Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2000
• Auteurs : Philippe GaussierCédric JoulainJean-Paul BanquetSacha LepretreArnaud Revel
• Organismes : Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Plasticité cérébrale et adaptations des fonctions visuelles et motrices Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes
• Publié dans Robotics and Autonomous Systems le 29/10/2020

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Résumé : In this paper, we describe how a mobile robot under simple visual control can retrieve a particular goal location in an open environment. Our model neither needs a precise map nor to learn all the possible positions in the environment. The system is a neural architecture inspired by neurobiological analysis of how visual patterns named landmarks are recognized. The robot merges these visual informations and their azimuth to build a plastic representation of its location. This representation is used to learn the best movement to reach the goal. A simple and fast on-line learning of a few places located near the goal allows this goal to be reached from anywhere in its neighborhood. The system uses only a very rough representation of the robot environment and presents very high generalization capabilities. We describe an efficient implementation of autonomous and motivated navigation tested on our robot in real indoor environments. We show the limitations of the model and its possible extensions.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2000
• Auteurs : Ludovic NoelsLaurent StainierJean-Philippe PonthotJérome Bonini
• Organismes : Laboratoire Kastler Brossel Institut de Recherche en Génie Civil et Mécanique European Organization for Nuclear Research SNECMA Villaroche [Moissy-Cramayel]

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2000
• Auteurs : Pierre-Jean BenghoziPatrice FlichyPhilippe d' Iribarne
• Organismes : Centre de Recherche en Gestion Technique Innovation et Organisation (TIO) Centre de Recherche en Gestion

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• Type de publi. :
• Date de publi. : 01/01/2000
• Auteurs : R. LaplanaFrédéric ZahmLaurent PietJean-Marie LescotFrançois BirgandThierry BioteauPierre BordenaveNicolas A TurpinPhilippe BontemsG. RotillonI. BarlundM. KaljonenS. TattariF. FeichtingerP. StraussR. HaverkampM. GarnierAntonio Lo PortoG. BenigniA. LeoneM.N. RipaO.M. EkloE. Romstad
• Organismes : Aménités et dynamiques des espaces ruraux Gestion environnementale et traitement biologique des déchets Institut National de la Recherche Agronomique UNIVERSITE NANTERRE FINNISH ENVIRONMENT INSTITUTE FIN BUNDESAMT FUR WASSERWIRTSCHAFT AUT Université Grenoble Alpes [2016-2019] INSTITUTO DI RICERCA SULLE ACQUE ITA Università degli studi della Tuscia = Tuscia University [Viterbo] Norwegian Crop Research Institute AGRICULTURAL UNIVERSITY OF NORWAY NOR

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Résumé : AgriBMPWater is a european research project of the 5th RTD Framework program. The launching meeting of this project took place at the Cemagref of Rennes during 5 days (September 5-9, 2000) with all the involved partners This report presents the conclusions of the main discussed topics : the research watersheds, the working organisation for each workpackage, the management of the project and the main required tasks. Finally, decisions agreed by the consortium are listed.

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2000
• Auteurs : Philippe GaussierSacha LepretreMathias QuoyArnaud RevelCédric JoulainJean-Paul Banquet
• Organismes : Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Plasticité cérébrale et adaptations des fonctions visuelles et motrices

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• Type de publi. : Rapport
• Date de publi. : 01/01/2000
• Auteurs : Pierre FriedlingsteinLaurent BoppPhilippe CiaisJean-Louis DufresneLaurent FairheadHervé Le TreutPatrick MonfrayJames C. Orr
• Organismes : Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] ICOS-ATC Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]

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Fichiers liés : note19.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2000
• Auteurs : Jean-Philippe SemblatMichel BongiovanniEric WajnbergAntoine DalmassoPierre AbadPhilippe Castagnone-Sereno
• Organismes : University of Glasgow Interactions plantes-microorganismes et santé végétale Réponse des Organismes aux Stress Environnementaux Interactions plantes-microorganismes et santé végétale Institut Sophia Agrobiotech
• Publié dans Heredity le 28/10/2020

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Résumé : Root-knot nematodes (RKN) are sedentary endoparasites causing severe damage to a wide variety of crops, including tomato. Among them, the parthenogenetic species Meloidogyne arenaria, M. incognita and M. javanica are of particular economic importance. The genetic diversity and relationships of 17 populations belonging to these three major species, either avirulent or virulent against the tomato Mi resistance gene, were investigated in order to determine whether (a)virulence of the nematodes could be related to their molecular fingerprints. Genomic polymorphisms between populations were assessed by using amplified fragment length polymorphism (AFLP) markers, and data were treated by means of a multiple correspondence analysis. A total of 1550 polymorphic amplified DNA fragments were identified and used to compute the relationships between the populations. As expected, the three RKN species were clearly distributed into distinct groups, but combination of data for virulence phenotypes and DNA markers showed that clustering of populations was not associated with their (a)virulence against the tomato Mi resistance gene. Such a lack of correlation indicates that most of the observed DNA polymorphism is independent of virulence, which is presumably under host selection. This result demonstrates that virulent populations do not share a common origin, and strongly suggests that they might have appeared late after the establishment of these clonal lineages, as the result of independent mutational events.

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2000
• Auteurs : Jean-Paul BanquetPhilippe GaussierArnaud RevelYves Burnod
• Organismes : Plasticité cérébrale et adaptations des fonctions visuelles et motrices Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Réseau National des Systèmes Complexes

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2000
• Auteurs : Vincent BabeauPhilippe GaussierCédric JoulainArnaud RevelJean-Paul Banquet
• Organismes : Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes Plasticité cérébrale et adaptations des fonctions visuelles et motrices

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• Type de publi. : Communication dans un congrès
• Date de publi. : 01/01/2000
• Auteurs : Jean-Paul BanquetYves BurnodPhilippe GaussierArnaud Revel
• Organismes : Plasticité cérébrale et adaptations des fonctions visuelles et motrices Réseau National des Systèmes Complexes Equipes Traitement de l'Information et Systèmes Equipes Traitement de l'Information et Systèmes

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Résumé : Visually guided landmark navigation is based on space coding by hippocampal place cells (Pc)[2]. A biologically realistic architecture of cooperative-competitive associative networks (implemented as a control system for mobile agents) emulates place cell activity during local navigation (self and goal -localization, and route finding) in exploration and goal-retrieval paradigms. The system builds and stores panoramic views from landmarks and compares these views with current inputs. Mismatch induced low levels of recognition activity during exploration trigger a vigilance burst (by a mechanism inspired from septal modulation) which favors either the recognition of an alternative place category, or the creation of a new category. The sole implementation of visual ¿What¿ and ¿Where¿ information does not restrain the generality of the model since several modalities (proprioceptive and vestibular in particular) could cooperate to give rise to more robust place field spatial categories [5]. Providing the system with real visual inputs automatically extracted from a natural environment demonstrates that interspecies differences [6] in Pc coding (e.g. Pcs in rats vs. view cells in monkeys) result more from characteristics of the visual systems than from differences in Hs processing. Conversely, differences in Pc multiple codes within the same system result according to the model from different levels of processing and/or different degrees of multimodality. Each of these codes could be used within different navigational strategies a control system directly derived from the model allows a mobile agent to learn a few places in an environment, and their associated actions to perform in order to reach a goal. Generalization property of the model provides the capacity to join the goal from any place in the learned environment.

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