We apply the semidefinite programming method to obtain a new upper bound on the cardinality of codes made of subspaces of a linear vector space over a finite field. Such codes are of interest in network coding.Next, with the same method, we prove an upper bound on the cardinality of sets avoiding one distance in the Johnson space, which is essentially Schrijver semidefinite program. This bound is used to improve existing results on the measurable chromatic number of the Euclidean space.We build a new hierarchy of semidefinite programs whose optimal values give upper bounds on the independence number of a graph. This hierarchy is based on matrices arising from simplicial complexes. We show some properties that our hierarchy shares with other classical ones. As an example, we show its application to the problem of determining the independence number of Paley graphs.

Dans le domaine de l'automobile, Peugeot-Citroën, Renault et Daimler-Benz ainsi que de nombreux laboratoires ont fortement contribué à l'étude et à la recherche de systèmes de sécurité active. Ainsi, grâce au programme EUREKA Prometheus, ils ont pu présenter des prototypes capables de reconnaître les différentes composantes d'un environnement routier (obstacles, véhicules, piétons, panneaux routiers).<br /><br />Mon souhait est de développer un système d'assistance à la conduite permettant de détecter, de reconnaître et de localiser des panneaux routiers par vision monoculaire en étant capable de répondre aux contraintes temps réel de l'environnement dynamique. Cette thèse propose quelques contributions notamment une méthode de calibration de caméra complémentaire aux méthodes classiques permettant d'estimer les paramètres intrinsèques de la caméra.<br /><br />La localisation tridimensionnelle des formes polyédriques à partir de leurs projections sur un plan image est présentée au travers de deux contributions, l'une basée sur la résolution d'un système non linéaire par des techniques d'optimisation, l'autre basée sur la rétroprojection par géométrie projective inverse.<br /><br />Nous aborderons ensuite les traitements d'images utilisés afin d'extraire de l'image brute des informations qualitatives et quantitatives avec une contribution sur la segmentation des images<br />couleurs en temps réel.

Cette thèse a pour première vocation d'être un état de l'art sur le calcul quantique, sinon exhaustif, simple d'accès (chapitres 1, 2 et 3). La partie originale de cet essai consiste en deux approches mathématiques du calcul quantique concernant quelques systèmes quantiques : la première est de nature algébrique et fait intervenir des structures particulières : les corps et les anneaux de Galois (chapitre 4), la deuxième fait appel à la géométrie dite projective (chapitre 5). Cette étude a été motivée par le théorème de Kochen et Specker et par les travaux de Peres et Mermin qui en ont découlé

Despite predictions of Internet shopping reaching 6.9 trillion dollars by the end of 2004, research is now suggesting many online consumers are still very reluctant to complete the online shopping process. A number of authors have attributed consumers' reluctance to purchase online to apparent barriers, however, such barriers have not been fully examined within a theoretical context. While most studies of consumers' decision to shop on the Internet have focussed on key shopping determinants, this thesis builds a conceptual model grounded in consumer behaviour theory. In particular, this thesis explores the application of the perceived risk theoretical framework, specifically looking at one dimension of perceived risk theory - performance risk and the influence it has on the phenomenon of Internet Abandoned Cart Syndrome (ACS). To explore this phenomenon, a number of extrinsic cues are identified as playing a major role in the performance evaluation process of online purchases. The combination of these elements enabled the researcher to develop a conceptual model from which a series of propositions were drawn. To acquire pertinent data and investigate each proposition, this study used a combination of indirect and direct techniques, namely projective techniques in the form of a third-person vignette, a structured tick-box questionnaire and finally semi-structured interviews. The results suggest that collectively the extrinsic cues of brand, reputation, design and price have an overall impact on the performance evaluation process just prior to an online purchase. Varying these cues either positively or negatively had a strong impact on performance evaluation. The conclusion of this study suggests consumers are often unable to measure the full extent of risk-taking directly. In the majority of cases, consumers are guided by numerous factors, some intrinsic, others extrinsic. E-tailers with an established reputation, a well designed web site with known brands and a balanced pricing strategy reduce the perceived performance risks associated with purchasing online, thus reducing the occurrence of ACS.

À partir de la distinction opérée par G. Canguilhem (1966) entre la maladie du malade et celle du médecin, nous avons considéré les récits, constructions personnelles et représentations des patients relatifs à leur maladie cancéreuse et coexistants avec les théories scientifiques médicales. Ces éléments représentent un travail psychique d’élaboration qui peut donner naissance à un « roman de la maladie » (Gori, Del Volgo & Poinso, 1994). Cette quête de sens, que nous considérons comme un fondamental de l'existence, peut être mise à mal lorsque l’événement-maladie fait trauma pour le psychisme du patient, entravant alors l'historicisation de son vécu. Mais quid de cette quête à l'approche de la fin de vie ? Comment envisager et donner un sens à l'innommable, l'irreprésentable de sa propre mort (Freud, 1915)? Notre recherche vise à explorer l’évolution des processus d’élaboration en lien avec une mise en sens de l’événement-maladie, des représentations du cancer et de la mort et des processus défensifs mis à l’œuvre pour faire face à ce vécu effractant, entre deux groupes de patients, respectivement en phases curative et palliative de leurs traitements. Une première partie quantitative de notre travail a pour but d’objectiver sur le plan statistique, à l’aide d’outils psychométriques (IPQ-R et DSQ-40), des différences entre les deux groupes (composés de quarante-cinq patients chacun). La seconde partie, qualitative, consiste en une étude clinique et projective (Rorschach et T.A.T.), à partir de la rencontre avec dix patients (cinq de chaque groupe), des processus psychiques à l’œuvre face à la maladie somatique grave et à sa potentielle évolution létale. Notre questionnement touche ainsi à l'étude du « roman de la maladie » après le diagnostic et éventuellement au moment de l'approche de la fin de vie. La maladie grave peut sidérer l'appareil psychique et faire trauma dans certains cas, laissant dans certains autres des possibilités d'élaboration, malgré les représentations de cette pathologie associées socialement à la mort. Mais qu'en est-il lorsque la mort n'est plus affaire de représentation et prend valeur de réalité inéluctable (au sens d'une impossibilité de maintenir cette réalité inconsciente) ? / Starting with the distinction made by G. Canguilhem (1966) between the illness of the patient and the illness of the medical doctor, we have considered the narratives, patients’ personal constructions and representations regarding their cancer, co-existing with the medical and scientific theory. These elements are a psychical work of elaboration that can give birth to “a novel of the illness” (Gori, Del Volgo & Poinso, 1994). This quest for meaning, which we consider fundamental to any existence, can be tested when the illness-event creates a trauma in the psyche of the patient, hindering the elaboration of its history. What about this quest as the end of life approaches? The inconceivable of one’s own death (Freud, 1915) ?Our research explores the evolution of the elaborative processes linked to the quest of meaning of the illness-event, of the representations of cancer, of death and the defenses in place to deal with this frightening experience, comparing two groups of patients, respectively in curative and palliative phases of their treatment. Firstly, a quantitative part of our work is objectified statistically with psychometric tools (IPQ-R and DSQ-40), showing differences between the two groups (each group containing 45 patients). The second part is qualitative with clinical and projective data (Rorschach and T.A.T.) issued from 10 patients (5 of each group), showing the psychical processes of patients facing severe somatic illness and its potential lethal evolution. Our research investigates the “novel of the illness” after diagnosis and at the eventual approach of the end of life. Severe illness can freeze the psyche and be traumatic at times, leaving in certain cases elaborative capabilities, despite the social representation of the pathology associated with death. But what when death is no longer a matter of representation and becomes an undeniable fact (when it is impossible of maintaining this reality unconscious) ?

[pt] A proposta deste trabalho é apresentar e demonstrar o Porismo de Poncelet, tanto o caso base para triângulos quanto o caso geral para um polígono qualquer. Sendo o Porismo de Poncelet considerado um dos mais importantes teoremas da Geometria Projetiva, serão utilizados neste trabalho conceitos de Geometria Projetiva que muitas vezes não são familiares da maioria dos professores de matemática da rede básica de ensino. O caso base para triângulos juntamente com as cônicas podem ser bem explorados no ensino médio com a utilização de software de geometria como Geogebra que foi ferramenta fundamental na elaboração das figuras utilizadas nas demonstrações apresentadas nessa dissertação. / [en] The purpose of this work is to present and demonstrate the Poncelet s Porism, both the base case for triangles and the general case for any polygon. Being the Poncelet s Porism considered one of the most important theorems of Projective Geometry, we will use concepts of Projective Geometry that are not often familiar to most mathematics teachers in the basic teaching network. The base case for triangles together with the conics can be well explored in high school with the use of geometry software such as Geogebra that was a fundamental tool in the elaboration of the figures used in the demonstrations presented in this essay.

A camera calibration procedure corresponds to determine the digital geometric and optical characteristics of the camera from a known initial data set. This problem can be divided into three steps: a) acquisition of initial data; b) calibration process itself; and c) optimization. This work presents the development of a calibration tool based on a generic architecture for any calibration approach. For this aim, the presented system allows the personalization of each calibration step. In the proposed tool new calibration procedures are introduced dynamically, allowing a better integration between the modules of the system. / Fundação de Amparo a Pesquisa do Estado de Alagoas / Um processo de calibração de câmera consiste no problema de determinar as características geométricas digitais e ópticas da câmera a partir de um conjunto de dados iniciais. Este problema pode ser dividido em três etapas: aquisição de dados iniciais, o processo de calibração em si e otimização. Este trabalho propõe o desenvolvimento de uma ferramenta de calibração baseada em uma arquitetura genérica para qualquer processo de calibração. Para este propósito, o sistema apresentado neste trabalho permite a personalização de cada etapa da calibração. A inclusão de novos métodos de calibração é realizada de forma dinâmica, permitindo assim maior integração e flexibilidade entre os módulos do sistema.

The Rosenzweig Picture Frustration Study for adults has never had any created norms in terms of Czech population. Since the time of creation its graphical stimulus material became old and nearly unusable. The purpose of this text is to show the method P-F Study to the readers and than to introduce new version for adults PFT (C-W) prepared for publication. There is also a version presented on separate cards, which is part of the new set. The validity and test-retest reliability was verified previously, but reliability was also examined by agreement of two independent evaluators. The standardisation was realized on the sample of 300 persons in age from 18 to 81 years. The new norms were created for factors, categories, S-E patterns and GCR. Also the scoring and compilation of the scoring blank was adapted. Key words: aggression, frustration, projective method, Rosenzweig P-F Study, user's manual

The 7 Graphology Factors Scale is standardised for application in industry. A literature study based on the personality theories of Freud, Jung, Murray and Cattell precedes the empirical research. Graphology is conceptualised, relevant existing graphology models are explored and a graphology theory and method for use in industry proposes that graphology should be regulated and applications classified on the same basis as psychometric tests. The empirical research is based on a sample comprising 360 subjects, stratified according to gender, position and language. The written protocol is subject to analysis of 59 characteristics on the basis of the configuration of the writing. language is irrelevant and the presentation of an intervening stimulus is avoided. Factor analysis results in eight secondary factors. These are I Task Orientation - Directive, II Task Orientation- Conscientious, Ill Emotional Stability, IV Extroversion, V Independence, VI Conceptualisation, VII Openness to Experience and VIII Need for Power. Cronbach's alpha coefficient achieves 0, 61 for Factor I. Stepwise regression analysis provides correlations between factors of the Thematic Apperception, Structured Objective Rorschach and 16 Personality Factor tests with all but Factor Ill, which is hypothesised to be a new construct. Five of the factors are hypothesised to align with the Big Five Personality Model. Thr9e-way analysis of variance, t-tests and the Mantei-Haenszel tests are applied to establish differentiation based on the stratification criteria. Norm tables based on Indigenous, English and Afrikaans first language groups are provided in stens and bands. Conclusions are that graphology has a worthy theoretical heritage and offers benefits to the psychological profession and specifically industry, as part of an assessment strategy. limitations are outlined and recommendations are made for further research. / Industrial and Organisational Psychology / D.Litt. et Phil. (Industrial Psychology)

Made available in DSpace on 2015-05-15T11:46:16Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 578974 bytes, checksum: e512f47deae8cd03667ae8e7c2143b34 (MD5) Previous issue date: 2013-05-03 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The notions of connection and covariant derivative has its origin in the field of Riemannian geometry , where there is no distinction between them. In fact, in this study we found that these notions are equivalent if we consider modules over K-algebras of finite type. We also show that the existence of connections implies the existence of covariant derivative. The main goal of this study is to determine which modules admit connections. We easily verified that the projective modules admit connections. In fact, they form an affine space. But we also display a module that is not projective and has connection. Later, inspired by Swan's theorem, we explore in a straightforward way modules formed by sections of the tangent bundle of some surfaces in 3-dimensional real space. Finally, we study the notion of connection introduced by Alain Connes in modules over K-algebras not necessarily commutative. And we find in that context that the modules that have connection are exactly the projectives modules. / As noções de conexão e derivada covariante tem sua origem na área de geometria riemanniana, onde não existe distinção entre elas. De fato, nós verificamos neste trabalho, que estas noções são equivalentes se considerarmos módulos sobre K-álgebras comutativas de tipo finito. Também mostramos que a existência de conexões implica na existência de derivada covariante. O objetivo central deste trabalho é determinar que módulos admitem conexão. Verificamos facilmente que os módulos projetivos admitem conexões. De fato, elas formam um espaço afim. Mas também exibimos um módulo não projetivo que possui conexão. Posteriormente, inspirados pelo teorema de Swan, exploramos de maneira direta os módulos formados pelas seções do fibrado tangente de algumas superfícies no espaço 3- dimensional real. Por fim, estudamos a noção de conexão introduzida por Alain Connes em módulos sobre K-álgebras não necessariamente comutativas. E verificamos nesse contexto que os módulo que admitem conexão são exatamente os módulos projetivos.