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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
611

Un wiki sémantique pour la gestion des connaissances décisionnelles - Application à la cancérologie

Meilender, Thomas 28 June 2013 (has links) (PDF)
Les connaissances décisionnelles sont un type particulier de connaissances dont le but est de décrire des processus de prise de décision. En cancérologie, ces connaissances sont généralement regroupées dans des guides de bonnes pratiques cliniques. Leur publication est assurée par des organismes médicaux suite à un processus d'édition collaboratif complexe. L'informatisation des guides a conduit à la volonté de formaliser l'ensemble des connaissances contenues de manière à pouvoir alimenter des systèmes d'aide à la décision. Ainsi, leur édition peut être vue comme une problématique d'acquisition des connaissances. Dans ce contexte, le but de cette thèse est de proposer des méthodes et des outils permettant de factoriser l'édition des guides et leur formalisation. Le premier apport de cette thèse est l'intégration des technologies du Web social et sémantique dans le processus d'édition. La création du wiki sémantique OncoLogiK a permis de mettre en œuvre cette proposition. Ainsi, un retour d'expérience et des méthodes sont présentés pour la migration depuis une solution Web statique. Le deuxième apport consiste à proposer une solution pour exploiter les connaissances décisionnelles présentes dans les guides. Ainsi, le framework KCATOS définit un langage d'arbres de décision simple pour lequel une traduction reposant sur les technologies du Web sémantique est développée. KCATOS propose en outre un éditeur d'arbres, permettant l'édition collaborative en ligne. Le troisième apport consiste à concilier dans un même système les approches pour la création des guides de bonnes pratiques informatisés : l'approche s'appuyant sur les connaissances symbolisée par KCATOS et l'approche documentaire d'OncoLogiK. Leur fonctionnement conjoint permet de proposer une solution bénéficiant des avantages des deux approches. De nombreuses perspectives sont exposées. La plupart d'entre elles visent à améliorer les services aux utilisateurs et l'expressivité de la base de connaissances. En prenant en compte le travail effectué et les perspectives, un modèle réaliste visant à faire du projet Kasimir un système d'aide à la décision complet est proposé.
612

Temperature-compensated silicon-based bulk acoustic resonators

Tabrizian, Roozbeh 12 January 2015 (has links)
Microelectromechanical resonators have found widespread applications in timing, sensing and spectral processing. One of the important performance metrics of MEMS resonators is the temperature sensitivity of their frequency. The main objective of this dissertation is the compensation and control of the temperature sensitivity of silicon resonators through engineering of device geometry and structural composition. This has been accomplished through formation of composite platforms or novel geometries based on dispersion characteristics of guided acoustic waves in single crystalline silicon (SCS) microstructures. Furthermore, another objective of this dissertation is to develop efficient longitudinal piezoelectric transduction for in-plane resonance modes of SCS resonators that have lithographically-defined frequencies, to reduce their motional resistance (Rm). A uniformly distributed matrix of silicon dioxide pillars is embedded inside the silicon substrate to form a homogenous composite silicon-oxide platform (SilOx) with nearly perfect temperature-compensated stiffness moduli. Temperature-stable micro-resonators implemented in SilOx platform operating in any desired in- and out-of-plane resonance modes show full compensation of linear temperature coefficient of frequency (TCF). Overall frequency drifts as small as 80 ppm has been achieved over the industrial temperature range (-40°C to 80°C) showing a 40x improvement compared to uncompensated native silicon resonators. A 27 MHz temperature-compensated MEMS oscillator implemented using SilOx resonator demonstrated sub-ppm instability over the industrial temperature range. Besides this, a new formulation of different resonance modes of SCS resonators based on their constituent acoustic waves is presented in this dissertation. This enables engineering of the acoustic resonator to provide several resonance modes with mechanical energy trapped in central part of the resonator, thus obviating narrow tethers traditionally used for anchoring the cavity to the substrate. This facilitates simultaneous piezoelectric-transduction of multiple modes with different TCFs through independent electrical ports, which can realize highly accurate self-temperature sensing of the device using a beat frequency (fb) generated from linear combination of different modes. Piezoelectrically-transduced multi-port silicon resonators implemented using this technique provide highly temperature-sensitive fb with a large TCF of ~8500 ppm/°C showing 100x improvement compared to other Quartz/MEMS counterparts, suggesting these devices as highly sensitive temperature sensors for environmental sensing and temperature-compensated/oven-controlled crystal oscillator (TCXO/OCXO) applications. Another part of this dissertation introduces a novel longitudinal piezoelectric transduction technique developed for implementation of low Rm silicon resonators operating in lithographically defined in-plane modes. Aluminum nitride films deposited on the sidewalls of thick silicon microstructures provides efficient electromechanical transduction required to achieve low Rm. 100 MHz SCS bulk acoustic resonators implemented using this transduction technique demonstrates Rm of 33Ω showing a 100x improvement compared to electrostatically transduced counterparts. Low-loss narrow-band filters with tunable bandwidth and frequency have been implemented by electrical coupling of these devices, showing their potential for realization of truly reconfigurable and programmable filter arrays required for software-defined radios.
613

Effective language use in academic study material for L2 speakers of English at a distance learning institution

Vergie, Malvin Patrick 03 1900 (has links)
Thesis (MPhil (General Linguistics))--University of STellenbosch, 2010. / ENGLISH ABSTRACT: The gap which exists between the academic culture represented by lecturers and the nonacademic- culture represented by students at a residential university is even greater at a distance learning institution (DLI). At a DLI, lecturers and students are faced with a number of challenges. Firstly, the majority of distance learning students are older than the average residential student and have added responsibilities related to their families and jobs. Secondly, they come from a wider variety of cultural, educational and socio-economic backgrounds than residential first-years. Finally, the majority of these students have a relatively low proficiency in their second language (L2) English, which is usually their third or fourth language rather than their second language, and which is the language of instruction at South African DLIs. At a DLI, there is little or no face-to-face contact between lecturers and students, and teaching takes place primarily by means of printed study material, specifically study guides. Study guides substitute for the lectures and other contact periods that residential students receive. In addition, study guides have to facilitate the student in the world of a new and sometimes intimidating culture, namely the (tertiary) academic culture. However, many students may have trouble understanding the type of language used in study material (essentially, academic language), sometimes because lecturers do not understand the challenges faced by DLI students and/or because they write in a formal, academic style, which is often not easily accessible to first-year students. This could pose a barrier for learning, as well as for the transition of the student from the non-academic culture to the academic culture. The aim of the study reported in this thesis was to identify the linguistic criteria which a successful study guide for L2 speakers of English should adhere to. These criteria were extracted from literature on effective writing/teaching in general, then discussed in terms of their relevance for the specific purpose of writing effective study guides, and finally applied to critically evaluate the language used in three DLI study guides. The thesis ends with some concluding remarks, a discussion of the implications of the findings of the research, and some recommendations for further research. / AFRIKAANSE OPSOMMING: Die gaping tussen die akademiese kultuur wat verteenwoordig word deur dosente en die nieakademiese kultuur wat verteenwoordig word deur studente by 'n residensiële universiteit is selfs groter by 'n afstandsonderriginstelling (AOI). By 'n AOI kom studente en dosente voor 'n aantal uitdagings te staan. Eerstens is die oorgrote meerderheid afstandsonderrigstudente ouer as die gemiddelde student aan 'n residensiële universiteit en het hulle bykomende verantwoordelikhede met betrekking tot hul gesinne en werkplekke. Tweedens kom hulle uit 'n wyer verskeidenheid van kulturele, opvoedkundige en sosio-ekonomiese agtergronde as eerstejaarstudente van residensiële universiteite. Ten laaste is die meerderheid van hierdie studente se taalvaardigheid in hulle tweedetaal (T2) Engels relatief laag. In die meeste gevalle is Engels hulle derde of vierde taal eerder as hul tweede taal, terwyl dit ook die taal van onderrig is by Suid-Afrikaanse AOIs. By 'n AOI is daar geen of min persoonlike kontak tussen dosente en studente, en onderrig vind meestal plaas deur middel van gedrukte studiemateriaal, veral studiegidse. Studiegidse dien as plaasvervanger vir die voorlesings en ander kontaksessies wat 'n student by 'n residensiële universiteit ontvang. Ook moet studiegidse die student voorthelp in die wêreld van die nuwe en soms intimiderende kultuur, die (tersiêre) akademiese kultuur. Tog sukkel baie studente om die tipe taal (akademiese taal) wat in die studiemateriaal gebruik word te verstaan, wat soms veroorsaak word deur dosente wat nie 'n goeie begrip het van die uitdagings wat AOI-studente in die gesig moet staar nie, en/of omdat hulle in 'n formele, akademiese styl skryf wat nie maklik toeganklik vir eerstejaarstudente is nie. Dit kan 'n struikelblok vir leer wees, sowel as vir die oorgang van die student vanaf die nie-akademiese kultuur na die akademiese kultuur. Die doel van die studie waaroor daar verslag gelewer word in hierdie tesis was om die linguistiese kriteria te identifiseer waaraan 'n suksesvolle studiegids vir T2 sprekers van Engels moet voldoen. Hierdie kriteria is afgelei uit die literatuur oor effektiewe skryf/onderrig oor die algemeen, en vervolgens bespreek in terme van hulle relevansie vir die spesifieke doel van die skryf van effektiewe studiegidse. Laastens is hierdie kriteria gebruik om die taalgebruik in drie AOIstudiegidse krities te evalueer. Die tesis word afgesluit met enkele slotopmerkings, 'n bespreking van die implikasies van die bevindinge van die navorsing, en enkele aanbevelings vir verdere navorsing.
614

Numerical study of optical properties of single and periodic nanostructures : from nanoantennas to enhanced transmission metamaterials / Etude numérique des propriétés optiques de nanostructures uniques et périodiques : des nano- antennes aux méta-matériaux à transmission

Al-Aridhee, Tahseen 16 June 2016 (has links)
L ’intérêt des nano-particules pour le domaine de l ’optique visible a été suscité lors du premier rapport rédigé par Faraday en 1857 et qui a initié les bases de la production de nanoparticules métalliques en vue de leur propriété optiques inattendues (coloration des solutions). Plus récemment, le contrôle et le guidage de la lumière basés sur l’excitation de résonance plasmon dans les nanostructures a permis beaucoup d’applications liées à la vie quotidienne et impliquant la lumière. La résonance plasmonique de structures métalliques estun phénomène essentiel qui conduit à des propriétés optiques uniques à travers l’interaction de la lumière avecles électrons libres du métal. L’excitation de la résonance plasmon localisé (LSPR) permet d’exalter localement l’énergie électromagnétique comme dans le cas des nano-antennes mais aussi d’acheminer la lumière à travers des canaux de dimensions sub-l sur de grandes distances distances grâce à l’excitation du Plasmonde Surface Propagatif (PSP). Au cours de cette thèse, nous avons étendu un algorithme existant afin de calculer la réponse optique (sections efficaces de diffusion et d’absorption) de NPs ayant une forme géométrie quelconque. Ce type de NP anisotrope (vis-à-vis de la polarisation incidente) peut présenter à la résonance plasmonique une section efficace de diffusion 25 fois supérieure à celle géométrique. De plus, une étude systématique importante a été effectuée afin d’optimiser la géométrie de tels Nps.En ce qui concerne la PSP qui est impliqué dans la transmission exaltée à travers les matrices d’ouvertures annulaires AAA, nous avons entrepris une étude systématique des propriétés de l’excitation du mode particul particulier sans coupure de ces nano - guides. Il s’agit du mode Transverse Electrique et Magnétique (TEM). Une étude numérique complète est alors effectuée pour correctement concevoir la structure avant qu’elle ne soit expérimentalement fabriquée et caractérisée. Pour palier certaines contraintes expérimentale, une structure inclinée est proposée et étudiée dans le cas d’un métal parfaitement conducteur. Nous avons démontrée numériquement et analytiquement certaines propriétés intrinsèques de la structure montrant un coefficient de d’au moins 50% d’un faisceau incident non polarisé indépendamment des conditions d’éclairage (polarisation,angle et plan d’incidence). Lorsque le mode TEM est excité, le flux laminaire de l’énergie à travers la structure présente une déviation géante sur de très petites distances inférieures à la longueur d’onde. Les résultats présentés dans cette thèse pourraient être considérés comme une contribution importante à la compréhension du phénomène de transmission exaltée basé sur l’excitation de ce type de mode guidé. / The release of the rst report by Faraday in 1857 set the foundation of the production of metal nanoparticlesand their unexpected optical properties (coloring). More recently, controlling and guiding light via plasmonicresonance in nanostructures enable a lot of applications affecting everyday life that involves light. Plasmonresonance of metallic structures is a key phenomenon that allows unique optical properties through the interactionof light with the free electrons of the metal. The excitation of Localized Surface Plasmon Resonance(LSPR) leads to turn-on large local enhancements of electromagnetic energy as within antennas or to routelight as waveguide to desired region with high transmission through the excitation of Propagating SurfacePlasmon (PSP). During this thesis, we have developed an existing algorithm in order to calculate the opticalresponse of NPs of any shape. We have especially determined the localized energy enhancement factor interm of optical response of nano-antenna. This anisotropic (polarization dependent) NPs type can feature, atplasmon resonance, scattering efciency factor higher than 25. Moreover, an important systematic study hasbeen performed in order to optimize design of such NPs.Concerning the PSP that are involved in the enhanced transmission through Annular Aperture Arrays (AAAs),we systematically study the properties of the excitation of the peculiar Transverse ElectroMagnetic (TEM) guidedmode inside such nano-apertures. A complete numerical study is performed to correctly design the structurebefore it is experimentally characterized. For reasons associated to fabrication constraints and efciency,a slanted AAA made in perfectly conducting metal is proposed and studied. We numerically and analyticallydemonstrate some intrinsic properties of the structure showing a transmission coefcient of at least 50%ofan un-polarized incident beam independently of the illumination configuration (polarization, angle, and planeof incidence). At the TEM peak transmission, the laminar flow of the energy through the structure can exhibitgiant deviation over very small distances ( ). The results presented in this thesis could be considered as animportant contribution to the understanding of the enhanced transmission phenomenon based on the excitationof guided modes
615

Toda boa mãe deve... : governamento das maternidades para a constituição de infâncias saudáveis e normais

Santos, Cláudia Amaral dos January 2009 (has links)
Le but de cette recherche est d'étudier comment le livre La vie de bébé, peut-être le plus grand et le plus connu manuel de l'enfance au Brésil, écrit par le pédiatre Rinaldo de Lamare, favorise ou a encouragé des biopolitiques adressées aux mères sur la constitution de l'enfance d'une façon saine et normale. Je tiens à souligner que l'importance de l'analyse de ce manuel a joué /joue un rôle éducatif, en enseignant des mères et des pères comment agir avec leurs enfants, c'est-à-dire comment doivent-ils les nourrir, quels types d'ambiances et des jouets ils doivent leur fournir de manière à produire des subjectivités, des identités et des savoirs. Pour ce faire, la théorie sur les études culturelles a été utilisé à partir d'un regard post-structuraliste, ainsi que les études de Foucault, en particulier les notions de biopolitique, de gouvernement, de savoir/pouvoir et de discipline. La 17e (1963) et la 41e (2002) éditions ont été utilisées comme matériel de l'analyse dont l„objectif est de souligner quelles stratégies discursives ont été utilisées par l'auteur du livre, un médecin avec beaucoup de connaissance médicale notamment sur la pédiatrie, pour conduire le comportement maternel et paternel; quels savoirs et pouvoirs mis en circulation dans la subjectivité des parents ont été utilisés pour la promotion des enfants sains et en bonne santé; comment le Manuel ici considéré se constitue comme une technologie pour le gouvernement des familles et de l'enfance depuis près de sept décennies; à travers quelles stratégies l'expert promouvait des biopolitiques pour les mères; comment caractérisait-on les sujets enfantins considérés normaux et anormaux et quels étaient les modèles de famille, de mère, de père, de l'éducation des enfants élus dans cette publication . De l'analyse, on a vérifié la force du discours de la psychologie comme une façon de rendre les mères subjectives; l'exaltation de l'allaitement maternel dans les dernières décennies comme le seul moyen pour nourrir le bébé physiquement et « sur son plan émotif »; la centralité de la mère dans la vie du bébé et son rôle comme la responsable de tout ce qui se produit à l'enfant; l'adresse de la publication aux mères hétérosexuels, mariés, blanches, issues des classes moyenne et aisée et des zones urbaines, bien que les pères soient également cités dans les dernières éditions comme étant des figures importantes pour le bébé et, enfin, la vision évolutive du développement normal de l'enfant dans la publication étudiée. / Essa pesquisa tem por objetivo investigar como o livro "A Vida do Bebê", talvez o maior e mais conhecido manual de infância do Brasil, escrito pelo pediatra brasileiro Rinaldo De Lamare, promove/promoveu biopolíticas dirigidas às mães para a constituição de infâncias saudáveis e normais. Ressalto o quanto o manual analisado desempenhou/desempenha uma função pedagógica, ensinando mães e pais a como agir com suas/seus filhas/filhos, como devem alimentá-los, que ambientes e brinquedos lhes devem proporcionar, assim produzindo subjetividades, identidades e saberes. Para a realização da análise, foram utilizados, como referencial teórico, os Estudos Culturais, a partir de um olhar pós-estruturalista, e os estudos de Foucault, principalmente os conceitos de biopolítica, governamento, saber/poder e disciplina. Como material de análise foram utilizadas duas edições do manual, a saber, a 17ª edição (de 1963) e a 41ª edição (de 2002), procurando-se enfatizar por meio de quais estratégias discursivas o autor do livro, investido do saber médico, em específico o pediátrico, conduzia as condutas maternas e paternas; quais os saberes e os poderes colocados em circulação na subjetivação materna e paterna para a promoção de crianças normais e saudáveis; como o manual aqui analisado constitui-se como tecnologia para o governo das famílias e das infâncias ao longo de quase sete décadas e através de que estratégias o especialista promovia biopolíticas dirigidas às mães; como eram caracterizados os sujeitos infantis tidos como normais e anormais e quais eram os modelos de família, mãe, pai, educação e criança promovidos na publicação. A partir da análise verificou-se a força do discurso da psicologia como forma de subjetivar as mães; a exaltação da amamentação nas últimas décadas como única forma de alimentar física e "emocionalmente" o bebê; a centralidade da mãe na vida do bebê, sendo esta responsabilizada por tudo que ocorrer com a criança; o endereçamento da publicação a mães heterossexuais, casadas, brancas, de classe média e alta e urbanas, embora nas últimas edições os pais tenham sido mais citados como também importantes para o bebê; e, por fim, a visão evolutiva do desenvolvimento da criança normal na publicação ora objeto de estudo. / This work aims at investigating how the book "A Vida do Bebê", probably the largest and major children's guide in Brazil, written by Brazilian paediatrician Rinaldo de Lamare, has encouraged biopolicies targeted to mothers for normal healthy early lives. I highlight to what extent the analysed guide has played its instructive role, teaching parents how to behave with their children, how to feed them, which environment and toys they should provide them, thus producing subjectivities, identities and knowledge. To conduct the analysis we have used as a theoretical referential the Cultural Studies from a poststructuralist perspective, and Foucauldian studies, particularly concepts of biopolicy, government, knowledge/power and discipline. We have used as analysis materials two issues of the guide 17th edition (1963) e 41st edition (2002), seeking to emphasise on which discursive strategies the author used as a doctor, specifically a paediatrician, to guide parents' behaviours; which pieces of knowledge and power were circulating in parents' subjectification to promote normal healthy children; how the analysed guide has been a tool to govern families and children throughout nearly seven decades, and which strategies the specialist encouraged biopolicies targeted to mothers; how infant-subjects were regarded normal and abnormal, and which were the models of family, mother, father, education and child provided in the book. With the analysis we have checked the strength of the psychological discourse as a way to subjectify mothers; extolling breast-feeding late decades as the only way to physically and 'emotionally' feed the baby; the mother's centrality in the baby's life when she is blamed for everything occurring to the child; the sending of the book for homosexual, married, white, high- and middle-class, and urban mothers, though in late editions fathers have also been mentioned as significant for the baby; and finally the evolutionary vision for the normal child's development in the book which is now the object of this work.
616

Women after divorce : exploring the psychology of resilience

Boon, Christine 31 August 2005 (has links)
This study investigates the role of resilience in women coping with the life transition of divorce. Five women were interviewed and an in-depth qualitative analysis undertaken, in order to explore the subjective experience of resilience during the period of separation and divorce, and its effect on post-divorce adjustment. In addition, the usefulness of formal divorce support groups to enhance resilience was examined. It was found that the most important aspects of resilience as reported by the women were social support; spirituality; personality traits such as optimism, courage and resourcefulness; an orientation toward the future; and competence/mastery of one's environment (including mastery of one's thoughts and emotions). It appeared that resilience facilitated adjustment in several ways; notably in providing a sense of purpose, control and competence resulting in an experience of personal growth. All of the women felt that they had developed a sense of their own identity and greater self-determination through the process of divorce. Support groups might be potentially effective in providing assistance in dealing with emotional issues such as anger and forgiveness; with skills development such as emotion regulation and cognitive techniques like reframing; as well as practical and informational support. Such groups might also provide a temporary community of social support where divorced women can interact with other people who are experiencing the same things. The study illuminated the subjective, often unique experience of separation and divorce; this emphasises the challenge for divorce groups to offer support which addresses this uniqueness. / Psychology / D.Litt. (Psychology)
617

The role of three-body forces in few-body systems

Masita, Dithlase Frans 25 August 2009 (has links)
Bound state systems consisting of three nonrelativistic particles are numerically studied. Calculations are performed employing two-body and three-body forces as input in the Hamiltonian in order to study the role or contribution of three-body forces to the binding in these systems. The resulting differential Faddeev equations are solved as three-dimensional equations in the two Jacobi coordinates and the angle between them, as opposed to the usual partial wave expansion approach. By expanding the wave function as a sum of the products of spline functions in each of the three coordinates, and using the orthogonal collocation procedure, the equations are transformed into an eigenvalue problem. The matrices in the aforementioned eigenvalue equations are generally of large order. In order to solve these matrix equations with modest and optimal computer memory and storage, we employ the iterative Restarted Arnoldi Algorithm in conjunction with the so-called tensor trick method. Furthermore, we incorporate a polynomial accelerator in the algorithm to obtain rapid convergence. We applied the method to obtain the binding energies of Triton, Carbon-12, and Ozone molecule. / Physics / M.Sc (Physics)
618

Méthode de mesure tridimensionnelle active appliquée au contexte de l’analyse endoscopique ou coloscopique / Three dimensional measurement method in the context of endoscopic or coloscopic analysis

Dupont, Erwan 10 July 2015 (has links)
Cette thèse, consacrée à la mesure endoscopique de formes tridimensionnelle, se place dans un double contexte applicatif : tout d'abord industriel, avec l'inspection endoscopique de pièces mécaniques en milieu contraint (notamment tubulaire) à des résolutions micrométriques. Le second contexte est médical avec la détection de formes tridimensionnelle lors de coloscopies pour l'aide au diagnostic. L'endoscopie souple est obtenue par l'utilisation de guides optiques, la méthode de mesure tridimensionnelle est basée sur la stéréovision active avec la génération de lumière structurée par une matrice de micro-miroirs. Après avoir établi l'état de l'art, une méthode de conception et d'évaluation optique appliquée à la stéréovision en endoscopie souple est décrite. C'est ensuite la réalisation instrumentale, son évaluation métrologique, et une méthode innovante de basculement de modes dynamique entre stéréovision active et passive qui sont détaillées. Des méthodes algorithmiques de reconstruction tridimensionnelle adaptées à ce type d'instrument sont enfin proposées. Les contributions scientifiques de cette étude sont multiples. Une méthode d'analyse optique basée sur l'utilisation de fonctions de transfert de modulation pour la conception d'un endoscope mesurant par stéréovision est proposée. Des méthodes de traitement d'image pour un étalonnage robuste malgré une défocalisation optique ainsi qu'un nouvel algorithme à décalage de phase constituent également des contributions de l'étude. L'association de ces méthodes a permis d'extraire un principe de réalisation permettant la mesure tridimensionnelle par endoscopie souple. / This thesis aims at developing a tri-dimensional measurement endoscopic device in a double context: the first one is industrial with endoscopic inspection of mechanical pieces (tubular inspection, for example) at micrometric resolution. The second context is medical with tri-dimensional shape detection during colonoscopy to help the surgeon diagnosis. In this study, flexible endoscopy is made possible by using image guides and the tri-dimensional reconstruction method is based on active stereovision where a digital micro-mirror device is used to spatially structure the incoming light. After developing the state of the art, an optical conception and evaluation method, applied to stereovision for flexible endoscopic devices is described. The instrumental realization is then detailed and metrologically evaluated. An innovative method that allows to switch dynamically between active and passive stereovision is then detailed. Finally, 3D reconstruction algorithms adapted to this endoscopic instrument are proposed. The scientific contributions of this study are multiple. Firstly, an optical analysis method based on the modulation transfer function to design an endoscopic stereovision system is proposed. An image processing method for robust calibration in a defocused optical environment and a new phase-shifting algorithm for 3D reconstruction are proposed. Finally, a realization principle for 3D measurement in flexible endoscopy was extracted from the combination of all these methods.
619

Toda boa mãe deve... : governamento das maternidades para a constituição de infâncias saudáveis e normais

Santos, Cláudia Amaral dos January 2009 (has links)
Le but de cette recherche est d'étudier comment le livre La vie de bébé, peut-être le plus grand et le plus connu manuel de l'enfance au Brésil, écrit par le pédiatre Rinaldo de Lamare, favorise ou a encouragé des biopolitiques adressées aux mères sur la constitution de l'enfance d'une façon saine et normale. Je tiens à souligner que l'importance de l'analyse de ce manuel a joué /joue un rôle éducatif, en enseignant des mères et des pères comment agir avec leurs enfants, c'est-à-dire comment doivent-ils les nourrir, quels types d'ambiances et des jouets ils doivent leur fournir de manière à produire des subjectivités, des identités et des savoirs. Pour ce faire, la théorie sur les études culturelles a été utilisé à partir d'un regard post-structuraliste, ainsi que les études de Foucault, en particulier les notions de biopolitique, de gouvernement, de savoir/pouvoir et de discipline. La 17e (1963) et la 41e (2002) éditions ont été utilisées comme matériel de l'analyse dont l„objectif est de souligner quelles stratégies discursives ont été utilisées par l'auteur du livre, un médecin avec beaucoup de connaissance médicale notamment sur la pédiatrie, pour conduire le comportement maternel et paternel; quels savoirs et pouvoirs mis en circulation dans la subjectivité des parents ont été utilisés pour la promotion des enfants sains et en bonne santé; comment le Manuel ici considéré se constitue comme une technologie pour le gouvernement des familles et de l'enfance depuis près de sept décennies; à travers quelles stratégies l'expert promouvait des biopolitiques pour les mères; comment caractérisait-on les sujets enfantins considérés normaux et anormaux et quels étaient les modèles de famille, de mère, de père, de l'éducation des enfants élus dans cette publication . De l'analyse, on a vérifié la force du discours de la psychologie comme une façon de rendre les mères subjectives; l'exaltation de l'allaitement maternel dans les dernières décennies comme le seul moyen pour nourrir le bébé physiquement et « sur son plan émotif »; la centralité de la mère dans la vie du bébé et son rôle comme la responsable de tout ce qui se produit à l'enfant; l'adresse de la publication aux mères hétérosexuels, mariés, blanches, issues des classes moyenne et aisée et des zones urbaines, bien que les pères soient également cités dans les dernières éditions comme étant des figures importantes pour le bébé et, enfin, la vision évolutive du développement normal de l'enfant dans la publication étudiée. / Essa pesquisa tem por objetivo investigar como o livro "A Vida do Bebê", talvez o maior e mais conhecido manual de infância do Brasil, escrito pelo pediatra brasileiro Rinaldo De Lamare, promove/promoveu biopolíticas dirigidas às mães para a constituição de infâncias saudáveis e normais. Ressalto o quanto o manual analisado desempenhou/desempenha uma função pedagógica, ensinando mães e pais a como agir com suas/seus filhas/filhos, como devem alimentá-los, que ambientes e brinquedos lhes devem proporcionar, assim produzindo subjetividades, identidades e saberes. Para a realização da análise, foram utilizados, como referencial teórico, os Estudos Culturais, a partir de um olhar pós-estruturalista, e os estudos de Foucault, principalmente os conceitos de biopolítica, governamento, saber/poder e disciplina. Como material de análise foram utilizadas duas edições do manual, a saber, a 17ª edição (de 1963) e a 41ª edição (de 2002), procurando-se enfatizar por meio de quais estratégias discursivas o autor do livro, investido do saber médico, em específico o pediátrico, conduzia as condutas maternas e paternas; quais os saberes e os poderes colocados em circulação na subjetivação materna e paterna para a promoção de crianças normais e saudáveis; como o manual aqui analisado constitui-se como tecnologia para o governo das famílias e das infâncias ao longo de quase sete décadas e através de que estratégias o especialista promovia biopolíticas dirigidas às mães; como eram caracterizados os sujeitos infantis tidos como normais e anormais e quais eram os modelos de família, mãe, pai, educação e criança promovidos na publicação. A partir da análise verificou-se a força do discurso da psicologia como forma de subjetivar as mães; a exaltação da amamentação nas últimas décadas como única forma de alimentar física e "emocionalmente" o bebê; a centralidade da mãe na vida do bebê, sendo esta responsabilizada por tudo que ocorrer com a criança; o endereçamento da publicação a mães heterossexuais, casadas, brancas, de classe média e alta e urbanas, embora nas últimas edições os pais tenham sido mais citados como também importantes para o bebê; e, por fim, a visão evolutiva do desenvolvimento da criança normal na publicação ora objeto de estudo. / This work aims at investigating how the book "A Vida do Bebê", probably the largest and major children's guide in Brazil, written by Brazilian paediatrician Rinaldo de Lamare, has encouraged biopolicies targeted to mothers for normal healthy early lives. I highlight to what extent the analysed guide has played its instructive role, teaching parents how to behave with their children, how to feed them, which environment and toys they should provide them, thus producing subjectivities, identities and knowledge. To conduct the analysis we have used as a theoretical referential the Cultural Studies from a poststructuralist perspective, and Foucauldian studies, particularly concepts of biopolicy, government, knowledge/power and discipline. We have used as analysis materials two issues of the guide 17th edition (1963) e 41st edition (2002), seeking to emphasise on which discursive strategies the author used as a doctor, specifically a paediatrician, to guide parents' behaviours; which pieces of knowledge and power were circulating in parents' subjectification to promote normal healthy children; how the analysed guide has been a tool to govern families and children throughout nearly seven decades, and which strategies the specialist encouraged biopolicies targeted to mothers; how infant-subjects were regarded normal and abnormal, and which were the models of family, mother, father, education and child provided in the book. With the analysis we have checked the strength of the psychological discourse as a way to subjectify mothers; extolling breast-feeding late decades as the only way to physically and 'emotionally' feed the baby; the mother's centrality in the baby's life when she is blamed for everything occurring to the child; the sending of the book for homosexual, married, white, high- and middle-class, and urban mothers, though in late editions fathers have also been mentioned as significant for the baby; and finally the evolutionary vision for the normal child's development in the book which is now the object of this work.
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Turismo de base comunitária : análise quanto às interferências do turismo de pesca no Baixo Rio Branco, Roraima, Brasil

Vitório, Luciana de Souza 05 November 2014 (has links)
A região do baixo rio Branco está localizada ao sul do município de Caracaraí, no estado de Roraima, onde há mais de uma década vem se desenvolvendo atividades de turismo de pesca, dentro da Área de Proteção Ambiental (APA) Xeriuini. A vila Terra Preta está inserida nesta APA e tem seus moradores contratados para trabalharem como guias de pesca na atividade turística. Este estudo tem como objetivos: identificar o perfil dos moradores da comunidade de Vila Terra Preta; avaliar qual o estágio de desenvolvimento da atividade de turismo de pesca praticada na região do Baixo Rio Branco; identificar as interferências causadas pela atividade de turismo de pesca que afetam as condições de vida dos residentes da Vila Terra Preta; analisar a receptividade e o envolvimento dos autóctones em relação às atividades desenvolvidas pelos operadores de turismo na região. Fez-se uso de questionário como instrumento de pesquisa exploratória com abordagem quantitativa e qualitativa, chegando a resultados que mostram interferências positivas quanto à geração de empregos e complemento de renda, mesmo que esses postos de trabalhos sejam temporários. Mas, por outro lado interferências prejudiciais à população de peixes devido aos equipamentos usados por turistas/pescadores, percebidas por alguns moradores. Também o turismo não tem contribuído para melhorias na infraestrutura da comunidade e em relação à gestão os entrevistados consideram-se excluídos dos processos de decisão e participação na organização da atividade turística. / Submitted by Ana Guimarães Pereira (agpereir@ucs.br) on 2015-11-27T17:23:22Z No. of bitstreams: 1 Dissertacao Luciana de Souza Vitório.pdf: 6543086 bytes, checksum: 3442d27d6c966d7514f071dbcca37c02 (MD5) / Made available in DSpace on 2015-11-27T17:23:22Z (GMT). No. of bitstreams: 1 Dissertacao Luciana de Souza Vitório.pdf: 6543086 bytes, checksum: 3442d27d6c966d7514f071dbcca37c02 (MD5) / The region of the lower Rio Branco is located south of the city of Caracaraí in the state of Roraima, where for more than a decade has been developing fishing tourism activities within the Environmental Protection Area (EPA) Xeriuini. The Vila Terra Preta is inserted in this EPA and its residents have hired to work as fishing guides in tourist activity. This study aims to: identify the profile of the residents of the Vila Terra Preta; assess what stage of development of the activity of fishing tourism practiced in the Lower Rio Branco region; identify the interference caused by the activity of fishing tourism that affect the living conditions of the residents of Vila Terra Preta; analyze the responsiveness and involvement of indigenous in relation to activities undertaken by tourism operators in the region. Made use of a questionnaire as a tool for exploratory research with quantitative and qualitative approach, achieving results that show positive interference as the generation of jobs and income supplement, even if those jobs are temporary jobs. But, on the other hand harmful interference to fish population due to the equipment used by tourists/fishermen, perceived by some locals. Also tourism has not contributed to improvements in community infrastructure and the management respondents consider themselves excluded from decision- making and participation in the organization of tourism.

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