Philippe JEAN-PIERRE

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2003
• Auteurs : Jean-Noël BaleoBernard BourgesPhilippe CourcouxCatherine FaurPierre Le Cloirec
• Organismes : Laboratoire de génie des procédés - environnement - agroalimentaire Mines Nantes Laboratoire de génie des procédés - environnement - agroalimentaire Mines Nantes Statistique, Sensométrie et Chimiométrie Laboratoire de génie des procédés - environnement - agroalimentaire Mines Nantes Laboratoire de génie des procédés - environnement - agroalimentaire Mines Nantes

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Résumé : Ce livre traite de l'expérience, de l'expérimentation et de la démarche expérimentale. Il aborde les outils et les méthodes nécessaires à la conception d'une expérience, à sa réalisation et à son exploitation. Sont ainsi présentés successivement l'analyse dimensionnelle, les outils statistiques descriptifs et la modélisation statistique des données, les plans d'expériences, les erreurs de mesures, les réseaux de neurones et enfin la validation des modèles. Des cas concrets et diversifiés sont fournis tout au long de cet ouvrage afin de couvrir un vaste éventail de domaines d'applications. À partir de l'expérimentation, le scientifique dans son laboratoire ou l'ingénieur dans son atelier ou son bureau d'étude se doivent de développer des modèles empiriques avec la connaissance de base des modèles physiques. Chacun d'entre eux trouvera rassemblés dans cet ouvrage les méthodes et les outils qui faciliteront cette démarche.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2003
• Auteurs : Bénédicte Samyn-PetitDubos Jean-Pierre WajdaFrédéric ChiratCoddeville BernadetteGrégory DemaizieresSibille FarrerMarie-Christine SlomiannyManfred TheisenPhilippe Delannoy
• Organismes : Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 Meristem Therapeutics Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 Meristem Therapeutics Meristem Therapeutics Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 Meristem Therapeutics Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576
• Publié dans European Journal of Biochemistry le 23/10/2020

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Résumé : We have compared the site-by-site N-glycosylation status of human lactoferrin (Lf) produced in maize, a monocotyledon, and in tobacco, used as a model dicotyledon. Maize and tobacco plants were stably transformed and recombinant Lf was purified from both seeds and leaves. N-glycopeptides were generated by trypsin digestion of recombinant Lf and purified by reverse-phase HPLC. The N-glycosylation pattern of each site was determined by mass spectrometry. Our results indicated that the N-glycosylation patterns of recombinant Lf produced in maize and tobacco share common structural features. In particular, both N-glycosylation sites of each recombinant Lf are mainly substituted by typical plant paucimannose-type N-glycans, with beta1,2-xylose and alpha1,3-linked fucose at the proximal N-acetylglucosamine. However, tobacco Lf shows a significant amount of processed N-glycans with one or two beta1,2GlcNAc linked to the trimannose core, which are weakly expressed in maize Lf. Finally, no Lewisa epitope was observed on tobacco Lf.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2003
• Auteurs : Jean MartinetYves ChiaramellaPhilippe MulhemIadh Ounis
• Organismes : FOX MIIRE Communication Langagière et Interaction Personne-Système Modélisation et Recherche d’Information Multimédia [Grenoble] School of Computing Science [Glasgow]

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Résumé : We present in this paper a relational approach for indexing and retrieving photographs from a collection. Instead of using simple keywords as an indexing language, we propose to use star-graphs as document descriptors. A star-graph is a conceptual graph that contains a single relation, with some concepts linked to it. They are elementary pieces of information describing combinations of concepts. We use star-graphs as descriptors - or index terms - for image content representation. This allows for relational indexing and expression of complex user needs, in comparison to classical text retrieval, where simple keywords are generally used as document descriptors. We present a document representation model, a weighting scheme for star-graphs inspired by the tf.idf used in text retrieval. We have applied our model to image retrieval, and show the system evaluation results.

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Fichiers liés : cbmi03-submitted.pdf

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• Type de publi. : Rapport
• Date de publi. : 01/01/2003
• Auteurs : Philippe de ReffyeMaurice GoursatJean-Pierre QuadratBaogang Hu
• Organismes : Methods, algorithms and software in automatic control Methods, algorithms and software in automatic control Methods, algorithms and software in automatic control Eco-informatics

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Résumé : We explicit the dynamic equations followed by a tree during its growth according to the Greenlab model. In a first part we explicit the Organogenesis equations. In the second part, we recall the equations which, using a macroscopic photosynthesis point of view, describe with a great precision the evolution of the organ sizes. In a third part we establish the morphogenesis equations describing the geometry of a tree. The three parts are illustrated with an example.

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Fichiers liés : RR-4877.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2003
• Auteurs : Nicolas MercierNicolas MercierPierre FrèrePhilippe BlanchardJean RoncaliMagali AllainChristophe PasquierAmédée Riou
• Organismes : Laboratoire de Physique des Solides - HP
• Publié dans Inorganic Chemistry le 31/10/2020

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Résumé : 2,2′-bithiophene derivatives, 5-ammoniumethylsulfanyl-2,2′-bithiophene (AESBT) and 5,5′-bis(ammoniumethylsulfanyl)-2,2′-bithiophene (BAESBT), have been designed for their incorporation in organic-inorganic materials based on iodometalates. Three layered compounds, (BAESBT)Pbl4, (AESBT) 4Pb3l10, and (AESBT)3Bl 2l9, have been synthesized as crystals from slowly cooled aqueous solution containing metal halide and bithiophene derivative salts. When starting from the diammonium cation, (BAESBT)Pbl4 hybrid perovskite is obtained. (BAESBT)Pbl4 adopts a triclinic cell (P1̄) with the lattice parameters a = 8.4741(5) Å, b = 8.9255(6) Å, c = 16.876(1) Å, α = 88.328(5)°, β = 81.806(4)°, γ = 88.864(5)°, Z = 2. In the structure, Pbl42- perovskite sheets and diammonium cation layers alternate along c. The incorporation of the corresponding monoammonium cation (AESBT) leads to a head to tail arrangement of the molecules in the (AESBT)4Pb 3l10 hybrid, precluding the formation of the perovskite layers. (AESBT)4Pb3l10 is orthorhombic, Pna21, with a = 38.333(4) Å, b = 22.239(3) Å, c = 8.448(2) Å, Z = 4. The structure consists of corrugated layers of Pb 3l104- separated by organic layers of monoammonium cations. A similar relative situation of molecules in organic layers is observed in (AESBT)3Bi2l9, with the inorganic sheets being built up from Bi2l93- entities. (AESBT)3Bi2l9 crystallizes in an orthorhombic cell (P212121) with a = 8.4564(6) Å, b = 21.368(2) Å, c = 30.747(2) Å, Z = 4. In the three compounds, the molecular packings appear different, underlining the interplay between both organic and inorganic components. New packings are stabilized, as illustrated by an original mixed kappa-alpha type arrangement of the bithiophene units in (AESBT)3Bi2l9. Furthermore, molecular interactions, especially of S...S type, appear stronger in the hybrids based on the monoammonium cations. The electrical conductivity of a (BAESBT)Pbl4 single crystal has also been investigated, revealing a semiconductive behavior with a characteristic energy of E g = 2.535 eV.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2003
• Auteurs : Tantely RandriambeloJean-Luc BaraySerge BaldyA. M. ThompsonS. OltmansPhilippe Keckhut
• Organismes : Laboratoire de l'Atmosphère et des Cyclones Laboratoire de l'Atmosphère et des Cyclones Laboratoire de l'Atmosphère et des Cyclones NASA Goddard Laboratory for Atmosphere NOAA Climate Monitoring and Diagnostics Laboratory Service d'aéronomie
• Publié dans Annales Geophysicae le 26/10/2020

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Résumé : Since 1998, a ground-based tropospheric ozone lidar has been running at Reunion Island and has been involved with a daily measurement campaign that was performed in the latter part of the biomass burning season, during November–December 1999. The averaged ozone profile obtained during November–December 1999 agrees well with the averaged ozone profile obtained from the ozonesondes launch at Reunion during November–December (1992– 2001). Comparing weekly sonde launches (part of the Southern Hemisphere Additional Ozonesondes: SHADOZ program) with the daily ground-based lidar observations shows that some striking features of the day-to-day variability profiles are not observed in the sonde measurements. Ozone profiles respond to the nature of disturbances which vary from one day to the next. The vertical ozone distribution at Reunion is examined as a function of prevailing atmospheric circulation. Back trajectories show that most of the enhanced ozone crossed over biomass burning and convectively active regions in Madagascar and the southern African continent. The analyses of the meteorological data show that ozone stratification profiles are in agreement with the movement of the synoptic situations in November–December 1999. Three different sequences of transport are explained using wind fields. The first sequence from 23 to 25 November is characterized by northerly transport; during the second sequence from 26 to 30 November, the air masses are influenced by meridional transport. The third sequence from 2 to 6 December is characterized by westerly transport associated with the sub-tropical jet stream. The large, standard deviations of lidar profiles in the middle and upper troposphere are in agreement with the upper wind variabilities which evidence passing ridge and trough disturbances. During the transition period between the dry season and the wet season, multiple ozone sources including stratosphere-troposphere exchanges, convection and biomass burning contribute to tropospheric ozone at Reunion Island through sporadic events characterized by a large spatial and temporal variability.

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Fichiers liés : angeo-21-2095-2003.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2003
• Auteurs : Philippe BorgardJean-Pierre BrunLeguilloux MartineMarie Tuffreau-Libre
• Organismes : Centre Camille Jullian - Histoire et archéologie de la Méditerranée et de l'Afrique du Nord de la protohistoire à la fin de l'Antiquité Centre Jean Berard Centre Archéologique du Var Civilisations atlantiques & Archéosciences
• Publié dans Rivista di Studi Pompeiani le 22/01/2018

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2003
• Auteurs : Gilles DusserreSophie SauvagnarguesAurélia Bony-DandrieuxJérôme TixierSébastien Rault DoumaxPierre-Alain AyralJean-Philippe DimbourKarin HaldDaas Jabbour
• Organismes : Laboratoire de Génie de l'Environnement Industriel Laboratoire de Génie de l'Environnement Industriel Laboratoire de Génie de l'Environnement Industriel Laboratoire de Génie de l'Environnement Industriel Laboratoire de Génie de l'Environnement Industriel
• Publié dans Réalités industrielles. Annales des mines le 29/10/2020

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Fichiers liés : Contribution_a_laide_a_la_decision_en_situation_d.pdf

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2003
• Auteurs : Christophe RoosPhilippe CrenJean DalibardDavid Guéry-Odelin
• Organismes : Laboratoire Kastler Brossel Laboratoire Kastler Brossel Laboratoire Kastler Brossel Laboratoire Kastler Brossel

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Résumé : We present an intense source of $^{87}$Rb atoms that has been set up to produce a continuous, slow and cold beam in a magnetic guide. It consists of a two-dimensional magneto-optical trap whose cooling laser power is provided by a master-oscillator tapered-amplifier system. This trap produces an atomic beam with a flux of over $10^{10}$ atoms/s and a mean velocity of 40 m/s. The beam is recaptured by a second trap whose purpose consists in reducing the beam's velocity, in further cooling the atoms and injecting them into the magnetic guide. The article focusses on the first stage of the process described above.

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2003
• Auteurs : Philippe Tétart
• Organismes : Centre d'histoire de Sciences Po (Sciences Po)

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