Relevant bibliographies by topics / Configuration geometrique

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Configuration geometrique'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Configuration geometrique"

1

Tóth, M., G. Szőcs, W. Francke, F. Schmidt, P. Philipp, C. Löfstedt, B. S. Hansson, and A. I. Farag. "Pheromonal Production of and Response to Optically Active Epoxydienes in Some Geometrid Moths (Lepidoptera: Geometridae)." Zeitschrift für Naturforschung C 49, no. 7-8 (August 1, 1994): 516–21. http://dx.doi.org/10.1515/znc-1994-7-819.

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In pheromone extracts of calling female Chiasma clathrata L. (Lepidoptera: Geometridae), a defoliator pest of alfalfa, (Z,Z,Z)-3,6,9-heptadecatriene and (Z,Z)-6,9-cis-3,4-epoxyheptadecadiene was identified. Chiral gas chromatography using a modified cyclodextrin and synthetic reference samples proved the natural epoxide to show (3R, 4S)-configuration. In field trapping tests, only the pure (3R, 4S)-enantiom er of the epoxide attracted males. The addition of the triene component was synergistic. Males of the sympatric species Tephrina arenacearia Hbn. (Lepidoptera: Geometridae) were caught only in traps with baits containing the (3S, 4R)-enantiomer [together with a previously described minor component, (Z,Z)-3,9-cis- 6,7-epoxyheptadecadiene]. In trapping tests conducted in a different biotope, Abraxas grossulariata L. (Lepidoptera: Geometridae) males were attracted by the (3S, 4R)-enantiomer, whereas the (3R, 4S)-enantiomer attracted a close relative, Abraxas sylvata Scop. (Lepidoptera: Geometridae). The present results suggest that one of the key mechanisms responsible for pheromone specificity among both the two alfalfa geometrids and the two A braxas species in their respective biotops, may be the use of different enantiomers of the same polyenederived epoxide as a sex pheromone component. It is probable that this discrimination mechanism is widespread among moth species utilizing epoxide pheromone components
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2

Forster, Louise C., Gregory K. Pierens, and Mary J. Garson. "Elucidation of Relative and Absolute Configurations of Highly Rearranged Diterpenoids and Evidence for a Putative Biosynthetic Intermediate from the Australian Nudibranch Goniobranchus geometricus." Journal of Natural Products 82, no. 3 (November 12, 2018): 449–55. http://dx.doi.org/10.1021/acs.jnatprod.8b00713.

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Dissertations / Theses on the topic "Configuration geometrique"

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Gasti, Wahida. "Etude et realisation d'un processeur rapide de transformations geometriques d'images numeriques." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13131.

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Les transformations geometriques d'images sont essentiellement utilisees pour: corriger les erreurs de parallaxe dues aux conditions de prise de vues, comparer des images provenant de capteurs differents, superposer des images reelles et des images conceptuelles, realiser des effets speciaux
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Zein, Waël. "Etude d'un capteur absorbant l'energie solaire par le fluide caloporteur : application au chauffage des piscines de plein-air." Poitiers, 1986. http://www.theses.fr/1986POIT2289.

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Modelisation des transferts radiatifs pour les differents composants du capteur. Resolution numerique des equations permettant d'obtenir les lois d'evolution des performances du capteur en fonction de ces caracteristiques geometriques, des conditions radiatives et meteorologiques d'un site. Verification experimentale a l'aide d'un simulateur de rayonnement. Application envisagee, au chauffage d'une piscine en plein-air. Optimisation des conditions de fonctionnement et analyse economique du systeme de chauffage
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3

Amarouche, Mohand. "Modelisation des agregats de gaz rares et dynamique d'ar : :(3)**(+)." Toulouse 3, 1988. http://www.theses.fr/1988TOU30135.

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Calcul de la structure d'equilibre et de l'energie d'agregats ioniques positifs de xe et ar a l'aide d'un hamiltonien de type excitonique, extrait des courbes de potentiel des diatomiques correspondants, en incluant le couplage spin-orbite et les interactions a 3 corps entre dipoles induits instantanement. Emploi de ce modele pour calculer les barrieres de potentiel entre divers isomeres, les diverses possibilites de fragmentation apres photoionisation verticale et les echanges de masse lors de collisions entre agregats; observation d'une stabilite remarquable des agregats a 13 et 19 atomes, formes de couronnes pleines autour de coeurs ionises a 3 ou 4 atomes. Couplage du modele excitonique a la methode de dynamique "hemiquantique" pour etudier la photodissociation de ar::(3)**(+), dont on calcule la section efficace a partir du moment de transition de l'espece diatomique obtenu par des calculs ab initio
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4

BELLOSTA, DECHAVANNE VERONIQUE. "Contribution a l'etude de la reactivite de derives glucidiques vis-a-vis d'organometalliques : nouvelles syntheses stereospecifiques de c-glycosides." Paris 6, 1987. http://www.theses.fr/1987PA066256.

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Deux nouvelles methodes de syntheses stereospecifiques de desoxy-2 c-glucosides possedant une fonction ester d'enol sont presentees : - l'addition conjuguee d'organocuprates cyanes sur des hexeno-1 pyrannuloses-3 peracetyles (l'anhydride acetique piegeant l'enolate intermediaire) permet d'obtenir des aryl-alpha -d-c-glycosides. Cette methode est detendue avec succes en serie furannose; - l'arylation de glycals catalysee par des sels de palladium fournit les composes voulus en une seule etape a partir de derives glucidiques commerciaux. L'etude de la configuration des c-glycosides obtenus est effectuee et de nombreuses donnees structurales sont exposees
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5

Mrkvička, Tomáš. "Zobrazování komplexních 3D scén." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235446.

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This thesis deals with representation of large and complex 3D scenes which are usually used by modern computer games. Main aim is design and implementation of data driven rendering system. Proper rendering is directed (driven) by scene description. This description is also designed with respect to scene creators whose typically do not have deep knowledge of programming languages in contrast to game programming developers. First part is focused on design of efficient scene description and its possible applications at scene rendering. Second part is focused on proper system implementation. Finally, consequently important system optimizations are mentioned too.
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