Philippe Jean-Pierre

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/1991
• Auteurs : Laurent JolivetPhilippe HuchonXavier Le PichonNicolas Chamot-RookeJean-Charles ThomasJean-Pierre Brun
• Organismes : Département de Géologie Institut des Sciences de la Terre d'Orléans Département de Géologie Institut des Sciences de la Terre de Paris Département de Géologie Collège de France - Chaire Géodynamique Département de Géologie Laboratoire de géologie de l'ENS Département de Géologie Centre National de la Recherche Scientifique
• Publié dans Journal of Geophysical Research : Solid Earth le 27/10/2020

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Résumé : We discuss the opening mechanism of the Japan Sea in Miocene time using (1) tectonic and published paleomagnetic data along the eastern margin from the north of Hokkaido Island to Sado Island, (2) a mechanical model which is tested by small-scale physical modeling, and (3) crustal structure and bathymetric features in the Japan Sea which constrain our kinematic model and preopening reconstructions. Our main conclusions are the following. The eastern margin of the Japan Sea was, as a whole, a dextral shear zone about 100 km wide. This conclusion is supported by the existence of a ductile dextral shear zone in Central Hokkaido (Hidaka Mountains) and associated brittle deformation in western Hokkaido and northeastern Honshu. The stress field during the opening (which ended about 12 Ma ago at the end of the middle Miocene) changes from right-lateral transpression in the north to right-lateral transtension in the south. The western margin, along the Korean peninsula, during the same period, also was an active dextral shear zone. Paleomagnetic results indicate that clockwise rotations occurred in the south during the opening and counterclockwise rotations in the north. We propose a model of right-lateral pull-apart deformation with clockwise rotations of rigid blocks in the southern transtensional domain and counterclockwise rotations in the transpressional one. Small-scale physical models show that the clockwise rotation in transtension is possible provided that the eastern boundary (Pacific side) is free of stress. The opening stopped and compression subsequently began about 12 Ma ago. Finally, we show that the dextral shear, which is distributed over the whole Japan Sea area, is accommodated by N-S trending right-lateral faults and rotation of blocks located between these right-lateral faults.

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Fichiers liés : 90JB02455.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/12/1990
• Auteurs : Philippe IldefonseJean-Pierre MullerBlandine ClozelGeorges Calas
• Organismes : Laboratoire de minéralogie, cristallographie de Paris Laboratoire de minéralogie, cristallographie de Paris ORSTOM Laboratoire de minéralogie, cristallographie de Paris Laboratoire de minéralogie, cristallographie de Paris
• Publié dans Engineering Geology le 22/10/2020

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Résumé : U-deposit hosted in hydrothermally altered tuffs in Mexico, together with weathering profiles from Cameroon were studied as natural analogues of radionuclide release and migration. Using petrological and spectroscopic methods (infrared and electron paramagnetic resonance), we have distinguished successive secondary mineral parageneses and the behaviour of radionuclides. In the U-deposit, the mineral parageneses show that uranium migration is mainly controlled by the redox potential and silica activity of the altering solutions. The high silica content of the solutions is caused by the intense alteration of volcanic rocks. Two types of secondary clay mineral parageneses are evidenced: a kaolinization, intense where uranium is accumulated in the welded tuffs, and a smectitization mainly developed in the underlying weakly welded tuffs. Several types of kaolinite have been defined according to their genesis (fillings in fissures and feldspar pseudomorphs), their location relative to a breccia pipe where uranium has accumulated (core and rim of the pipe; surrounding rhyolitic tuffs), and particle morphology, structural order and substitutional Fecontent. It is shown that the variations of the concentration of paramagnetic defect centres, always more than ten times as important than those measured in weathering kaolinites, are only correlated to the location of the kaolinites. The highest values correspond to the breccia pipe kaolinites, e.g. kaolinites located in the uranium accumulation zones. Moreover, one or two main defects centres are detected depending on the intimate association of kaolinites with uranium-bearing minerals. Besides, in weathering kaolinites from U-depleted laterites, defect centre concentrations are correlated to the total Fe203 content in bulk samples. This means that the defect centre acts as a memory of the travel of uranium when this element was sorbed onto iron gels in the first stage of weathering. It is concluded that paramagnetic defect centres in kaolinites might allow an efficient fingerprint of successive irradiations in the natural analogues under study and could be an useful tool to control radionuclides migration through kaolinite-containing clayey materials such as those used for waste repository. A better understanding of radiation efficiency as well as accurate dose-ratekaolinite-containing clayey materials such as those used for waste reposit estimation are needed for a quantitative tracing of the migration ofA better understanding of radiation efficiency as well as accurate dose-ratekaolin radionuclide elements. With this aim, a simulation has been undertaken withestimation are needed for a quantitative tracing of the migration of various radiations sources. We have determined for each irradiation the parameters of the paramagnetic centres created in order to understand the way they are forming. The knowledge of the parameters governing the formation and the stability of the radiation centres in kaolinites allow to use this mineral as a natural dosimeter.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/11/1990
• Auteurs : Jean-Marie AuzendeEiichi HonzaXavier BoespflugSatendra DeoJean-Philippe EissenJun HashimotoPhilippe HuchonJunichiro IshibashiYo IwabuchiPhilip JarvisMasato JoshimaKiyoyuki KisimotoYasuto KuwaharaYves LafoyTsuyoshi MatsumotoJean-Pierre MazeKiyohiko MitsuzawaHiroyasu MonmaTakeshi NaganumaYukihiro NojiriSuguru OhtaKiyoshi OtsukaYoshihisa OkudaHélène OndreasAkira OtsukiÉtienne RuellanMyriam SibuetManabu TanahashiTakeo TanakaTetsuro Urabe
• Organismes : Institut Français de Recherche pour l'Exploitation de la Mer Institut de Recherche pour le Développement Géosciences Environnement Toulouse Geological Survey of Japan
• Publié dans Marine Geophysical Research le 28/10/2020

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• Type de publi. : Article dans une revue
• Date de publi. : 15/08/1990
• Auteurs : Bonnel PhilippePierre LefebvreBernard GilHenry MathieuChristiane DeparisJeans MassiesNeu GérardYong Chen
• Organismes : Groupe d'étude des semiconducteurs Groupe d'étude des semiconducteurs Groupe d'étude des semiconducteurs Groupe d'étude des semiconducteurs Centre de recherche sur l'hétéroepitaxie et ses applications Centre de recherche sur l'hétéroepitaxie et ses applications Centre de recherche sur l'hétéroepitaxie et ses applications Scuola Normale Superiore di Pisa
• Publié dans Physical Review B: Condensed Matter and Materials Physics (1998-2015) le 02/11/2020

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Résumé : Reflectance spectra are studied for both symmetric and asymmetric double-quantum-well structures separated by intermediate barriers with various thicknesses. It is shown that the interwell couplings versus the tunneling of the carriers across the barrier has a significant influence on the optical transition properties. Quantitative analyses are presented, which help to identify a number of transitions involving excited states, in asymmetric double wells. A theoretical model agrees with experimental results in several aspects: the interband transition energies, the transition probabilities, and the broadening of the reflectance structures. The effects of interfacial roughness and alloy disorder, in both symmetric and asymmetric systems, are carefully analyzed, which provides a new insight into the broadening of the optical transitions, due to interfacial morphology.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 08/07/1990
• Auteurs : Pierre BoherPhilippe HoudyLouis HennetJean-Pierre DelaboudiniereMikhael KuehnePeter MuellerZhigang LiDavid Smith
• Organismes : Laboratoire d'électronique de Philips Laboratoire d'électronique de Philips Laboratoire d'électronique de Philips Institut d'astrophysique spatiale

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• Type de publi. : Article dans une revue
• Date de publi. : 01/07/1990
• Auteurs : Brigitte Attal-TrétoutPaul BouchardyPhilippe MagreM. PéalatJean-Pierre Taran
• Organismes : ONERA - The French Aerospace Lab [Châtillon] ONERA - The French Aerospace Lab [Châtillon] ONERA - The French Aerospace Lab [Châtillon] ONERA - The French Aerospace Lab [Châtillon] ONERA - The French Aerospace Lab [Châtillon]
• Publié dans Applied Physics B - Laser and Optics le 28/10/2020

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Résumé : The principles of CARS are reviewed. This technique has achieved important successes in combustion, but its use has been limited mostly to temperature measurements. We demonstrate the feasibility of sensitive single-shot concentration measurements (to 0.2%) with fair accuracy, in spite of the adverse effects of turbulence and saturation. Even better sensitivities will be achieved using electronic resonance enhancement.

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• Type de publi. : Pré-publication, Document de travail
• Date de publi. : 01/03/1990
• Auteurs : Christine GuégnardPhilippe BelDamien BrochierGabriel FrancartAlain KokosowskiPhilippe MouyPierre NeuquelmanElisabeth PascaudMarie-Claude RebeuhJean-Louis ReboulMichel-Henri GensbittelFrançoise DautyLaurent BultotPatrick Lechaux
• Organismes : Institut de recherche sur l'éducation : Sociologie et Economie de l'Education Centre d'études et de recherches sur les qualifications Laboratoire d'Economie et de Sociologie du Travail OPEQ, rattaché à la CRCI CIA CEREQ Institut de Recherche Économique sur la Production et le Développement Rectorat de Rouen Comité de Coordination des Programmes Régionaux de la Formation Professionnelle et de l’Apprentissage Bureau d'Économie Théorique et Appliquée SES Ministère du Travail Centre d'études et de recherches sur les qualifications CIA CEREQ Toulouse ORFQE LilIe Travail, Emploi et Politiques Publiques
• Publié dans Documents de travail du CEREQ le 20/04/2021

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Résumé : Depuis une vingtaine d'années, et plus encore depuis la mise en place de la décentralisation, des systèmes d'aide à la décision sont demandés par les décideurs régionaux et locaux en matière de formation initiale et continue. Pour tirer les leçons des expériences passées et formuler des propositions pour le développement des observatoires régionaux de l'emploi et de la formation, prévus dans le cadre des contrats de Plan Etat - Région, le C.E.R.E.Q. a pris l'initiative de réunir un groupe de travail, dont les premières réflexions sont relatées ici. Il insiste particulièrement sur la prise en compte de l'évolution socio-économique des comportements et des stratégies des divers intervenants. Il décrit les logiques des principaux protagonistes de la relation Formation-Emploi, indique dans quelle voie les travaux devront se poursuivre et conclut que l'harmonie entre formation et emploi ne se réalisera pas par la recherche d'une impossible adéquation, mais bien plus par la convergence des comportements et des projets des différents protagonistes.

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/1990
• Auteurs : Jean BraudJean-Luc DupoueyXavier GauquelinPierre GeldreichAnne MadesclairePhilippe Thévenet
• Organismes : Centre National de la Propriété Forestière Unité d'écophysiologie forestière Office national des forêts Office national des forêts Centre National de la Propriété Forestière Centre National de la Propriété Forestière

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Fichiers liés : Dupouey_1990_InLeChoixdesEssencesForestières_1.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/1990
• Auteurs : D.G. BarkerSarah BianchiF. BlondonY. DattéGérard DucS. EssadP. FlamentPhilippe GallusciG. GenierPierre GuyX. MuelJ. TourneurJean DenariéT. Huguet
• Organismes : UMR 0102 - Unité de Recherche Génétique et Ecophysiologie des Légumineuses Unité de recherche Génétique et Amélioration des Plantes Fourragères Laboratoire de biologie cellulaire et moléculaire Laboratoire de Biologie moléculaire des relations plantes-microorganismes Laboratoire de Biologie moléculaire des relations plantes-microorganismes
• Publié dans Plant Molecular Biology Reporter le 02/11/2020

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/1990
• Auteurs : Christian GachetAnita StierleJean-Pierre CazenavePhilippe OhlmannFrançois LanzaCyrille BoulouxJean-Pierre Maffrand
• Organismes :
• Publié dans Biochemical Pharmacology le 28/10/2020

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Résumé : The thienopyridines, ticlopidine and PCR 4099, inhibit ex vivo aggregation in response to ADP and other agonists. It has been shown that ticlopidine induces a functional defect in the binding of fibrinogen to its platelet membrane receptor. We have studied the effects on platelet functions of PCR 4099 in rat and in man. The aim of the study was to check the possibility of a direct modification of the fibrinogen binding site on the GP IIb-IIIa complex. Washed platelet suspensions were used for aggregation and fibrinogen binding studies. Platelet lysates were submitted to SDS-polyacrylamide gel electrophoresis, crossed immunoelectrophoresis and immunoprecipitation. We found that administration of PCR 4099 inhibited selectively and irreversibly ADP-induced aggregation. Although the effect of ADP on aggregation was blocked, PCR 4099 did not modify ADP-induced shape change. Only the effects of low concentrations of thrombin on platelet aggregation were inhibited. Fibrinogen binding was dramatically inhibited in rat and in man when platelets were stimulated with ADP and low concentrations of thrombin. At high concentration of thrombin there still remained a part of fibrinogen binding inhibition although aggregation was not impaired. Electrophoretic and immunoelectrophoretic studies showed no difference before and after treatment by PCR 4099. In particular, the GP IIb-IIIa-complex was not dissociated, its electrophoretic mobility was not changed and three monoclonal anticomplex antibodies recognized it in the same manner before and after treatment. We conclude that PCR 4099 selectively inhibits the ADP aggregation pathway and that the inhibition of fibrinogen binding is probably not due to a direct modification of the GP IIb-IIIa complex.

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