Made available in DSpace on 2014-12-17T15:01:51Z (GMT). No. of bitstreams: 1 JoseNG_TESE.pdf: 4686361 bytes, checksum: ece8f07ff848703fdc4412907a924e10 (MD5) Previous issue date: 2010-04-08 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work aims at studying the influence of the concentration of calcite, its grain size and sintering temperature to obtain porous coating formulations that meet the design specifications. The experiments involved the physical-chemical and mineralogical caracterization of the raw materials, and mechanical tests on specimens dried and sintered, performing a planning mixture and factorial experiment, using the response surface methodology. The ceramic bodies studied were prepared by dry process, characterized, placed in conformity by uniaxial pressing and sintered at temperatures of 940 ? C, 1000?C, 1060?C, 1120?C and 1180?C using a fast-firing cycle. The crystalline phases formed during sintering at temperatures under study, revealed the presence of anorthite and wolastonite, and quartz-phase remaining. These phases were mainly responsible for the physical and mechanical properties of the sintered especimens. The results shown that as increases the participation of carbonate in the composition of ceramic bodies there is an increase of water absorption and a slight reduction in linear shrinkage for all sintering temperatures. As for the mechanical strength it was observed that it tended to decrease for sintering at temperatures between 940 ? C and 1060 ? C and to increase for sintering at temperatures above 1060 ? C occurring with greater intensity for compositions with higher content of calcite. The resistence decreased with increasing participation of quartz in all sintering temperatures. The decrease in grain size of calcite caused a slight increase in water absorption for formulation with the same concentration of carbonate, remaining virtually unchanged the results of linear shrinkage and mechanical strength. In conclusion, porous ceramic coating (BIII) can be obtained using high concentrations of calcite and keeping the properties required in technical standards and that the particle size of calcite can be used as tuning parameter for the properties of ceramic products. / Este trabalho objetiva estudar a influ?ncia da concentra??o de calcita, sua granulometria e temperatura de sinteriza??o na obten??o de formula??es para revestimento poroso que atendam as especifica??es da norma. Os experimentos envolveram a caracteriza??o f?sico qu?mica e mineral?gica das mat?rias-primas, e ensaios mec?nicos nos corpos de prova secos e sinterizados, precedendo-se de um planejamento de experimento de mistura e fatorial, com o uso da metodologia de superf?cie de resposta. As massas cer?micas estudadas foram preparadas pelo processo via seca, caracterizada, conformada por prensagem uniaxial e sinterizadas nas temperaturas de 940?C, 1000?C, 1060?C, 1120?C, e 1180?C utilizando um ciclo de sinteriza??o r?pido. As fases cristalina formadas durante a sinteriza??o nas temperaturas em estudo, revelaram a presen?a de anortita e wolastonita, al?m de quartzo com fase remanescente. Estas fases foram as principais respons?veis pelas propriedades f?sico-mec?nica dos corpos de provas sinterizados. Verificou-se que conforme se aumenta a participa??o do carbonato na composi??o das massas cer?micas ocorre um incremento de absor??o de ?gua e uma pequena redu??o da retra??o linear para todas as temperaturas de sinteriza??o. J? para a resist?ncia mec?nica houve uma tend?ncia de redu??o para sinteriza??o entre 940?C e 1060?C e aumento para sinteriza??o acima da temperatura de 1060?C ocorrendo com maior intensidade para formula??es com maior teor de calcita, e houve diminui??o da resist?ncia com o aumento da participa??o do quartzo em todas as temperaturas de sinteriza??o. A diminui??o da granulometria da calcita provocou um leve aumento na Absor??o de ?gua para formula??o com a mesma concentra??o desse carbonato mantendo praticamente inalterados os resultados de retra??o linear e resist?ncia mec?nica. Conclui-se que produtos cer?micos para revestimento poroso (BIII) podem ser obtidos utilizando altas concentra??es de calcita e mantendo-se as propriedades exigidas em normas t?cnicas e que a granulometria da calcita pode ser usada como par?metro de ajuste para as propriedades dos produtos cer?micos

Made available in DSpace on 2014-12-17T15:16:09Z (GMT). No. of bitstreams: 1 AdrianaJOB_DISSERT.pdf: 1566198 bytes, checksum: 766db20794ef85bc19aa4a81b03784d3 (MD5) Previous issue date: 2010-08-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / To the vertebrates, maintain body balance against the gravitational field and be able to orient themselves in the environment are fundamental aspects for survival, in which the participation of vestibular system is essential. As part of this system, the vestibular nuclear complex is the first central station that, by integrating many information (visual, proprioceptive), and the vestibular, assumes the lead role in maintaining balance. In this study, the vestibular nuclear complex was evaluated in relation to its cytoarchitecture and neurochemical content of cells and axon terminals, through the techniques of Nissl staining and immunohistochemistry for neuronal specific nuclear protein (NeuN), glutamate (Glu), substance P (SP), choline acetyltransferase (ChAT) (enzyme that synthesizes acetylcholine-Ach) and glutamic acid decarboxylase (GAD) (enzyme that synthesizes gamma-amino butyric acid-GABA). The common marmoset (Callithrix jacchus) was used as experimental animal, which is a small primate native from the Atlantic Forest in the Brazilian Northeast. As results, the Nissl technique, complemented by immunohistochemistry for NeuN allowed to delineate the vestibular nucleus superior, lateral, medial and inferior (or descending) in the brain of the common marmoset. Neurons and terminals immunoreactive to Glu and ChAT and only immunoreactive terminals to SP and GAD were seen in all nuclei, although in varying density. This study confirms the presence in the vestibular nuclei of the common marmoset, of Glu and SP in terminals, probably from the first order neurons of vestibular ganglion, and of GABA in terminals, presumably from Purkinge cells of the cerebellum. Second-order neurons of the vestibular nuclei seem to use Glu and Ach as neurotransmitters, judging by their expressive presence in the cell bodies of these nuclei in common marmosets, as reported in other species / Para os vertebrados, manter o equil?brio corporal contra o campo gravitacional e ser capaz de orientar-se no ambiente s?o aspectos fundamentais para a sobreviv?ncia, nos quais ? essencial a participa??o do sistema vestibular. Como parte deste sistema, o complexo nuclear vestibular ? a primeira esta??o central que, ao integrar v?rias informa??es (visual, proprioceptiva), al?m da vestibular, assume o papel principal na manuten??o do equil?brio. Neste estudo, o complexo nuclear vestibular do sagui foi avaliado com rela??o a sua citoarquitetura e conte?do neuroqu?mico de c?lulas e terminais ax?nicos, atrav?s das t?cnicas de colora??o de Nissl e imuno-histoqu?mica para prote?na neuronal nuclear espec?fica (NeuN), glutamato (Glu), subst?ncia P (SP), colina acetiltransferase (ChAT) (enzima de s?ntese da acetilcolina-Ach), e descarboxilase do ?cido glut?mico (GAD) (enzima de s?ntese do ?cido gama-amino-but?rico-GABA). Foi utilizado como animal experimental o sagui (Callithrix jacchus), um pequeno primata nativo da Mata Atl?ntica do Nordeste Brasileiro. Como resultados, a t?cnica de Nissl, complementada pela imuno-histoqu?mica para NeuN, permitiu delinear os n?cleos vestibulares superior, lateral, medial e inferior (ou descendente) no enc?falo do sagui. Neur?nios e terminais imunorreativos a Glu e ChAT e apenas terminais imunorreativos a SP e GAD foram vistos em todos os n?cleos, embora em densidade vari?vel. Este trabalho confirma a presen?a nos n?cleos vestibulares do sagui, de Glu e SP em terminais, provavelmente provenientes dos neur?nios de primeira ordem do g?nglio vestibular, e de GABA em terminais, supostamente provenientes das c?lulas de Purkinge do cerebelo. Neur?nios de segunda ordem dos n?cleos vestibulares parecem usar Glu e Ach como neurotransmissores, a julgar pela sua expressiva presen?a em peric?rios destes n?cleos no sag?i, como relatado em outras esp?cies

Made available in DSpace on 2014-12-17T15:36:41Z (GMT). No. of bitstreams: 1 RovenaCGJE_TESE.pdf: 3622694 bytes, checksum: f04b7feec9686941d276f158d103c97b (MD5) Previous issue date: 2013-06-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The circadian timing system (CTS) is responsible for the generation and synchronization and the suprachiasmatic nucleus (SCN) of the hypothalamus has been described as the major circadian pacemaker in many mammalian species. The internal temporal organization managed by SCN is disturbed with aging bringing many pathological disorders that range from loss of complex cognitive performance to simple physiological functions. Therefore, our aim was perform a comparative study of the morphological aspects and neurochemical composition in the SCN of marmosets (Callithrix jacchus) adults and older using immunohistochemical techniques. We found morphometric and neurochemical changes in th SCN o folder animals in comparison to adults, among these a possible decreased in retinal projection to the SCN of older animals, found through a decline in CTB immunostaining, which can occur due atrophy and/or decreasing of fibers from the retinohypothalamic tract (RHT). The Kl?ver-Barrera histological technique strongly suggests a decrease in those fibers from RHT. Also, by means of a morphometric study, it is found a atrophy and numerical decline of neurons in SCN of aged animals, investigated by Nissl technique, and immunostaining with NeuN and calbindin. Relative optical density (ROD) analysis were used to evaluate the expression of some neurochemical components in SCN, such as GFAP expression, which was increased in older, result that indirectly reinforces that morphological changes occurs due the aging; the vasoactive intestinal polipeptide (VIP) showed no expression alteration in SCN of older animals; the serotonin (5-HT) was descreased in the dorsomedial portion of the SCN, and neurpeptide Y (NPY) apparently also decrease due to the increase of age. Many of these modifications were seen in other animals, such as rodents, human primates and non-human primates. These data about marmoset comes to add new information of the effect of aging on structures responsibles for the circadian rhytmicity, and that some behavioral changes controlled by th SCN, and founded in aged animals, may be caused by these morphological and neurochemical changes. Although some results have been quantitatively negative, qualitatively all analysis show significant change comparing adult and older animals, perhaps due to a low sampling number. In conclusion, the marmoset presents several morphological and neurochemical changes in the SCN of aged animals compared to adults, which may result in behavioral changes that favor pathology aging related / O sistema de temporiza??o circadiana (STC) ? respons?vel pela gera??o e sincroniza??o dos ritmos circadianos e o n?cleo supraquiasm?tico (NSQ) do hipot?lamo tem sido descrito como o principal marca-passo circadiano em diversas esp?cies de mam?feros. A organiza??o temporal interna comandada pelo NSQ ? perturbada com o avan?o da idade trazendo in?meros transtornos patol?gicos que v?o desde a perda do desempenho cognitivo complexo a fun??es fisiol?gicas simples. Portanto, nosso objetivo foi fazer um estudo comparativo dos aspectos morfol?gicos e da composi??o neuroqu?mica no NSQ de saguis (Callithrix jacchus) adultos e idosos atrav?s de t?cnicas imunoistoqu?mica. Encontramos modifica??es morfom?tricas e neuroqu?micas no NSQ de animais idosos quando comparado aos adultos, dentre essas uma poss?vel diminui??o da proje??o da retina ao NSQ de animais idosos, encontrada atrav?s da diminui??o na imunomarca??o a CTB, que pode ocorrer devido uma atrofia e/ou diminui??o nas fibras provenientes do tracto retinohipotal?mico (TRH). A t?cnica histol?gica de Kl?ver-Barrera sugere realmente haver uma diminui??o dessas fibras que do TRH. Tamb?m ? visto, atrav?s de um estudo morfom?trico, diminui??o e atrofia no n?mero de neur?nios do NSQ de animais idosos, investigados por meio da t?cnica de Nissl, imunomarca??o a NeUN e a calbindina. An?lises por densidade ?ptica relativa (DOR) auxiliaram na avalia??o da express?o de alguns componentes neuroqu?micos do NSQ, como a express?o de GFAP, que foi aumentada em idosos, dado que indiretamente refor?a estar ocorrendo altera??es morfol?gicas decorrentes do envelhecimento; o polipet?deo intestinal vasoativo (VIP) que n?o mostrou altera??o na sua express?o no NSQ de aniamis idosos, a serotonina (5-HT) que se mostrou diminu?da na por??o dorsomedial do NSQ, e o neuropept?deo Y que aparentemente tamb?m diminuiu sua express?o em decorr?ncia do aumento da idade. V?rias dessas modifica??es foram vistas em outros animais roedores, primatas humanos e n?o humanos, o sagui vem adicionar novas informa??es sobre o efeito do envelhecimento nas estruturas respons?veis pela ritmicidade circadiana e que algumas altera??es comportamentais comandadas pelo STC e vistas em animais idosos podem ser provocadas por essas mudan?as morfol?gicas e neuroqu?micas. Embora alguns resultados tenham sido quantitativamente negativos, qualitativamente todas as an?lises mostram subst?ncial mudan?a ao se comparar animais adultos e idosos, talvez em decorr?ncia de um baixo n?mero de amostragem. Em conclus?o, o sagui mostra in?meras altera??es morfol?gicas e neuroqu?micas no NSQ de animais idosos quando comparado aos adultos, o que podem resultar em altera??es comportamentais que favorecem patologias relacionadas ao envelhecimento

Made available in DSpace on 2016-04-04T18:21:51Z (GMT). No. of bitstreams: 1 Ricardo Luis Galvao Rosal.pdf: 12441944 bytes, checksum: 88adf55d778bd93df79737558e12db80 (MD5) Previous issue date: 2009-02-17 / This work intends to analyze the open public central spaces, in the urban structuring of the city of Recife, to verify the existence of dialog between these spaces and metropolitan dynamics. Taking as the axis central research open spaces which are located in urban centers and have public use, the research used the territorial context of the city of Recife as a case study. After a conceptual search to consider the open public spaces as the uses and integral appropriation in the central area, it was investigated the open spaces located in the center of the city that resulted in the analysis of three public open spaces with a radius of influence in metropolitan areas. The Pra?a do Derby, Pra?a Rio Branco and the Parque 13 de Maio were investigated and chosen as the research focus the Pra?a do Derby, for being a nodal point of influence in dynamic metropolitan space contemporary and present characteristics of the sphere of public life. / Este trabalho tem como objetivo analisar os espa?os livres p?blicos centrais, na estrutura??o urbana da cidade do Recife, buscando verificar a exist?ncia de di?logo entre estes espa?os e a din?mica metropolitana. Tendo como eixo central da investiga??o os espa?os livres que est?o localizados nos centros urbanos e que possuem uso p?blico, a pesquisa utilizou-se do contexto territorial da cidade do Recife como estudo de caso. Ap?s uma busca conceitual que considerasse o espa?o livre p?blico como integrante dos usos e apropria??es da ?rea central, investigou-se o conjunto de espa?os livres localizados no centro da cidade do Recife, o que resultou na an?lise de tr?s espa?os livres p?blicos com raio de influ?ncia metropolitana. Ap?s investigar a Pra?a do Derby, a Pra?a Rio Branco e o Parque 13 de Maio, ficou escolhido como foco da pesquisa a Pra?a do Derby, por ser um ponto nodal de influ?ncia na din?mica espacial metropolitana e apresentar caracter?sticas contempor?neas da na esfera da vida p?blica.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2016-10-25T18:52:13Z No. of bitstreams: 1 2015 - Rayner Carvalho Pestana.pdf: 3842091 bytes, checksum: 6249d189977450bb8ee9dbbc3e59483d (MD5) / Made available in DSpace on 2016-10-25T18:52:13Z (GMT). No. of bitstreams: 1 2015 - Rayner Carvalho Pestana.pdf: 3842091 bytes, checksum: 6249d189977450bb8ee9dbbc3e59483d (MD5) Previous issue date: 2015-07-03 / The transformation of the Brazilian Public Management, specifically about the adoption of modern tools for human resources, has been happening since the last century and the concern about the introduction of meritocracy in career management is still considered a recurring theme. An evidence of that is the guidance from management and control department of federal state-owned companies to adopt meritocracy in their career management systems. The organization studied here, although already have passed thirteen years of validity of its current jobs and salaries plan, seems not yet to have been able to establish career management policies based on meritocracy. Due to the problem presented, the main objective of this research focused on raising the implications of the organizational context of a Brazilian federal state-owned company, dependent on the Treasury, for the introduction of meritocracy in career management. An applied qualitative research was carried out, configured in the form of a single case study to map the features of the current cultural, managerial and political contexts and to interpret their implications in the adoption of meritocracy as an organizational value. The research subjects were purposefully selected, among managers and career employees, and interviewed based on a script and from a photograph (photo elicitation) to reveal the current context. The field data were subjected to an inductive hermeneutic analysis. Based on these results, it can be inferred that meritocracy in career management, understood as ?a set of criteria, adopted by an organization that has on individual performance, effort and results, the fundamental pillars for granting promotions and progressions to its employees in their own careers?, is not yet explicitly manifested in the studied company. It was perceived that the company is set as a political arena type and that the current alternative process of granting promotions and progressions has been working as a fundamental mechanism for the on going internal power dynamics. On the context found, some manager actions were proposed to contribute to the implementation of meritocracy in career management. It can be considered, as a contribution to the field, the opportunity for reflecting on the negative implications of the penetration of management values in human resources, regarding: uncritical transfer of tools from the private sector to the public one; defense of entrepreneurship discourse that considers the career management as sole responsibility of the professional; only financial and quantitative focus on performance evaluations; and probability of management tools not resulting in professional development but only in the control and exploitation of the individual. For future research it is suggested i.e.: to investigate what commitment means to the organizational members in order to connect it to the company's concepts raised in the study; to analyze meritocracy from the psychological contract breach viewpoint; and to expand this study to other public organizations dependent or not on the Treasury, to ascertain the implications of cultural and managerial traits and the power dynamics for the adoption of meritocracy in career management. / A transforma??o da Administra??o P?blica Brasileira, no que tange ? ado??o de ferramentas modernas de gest?o de pessoas, vem ocorrendo desde o s?culo passado e a preocupa??o com a meritocracia na gest?o de carreira se configura como um assunto ainda recorrente. Como prova disso, destacam-se as orienta??es do ?rg?o de gest?o e controle das empresas estatais federais para que elas adotem a meritocracia nos seus sistemas de gest?o de carreira. A organiza??o aqui estudada, embora passados treze anos de vig?ncia do atual plano de cargos e sal?rios, parece ainda n?o ter conseguido instituir pol?ticas de gest?o de carreira calcadas na meritocracia. Diante do problema apresentado, o objetivo principal desta pesquisa se concentrou em levantar as implica??es dos tra?os provenientes do contexto organizacional de uma estatal federal brasileira, dependente do Tesouro Nacional, para a implanta??o da meritocracia na gest?o de carreira. Realizou-se pesquisa aplicada de natureza qualitativa, configurada em forma de estudo de caso ?nico para mapear os tra?os do contexto cultural, gerencial e pol?tico vigentes e interpretar suas implica??es na ado??o da meritocracia como um valor organizacional. Os sujeitos da pesquisa foram selecionados pelo m?todo proposital, entre gerentes e empregados de carreira, e entrevistados mediante roteiro e a partir de uma fotografia (elicita??o fotogr?fica) que revelasse o contexto vigente na ?tica dos mesmos. Os dados de campo foram qualitativamente analisados de forma hermen?utico-indutiva. Com base nos resultados obtidos, conclui-se que a meritocracia na gest?o de carreira, entendida como ?o conjunto de crit?rios, adotado por uma organiza??o, que possui no desempenho, no esfor?o individual e nos resultados alcan?ados os pilares fundamentais para a concess?o de promo??es e progress?es dos empregados em suas respectivas carreiras?, n?o ?, ainda, praticada explicitamente na empresa estudada. Revelou-se que a empresa se configura como uma organiza??o do tipo arena pol?tica e que o vigente processo alternativo de concess?o de promo??es e progress?es tem funcionado como um mecanismo fundamental na din?mica interna de poder. Diante deste contexto, foram propostas a??es de forma a contribuir com a implanta??o da meritocracia na gest?o de carreira. Considera-se como contribui??o ? ?rea a oportunidade de reflex?o sobre as implica??es da penetra??o de valores do management na gest?o de pessoas, relativas a: transfer?ncia acr?tica de ferramentas do setor privado para o p?blico; defesa do discurso do empreendedorismo, pressupondo a gest?o de carreira como responsabilidade unicamente do profissional; perspectiva apenas financeira e quantitativa das avalia??es de desempenho; e probabilidade das ferramentas de gest?o n?o resultarem no desenvolvimento profissional, mas no controle e explora??o do indiv?duo. Para aprofundamento em futuras pesquisas, sugere-se, dentre outras a??es: investigar o conceito de comprometimento na organiza??o, conectando-o ?s concep??es da Empresa levantadas no estudo; analisar a meritocracia a partir da ?tica da quebra do contrato psicol?gico; e expandir a presente pesquisa a outras organiza??es p?blicas dependentes ou n?o do Tesouro, a fim de evidenciar as implica??es dos tra?os culturais e gerenciais e da din?mica de poder existentes na ado??o da meritocracia na gest?o de carreira.

Made available in DSpace on 2016-04-04T18:36:41Z (GMT). No. of bitstreams: 1 Adilson Luis Giacomelli.pdf: 1037380 bytes, checksum: aa36e196bfaa0c849cd94bf8815dad7b (MD5) Previous issue date: 2003-12-16 / The proposal of an information management model is characterized as a capable way of supporting and directing the enterprise management system. For the study of this subject, it was chosen a sector of the Brazilian economy that was out of the patterns of the new products and businesses enterprises, classified as dot.com and, at the same time globalized, with high fluctuation of prices and demand, requiring integrated information. According to this, it is important to consider that the way of sustaining the basic columns of enterprise management, named statistical, economical and behavioral, needs supporting of the information management. In this way, some information models have been developed, according to the management techniques, to make possible a dynamic process for the maximization of the performance indicators of the organization. Nevertheless, in these models, it is considered that the communication of information is closely related to the individual performance and, therefore, related to the human subjectivity. Thus, the relationship between the information management and the segments of enterprise management systems, aligned with the strategy of the undertaking, incite competitive differential, assuring the increasingly improvement of the organization process. / A proposta de um modelo de gest?o da informa??o caracteriza-se como um meio capaz de sustentar e direcionar o sistema de gest?o empresarial. Para o estudo deste assunto, escolheu-se um setor da economia brasileira que estivesse fora dos padr?es das empresas de novos neg?cios e produtos, categorizados como dot.com, mas que, ao mesmo tempo, estivesse globalizado, com alta volatilidade de pre?os e demanda, por conseguinte, requerente de informa??es integradas. Diante disso, urge considerar que a forma de sustenta??o dos pilares b?sicos da gest?o empresarial, denominados como estat?sticos, econ?micos e comportamentais, necessita do apoio da gest?o da informa??o. Neste sentido, foram desenvolvidos alguns modelos informacionais que, em conformidade com as t?cnicas de gest?o, venham possibilitar um processo din?mico de maximiza??o dos indicadores de desempenho da organiza??o. Todavia, nestes modelos, considera-se que a comunica??o da informa??o est? condicionada ? atua??o de cada indiv?duo, portanto, associada ? subjetividade humana. Desta forma, a rela??o entre a gest?o da informa??o e os segmentos do sistema de gest?o empresarial, alinhados com a estrat?gia do empreendimento estimulam diferenciais competitivos, assegurando, assim, a melhoria cont?nua dos processos da organiza??o.

La période à 2.1 Ga du Craton d'Afrique de l'Ouest est une période de production massive de leucogranites. Le batholite de Ferkessédougou (Côte d'Ivoire) est, tant du point de vue de sa localisation, de son extension, que de son histoire dans la littérature géologique, un élément majeur de l'interprétation de la géodynamique du Paléoprotérozoïque. Tour à tour considéré comme un granite de ride augéosynclinale puis un granite typique de collision de type moderne, il n'en demeure pas moins le jalon d'un accident crustal NNE-SSW important du Paléoprotérozoïque : le linéament GFB (Greenville-Ferkessédougou-Bobodioulasso). Son étude et son interprétation s'inscrivent dans le débat sur la validité de la tectonique des plaques à cette période. Par analyse satellitale, nous montrons que ce batholite de 400 km de long sur une cinquantaine de large est en fait constitué d'une grande quantité de plutons adjacents relativement proches pétrographiquement. Le contexte général de son encaissant métavolcanique et/ou métasédimentaire birimien (2.2 Ga à 2.1 Ga) faiblement déformé et épizonal ainsi que l'absence de déformations tangentielles additionnelles traduisent la faiblesse de l'épaississement crustal synchrone de sa genèse. Sa fabrique déterminée par analyse structurale classique et par analyse de susceptibilité magnétique est double. La première "magmatique" est le plus souvent coaxiale, d'orientation et de pendages variables. Elle dessine des trajectoires courbes et traduit la mise en place des plutons. Elle est l'équivalent de ce qui a été rapporté à la déformation D1 autour de granites anciens. La seconde, magmatique à post-solidus, beaucoup mieux réglée, souvent constrictive ou non-coaxiale, est l'image d'un champ de contrainte régional transcurrent qui se rapporte à la déformation D2 classique dans la chronologie du craton birimien. Les plutons du batholite granitique de Ferké sont syntectoniques de cette grande phase de raccourcissement (2.1 Ga à 2.07 Ga) du birimien. Le passage en revue des différents modèles de plutons, l'analyse du secteur SW de la Côte d'Ivoire présentant des dykes granites à deux micas et des faciès métamorphiques de plus haut grade, un survol des formations de l'Imataca au Surinam, ainsi que le bilan de l'analyse structurale, nous amènent à proposer un modèle 3D pour le batholite de Ferké. Il correspondrait à un ensemble de petits plutons de forme laccolithique engagés dans la croûte superficielle entre les métasédiments épizonaux birimiens dits "de bassin", des gneiss et micaschistes probablement d'âge compris entre 2.2 et 2.1 Ga. Ces plutons seraient alimentés par un faisceau de dykes issus de la fracturation par ouverture en pull-apart du bassin sédimentaire SASCA-Bandama-Bobodioulasso. La fusion de la croûte essentiellement de type ceinture verte/TTG (absence de traces de matériel archéen), à la verticale du bassin subsident, aura incorporé du matériel sédimentaire de bassin. L'apport de chaleur nécessaire à la compensation de la faiblesse de l'épaississement aurait été fourni par le jeu décrochant des fractures majeures des pull-aparts. La place nécessaire à la mise en place des plutons exige une montée de ces derniers à la fin de la période extensive à la faveur de multiples cauldron-subsidences. Les conditions et régimes des deux déformations principales impliquent un lapse de temps très court entre la stabilisation de l'ouverture des bassins et leur fermeture. Par ailleurs, la variation du niveau structural du Nord-Est vers le Sud-Ouest, en particulier vers la zone probable de l'équivalent-racine au Vénézuéla-Surinam, montre un approfondissement et le rapprochement d'une croûte archéenne vers le SW alors qu'elle n'était jusqu'à présent reconnue que vers l'Ouest (Guinée, Dorsale de Man) ou soupçonnée vers l'Est au Ghana.

Στην παρούσα διπλωματική εργασία αναζητείται ένας αυτόματος τρόπος ελέγχου, του επιπέδου της εκπεμπόμενης ισχύος προς το εσωτερικό του ανθρωπίνου σώματος. Εκεί μέσα βρίσκεται κάποιο ενεργό ιατροτεχνολογικό εμφύτευμα. Αυτό το εμφύτευμα στην περίπτωση της εργασίας αυτής, ήταν μία κάψουλα που καταγράφει με φωτογραφίες το γαστρεντερικό σύστημα καθώς οι περισταλτικές κινήσεις του εντέρου προωθούν την κάψουλα προς την έξοδο. Οι φωτογραφίες μεταδίδονται προς καταγραφικό που βρίσκεται έξω από το σώμα με ασύρματο τρόπο. Όπως καταλαβαίνουμε η κάψουλα αυτή αλλά και οποιοδήποτε άλλο ενεργό ιατροτεχνολογικό εμφύτευμα έχει ενεργειακές ανάγκες για την απρόσκοπτη λειτουργία του. Αυτές οι ανάγκες καλύπτονται με ασύρματη μετάδοση ενέργειας. Οι καινοτομίες που υπάρχουν σ’ αυτήν την εργασία είναι οι εξής: 1. Όσον αφορά το εξωτερικό τροφοδοτικό χρησιμοποιήθηκε ένας αντιστροφέας συντονισμού κλάσης D 2. Το πιο καινοτόμο στοιχείο είναι η δημιουργία κλειστού βρόχου ελέγχου μεταξύ του εξωτερικού τροφοδοτικού και του εμφυτεύματος ώστε αυτό να λαμβάνει την ποσότητα της ενέργειας που χρειάζεται κάθε στιγμή. 3. Επίσης σημαντικό είναι ότι η μετάδοση πληροφορίας από το εμφύτευμα προς τα έξω δεν γίνεται με μία ξεχωριστή συχνότητα αλλά χρησιμοποιώντας αρχές παθητικής τηλεμετρίας. Η εργασία αυτή πέρα από την θεωρητική προσέγγιση υλοποιήθηκε και πρακτικά σε εργαστήρια του πανεπιστημίου KUL (ESAT MICAS) στο Βέλγιο. Ο Βρόγχος ελέγχου λειτούργησε και πολλά συμπεράσματα εξάχθηκαν για περεταίρω βελτιώσεις. Η δομή του παρόντος πονήματος είναι ως εξής: Μετά την αρχική εισαγωγή το δεύτερο κεφάλαιο μας δίνει ένα θεωρητικό υπόβαθρο για την ασύρματη μετάδοση ενέργειας. Στη συνέχεια τα διάφορα μέρη των ηλεκτρονικών κυκλωμάτων που αναπτύχθηκαν αναλύονται διεξοδικά στα επόμενα κεφάλαια. Τέλος καταγράφονται τα συμπεράσματα και προτείνονται πιθανές βελτιώσεις για το μέλλον. / In this diploma thesis a way to have an automated control of the transmitted power level into the human body is sought. Inside the body there is an active medical implant. This implant in the case of this project is a swallowable capsule-camera that captures images along the GI tract as the peristaltic propulusion of the bowel push the capsule towards the exit. The photos are transmitted wirelessly to a special recording device that is located out of the body. It is obvious that not only this capsule but any other active medical implant needs energy to operate uninterrupted. This necessary energy is given through inductive power transmission. Innovations in this project are these: 1. The power supply outside the body is realized with Class-D resonant inverter topology. 2. The most innovative is the effectuation of closed control loop between the outer power supply and the implant in order to be received from the implant the exact amount of power that is needed every instant. 3. Also significant is that the transmission of data from the implant to the controlled power supply is not be done with a different carrier but using passive telemetry principles. Beyond the theoretic approximation that was made for this project, it was also realized in KUL university laboratories (ESAT MICAS) in Belgium. The closed control loop functioned properly and conclusions for further development are inferred. The structure of this diploma thesis is as follows: After the starting introduction the theoretic background for wireless inductive power transmission is given in chapter 2. Following, the different parts of the electronic circuits that were developed are analyzed comprehensively in next chapters. Finally conclusions are registered and future improvements are proposed.