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Registros recuperados: 25
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A participatory scenario method to explore the future of marine social-ecological systems ArchiMer
Planque, Benjamin; Mullon, Christian; Arneberg, Per; Eide, Arne; Fromentin, Jean-marc; Heymans, Johanna Jacomina; Hoel, Alf Håkon; Niiranen, Susa; Ottersen, Geir; Sandø, Anne Britt; Sommerkorn, Martin; Thébaud, Olivier; Thorvik, Thorbjørn.
Anticipating future changes in marine social‐ecological systems (MSES) several decades into the future is essential in the context of accelerating global change. This is challenging in situations where actors do not share common understandings, practices, or visions about the future. We introduce a dedicated scenario method for the development of MSES scenarios in a participatory context. The objective is to allow different actors to jointly develop scenarios which contain their multiple visions of the future. The method starts from four perspectives: “fisheries management,” “ecosystem,” “ocean climate,” and “global context and governance” for which current status and recent trends are summarized. Contrasted scenarios about possible futures are elaborated...
Tipo: Text Palavras-chave: Barents Sea; Future studies; Multiple perspectives; Participatory fisheries management; Storylines; Uncertainty.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00485/59621/62647.pdf
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An "oriented-object" computer construction of deforming fractal soil structures : determination of their water properties IRD
Perrier, Edith; Mullon, Christian; Rieu, Michel; Marsily, G. de.
In order to study relationships between soil water properties and soil structural properties, a computer micro-model of soil is constructed. In this paper, we present first a general building method of a porous structure, including both pores and grains, with different levels of aggregation resulting from a fragmentation process. A fractal structure is obtained when self-similarity is imposed over the successive scales of fragmentation. Emphasis is put upon the modeling of the retention curve. A classical capillary model and methods coming from the percolation theory enable us to simulate qualitatively the primary and secondary loops of the well-known hysteresis of this curve. In the fractal case, theoretical analytical expressions proposed for adjusting...
Tipo: Text Palavras-chave: STRUCTURE DU SOL; EAU DU SOL; PROPRIETE HYDRIQUE; MODELISATION; SIMULATION; POROSITE; HYDRODYNAMIQUE; MICROORDINATEUR; FRACTAL; LANGAGE ORIENTE OBJET.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:41305
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Architecture d'infothèque pour le partage et la diffusion de résultats de recherche : l'exemple de la communauté scientifique autour du delta intérieur du Niger IRD
Dzéakou, P.; Morand, Pierre; Mullon, Christian; Poncet, Yveline; Demiame, J.C..
Tipo: Text Palavras-chave: INFORMATION SCIENTIFIQUE ET TECHNIQUE; OBSERVATOIRE; GESTION DE L'ENVIRONNEMENT; MILIEU DELTAIQUE; TRAITEMENT DE L'INFORMATION; INTERFACE; RECHERCHE DE L'INFORMATION; BASE DE DONNEES; SYSTEME D'INFORMATION.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010030403
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Climprood : a fully interactive expert system software for choosing and adjusting a global production model wich account for changes in environnemental factors IRD
Fréon, Pierre; Mullon, Christian; Pichon, Gaston.
Various equations allowing for the introduction of an environmental variable into different surplus production models were proposed by the first author. CLIMPROD is an experimental expert-system, using artificial intelligence, which provides a statistical and graphical description of the data set and helps the user to select the model corresponding to his case according to objective criteria. The software fits the model to the data set using a non-linear regression routine, and assesses the fit with parametric and non-parametric tests, and provides a graphical representation of the results. An example is provided on a pelagic stock, showing the strong effect of environment on long-term variability. (Résumé d'auteur)
Tipo: Text Palavras-chave: ESTIMATION DE STOCK; DYNAMIQUE DE POPULATION; UPWELLING; PROGRAMME D'APPLICATION; SYSTEME EXPERT; MODELISATION; RELATION ESPECE ENVIRONNEMENT; MODELE DE PRODUCTION.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:35697
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Computer construction of fractal soil structures : simulation of their hydraulic and shrinkage properties IRD
Perrier, Edith; Mullon, Christian; Rieu, Michel; Marsily, G. de.
Tipo: Text Palavras-chave: STRUCTURE DU SOL; POROSITE; EAU DU SOL; PROPRIETE HYDRIQUE; HYDRODYNAMIQUE; SIMULATION; MODELISATION; FRACTAL.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010004079
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Diurnal variation in fish density estimate during acoustic surveys in relation to spatial distribution and avoidance reaction IRD
Fréon, Pierre; Soria, Marc; Mullon, Christian; Gerlotto, François.
Tipo: Text Palavras-chave: CAMPAGNE OCEANOGRAPHIQUE; PROSPECTION ACOUSTIQUE; POISSON MARIN; ESPECE PELAGIQUE; ECHOINTEGRATION; RYTHME NYCTHEMERAL; DISTRIBUTION QUANTITATIVE; DENSITE; ETHOLOGIE; ECHANTILLONNAGE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:010023167
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Eléments pour une analyse critique des systèmes d'information géographique IRD
Mullon, Christian; Boursier, P..
Nous dressons dans cet article un panorama des projets de systèmes d'informations géographique (SIG), et nous les analysons de différents points de vue, notamment en fonction de leur orgine, de leur problématique, ou du mode de circulation des informations qu'ils sous-tendent. Cette analyse aboutit à une typologie des projets de SIG, et au-delà, elle permet de poser les bases d'un guide méthodologique des SIG, destiné aux entreprises, aux collectivités locales, ainsi qu'aux organismes de recherche confrontés à l'évaluation à priori ou à posteriori de projets de SIG. (Résumé d'auteur)
Tipo: Text Palavras-chave: SYSTEME D'INFORMATION GEOGRAPHIQUE; TYPOLOGIE; EVALUATION; METHODOLOGIE; PROJET DE RECHERCHE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:38101
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Estimating the economic loss of recent North Atlantic fisheries management ArchiMer
Merino, Gorka; Barange, Manuel; Fernandes, Jose A.; Mullon, Christian; Cheung, William; Trenkel, Verena; Lam, Vicky.
It is accepted that world’s fisheries are not generally exploited at their biological or their economic optimum. Most fisheries assessments focus on the biological capacity of fish stocks to respond to harvesting and few have attempted to estimate the economic efficiency at which ecosystems are exploited. The latter is important as fisheries contribute considerably to the economic development of many coastal communities. Here we estimate the overall potential economic rent for the fishing industry in the North Atlantic to be B€ 12.85, compared to current estimated profits of B€ 0.63. The difference between the potential and the net profits obtained from North Atlantic fisheries is therefore B€ 12.22. In order to increase the profits of North Atlantic...
Tipo: Text
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00188/29973/28426.pdf
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Expérimentation sur mondes artificiels : pour une réflexion méthodologique IRD
Treuil, Jean-Pierre; Mullon, Christian.
Tipo: Text Palavras-chave: INTELLIGENCE ARTIFICIELLE; SCIENCES SOCIALES; SIMULATION; MODELISATION; EXPERIMENTATION; METHODOLOGIE; SCIENCES NATURELLES; SYSTEME MULTI AGENTS; TRANSFERT D'ECHELLE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010007959
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La modélisation intégrée d'un écosystème inondable : le cas du delta intérieur du Niger IRD
Kuper, M.; Mullon, Christian; Poncet, Yveline; Benga, E.; Morand, Pierre; Orange, Didier; Mahé, Gil; Arfi, Robert; Bamba, F..
Tipo: Text Palavras-chave: PLAINE INONDABLE; MODELISATION; ANALYSE SPATIALE; EXPLOITATION DES RESSOURCES NATURELLES; FONCTIONNEMENT DE L'ECOSYSTEME; RECHERCHE PLURIDISCIPLINAIRE; DEVELOPPEMENT INTEGRE; LOGICIEL; AMENAGEMENT DES EAUX; BARRAGE; RESSOURCES HALIEUTIQUES; SYSTEME DE PRODUCTION; PRODUCTION HALIEUTIQUE; PRODUCTION AGRICOLE; ELEVAGE; AGROPASTORALISME.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010030399
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Les changements d'échelles en halieutique : l'exemple des petits pélagiques côtiers IRD
Fréon, Pierre; Gerlotto, François; Mullon, Christian.
Tipo: Text Palavras-chave: RESSOURCES HALIEUTIQUES; GEOSTATISTIQUE; ECHOINTEGRATION; VARIATION SPATIALE; VARIATION TEMPORELLE; ESPECE PELAGIQUE; PECHE COTIERE; TAXONOMIE; TRANSFERT D'ECHELLE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:31965
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PRAO : un système d'information géographique : outil de "Planification Régionale Assistée par Ordinateur" IRD
Boursier, P.; Mullon, Christian; Pelletier, Françoise; Souris, Marc; Treuil, Jean-Pierre.
Tipo: Text Palavras-chave: SYSTEME D'INFORMATION GEOGRAPHIQUE; SGBD; MICROORDINATEUR; CONCEPTION ASSISTEE PAR ORDINATEUR; ORDINATEUR; LOGICIEL; CARTE THEMATIQUE; PLANIFICATION REGIONALE; AMENAGEMENT DU TERRITOIRE; PRAO.PLANIFICATION REGIONALE ASSISTEE PAR ORDINATEUR.
Ano: 1985 URL: http://www.documentation.ird.fr/hor/fdi:010021182
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Problèmes statistiques de la très grande variabilité IRD
Mullon, Christian; Pichon, Gaston.
L'analyse expérimentale des phénomènes présentant une très grande variabilité semble correspondre à une limitation de l'usage des lois des grands nombres. Nous examinons comment cette constatation expérimentale s'explique naturellement lorsque les phénomènes étudiés suivent des lois de Pareto. Nous indiquons ensuite quelles raisons nous conduisent à envisager que ces lois de Pareto ne sont pas exceptionnelles et correspondent en fait à des situations hiérarchisées rencontrées assez souvent dans l'analyse des phénomènes complexes, notamment à l'occasion de modélisations fractales. Dans ce sens, cet exposé qui ne contient pas des résultats originaux peut être considéré comme une introduction à la partie statistique de la théorie de Mandelbrot. (Résumé...
Tipo: Text Palavras-chave: STATISTIQUE; VARIABILITE; THEORIE; TRANSFERT D'ECHELLE; FRACTAL; LOI DES GRANDS NOMBRES.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:31953
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Prototype of an integrated model of the worldwide system of small pelagic fisheries IRD
Mullon, Christian; Fréon, Pierre.
Tipo: Text Palavras-chave: PECHE MARITIME; ESPECE PELAGIQUE; CAPTURE; ECONOMIE DES PECHES; MODELE; TRAITEMENT DE DONNEES; SYSTEME EXPERT; SIMULATION; AMENAGEMENT DES PECHES; CHANGEMENT SOCIAL; INNOVATION.
Ano: 2006 URL: http://www.documentation.ird.fr/hor/fdi:010046905
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Quelques questions et propositions sur le montage des observatoires environnementaux IRD
Mullon, Christian; Garcia, S..
Tipo: Text Palavras-chave: GESTION DE L'ENVIRONNEMENT; POLITIQUE DE L'ENVIRONNEMENT; INFORMATION; COMMUNICATION; OBSERVATOIRE; TRAITEMENT DE L'INFORMATION; RECOMMANDATION.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010030406
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Régressions de variables qualitatives, analyse des correspondances et réseaux neuronaux IRD
Mullon, Christian; Bochereau, L.; Palagos, B.; Pichon, Gaston.
Tipo: Text Palavras-chave: STATISTIQUE; ANALYSE FACTORIELLE; ANALYSE QUALITATIVE; ANALYSE DE REGRESSION; ANALYSE DISCRIMINANTE; ANALYSE DE CORRESPONDANCE; MODELISATION; ETUDE COMPARATIVE; RESEAU DE NEURONE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:36019
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Rhétorique de la modélisation IRD
Mullon, Christian.
Tipo: Text Palavras-chave: MODELISATION; THEORIE; METHODOLOGIE; EPISTEMOLOGIE.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:27047
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Simulating fishermen society IRD
Bousquet, François; Cambier, Christophe; Mullon, Christian; Quensière, Jacques.
Tipo: Text Palavras-chave: SIMULATION; PECHE; INTELLIGENCE ARTIFICIELLE; SOCIETE TRADITIONNELLE; PECHEUR; RESSOURCES HALIEUTIQUES; INTELLIGENCE ARTIFICIELLE DISTRIBUEE; DECISION.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:35494
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Simulating the interaction between a society and a renewable resource IRD
Bousquet, François; Cambier, Christophe; Mullon, Christian; Morand, Pierre; Quensière, Jacques; Pavé, A..
... In this paper we present the simulator, and, in order to give a general outline of its use we present different experimentations. The architecture of simulators is based on Distributed Artificial Intelligence principle (multi-agents simulations, object oriented language). We simulate an aquatic ecosystem submitted to an increase of the fishing effort and compare the effect of different representation of fishing effort. As a result of the simulations, focus can be put on the relation between space sharing rules and the evolution of the ecological equilibrium. The simulator is considered as a discussion tool to lead to interdisciplinary meetings. (D'après résumé d'auteur)
Tipo: Text Palavras-chave: MILIEU AQUATIQUE; ECOSYSTEME; SIMULATION; ETUDE DE CAS; PECHEUR; EFFORT DE PECHE; ANALYSE DE DONNEES; RECHERCHE PLURIDISCIPLINAIRE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:39801
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Simulation du comportement hydrique du sol : d'un milieu poreux continu à une structure fractale IRD
Perrier, Edith; Mullon, Christian.
Deux logiciels de simulation des écoulements de l'eau dans le sol sont présentés. Le premier est basé sur la résolution numérique d'une équation différentielle connue, régissant les transferts hydriques dans un milieu poreux continu. Le second permet de réaliser des "expériences numériques" sur des questions encore ouvertes, à savoir l'influence des propriétés morphologiques et structurales du sol sur son comportement hydrique : le sol est modélisé comme un ensemble d'agrégats et de pores organisés en une structure fractale ; de la simulation de règles élémentaires de comportement sur un grand nombre d'objets au niveau microscopique émergent des propriétés globales. A comparer avec l'expérience en laboratoire. Ces deux aspects de l'informatique...
Tipo: Text Palavras-chave: SIMULATION; HYDRODYNAMIQUE; STRUCTURE DU SOL; POROSITE; PROFIL HYDRIQUE; FRACTAL; INTERFACE GRAPHIQUE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:35475
Registros recuperados: 25
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