Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Philippe RenaultJean-Louis SoletDaouda SissokoElsa BalleydierSophie LarrieuLaurent FilleulChristian LassalleJulien ThiriaEmmanuelle RachouHenriette de ValkDaniele IlefMartine LedransIsabelle QuatresousPhilippe QuénelVincent Pierre
• Organismes : Cellule InterRégionale d'Epidémiologie Réunion Mayotte Indian Ocean Regional Office [Saint-Denis, La Réunion] Cellule InterRégionale d'Epidémiologie Réunion Mayotte Laboratoire de Biotechnologie et Microbiologie Appliquée Institut de Veille Sanitaire Epidémiologie, santé publique et développement Cire Aquitaine Association Nationale de Prévention en Alcoologie et Addictologie [Saint-Denis, La Réunion] Direction Régionale des Affaires Sanitaires et Sociales de La Réunion Observatoire régional de la santé La Réunion Institut de Veille Sanitaire Cellule Interrégionale d'Epidémiologie Institut de Veille Sanitaire "Personal Protection Against Vectors" working group Cellule interrégionale d'épidémiologie Antilles-Guyane Institut de Veille Sanitaire Cellule InterRégionale d'Epidémiologie Réunion Mayotte
• Publié dans American Journal of Tropical Medicine and Hygiene le 25/10/2020

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Résumé : In January 2005, an epidemic of chikungunya fever broke out in the Comoro Islands and lasted until May 2005. In April, cases were also reported in Mayotte and Mauritius. On Réunion Island, the first cases were reported at the end of April. Surveillance of this epidemic required an adaptive system, which at first was based on active and retrospective case detection around the cases reported, then relied on a sentinel network when the incidence increased. Emerging and severe forms of infection were investigated. Death certificates were monitored. By April 2006, the surveillance estimate was 244,000 cases of chikungunya virus infection, including 123 severe cases and 41 of maternoneonatal transmission, with an overall attack rate of 35%. Chikungunya infection was mentioned on 203 death certificates and significant mortality was observed. This epidemic highlighted the need for a mutual strategy of providing information on arboviral diseases and their prevention and control between countries in the southwestern Indian Ocean.

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2007
• Auteurs : Philippe BourdeauJean CorneloupPascal MaoEric Boutroy
• Organismes : Pacte, Laboratoire de sciences sociales Pacte, Laboratoire de sciences sociales Pacte, Laboratoire de sciences sociales

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Guillaume CharpiatPierre MaurelJean-Philippe PonsRenaud KerivenOlivier C Faugeras
• Organismes : Spatio-Temporal Activity Recognition Systems Computer and biological vision Vision, Action et Gestion d'informations en Santé Computer and biological vision imagine [Marne-la-Vallée] Centre Scientifique et Technique du Bâtiment Computer and biological vision Centre d'Enseignement et de Recherche en Technologies de l'Information et Systèmes Computer and biological vision Mathematical and Computational Neuroscience Computer and biological vision
• Publié dans International Journal of Computer Vision le 01/11/2020

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Résumé : This paper tackles an important aspect of the variational problem underlying active contours: optimization by gradient flows. Classically, the definition of a gradient depends directly on the choice of an inner product structure. This consideration is largely absent from the active contours literature. Most authors, explicitely or implicitely, assume that the space of admissible deformations is ruled by the canonical L 2 inner prod-uct. The classical gradient flows reported in the literature are relative to this particular choice. Here, we investigate the relevance of using (i) other inner products, yielding other gradient descents, and (ii) other minimizing flows not deriving from any inner product. In particular, we show how to induce different de-grees of spatial consistency into the minimizing flow, in order to decrease the probability of getting trapped into irrelevant local minima. We report numerical experiments indicating that the sensitivity of the active contours method to initial conditions, which seriously limits its applicability and efficiency, is alleviated by our application-specific spatially coherent minimizing flows. We show that the choice of the inner product can be seen as a prior on the deformation fields and we present an extension of the definition of the gradient toward more general priors.

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Fichiers liés : gradients.pdf

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2007
• 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. : Rapport
• Date de publi. : 01/01/2007
• Auteurs : Dominique PatureauGuillermina Hernandez-RaquetJean-Philippe DelgenèsMathieu MullerFrançois LaurentSophie LorberLaurent DebrauwerChristian MouginAlbert KollmannJacqueline DubrocaAgathe BraultJeanne GarricB. VollatR. MonsGilles MonodHélène RimeBenoît AupérinBrigitte MourotFrédéric BorelPatrick BalaguerMarie-Josèphe DuchesneAnne-Marie BoussiouxMatthieu BertrandJean-Pierre LumaretH. Glida
• Organismes : Laboratoire de Biotechnologie de l'Environnement [Narbonne] Laboratoire de Biotechnologie de l'Environnement [Narbonne] Laboratoire de Biotechnologie de l'Environnement [Narbonne] Laboratoire de Biotechnologie de l'Environnement [Narbonne] Xénobiotiques Xénobiotiques Xénobiotiques Physicochimie et Ecotoxicologie des SolS d'Agrosystèmes Contaminés Physicochimie et Ecotoxicologie des SolS d'Agrosystèmes Contaminés Physicochimie et Ecotoxicologie des SolS d'Agrosystèmes Contaminés Physicochimie et Ecotoxicologie des SolS d'Agrosystèmes Contaminés Centre national du machinisme agricole, du génie rural, des eaux et forêts Centre national du machinisme agricole, du génie rural, des eaux et forêts Centre national du machinisme agricole, du génie rural, des eaux et forêts Station commune de Recherches en Ichtyophysiologie, Biodiversité et Environnement Station commune de Recherches en Ichtyophysiologie, Biodiversité et Environnement Station commune de Recherches en Ichtyophysiologie, Biodiversité et Environnement Station commune de Recherches en Ichtyophysiologie, Biodiversité et Environnement Station commune de Recherches en Ichtyophysiologie, Biodiversité et Environnement Institut National de la Santé et de la Recherche Médicale Institut National de la Santé et de la Recherche Médicale Institut National de la Santé et de la Recherche Médicale Unité de Recherches en Zoogéographie Unité de Recherches en Zoogéographie Unité de Recherches en Zoogéographie

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Simona OzdenMichel HuerreJean-Pierre RiviereLark L CoffeyPhilippe V AfonsoVincent MoulyJean de MonredonJean-Christophe RogerMohamed El AmraniJean-Luc YvinMarie-Christine JaffarMarie-Pascale FrenkielMarion SourisseauOlivier SchwartzGillian S. Butler-BrownePhilippe DesprèsAntoine GessainPierre-Emmanuel Ceccaldi
• Organismes : Epidémiologie et Physiopathologie des Virus Oncogènes Histotechnologie et Pathologie Service d'Anatomopathologie Interactions Moléculaires Flavivirus-Hôtes Epidémiologie et Physiopathologie des Virus Oncogènes Groupe Myologie Service de Neurologie Service de Neurologie Service de Neurologie Service de Médecine Interne Laboratoire de Biologie Interactions Moléculaires Flavivirus-Hôtes Virus et Immunité Virus et Immunité Groupe Myologie Interactions Moléculaires Flavivirus-Hôtes Epidémiologie et Physiopathologie des Virus Oncogènes Epidémiologie et Physiopathologie des Virus Oncogènes
• Publié dans PLoS ONE le 25/10/2020

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Résumé : BACKGROUND: Chikungunya (CHIK) virus is a mosquito-transmitted alphavirus that causes in humans an acute infection characterised by fever, polyarthralgia, head-ache, and myalgia. Since 2005, the emergence of CHIK virus was associated with an unprecedented magnitude outbreak of CHIK disease in the Indian Ocean. Clinically, this outbreak was characterized by invalidating poly-arthralgia, with myalgia being reported in 97.7% of cases. Since the cellular targets of CHIK virus in humans are unknown, we studied the pathogenic events and targets of CHIK infection in skeletal muscle. METHODOLOGY/PRINCIPAL FINDINGS: Immunohistology on muscle biopsies from two CHIK virus-infected patients with myositic syndrome showed that viral antigens were found exclusively inside skeletal muscle progenitor cells (designed as satelllite cells), and not in muscle fibers. To evaluate the ability of CHIK virus to replicate in human satellite cells, we assessed virus infection on primary human muscle cells; viral growth was observed in CHIK virus-infected satellite cells with a cytopathic effect, whereas myotubes were essentially refractory to infection. CONCLUSIONS/SIGNIFICANCE: This report provides new insights into CHIK virus pathogenesis, since it is the first to identify a cellular target of CHIK virus in humans and to report a selective infection of muscle satellite cells by a viral agent in humans.

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Fichiers liés : journal.pone.0000527.pdf

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2007
• Auteurs : Philippe MontraversJean-Paul MiraJean-Pierre GangneuxO. LeroyO. Lortholary
• Organismes : Service d'anesthésie - réanimation chirurgicale Service de Réanimation Médicale Signalisation et Réponses aux Agents Infectieux et Chimiques Service de Parasitologie-Mycologie [Rennes] Centre d'infectiologie Necker-Pasteur [CHU Necker]

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Philippe NubukpoE. K. GrunitzkyA. PélissoloA. RadjiPierre-Marie PreuxJean-Pierre Clément
• Organismes : Centre de Mémoire de Ressources et de Recherches [Limoges] Neuroépidémiologie Tropicale et Comparée Neuroépidémiologie Tropicale et Comparée Laboratoire de Biostatistique et d'Informatique Médicale Unité Fonctionnelle de Recherche Clinique et de Biostatistique Neuroépidémiologie Tropicale et Comparée Service de Psychiatrie [CHU Limoges]
• Publié dans L'Encéphale le 30/10/2020

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Résumé : INTRODUCTION: There are many studies focusing on personality disorders of the patients with epilepsy in developed countries, using different methods. Such investigations with standardised tools like personality questionnaires lack in African populations in general and among the number of epileptic patients who have important psychosocial problems. In Togo, epilepsy still remains a shameful and contagious disease that leads often unfortunately to a "social death". The number of epileptic patients in this country is estimated around 45,000 and 90,000 and the situation is worst in some areas of the country like in Nadoba, chef-lieu of the Tamberma region where lives an homogenous and stable population that has kept its tradition. DESIGN OF THE STUDY: This study was aimed to show the probable existence of specific personality disorder among the epileptics in Nadoba; 34 epileptics and 34 controls chosen among the closest relatives (parents or co-tenants) matched by age (more or less than ten years old) and sex have been interviewed using the Temperament and Character Inventory (TCI) of Cloninger et al., in its French version validated by P?ssolo and L?ne. The TCI is a self addressed questionnaire that has 226 items with dichotomous and forced answer (true or false) that explores 7 dimensions of personality, 4 concerning temperament and 3 concerning character. Regarding psychometric aspects, the TCI has the particularity to gather together, in a unique tool, the exploration of two complementary dimensions: temperament rather conditional and character that has been acquired. The scores of character allow to differentiate the subjects having a good level of adaptation (high scores, about 100%), from those who, because of an individual fragility, adapt themselves less well (low scores). The temperament profile is used on a second approach to locate the personality disorders, taking into account probable deviations. People participating in this study were also interviewed with the Goldberg anxiety and depression scale. For the statistical analysis, the comparison of means was achieved through bilateral Student't-test. A significance threshold of 0.05 has been used for the analysis. RESULTS: Concerning the results, 67 questionnaires have been selected from 33 epileptics (3 men and 30 women), mean age 29.3 years+/-8.1 and 34 controls (4 men and 30 women), mean age 30.6 years+/-5.6. The average scores obtained from the different items of the TCI scale are summarised in chart 1. The comparison of average scores obtained at each item, sub-dimension and dimension of the TCI, did not show any significant difference between cases and controls. However cases were significantly different from controls (P<0.001) on average Goldberg's anxiety scores (4.6+/-1.5 and 2.6+/-1.3) and depression (4.4+/-2.2 and 0.8+/-0.8). DISCUSSION: The average scores obtained in France in the course of the normative study in general population were rather different. The validation study of the French version of TCI showed differences with the population of North America, suggesting inter cultural differences while evaluating the personality and the necessity of using specific norms during each new translation of the instrument. However, the valued in the French-speaking populations (Belgium, Swiss, Lebanon) are in general very close to the French values. The character and behavioural disorders among are of interest and the difficulty in evaluating the part of hysteria in the manifestation of exhibiting pseudo-seizure of epilepsy is also underlined. This question is raised in Nadoba in women, called "Odueri" or "the women that fall", a particular form of tonico-clonic fits observed in that cultural setting. Is it a question of real epileptic seizure or are these phenomena a kind of trance? This investigation of the Tamberma in Togo urges to set up psychometric studies to define local norms. It also suggests the possible existence of personality traits specific to the "women that fall" but these aspects require further developments.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Moulay-Rachid BabaaJean-Louis BantigniesLaurent AlvarezPhilippe ParentF. Le-NormandMichal GulášJeannot Mane ManePoncharal PhilippeBryan Doyle
• Organismes : Laboratoire des colloïdes, verres et nanomatériaux Laboratoire des colloïdes, verres et nanomatériaux Laboratoire des colloïdes, verres et nanomatériaux Laboratoire de Chimie Physique - Matière et Rayonnement Institut de Physique et Chimie des Matériaux de Strasbourg Institut de Physique et Chimie des Matériaux de Strasbourg Institut de Physique et Chimie des Matériaux de Strasbourg Laboratoire des colloïdes, verres et nanomatériaux Laboratorio Nazionale TASC
• Publié dans Journal of Nanoscience and Nanotechnology le 25/10/2020

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Résumé : Functionalization of multi-walled carbon nanotubes (MWNTs) surface by sulfonated poly (ether ether ketone) SPEEK chains using a direct attachment reaction was investigated. A two step method was performed. MWNTs were oxidized by a nitric acid treatment to generate carboxyl groups on their surface. The grafting reaction of sulfonated groups of SPEEK with carboxyl groups present on the surface of oxidized MWNTs readily proceeds by using hexane diamine as an interlinking molecule. Transmission electron microscopy (TEM) shows that tubes are wrapped by polymer chains. Near edge X-ray absorption fine structure spectroscopy (NEXAFS) at the C K-edge, O K-edge, and N K-edge and X-ray photoelectron spectroscopy (XPS) were used to give evidence of covalent functionalization of MWNTs by SPEEK macromolecules.

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Fichiers liés : babaa2007.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Jozefien GoossensPhilippe Leclaire​Xiaodong XuChrist GlorieuxLoïc MartinezAntonella SolaCristina SiligardiValeria CannilloTom van Der DonckJean-Pierre Celis
• Organismes : Laboratorium voor Akoestiek en Thermische Fysica Laboratorium voor Akoestiek en Thermische Fysica Laboratorium voor Akoestiek en Thermische Fysica Laboratorium voor Akoestiek en Thermische Fysica Equipe Circuit Instrumentation et Modélisation Electronique Department of Materials and Environmental Engineering Department of Materials and Environmental Engineering Department of Materials and Environmental Engineering Department MTM Department MTM
• Publié dans Journal of Applied Physics le 02/11/2020

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Résumé : The potential and limitations of Rayleigh wave spectroscopy to characterize the elastic depth profile of heterogeneous functional gradient materials are investigated by comparing simulations of the surface acoustic wave dispersion curves of different profile-spectrum pairs. This inverse problem is shown to be quite ill posed. The method is then applied to extract information on the depth structure of a glass-ceramic ͑ alumina͒ functionally graded material from experimental data. The surface acoustic wave analysis suggests the presence of a uniform coating region consisting of a mixture of Al2O3 and glass, with a sharp transition between the coating and the substrate. This is confirmed by scanning electron microscope with energy dispersive x-ray analysis.

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Fichiers liés : GLXG.pdf

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