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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

Hautepierre : un éco-quartier modèle pour la ville de Strasbourg : utopie ou réalité ? / Hautepierre as an "eco-area" model for Strasbourg city : utopia or reality ?

Vodouhe, Sèlognon Gilles 22 September 2015 (has links)
Le choix de la ville de Strasbourg de faire du Projet de Rénovation Urbaine (PRU) de Hautepierre un « quartier jardin » questionne. Cette thèse se donne pour matière d’analyser les potentiels du quartier Hautepierre à être réhabilité en éco-quartier et s’intéresse au processus d’élaboration du PRU, à l’implication des habitants et aux discours des acteurs (habitants, bailleurs sociaux, professionnels et élus). L’évaluation de la participation des habitants au PRU de Hautepierre à l’aune de l’approche par les capabilités montre qu’il n’y a pas une participation active de ces derniers. Le « quartier jardin » semble être un compromis entre les exigences de l’ANRU en matière sécuritaire et la demande de préservation des espaces verts par les habitants. Ce choix est aussi symbolique au regard de l’histoire du quartier Hautepierre et de ses caractéristiques socio-économiques. / Strasbourg City choice of a “garden area” method of urban planning as the Urban Renewal Project (PRU) of Hautepierre area is not without questioning specialists interested in the subject. This thesis analyzes the potential resources of Hautepierre area to be reorganized into a “garden area”. This research sheds also lights on the elaborating process of the PRU, the involvement of the inhabitants, and the principal actors of this project (inhabitants, social landlords bailleurs sociaux, professionals and political representives). Evaluating the participation of Hautepierre inhabitants in the elaboration of the Urban Renovation Project (PRU) in term of capability reveals that there is no real active participation of these inhabitants. The “garden area” appears as a compromise between the National Urban Renewal Agency (ANRU) security requirements and the demand made by the inhabitants to preserve green areas. This choice is also symbolic in regard to the history of Hautepierre area and its socio-economic caracteristics.
2

Aproximações para DCT via pruning com aplicações em codificação de imagem e vídeo

COUTINHO, Vítor de Andrade 23 February 2015 (has links)
Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-06-21T15:14:55Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Vitor_de_Andrade_Coutinho-dissertacao_ppgee.pdf: 3622975 bytes, checksum: 01a22e0302dfc1890d745c6b1bffe327 (MD5) / Made available in DSpace on 2016-06-21T15:14:56Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Vitor_de_Andrade_Coutinho-dissertacao_ppgee.pdf: 3622975 bytes, checksum: 01a22e0302dfc1890d745c6b1bffe327 (MD5) Previous issue date: 2015-02-23 / CNPq / O presente trabalho aborda o desenvolvimento de aproximações para a transformada dis- reta do osseno (DCT) utilizando a abordagem pruning. Devido à propriedade da ompa ta- ção de energia, a DCT é empregada em diversas apli ações de ompressão de dados. Embora algoritmos rápidos permitam omputar a DCT e ientemente, operações de multipli ação são inevitáveis. Devido a res ente demanda por métodos de baixo onsumo energéti o, novos algoritmos de usto omputa ional reduzido são ne essários. Neste ontexto, aproximações para a DCT foram propostas nos últimos anos. Tais aproximações permitem algoritmos livres de multipli ação, sem a ne essidade de operações de ponto utuante, mantendo o desempe- nho de ompressão omparável ao forne ido por métodos baseados na DCT. Uma abordagem adi ional para reduzir o usto omputa ional da DCT é a utilização de pruning. Tal té ni a onsiste em não onsiderar oe ientes dos vetores de entrada e/ou saída que apresentam menor relevân ia em termos de energia on entrada. No aso da DCT, esses oe ientes são os termos de mais alta frequên ia do vetor transformado. A apli ação de pruning a aproxima- ções para a DCT é uma área pou o explorada. O objetivo deste trabalho é apli ar a té ni a a diferentes métodos aproximados para a DCT. As transformações resultantes foram apli adas no ontexto de ompressão de imagem e vídeo e os resultados mostraram desempenho ompa- rável ao de métodos exatos a um usto omputa ional bastante reduzido. Uma generalização do on eito é apresentada, assim omo uma análise da omplexidade aritméti a. / This work introdu es approximate dis rete osine transforms (DCT) based on the pruning approa h. Due to the energy ompa tion property, the DCT is employed in several data ompression appli ations. Although fast algorithms allow an e ient DCT omputation, multipli ation operations are inevitable. Due to the in reasing demand for energy e ient methods, new algorithms with redu ed omputational ost are required. In this ontext, DCT approximations have been proposed re ently. Su h approximations allow multipli ation free algorithms whi h an avoid oating point operations, while maintaining a ompetitive performan e. A further approa h to redu e the omputational ost of the DCT is pruning. The te hnique onsists of dis arding input and/or output ve tors oe ients whi h are regarded as less signi ant. In the ase of the DCT, su h oe ients are output oe ients asso iated to higher frequen y terms. Pruned DCT approximations is a relatively unexplored eld of resear h. The obje tive of this work is the ombination of approximations and pruning to derive extremely low- omplexity DCT approximations. The resulting methods were applied in the image and vídeo ompression s enario and results showed omparative performan e with exa t methods at a mu h lower omputational omplexity. A qualitative and quantitative omparison with a omprehensive list of existing methods is presented. A generalization of the pruning on ept is presented.

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