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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Stabilité des massifs rocheux : une approche mécanique

Duriez, Jérôme 20 November 2009 (has links) (PDF)
Résumé La prédiction efficace des éboulements rocheux constitue un des moyens pour se prémunirvis-à-vis du risque naturel représenté par les chutes de blocs. Les joints rocheux jouant un rôle décisif dans le déclenchement de ces éboulements, il faut décrire du mieux possible le comportement mécanique de ceux-ci, et en particulier leur rupture. Une nouvelle loi de comportement de joint rocheux, incrémentalement non linéaire, est ainsi proposée, parallèlement à l'utilisation du critère du “travail du second ordre” pour détecter les conditions impliquant un éboulement. La définition de la loi se base sur un modèle numérique de joint rocheux, utilisant la méthode aux Éléments Discrets via le code Yade. Une fois le comportement des joints rocheux investigué grâce à ce modèle numérique (en lien avec des résultats expérimentaux), et la loi définie puis validée, cette-dernière est étudiée vis-à-vis de ce critère du travail du second ordre. L'existence de “directions instables” de sollicitation, susceptibles d'entraîner la rupture du joint rocheux avant le critère de Mohr-Coulomb, est ainsi mise en évidence. Ces directions instables dépendent tout particulièrement des couplages entre les directions normale et tangentielle du joint rocheux. Une falaise existante est enfin analysée : les “Gorges de Valabres”, situées dans les Alpes-Maritimes. L'analyse est effectuée en utilisant la nouvelle loi de comportement, et le critère du travail du second ordre, dans le cadre d'un modèle numérique discret de la falaise. On observe alors que des sollicitations du chargement simulé correspondent pour certains joints à des directions instables.
2

A vertente real da nomeção: entre a representação e objeto

Barreto, Elisângela Ferreira 24 May 2013 (has links)
Made available in DSpace on 2015-05-14T12:39:48Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1508044 bytes, checksum: e643dd93bcc6880e546e3502956443da (MD5) Previous issue date: 2013-05-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The investigation of this doctorate s thesis is related to the vicissitudes that lead to a psychotic individual to be able to stabilize from a nomination. Therefore, we intended to outline the field of representation concept from Aristotle, afterwards the one by Freud and his formalization about the psychic apparatus, up to Lacan and the non-representable and not-all concepts. The hypothesis, presented here, focus, essentially, on Lacan´s concept of object a and in its real function of being support of the individual s jouissance. In this research, we supposed that, in psychosis, the object a while not being extracted, it would be articulated to the nomination so as to promote the possibility of a psychic organization, with stabilization effect that could be described as possible consequences to the construction of social bond for the psychotic individual and the circumscription of the unmeasured and incommunicable jouissance that, in the psychosis, is presented as invasive and external to the individual. We are sure that the real aspect of nomination, in the psychosis, occurs from the link of the jouissance object with the name, making up a sign, not of the linguistic order, but a sign of jouissance, that would be articulated more to the field of Yade l´Um concept There is One concept extracted from Lacan´s final teaching. The name must not only nominate, but it must also be the signature of a creation, of an act, mentioning the jouissance that can not be shared. In this creative research, the individual uses their savoir-y-faire, - know how to do it because, if the extraction of the object a was not possible, it must be known how to do it where it exists. / A investigação desta tese de doutorado tem relação com as vicissitudes que levam um sujeito psicótico a poder se estabilizar a partir de uma nomeação. Para isto, buscou-se delimitar o campo do conceito de representação desde Aristóteles, passando por Freud e sua formalização sobre o aparelho psíquico, chegando até Lacan e os conceitos de irrepresentável e não-todo. A hipótese aqui apresentada toca, primordialmente, no conceito lacaniano do objeto a e em sua função real, de ser suporte do gozo do sujeito. Neste trabalho supôs-se que, na psicose, o objeto a ao não ser extraído, estaria articulado à nomeação de modo a promover a possibilidade de uma organização psíquica, com efeito de estabilização que se poderia descrever como possíveis consequências à construção de laço social para o sujeito psicótico e a circunscrição do gozo desmedido e incomunicável que, na psicose, apresenta-se invasivo e exterior ao sujeito. Aposta-se, aqui, que a vertente real da nomeação, na psicose, dá-se a partir da articulação do objeto de gozo com o nome, compondo um signo, não da ordem linguística, mas um signo de gozo que se articularia mais ao campo do conceito do Yade l´Um Há Um conceito extraído do final do ensino de Lacan. O nome não deve apenas nomear, mas também ser a assinatura de uma criação, de um ato, localizando o gozo que não pode ser compartilhado. Nesse trabalho criativo, o sujeito utiliza o seu savoir-y-faire, saber fazer aí pois, se não foi possível a extração do objeto a, há que se saber fazer aí onde ele existe.
3

Zařízení pro zásyp odpichového otvoru obloukové pece / Device for filling tap hole of arc furnace

Juda, Lukáš January 2015 (has links)
Diploma thesis describes design and function verification of device for filling tap hole of electric arc furnace with tap hole diameter from 190 mm to 250 mm. The theses includes drive design calculation of chute swinging movement and bearing calculations. Another part of the thesis deals with verification of device functions which it is completed with process description of creating DEM simulation in program YADE. The thesis also includes basic experiments for determination angle of internal friction, angle of repose, coefficient of restitution and angle of material friction on a steel surface. Drawing documentation of selected assemblies is part of the thesis.

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