Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2005
• Auteurs : Eric BertinJean-Philippe BouchaudFrançois Lequeux
• Organismes : department of theoretical physics Service de physique de l'état condensé Physico-Chimie des Polymères
• Publié dans Physical Review Letters le 02/11/2020

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Résumé : We study a kinetically constrained lattice glass model in which continuous local densities are randomly redistributed on neighbouring sites with a kinetic constraint that inhibits the process at high densities, and a random bias accounting for attractive or repulsive interactions. The full steady-state distribution can be computed exactly in any space dimension d. Dynamical heterogeneities are characterized by a length scale that diverges when approaching the critical density. The glassy dynamics of the model can be described as a reaction-diffusion process for the mobile regions. The motion of mobile regions is found to be subdiffusive, for a large range of parameters, due to a self-induced trapping mechanism.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2005
• Auteurs : J. TemplierSylvie DerenneJean-Philippe CrouéC. Largeau
• Organismes : Biogéochimie et écologie des milieux continentaux Laboratoire de Chimie de l'Eau et de l'Environnement [ESA 6008] Biogéochimie et écologie des milieux continentaux
• Publié dans Organic Geochemistry le 02/11/2020

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Résumé : Two fractions of dissolved organic matter (DOM) from a French river, the Gartempe, were obtained using the XAD resin fractionation procedure and were termed hydrophobic acid (HPOA) and transphilic acid (TPIA) according to this method. The composition of these two fractions was investigated with solid state CP/MAS ¹³C NMR, Curie point pyrolysis at 650 °C, with and without tetramethylammonium hydroxide (TMAH), and off-line TMAH thermochemolysis at 250 °C. Separation and identification of the released compounds were performed using gas-chromatography/mass spectrometry (GC/MS). The combination of these techniques allowed determination of the molecular characteristics of each fraction and showed large differences in composition. Solid state CP/MAS ¹³C NMR revealed a major contribution of lignin-derived units to the hydrophobic acid fraction and the predominance of cellulose in the transphilic acid fraction. Identification of specific molecular structures upon conventional on-line pyrolysis revealed a predominantly lignin type origin for the HPOA fraction and a cellulose one for the TPIA fraction, whereas on-line TMAH/pyrolysis confirmed the presence of acids, phenolic acids and aliphatic diacids, also indicated by solid state CP/MAS ¹³C NMR in both fractions. Off-line TMAH thermochemolysis was determinant for evidencing the presence of amino acids.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2005
• Auteurs : Xavier RodetJean-Philippe LambertRoland CahenThomas GaudyFlorian GosselinFabrice GuédyPascal Mobuchon
• Organismes : Analyse et synthèse sonores [Paris] Analyse et synthèse sonores [Paris] Analyse et synthèse sonores [Paris] Analyse et synthèse sonores [Paris] Analyse et synthèse sonores [Paris] Analyse et synthèse sonores [Paris] Analyse et synthèse sonores [Paris]

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Résumé : Sound and music control using haptic and visual feedback in the PHASE installation

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2005
• Auteurs : Philippe Moulis
• Organismes : Religions et croyances LAboratoire de Recherche Historique Rhône-Alpes - UMR5190

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• Type de publi. :
• Date de publi. : 01/01/2005
• Auteurs : Luke MacaleeseJoël LemairePierre BoisselJean-Yves SalpinJean-Michel OrtegaFrancois GlotinPhilippe Maıtre
• Organismes : Laboratoire de Chimie Physique D'Orsay Laboratoire de Chimie Physique D'Orsay Laboratoire de Chimie Physique D'Orsay Laboratoire Analyse et environnement Laboratoire pour l'utilisation du rayonnement électromagnétique Laboratoire pour l'utilisation du rayonnement électromagnétique Laboratoire de Chimie Physique D'Orsay

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Résumé : CLIO Laser power (3-90 um) + OPOs CLIO Laser power for various electron energies CLIO characteristics : • infrared domain from 100 to 3000 cm-1  overview of the « infrared fingerprint » region • continuous & rapid tuneability  full spectrum (800-1600cm-1) in typically 1 hour • spectral width around 0.2-0.5 % of central wavenumber (i.e. from  from 8 to 4 cm-1) • continuous high power over all range (~800mW) time time 40 msec 8 sec 1 psec 16 nsec =60-70 J CLIO : a pulsed laser with a particular time structure

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Fichiers liés : poster-Infraredspectroscopy_ASMS2005.pdf

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2005
• Auteurs : Philippe BaptisteNarendra JussienPierre Lopez
• Organismes : Laboratoire d'informatique de l'École polytechnique [Palaiseau] Theory, Algorithms and Systems for Constraints LAAS-MOGISA

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Résumé : no abstract

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2005
• Auteurs : Marie-Hélène LindicBrigitte PecquenardPhilippe VinatierAlain LevasseurHervé MartinezDanielle GonbeauEmmanuel PetitGuy G. Ouvrard
• Organismes : Institut de Chimie de la Matière Condensée de Bordeaux Institut de Chimie de la Matière Condensée de Bordeaux Institut de Chimie de la Matière Condensée de Bordeaux Institut de Chimie de la Matière Condensée de Bordeaux Laboratoire de Chimie théorique et Physico-chimie moléculaire Laboratoire de Chimie théorique et Physico-chimie moléculaire Institut des Matériaux Jean Rouxel Institut des Matériaux Jean Rouxel
• Publié dans Journal of The Electrochemical Society le 30/10/2020

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Résumé : Amorphous thin films were prepared by radio frequency magnetron sputtering from TiS2 target under pure argon atmosphere. Two complementary techniques, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy, were used to investigate the local and electronic structure of the as-prepared sample and to study the electrochemical mechanisms occurring during the first cycle. The results exhibit that the as-prepared TiO0.6S2.8 thin film is close to bulk TiS3 [which may be viewed as Ti41(S2 2 2)S22] with regard to the local and electronic structure. An electrochemical characterization of the film was performed. Upon lithium insertion, sulfur is first involved in the electrochemical reduction, followed by titanium. The reduction of S2 2 2 to S22 is concomitant with the elongation of the distance between the two sulfur ions of the disulfide pair. At the end of the charge, the electrochemical processes appear to be reversible. This study clearly evidences the major contribution of sulfur atoms beside titanium.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2005
• Auteurs : Guillaume FerlatJean-Christophe SoetensAlfonso San-MiguelPhilippe-Anthony Bopp
• Organismes : Institut de minéralogie et de physique des milieux condensés Laboratoire de Physico-Chimie Moléculaire Laboratoire de Physique de la Matière Condensée et Nanostructures Laboratoire de Physico-Chimie Moléculaire
• Publié dans Journal of Physics: Condensed Matter le 26/10/2020

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Résumé : Over the past two decades x-ray absorption spectroscopy has proven to be a valuable tool for the study of the short-range order in a wide variety of materials, including disordered systems such as superionic conductors as well as glasses, amorphous and liquid systems in general. A number of methods have been proposed to analyse EXAFS data. However, in the case of disordered systems, only the ones taking the distribution of atomic environments into account should be retained. Molecular dynamics (MD) simulations are a valuable tool in this respect, as will be shown from results obtained in a supercritical aqueous solution.

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• Type de publi. : Rapport
• Date de publi. : 01/01/2005
• Auteurs : Jean-Pierre BraccoPhilippe AlixMarina de Araújo IgrejaCéline Bressy-LeandriPierre BoduJean CombierMahaut DiganLaure FontanaBernard GélyMarie-Fanny GalanteBertrand KervazoDamien PesesseJérôme PrimaultAndré MoralaMathieu Rué
• Organismes : Economies, sociétés et environnements préhistoriques Economies, sociétés et environnements préhistoriques Economies, sociétés et environnements préhistoriques Economies, sociétés et environnements préhistoriques Economies, sociétés et environnements préhistoriques Economies, sociétés et environnements préhistoriques Groupe de Recherche Archéologique de Tournus

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2005
• Auteurs : Mishra Sanjay KumarRajeev RanjanDhananjai PandeyPierre RansonRobert OuillonJean-Paul Pinan-LucarrePhilippe Pruzan
• Organismes : Banaras Hindu University [Varanasi, India] Banaras Hindu University [Varanasi, India] Banaras Hindu University [Varanasi, India] Institut de minéralogie et de physique des milieux condensés Institut de minéralogie et de physique des milieux condensés Institut de minéralogie et de physique des milieux condensés Institut de minéralogie et de physique des milieux condensés
• Publié dans Journal of Solid State Chemistry le 26/10/2020

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Résumé : Results of powder X-ray diffraction and Raman scattering studies on the phase transitions in Sr1−xCaxTiO3 (SCT) are presented for x=0.04, 0.06 and 0.12 in the temperature range 8–473 K. It is proposed that the space group of SCT in the composition range 0.06less-than-or-equals, slantxless-than-or-equals, slant0.35 is Imma with a0b-b- tilt system and not I4/mcm with a0a0c- tilt system, as assumed by earlier workers. The lowering of the crystal symmetry from I4/mcm to Imma is supported by the observation of additional Raman lines, in agreement with the factor group analysis for the Imma space group. The structural Eg mode, characteristics of the non-cubic phase, is shown to be present even in the cubic phases of x=0.06 and x=0.12 but not of x=0.04 indicating the change in the local structure of the cubic phase of SCT for xgreater-or-equal, slanted0.06. The presence of symmetry forbidden TO2 mode in the Raman spectra of the cubic phase of SCT for x<0.06 and its absence for xgreater-or-equal, slanted0.06 provides yet another characteristic feature distinguishing the I4/mcm and Imma space groups. The implications of the change in the tilt system from a0a0c- to a0b-b- on the development of the polar order is also discussed.

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