Neste trabalho, medimos o perfil 3D de superfícies (microtopografia) utilizando uma técnica de interferometria óptica: Phase-Shi,ftzng (Deslocamento de Fase). Utilizamos um interferômetro do tipo Twyman-Green para produzir fi.guras de interferência da superfície analisada. Essas imagens foram armazenadas usando-se uma câmera CCD ligada à um microcomputador. Para obter a microtopografia, calculamos o Mapa de Fase a partir das imagens digitalizadas usando um programa de microcomputador. Posteriormente um outro programa removeu a ambiguidade da função tangente (unwrapping), pela Técnica do Autômato Celular, usada no cáiculo do Mapa de Fase. Então efetuamos os cálculos para determinar a microtopografia da superfície. Depois fizemos a análise da microtopografia, levantando informações relevantes para a sua caracterização. Analisamos objetos com alta refletividade (espelhos planos e redes de Ronchi) e obtivemos bons resultados. Também comparamos alguns dos resultados obtidos com a técnica de Deslocamento de Fase com os resultados obtidos pela análise de Franjas de Igual Espessura. / In this work we measured the 3D profile of surfaces (microtopography) using a optical interferometric technique: Phase-Shifting. We used a interferometer of type Twyman-Green to produce interferograms from analyzed surface. These images was captured using a CCD camera that was linked to a microcomputer. To obtain a microtopography, we calculated the Phase Map using the digitalized images and a software of microcomputer. Then another program removed the wrapping of tangent fuction, using the Cellular-Automata Technique, that was used to calculate the Phase Map. So we calculated the microtopography of the surface. After we did the analyses of the microtopography, find out some important informations of its description. We studied objects with high reflectivity (plane mirrors and Ronchi ruting) and we obtained good results. Also we compared some results with that obtained by analyses of Fringes of Equal Thickness\'

With the election of President Trump, climate deniers feel emboldened and moved from the fringes to the centre of global policy making. We study how an agnostic approach to policy, based on Pascal's wager and allowing for subjective prior probability beliefs about whether climate deniers are right, prices carbon. Using the DICE integrated assessment model, we find that assigning a 10% chance of climate deniers being correct lowers the global price on carbon in 2020 only marginally: from $21 to $19 per ton of carbon dioxide if policymakers apply "Nordhaus discounting" and from $91 to $84 per ton of carbon dioxide if they apply "Stern discounting". Agnostics' reflection of remaining scientific uncertainty leaves climate policy essentially unchanged. The robustness of an ambitious climate policy also follows from using the max-min or the min-max regret principle. Letting the coefficient of relative ambiguity aversion vary from zero, corresponding to expected utility analysis, to infinity, corresponding to the max-min principle, we show how policy makers deal with fundamental climate model uncertainty if they are prepared to assign prior probabilities to different views of the world being correct. Allowing for an ethical discount rate and a higher market discount rate and for a wide range of sensitivity exercises including damage uncertainty, we show that pricing carbon is the robust response under rising climate scepticism. / Series: Ecological Economic Papers

Made available in DSpace on 2016-04-29T13:31:38Z (GMT). No. of bitstreams: 1 shirley acioly.pdf: 369979 bytes, checksum: dd2ee7e5cb84b0ba6999717aa06d5e64 (MD5) Previous issue date: 2007-11-28 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Intersex and identity: history of a reconstructed body is a Social Psychology study on the issue of the intersex identity and focuses on the process of reconstruction of self of a individual that had collated with situations that implied in the revision of its individuality, social identity and conscience of itself . Its hypothesis is of that the fight of the intersex people represents the attempt to exceed the stigma of a biological load interpreted as problematic and to establish a more favorable relation with the social environment. These individuals search to define a new social space and to conquer autonomy on its lives; they want to leave the confinement imposed for the shame and isolation which they are submitted and to be able to decide who they are. To answer to the research question - and considering the gap in national studies referring to the study of subjectivity in the intersexuality - I used as methodology of study the narrative of life history of a person diagnosed with genital ambiguity to allow the understanding of the process of social reconstruction of its body since, to change a body, to agree or not with the social demands should be in accord with the intentions, initiatives and pretensions of the person that recognizes her/himself (or not) in its alive body, once this body is organic substratum in which the personal existence incarnates / Intersexo e identidade: história de um corpo reconstruído é um estudo de Psicologia Social sobre a questão da identidade do intersexo e enfoca o processo de reconstrução do eu de um indivíduo que se confrontou com situações que implicaram na revisão de sua individualidade, identidade social e consciência de si mesmo. Sua hipótese é a de que a luta das pessoas intersexo representa a tentativa de ultrapassar o estigma de uma carga biológica interpretada como problemática e estabelecer uma relação com o meio social que lhes seja mais favorável. Esses indivíduos buscam definir um novo espaço social e conquistar autonomia sobre suas vidas; querem sair do confinamento imposto pela vergonha e isolamento ao qual são submetidas e poder decidir quem são. Para responder à questão da pesquisa - e considerando a lacuna em estudos nacionais referentes à subjetividade no estudo da intersexualidade - utilizei como metodologia o estudo de narrativa de história de vida de sujeito diagnosticado com ambigüidade genital para permitir a compreensão do processo de reconstrução social de seu corpo, pois mudar um corpo, dizer sim ou não às demandas sociais deveria estar em consonância com as intenções, iniciativas e pretensões da pessoa que se reconhece (ou não) em seu corpo vivo, posto que este corpo é o substrato orgânico no qual a existência pessoal se encarna

Made available in DSpace on 2016-04-25T19:20:30Z (GMT). No. of bitstreams: 1 Maria Claudia Araujo.pdf: 6735397 bytes, checksum: f76b77bdb53cf604135861dd13f0ad66 (MD5) Previous issue date: 2014-03-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / We investigate the ambiguity in the Parable of the Sower and the phenomenon of literariness, which comes from the Russian Formalism, since the evangelical discourse of Jesus is poetic and in this parable points to the polyphony to dialogism and intertextuality. We refer to the Hermeneutics of the Work of Art, Gadamer (2010), to rehabilitate the authority of tradition. In the case of the Catholic Church, only because it preserves an ancient exegesis. The corpus adopted in this research is the synoptic narrative of St. Mark (4, 1-20), St. Matthew (13, 1-23) and Luke (8, 4-15), which speaks to Saint John (21, 1 -14) and nuances of the Eternal Church of Apocalypse (21 e 22). The synoptic gospels are considered immanent, by tradition, and of St. John, transcendent. The four plots in the parable of the sowing point to the glory of the Eternal Church and its relationship with Christ, who is also the Sower, as this parable is centered in Christ, as well as its structure, reconstructed here under the support of methodologies of the theory literature. Indeed, Christ, Church, Word and Kingdom of Heaven turn to themselves in this parable - which gives it a jakobsoniana reading the poetic function of language, as well as metalinguistic. Indeed, this innovative interpretation culminates in a new exegetical method, the poetic-religious, specifically designed for reading the Parable of the Sower but that may be developed by traditional exegesis in future from new canonical guidelines and assumptions / Investigamos a ambiguidade na Parábola do Semeador e o fenômeno da literariedade, que advém do Formalismo Russo, uma vez que o discurso evangélico de Jesus é poético e, nesta parábola, aponta para a polifonia, a dialogia e a intertextualidade. Pautamo-nos ainda na Hermenêutica da Obra de Arte, de Gadamer (2010), para reabilitar a autoridade da tradição. No caso, a da Igreja Católica, exclusivamente pelo fato de ela preservar consigo uma exegese milenar. O corpus adotado nesta pesquisa é a narrativa sinótica de São Marcos (4, 1-20), São Mateus (13, 1-23) e São Lucas (8, 4-15); a qual dialoga com São João (21, 1-14) e com matizes da Igreja Eterna do Apocalipse (21 e 22). Os Evangelhos sinóticos são considerados imanentes, pela tradição, e o de São João, transcendente. Os quatro terrenos da semeadura da parábola apontam para a glória da Igreja Eterna e sua relação com o Cristo, que é também o Semeador, visto que esta parábola é cristocêntrica, bem como a sua estrutura, reconstruída aqui sob o respaldo de metodologias da Teoria da Literatura. Com efeito, Cristo, Igreja, Palavra e Reino dos Céus voltam-se para si mesmos, nesta parábola o que lhe confere uma leitura jakobsoniana da função poética da linguagem, bem como metalinguística. Com efeito, esta interpretação inovadora culmina em um novo método exegético, o poético-religioso, especificamente elaborado para a leitura da Parábola do Semeador mas que pode ser desenvolvido pela exegese tradicional, futuramente, a partir de novas diretrizes e pressupostos canônicos

Les informations négatives sur les produits et les entreprises auxquelles les consommateurs ont accès ne sont pas toujours fiables et claires. Cette thèse étudie comment l'orientation régulatrice des consommateurs influe sur leur réaction par rapport aux informations négatives comme une fonction de l'ambiguïté des informations. Nous suggérons que lorsque les informations négatives sont ambigües, les consommateurs avec une orientation prévention, par rapport à ceux avec une orientation promotion, seront beaucoup plus influencés par les informations et susceptibles de changer en conséquence vers le bas leur attitude envers la marque. En revanche, lorsque les informations négatives sont claires, à la fois les consommateurs orientés promotion et ceux orientés prévention seront très influencés et susceptibles de revoir leur attitude à la baisse par rapport à la marque en question. De plus, nous alléguons que la diagnosticité perçue des informations exerce un rôle médiateur sur les effets proposés. Plus particulièrement, en présence des informations négatives ambiguës, l'orientation prévention (par rapport à l'orientation promotion) a tendance à amplifier la diagnosticité perçue des informations qui, en retour, accentue les effets que les informations négatives auront sur la révision de l'attitude. Quatre études expérimentales ont testé et confirmé ces hypothèses à travers trois scénarios ambigus différents : (1) quand les informations négatives proviennent d'une source dont la crédibilité est incertaine (étude 1), (2) quand la raison pour laquelle un produit défectueux est ambiguë (étude 2) et (3) quand les évaluations de produit sont très contradictoires (études 3a et 3b). / Negative information about products or companies that consumers encounter in the marketplace is not always certain and clear-cut. This dissertation explores how consumers' regulatory focus orientation affects their response to negative information as a function of information ambiguity. We propose that under the situations where ambiguity is present in the negative information, prevention-focused compared to promotion-focused consumers will be more strongly persuaded and exhibit a large downward revision of their attitude toward the brand. In contrast, under the situations where the negative information is unambiguous, both promotion and prevention-focused consumers will be strongly persuaded and revise accordingly their attitude toward the brand. Moreover, we argue that perceived diagnosticity of the information mediates the proposed effect. Specifically, in the presence of ambiguity in negative information, a prevention focus (vs. a promotion focus) leads to an inflated perceived information diagnosticity, which, in turn, accentuates the impact of negative information on judgment revision. Four experimental studies tested and confirmed these propositions in three different ambiguous scenarios: (1) when negative product information comes from a source with uncertain credibility(Study 1); (2) when the cause of a reported product failure is ambiguous(Study2), and (3) when product reviews are highly conflicting (Study 3a and Study 3b).

Emojis are useful and efficient tools in computer-mediated communication. The present study aims to find out how English-speaking Twitter users employ five specific emojis, and if they utilize them for the same pragmatic functions. The five emojis were chosen based on earlier research on the subject. One of them was deemed unambiguous and four were deemed ambiguous in previous studies. To investigate whether these emojis are ambiguous and if they are used for several pragmatic functions, a corpus was made by collecting tweets from Twitter. 100 tweets were gathered for each emoji: 50 from New York and 50 from London. Each tweet was analyzed in order to see what function the emoji served in each tweet. Another objective was to find out if cultural differences had any importance for the pragmatic function of the emojis. Three of the four emojis that had been deemed ambiguous by previous research were considered to be ambiguous in the present study as well, as they displayed a multitude of different pragmatic meanings. The single emoji that was considered to be unambiguous by previous research, was used in a consistent manner in the present study, which confirmed the theory that it truly is unambiguous. The results also showed that cultural influences do play a role in how people use emojis for different pragmatic functions. / Emojis är användbara och effektiva verktyg i digital kommunikation. Denna undersökning syftar till att ta reda på hur engelsktalande Twitter-användare använder fem specifika emojis, och om de utnyttjar dem för att förmedla samma pragmatiska funktioner. Fem emojis valdes utifrån tidigare forskning i ämnet; en av dem ansågs entydig och fyra ansågs tvetydiga i tidigare studier. För att undersöka om dessa emojis är tvetydiga, och om de används för flera pragmatiska funktioner, gjordes en corpus genom att samla in tweets från Twitter. 100 tweets samlades in för varje emoji; 50 från New York och 50 från London. Varje tweet analyserades för att se vilken funktion emojin hade i varje tweet. Ett annat syfte var att ta reda på om kulturella skillnader har någon betydelse för vilken pragmatisk funktion emojin tjänar. Tre av de fyra emojis som i tidigare forskning ansetts vara tvetydiga kan betraktas som tvetydiga även i denna studie, eftersom de visade på en mängd olika pragmatiska betydelser. Den emoji som ansågs vara otvetydig i tidigare forskning visade sig användas på ett konsekvent sätt även i denna studie, vilket bekräftar teorin om att den verkligen är entydig. Resultaten av denna studie visade även att det finns en kulturell påverkan på hur människor använder emojis för olika pragmatiska funktioner.

A comunicação multilíngue é uma tarefa cada vez mais imperativa no cenário atual de grande disseminação de informações em diversas línguas. Nesse contexto, são de grande relevância os sistemas de tradução automática, que auxiliam tal comunicação, automatizando-a. Apesar de ser uma área de pesquisa bastante antiga, a Tradução Automática ainda apresenta muitos problemas. Um dos principais problemas é a ambigüidade lexical, ou seja, a necessidade de escolha de uma palavra, na língua alvo, para traduzir uma palavra da língua fonte quando há várias opções de tradução. Esse problema se mostra ainda mais complexo quando são identificadas apenas variações de sentido nas opções de tradução. Ele é denominado, nesse caso, \"ambigüidade lexical de sentido\". Várias abordagens têm sido propostas para a desambiguação lexical de sentido, mas elas são, em geral, monolíngues (para o inglês) e independentes de aplicação. Além disso, apresentam limitações no que diz respeito às fontes de conhecimento que podem ser exploradas. Em se tratando da língua portuguesa, em especial, não há pesquisas significativas voltadas para a resolução desse problema. O objetivo deste trabalho é a proposta e desenvolvimento de uma nova abordagem de desambiguação lexical de sentido, voltada especificamente para a tradução automática, que segue uma metodologia híbrida (baseada em conhecimento e em córpus) e utiliza um formalismo relacional para a representação de vários tipos de conhecimentos e de exemplos de desambiguação, por meio da técnica de Programação Lógica Indutiva. Experimentos diversos mostraram que a abordagem proposta supera abordagens alternativas para a desambiguação multilíngue e apresenta desempenho superior ou comparável ao do estado da arte em desambiguação monolíngue. Adicionalmente, tal abordagem se mostrou efetiva como mecanismo auxiliar para a escolha lexical na tradução automática estatística / Crosslingual communication has become a very imperative task in the current scenario with the increasing amount of information dissemination in several languages. In this context, machine translation systems, which can facilitate such communication by providing automatic translations, are of great importance. Although research in Machine Translation dates back to the 1950\'s, the area still has many problems. One of the main problems is that of lexical ambiguity, that is, the need for lexical choice when translating a source language word that has several translation options in the target language. This problem is even more complex when only sense variations are found in the translation options, a problem named \"sense ambiguity\". Several approaches have been proposed for word sense disambiguation, but they are in general monolingual (for English) and application-independent. Moreover, they have limitations regarding the types of knowledge sources that can be exploited. Particularly, there is no significant research aiming to word sense disambiguation involving Portuguese. The goal of this PhD work is the proposal and development of a novel approach for word sense disambiguation which is specifically designed for machine translation, follows a hybrid methodology (knowledge and corpus-based), and employs a relational formalism to represent various kinds of knowledge sources and disambiguation examples, by using Inductive Logic Programming. Several experiments have shown that the proposed approach overcomes alternative approaches in multilingual disambiguation and achieves higher or comparable results to the state of the art in monolingual disambiguation. Additionally, the approach has shown to effectively assist lexical choice in a statistical machine translation system

L’accélération du rythme des innovations technologiques et les pressions exercées par la société civile constituent deux défis majeurs pour le droit de la responsabilité civile. Cette thèse étudie les effets incitatifs de la responsabilité civile sur le comportement de prévention des entreprises dans ce contexte. Notre contribution vise, en particulier, à approfondir l’analyse traditionnelle de la responsabilité civile des entreprises d’une part, et d’autre part à évaluer dans quelle mesure les sanctions non légales jouent un rôle au côté de ce cadre juridique. D’abord, nous mettons en évidence l’évolution de l’analyse économique de la responsabilité. Puis nous étudions la responsabilité civile dans un modèle théorique, avec pour contribution d’évaluer les effets incitatifs du concept juridique de causalité. Ensuite, nous examinons comment les difficultés de prévision des risques d’accident affectent les incitations fournies par la responsabilité civile,par un modèle théorique d’une part, et par une expérimentation en laboratoire d’autre part. Nous développons dans un modèle théorique une analyse du rôle des sanctions non légales, émanant de la société civile,aux côtés de la responsabilité délictuelle. Nous montrons que les incitations fournies par le boycott des consommateurs sur le comportement de prévention des entreprises sont limitées. Enfin, nous complétons ce modèle par une étude empirique, et nous étudions l’ampleur et les déterminants du phénomène de boycott des consommateurs en Europe. / The accelerating pace of technological innovations and pressures from civil society provide tort law with new challenges. This thesis studies the incentive effects of tort law on corporate investment in prevention in this context. Particularly, this study deepens the traditional economic analysis of corporate civil liability and assess the effects of the combination of non legal sanctions and the legal framework. First, we highlight the evolution of the economic analysis of liability and responsibility. Then, we study the incentive effects ofcivil liability in a theoretical model, with a particular emphasis on the role of the legal notion of causality. Next, we examine to what extent the difficulties of predicting accident risks affect incentives provided by liability with both a theoretical model and with a lab experiment. In a theoretical model, we develop ananalysis of the role of non-legal sanctions, from civil society, along side the tort law. We show that the incentive effects of consumer boycott on corporate investment in prevention are limited. Finally, through an empirical study, we complete this analysis by studying the magnitude and determinants of consumer boycott in Europe.

Les travaux présentés dans cette thèse portent sur l'étude et la réalisation d'un système d'imagerie SAR (synthetic aperture radar) exploitant deux techniques provenant des communications numériques: la configuration MIMO et les signaux OFDM. Dans la première partie de cette étude, différentes méthodes de focalisation des signaux reçus pour la configuration MIMO sont proposées afin de mesurer l'impact de la configuration MIMO sur la robustesse du système d'imagerie SAR par rapport aux bruits. Par ailleurs, on mesure aussi l'impact de la configuration MIMO sur la résolution en azimut. Finalement, un système expérimental est développé au sein du laboratoire afin de confirmer les résultats obtenus par simulation. Dans la deuxième partie de cette étude, une méthode de réduction de l'ambiguïté en distance est proposée et validée par simulation. Cependant, l'utilisation de signaux classiques de type \textit{chirps} montre ses limites pour la réduction de l'ambiguïté en distance. Ainsi, une méthode de conception de signaux OFDM est développée afin de résoudre ce problème. Une dernière étude sur les signaux OFDM est mené dans le cadre de son utilisation dans la configuration MIMO pour l'imagerie SAR. L'impact des signaux OFDM sur la résolution azimutale ainsi que sur les différents paramètres de qualité images est étudié. / The work presented in this thesis focuses on the design and implementation of a SAR system operating with two Digital Communications technology: MIMO configuration and OFDM signals. In the first part of this study, various methods for focusing received signals for MIMO configuration are proposed in order to measure the impact of the MIMO configuration on the robustness. In addition, the impact of the MIMO configuration on the azimuth resolution is measured. Finally, an experimental system is developed in order to validate the results obtained by simulation. In the second part of this study, a range ambiguity suppression method is proposed and validated by simulation. However, the use of conventional chirp signals showed the limits of its use for the range ambiguity suppression. Thus, a design method of OFDM signals is developed in order to solve this problem. The last study on the OFDM signals is carried out in the context of its use with the MIMO configuration. The impact of the OFDM signals on the azimuth resolution and the imaging quality parameters are studied.

A anotação geográfica de documentos consiste na adoção de metadados para a identificação de nomes de locais e a posição de suas ocorrências no texto. Esta informação é útil, por exemplo, para mecanismos de busca. A partir dos topônimos mencionados no texto é possível identificar o contexto espacial em que o assunto do texto está inserido, o que permite agrupar documentos que se refiram a um mesmo contexto, atribuindo ao documento um escopo geográfico. Esta Dissertação de Mestrado apresenta um novo método, batizado de Geofier, para determinação do escopo geográfico de documentos. A novidade apresentada pelo Geofier é a possibilidade da identificação do escopo geográfico de um documento por meio de classificadores de aprendizagem de máquina treinados sem o uso de um gazetteer e sem premissas quanto à língua dos textos analisados. A Wikipédia foi utilizada como fonte de um conjunto de documentos anotados geograficamente para o treinamento de uma hierarquia de Classificadores Naive Bayes e Support Vector Machines (SVMs). Uma comparação de desempenho entre o Geofier e uma reimplementação do sistema Web-a-Where foi realizada em relação à determinação do escopo geográfico dos textos da Wikipédia. A hierarquia do Geofier foi treinada e avaliada de duas formas: usando topônimos do mesmo gazetteer que o Web-a-Where e usando n-gramas extraídos dos documentos de treinamento. Como resultado, o Geofier manteve desempenho superior ao obtido pela reimplementação do Web-a-Where. / Automatic text geotagging is the process by which mentions of place names and their positions in text are identified as metadata, allowing this information to be used by specialized applications, like Search Engines. It is possible to identify the geographic scope of a document by analysing the toponyms it mentions and then group documents by their geographic context, effectively adding a geographic scope to the documents. This dissertation presents a new method to identify the geographic scope of text, named Geofier. The novelty in Geofier is that it uses machine learning text classifiers, trained without the need of a gazetteer and without making assumptions regarding the language in which the documents are written. Wikipedia was used as the source for a geotagged text dataset in order to train a hierarchy of Naive Bayes and Support Vector Machine (SVM) classifiers. The Geofier hierarchy was then trained and evaluated, first using toponyms from the same gazetteer as Web-a-Where and then using n-grams extracted from the training samples as attributes. Geofier performed significantly better when compared to a Web-a-Where implementation.