Cette thèse a pour objet de concevoir des mécanismes d'allocation dans le contexte des enchères doubles dynamiques (achats groupés, bourses électroniques). Le principal défi inhérent à la conception de tels mécanismes est d'aboutir à un résultat socialement optimal alors que la dynamique induit une incertitude sur les arrivées et départs des participants de l'enchère ainsi que sur les valuations qui peuvent être fluctuantes. Dans cette thèse, nous proposons des mécanismes qui sont efficaces, incitatifs et garantissant l'équilibre du budget. La définition de ces mécanismes s'appuient sur les algorithmes d'appareillage pour des graphes bipartis (technique d'augmentation et réduction) ainsi que sur une méthode générale prenant en compte le comportement des participants. / This thesis addresses the problem of designing mechanisms that lead to socially desirable outcomes in dynamic double auction markets such as stock exchanges and group buying. The main challenge of the design is dealing with the uncertainty posed by the participants who are dynamically arriving and departing and their valuations vary over time. The thesis demonstrates the difficulties in designing mechanisms with desirable properties such as truthfulness, efficiency and budget balance. It also provides dedicated mechanisms satisfying those properties by using augmentation, reduction and behaviour-based approaches.

Thesis (M.A.)--Kutztown University of Pennsylvania, 1999. / Source: Masters Abstracts International, Volume: 45-06, page: 2836. Typescript. Abstract appears on leaf [1]-2. Includes bibliographical references (leaves 92-94).

Les aciers de structures sont sujets aux phénomène de vieillissement sous déformation qui se traduit, par exemple, par des modifications de la limite d'élasticité, une augmentation du durcissement et une diminution de la ductilité. Le vieillissement statique est associé aux pics et aux paliers de Lüders, tandis que le vieillissement dynamique est associé à l'effet Portevin - Le Chatelier, responsable de la localisation de la plasticité et des instabilités mécaniques. L'origine de ces comportements macroscopiques provient des interactions fortes à l'échelle atomique entre les atomes de soluté, et en particulier le carbone, et les dislocations. Ce travail de thèse se propose de caractériser l'interaction entre un atome de carbone en site interstitiel octaédnque et une dislocation vis par des simulations numériques à l'échelle atomique, Les propriétés des dislocations dans le fer cubique centré étant étroitement liées à la structure de cœur des dislocations, structure dépendant elle-même fortement du potentiel interatomique utilisé, ce travail a été effectué à l'aide d'un potentiel d'interaction empirique récemment mis au point et qui reproduit correctement la structure non dégénérée du cœur de la dislocation vis, comme le prédisent les calculs ab initio, Dans un premier temps, do:s calculs de statique moléculaire ont permis de déterminer les énergies d'interaction entre la dislocation et le carbone pour diverses positions de ce dernier. Une étude dynamique a ensuite été menée permettant de déterminer de manière qualitative l'influence du carbone sur le mouvement de la dislocation et le développement des mécanismes fondamentaux de la plasticité. Les simulations effectuées dans le cadre de cette thèse s'inscrivent dans la démarche de la modélisation multi-échelles dont l'objectif à long terme est de prédire l'évolution des propriétés des matériaux en se basant sur des mécanismes physiques élémentaires décrits depuis les échelles atomiques, / Carbon is one of the most frequent foreign interstitial atoms in the iron matrix, The presence of even a very little amount of these impurities can have a drastic inl1uence on the steel properties, It is well know that the strong interaction between interstitial solute carbon atoms and dislocations drive many mechanical properties of steels, ln partieular, it has important effects on the yield stress and is responsible of mechanical instabilities observed during the static strain ageing, which implies the formation of Cottrell atmosphere (Lüders' band), and the dynamic strain ageing, which occurs generally at high temperature and involves a competitive motion of dislocations and interstitial atoms (Portevin - Le Chatelier effect). This thesis work aims at characterizing the interaction between an interstitial carbon atom and a dislocation by means of numerical simulations at the atomistic scale. Since the properties of dislocations in body-centered cubic iron rely mainly on the dislocation core structure which depends on the interatomic potential used, this work has been carried out with a newly designed empirical potential which describes correctly the non degenerated screw dislocation core structure, as predicted by ab initio calculations. ln a first part, molecular statics has been used to determine the binding energy between the screw dislocation and a carbon atom, placed in different positions, ln a second part, dynamical simulations have been performed by applying a constant shear strain to the simulation box which makes the dislocation move on its gliding plane, ln the course of these simulations, 3 types of behaviour were observed, When the dislocation arrives close to the carbon atom, it can keep moving on its plane, ln a second scenario, the dislocation changes of slip plane, this is a typical exemple of cross slip. ln the 3rd type of behaviour, it is the carbon atom which moves when the dislocation is too close to it. It can jump to an adjacent octahedral site of the same plane or move onto another plane, The kind of behaviour observed depends on the local structure of the dislocation core in the vinicity of the carbon atom which intluence can be felt only lor short interaction distances. The simulations carried out in the frameworks of this thesis, are part of a multiscale modeling approach, which aims at predicting the evolution of material properties, based on the knowledge of the atomic structure and properties of elementar processes, i,e, processeses occuring at the atomic level.

Much has been written about the effectiveness of speculative fiction, especially utopian works. In this thesis I will examine the source of fear in Margaret Artwood’s works The Handmaid’s Tale and Oryx and Crake using Sigmund Freud’s “The Uncanny” to illustrate the terror of doubles as they appear in the novels. The terror in The Handmaid’s Tale comes from the descriptions of distorted physical environments, while the horror in Oryx and Crake emanates from the familiar yet twisted animals and characters found inside the corporate compounds. Through the recognition of these doubles as uncanny, Atwood’s work moves readers to cognition and social action. / Includes bibliography. / Thesis (M.A.)--Florida Atlantic University, 2016. / FAU Electronic Theses and Dissertations Collection

Thesis (M.A.)--University of Southern California, 2006. / Adviser: Dominic Cheung. Includes bibliographical references (p. 69-74)

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Thèse de doctorat : sciences. Chimie : Ecully, Ecole centrale de Lyon : 2006. Thèse de doctorat : sciences. Chimie : Faculté des sciences de Monastir : 2006. / 338 réf.

Thèse de doctorat : sciences. Chimie : Ecully, Ecole centrale de Lyon : 2006. Thèse de doctorat : sciences. Chimie : Faculté des sciences de Monastir : 2006. / Titre provenant de l'écran-titre. 338 réf.

Marguerite Yourcenar was a prolific writer and we can deduce that in the course of her writings, the revised version played a very important role. Thus, several pieces of works such as D'apres Rembrandt, D'apres Greco, D'apres Durer gave birth to L'OEuvre au noir, Anna soror..., Un homme obscur and Une belle matinee. Denier du reve was rewritten twenty years later. The collection of short stories Nouvelles orientales underwent numerous changes during the course of more than fifty years. / The "double" theme marks the different narratives of this work and the revised phenomena contributes to the emergence in all its elements. Therefore, all through this thesis, we will show the events which reveals the presence of the "double" such as a story within a story (mise en abyme) and flashbacks that are present in the narration, the theme of remembrance, the different microcosms contained in the macrocosms, but also the opposing split personalities present in most of the protagonists. In addition, we can discover that these characters are united in creation and in all elements of the cosmos. Also, we have the production of opposing forces between creation and man. In Yourcenar's work, especially in Nouvelles orientales, we notice that in the "double" an absolute quest is presented in its different play of mirrors. It is as if this fusion of the human with the universe brings each character to be part of the Universality, beyond time, space and the world of the material.

The first part of this Master's thesis is a story presented as an inner monologue where three periods of the narrator's life (the winter when she was nine years old, a recent trip to Ireland and her return to Montreal) interlace as three parallel miscarried lives. At times through entire episodes, at times through the echo of sentences once spoken or heard, Pamela's past lives contaminate the story of her forced return to Montreal to attend her father's funeral. They intermingle in a duplicate narrative, a fabled dialogue between times. / In the second part, we intend to analyse the theme of the double in two of Romain Gary's novels: Au-dela de cette limite votre ticket n'est plus valable and Gros-Calin. The study demonstrates that the subject uses doubling to engender his self so that he can avoid the determinism that condemns him to a non-existence. Gary's hero refuses any god other than the one within himself: an infinite and immortal double from whom he has become seperated against his will at birth. He reinstates his unlimited potential as a creator by returning to a time before this world, a time not determined by external forces. He then undertakes to give life to his divine double by projecting him on others. The hero hopes that he will thus be endlessly reborn. The embodied ideal double, however, soon turns into the original which the hero imitates, becoming a double himself.