Diss. (sammanfattning) Uppsala : Uppsala universitet, 2005. / Härtill 4 uppsatser.

Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 309-318). Available also in a digital version from Dissertation Abstracts.

Thesis (M.S.)--Rochester Institute of Technology, 2008. / Typescript. Includes bibliographical references (leaves 73-75).

University, Diss., 2003--Tübingen.

A presente Dissertação propôs a interação - por meio da criação artística - entre dois grupos de crianças, residentes em Porto Alegre-RS e Cumuruxatiba-BA. A pesquisa de campo consistiu na realização de 12 encontros em Porto Alegre e 10 encontros em Cumuruxatiba realizados entre os meses de junho a dezembro de 2014. O estudo buscou compreender as visões que as crianças produziram sobre si e sobre o outro a partir da correspondência estabelecida pelos grupos. Neste contexto, o principal objetivo do trabalho constou em analisar as possibilidades de criação e de invenção de si mesmo na interação com crianças de um contexto distante. Esta pesquisa discute o deslocamento e o encontro com a alteridade como proposições metodológicas no ensino da arte. Problematizam-se neste trabalho os conceitos de alteridade e deslocamento a partir de Bakthin, Foucault e Onfray; o conceito de infância a partir de Larrosa, Kristeva e Kohan e as proposições artísticas de caráter colaborativo a partir de Bourriaud e Laddaga. Como eixo metodológico, apresenta projetos e obras de artistas e educadores contemporâneos. Dentre os elementos centrais de análise, estão a relação de alteridade e estranhamento a partir da qual as crianças modificam a relação de si para si mesmo e de si para o outro por meio do olhar. A partir destes elementos a experiência estética é apresentada como meio de reconstrução do entendimento do outro. / This Dissertation proposed interaction - through artistic creation - between two groups of children, one living in Porto Alegre-RS and the other living in Cumuruxatiba, Bahia. The field research consisted of 12 meetings in Porto Alegre and 10 meetings in Cumuruxatiba carried out between the months of June and December 2014. The study sought to understand the visions that children produce about themselves and each other from the established correspondence by the groups. In this context, the main objective of the study consisted in analyzing the possibilities of creation and invention of oneself throug interaction with children from a distant context. This research also discusses the displacement and the encounter with otherness as methodological propositions in art education. To problematize in this work the concepts of otherness and displacement from Bakhtin, Foucault and Onfray; the concept of childhood from Larrosa, Kristeva and Kohan and artistic propositions collaborative character from Bourriaud and Laddaga. As a methodological line, the research presents projects and works of contemporary artists and educators. Among the central elements of analysis, are otherness relationship and estrangement from which children change the relation of himself to himself and of himself to the other through the use of the vision. From these elements aesthetic experience is presented as a means for reconstruction of THE understanding of the other (OTHERNESS?).

A presente Dissertação propôs a interação - por meio da criação artística - entre dois grupos de crianças, residentes em Porto Alegre-RS e Cumuruxatiba-BA. A pesquisa de campo consistiu na realização de 12 encontros em Porto Alegre e 10 encontros em Cumuruxatiba realizados entre os meses de junho a dezembro de 2014. O estudo buscou compreender as visões que as crianças produziram sobre si e sobre o outro a partir da correspondência estabelecida pelos grupos. Neste contexto, o principal objetivo do trabalho constou em analisar as possibilidades de criação e de invenção de si mesmo na interação com crianças de um contexto distante. Esta pesquisa discute o deslocamento e o encontro com a alteridade como proposições metodológicas no ensino da arte. Problematizam-se neste trabalho os conceitos de alteridade e deslocamento a partir de Bakthin, Foucault e Onfray; o conceito de infância a partir de Larrosa, Kristeva e Kohan e as proposições artísticas de caráter colaborativo a partir de Bourriaud e Laddaga. Como eixo metodológico, apresenta projetos e obras de artistas e educadores contemporâneos. Dentre os elementos centrais de análise, estão a relação de alteridade e estranhamento a partir da qual as crianças modificam a relação de si para si mesmo e de si para o outro por meio do olhar. A partir destes elementos a experiência estética é apresentada como meio de reconstrução do entendimento do outro. / This Dissertation proposed interaction - through artistic creation - between two groups of children, one living in Porto Alegre-RS and the other living in Cumuruxatiba, Bahia. The field research consisted of 12 meetings in Porto Alegre and 10 meetings in Cumuruxatiba carried out between the months of June and December 2014. The study sought to understand the visions that children produce about themselves and each other from the established correspondence by the groups. In this context, the main objective of the study consisted in analyzing the possibilities of creation and invention of oneself throug interaction with children from a distant context. This research also discusses the displacement and the encounter with otherness as methodological propositions in art education. To problematize in this work the concepts of otherness and displacement from Bakhtin, Foucault and Onfray; the concept of childhood from Larrosa, Kristeva and Kohan and artistic propositions collaborative character from Bourriaud and Laddaga. As a methodological line, the research presents projects and works of contemporary artists and educators. Among the central elements of analysis, are otherness relationship and estrangement from which children change the relation of himself to himself and of himself to the other through the use of the vision. From these elements aesthetic experience is presented as a means for reconstruction of THE understanding of the other (OTHERNESS?).

In this dissertation, I establish a theoretical and empirical critique of modern forms of environmentally sustainable technology. Theoretically, I critique the application of environmentally sustainable technologies in modern capitalist economies using the treadmill of production theory and metabolic rift theory. I also expand on these theories by developing an analytical concept – the displacement paradox. The displacement paradox refers to a counterintuitive phenomenon, where green technologies expand rather displace traditional production processes. Empirically, I assess the assumptions of the displacement paradox by analyzing the relationship between organic farming and agrochemical application, organic farming and greenhouse gas emissions, organic farming and water pollution, and alternatively fueled vehicles and total fuel consumption per vehicle. In each of these cases, I find that green technology (in the form of organic farming and alternatively fueled vehicles) is not displacing traditional production processes, and instead expanding alongside them. I argue that these findings are a result of the broader socioeconomic structure that green technology is produced under. Specifically, I contend that because current socioeconomic systems are established around traditional production processes, to substantially reduce environmental degradation, green technologies must operate as a social and technological counterforce to traditional production processes. Currently, the green technologies explored in this dissertation act as a technological alternatives to traditional production processes, making them commodities that sustain the current structure of social relations, as opposed to social and technological counterforces to environmentally hazardous forms of production. I conclude that in order for green technologies to successfully reduce environmental degradation, they must be established under social conditions that support their use over traditional production processes.

In this thesis Direct Numerical Simulation (DNS) is used to investigate the development of turbulent premixed flame kernels during the early stages of growth typical of the period following spark ignition. Two distinct aspects of this phase are considered: the interaction of the expanding kernel with a field of decaying turbulence, and the chemical and thermo-diffusive response of the flame for different fresh-gas compositions. In the first part of the study, three-dimensional, repeated simulations with single-step chemistry are used to generate ensemble statistics of global flame growth. The surface-conditioned mean fluid-velocity magnitude is found to vary significantly across different isosurfaces of the reaction progress variable, and this is shown to lead to a bias in the distribution of the Surface Density Function (SDF) around the developing flame. Two-dimensional simulations in an extended domain indicate that this effect translates into a similar directional bias in the Flame Surface Density (FSD) at later stages in the kernel development. Properties of the fresh gas turbulence decay are assessed from an independent, non-reacting simulation database. In the second part of this study, two-dimensional simulations with a detailed 68-step reaction mechanism are used to investigate the thermo-diffusive response of pure methane-air, and hydrogen-enriched methane-air flames. The changes in local and global behaviour due to the different laminar flame characteristics, and the response of the flames to strain and curvature are examined at different equivalence ratios and turbulence intensities. Mechanisms leading to flame quenching are discussed and the effect of mean flame curvature is assessed through comparison with an equivalent planar flame. The effects of hydrogen addition are found to be particularly pronounced in flame kernels due to the higher positive stretch rates and reduced thermo-diffusive stability of hydrogen-enriched flames.

Made available in DSpace on 2014-06-11T19:22:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-03-30Bitstream added on 2014-06-13T18:08:14Z : No. of bitstreams: 1 demarqui_en_me_prud.pdf: 4998562 bytes, checksum: 5482d66ba7d8db635205618558aeb138 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho propõe uma metodologia monoscópica para a determinação automática da altura de edifícios em fotografias aéreas digitais, baseando-se no deslocamento radial dos pontos projetados no plano imagem e na geometria formada no momento de obtenção da fotografia aérea. O conhecimento da altura de edifícios pode ser utilizado para a modelagem da superfície em áreas urbanas, estudos para a instalação de antenas de transmissão de sinais, planejamento de rotas para aeronaves, geração de true-orthophoto etc.. A metodologia emprega um conjunto de etapas para a detecção das bordas dispostas radialmente em relação ao sistema de coordenadas fotogramétrico, sendo que estas bordas representam as arestas laterais dos edifícios registradas na fotografia. Na primeira etapa realiza-se a redução do espaço de busca através da detecção das sombras projetadas pelos edifícios, gerando sub-imagens das áreas no entorno de cada sombra detectada. Na seqüência, é realizada a extração de bordas e conexão dos pixels destas sub-imagens. As bordas são analisadas individualmente para identificar qual par, dentre os pontos que compõem a borda, melhor corresponde aos extremos da aresta lateral do edifício. Os critérios utilizados para a seleção dos pares de pontos são os seguintes: análise do coeficiente linear da equação da reta formada pelo par de pontos; distância entre os pontos; e grau de sobreposição com a borda rotulada. Deste modo, a partir da seleção das arestas laterais, assim como o conhecimento da altura de vôo, são calculadas as alturas destes edifícios. Os resultados alcançados nos testes realizados com imagens reais se mostraram promissores para a identificação das arestas e cálculo da altura de edifícios. / This work proposes an automatic extraction of buildings height in digital images through a monoscopic methodology. Surface modeling of urban areas planning of aircraft routes, true-orthophoto and so on, can be performed by knowing the buildings heights. In photographs taken from an aircraft the buildings edges appear as radial lines due to the relief displacement, which occurs radially from the principal point. The first step of the methodology consists on the sub-images creation with the aim to reduce the search space on image. Thus, its used a shadows extraction procedure, by selecting only those with the biggest area (projected at ground) according to threshold. The edge extraction and pixels connection are performed for each sub-image produced and analyzed individually in order to identify if they belong to a building. The adopted criteria are based on the linear coefficient of straight line, the distance and the overlapping degree with regard to the labeled edge. With the lateral edges selected and the knowledge of the flight height, the buildings heights can be calculated. The experimental results obtained with real images show that the proposed approach is suitable to perform the automatic identification of the buildings height in digital images.

The aim of this project was to design, construct and develop a space frame for a pneumatically driven vehicle for one driver through several simulations. The purpose of the vehicle was to compete in the ‘XI. International Aventics Pneumobile Competition’. This event is an opportunity for students to develop and improve their skills in different fields such as mechanical engineering, telemetry and electronics building and team working. However, this thesis topic will be focused mainly on the aspects of mechanical engineer based on the process of before and after the construction. This process was also examined through a number of races occurred during the competition. Specifically, the chassis that has been initially designed was developed through the whole process with purpose of lowering the mass while maintaining the strength. The study has produced two results - a real life model, which has participated in the competition and an improved model of the frame which was carried out in Autodesk Inventor and ADAMS software. Throughout the process the frame was remodeled and resulted with the weight loss from 48.3 kg to 31.9kg, while the strength was maintained. / XI. International Aventics Pneumobile Competition