Relevant bibliographies by topics / Groupe des lacets

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Academic literature on the topic 'Groupe des lacets'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Groupe des lacets"

1

Fang, Shizan, and Jinghai Shao. "Distance riemannienne, théorème de Rademacher et inégalité de transport sur le groupe des lacets." Comptes Rendus Mathematique 341, no. 7 (2005): 445–50. http://dx.doi.org/10.1016/j.crma.2005.08.004.

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Baudoin, Fabrice. "Équations différentielles stochastiques conduites par des lacets dans les groupes de Carnot." Comptes Rendus Mathematique 338, no. 9 (2004): 719–22. http://dx.doi.org/10.1016/j.crma.2004.02.016.

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Kaltcheva, Nadia T. "The field of Lacerta OB1." Proceedings of the International Astronomical Union 5, S266 (2009): 427–28. http://dx.doi.org/10.1017/s1743921309991608.

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AbstractWe present a new analysis of the Galactic structure in the field of Lacerta. The investigation uses precise uvbyβ photometry and the recalculated Hipparcos parallaxes to provide an improved homogeneous distance scale to the main stellar groups in the field. The OB association Lac OB1 (Lac OB1b) is reliably identified as a very compact young group at an average distance of 520 ± 80 pc. The characteristics of the older Lac OB1a group and the open cluster NGC 7243 are extensively studied based on photometric diagrams and the inferred distances. A good agreement between the photometry-derived distances and the recalculated Hipparcos parallaxes is found for the Lac OB1 group, but in general discrepancies still exist for this particular field.
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Kalilu, Razaq Olatunde Rom, and Adeola Abiodun Adeoti. "Morphological categorization and typological classification of lace fabrics in Nigeria." Clothing Cultures 6, no. 3 (2020): 351–63. http://dx.doi.org/10.1386/cc_00022_1.

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This article presents a study of lace textiles used for clothing in southern Nigeria. The study was conducted with the aim of providing a preliminary morphological categorization and typological classification of the lace textiles. Based on field research conducted in six strategically selected cities of southern Nigeria, the study used a total of 135 lace textile samples available in the region from 1990 and 2016 for its analyses. The study categorized the lace textiles into two morphological classes of handmade lace and machine-made lace. It also classified the machine-made lace into eleven typological groups based on the visual qualities of the laces.
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Bazzichelli, Giorgio, and Nadia Abdelahad. "Morphometric and statistic characterization of two Aphanizomenon populations of the group Aphanizomenon ovalisporum Forti from the lakes of Nemi and Albano (Italy)." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 73 (July 7, 1994): 1–21. http://dx.doi.org/10.1127/algol_stud/73/1994/1.

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Saint Girons, H., F. J. Bradshaw, and S. D. Bradshaw. "Seasonal changes in material and energy balance associated with reproduction in the green lizard, Lacerta viridis, in western France." Amphibia-Reptilia 12, no. 1 (1991): 21–32. http://dx.doi.org/10.1163/156853891x00293.

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AbstractRates of turnover of oxygen, water and sodium were measured in free-ranging and captive Lacerta viridis in western France during their period of reproduction in May, and again in late autumn prior to their entering winter hibernation. Rates of C02 production and turnover of water and sodium in captive lizards showed little significant variation and these animals appeared to be buffered to a large extent from environmental changes, even though they were exposed to external climatic influences. Overall means for rates of CO2 production in free-ranging individuals did not vary statistically between seasons but considerable individual variation was observed during the breeding season in May. The animals could be divided into 'active' and 'inactive' groups on the basis of their rate of CO2 production and other significant differences were apparent between these two groups: 'active' individuals had increased rates of sodium turnover, lower body water contents and lost body mass during the period of observation whereas the 'inactive' individuals gained mass over the same period. These data suggest that not all individuals necessarily participate in the activity associated with breeding in spring in this species and further behavioural studies would seem appropriate in the light of these physiological data. Calculation of the 'Water Effectiveness Index' for this species from the ratio of water to energy turnover suggests that Lacerta viridis is a profligate utiliser of available resources when compared with similar-sized species of lizards inhabiting desert environments.
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Alegre, Joaquín, José María Salgado, and Angel Hernández. "Ecología trófica de Lacerta lepida en la provincia de León, noroeste de España." Amphibia-Reptilia 12, no. 3 (1991): 283–92. http://dx.doi.org/10.1163/156853891x00446.

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AbstractThe diet of Lacerta lepida in the province of León (NW Spain) was studied through the analysis of 286 faecal pellets collected during May-August. Insecta were the numerically most important prey group, and always represented more than 85 % of prey numbers. Coleoptera and Hymenoptera were the dominant orders. Other important prey groups were Heteroptera and Arachnida. The number of Orthoptera consumed increased gradually from May to August. With respect to the occurrence frequency of prey in the faecal pellets, Coleoptera and Hymenoptera occurred in more than 75% at all times. The lowest trophic diversity was detected in june-july. Seasonal changes in the diet were noteworthy within short-terms and augmented in the long-term. The average length of the invertebrate prey was within the interval 9-14 mm. In terms of energy content, Vertebrata (43.82%), Coleoptera (15.77%), Orthoptera (14.40%) and Hymenoptera (13.95%) were the principal groups. L. lepida is considered to be an opportunistic feeder, although some prey groups are apparently selected.
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Kovács, Dániel, and István Kiss. "Microhabitat use of different age groups of snake-eyed skink and Eastern green lizard." Amphibia-Reptilia 37, no. 2 (2016): 191–98. http://dx.doi.org/10.1163/15685381-00003039.

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Although Ablepharus kitaibelii and its subspecies are wide-spread, being distributed from the Carpathian Basin through the Balkans to Iraq, their habitat and environmental niche is poorly known. Ablepharus kitaibelii fitzingeri is almost entirely limited to the Carpathian Basin, and is amongst the most strictly protected and least known reptiles of Central and Eastern Europe. The main aim of our study was to determine habitat use preferences of different age groups of A. kitaibelii fitzingeri and Lacerta viridis. The occurrence of green lizard was determined by the abundance of refugia rather than by the naturalness of grasslands. The snake-eyed skink prefers semi-natural grasslands with abundant tussock-forming grass or sedge species, avoiding densely shrubby places. For the first time, we show that woodland mosaics lacking shrubs and temporary grasslands next to forest edges are important for the species. Microhabitat use by snake-eyed skink varies with age group; adults preferring shady edge zones rich in leaf litter and shadier grassland spots provided by woodland mosaics, whereas juveniles were found in natural, more open grasslands far from forest edges and in woodland mosaics with dense shrubby understory. Our results contribute to a better understanding of the ecological needs of A. kitaibelii fitzingeri. Our methodology could be adapted to other species and subspecies of Ablepharus. Based on our results, it is important to reconsider habitat management activities, which should not be limited to shrub control: the main goal should be the development of a diverse habitat structure.
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Pérez-Mellado, Valentin, Dirk Bauwens, Martin Gil, Fátima Guerrero, Miguel Lizana, and Maria-José Ciudad. "Diet composition and prey selection in the lizard Lacerta monticola." Canadian Journal of Zoology 69, no. 7 (1991): 1728–35. http://dx.doi.org/10.1139/z91-241.

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We studied diet composition and prey selection in the lizard Lacerta monticola throughout its activity season. The most important prey groups in terms of numbers were Coleoptera, Diptera, Formicidae, and Araneae. Comparison of diet composition in the adult lizards with estimates of prey availability indicated that lizards exhibited precisely defined patterns of prey selection. Electivities were negative for prey < 3 mm in length and generally positive for larger prey, despite the higher relative abundance of the former group in the environment. Electivity scores for individual prey taxa were positively correlated with their length, and lizards preferentially consumed larger individuals belonging to the taxa containing smaller animals. Relative availability of the four major prey taxa fluctuated considerably throughout the year. In spite of these changes, monthly rates of consumption of Araneae and Diptera remained almost constant. Variations in monthly electivity scores were negatively correlated with relative availability of three (Coleoptera, Diptera, and Araneae) of the four major prey taxa. These results fit the predictions of prey-selection models based on nutrient constraints.
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DUBOIS, ALAIN, and ROGER BOUR. "The nomenclatural status of the nomina of amphibians and reptiles created by Garsault (1764), with a parsimonious solution to an old nomenclatural problem regarding the genus Bufo (Amphibia, Anura), comments on the taxonomy of this genus, and comments on some nomina created by Laurenti (1768)." Zootaxa 2447, no. 1 (2010): 1. http://dx.doi.org/10.11646/zootaxa.2447.1.1.

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The nomenclatural consequences of the recent rediscovery of the works of Garsault (1764, 1765, 1767) in amphibians and reptiles are examined in detail. The 13 new nomina of these two groups created by Garsault (1764) distribute in three categories: (1) three of these nomina (Lacertus, Rana viridis, Testudo marina) cause no problem, being just junior synonyms of senior nomina created by Linnaeus (1758); (2) four of them (Bufo, Salamandra, Scincus, Vipera) become the valid nomina of taxa, in replacement of identical nomina created later by Laurenti (1768), thus entailing no change in the nomina of their included species and subspecies but changes in their complete nominal-complexes (including their authors and dates); (3) six of these nomina are here rejected as invalid senior synonyms (Ranetta, Serpens, Lacertus aquatilis, Lacertus terrestris) or homonyms (Lacertus viridis, Testudo terrestris) of nomina in current use, by virtue of Article 23.9.1 of the Code. A very positive result of the rediscovery of these works is that it allows to solve for the best an old nomenclatural problem, concerning the nucleospecies (type-species) of the genus Bufo: whereas the nucleospecies (type-species) of Bufo Laurenti, 1768 is Bufo viridis Laurenti, 1768, we hereby designate Rana bufo Linnaeus, 1758 as nucleospecies of Bufo Garsault, 1764. This case shows that it is sometimes possible, even in complex nomenclatural situations, to solve them through a proper use of the Rules of the Code, without having to appeal to the ICZN for the use of its Plenary-Powers. From a taxonomic point of view, we think the data published so far do not allow currently to stabilise the generic taxonomy of the BUFONIDAE. Pending additional data, we support a conservative attitude, maintaining in the genus Bufo most species traditionally referred to this genus. In particular, we think all Eurasian species of this family, which include several pairs of species known to be able to produce viable adult hybrids, should be kept in this genus, but in three distinct subgenera: Bufo Garsault, 1764 for the group including Bufo bufo (Linnaeus, 1758); Bufotes Rafinesque, 1815 for the group including Bufo viridis (Laurenti, 1768); and Epidalea Cope, 1864 for the group including Bufo calamita (Laurenti, 1768). This survey also allows to discuss the appropriateness of the current Article 11.9.5 dealing with specific trinomina, especially as they appear in Laurenti (1768), and to point again to the need to implement more drastic Rules regarding the conditions required for a nomen being compliant for protection through Article 23.9.1 of the Code.
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Dissertations / Theses on the topic "Groupe des lacets"

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Magnot, Jean-Pierre. "Sur la géométrie d'espaces de lacets." Clermont-Ferrand 2, 2002. http://www.theses.fr/2002CLF21365.

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Après avoir rappelé certains résultats sur les fibrés principaux en dimension infinie, nous prouvons dans un cadre qui se veut le plus général possible : -un résultat de type Théorème d'Ambrose-Singer dans le cadre des fibrés principaux ILH (Inverse Limit of Hilbert), cadre introduit par Omori pour traiter de problèmes de type fonctions implicites dans le cadre Fréchetique ; -un théorème de type Chern-Weil généralisant la construction des formes de Chern à la dimension infinie par l'utilisation d'une fonctionnelle linéaire fixée. En vue de l'application de ces résultats aux espaces de lacets, nous introduisons les fibrés de repères ayant pour groupes de structure des groupes d'opérateurs pseudo-différentiels classiques (OPD). Sur certains de ceux-ci, nous pouvons appliquer le théorème d'Ambrose-Singer. Nous étudions aussi l'application possible du théorème de Chern-Weil à ces fibrés principaux, en prenant tour à tour comme fonctionnelle linéaire le résidu de Wodzicki et la trace pondérée d'un OPD. Ceci nous conduit à une réinterprétation en termes de traces pondérées du résultat de D. Freed affirmant que le groupe des lacets pointés est Kähler-Einstein
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DELABRE, DANIEL. "$$k2c is infty(s1) et l'extension centrale de segal du groupe des lacets de slc." Toulouse 3, 1998. http://www.theses.fr/1998TOU30137.

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Nous construisons des classes de chern a la beilinson-deligne pour des varietes differentiables lisses ci, j : ki cisinfty(x) isto hd2j-i (x, z(j)) a valeurs dans la cohomologie lisse de deligne, le complexe de deligne lisse etant le meme que son analogue analytique, pour les formes cisinfty. Les proprietes algebriques de ces classes (comportement vis a vis de la multiplication, de la lambda structure et des operations d'adams) proviennent de relations purement algebriques entre les fibres universels, et sont par consequent les memes que celles des classes analogues construites en geometrie algebrique. Nous montrons egalement que c1, 1 est le determinant, d'ou resulte que c2, 2 d'un symbole de steinberg s'exprime comme image inverse du fibre de heisenberg muni de sa connexion. Dans une seconde partie, nous specialisons notre etude a c2, 2. Nous montrons que, pour des varietes compactes, il est possible de deformer infinitesimalement c2, 2 ; cette deformation permet de definir, en utilisant certains resultats de s. Bloch, une extension centrale d'algebres de lie dont un cocycle est y , z ismapsto tr ydz. Pour x = s1, on reconnait la le cocycle de segal. Cela montre que c2, 2s'identifie infinitesimalement au deuxieme regulateur de connes-karoubi c2 ck : $$k2 c isinfty(s1) is to c istimes
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Shao, Jinghai. "Inégalité du coût de transport et le problème de Monge-Kantorovich sur le groupe des lacets et l'espace des chemins." Dijon, 2006. http://www.theses.fr/2006DIJOS020.

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Nous nous intéressons principalement à l'inégalité du coût de transport (ICT) et au problème de Monge-Kantorovich sur PeG l'espace des chemins et le groupe des lacets LeG. Nous établissions ICT pour la H-distance sur PeG et pour la distance uniforme sur LeG. Dans un espace polonais, on definit un semi-groupe et montre qu'il satisfait à l'inégalité de Hamilton-Jacobi sous quelques conditions convenables. Ce résultat nous permet d'établir ICT sur LeG pour la “distance riemannienne”. Enfin, nous montrons qu'il existe uniquement une application optimale T de LeG dans LeG qui pousse la mesure de la chaleur ν en avant vers F ν, où F est une densité telle que l'entropie Ent ν (F) est finie<br>We mainly consider to establish the transportation cost inequality (TCI ) and to solve the Monge-Kantorovich problem on path space PeG and loop group LeG. An H-distance is defined on PeG and enables us to establish TCI on PeG and generalize this method to the path space over LeG to obtain TCI w. R. T. Uniform distance on LeG. In a Polish space, we define a semigroup and prove it satisfies Hamilton-Jacobi inequality under suitable conditions, then we apply it to establish TCI w. R. T. “Riemannian distance” on LeG. At last, we prove there exists a unique optimal map T from LeG to LeG which pushes heat kernel measure ν forward to F ν , where F is a density such that the entropy Ent ν (F) is finite
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Berger, Clemens. "Une version effective du théorème de Hurewicz." Phd thesis, Grenoble 1, 1991. http://tel.archives-ouvertes.fr/tel-00339314.

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Daniel Kan associe a tout ensemble simplicial réduit x un fibre principal contractile de base x et de fibre un groupe simplicial libre, note gx. Un concept généralisé de prisme nous permet de considérer ce groupe comme sous-quotient canonique d'un modèle simplicial de l'espace de lacets de x, et de munir l'espace total du fibre d'une contraction combinatoire évoquant l'idée topologique de contraction des chemins. Est ainsi établie une correspondance biunivoque explicite entre les représentants algébriques des classes d'homotopie de Gx et certains représentants géométriques des classes d'homotopie de x. En utilisant les propriétés homotopiques du commutant de Gx nous obtenons enfin une version effective du théorème de Hurewicz comportant entre autres la construction algorithmique de sphères combinatoires a partir de certains cycles homologique
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Hernandez, David. "Autour des représentations des algèbres quantiques : géométrie, dualité de Langlands et catégorification des algèbres cluster." Habilitation à diriger des recherches, Université Paris-Diderot - Paris VII, 2009. http://tel.archives-ouvertes.fr/tel-00406516.

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Nous présentons des résultats obtenus dans cinq directions autour des représentations des algèbres affines quantiques $\U_q(\hat{\Glie})$. En premier lieu nous prouvons la conjecture de Kirillov-Reshetikhin, c'est-à-dire des formules de caractères pour certaines représentations de dimension finie de $\U_q(\hat{\Glie})$, et nous étendons le résultat à des affinisations minimales; nous étendons le modèle monomial des cristaux aux représentations extrémales et nous y interprétons des automorphismes de Kashiwara. Ensuite, à l'interface avec la géométrie algébrique, nous définissons une notion de groupes de lacets analytiques avec une factorisation de Riemann-Hilbert qui permet de réaliser géométriquement le centre de $\U_q(\hat{\Glie})$ aux racines de $1$. Comme application, nous paramétrisons des classes d'équivalences de représentations de $\U_q(\hat{\Glie})$ par des $G$-fibrés sur une courbe elliptique. On résoud le problème de petitesse géométrique posé par Nakajima pour des résolutions de variétés carquois. Troisièmement, nous établissons une nouvelle dualité de Langlands pour des représentations de $\Glie$ et de $\U_q(\hat{\Glie})$ et nous définissons des groupes quantiques d'interpolation pour l'interpréter. Quatrièmement, nous construisons une catégorie tensorielle pour les algèbres affinisées quantiques et des représentations de dimension finie d'algèbres toroïdales quantiques (et de Cherednik); nous proposons un analogue en théorie de Lie des algèbres de réflexion symplectiques. Enfin, nous obtenons des catégorifications monoïdales d'algèbres cluster en terme d'une catégorie $\mathcal{C}_1$ de représentations de $\U_q(\hat{\Glie})$. Pour ce faire, nous établissons notamment la factorisation en modules premiers de modules simples de $\mathcal{C}_1$.
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Pouchin, Guillaume. "Algèbres de Higgs de courbes et cristaux de lacets." Paris 6, 2010. http://www.theses.fr/2010PA066588.

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Cette thèse se situe dans le domaine de la théorie géométrique des représentations. Elle se présente en deux parties. La première partie a pour sujet une nouvelle forme de dualité de Schur-Weyl. Cette dualité, sous sa forme la plus simple, met en relation les représentations d'un groupe symétrique avec celle d'un groupe général linéaire. Il en existe d'autres versions, notamment entre les représentations d'une algèbre de Hecke et celles d'un groupe quantique affine. Celle-ci peut être réalisée sous forme d'algèbres de convolution en terme de fonctions sur des variétés drapeaux agissant sur un certain espace. Nous mettons en valeur une nouvelle forme de dualité entre certaines algèbre dites W, et des algèbres de Schur cyclotomiques, en utilisant cette forme géométrique. La deuxième partie porte sur une réalisation d'algèbres de Lie de lacets de façon géométrique. On utilise un certain espace de modules (l'espace des fibrés de Higgs sur la droite projective), ainsi que l'ensemble des fonctions localement constructibles sur un sous-espace lagrangien. Une multiplication naturelle est définie pour ces fontions, et l'agèbre obtenue est identifiée à une partie positive d'une algèbre de Lie de lacets. Cette construction est ensuite utilisée pour produire une base particulière de cette algèbre, indexée par les composantes irréductibles du support, analogue aux bases canoniques pour les groupes quantiques. Une construction géométrique d'un nouvel objet est ensuite donnée (analogue à la construction géométrique de cristaux dans le cas des carquois). On appelle cet objet combinatoire un cristal de lacets, et nous étudions ses premières propriétés, ainsi que ses applications au niveau de la théorie des représentations.
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SEMLALI, ABDEHAY Roux A. "GRASSMANNIENNES DE DIMENSION INFINIE, GROUPES DE LACETS ET OPERATEUR VERTEX /." [S.l.] : [s.n.], 1996. ftp://ftp.scd.univ-metz.fr/pub/Theses/1996/Semlali.Abdelhay.SMZ9646.pdf.

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Semlali, Abdelhay. "Grassmanniennes de dimension infinie, groupes de lacets et opérateur vertex." Metz, 1996. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1996/Semlali.Abdelhay.SMZ9646.pdf.

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Dans la première partie de ce travail, on a étudié les grassmanniennes d'un espace de Hilbert séparable, de dimension infinie, plus exactement le lien de la grassmannienne régulière (hilbertienne) à ses composantes connexes, au groupe général linéaire restreint, et aux ouverts de l'atlas associés à sa structure hilbertienne. On a étudié aussi les composantes connexes d'une grassmannienne dense dans la grassmannienne régulière, le lien de ses composantes connexes à sa décomposition en cellules de Schubert. A la fin de cette partie, on démontre le lien topologique qui existe entre les grassmanniennes de dimension infinie et les grassmanniennes de dimension finie. Dans la deuxième partie, on a étudié le lien des groupes de lacets aux grassmanniennes, et l'équivalent de l'action de l'opérateur vertex sur les éléments de la grassmannienne associés à la fonction tau<br>In the first part of this work, we studied the infinite dimensional Grassmannians of a separable Hilbert space. More exactly, the link between hilbertian grassmannians and its connected components, the restricted general linear group, and the open sets covering of this hilbertian grassmannian. We studied also the connected components of a dense grassmannian of a hilbertian grassmannian, the link between its connected components and its cellular Schubert decomposition. At the end of this part, we show the topologic relation existing between the infinite dimensional grassmannians and the finite dimensional once. In the second part of this work, we studied the link between the loop groups and the grassmannians, we studied also the operator vertex's action on the grassmannian's elements associated to the tau function
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Charpentier, Éric. "Theories de wess-zumino-witten de niveau un pour les groupes simplement laces." Paris 7, 1990. http://www.theses.fr/1990PA077185.

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Les theories de wess-zumino-witten sont des theories quantiques conformes des champs bidimensionnelles analytiquement resolubles. Elles apparaissent en physique statistique dans l'etude des phenomenes critiques, et dans la theorie des supercordes dont elles decrivent de possibles etats de vide dans le domaine non-supersymetrique. Nous calculons les amplitudes operatorielles de ces theories sur une surface de riemann compacte a bord generale pour des groupes simplement laces et au niveau le plus bas. Les origines des complications dans la construction des operateurs de vertex faite par kac-frenkel et segal sont retrouvees dans le terme topologique de wess-zumino figurant dans l'action classique du modele. La representation par les operateurs de vertex des algebres de kac-moody correspondant a ces theories est generalisee a toutes les surfaces. La relation entre les amplitudes operatorielles et vectorielles est explicitee. Le calcul repose sur l'hypothese que les champs libres qui sortent du sous-groupe de cartan se detruisent mutuellement dans l'integration fonctionnelle. Cette hypothese se traduit par des identites qui sont verifiees formellement mais dont il reste a montrer qu'elles survivent a la regularisation zeta. Enfin, nous fermionisons les amplitudes obtenues
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Daniel, Jérémy. "Variations de structures de Hodge lacées et fibrés harmoniques." Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC175.

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Cette thèse étudie deux problèmes indépendants liés à la théorie de Hodge. Dans le premier chapitre, on introduit une généralisation en dimension infinie des structures de Hodge : les structures de Hodge lacées. La donnée d'une variation de structures de Hodge lacées est équivalente à celle d'un fibré harmonique, permettant l'étude des fibrés harmoniques via les outils classiques de théorie de Hodge, notamment l'existence d'un domaine et d'une application de périodes. Dans le deuxième chapitre, on étudie la possibilité de développer une théorie de formes harmoniques pour le calcul de la cohomologie caractéristique, attachée à une variété différentielle munie d'un système différentiel extérieur. Ceci est motivé par l'exemple des domaines de périodes qui portent un tel système, provenant de la distribution horizontale<br>Two Hodge-theoretic independent problems are discussed in this thesis. In the first chapter, we introduce an object that generalizes a Hodge structure: a loop Hodge structure. We prove that the datum of a variation of loop Hodge structures is equivalent to the datura of a harmonic bundle, so that one can study harmonic bundles using classical tools of Hodge theory, especially the existence of a period map. In the second chapter, we consider the problem of defining harmonic forms computing the characteristic cohomology of a manifold endowed with an exterior differential system. This is motivated by the example of the period domains, where the exterior differential system is induced by the horizontal distribution
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Books on the topic "Groupe des lacets"

1

Graeme, Segal, ed. Loop groups. Clarendon Press, 1986.

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Herrmann, Jungraithmayr, and Tourneux Henry, eds. Etudes tchadiques.: Actes de la XIème Réunion du Groupe d'études tchadiques, LACITO, CNRS, Paris. Geuthner, 1988.

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Laboratoire des langues et civilisations à tradition orale (France). Groupe d'études tchadiques. Réunion. Etudes tchadiques.: Actes de la XIIème réunion du Groupe d'études tchadiques LACITO-CNRS-Paris. Geuthner, 1990.

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4

Schuh, Mari C. The milk group. Pebble Books, 2006.

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Réunion, Laboratoire des langues et civilisations à. tradition orale (France) Groupe d'études tchadiques. Etudes tchadiques: La phrase complexe : actes de la XIIIème Réunion du Groupe d'études tchadiques, LACITO-CNRS, Paris. P. Geuthner, 1991.

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Schuh, Mari C. El grupo de la leche: The milk group / by Mari C. Schuh. Capstone Press, 2006.

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Herrmann, Jungraithmayr, Tourneux Henry, and Laboratoire des langues et civilisations à tradition orale (France). Groupe d'études tchadiques., eds. Études tchadiques: Transitivité et diathèse : actes de la XIème réunion du Groupe d'études tchadiques Lacito-CNRS-Paris. P. Geuthner, 1988.

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Herrmann, Jungraithmayr, Tourneux Henry, and Laboratoire des langues et civilisations à tradition orale (France). Groupe d'études tchadiques., eds. Études tchadiques: Verbes monoradicaux, suivis d'une note sur la negation en haoussa : actes de la XIIème réunion du Groupe d'études tchadiques Lacito-CNRS-Paris. P. Geuthner, 1990.

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Burrows, Jared, and Clyde G. Reed. Free Improvisation as a Path-Dependent Process. Edited by George E. Lewis and Benjamin Piekut. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780195370935.013.018.

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Freely improvised music lacks commonly used mechanisms (e.g., scores, conductors, shared performance practices) that serve to coordinate choices across performers in other musical genres. This chapter analyses problems and solutions of musical coordination in free improvisation through the lens of “path dependence,” an analytic framework used in economics to model situations in which agents perceive a high pay-off to coordinating market choices. Key results in the path-dependence literature are the likelihood of multiple equilibria and “lock-in” to inferior outcomes. The interpersonal skills identified as critical for coordination in free improvisation closely parallel the skills that have been identified by social scientists as essential for high-functioning group behavior in non-musical pursuits. This suggests a pedagogical role for improvisation in enhancing economic and personal well-being with regard to human capital formation and happiness.
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Diner, Hasia. American Jewish History. Edited by Martin Goodman. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780199280322.013.0019.

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American Jewish history as a field of scholarly inquiry takes as its subject-matter the experience of Jews in the United States and places it within the context of both modern Jewish history and the history of the United States. Its practitioners see their intellectual project as inextricably connected to both histories. At the beginning of the twenty-first century the enterprise of American Jewish history enjoys a condition of robust health. By the 1990s American immigration history had generally declined in favour within the ranks of American historians. That Jews, outsiders to American culture upon their arrival in the United States, were able to penetrate barriers and enter the mainstream clashes with the way historians want to see the American past. As a group who craved both economic security and respectability, their story lacks the dramatic punch of resisters and rebels to the American ethos.
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Book chapters on the topic "Groupe des lacets"

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Argue, Charles L. "Lacera Group." In The Pollination Biology of North American Orchids: Volume 1. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0592-4_11.

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Lusztig, George. "Positivity of the Action of F i , E i in the Simply-Laced Case." In Introduction to Quantum Groups. Birkhäuser Boston, 2010. http://dx.doi.org/10.1007/978-0-8176-4717-9_22.

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Tsai, Catherine, Jacelyn M. S. Loh, Sam Blanchett, and Thomas Proft. "Using Lactococcus lactis as Surrogate Organism to Study Group A Streptococcus Surface Proteins." In Methods in Molecular Biology. Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0467-0_11.

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Breton, J., J. L. Martin, J. C. Lambry, S. J. Robles, and D. C. Youvan. "Ground State and Femtosecond Transient Absorption Spectroscopy of a Mutant of Rhodobacter capsulatus which Lacks the Initial Electron Acceptor Bacteriopheophytin." In Reaction Centers of Photosynthetic Bacteria. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-61297-8_29.

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Palop-García, Pau. "Diaspora Policies, Consular Services and Social Protection for Spanish Citizens Abroad." In IMISCOE Research Series. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51245-3_27.

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Abstract This chapter outlines the social protection policies that Spain has adopted to target Spanish nationals abroad. First, it describes the diaspora infrastructure and the key engagement policies developed in the last years by Spain. Subsequently, the chapter focuses on five social protection policies: unemployment, health care, pensions, family-related benefits, and economic hardship. The findings reveal that Spain has adopted a diaspora strategy that targets different emigrant groups such as exiles of the Civil War and early Francoism and their descendants, Spaniards that emigrated to other European countries during the 1950s and 1960s, and new emigrants that left the country due to the consequences of the financial crisis of 2008. Findings also show that, although Spain has developed a wide array of services to target its diverse diaspora, it still lacks a comprehensive scheme of social protection abroad. Moreover, the results suggest that Spain has adopted a subsidiary social policy strategy abroad that is triggered when the social protection offered by states of reception is lacking.
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Ferrari, Marco, Nausica Montalto, and Piero Nicolai. "Novel Approaches in Surgical Management: How to Assess Surgical Margins." In Critical Issues in Head and Neck Oncology. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63234-2_7.

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AbstractThe concept of surgical margins was born a long time ago but still lacks a univocal and sound understanding. The current biological rationale behind the recommendations on margins management relies on two pillars: (1) the observation that groups of cancer cells can leave the macroscopic tumor and disseminate throughout adjacent tissues with different degrees of aggressiveness; (2) the belief that removal of all (or most of) cancer cells can cure the patient. However, this background is undermined by some pieces of evidence. For instance, it has been proven that tissues surrounding cancer often bear precancerous traits, which means that cutting through non-cancerous tissues does not equate to cut through healthy tissues. The head and neck exquisitely poses a number of challenges in the achievement of negative margins, with special reference to anatomical complexity, high density in relevant structures, and unique histological heterogeneity of cancers. Currently, intraoperative margins evaluation relies on surgeons’ sight, palpation, ability to map tumor extension on imaging, and knowledge of anatomy, with some optical imaging technologies aiding the delineation of the mucosal margins of excision. Frozen sections are currently used to intraoperatively evaluate margins, yet with debate on whether and how this practice should be performed. Future perspectives on improvement of margins control are threefold: research is oriented towards refinements of understanding of cancers local progression, implementation of technologies to intraoperatively render tumor extension, and employment of optical imaging modalities capable of detecting foci of residual tumor in the surgical bed.
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Peltokorpi, Jaakko, and Mohamad Y. Jaber. "Potential Models of Group Learning in Production." In Advances in Transdisciplinary Engineering. IOS Press, 2020. http://dx.doi.org/10.3233/atde200158.

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Working in groups is beneficial for many complex production jobs as groups can have the cognitive and physical capacity that lacks from individuals. The group learning process is complicated when, in addition to individual learning by doing, the number of workers and knowledge transfer have their effects. Production managers need tools for analyzing and predicting group performance and learning over future production periods. Mathematical learning curve models are one of those tools that managers use, with a few are available for groups. This paper reviews potential group learning curve models for production environments. The models are fitted to data from an assembly experiment consisting of different group sizes and repetitions. The results show that more parameters improve the fit. A qualitative evaluation has been performed to answer how well the models reflect group learning and support decision making in production and how their prediction of data could be improved. The results suggest that the S-shaped model performed the best making it a potential one for describing learning in groups in production environments. The paper also suggests future directions along with this line of research.
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Malliavin, Paul. "Factorisation de Wiener–Akutowicz–Helson–Lowdenslager–Masani et Décomposition de Borel-Weil sur des Groupes de Lacets Mesurés." In The Journal of Fourier Analysis and Applications. CRC Press, 2020. http://dx.doi.org/10.1201/9780429332838-24.

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Curti, Roberto, and Roberto Curti. "Prologue (and Epilogue)." In Blood and Black Lace. Liverpool University Press, 2020. http://dx.doi.org/10.3828/liverpool/9781911325932.003.0001.

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This chapter provides an overview of Mario Bava's film Blood and Black Lace (6 donne per l'assassino) in 1964. It mentions critics and commentators of the Blood and Black Lace movie who were spellbound by its fascinating visual analogy that links the opening and final images. It also looks into analyzations of the film that proposes the most disparate interpretations. The chapter discusses Bava's demystifying explanation of his movie in an interview published in 1979, just one year before his death. It talks about the significance of the opening scene of Blood and Black Lace and interprets the connection between the signboard swinging at the beginning, during a rainstorm, and the telephone falling on the ground.
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Biggiero, Lucio, and Enrico Sevi. "On the Relationships between Connection Modes and Workgroup Performance." In Relational Methodologies and Epistemology in Economics and Management Sciences. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9770-6.ch013.

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Notwithstanding the central place covered inside organization science and the economic theory of the firm, organization design theory still lacks sound building blocks concerning the effects that some fundamental variables have on workgroup performance. In this chapter a contribution to fill in this gap is given with reference to the relationships between connection modes and performance. In particular, through an agent-based simulation model a number of experiments have been done respect to the moderating role played by group size and task complexity. Results confirm current (but not really scientific) knowledge, and bring forth our understanding of these fundamental (and mostly nonlinear) relationships. Among the main results, it can be underlined that the best combinations between connection modes, task complexity, and workgroup size occur when complex tasks are connected by mutual adaptation and run by a small number of agents, or when less complex tasks are connected by parallel or sequential interdependence and performed by a large number of agents. Moreover, when a modules volume to be worked out is heterogeneous in terms of connection modes between module's tasks, and thus, a multi-mode group should be issued, respect to the corresponding choice of issuing specialized groups there is a general decrease in efficacy.
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Conference papers on the topic "Groupe des lacets"

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Felisiak, Mariusz, and Daniel Simson. "On Computing Mesh Root Systems and the Isotropy Group for Simply-laced Dynkin Diagrams." In 2012 14th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC). IEEE, 2012. http://dx.doi.org/10.1109/synasc.2012.16.

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Rosa, Raphael, and Christian Rothenberg. "Experiences in IETF-BMWG: Towards a Methodology for VNF Benchmarking Automation." In Workshop Pré-IETF. Sociedade Brasileira de Computação, 2020. http://dx.doi.org/10.5753/wpietf.2020.13795.

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Network Functions Virtualization (NFV) aims at high-end carriergrade performance but lacks common methodologies for testing Virtual Network Functions (VNFs). Benchmarking VNFs should consider different degrees of freedom instead of the black-box common approaches created for bare metal network functions. We understand such status-quo needs to be altered having basis on the solid ground of extensive and automated experimentation. Since 2015, we have been addressing a role in this scenario, from a position paper to the creation of the draft “Methodology for VNF Benchmarking Automation” in the Internet Engineering Task Force (IETF) Benchmarking Methodology Working Group (BMWG). This paper tells the tale about this draft in BMWG, associated with the perks of developing an open source reference implementation and academic papers, as the means of the old IETF mantra on running code. The story intends to showcase our experiences in IETF and BMWG, covering technical content (e.g., YANG models) as much as draft reviews on mailing-lists.
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Mock, Adam, Chad Roller, Jim Jeffers, Khosrow Namjou, Patrick J. McCann, and Joe Grego. "Real-time ground level atmospheric nitric oxide measured by calibrated TDLAS system." In Laser Applications to Chemical and Environmental Analysis. OSA, 2002. http://dx.doi.org/10.1364/lacea.2002.sac4.

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Puentes, Lucas, Jonathan Cagan, and Christopher McComb. "Automated Heuristic Induction From Human Design Data." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22151.

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Abstract Through experience, designers develop guiding principles, or heuristics, to aid decision-making in familiar design domains. Generalized versions of common design heuristics have been identified across multiple domains and applied by novices to design problems. Previous work leveraged a sample of these common heuristics to assist in an agent-based design process, which typically lacks heuristics. These predefined heuristics were translated into sequences of specifically applied design changes that followed the theme of the heuristic. To overcome the upfront burden, need for human interpretation, and lack of generality of this manual process, this paper presents a methodology that induces frequent heuristic sequences from an existing timeseries design change dataset. Individual induced sequences are then algorithmically grouped based on similarity to form groups that each represent a shared general heuristic. The heuristic induction methodology is applied to data from two human design studies in different design domains. The first dataset, collected from a truss design task, finds a highly similar set of general heuristics used by human designers to that which was hand selected for the previous computational agent study. The second dataset, collected from a cooling system design problem, demonstrates further applicability and generality of the heuristic induction process. Through this heuristic induction technique, designers working in a specified domain can learn from others’ prior problem-solving strategies and use these strategies in their own future design problems.
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Sigler, Jorge, and Amanda Gray. "Leader-Follower dynamics within medical students’ groups during clinical rotations." In Fifth International Conference on Higher Education Advances. Universitat Politècnica València, 2019. http://dx.doi.org/10.4995/head19.2019.8968.

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Clinical practical training is a common practice and a requirement for many medical professions in the U.S.A. This training often lacks in managerial and leadership training, leaving many future practitioners poorly prepared for the challenges and requirements of leadership roles. The complexity of the healthcare system brings about new challenges in terms of leadership, with the development of leadership skills for practicing physicians becoming even more crucial. This study analyzed a sample of students and resident doctors in a psychiatric setting during their clinical rotation. The particularities of the observed emergence of leadership within the scope of multiple theoretical frameworks in the field of leadership were analyzed by calculating the median values of each set of survey responses. The study found that biological sex did not play a significant role in Leader emergence (p=0.74), Followers scored Leaders highly overall, and Leaders showed that they had a solid insight into their own capacities and limitations. Overall, strong leadership qualities were identified across all theoretical frameworks with valuable implications for the development of future leadership training. More research is needed to test this methodology in different medical settings and to identify the most effective type of leadership training for clinical education.
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Budzisch, Josefina. "Definitheit im Selkupischen." In N/A. University of Szeged, 2021. http://dx.doi.org/10.14232/sua.2021.55.

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The dissertation at hand deals with definiteness in Selkup. It is investigated how in Selkup – taking the three dialect groups North, Central and South Selkup into account – semantic-pragmatic definiteness is expressed, since the language lacks an explicit grammatical marker (like a definite article) for the expression of definiteness. The analysis is carried out on the basis of existing research literature, elicit data and a corpus, which is composed of 248 texts with 12,828 sentences and 77,443 tokens.In its entirety, Selkup thus shows that demonstratives, possessive associations and the non-possessive use of the possessive suffix of the third person singular are the most important strategies for marking definiteness. All types of references, however, contain large numbers of unmarked noun phrases, showing that context is often the decisive factor in deciding whether a noun phrase is to be interpreted as definite or indefinite.
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Babaki, Behrouz, Tias Guns, and Luc de Raedt. "Stochastic Constraint Programming with And-Or Branch-and-Bound." In Twenty-Sixth International Joint Conference on Artificial Intelligence. International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/76.

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Complex multi-stage decision making problems often involve uncertainty, for example, regarding demand or processing times. Stochastic constraint programming was proposed as a way to formulate and solve such decision problems, involving arbitrary constraints over both decision and random variables. What stochastic constraint programming still lacks is support for the use of factorized probabilistic models that are popular in the graphical model community. We show how a state-of-the-art probabilistic inference engine can be integrated into standard constraint solvers. The resulting approach searches over the And-Or search tree directly, and we investigate tight bounds on the expected utility objective. This significantly improves search efficiency and outperforms scenario-based methods that ground out the possible worlds.
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Sankowski, Olga, and Dieter Krause. "Using Multi-Channel Human-System Interaction for User-Centered Product Design." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88091.

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User-centered product design (UCPD) and especially its methods and tools offer a lot of benefits to product development. By using specific data of the user group or by including them into the design process, systems with better functionality and usability arise. However, including the users in an optimum manner means to include them over the whole product development process, which is costly and often too time-consuming regarding the ever shorter product life cycles. An extensive application of UCPD methods is therefore usually not practical for industry. In order to (1) support the user-centered development process in general and (2) support the selection of appropriate UCPD methods, a multi-channel human-system interaction framework is proposed. It is derived from existing human-computer and human-machine interaction models and further includes additional factors influencing the human-system interaction. However, the framework itself needs further and more detailed elaboration and discussion and currently lacks an allocation of UCPD methods.
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Johnson, Thomas A., Jonathan M. Jobe, Christiaan J. J. Paredis, and Roger Burkhart. "Modeling Continuous System Dynamics in SysML." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42754.

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In this paper, we present a formal approach to modeling continuous system dynamics in SysML using differential algebraic equations (DAE’s). To support model-based design, the Object Management Group has recently developed the Systems Modeling Language (OMG SysML™). The language is well-suited for modeling many different aspects of large-scale, multidisciplinary engineering projects. It allows systems designers to capture information concerning system requirements, tests, structures, functions, and behaviors. However, SysML lacks explicit support for modeling continuous system dynamics using DAE’s. Such models are important for representing system behavior resulting from energy or signal exchange between system components. We introduce support for modeling system dynamics in the form of a language mapping between SysML and Modelica, an equation-based, object-oriented behavioral simulation language. The bidirectional mapping provides support for creating system dynamics models in SysML that can exist alongside other SysML information models, but that can also be transformed into executable simulations by a Modelica solver. To illustrate the approach, we provide an example SysML model of a hydraulic pump.
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VAZNONIENĖ, Gintarė, and Bernardas VAZNONIS. "SOCIAL BENEFIT OF GREEN SPACES TO LOCAL COMMUNITY." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.214.

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The article deals with the concept of green spaces by highlighting its social benefit to the local community. Green spaces have become an important element in shaping rural and urban public spaces, creating attractive living surrounding, promoting integration, interaction and participation of locals, strengthening their health and enhancing overall wellbeing. Moreover, green spaces are often characterized as public spaces, so the interest in this topic implies that being in or using these spaces influences various social groups in any community. Unfortunately, the emphasis of social benefit of green spaces on the local level still lacks solid grounds in the social science discourse in Lithuania. In view of the above, the research methodology includes both theoretical and empirical research methods, where the following scientific problem is addressed: the ways or forms that the social benefit of green spaces manifests itself in relation to local communities? The aim of the research is to analyse manifestation of social benefit of green spaces to local community. The results of scientific literature analysis and interview with the specialists have provided some common insights such as how social benefit of green spaces can manifest itself on the local level. It has been acknowledged that, in terms of social benefit, green spaces are multifunctional, with their main purpose, however, being satisfaction of the needs of local community needs at the place they live in. Although green spaces are not fitted enough to support active participation, awareness of the variety of existing green spaces may contribute to promotion of various local community activities, interaction between different social groups, and appears as a “social bridge”, influencing overall wellbeing of individuals and community.
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Reports on the topic "Groupe des lacets"

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Corriveau, L., and A. L. Bonnet. Volcanisme pyroclastique protérozoïque dans le Groupe de Wakeham, région des lacs Musquaro et d'Auteuil, Province de Grenville, Québec. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2001. http://dx.doi.org/10.4095/212172.

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Ground water resources of the Mille Lacs Lake area, east-central Minnesota. US Geological Survey, 1998. http://dx.doi.org/10.3133/wri974116.

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