité chez l'homme Physiologie et physiopathologie de la motricité chez l'homme Physiologie et physiopathologie de la motricité chez l'homme
• Publié dans Journal of NeuroEngineering and Rehabilitation le 24/10/2020

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Résumé : BACKGROUND: The aim of the study was to assess the attentional requirements of steady state treadmill walking in human subjects using a dual task paradigm. The extent of decrement of a secondary (cognitive) RT task provides a measure of the attentional resources required to maintain performance of the primary (locomotor) task. Varying the level of difficulty of the reaction time (RT) task is used to verify the priority of allocation of attentional resources. METHODS: 11 healthy adult subjects were required to walk while simultaneously performing a RT task. Participants were instructed to bite a pressure transducer placed in the mouth as quickly as possible in response to an unpredictable electrical stimulation applied on the back of the neck. Each subject was tested under five different experimental conditions: simple RT task alone and while walking, recognition RT task alone and while walking, walking alone. A foot switch system composed of a pressure sensitive sensor was placed under the heel and forefoot of each foot to determine the gait cycle duration. RESULTS: Gait cycle duration was unchanged (p > 0.05) by the addition of the RT task. Regardless of the level of difficulty of the RT task, the RTs were longer during treadmill walking than in sitting conditions (p < 0.01) indicating that an increased amount of resources are required for the maintainance of walking performance on a treadmill at a steady state. No interaction (p > 0.05) was found between the attentional demand of the walking task and the decrement of performance found in the RT task under varying levels of difficulty. This finding suggests that the healthy subjects prioritized the control of walking at the expense of cognitive performance. CONCLUSION: We conclude that treadmill walking in young adults is not a purely automatic task. The methodology and outcome measures used in this study provide an assessment of the attentional resources required by walking on the treadmill at a steady state.

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Fichiers liés : 1743-0003-3-19.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2006
• Auteurs : Philippe CarmonaFrancesco GuerraYueyun HuOlivier Mejane
• Organismes : Laboratoire de Mathématiques Jean Leray Laboratoire de Probabilités et Modèles Aléatoires Laboratoire de Statistique et Probabilités
• Publié dans Journal of Theoretical Probability le 26/10/2020

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Résumé : We study a model of directed polymers with an exponentially recurrent Markov chain and an indefinitely divisible random environment. We prove that the normalized partition function converges exponentially fast towards zero at all temperatures.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2006
• Auteurs : Michael ZolenskyThomas ZegaHajime YanoSue WirickAndrew WestphalMike WeisbergIris WeberJack WarrenMichael VelbelAkira TsuchiyamaPeter TsouAlice ToppaniNaotaka TomiokaKazushige TomeokaNick TeslichMitra TaheriJean SusiniRhonda StroudThomas StephanFrank StadermannChristopher SneadSteven SimonAlexandre SimionoviciThomas SeeFrançois RobertFrans RietmeijerWilliam RaoMurielle PerronnetDimitri PapanastassiouKyoko OkudairaKazumasa OhsumiIchiro OhnishiKeiko Nakamura-MessengerTomoki NakamuraSmail MostefaouiTakashi MikouchiAnders MeibomGraciela MatrajtMatthew A. MarcusHugues LerouxLaurence LemelleLoan LeAntonio LanzirottiFalko LangenhorstAlexander KrotLindsay KellerAnton KearsleyDavid JoswiakDamien JacobHope IshiiRalph HarveyKenji HagiyaLawrence GrossmanJeffrey GrossmanGiles GrahamMatthieu GounellePhilippe GilletMatthew GengeGeorge FlynnTristan FerroirStewart FallonDenton EbelZu Rong DaiPatrick CordierBenton ClarkMiaofang ChiAnna ButterworthDonald BrownleeJohn BridgesSean BrennanAdrian BrearleyJohn BradleyPierre BleuetPhil BlandRon Bastien
• Organismes : European Synchrotron Radiation Facility European Synchrotron Radiation Facility Laboratoire de Sciences de la Terre Institut d'Informatique et de Mathématiques Appliquées de Grenoble Laboratoire Environnement et Minéralurgie Laboratoire de Modélisation des Transferts dans l'Environnement Advanced Light Source [LBNL Berkeley] Laboratoire de Sciences de la Terre Laboratoire de Sciences de la Terre Laboratoire de Sciences de la Terre Laboratoire de structures et propriétés de l'état solide - UMR 8008
• Publié dans Science le 22/10/2020

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Résumé : The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional much larger (over 1 micrometer) ferromagnesian silicates, Fe-Ni sulfides, Fe-Ni metal, and accessory phases. The very wide range of olivine and low-Ca pyroxene compositions in comet Wild 2 requires a wide range of formation conditions, probably reflecting very different formation locations in the protoplanetary disk. The restricted compositional ranges of Fe-Ni sulfides, the wide range for silicates, and the absence of hydrous phases indicate that comet Wild 2 experienced little or no aqueous alteration. Less abundant Wild 2 materials include a refractory particle, whose presence appears to require radial transport in the early protoplanetary disk.

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2006
• Auteurs : Jean-Pierre PrenelFrançois LanzettaBruno SerioEric GavignetPhilippe NikaYannick BaillyLaurent Thiery
• Organismes : Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2006
• Auteurs : Nicole AnquetilGilles BoquératPierre GentellePhilippe PelletierGabriel Weissberg
• Organismes : Environnement, Ville, Société Laboratoire Interdisciplinaire Solidarités, Sociétés, Territoires

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2006
• Auteurs : Jean-Philippe LavalPierre BlaineauNicolas LeprovostBérengère DubrulleFrançois Daviaud
• Organismes : Laboratoire de Mécanique de Lille - FRE 3723 Service de physique de l'état condensé Service de physique de l'état condensé Service de physique de l'état condensé Service de physique de l'état condensé
• Publié dans Physical Review Letters le 02/11/2020

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Résumé : We use direct and stochastic numerical simulations of the magnetohydrodynamic equations to explore the influence of turbulence on the dynamo threshold. In the spirit of the Kraichnan-Kazantsev model, we model the turbulence by a noise, with given amplitude, injection scale and correlation time. The addition of a stochastic noise to the mean velocity significantly alters the dynamo threshold. When the noise is at small (resp. large) scale, the dynamo threshold is decreased (resp. increased). For a large scale noise, a finite correlation time reinforces this effect.

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Fichiers liés : prl-bruit-221205.pdf

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• Type de publi. : Rapport
• Date de publi. : 01/01/2006
• Auteurs : Charles BergPierre DesmarezJohn R. EdwardsChristophe NosbonneXavier EngelsJean-Philippe FonsLeszek GilejkoLionel JacquotJean-Louis MeyerRafal TowalskiWillems Helmut
• Organismes : Université de Lorraine IAE Nancy School of Management

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2006
• Auteurs : Joëlle TexereauDany JamalGérald ChoukrounPierre-Régis BurgelJean-Luc DiehlAntoine RabbatPhilippe LoiratAntoine ParrotAlexandre DuguetJoël CosteDaniel DusserDominique HubertJean-Paul Mira
• Organismes : Service de physiologie et explorations fonctionelles [CHU Cochin] Institut Cochin Service de réanimation médicale polyvalente [CHU Cochin] Institut Cochin Service de réanimation médicale polyvalente [CHU Cochin] Institut Cochin Service de pneumologie [CHU Cochin] Institut Cochin Service de réanimation médicale [CHU HEGP] Institut Cochin Service de Pneumologie – Réanimation Médicale Service de Réanimation Médicale Laboratoire d'Acoustique de l'Université du Mans CHU Tenon [AP-HP] Laboratoire d'Acoustique de l'Université du Mans CHU Pitié-Salpêtrière [AP-HP] Institut Cochin Service d'informatique médicale [CHU Cochin] Institut Cochin Service de pneumologie [CHU Cochin] Institut Cochin Service de pneumologie [CHU Cochin] Institut Cochin Service de réanimation médicale polyvalente [CHU Cochin]
• Publié dans Respiratory Research le 28/10/2020

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Résumé : BACKGROUND: Intensive care unit (ICU) admission of adults with cystic fibrosis (CF) is controversial because of poor outcome. This appraisal needs re-evaluation following recent changes in both CF management and ICU daily practice. Objectives were to determine long-term outcome of adults with CF admitted in ICU and to identify prognostic factors. METHODS: Retrospective multicenter study of 60 ICU hospitalizations for 42 adult CF patients admitted between 2000 and 2003. Reason for ICU admission, ventilatory support provided and one-year survival were recorded. Multiple logistic analysis was used to determine predictors of mortality. RESULTS: Prior to ICU admission, all patients (mean age 28.1 +/- 8 yr) had a severe lung disease (mean FEV1 28 +/- 12% predicted; mean PaCO2 47 +/- 9 mmHg). Main reason for ICU hospitalization was pulmonary infective exacerbation (40/60). At admission, noninvasive ventilation was used in 57% of cases and was successful in 67% of patients. Endotracheal intubation was implemented in 19 episodes. Overall ICU mortality rate was 14%. One year after ICU discharge, 10 of the 28 survivors have been lung transplanted. Among recognized markers of CF disease severity, only the annual FEV1 loss was associated with a poor outcome (HR = 1.47 [1.18-1.85], p = 0.001). SAPSII (HR = 1.08 [1.03-1.12], p < 0.001) and endotracheal intubation (HR = 16.60 [4.35-63.34], p < 0.001) were identified as strong independent predictors of mortality. CONCLUSION: Despite advanced lung disease, adult patients with CF admitted in ICU have high survival rate. Endotracheal intubation is associated with a poor prognosis and should be used as the last alternative. Although efforts have to be made in selecting patients with CF likely to benefit from ICU resources, ICU admission of these patients should be considered.

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Fichiers liés : 1465-9921-7-14.pdf

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