Submitted by Renata Lopes (renatasil82@gmail.com) on 2018-08-22T18:18:00Z No. of bitstreams: 1 giovannaarelisbaldeonpenao.pdf: 709529 bytes, checksum: 3a96b8a9a33c7117ccbff2e2ff41c7c0 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-09-03T16:34:23Z (GMT) No. of bitstreams: 1 giovannaarelisbaldeonpenao.pdf: 709529 bytes, checksum: 3a96b8a9a33c7117ccbff2e2ff41c7c0 (MD5) / Made available in DSpace on 2018-09-03T16:34:23Z (GMT). No. of bitstreams: 1 giovannaarelisbaldeonpenao.pdf: 709529 bytes, checksum: 3a96b8a9a33c7117ccbff2e2ff41c7c0 (MD5) Previous issue date: 2018-05-30 / O objetivo deste trabalho é estudar um método, apresentado em [6], que nos permite determinar se uma folheação no plano projetivo possui ou não soluções algébricas, usando apenas métodos de computação algébrica. Mais especificamente usando bases de Gröbner. Com este método é possível procurar por outros exemplos de folheações sem soluções algébricas. / The aim of this work is to present a method, given by S. C. Coutinho and Bruno F. M. Ribeiro in [6], to check whether certain holomorphic foliations on the complex projective plane have algebraic solutions, using only methods of algebraic computing or more precisely, using Gröbner bases. This algorithm is then used to produce examples of foliations without algebraic solutions.

Le chiffrement fonctionnel est une technique émergente en cryptographie dans laquelle une autorité toute puissante est capable de distribuer des clés permettant d’effectuer des calculs sur des données chiffrées de manière contrôlée. La mode dans ce domaine est de construire des schémas qui sont aussi expressifs que possible, c’est-à-dire du chiffrement fonctionnel qui permet l’évaluation de n’importe quel circuit. Ces contributions délaissent souvent l’efficacité ainsi que la sécurité. Elles reposent sur des hypothèses fortes, très peu étudiées, et aucune construction n’est proche d’être pratique. Le but de cette thèse est d’attaquer ce défi sous un autre angle : nous essayons de construire des schémas de chiffrement fonctionnel les plus expressifs que nous le pouvons en se basant sur des hypothèses standards, tout en conservant la simplicité et l’efficacité des constructions. C’est pourquoi nous introduisons la notion de chiffrement fonctionnel pour l’évaluation de produits scalaires, où les messages sont des vecteurs ~x, et l’autorité peut transmettre des clés correspondants à des vecteurs ~y qui permettent l’évaluation du produit scalaire h~x, ~yi. Cette fonctionnalité possède immédiatement des applications directes, et peut aussi être utilisé dans d’autres constructions plus théoriques, leproduit scalaire étant une opération couramment utilisée. Enfin, nous présentons deux structures génériques pour construire des schémas de chiffrement fonctionnels pour le produit scalaire, ainsi que des instanciations concrètes dont la sécurité repose sur des hypothèses standards. Nous comparons aussi les avantages et inconvénients de chacune d’entre elles. / Functional encryption is an emerging framework in which a master authority can distribute keys that allow some computation over encrypted data in a controlled manner. The trend on this topic is to try to build schemes that are as expressive possible, i.e., functional encryption that supports any circuit evaluation. These results are at the cost of efficiency and security. They rely on recent, not very well studied assumptions, and no construction is close to being practical. The goal of this thesis is to attack this challenge from a different angle: we try to build the most expressive functional encryption scheme we can get from standard assumption, while keeping the constructions simple and efficient. To this end, we introduce the notion of functional encryption for inner-product evaluations, where plaintexts are vectors ~x, and the trusted authority delivers keys for vectors ~y that allow the evaluation of the inner-product h~x, ~yi. This functionality already offers some direct applications, and it can also be used for theoretical constructions, as inner-product is a widely used operation. Finally, we present two generic frameworks to construct inner-product functional encryption schemes, as well as some concrete instantiations whose security relies on standard assumptions. We also compare their pros and cons.

À partir d'une étude longitudinale menée auprès de 25 personnes hospitalisées en service gériatrique de soins de suite et de réadaptation, et revus quatre mois après leur sortie à leur domicile habituel ou en Établissement d'Hébergement pour Personnes Âgées Dépendantes, cette thèse se propose d'explorer l'expérience sensible et singulière des hommes et des femmes qui rencontrent, sur le chemin du vieillissement et de la vieillesse, la nécessité de soins de longue durée, qui inscrit la perspective d'un devenir placé sous le signe de la dépendance. La signification subjective spécifique que revêt la dépendance pour les individus concernés est examinée à l'aune des travaux en psychologie clinique et psychopathologie orientés par les études psychanalytiques sur le vieillissement et sur le handicap. La thèse étudie leur valeur heuristique, en articulation avec les éthiques du care, pour dégager les fondements métapsychologiques de la problématique de dépendance et ses enjeux en termes de dispositifs thérapeutiques. La thèse revient notamment sur les ambiguïtés relatives à la notion d' « institutionnalisation » et propose une problématisation conceptuelle du travail psychique en situation de dépendance, appelé « travail de dépendance », à partir de laquelle est analysé le matériel clinique recueilli pendant le processus de recherche, sur la base d'entretiens cliniques, d'épreuves projectives (Rorschach et Thematic Apperception Test), d'une évaluation de la dépression et d'une évaluation des ressources cognitives. Il apparaît que le caractère de « crise » inhérent à ce moment de passage questionne les modalités de préparation à la sortie de l'hôpital, et notamment la fonction psychique assurée par le projet d'institutionnalisation. L'analyse des résultats montre combien l'investissement des objets du care relève chaque fois d'une véritable création personnelle, à laquelle le type d'organisation psychopathologique, l'intensité des problématiques de perte et de passivité, ainsi que le poids des opérations défensives mobilisées pour y faire face, confèrent une coloration singulière. De manière notable, le traitement de ces problématiques reste saisi dans une intrication des registres psychosexuel et anaclitique, qui dément l'idée selon laquelle l'acuité de la question narcissique abolirait sensiblement la conflictualité liée à la sexualité infantile. Se saisissant du contraste repéré entre la souffrance psychique amplement constatée chez les personnes rencontrées et l'absence, par ailleurs, de décompensation dépressive ou psychiatrique manifeste, la thèse questionne les ressorts subjectifs du consentement au projet d'institutionnalisation des soins de longue durée, et les écueils d'une mobilisation défensive, à visée anti-dépressive, susceptible de s'abîmer dans l'adaptation conformiste ou la (pseudo)normalité discrète. Il en ressort qu'une attention particulière doit être portée à la façon dont le processus de l'annonce du projet d'institutionnalisation est susceptible d'opérer sur la temporalisation nécessaire à l'appropriation subjective de l'expérience. / This thesis analyses the singular experience of elderly men and women who face up to dependency and needs for long- term care supports or services. This analysis is based on a longitudinal study conducted with 25 men and women, hospitalised in geriatric units, and met again four months after the end of their hospitalisation, at home or in nursing home. The specific subjective meaning of dependency for the concerned subjects is examined from clinical psychology and psychopathology works, especially from psychoanalysis contributions on ageing and disability, related with ethics of care. This thesis draws out the meta-psychologic basis of the dependency issue and its stakes in terms of therapeutic settings. In particular, it comes back on the notion of "institutionalisation" and its ambiguities. It also proposes a conceptual problematisation of the psychic work mobilised in the dependency process, called "dependency work". This specific problematisation constitutes the analysis framework of the clinical data we collected for this thesis, on the basis of interviews, projective methods (Rorschach and Thematic Apperception Test), depression scale and cognitive assessment. It appears that the "crisis", that transition from hospital to long-term care may cause for elderly subjects, questions the way hospital discharge is prepared and particularly the psychic function performed by the institutionalisation project. The analysis of our results highlights how important is the involvement of a genuine singular process of creation in the adjustment of long-term care supports in the ageing; this process of creation depends on personality organisation, on the strength of loss and passivity issues, and on the quality of defence mechanisms. It is worth noting that the psychic reorganisations at work in these issues are based on the intertwining of psycho-sexual and anaclitic levels. Therefore, narcissistic crisis does not erase infantile sexuality conflicts in ageing. Besides, we clearly identify a contrast between the psychic suffering largely observed in our subjects and the absence of depressive or psychiatric decompensation. This contrast leads us to study the subjective motivations of elderly subjects to consent to long-term care institutionalisation, and the pitfalls of defensive mechanisms, mobilised against depression, which may trigger conformist adaptive or pseudo-normal responses. Consequently, an outcome of this thesis is that we have to pay special attention to the implications of the announcement process of long-term care project on the necessary temporalisation for elderly subject who experiments this situation to subjectively appropriate it.

For over two decades, mathematicians and cryptologists have evaluated and presented the theoretical performance of Elliptic-curve scalar point-multiplication in projective geometry. Because computation in projective domain is composed of a wide array of formulations and computing optimizations, there is not a comprehensive performance comparison of point-multiplication using projective transformation available to verify its realistic efficiency in 64-bit x86 computing platforms. Today, research on explicit mathematical formulations in projective domain continues to excel by seeking higher computational efficiency and ease of realization. An explicit performance evaluation will help implementers choose better implementation methods and improve Elliptic-curve scalar point-multiplication. This paper was founded on the practical solution that obtaining realistic performance figures should be based on more precise computational cost metrics and specific computing platforms. As part of that solution, an empirical performance benchmark comparison between two approaches implementing projective Elliptic-curve scalar point-multiplication will be presented to provide the selection of, and subsequently ways to improve scalar point-multiplication technology executing in a 64-bit x86 runtime environment.

Cette thèse est subdivisée en deux parties. Dans la premier, je étudie la normalité projective de variétés symétriques, tandis que dans la deuxième je prouve des résultats partiels sur la classification de variétés symétriques de Fano (i.e. avec fibré anti-canonique ample). Dans [R. Chirivì, A. Maffei, Projective normality of complete symmetric varieties, Duke Math. J. 122 (1) (2004) 93-123], les authors ont prouvé la surjectivité du produit de sections de deux fibrés en droites globalement engendrés sur le plongement magnifique d'un espace symétrique (adjoint). Donné deux fibrés en droites amples sur une variété symétrique toroïdale compacte et lisse, je prouve deux critères pour la surjectivité du produit de sections. Grace à tels critères on se peut réduire à étudier le même problème sur la variété torique compacte (respectivement ouverte) associé. De plus, j'ai trouvé des familles de variétés symétriques toroïdales complètes, en particulier lesquelles avec rang 2, telles que le produit de sections de n'import quel fibré en droites ample est surjectif. Dans la deuxième part de ma thèse, j'ai d'abord classifié les variétés symétriques de Fano avec rang arbitraire et que l'on peut obtenir à partir du plongement magnifique par une succession des éclatements le long d'orbites fermées. Quand le rang est au plus trois, j'ai obtenu des résultats plus précis. Les variétés symétriques projectives avec rang un sont tous lisse et magnifique par un résultat classique dû à Akhiezer. J'ai classifié les variétés symétriques toroïdales projectives lisses de rang 2 dont le fibré anti-canonique est ample, respectivement globalement engendré. De plus, j'ai classifié les variétés symétriques de Fano avec rang 3 que l'on peut obtenir à partir du plongement magnifique par une succession des éclatements des sous-variétés G-stables. On peut observer que n'import quelle variété symétrique complete est dominé par une variété que l'on peut obtenir à partir du plongement magnifique par une succession des éclatements des sous-variétés G-stables de codimension 2.

The main results of this dissertation show evidence supporting the Successive Surface Scaffolding Conjecture. This is a new conjecture that, if true, guarantees the existence of all the wye-delta-order minimal obstructions of a surface S as subgraphs of the irreducible triangulations of the surface S with a crosscap added. A new data structure, i.e. an augmented rotation system, is presented and used to create an exponential-time algorithm for embedding graphs in any surface with a constant-time check of the change in genus when inserting an edge. A depiction is a new formal definition for representing an embedding graphically, and it is shown that more than one depiction can be given for nonplanar embeddings, and that sometimes two depictions for the same embedding can be drastically different from each other. An algorithm for finding the essential cycles of an embedding is given, and is used to confirm for the projective-plane obstructions, a theorem that shows any embedding of an obstruction must have every edge in an essential cycle. Obstructions of a general surface S that are minor-minimal and not double-wye-delta-minimal are shown to each have an embedding on the surface S with a crosscap added. Finally, open questions for further research are presented. / Graduate

In this thesis we describe an algorithm and implement a construction of a projective resolution and minimal projective resolution in the representation the- ory of finite-dimensional algebras. In this thesis finite-dimensional algebras are KQ /I where KQ is a path algebra and I is an admissible ideal. To implement the algorithm we use the package QPA [9] for GAP [2]. We use the theory of Gröbners basis of KQ-modules and the theory described in article Minimal Pro- jective Resolutions written by Green, Solberg a Zacharia [5]. First step is find a direct sum such that i∈Tn fn∗ i KQ = i∈Tn−1 fn−1 i KQ ∩ i∈Tn−2 fn−2 i I. Next important step to construct the minimal projective resolution is separate nontri- vial K-linear combinations in i∈Tn−1 fn−1 i I + i∈Tn fn i J from fn∗ i . The Modules of the minimal projective elements are i∈Tn (fn i KQ)/(fn i I). 1

O Transtorno de Déficit de Atenção/Hiperatividade (TDA/H) é um distúrbio do neurodesenvolvimento caracterizado por desatenção, hiperatividade e impulsividade. A criança com esse diagnóstico apresenta prejuízo clinicamente significativo no funcionamento social e acadêmico. A literatura revela que a suscetibilidade genética em interação com fatores ambientais, inclusive os familiares, compõem a sua etiologia. Desse modo, conhecer as experiências dos familiares e da criança com TDA/H é importante para a compreensão do surgimento e manutenção desse quadro. Por conta disso, esta pesquisa objetiva compreender como a experiência materna de mulheres com filhos diagnosticados com TDA/H se associa ao desenvolvimento do Self dessas crianças. Para tanto, foi realizada uma pesquisa clínicoqualitativa, empregando a Psicanálise winnicottiana como referencial teórico. A estratégia metodológica utilizada foi a das Narrativas Transferenciais. Participaram desta pesquisa, quatro díades mães e filhos. Foi realizado primeiramente um encontro com a mãe para coletar dados demográficos e de identificação dela e da criança, e a aplicação da Escala de Maturidade Mental Colúmbia (EMMC), de forma a assegurar os critérios de inclusão/exclusão na pesquisa. No segundo encontro, foi solicitado que a mãe falasse sobre sua experiência como mãe de um filho diagnosticado com TDA/H, a partir da visualização de alguns cartões do Teste de Apercepção Infantil figuras de animais (CAT-A). Separadamente, para a criança, foram apresentados os mesmos cartões do CAT-A visualizados pela mãe, solicitando que ela contasse uma história sobre cada um deles. Os encontros com a mãe e com a criança foram descritos na forma de narrativas transferenciais individuais e, após essa redação, foi feita uma interpretação psicanalítica do material produzido por cada membro da díade. Em seguida, foi realizada uma síntese da díade, no intuito de relacionar a experiência materna e o desenvolvimento do Self da criança. Após a análise e interpretação do material produzido por cada uma das díades, foi feita uma síntese final dos resultados de todas as mães, outra de todas as crianças e, finalmente, uma síntese final de todas as díades. Em relação à experiência materna, as mães relataram angústias vivenciadas durante a gestação e após o nascimento dos filhos. Elas não conseguiram entrar em sintonia com eles no início da vida, não tiveram condições, por razões diversas, para experimentar a devoção e manifestaram dificuldades em vincular-se com a criança e oferecer-lhes holding. Nessas condições, as crianças não dispuseram de oportunidades suficientes para usufruir das experiências de ilusão, o que comprometeu o processo posterior de desilução. Essas dificuldades de relacionamento inicial da díade, que persistiam até o momento da pesquisa, eram decorrentes de vivências depressivas latentes ou manifestas das mães, que acarretavam prejuízos na capacidade para as experiências transicionais, para o brincar e para a simbolização. Os comportamentos desatentos e hiperativos da criança pareceram ser uma resposta a esse abafamento e desconsideração do gesto criativo, que permanece na forma de uma motricidade exacerbada e sem objetivos. Os resultados apontam, portanto, para dificuldades no processo de constituição do Self tanto das crianças quanto das mães. Estudos que aprofundem essa vertente compreensiva da relação entre a mãe e a criança com TDA/H devem ser encorajados, visto que esta parece ser uma via promissora para o desenvolvimento de estratégias terapêuticas para esse sofrimento da díade. / Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopment disorder characterized by lack of concentration, hyperactivity and impulsiveness. Child with this diagnosis presents clinically significant disadvantage in social and academic functioning. The literature reveals that genetic susceptibility in interaction with environmental factors, including family factors, compose its etiology. Thereby, knowing the relatives and ADHD childs experiences is important for understanding the emergence and maintenance of this condition. Therefore, this research aims to understand how the maternal experience of ADHD children mothers is associated with the development of the Self of these children. For that, a clinical-qualitative research was carried out applying the Winnicottian psychoanalysis as a theoretical reference. The methodological strategy used was the \"Transferential Narratives\". There were four dyads mothers and children participating in this research. At first, it was held a meeting with the mother to collect demographic and identification data from her and the child, and the application of the Columbia Mental Maturity Scale (CMMS), in order to ensure the inclusion/exclusion criteria in the research. At the second meeting, the mother was asked to speak about her experience as the mother of a child diagnosed with ADHD, from the visualization of some cards of the Childrens Apperception Test - animal figures (CAT-A). Separately, to the child, it was presented the same CAT-A cards visualized by the mother, and it was asked to tell a story about each of them. The meetings with the mother and the child were described in the shape of individual transferential narratives and after this writing a psychoanalytic interpretation of the material produced by each member of the dyad was done. Later, a dyad synthesis was made in order to relate the maternal experience and the development of the child\'s Self. After the analysis and interpretation of the material produced by each of the dyads, a final synthesis of the results of all mothers was done, as well as another one of all the childrens results, and finally a final synthesis of all the dyads. Concerning the maternal experience, the mothers reported anguishes experienced during pregnancy and after the birth of their children. They were not able to tune into them early in life, they were not able, for various reasons, to experience the devotion and they showed difficulties in linking themselves with the child and offering them a holding. Under these conditions, children did not have sufficient opportunities to enjoy the illusion experiences, which compromised the subsequent process of disappointment. These initial dyad relationships, which persisted until the moment of the research, were due to the mothers latent or manifested depressive experiences, that resulted entailed impairments in the capacity for transitional experiences, to play and to symbolization. The child\'s inattentive and hyperactive behaviors seemed to be a response to this drowning and disregard of the creative gesture, which remains in the form of an exacerbated and aimless motricity. The results point, therefore, to difficulties in the process of constitution of the Self, to both children and mothers. Studies that deepen this understanding aspect of the relationship between the mother and the child with ADHD should be encouraged, since this seems to be a promising way for the development of therapeutic strategies for this dyad suffering.

Em ano de eleição, as campanhas em favor de candidatos a diversos cargos políticos se intensificam, assim como a cobertura da mídia em razão dos eventos e das personalidades políticas vinculadas ao pleito eleitoral. Desta forma, esta dissertação propõe-se a investigar o discurso jornalístico, em especial o gênero reportagem de revistas semanais de informação de Brasil e Alemanha, no que diz respeito a duas importantes figuras políticas desses dois países em ano eleitoral, a saber, Dilma Rousseff e Angela Merkel. É nesse contexto que se inserem as publicações Época e Focus, cujos projetos gráficos, em princípio, possuem semelhanças. Foram selecionadas dez reportagens dessas revistas, sendo cinco para cada título. Partimos da hipótese de que, por meio de seu discurso, as publicações tentam projetar algum tipo de ethos, seja positivo ou negativo, dessas personalidades políticas a fim de persuadir seu leitor em um contexto eleitoral. A fim de verificarmos tal hipótese, foram adotados os suportes teóricos da análise do discurso e seus modos de organização, de Charaudeau (2010b), as formas de discurso relatado e modalização, de Maingueneau (1997, 2011), as concepções de ethos (Meyer, 2007; Amossy, 2008; Charaudeau, 2008), além das considerações sobre o jornalismo (Lage, 1985, 2001). Os resultados apontaram para o fato de que, por meio de procedimentos linguístico-discursivos, as imagens das candidatas projetadas pelas revistas são, de modo geral, negativas. Isso significa que ambas as revistas possuem um posicionamento a respeito das duas candidatas, e, com isso, moldam o seu discurso a fim de persuadir os seus leitores a respeito dessas figuras políticas / In election years, campaigns in favor of candidates to various public posts get more intense, as well as media coverage, due to the events and political personalities connected to the polls. This dissertation aims at investigating the journalistic discourse, specially the genre news report, in weekly magazines published in Brazil and Germany, as far as two important political figures of those two countries are regarded, viz., Dilma Rousseff and Angela Merkel. This is the context of Época and Focus, magazines that have points in common regarding their graphic projects. Ten news reports have been selected, five from each magazine. The hypothesis of this work is that, by means of their discourses, the magazines sought to create a type of ethos, either positive or negative, of those political personalities so as to persuade their reading public in the electoral period. In order to confirm the accuracy of that hypothesis, the theoretical supports of Discourse Analysis and its organization from Charaudeau (2010b); the forms of reported speech and modalization from Maingueneau (1997, 2011); the concepts of ethos (Meyer, 2007; Amossy, 2008; Charaudeau, 2008), as well as the considerations on journalism made by Lage (1985, 2001) were used. It was concluded that, by means of linguistic-discursive procedures, the images of the candidates built by the magazines are overall negative. This means that both of the magazines take stands regarding the candidates and therefore shape their discourse in order to persuade their readers so far as those public figures are considered

A Cohomologia de Hochschild é um invariante associado a álgebras o qual pode nos fornecer propiedades homologicas das álgebras e suas categorias de módulos. Além disso tem aplicações em Geometria Algébrica e Teoria de Representações, entre outras áreas. Para álgebras A sobre um corpo, o i-ésimo grupo de cohomologia de Hochschild HH^i(A,M) de A, com coeficientes no bimódulo M, coincide com Ext^i_{A^e}(A,M). Logo, este pode ser calculado usando uma resolução projetiva da álgebra como A-bimódulo. Diferentes autores como Dieter Happel, Claude Cibils, Edward Green, David Anick, Michael Bardzell e Andrea Solotar desenvolveram ferramentas para a construção destas resoluções em casos específicos. Um resultado recente e muito importante é apresentado por Andrea Solotar e Sergio Chohuy, onde se mostra a construção de uma resolução projetiva de bimódulos para álgebras associativas generalizando o resultado para álgebras monomiais feito por Bardzell. Nesta dissertação pretendemos introduzir ao leitor no conceito de Cohomologia de Hochschild mostrando a importância da mesma mediante resultados conhecidos para álgebras de dimensão finita. Além disso, apresentamos os conceitos e resultados do trabalho de Chohuy e Solotar mencionado acima. No decorrer deste trabalho complementamos algumas demonstrações dos resultados enunciados com o fim de propiciar uma ferramenta para o melhor entendimento dos tópicos trabalhados aqui. / The Hochschild Cohomology is an invariant attached to associative algebras which may provide us some homological aspects of the algebras and its category of modules. Moreover, it has applications to Algebraic Geometry and Representation Theory, among others areas. For algebras A over a field the Hochschild cohomology group HH^i(A,M) of A with coeficients in a bimodule M coincides with Ext^i_{A^e}(A,M). So it can be computed using a projective resolution of the algebra, as a bimodule over itself. Therefore different authors like Dieter Happel, Claude Cibils, Edward Green, David Anick, Michael Bardzell, Sergio Chohuy and Andrea Solotar developed tools for the construction of these resolutions in particular cases. A recent and very important result was introduced by Andrea Solotar and Sergio Chohuy, where they show a construction of a projective bimodule resolution for associative algebras generalizing the result for monomial algebras made by Bardzell. In this dissertation we intend to introduce the reader in the cohomology Hochschild concept, showing its importance through known results for finite dimensional algebras. Besides, we exhibit the concepts and results of Chohuy and Solotar mentioned before. During this text, we complement some demonstrations with the purpose of giving a tool for the a better understanding.