Engineering assemblies are very frequently subject to fretting fatigue, which is a damage process that results when very small slip displacements arise at nominally stationary frictional interfaces. Fretting accelerates the initiation and early propagation of fatigue cracks, thereby causing significant reductions in the fatigue performance of many critical engineering components. A majority of the previous research on fretting fatigue has focused on incomplete (i.e. smooth-edged) contacts, while complete (i.e. sharp-edged) contacts have received less attention. The aim of this thesis is to contribute to the theoretical understanding of complete contacts, especially when they are subject to fatigue conditions. This problem is addressed in two separate ways. First, because fretting failures almost invariably initiate from the edge of contact, a detailed understanding of the conditions in this region should enable more accurate assessments of fatigue performance to be made. Thus, an asymptotic analysis is presented, which provides an accurate description of the contact edge under many conditions. This is done by using the elasticity solution for a semi-infinite notch to represent the state of stress near the contact edge in an asymptotic sense. Attention is then placed on the fact that cyclically loaded frictional contacts tend toward a steady-state response in which less frictional slip (and energy dissipation) occurs than in the first few load cycles. To investigate this effect, a numerical sub-structuring procedure is described, which significantly reduces the number of degrees of freedom in finite element models of frictional contact. This reduced model is then used to calculate the shakedown limit, i.e. the amplitude of cyclic load above which frictional slip is guaranteed to persist in the steady state. The sensitivity of the steady-state solution to the initial residual displacement state is then investigated, and it is shown that initial conditions can have a large influence on the steady-state behaviour of complete contacts.

Les structures mécaniques complexes résultent de l’assemblage de plusieurs composants, possédant souvent des propriétés mécaniques différentes, reliés à leurs interfaces par différents types de jonctions. L’hétérogénéité des comportements dynamiques de ces sous-structures et leurs sollicitations extérieures vont générer des efforts sur la structure principale et des accélérations importantes au niveau des équipements embarqués, affectant leur fonctionnement, leur fiabilité, leur sécurité. Il est alors nécessaire de les protéger en les isolant du reste de la structure.Ces travaux concernent la maîtrise des niveaux vibratoires et visent à fournir une méthode de caractérisation dynamique des interfaces entre différentes sous-structures. Celle-ci est ensuite intégrée dans une démarche visant à minimiser la puissance transmise entre des sous-structures sources et réceptrices.Une méthode de modes de flux de puissance a été développée, dont les valeurs et efforts propres fournissent, respectivement, des informations quantitatives et qualitatives sur les flux de puissance à l’intérieur d’une structure. Son application à l’étude de la puissance transmise entre deux sous-structures permet d’identifier les directions et les participations des principaux chemins de puissance transitant par les jonctions.Ces résultats ont été appliqués afin de proposer une méthodologie de conception robuste des interfaces de structures. Deux démarches d’optimisation ont été comparées visant à minimiser la puissance transmise par rapport aux paramètres de raideurs des jonctions. L’importance de considérer la robustesse de ces solutions a été soulignée par une approche complémentaire non-probabiliste. / Complex mechanical structures are composed of an assembly of several components, often exhibiting different mechanical properties and joined at their interfaces by different junction types. The various dynamic behaviours of these substructures and the applied external loadings generate important efforts on the main structure, resulting in high acceleration responses of the on-board equipments, affecting their performance, reliability and security. It is therefore necessary to protect them from these harsh conditions by isolating them from the rest of the structure.These researches are related to structural vibration control and aim at proposing a new method to dynamically characterize interfaces between different substructures. This method is then integrated to a robust design approach to minimize the power transmitted between a source and a receiver substructure. A power flow mode method has been developed, which allows determining eigenvalues and eigenvectors respectively representing qualitative and quantitative information on the power flowing inside the structure. This has been further applied to study the power transmitted at the interface, making it possible to identify the direction associated to the dominant power flow pattern and to quantify their contribution.These results have been applied to propose a robust design approach of structural interfaces. Optimization procedures have been implemented and compared to minimize the power transmitted between with respect to the interface stiffness parameters. The importance of considering the robustness of these solutions has been underlined by performing a complementary analysis based on a non-probabilistic approach.

La mise sous schéma insulinique multi-injections des patients diabétiques âgés est risquée et complexe. L’éventuelle perte d’autonomie induite par le traitement et la variabilité des besoins insuliniques doivent être prises en compte. Dans les protocoles thérapeutiques, le démarrage de l’insulinothérapie se base sur la prescription d’une posologie faible ajustée en fonction de résultats glycémiques. Un temps d’adaptation est donc nécessaire afin de prescrire la dose optimale. Pour ces raisons, cette thèse propose une méthodologie originale pour modéliser l’insulinothérapie chez les sujets âgés diabétiques de type 2 à partir de certaines variables endogènes (cliniques et biologiques) avec deux objectifs : 1. aider les médecins dans la phase de détermination de la prescription insulinique, 2. individualiser le traitement en fonction du profil physiologique du patient. La méthodologie, basée sur la logique floue, a permis l’analyse d’un échantillon de 71 diabétiques âgés de plus de 65 ans. Trois profils types de besoins insuliniques ont été mis en évidence et les variables discriminantes à l’origine de cette typologie ont été identifiées. La méthodologie s’inspirant du raisonnement à base de cas permet d’individualiser le traitement en proposant la dose à prescrire à partir des plus proches cas sélectionnés dans l’échantillon. Ces travaux apportent deux contributions principales : - sur l’insulinothérapie des personnes âgées diabétiques de type 2, - sur la méthodologie originale du traitement numérique des données médicales lors de suivis thérapeutiques. / Starting insulin therapy with daily multi-injections in the elderly type 2 diabetic patients is a difficult challenge. The possible loss of autonomy induced by the treatment and the variability of the insulin needs must be taken into account. In the therapeutic protocols, starting insulin therapy is based on the prescription of low dosage adjusted according to blood glucose results. A time of adjustment is therefore necessary to prescribe the optimal dose.For these reasons, this thesis proposes an original methodology for modeling insulin therapy in elderly subjects with type 2 diabetes from certain biological and clinical endogenous variables with two objectives:1. assist physicians at the stage of determination of insulin prescription, 2. individualize insulin treatment depending on the physiological profile of the patient. The methodology based on fuzzy logic, allowed the analysis of a sample of 71 diabetic patients aged over 65 years. Three profiles types of insulin requirements and the discriminating variables underlying this typology have been identified. Methodology based on case based reasoning allows individualizing the treatment to prescribe insulin dosage from the closest (nearest) cases selected in the sample.Our works provide two main contributions:- on insulin therapy in elderly type 2 diabetic patients, - on the original methodology of the digital process of medical data at therapeutic follow-ups.

Des études paléoécologiques suggèrent que la composition floristique, la structure et la répartition actuelle des forêts denses africaines ont été influencées par divers facteurs. En particulier, la mise en place de gradients écologiques à l’échelle du continent, depuis plusieurs millions d’années, a favorisé une spéciation parapatrique. Lors des changements climatiques passés, certaines régions qualifiées de « refuges forestiers » auraient été peu ou pas affectées par les variations climatiques, alors que les écosystèmes entre ces régions auraient été plus ou moins profondément remaniés, favorisant une spéciation allopatrique des espèces forestières. En Afrique l’identification des refuges forestiers et leur rôle dans la spéciation et dans la configuration des patrons de répartition géographique de la diversité génétique restent insuffisamment documentés.Cette problématique est abordée ici à travers le genre Khaya (Meliaceae), un genre modèle dont les espèces présentent des affinités écologiques variables. Ce travail multidisciplinaire, qui mobilise des approches botanique, phylogéographique et de modélisation de niches climatique, a pour objectifs (1) de préciser les limites taxonomiques des espèces de ce genre et de comprendre les événements de spéciation ayant conduit à la distribution et à la structuration actuelle de ces dernières ; (2) d'analyser les patrons phylogéographiques de Khaya anthotheca et de K. ivorensis ; (3) de tester la force de la relation entre les patrons de diversité génétique, les gradients écologiques et les refuges forestiers supposés du Plio-Pléistocène ; (4) d'identifier les niches climatiques potentielles de toutes les espèces de Khaya et la variation dans leur distribution géograhique au cours du temps.Nos résultats mettent en évidence : (i) la présence de cinq groupes génétiques disctincts dans le complexe K. anthotheca. L’analyse des caractères botaniques a conduit à l’identification des mêmes groupes, permettant de caractériser cinq espèces différentes. Trois de ces cinq espèces présentent des distributions allopatriques ou parapatriques, et deux d'entre elles se retrouvent localement en sympatrie, dont une espèce nouvelle pour la science ; (ii) une corrélation significative entre le chevauchement des niches, paire par paire, de ces cinq espèces et la distance génétique séparant chaque paire ; (iii) un contraste entre les zones de forte diversité du génome nucléaire et celles du génome cytoplasmique de K. ivorensis, qui ne permet pas de séparer clairement les populations malgré la présence de deux clusters génétiques dus à un isolement par la distance ; et (iv) la reconnaissance et la description de neuf espèces au sein du genre Khaya. Toutes ces nouvelles connaissances permettent d’éclairer la structuration de la biodiversité des forêts africaines et de poser les bases d'une stratégie de conservation et de gestion durable de ces espèces, très recherchées tant pour leur bois que pour des usages médicinaux. / Paleoecological studies suggest that the floristic composition, the structure and the current distribution of African dense tropical forests have been influenced by several factors. In particular, the establishment of ecological gradients at the scale of the continent over last several million years has favored parapatric speciation. Also, during past climatic changes, certain regions considered to be « forest refugia » are supposed to have been little (or not) affected by climatic variations, whereas ecosystems located between these regions were more or less profoundly modified, favoring allopatric speciation of forest species. Gaps remain in the identification of forest refugia in Africa, and their role in speciation and in shaping patterns in geographic distribution of genetic variation is insufficiently studied.These questions are addressed here in a study covering the genus Khaya (Meliaceae), a model genus whose species present variable ecological affinities. This multidisciplinary study, which mobilizes botanical, phylogeographic and climatic niche-modeling approaches, has the following objectives : (1) to define the taxonomic limits of species of the genus and to understand the speciation events that led to their current distribution and geographical genetic structuring ; (2) to analyze the phylogeographic patterns of Khaya anthotheca and of K. ivorensis ; (3) to test the force of the relationship between patterns of genetic diversity, ecological gradients and putative Plio-Pleistocene forest refugia ; (4) to identify the potential climatic niches of all species of Khaya and estimate how their geographic distributions shifted over time.Our results show the following : (i) the presence of five distinct genetic groups within the K. anthotheca complex. Analysis of botanical characters led to identification of the same groups, permitting the characterization of five different species. Three of these present allopatrique or parapatric distributions and two of them are locally found in sympatry, one of which is a species new to science ; (ii) a significant correlation between niche overlap, for each pair of these five species and the genetic distance separating each pair ; (iii) a contraste between zones of high diversity of the nuclear genome and zones of high diversity of the cytoplasmic genome of K. ivorensis, so that it is not possible to clearly separate the populations despite the presence of two genetic clusters owing to isolation by distance ; and (iv) the recognitiion, and the description of nine spcies in the gens Khaya.All this new knowledge sheds light on the structuring of biodiversity of African forests and contributes to laying the foundation for a strategy of conservation and sustainable management of these species, greatly sought after not only for their timber but also because of their medicinal uses.

Orientador: Maria Encarnação Beltrão Sposito / Banca: Everaldo Santos Melazzo / Banca: William Ribeiro da Silva / Resumo: Esta dissertação analisa a produção do espaço urbano e suas articulações com o mercado imobiliário, a partir da realidade concreta investigada na cidade de Londrina - PR. Os objetivos consistem em analisar a expansão da malha urbana e a evolução dos preços fundiários em Londrina, no fito de apreender o processo de valorização seletiva do espaço pelos mecanismos próprios do circuito imobiliário. Assim, a conjuntura da última década foi base do processo investigativo. No entanto, a compreensão da expansão físico-territorial da cidade de Londrina diz respeito às ações historicamente engendradas por agentes responsáveis pela produção do espaço urbano sob o modo capitalista de produção, quais sejam: os agentes privados, o Estado, e a sociedade civil. Desse modo, realizamos uma reflexão sobre a atuação dos incorporadores de loteamentos nas últimas quatro décadas, bem como da atuação do Estado na promoção da habitação e estruturação da cidade. Constituído esse quadro analítico, a compreensão volta-se ao estudo da evolução do preço da terra urbana a partir do levantamento e mapeamento das variáveis disponíveis nos classificados de terrenos do principal jornal de circulação local. Por fim, tratamos de analisar a estruturação do espaço urbano pela dinâmica da atividade imobiliária, investigando o caso mais específico da Zona Leste da cidade de Londrina, onde atualmente ocorre valorização imobiliária e incorporação de novos empreendimentos imobiliários bastantes elucidativos da reestruturação urbana contemporânea / Abstract: This dissertation examines the production of urban space and their interaction with the real estate market, from the reality investigated in Londrina - PR. The objectives are to analyze the expansion of urban land and price developments in Londrina, the aim of understanding the process of selective recovery of space by the mechanisms of the circuit housing. Thus, the conjuncture of the last decade was based on the investigative process. However, understanding the physical and territorial expansion of the city of Londrina with respect to shares historically engendered by agents responsible for the production of urban space under the capitalist mode of production, namely: the private agents, the state and civil society. Thus, we held a discussion on the role of developers of subdivisions in the last four decades, and the role of the state in housing promotion and structuring of the city. Consisting this analytical framework, the understanding back to the study of the evolution of urban land prices from the survey and mapping of the variables available in the classifieds of land from the main newspaper of local circulation. Finally, we analyzed the structure of urban space by the dynamics of real estate activity, investigating the more specific case of the Eastern Zone of the city of Londrina, where he currently is real estate appreciation and incorporation of new houses quite illustrative of contemporary urban restructuring / Mestre

A indústria automotiva vem mudando seu perfil drasticamente na última década, tornando-se mais intensiva em sistemas computacionais, e consequentemente em software, do que em sistemas mecânicos. A maioria das funcionalidades dos veículos modernos é controlada por software distribuído, dentro de muitas Unidades de Controle Eletrônicas (ECUs) interconectadas, de modo que o veículo pode ser considerado como um conjunto de sistemas complexos. Como resultado da integração, os testes para as funções de software distribuído se tornaram um grande desafio. Muitas estratégias têm sido propostas para organizar o multinível de teste de software em sistemas embarcados automotivos, a fim de reduzir custos e melhorar sua eficácia e robustez. Esta investigação pretende estender este conceito de teste de software multinível baseado no modelo em V, projetando uma metodologia sistemática que mapeie cada função dentro do sistema embarcado do veículo, sem a existência de uma especificação detalhada de cada componente e possibilitando a definição de uma estratégia e um planejamento de teste de software antecipadamente. Esta metodologia foi totalmente desenvolvida incorporando as características da aplicação automotiva, incluindo os requisitos de segurança funcional ISO 26262. Desta forma e dentro de rigorosas condições de segurança, a nova metodologia melhora a eficiência dos processos de desenvolvimento de sistemas embarcados, possibilitando a antecipação do planejamento de teste de software. Sendo este, baseado em um mapeamento e codificação da função e das atividades de teste proposto nesta tese, que funciona também como base para futuros desenvolvimento de soluções de rastreabilidade do sistema embarcado. / The automotive industry has been changing its profile drastically in the last decade, becoming more intensive in computer systems, and consequently in software, than in mechanical systems. Most of the functionality of modern vehicles is controlled by distributed software, within many interconnected Electronic Control Units (ECUs), so that the vehicle can be considered as a set of complex systems. As a result of integration, testing for distributed software functions has become a major challenge. Many strategies have been proposed to organize the multilevel software testing in embedded automotive systems in order to reduce costs and improve their effectiveness and robustness. This research intends to extend this concept of multilevel software testing based on the V development model, designing a systematic methodology that maps each function within the embedded system of the vehicle, without the existence of a detailed specification of each component, allowing the definition of a strategy and software testing planning in advance. This methodology was fully developed incorporating the characteristics of the automotive application, including the ISO 26262 functional safety requirements. In this way, the new methodology improves the efficiency of the embedded systems development processes, within strict security conditions, allowing the anticipation of the planning based on a mapping and encoding of the function and test activities proposed in this thesis, which also serves as a basis for future development of embedded system traceability solutions.

Esta pesquisa se dedica a questões conceituais da arte contemporânea implicadas na proposição intitulada Estruturação do Self, desenvolvida pela artista brasileira Lygia Clark entre 1978 e 1988, que se coloca num limite ambíguo entre a arte e a terapia. Por meio de perspectivas críticas é possível analisar determinados aspectos daquela experiência, seus desdobramentos, territórios e paradigmas, de modo a compreender melhor suas contribuições ao pensamento artístico contemporâneo. Esses aspectos dizem respeito à recepção estética da obra e sua relação com determinados públicos da arte; às maneiras de pensar e fazer arte; ao seu tempo; às possíveis aproximações com outros campos de conhecimento, tais como filosofia e psicologia; aos lugares em que a arte se apresenta (museu, galeria, ateliê, clínica); às questões éticas e políticas que movimenta; à produção crítica. Em suma, trata-se de perceber o que há de contemporâneo no trabalho de Lygia Clark e de revisitar o próprio pensamento artístico a partir dele. / This research engages in conceptual issues of contemporary art implicated in the entitled proposition Structuring of the Self, developed by the Brazilian artist Lygia Clark between 1978 and 1988, which puts itself in an ambiguous boundary between art and therapy. Through critical perspectives it is possible to analyze certain aspects of that experience, its development, territories and paradigms in order to better understand its contributions to the contemporary artistic thought. These aspects concern to the aesthetic reception of the work and its relation to a certain public of art; to the ways of thinking and doing art; to its own time; to the possible approaches with other areas of knowledge, such as philosophy and psychology; to the places where the art is presented (museum, gallery, atelier, clinic); to its ethical issues and policies; to the critical production. In short, it is about realizing what is of contemporary in the Lygia Clark\'s work and, from it, to review the artistic thought itself.

A tese discute o significado da produção de Habitação de Interesse Social na constituição do espaço urbano e metropolitano da região de Campinas. Parte do pressuposto de que a determinação de implantação das Habitações de Interesse Social em determinadas áreas das cidades por meio das políticas públicas é fundamental na estruturação urbana e metropolitana. A compreensão do quadro da expansão urbana através da produção e localização das Habitações de Interesse Social permite avaliar a importância das políticas habitacionais na constituição do desenho urbano e metropolitano. A partir de dados de fonte primária da produção de HIS nos vinte municípios da Região Metropolitana de Campinas, assim como de seus planos diretores, legislações referentes à habitação e do estudo da bibliografia pertinente, desenvolve-se análise de como essas políticas públicas se manifestaram no espaço físico da cidade, quais foram as lógicas da ocupação territorial e as relações entre as políticas habitacionais e a expansão metropolitana do território. O trabalho abrange o período que se estende de 1964, ano de criação do Banco Nacional de Habitação (BNH), até 2014, momento em que as implantações decorrentes do Programa Minha Casa Minha Vida, Lei Federal nº 11.977 de 2009, já são visíveis e perceptíveis. A pouca consideração, pelos diferentes municípios, da condição metropolitana, dos fluxos, dos processos de uso, ocupação e localização no território, resulta na elaboração de políticas públicas que, além de desarticuladas entre si e desconectadas enquanto territórios, não correspondem às realidades urbanas e metropolitanas da região de Campinas. Assim, ressalta-se o quanto as políticas habitacionais deixam de atender às questões colocadas pelo território e o quanto poderiam ser potencializadoras de uma melhor forma de expansão urbana do mosaico de municípios que compõem a RMC. / The thesis discusses the significance of the production of Housing of Social Interest in the Urban and metropolitan space of the Campinas region. It assumes that the Determination of the implementation of Social Interest Housing in certain areas of the Cities through public policies is fundamental in the urban structuring and Metropolitan Understanding the picture of urban expansion through production and Social Interest Rooms allows us to assess the importance of In the constitution of urban and metropolitan design. From source data Primary production of HIS in the twenty municipalities of the Metropolitan Region of Campinas, As well as its master plans, housing legislation and the study of Relevant bibliography, an analysis is developed of how these public policies Manifested in the physical space of the city, what were the logics of territorial occupation and Relations between housing policies and the metropolitan expansion of the territory. The work Covers the period extending from 1964, year of creation of the National Housing Bank (BNH), until 2014, at which time the implantations resulting from the Minha Casa Program My Life, Federal Law No. 11,977 of 2009, are already visible and noticeable. A little The different municipalities, of the metropolitan condition, of the flows, of the Processes of use, occupation and location in the territory, results in the elaboration of policies Which, in addition to being disarticulated between themselves and disconnected as territories, Correspond to the urban and metropolitan realities of the Campinas region. Like this, Housing policies fail to address the issues raised by Territory and how much could be leveraged for a better Of the mosaic of municipalities that make up the MRC.

Les agrocarburants connaissent un développement tous azimuts depuis le début des années 2000 en Afrique de l’Ouest, sans vision stratégique globale très claire et partagée par les acteurs concernés dans la plupart des pays. Or les stratégies et les interactions des acteurs publics et privés jouent un rôle important dans la construction des filières et de l’action publique. L’objet de cette thèse est d’analyser l’action publique décrite comme « l’ensemble des relations [jeu d’acteurs] plus ou moins institutionnalisées, des pratiques et des représentations qui concourent à la production politiquement légitimée de modes de régulation des rapports sociaux » au sein de la filière agrocarburants au Burkina Faso. Il s’est agi d’analyser l’influence du jeu d’acteurs dans l’émergence et la structuration de plusieurs modèles de filière et l’élaboration de la politique agrocarburant burkinabé. Cette thèse a cherché par ailleurs à analyser l’influence des perceptions des acteurs et leurs interactions dans la construction des arrangements institutionnels et des modes de gouvernance des filières. Enfin, à partir d’une analyse multicritère basée sur les perceptions par les acteurs des effets structurants potentiels des agrocarburants sur le développement du Burkina Faso, il a été mis en avant la faible influence de ces perceptions dans l’explication du paysage institutionnel actuel. / Biofuels have renewed a strong development since 2000 in West Africa countries without a clear and shared vision by all stakeholders. However, the strategies and interactions between public and private actors are important in the construction of these biofuels sector and policies. The purpose of this thesis is to analyze public action described as "all relations [stakeholder's interplay] more or less institutionalized, practices and representations that contribute to the production and regulation of social relations" in the development of biofuels in Burkina Faso. It analyzes the influence of stakeholder's interplay in the emergence and structuring of several biofuels sectors and policy development. This thesis has also sought to analyze the influence of actors perceptions and interactions in the construction of institutional arrangements and sector governance. Finally, from a multi-criteria analysis based on the actors perceptions on potential structuring effects of biofuels in Burkina Faso development, it was highlighted the influence of these perceptions in explaining the current institutional landscape.

Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2018-08-22T12:17:47Z No. of bitstreams: 1 Victor Vasconcelos Miranda.pdf: 1797186 bytes, checksum: 377d0c5524611a073b9d53302b46d98f (MD5) / Made available in DSpace on 2018-08-22T12:17:47Z (GMT). No. of bitstreams: 1 Victor Vasconcelos Miranda.pdf: 1797186 bytes, checksum: 377d0c5524611a073b9d53302b46d98f (MD5) Previous issue date: 2018-02-22 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This work aims to analyze the formation process of the ratio decidendi, as well as its applicability in Brazilian's civil procedural law from the introduction of the binding judicial precedents system fixed in the CPC/2015. The core of this study is focused on the construction of the ratio decidendi, through the establishment of its meaning in Brazilian law, as well as the settlement of parameters which we understand as necessary to its construction. In order to do this, we introduced the structuring vectors of the formation of the ratio decidendi. It is made, from these chosen vectors, a review of the leading opinion of the judgment and the decision-making process, in order to highlight the prominence of a dialogal and convergent relation between the argument of the judges to the establishment of a universalizable decision pattern. It has also analyzed the guidance of the courts in the delimitation of the ratio decidendi and the continuous process of redefinition of the ratio decidendi's incidence field and even its content. Furthermore, it has examined the problem of 'summarysme' in Brazilian law and how it is impossible to understand the complete spectrum of operation of the ratio decidendi based only on the summary. Finally, we have highlighted the operational dynamics of judicial precedents, analyzing the application process of the precedent through a dialogical relation between the litigants and the judge, with the intensification of the judgment recital in the analytical -rather than merely syllogistic or reductionist- use of the precedents system / O trabalho tem como objetivo analisar o processo de formação da ratio decidendi e sua aplicabilidade no direito processual civil brasileiro a partir da introdução do sistema de precedentes judiciais vinculantes previstos no CPC/2015. O cerne do estudo está consubstanciado na construção da ratio decidendi, mediante o estabelecimento de seu significado no direito brasileiro, assim como com o firmamento de parâmetros que reputamos necessários à sua construção. Para tanto, apresentamos os vetores estruturantes à formação da ratio decidendi. Faz-se, a partir dos vetores eleitos, uma releitura do voto condutor do acórdão e do processo decisório, a fim de se destacar a proeminência de uma relação dialogal e convergente de argumentos dos julgadores para o estabelecimento de um padrão decisório universalizável. Trabalhou-se também sobre o dirigismo dos tribunais na delimitação da ratio decidendi e o contínuo processo de ressignificação do campo de incidência e mesmo do conteúdo da ratio decidendi. Abordou-se, também o problema do ementismo no direito brasileiro e a inviabilidade de se depreender todo o espectro de atuação da ratio decidendi a partir da ementa. Por fim, destacamos a dinâmica operacional dos precedentes judiciais, abordando o processo de aplicação do precedente mediante uma relação dialógica das partes e do julgador, com o recrudescimento da fundamentação na utilização do sistema de precedente, de forma analítica e não simplesmente silogística e reducionista. PALAVRAS-CHAVES: precedentes judiciais – ratio decidendi – vetores estruturantes