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Exploitation d'images tomographiques RX pour l'analyse de la structure interne des gourmands de chêne. Procédure d'utilisation du plugin "Gourmands" avec ImageJ Inra
Freyburger, C.; Mothe, F.; Colin, F.; Fontaine.
Cette note explique le fonctionnement du plugin Gourmand, créé par Frédéric Mothe. Utilisé avec le logiciel ImageJ, il permet d'exploiter des images tomographiques RX de billons de Chênes, pour connaitre la structure interne des gourmands. Il permet ainsi de positionner ces gourmands, mais aussi les branches, bourgeons ou picots du billon de chêne dans le but d'en obtenir une image 3D grâce à un second logiciel, Bil3D.
Tipo: Report Palavras-chave: IMAGE TOMOGRAPHIQUE; RADIOGRAPHIE; RAYON X; ANALYSE D'IMAGE; STRUCTURE; POSITION; GOURMAND; BRANCHE; BOURGEON; BILLON; LOGICIEL; IMAGEJ.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007a97d71bb&uri=/notices/prodinra1/2008/01/
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Les chaînes réactionnelles qui provoquent et maintiennent les contacts trophallactiques chez les guêpes sociales National Institute of Agronomic Research
Montagner, Hubert.
Les contacts trophallactiques qui apparaissent comme un des fondements de la vie sociale chez les insectes ont toujours préoccupé les biologistes. Mais on ne sait toujours pas comment se déroulent les échanges de nourriture et quels sont les rôles exacts joués par les pièces buccales et les différents éléments sensoriels mis en jeu. Nous avons entrepris d'éclaircir ces aspects constants et fondamentaux de la vie sociale chez les guêpes du genre Vespa. Pour cela, nous avons filmé systématiquement, en vitesse accélérée, de nombreuses séquences trophallactiques en fonction de l'âge, de la dominance et de la caste des partenaires. L'analyse des films a été faite image par image.
Tipo: Journal Article-postprint Palavras-chave: WASP; SOCIAL INSECT; VESPA; TROPHALLAXIS; BEHAVIOUR; POSITION; MOUTHPART; GUEPE; VESPA; INSECTE SOCIAL; TROPHALLAXIE; COMPORTEMENT; POSTURE; PIECE BUCCALE.
Ano: 1964 URL: http://hdl.handle.net/2174/375
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Positional concerns in public goods games Inra
Bougherara, D.; Costa, S.. (Présentateur); Grolleau, G.; Ibanez, L.; ESA, Economic Science Association (INT).
When asked to pick which of the two states of the world they would prefer to live in (A: Your current early income is $55,000; others earn $25,000 or B: Your current early income is $100,000; others earn $200,000 ) 56% of respondents preferred a world in which they had half the real purchasing power, as long as their relative income position was high (Solnick and Hemenway, 1998). In other words, some people care for their relative position. Although such motivations for purchase have been identified early (e.g., Veblen, 1899; Hirsch, 1976; Frank, 1985; Alpizar et al., 2005), theoretical and empirical investigations about their importance in relation to public goods remain scarce (e.g., Solnick and Hemenway, 2005). We propose an economic model and an...
Tipo: Meeting Paper Palavras-chave: PUBLIC GOOD; POSITION; CONSUMER BEHAVIOR; EXPERIMENT.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20104e5c03e9&uri=/notices/prodinra1/2010/03/
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Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations Inra
Piboule, A.; Collet, C.; Frochot, H.; Dhôte, J.F..
Tipo: Journal Article Palavras-chave: POSITION; COMPETITION DES HOUPPIERS; RECONSTRUCTION DES HOUPPIERS; MODELE DE LUMIERE; HOUPPIER; DIAMETRE; PEUPLEMENT FORESTIER.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9500029479110657&uri=/notices/prodinra1/2009/11/
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The effects of position on hatching of honey bee eggs in the laboratory National Institute of Agronomic Research
Dietz, Alfred.
Studies were made to determine the incidence of hatching of honey bee, Apis mellifera L., eggs incubated in various positions. Petri dishes with basal layers of wax, paraffin, or drone foundation were used as supporting surfaces for eggs. The lowest successful hatching incidence was 58% for eggs kept in the inverted position; the highest incidence was 67% in an ordinary prone position. The averagc hatching incidence of 62% shows that hatching is not influenced strongly by the position of the egg. Eggs placed into petri dishes but without regard to their position showed an average of 78% hatchability. The resulting larvae, reared artificially on larval food, showed normal growth and development. Excessivc shaking or bumping does not appear to affect...
Tipo: Journal Article-postprint Palavras-chave: HONEYBEE; EGG; ABEILLE; APIDAE; APIS MELLIFERA; OEUF; ECLOSION; ETUDE EN LABORATOIRE; MANIPULATION; POSITION.
Ano: 1964 URL: http://hdl.handle.net/2174/512
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