A análise de imagens automatizada tem atualmente importante papel no setor mineral, devido à rapidez das análises e à confiabilidade dos resultados. A técnica pode ser realizada por meio de imagens adquiridas em microscópio eletrônico de varredura, geralmente associada a microanálises químicas por EDS. Estas analises podem ser realizadas em diversas etapas de um empreendimento mineiro: no auxílio à exploração, lavra (blendagens), processos de beneficiamento (associação mineral), estudos de gênese e controles de mineralização. Essa técnica permite a análise estatística de grande número de partículas/dados, fornecendo informações de composição mineralógica, química mineral, partição de elementos, associações minerais incluindo liberação de fases de interesse, entre outros. Este estudo investiga a aplicabilidade da análise de imagens automatizada em amostras de minério de ferro, com base em diferentes procedimentos de preparação de amostras e rotinas de análise avaliadas por meio do sistema MLA. Um minério de ferro foi escolhido por se tratar de um minério já bastante estudado e bem documentado na bibliografia e que mostra, em geral, mineralogia e texturas simples e repetitivas facilitando a análise dos resultados obtidos com os diferentes procedimentos e rotinas aplicadas. Além disso, o minério de ferro apresenta fases minerais com significativas diferenças de peso específico, o que pode acarretar em maiores dificuldades em termos de amostragem e preparação de amostras. / The automated image analysis has an important role in the mineral industry due to the quickly analysis and the results reliability. The technique can be applied using images from a scanning electron microscope associated usually coupled with chemical microanalysis from an EDS system. These analyses are carried out in many stages of a mining project helping mineral exploration, mining (blending), mineral processing (mineral association), genetic studies and mineralization control. This technique allows a statistic analysis of a large numbers particles and data, providing information of mineralogical composition, mineral chemistry, elemental distribution, mineral associations, phase and spectra liberation and others. This study sets the applicability of automated image analysis of an iron ore sample with diverse preparation procedures and analysis routines, which were evaluated by the MLA system. An iron ore sample was chosen because it is a familiar and well-documented ore in the literature, that usually shows simple textures and mineralogy which makes easier the interpretation of results by a diversity of preparation procedures and analysis routines. Furthermore, the iron ore shows mineral phases with significant differences in specific gravity resulting in more difficulties in sampling and preparation procedures due to potential density segregation.

Li, Xiang. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 161-184). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract and appendix also in Chinese.

Made available in DSpace on 2017-07-21T19:26:07Z (GMT). No. of bitstreams: 1 Sabrina Passoni.pdf: 6849418 bytes, checksum: 548846a6a7358d6de92338d9345d4f38 (MD5) Previous issue date: 2013-07-31 / The X-ray computed microtomography (CT) represents a non-invasive technique that can be used with success to analyze physical properties by the soil scientists without destroying the structure of the soil. The technique has as advantage over conventional methods the characterization of the soil porous system in three dimensions, which allow morphological property analyses such as connectivity and tortuosity of the pores. However, as the soil is a non-homogeneous and complex system, the CT technique needs specific methodologies for digital image processing, mainly during the segmentation procedure. The objectives of this work were: 1) to develop a methodology for microtomographic digital image processing; 2) to characterize the soil structure by using micromorphology analysis of samples submitted to non-tillage and conventional systems collected in three distinct layers (0-10, 10-20 and 20-30 cm); and 3) to identify possible changes in the porous system of the soil analyzed due to the effect of different management systems. The use of the CT technique and the procedures adopted for microtomographic digital image processing show to be efficient for the micromorphologic characterization of soil porous system. Soil under non-tillage system presented the best results from the agricultural point of view regarding porosity, total number of pores, connectivity and tortuosity in comparison to the conventional tillage. / A microtomografia computadorizada de raios X (μCT) é uma técnica não-invasiva, que pode ser usada com sucesso para analisar as propriedades físicas do solo pelos cientistas, sem destruir a estrutura do solo. A técnica apresenta vantagens sobre os métodos convencionais: a caracterização do sistema poroso do solo em três dimensões, a qual permite análises de propriedades morfológicas, tais como a conectividade e tortuosidade dos poros. No entanto, como o solo é um sistema não-homogêneo e complexo, a técnica de μTC necessita de metodologias específicas para o processamento de imagens digitais, principalmente durante o processo de segmentação. Os objetivos deste trabalho foram: 1) desenvolver uma metodologia de processamento digital de imagens microtomográficas; 2) caracterizar a estrutura do solo por meio de análise micromorfológica das amostras submetidas a sistemas plantio direto e plantio convencional coletadas em três camadas distintas (0-10, 10-20 e 20-30 cm) e 3), identificar possíveis alterações no sistema poroso do solo analisado, devido ao efeito de diferentes sistemas de manejo. O uso da técnica de tomografia computadorizada e os procedimentos adotados para o processamento de imagem digital microtomográfica mostrou-se eficiente para a caracterização micromorfológica do sistema poroso do solo. Os dados do solo sob sistema de plantio direto apresentou os melhores resultados do ponto de vista agrícola sobre a porosidade, o número total de poros, conectividade e tortuosidade em comparação com o plantio convencional.

Submitted by Natalie Mendes (nataliermendes@gmail.com) on 2015-07-24T23:43:40Z No. of bitstreams: 1 O LIVRO DID?TICO E AS INFLU?NCIAS IDEOL?GICAS DAS IMAGENS POR UMA EDUCA??O QUE CONTEMPLE A DIVERSIDADE SOCIAL E CULTURAL.pdf: 2415317 bytes, checksum: 2ee24983beb12a053af481fbce83f12d (MD5) / Made available in DSpace on 2015-07-24T23:43:40Z (GMT). No. of bitstreams: 1 O LIVRO DID?TICO E AS INFLU?NCIAS IDEOL?GICAS DAS IMAGENS POR UMA EDUCA??O QUE CONTEMPLE A DIVERSIDADE SOCIAL E CULTURAL.pdf: 2415317 bytes, checksum: 2ee24983beb12a053af481fbce83f12d (MD5) Previous issue date: 2014-03-31 / Funda??o de Amparo ? Pesquisa do Estado da Bahia - FAPEB / This study presents an interdisciplinary dialogue between the Education and Design areas, in which, this latter is understood as language and knowledge, here means an image. The aim is to support educators in understanding and addressing the imagistic content of textbooks, especially, the History books which are used in the 5th grade of the Elementary School, because they present the principles of social and cultural construction of our nation and were indicated by the PNLD through the Textbook Guide, 2010-2012 triennium, to be adopted in the Brazilian public education. It is believed the pedagogical importance of image and its contribution to work the imaginary, memory and identification of social and cultural elements, and its capacity to transmit contents, codes, signs and meanings, converted into discourses that dissimulate power relations, stereotypes and prejudices, in a relation of not alterity and disrespect to the differences. In this aspect, the objective of the study is to identify and analyze ideological conceptions that denote racism, stereotypes, prejudice, and discrimination against the black people, in the images of the History books of the 5th year of elementary school, used in public education. Three textbooks, Hist?ria Projeto Pitangu?, Hist?ria Projeto Buriti and Hist?ria, Bahia, were selected, and in these materials, four images of authors, like Debret, Spix and Martius, Rugendas and Guillobel, were chosen in the units concerning to the Colonization and the Regency period, because they are repeatedly the same used in History textbooks, when they refer to the socio-cultural issues of the black people. For the analysis of these images was adopted the qualitative methodology, associated with the iconographic method of Image Analysis, by Erwin Panofsky, and the Discourse Analysis method, from the line that was founded by Michael P?cheux, which enables the reflection about the composition of these images and the multiplicity of meanings they unveil. This study contributes to the debate about the importance of the interdisciplinary dialogue in the understanding of the printed visual representations in the textbook, which can externalize discriminatory conceptions that need to be elucidated and deconstructed. It was concluded that, despite the many struggles and considerations undertaken by the black social movements and the Academy, these books still have been reproducing and disseminating ethnocentric ideological conceptions that need to be eradicated in the seek for the construction of a truly equal and just society. / Este estudo prop?e um di?logo interdisciplinar entre os campos da Educa??o e do Desenho, este ?ltimo, compreendido como linguagem e conhecimento, aqui se traduz enquanto imagem. Busca-se subsidiar educadores na compreens?o e no trato do conte?do imag?tico de livros did?ticos, principalmente, os de Hist?ria utilizados no 5? ano do Ensino Fundamental, pois os mesmos trazem os princ?pios da constru??o social e cultural da nossa na??o e foram indicados pelo PNLD por meio do Guia do Livro Did?tico, tri?nio 2010-2012, para serem adotados na rede p?blica de ensino brasileira. Acredita-se na import?ncia pedag?gica da imagem e sua contribui??o para se trabalhar o imagin?rio, a mem?ria e a identifica??o de elementos sociais e culturais, e na sua capacidade de transmiss?o de conte?dos, c?digos, signos e significados, convertidos em discursos que dissimulam rela??es de poder, estere?tipos e preconceitos, em uma rela??o de n?o alteridade e de desrespeito as diferen?as. Nesse aspecto, o objetivo do estudo ? identificar e analisar concep??es ideol?gicas que denotam racismo, estere?tipos, preconceitos, e discrimina??o em rela??o ao povo negro, nas imagens de livros de Hist?ria do 5? ano do Ensino Fundamental, utilizados na rede p?blica de ensino. Foram selecionados tr?s livros did?ticos, Hist?ria Projeto Pitangu?, Hist?ria Projeto Buriti e Hist?ria, Bahia e destes, nas unidades referentes ao per?odo da Coloniza??o e da Reg?ncia, quatro imagens, dos autores Debret, Spix e Martius, Rugendas e Guillobel, foram selecionadas, por serem as mesmas recorrentemente utilizadas em livros did?ticos de hist?ria quando se trata de quest?es s?cio-culturais do povo negro. Para o trato dessas imagens foi adotada a metodologia qualitativa associada ao m?todo iconogr?fico de An?lise de Imagens, de Erwin Panofsky, e ao m?todo de An?lise de Discurso, da linha fundada por Michael P?cheux de modo a refletir sobre a composi??o dessas imagens e a multiplicidade de sentidos que elas desvelam. Este estudo contribui para a reflex?o sobre a import?ncia do di?logo interdisciplinar na compreens?o das representa??es visuais impressas no livro did?tico, que podem exteriorizar concep??es discriminat?rias e que precisam ser desvendadas e desconstru?das. Conclui-se que, n?o obstante as muitas lutas e reflex?es empreendidas pelos movimentos sociais negros e pela academia, esses livros ainda hoje reproduzem e disseminam concep??es ideol?gicas etnoc?ntricas que precisam ser erradicadas na busca pela constru??o de uma sociedade realmente justa e igualit?ria.

This thesis is about how high level brands communicate their brands to the audience. The thesis consists of analyses of the identity and images of two luxury brands, Gucci and Burberry and two premium brands, Lacoste and Morris. The purpose is to clarify the identity of the brands, by carrying out analysis as well as interviews with key personnel. Furthermore there is an analysis of the advertisement images for the respective brands in order to clarify the brands images. Finally there is an analysis of the alleged conformity between identity and image and also a section about the luxury and premium brand differs, or rather not differ from each other in the identity-image connection. The methods used are Aakers identity system, to establish the respective brands identity. An image analysis with inspiration from Panfosky and leading semoticians are also used to scrutinize the advertising images from the Spring/Summer 2010 campaigns. The results show that there is indeed a good conformation among the brands when it comes to the identity-image connection. The brands identities are thorough and well articulated and the advertisement images are well executed with the identity well in mind which makes for that the campaigns are contributing in building a good brand image among the target audience. There are several areas where the premium brand advertising images congregate with the ones of the luxury brand. / Program: Magisterutbildning i fashion management med inriktning modemarknadsföring

The purpose of this study has been to examine how the media presents policymakers from a gender perspective. We have made an analysis on the basis of genderdichotomies. We have studied images from the Swedish newspaper Svenska Dagbladet as well as the French newspaper Le Monde in order to achieve a greater understanding in which way the both medias contributes to the reproduction of gender in the media.The conclusion of the study has shown that the gender system is somewhat confirmed by the way in which men and women are presented in the medias. Men are presented with more traditional gender related associations than women who is shown in a more dynamic constellation, this is mostly evident in the Swedish newspaper Svenska Dagbladet. / Syftet med denna studie har varit att undersöka hur media presenterar makthavare med utgångspunkt ur ett genusperspektiv. Vi har gjort en bildanalys vars verktyg har operationaliserats med utgångspunkt i genussystemets dikotomier. Vi har studerat bilder ur såväl Svenska Dagbladet som Le Monde i syfte att bredda förståelsen för hur Sverige och Frankrike ter sig ifråga om reproduktionen av genus i nämnda medier. De konklusioner som studien har uppvisat är att rådande genussystem delvis bekräftats då män i nämnda medier allt mer ofta framställs utifrån det som är manligt associerat. Däremot finns det en trend där kvinnor är mer dynamiska i hur de framställs utifrån könsbundna associationer, detta främst påtagligt i Svenska Dagbladet.

La mitochondrie est un carrefour d’informations au centre du fonctionnement cellulaire puisque son rôle physiologique consiste à récupérer l’énergie fournie par la dégradation des produits issus de notre alimentation pour produire de l’ATP, par le processus d’oxydation phosphorylante. Cependant, des altérations du fonctionnement de la mitochondrie peuvent être responsables de nombreuses pathologies. Parmi les stress métaboliques pouvant entraîner un dysfonctionnement mitochondrial, l’ischémie-reperfusion est un phénomène présent également dans de nombreuses situations pathologiques. L’objectif de ce travail consiste à développer une approche méthodologique basée sur la microscopie confocale et l’analyse d’images afin de décortiquer les conséquences cellulaires des stress métaboliques induits lors d’épisodes de privation de substrats associée ou non à une privation partielle ou totale d’oxygène. Après avoir mis au point le programme d’analyse d’images basée sur la méthode du « tophat », deux approches ont été développées pour visualiser et quantifier la fonction mitochondriale. La première, qui combine le marquage du TMRM et l’autofluorescence du NADH, a permis de mettre en évidence des différences de réponses au stress d’ischémie-reperfusion au niveau de la chaîne respiratoire ou de l’ouverture du PTP pour les quatre types cellulaires testés : HMEC-1, INS1, RT112 ou hépatocytes primaires. La seconde approche a consisté à tester l’utilisation de biosenseurs permettant de suivre les variations de concentration d’ATP (Ateam) ou d’activation de l’AMPK (AMPKAR). Les conditions expérimentales réalisées dans ce travail n’ont pas permis de valider leur utilisation. / Mitochondria form an information hub at the center of the cellular metabolism because of its physiological role consisting in the porduction of ATP from the degradation of porducts stemming from our food through the OXPHOS process. However, changes in the functionnig of the mitochondria can be responsible for numerous diseases. Among the different foms of metabolic stress leading to mitchondrial dysfunctions, ischemia-reperfusion can be found in numerous pathological situations. This work aims at developing a methodological approach based on confocal microscopy and image analysis to dissect –at cell level- the consequences of metabolic stress induced by episodes of deprivation in substrata associated or not with hypoxia or anoxia. Having developed the program of image analysis based on the « tophat » method, two approaches were designed to vizualize and quantify the mitochondrial function. The first one, combining TMRM labelling with NADH fluorescence made it possible to highlight some differences in the response to the stress caused by ischemia-reperfusion at the level of the respiratory chain or concerning the PTP opening in the four cellular types that were tested : HMEC-1, INS1, RT112 or pirmary heaptocyes. The second approach consisted in testing the use of biosensors designed to follow the variations of ATP concentration (ATeam) or the activation of AMPK (AMPKAR). The experimental conditions established in this work did not allow us to validate their use.

Thesis: Ph. D. in Mechanical and Oceanographic Engineering, Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2013. / Cataloged from PDF version of thesis. / Includes bibliographical references (pages 117-135). / A fundamental problem in autonomous underwater robotics is the high latency between the capture of image data and the time at which operators are able to gain a visual understanding of the survey environment. Typical missions can generate imagery at rates hundreds of times greater than highly compressed images can be transmitted acoustically, delaying that understanding until after the vehicle has been recovered and the data analyzed. While automated classification algorithms can lessen the burden on human annotators after a mission, most are too computationally expensive or lack the robustness to run in situ on a vehicle. Fast algorithms designed for mission-time performance could lessen the latency of understanding by producing low-bandwidth semantic maps of the survey area that can then be telemetered back to operators during a mission. This thesis presents a lightweight framework for processing imagery in real time aboard a robotic vehicle. We begin with a review of pre-processing techniques for correcting illumination and attenuation artifacts in underwater images, presenting our own approach based on multi-sensor fusion and a strong physical model. Next, we construct a novel image pyramid structure that can reduce the complexity necessary to compute features across multiple scales by an order of magnitude and recommend features which are fast to compute and invariant to underwater artifacts. Finally, we implement our framework on real underwater datasets and demonstrate how it can be used to select summary images for the purpose of creating low-bandwidth semantic maps capable of being transmitted acoustically. / by Jeffrey W. Kaeli. / Ph. D. in Mechanical and Oceanographic Engineering

Este trabalho tem como objetivo propor uma metodologia de análise da variabilidade de agregados graúdos de RCD reciclados, que possa ser utilizada em Centrais para o controle de qualidade dos mesmos, objetivando à identificação da influência destas características no desempenho de componentes produzidos a partir dos RCD. Nos três primeiros capítulos, realiza-se uma revisão bibliográfica do assunto, identificando os pontos relevantes do tema, abordando desde Centrais de moagem até desenvolvimento sustentável. No quarto capítulo, discute-se a metodologia de análise proposta, analisando a experimentação realizada em Santo André e no laboratório de materiais de construção da Escola Politécnica da USP. No quinto capítulo, desenvolve-se a análise de resultados e discussões. Nesta etapa, é exposto o estudo da composição de agregados graúdos de RCD reciclados por análise de imagem. Apresentam-se resultados da variabilidade obtidos para os agregados graúdos reciclados de Santo André quanto à composição de fases por separação manual e outras propriedades como materiais pulverulentos, composição granulométrica, índice de forma, absorção e massa específica. Como conclusões, o estudo aponta para a presença da significativa variabilidade em agregados reciclados em todas as propriedades analisadas e a necessidade de realização das mesmas caracterizações para a fração miúda. O uso das propriedades, abosorção de água e massa específica para adeterminação dos teores de concreto e argamassa apresentou bons resultados, aconselhando-se o emprego para a determinação das composições das fases concreto e argamassa em amostras de Centrais de Reciclagem. Os ensaios de caracterização física dos agregados graúdos naturais devem ser empregados para caracterizar esses agregados. A homogeneização da composição deve ser realizada em período superior a dois dias para esta Central. Os agregados, quando empregados em situações mais nobres, devem possuir equipamentos de controle de qualidade, como tanques de flutuação e separação magnética. Constatou-se que a porcentagem retida no fundo pelo ensaio de granulometria e os teores de argamassa têm correlação linear positiva. A análise de imagem pode ser aplicada para o estudo da composição dos agregados graúdos de RCD recilados, pois seus princípios foram comprovados em experimentos de laboratório, quando os grãos são distribuídos de forma aleatória nos plano. / The main point of this research proposes one methodology which analyses the variability of coarse CDW (Construction and Demolition Waste) recycled aggregates, applied on the quality control of these aggregates. With these analysis, it can be identified the influence of this variability in components performances. In the first three chapters, it is done one review of the literature, discussing about recycling plants, sustainable development and other topics. In the fourth chapter, it is discussed the methodology, analysing the experimentation. In fifth chapter, it is presented the results and discussions. The results presents the evaluation of the composition of the coarse CDW recycled aggregates by digital image processing. There are results of the variability of coarse CDW recycled aggregates by properties like composition using manual technique, particle size distribution, particle shape analysis, absorption, specific density and fine particles (< 0,075 mm). To sum up, the study indicates the existence of variability in whole properties analysed and the necessity of doing characterisation on fine aggregates. One developed technique improves the evaluation of composition by manual technique, using absorption and determines the percentage on the composition of concrete and mortar phases. The other characterisations of the study developed for natural aggregates can be applied to these recycled aggregates. The variability control must be done after two days for this recycling plant. In best applications, reycling plants need equipment of quality control like float tank and air classifier. It can be inferred that the percentage of fine aggregates (< 4,8mm) in grading test have linear correlation with percentage of mortar phase in composition. The study of composition using digital image processing obtained good results.

O controle da ocorrência de injúrias mecânicas de sementes, assunto de preocupação constante entre pesquisadores e produtores, deve ser priorizado para assegurar que apenas lotes de sementes com alto nível de desempenho sejam comercializados e utilizados pelos consumidores. Nesse contexto, visando avaliar a ocorrência de injúrias e os diferentes horários de colheita mecânica, com variações no grau de umidade das sementes durante o dia e sua influência na obtenção de lotes de sementes com alto nível de desempenho durante o armazenamento; a eficiência do uso da técnica de raios X na identificação de injúrias mecânicas e análises SVIS®, em comparação com procedimentos tradicionalmente utilizados para avaliação do vigor entre lotes de sementes, essa pesquisa teve como objetivo avaliar os possíveis efeitos imediatos e latentes da colheita mecanizada e sua relação com a ocorrência de injúrias mecânicas em sementes de trigo e os eventuais prejuízos causados à germinação e ao vigor das sementes. Utilizaram-se amostras de sementes dos cultivares BRS 208, BRS 220 e IPR 85, colhidas mecanicamente, em três horários distintos (11h, 14h e às 17h) e amostras em plantas colhidas e trilhadas manualmente, às 14h. O desempenho das sementes foi verificado durante 18 meses de armazenamento, por meio de avaliações da germinação, vigor e técnicas de análise de imagens. Constatou-se que a colheita mecanizada de sementes de trigo, com grau de umidade adequado, não afeta o potencial fisiológico das sementes obtidas, por períodos de até 18 meses de armazenamento. O uso do sistema computadorizado de análise de imagens de plântulas (SVIS®) é alternativa promissora para pesquisas com lotes de sementes de potencial fisiológico elevado. O teste de raios X é eficiente na identificação de injúrias mecânicas em sementes de trigo e permite estabelecer relações entre a severidade das injúrias e os efeitos causados à germinação. / The control of seed mechanical injuries occurrence, a constant concern among researchers and producers, must be a priority to ensure that only seed lots with high performance are commercialized and used by consumers. In order to evaluate the occurrence of injuries and the different periods of the day of mechanical harvesting, with variations of the seed moisture content during the day and the effects to obtain seed lots of high performance during storage; the X-ray technique efficiency in identifying mechanical injuries and SVIS® analysis compared to traditional procedures used to evaluate vigor between seed lots, this research aimed to evaluate mechanized harvesting, the immediate and latent effects, and its relation with mechanical injuries occurrence in wheat seeds and the possible damage caused to seed germination and vigor. Seed samples of BRS 208, BRS 220 and IPR 85 cultivars, mechanically harvested at 11:00 a.m., 2:00 p.m. and 5:00 p.m. and samples harvested and threshed manually at 2:00 p.m. were evaluated. Seed performance was evaluated by seed germination and vigor, and also image analysis technique for 18 months of storage. Results showed that wheat seeds mechanically harvested with adequate moisture content, do not show loss in the physiological potential after 18 months of storage. The use of seedling vigor imaging system (SVIS®) is a promising alternative for seed lots of high physiological potential. The Xray test is efficient to identify mechanical injuries in wheat seeds allowing the establishment of a relationship between the injuries severity and the effects to the germination process.