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Scope and Contents: The first chapter of this thesis consists of a general introduction and a brief description of previous work done in this same laboratory. Also included is a preliminary description of the present experiment. This is followed, in Chapter 2, by a detailed description of the experimental apparatus. The third and last chapter contains a description of the procedure used in obtaining results, as well as the results themselves. Measurements were made of the diffraction patterns of a plastic prism, and five rods in a total of nine different cases. In all cases, the intensity measurements were made along the axis of propagation of the incident beam behind the diffracting object. A polarization normal to the axis of the rods was used. Theoretical calculations were made in three cases, and compared with the experimental results. / Thesis / Master of Science (MS)

This thesis aims at presenting the Discrete Vortex Method (DVM) as a tool to determine the flow field and associated wind loads over structures. Two structures are considered: the first is a surface-mounted prism and is used to simulate wind loads over low-rise structures. The second is a bridge section with attached flaps that can be oriented to vary the moment coefficient. Advantages and disadvantages of using DVM for these applications are discussed. For the surface-mounted prism, the results show that the developed code correctly predicts the flow separation around the corners. As for the surface pressures, it is concluded that parallel processing, which could be easily implemented for DVM, should be used to correctly predict surface pressures and their variations. This is due to the required slow time advancement of the computations. The results on attaching flaps to bridge sections yield required orientations to minimize moments under different angles of attack. / Master of Science

Made available in DSpace on 2015-03-26T13:28:11Z (GMT). No. of bitstreams: 1 texto completo.pdf: 4625552 bytes, checksum: 1d78a0ca99fd5b13dc90107ef8ea9c3e (MD5) Previous issue date: 2012-06-22 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This study aims to evaluate the altimetric accuracy of Digital Surface Models - DSM and generation of a DSM composed using scene taken by PRISM Sensor - Panchromatic Remote Sensing Instrument for Stereo Mapping (viewing directions Backward, Forward and Nadir) which is located aboard the ALOS satellite (Advanced Land Observing Satellite). The Toutin Model is used to perform on the realization of geometric correction of images, were that took into account the influence of the number of control points and tie points for generation of DSMs. There were generated 54 models divided into four tests which look forward to determinate the minimum number of tie points to be used for the generation of DSM (test 01), the adequacy of the methodology proposed by IBGE (2009) for the region studied, whose relief has different characteristics employed by this agency (test 02), the influence of increasing the number of control points on the altimetric quality DSMs (test 03) and the effect of the combination of the three viewing directions behavior and the use of different strategies of correlation between images and spatial resolution of the models in the final products accuracy (test 04). The DSM derived from each test were evaluated by use of the Decree-Law 89.817/1984 and those which recieved better ratings were submitted to a local analysis, where it was investigated the behavior of the altitude values using the PEC for an area located in Viçosa and a empirical analysis was employed, in order to verify the behavior of pixels located regions that had shades of vegetation and cloud shadows using for that the correlation coefficient of epipolar pairs generated for each DSM besides conducting analysis of the effects of slope on the quality altimetric using as base the correlation coefficient. The DSMs that showed better results after the use of all these tests were used for the orthorectification of the Nadir scene and orthoimages, were evaluated globally using the PEC and the local way, in order to verify the influence of radiometric resolution on the vectorization of orthoimage. The DSM used for orthorectification also underwent a final examination, which took place a refinement in their altitude values by employing the Koppe s Formula modified by Kraus (2004) that takes into account the influence of slope and the scale factor when taken on the scenes of aerial images which led to a Composed DSM consisted of all pixels that presented a lower standard deviation. The results revealed that the PRISM sensor allows to obtain DSMs of consistent standards for the National Mapping Scale 1:25.000, with the need to use a minimum number of seven control points associated with twelve tie points and use of viewing directions Backward x Nadir for the generation of models. The increase in the number of control points to perform the correction using the geometric Toutin model did not bring significant improvements to the quality of altimetric DSMs evaluated, although they showed the best results were those that used 60 control points in their generation. The methodology proposed by IBGE (2009) proved to be applicable to regions with similar characteristics to those studied in this work, although there is a need for testing in areas with similar characteristics studied. Using the Koppe s Formula modified was satisfactory, allowing to associate in a single DSM the lowest indicative altimetric errors found for the altimetric component, and the results were superior to the other models evaluated. The orthoimages obtained are classified in Class A of the Decree-Law for the scale of 1:25.000, however due to the low radiometric resolution of the scenes PRISM (8 bits) the extraction process of physical elements, especially in urban areas, become difficult to interpret. / O presente trabalho tem como objetivo a avaliação da acurácia altimétrica de Modelos Digitais de Superfície (MDSs) e geração de MDSs compostos, utilizando a cena tomada pelo Sensor PRISM - Panchromatic Remote Sensing Instrument for Stereo Mapping no modo triplet (visadas Backward, Nadir e Forward) que se encontra a bordo do Satélite ALOS (Advanced Land Observing Satellite). Para realização da Correção Geométrica das imagens foi empregado o Modelo de Toutin. Foram gerados 54 MDSs divididos em quatro testes, que procuraram verificar o número mínimo de pontos de ligação a serem utilizados para geração de cada MDS, a adequação da Metodologia proposta por IBGE (2009) a uma região, cujo relevo possui características diferentes da estudada por este órgão, a influência do aumento do número de pontos de controle na qualidade altimétrica dos MDSs e a combinação das três visadas associadas ao uso de diferentes estratégias de correlação entre imagens e resolução espacial dos modelos. Os MDSs resultantes de cada teste foram avaliados através do emprego do Decreto-Lei 89.817/1984 que institui o Padrão de Exatidão Cartográfica PEC e aqueles que obtiveram melhor classificação foram submetidos a uma análise local, onde se verificou o comportamento dos valores de altitude empregando o PEC para uma área situada no município de Viçosa, bem como realizada uma análise empírica, com a finalidade de verificar o comportamento dos pixels situados em regiões que apresentavam sombras da vegetação e sombras de nuvens, utilizando para isso, o coeficiente de correlação dos pares epipolares gerados para cada MDS, além da realização de análise dos efeitos da inclinação do terreno sobre a qualidade altimétrica tomando como base o coeficiente de correlação. Os MDSs que apresentaram melhores resultados após emprego dos quatro testes foram utilizados para a ortorretificação da cena Nadir e as Ortoimagens resultantes foram avaliadas de maneira global empregando o PEC e de maneira local, onde verifIcou-se a influência da resolução radiométrica na vetorização da Ortoimagem. A última análise consistiu na realização de um refinamento nos valores de altitude dos MDSs que apresentaram melhor classificação, através do emprego da Fórmula de Koppe modificada por Kraus (2004), que leva em consideração a influência da declividade e do fator de Escala sobre as cenas quando tomadas de imagens aéreas. Esta Fórmula foi adaptada para uso em uma imagem orbital e utilizada no intuito de se obter um indicativo da localização do erro altimétrico sobre cada MDS, onde se gerou um novo modelo, denominado MDS Composto. Os resultados obtidos permitiram constatar que o sensor PRISM permite a obtenção de MDSs compatíveis as normas da Cartografia Nacional para a Escala de 1:25.000, havendo a necessidade de utilização de um número mínimo de sete pontos de controle associados a doze pontos de ligação e o uso das visadas Backward x Nadir (que apresentaram os melhores resultados) para a geração dos Modelos. O aumento do número de pontos controle para realização da correção geométrica empregando o Modelo de Toutin não trouxe melhorias significativas aos MDSs avaliados, embora os que apresentaram melhores resultados foram aqueles que utilizaram 60 pontos de controle em sua geração. A Metodologia proposta por IBGE (2009) se mostrou aplicável a regiões com características semelhantes à estudada neste trabalho, embora exista a necessidade de realização de testes em áreas com características semelhantes à estudada. O uso da Fórmula de Koppe modificada se mostrou satisfatório, permitindo associar em um único MDS os valores de altitude que apresentam o menor indicativo de erro encontrado para a componente altimétrica, sendo que os resultados obtidos através do emprego desta Equação foram superiores aos demais Modelos avaliados. As ortoimagens obtidas se enquadraram na Classe A do PEC para a escala de 1:25.000, contudo devido à baixa resolução radiométrica das cenas PRISM (8 bits) o processo de extração de elementos físicos, principalmente em áreas urbanas tornaram-se de difícil interpretação.

The aim of this diploma thesis is to analyse and compare Harper Lee's canonical coming-of- age novel To Kill a Mockingbird to its original forerunner, the novel Go Set a Watchman, which was, however, published several years later. The theoretical part provides a brief synopsis of each of the novels and outlines Lee's life, as well as the main aspects of the historical and social background relevant to the stories, namely the Great Depression, Jim Crow laws, and the Scottsboro Trial. The practical part then investigates and juxtaposes the two novels from thematic and structural perspectives, and considers them specifically through the psychological, sociological, and stylistic prisms. Besides, it compares the factual similarities and differences in storylines and characters, who are often based on Lee's real-life acquaintances. The overall comparison shows how To Kill a Mockingbird, a gently tuned novel of children growing up yet packed with diverse topics, evolved from a rather intricate novel, Go Set a Watchman, dealing with a difficult task of one's individuation and realising that one's father is only a human. To Kill a Mockingbird is set in the 1930s and takes place over several years, while the story of Go Set a Watchman is situated some twenty years later, and its plot culminates in the...

The aim of this diploma thesis is to analyse and compare Harper Lee's canonical coming-of- age novel To Kill a Mockingbird to its original forerunner, the novel Go Set a Watchman, which was, however, published several years later. The theoretical part provides a brief synopsis of each of the novels and outlines Lee's life, as well as the main aspects of the historical and social background relevant to the stories, namely the Great Depression, Jim Crow laws, and the Scottsboro Trial. The practical part then investigates and juxtaposes the two novels from thematic and structural perspectives, and considers them specifically through the psychological, sociological, and stylistic prisms. Besides, it compares the factual similarities and differences in storylines and characters, who are often based on Lee's real-life acquaintances. The overall comparison shows how To Kill a Mockingbird, a gently tuned novel of children growing up yet packed with diverse topics, evolved from a rather intricate novel, Go Set a Watchman, dealing with a difficult task of one's individuation and realising that one's father is only a human. To Kill a Mockingbird is set in the 1930s and takes place over several years, while the story of Go Set a Watchman is situated some twenty years later, and its plot culminates in the...

Visuell kommunikation är en stark marknadsföringsstrategi för att exponera ett varumärkes identitet därav är sociala medier är därför en väsentlig marknadsföringsplattform för att förstärka varumärkets distinkta idé om deras identitet. Den visuella interaktionen från varumärket genererar skapandet av tankar, kopplingar och minnesvärda upplevelser för konsumenterna som kommer påverka deras relation till varumärket. Studien granskar därför inledningsvis hur tre modeföretag belyser sina varumärkesidentitet genom sin marknadsföring på Instagram genom en semiotisk analys som studerar tecken av bakomliggande meningar och betydelser. Varumärken som marknadsför sig på sociala medier når en publik som sträcker sig globalt och därför är det essentiellt att distribuera en relevant varumärkeskultur som ska anpassa sig efter varje lands kultur vilket visar sig vara ett område som är en utmaning för varumärken. Därför granskar studien dessutom hur modeföretagens identitet uppfattas av konsumenter utifrån interaktioner och reaktioner via kommentarsfältet. Studiens resultat kopplas samman med Kapferer´s brand identity prism tillsammans med resterande begrepp från teoretiska referensramen. / This research reviews three fashion companies and how they shed light on their brandidentity through their marketing on Instagram. This will be done through a semiotic analysis thatstudies signs of underlying meanings and the study is based on a theoretical frame of reference withKapferer identity prism. The results of the study are linked to Kapferer's brand identity prism togetherwith the remaining concepts from the theoretical frame of reference. The brands are analyzed separately.

[pt] A colaboração entre stakeholders em operações humanitárias e de desastres é relevante pela sua capacidade de reduzir custos e aumentar a velocidade das operações de resposta que minimizam o impacto e sofrimento da população. Assim, a tese visa propor um framework integrado para discutir estratégias de colaboração na resposta a desastres, o qual é composto pela identificação dos principais stakeholders, seus desejos e necessidades, e os processos de resposta a desastres. O primeiro modelo se refere à representação dos 10 principais stakeholders, a saber: governo, militar, legislativo e regulatório, setor privado, fornecedor direto, mídia, rede de ajuda local, doador, rede de ajuda internacional, e beneficiário. O segundo resultado se refere ao detalhamento das satisfações desses stakeholders, além das satisfações partilhadas por grande parte deles. O terceiro modelo se refere aos processos de resposta a desastres detalhados em 10 processos de nível 1 e 74 processos de nível 2. O framework integrado combina as sínteses de cada uma das três revisões sistemáticas da literatura anteriores, tendo a dimensão de estratégia como central para a discussão da colaboração, e utilizado como referência em um estudo de caso a fim de conferir validade externa ao framework. O estudo de caso toma a perspectiva do stakeholder militar, comparando o referencial teórico com a resposta aos deslizamentos da Região Serrana do Rio de Janeiro em 2011 e com a situação atual de resposta a desastres de um simulado realizado em 2017. Os resultados contribuem com a classificação da literatura existente, sínteses e proposição de modelos, e uma agenda de pesquisa. Por fim, sugere-se como pesquisas futuras a extensão da pesquisa para os estágios de mitigação, preparação e recuperação, e a ampliação da validade externa do framework. / [en] The collaboration between stakeholders in disaster and humanitarian operations is relevant due to their ability to reduce costs and increase the speed of response operations that minimize the impact and suffering of the population. Thus, the thesis aims to propose an integrated framework to discuss strategies of collaboration in the disaster response, which is composed of the identification of the main stakeholders, their wants and needs, and the disaster response processes. The first model refers to the representation of the 10 main stakeholders, namely: government, military, legislative and regulatory, private sector, direct supplier, media, local aid network, donor, international aid network, and beneficiary. The second result refers to the detailing the satisfaction of these stakeholders, as well as the satisfactions shared by most them. The third model refers to disaster response processes detailed in 10 processes of level 1 and 74 processes of level 2. The integrated framework combines the three syntheses from each of the previous systematic literature reviews, having the strategy as central dimension for the discussion of collaboration, and used as reference in a case study in order to give external validity to the framework. The case study takes the perspective of the Military stakeholder, comparing the theoretical reference with the response to the landslides of the Mountain Region of Rio de Janeiro state in 2011 and the current situation of response to disasters from a simulation carried out in 2017. The results contribute to the classification of existing literature, synthesis and proposition of models, and a research agenda. Finally, it is suggested as future research the extension to the stages of mitigation, preparation and recovery, and the extension of the external validity of the framework.

Several novel techniques for controlling, managing and utilizing high power diode lasers are described. Low pressure water spray cooling for a high heat flux system is developed and proven to be an ideal cooling method for high power diode laser arrays. In order to enable better thermal and optical performance of diode laser arrays, a new and simple optical element, the beam control prism, is invented. It provides the ability to accomplish beam shaping and beam tilting at the same time. Several low thermal resistance diode packaging designs using beam control prisms are proposed, studied and produced. Two pump cavity designs using a diode laser array to uniformly pump rod shape gain media are also investigated.

A description of several experiments carried out to study the existence of evanescent waves behind totally reflecting dielectric surfaces is given in this thesis. Chapter I describes the experimental apparatus used to generate and measure the electromagnetic radiation. A detailed description of the construction of the radiating horns used and the casting of a plastic prism is also given. Chapters II and III give the results of two experiments in the region behind a totally reflecting face of the plastic prism and similar effects noted behind a lucite semicylinder with its plane face towards the source of radiation. Near field diffraction patterns of this cylinder with its plane face towards the source, away from the source, and parallel to the axis of radiation are also given. The above three cases are compared with results obtained by coating the semicylinder with aluminum foil. / Thesis / Master of Science (MSc)