Univ., Diss.--Karlsruhe, 1999.

Thesis--Halle-Wittenberg. / Cover title. Vita. Includes bibliographical references (p. [85]-86).

Made available in DSpace on 2015-04-22T22:16:11Z (GMT). No. of bitstreams: 1 Dissertacao Walter Lucas Pinto.pdf: 3826919 bytes, checksum: 2d46d1c5f92ab885832ed054b123f3f5 (MD5) Previous issue date: 2009-02-27 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / In this paper we will study about Ribaucour Transformations and we will use the definition proposed by K.Tenenblat in [1]. We will study concerning the geometric aspects of such transformations and we will obtain as applications some Dupin surfaces in the R3 that are associated by a such Transformation. We will also present the visualization of those surfaces using resources of graphic computation. / Neste trabalho faremos um estudo acerca de Transformações de Ribaucour e usaremos a definição proposta por K.Tenenblat em [1]. Estudaremos acerca dos aspectos geométricos de tais transformações e obteremos como aplicações algumas superfícies de Dupin no R3 que estão associadas por uma tal Transformação. Apresentaremos também a visualização dessas superfícies usando recursos de computação gráfica.

Louise Dupin (1706-1799), illustre salonnière à son époque, est une auteure « féministe » dont la pensée reste aujourd’hui méconnue : ses manuscrits – de la main d’un secrétaire qui a pour nom Jean-Jacques Rousseau – ont effectivement attendu un siècle et demi avant de sortir des mains de ses héritiers. Ils sont ensuite restés soixante ans inédits en raison de leur dispersion géographique. Nous proposons ici au lecteur, pour la première fois, une transcription des parties historique et éducative de son Ouvrage sur les femmes. On lira aussi la partie féministe de sa « Critique de l’Esprit des lois ». La châtelaine de Chenonceau a en effet été l’une des premières à risquer une réfutation du livre de Montesquieu. Voltaire en a été un lecteur attentif. Comment donc s’articulent chez elle réflexion féministe et réflexion politique dans le cadre d’une pensée aux prises avec les grands philosophes de son temps ? En quoi son monarchisme est-il en partie bousculé par des convictions dont le maître-mot est l’égalité ? C’est au coeur de sa pensée historique, politique et morale – à la fois équilibrée, érudite et pugnace – que nous souhaiterions entraîner le lecteur. / In her day Louise Dupin (1706-1799) was a famous salon holder and a "feminist" author whose writings are still relatively unknown. It took a century and a half for her manuscripts – written by her secretary, a certain Jean-Jacques Rousseau – to leave the hands of her inheritors. Then, due to their geographical dispersion, they remained unpublished for a further sixty years. For the first time, readers can now consult a transcription of the historical and educational parts of her Ouvrage sur les femmes. We shall also explore the feminist part of her "Critique de l’Esprit des lois". The chatelaine of Chenonceau was in fact one of the first to risk a refutation of Montesquieu's work. Voltaire read it attentively. How did she articulate her feminist and political thought in her encounters with the great philosophers of her day? To what degree was her monarchism troubled by convictions whose keyword was equality? We would like to introduce readers to the balanced, erudite and pugnacious character of her historical, political and moral thinking.

Scholarship on Edgar Allan Poe's Dupin stories consistently focuses on the stories' influence on the genre of detective fiction. One of the foundational genre elements pioneered by Poe in these tales is the sidekick/narrator. Throughout detective fiction, the less-intelligent sidekick has become a standard fixture, a convenient trope in foregrounding the brilliant machinations of the detective's mind. The attention the literature gives to the narrator of the Dupin tales is almost universally in terms of the sidekick/narrator figure as a trope of detective fiction; in this way, it seems that Dupin's companion has come to be read in terms of what he has in common with his successors, the Watsons and Archie Goodwins of mystery stories, rather than more strictly on the terms of what makes him unique. This thesis examines the ways in which the narrator alternately highlights (in subtle ways) and attempts to obfuscate (in equally subtle ways) his role as the fictional author of the tales. The narrator's role as writer complicates the reading of Dupin as the autonomous master of his own narrative, and as the narrator himself as a generic, dim-witted sidekick. In this way, Dupin and the narrator occupy flip sides of the same narrative coin—Dupin serves as the showman, and the narrator, the invisible author. As contrasting, complementary doubles of one another, they perform the function of collaborative authors, each one equally essential to the production of the tales. Similarly, this reevaluation of the narrator/sidekick as an author figure brings out ways in which the narrator's genius parallels and matches the genius of Dupin.

Made available in DSpace on 2014-07-29T16:02:23Z (GMT). No. of bitstreams: 1 DISSERTACAO.pdf: 293631 bytes, checksum: 5c813b219dd91ac79277b83be339ffcd (MD5) Previous issue date: 2008-03-28 / In this work we study some results from the article of Tomas E. Cecil, On the Lie curvature of Dupin hypersurfaces [4]. We study the basic concepts of Lie sphere geometry, which given the framework for the study of Dupin hypersurfaces in the Lie sphere geometry. We construct example of a non-compact proper Dupin hypersurface immersed in Sn on which the Lie curvature &#936; = 1/2 which is not Lie equivalent to an open subset of an isoparametric hypersurface in Sn. We also produce example on which Lie curvature &#936; has a constant value c, 0 < c < 1. / Neste trabalho estudamos alguns resultados do artigo de Tomas E. Cecil, On the Lie curvature of Dupin hypersurfaces [4]. Estudamos os conceitos básicos da geometria de Lie, que fornece as ferramentas necessárias para o estudo das hipersuperfícies de Dupin na geometria de Lie. Construímos exemplos de uma hipersuperfície de Dupin própria não compacta mergulhada em Sn, com curvatura de Lie &#936; = 1/2 e que não é Lie equivalente a um subconjunto aberto de uma hipersuperfície isoparamétrica em Sn. Também construímos exemplos onde a curvatura de Lie &#936; tem valor constante c, 0 < c < 1.

La thèse porte sur le raccordement de surfaces canal en modélisation géométriques en utilisant des morceaux de cyclides de Dupin. Elle tente de répondre à un problème de reconstruction de pièces controlées et usinées par le CEA de Valduc. En se plaçant dans l'espace adéquat, l'espace des sphères, dans lequel nous pouvons manipuler à la fois les points, les sphères et les surfaces canal, nous simplifions considérablement certains problèmes. Cet espace est représenté par une quadrique de dimension 4 dans un espace de dimension 5, muni de la forme de Lorentz : l'espace de Lorentz. Dans l'espace des sphères, les problèmes de recollements de surfaces canal par des morceaux de cyclides de Dupin se simplifient en problèmes linéaires. Nous donnons les algorithmes permettant de réaliser ce type de jointures en utilisant l'espace des sphères puis nous revenons dans l'espace à 3 dimensions usuel. Ces jointures se font toujours le long de cercles caractéristiques des surfaces considérées. En résolvant le problème dit des trois conditions de contact, nous mettons en évidence une autre courbe particulière, sur une famille à un paramètre de cyclides, que nous appellons courbe de contact qui permettrait d'effectuer des jointures le long d'autres courbes / The thesis deals with the blending of canal surfaces in geometric modeling using pieces of Dupin Cyclides. We try to solve a problem of reconstructing real parts manufactured and controlled by the CEA of Valduc. Using the space of spheres in which we can manipulate both points, spheres and canal surfaces, we simplify some problems. This space is represented by a 4-dimensional quadric in a 5-dimensional space, equipped with the Lorentz form, it is the Lorentz space. In the space of spheres, problems of blending canal surfaces by pieces of Dupin cyclides are simplified in linear problems. We give algorithms to make such blends using the space of spheres and after we come back to 3 dimensions to draw the result. These blends are always made along characteristics circles of the considered surfaces. By solving the problem of three contact conditions, we highlight another particular curve, on a one parameter familly of cyclides, that we call contact curve along which we could also make this kind of blends

Cette thèse étudie la naissance du consulat français de Barcelone comme institution royale (1679-1716). La longue adaptation aux réformes de Colbert et Pontchartrain caractérise la vie et le développement de l'institution comme le montrent l'étude de la correspondance, la naissance de la chancellerie ou des vice-consulats et l'obtention des postes consulaires. L'étude locale du consulat est envisagée dans les conséquences globales de sa gestion, notamment dans la perspective de la politique économique menée par Seignelay, Louis et Jérôme de Pontchartrain en Espagne et, au-delà, via le commerce interlope direct comme indirect, en Amérique latine. À cette fin, la figure du consul marchand et son attitude vis-à-vis des consignes royales sont étudiées à travers les trois consuls successifs : Laurent Soleil (1679-1705), Jean-Philippe Monclus (1705-1709) et Simon Dupin (1709-1716). Le consulat de Laurent Soleil et son activité marchande à Barcelone sont détaillées. L'implication de ce dernier dans des expériences originales avec les théoriciens catalans de l'économie tels que Marti Piles et Josep Aparici est démontrée. L'intérêt commun d'acteurs divers, dans un contexte de rivalités, pour des projets économiques communs est étudié à travers l'exemple du commerce avec Tunis. La question de l'utilisation du consulat comme moyen de consolider les affaires marchandes de son détenteur et comme assurance face aux aléas de la guerre est posée. Plus généralement, l'attitude et l'adaptation des acteurs marchands dans une province touchée par les guerres régulièrement sont étudiées. / This thesis studies the birth of the French consulate of Barcelona as a royal institution (1679-1716). The long adaptation to the reforms of Colbert and Pontchartrain characterizes the life and the development of the institution as shown through the study of the correspondence, the birth of the chancellery or the vice-consulates and the obtaining of the consular position. The local study of the consulate is envisaged in the global consequences of its management, in particular with the prospect of the economic policy led by Seignelay, Louis and Jérôme de Pontchartrain in Spain and, beyond, via the illicit business, in Latin America. To this end, the figure of the trade consul and his attitude towards the royal instructions are studied through three successive consuls: Laurent Soleil (1679-1705), Jean-Philippe Monclus (1705-1709) and Simon Dupin (1709-1716). Laurent Soleil's consulate and its trade activity in Barcelona are detailed. The implication of the latter in original experiences with the Catalan theorists of the economy such as Marti Piles and Josep Aparici is demonstrated. The common interest of diverse actors, in a context of rivalries, for common economic projects is studied through the example of the trade with Tw1Îs. The question of the use of the consulate as the way to strengthen the trade business of his holder and as insurance in front of hazards of the war is put. More generally, the attitude and the adaptation of the trade actors in a province regularly affected by the wars are studied.

La thèse porte sur le raccordement de surfaces canal en modélisation géométriques en utilisant des morceaux de cyclides de Dupin. Elle tente de répondre à un problème de reconstruction de pièces controlées et usinées par le CEA de Valduc. En se plaçant dans l'espace adéquat, l'espace des sphères, dans lequel nous pouvons manipuler à la fois les points, les sphères et les surfaces canal, nous simplifions considérablement certains problèmes. Cet espace est représenté par une quadrique de dimension 4 dans un espace de dimension 5, muni de la forme de Lorentz : l'espace de Lorentz. Dans l'espace des sphères, les problèmes de recollements de surfaces canal par des morceaux de cyclides de Dupin se simplifient en problèmes linéaires. Nous donnons les algorithmes permettant de réaliser ce type de jointures en utilisant l'espace des sphères puis nous revenons dans l'espace à 3 dimensions usuel. Ces jointures se font toujours le long de cercles caractéristiques des surfaces considérées. En résolvant le problème dit des trois conditions de contact, nous mettons en évidence une autre courbe particulière, sur une famille à un paramètre de cyclides, que nous appellons courbe de contact qui permettrait d'effectuer des jointures le long d'autres courbes

When seen among the constellation of Edgar Allan Poe's works culminating in Eureka, "The Colloquy of Monos and Una" and "The Mystery of Marie Rogêt," take on an important role as vehicles for scientific contemplation. Similar to early quantum physicists, such as Einstein and Schrödinger, Poe uses macro-level analogies to explore the unity of individual entities, which becomes an important tenet of his explanation of the universe. His thought experiments also resemble those of modern physics in their approach to reality as probabilistic, an idea that finds its echo in quantum field theory, which distinguishes between observed particles and their underlying existence as vibrations in a field rather than distinct units. In this thesis, I use specific examples from "Monos and Una" to demonstrate that the barrier between individuals blurs when viewed from the perspective of a unified field. I also examine ways that "Marie Rogêt" expands the idea of a unified field in terms of entangled individuals and correlated events, and pushes against the Newtonian deterministic tradition. In the context of Poe's body of work, these stories depart from the aesthetic that characterizes many of his most widely-read stories, in that their exploration of the scientific seems to overtake the narrative. However, their composition, which leaves some readers dissatisfied, expertly comments on the dichotomy between the observed and the real, and the role that narrative plays in interpreting experience.