Submitted by Erika Demachki (erikademachki@gmail.com) on 2016-08-17T19:30:08Z No. of bitstreams: 3 Tese - Bento Alves Araújo Jayme Fleury Curado - 2016 - parte 01.pdf: 8216015 bytes, checksum: b26a2741c99b6bd90d9c2937456cd1e8 (MD5) Tese - Bento Alves Araújo Jayme Fleury Curado - 2016 - parte 02.pdf: 17423217 bytes, checksum: d50e57acde8435bfa561e22851b05ac0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-08-18T14:14:00Z (GMT) No. of bitstreams: 3 Tese - Bento Alves Araújo Jayme Fleury Curado - 2016 - parte 01.pdf: 8216015 bytes, checksum: b26a2741c99b6bd90d9c2937456cd1e8 (MD5) Tese - Bento Alves Araújo Jayme Fleury Curado - 2016 - parte 02.pdf: 17423217 bytes, checksum: d50e57acde8435bfa561e22851b05ac0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2016-08-18T14:14:00Z (GMT). No. of bitstreams: 3 Tese - Bento Alves Araújo Jayme Fleury Curado - 2016 - parte 01.pdf: 8216015 bytes, checksum: b26a2741c99b6bd90d9c2937456cd1e8 (MD5) Tese - Bento Alves Araújo Jayme Fleury Curado - 2016 - parte 02.pdf: 17423217 bytes, checksum: d50e57acde8435bfa561e22851b05ac0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016-07-12 / The work entitled Inventory of ashes: Embers dormant literary production of the Cerrado in Goiás discusses minutiae in the formation of a literary ideas about Biome Territory heart of Brazil. It focuses on the search for a cultural identity of goianos people regarding the environment in which they live. Rediscusses different literary styles such as short story, novel, chronic, poem, novels, with the identification of a society focused on itself. Their analysis and the timing thereof satisfied the time. Each author with his work, was analyzed to discuss the Cerrado and its different modalities. The research was literature and documents on primary source for the elucidation of the theme and serve henceforth as a subsidy to teachers both of Geography, as Literature. / O trabalho intitulado Inventário das cinzas: Brasas dormentes da produção literária sobre o Cerrado em Goiás busca discutir em minúcias a formação de um ideário literário sobre o Bioma Território do coração do Brasil. Centra-se na busca por uma identidade cultural dos povos goianos no que tange ao meio ambiente em que vivem. Rediscute diferentes estilos literários como conto, romance, crônica, poema, novelas, com a identificação de uma sociedade centrada em si mesma. A análise dos autores e a cronologia dos mesmos 781 obedeceu ao critério do tempo. Cada autor, com sua obra, foi analisado ao discutir o Cerrado e suas diferentes modalidades. A pesquisa foi bibliográfica e por documentos em fonte primária para a elucidação do tema e servir, doravante, como subsídio a professores tanto da Geografia, quanto da Literatura.

The subject of this study is the period of independent banking in Cornwall, from the formation of the Miners’ Bank in Truro in 1771 to the absorption of Dingley’s Launceston Bank by the National Provincial in 1922. Undertaken within the perspectives of the `New’ Cornish Studies, it aims to provide an assessment of the objectives, strategies, and operational decision-making of banking institutions in Cornwall. A comprehensive analytical narrative of their development forms the core of the study, building on the existing literature and augmented from a range of fragmentary primary and secondary sources, much of it from family archival papers. The nature of this material, and the general lack of quantitative financial data relating to individual institutions, has made a qualitative sociological approach the most appropriate. With the careers of individual bankers predominant, the narrative is also strongly biographical in content and emphasis. An analytical technique based on thick description has been used to enlarge upon the possibilities contained in the often meagre evidence. Both the historical narrative and the subsequent theoretical analysis are conducted from a standpoint situated within a Cornish bank; established in Geertzian fashion from the author’s own long commercial experience in a traditionally-minded business. This experience is aligned with that of contemporaneous writers on nineteenth-century banking practice. In similar manner, a theoretical standpoint within the contemporaneous sociological thought of Tönnies and Weber has been adopted, as being the most appropriate to the consideration of the forms of organization under investigation. From this standpoint, the analysis is projected forwards into the growing corporatism and branch expansion of the amalgamation era. This is undertaken through a game-theoretic evolutionary assessment of decision processes; and a consideration of the roles of path creation and path dependency in institutional development.

Face à la raréfaction des énergies fossiles, l’industrie automobile se trouve dans l’obligation de réduire la consommation des véhicules. L’une des idées est de récupérer l’énergie perdue sous forme d’échauffements grâce à la thermoélectricité. L’objectif de ces travaux est l’implantation d’un module thermoélectrique au niveau du radiateur afin d’en récupérer la chaleur dans le cadre d’un projet de recherche financé par Valéo Systèmes Thermiques et l’ADEME. La conception des radiateurs nécessite des épaisseurs supérieures à la centaine de micromètres de matériaux thermoélectriques afin d’en optimiser l’espace disponible. L’électrodéposition est apparue comme la technologie la plus adaptée car elle permet de déposer les matériaux directement sur l’ailette. Cette étude est consacrée aux dépôts électrochimiques de chalcogénures de bismuth (Bi2Te3 et Bi0,5Sb1,5Te3), matériaux les plus performants aux températures de fonctionnement de l’échangeur thermique. La première partie de ces travaux concerne la faisabilité de l’obtention de films d’épaisseurs supérieures à 100 µm et leurs caractérisations : stœchiométrie, structures et propriétés thermoélectriques. L’utilisation originale d’une anode soluble permet l’obtention de films de Bi2Te3 de près de 400 µm. Pour le composé ternaire, la synthèse consiste en une succession de couches de composés différents (Bi0,25Sb0,75-Te0), avant de procéder à leur interdiffusion via un traitement thermique. La dernière partie concerne la réalisation d’un module thermoélectrique. Les multiples étapes de lithographie et de synthèses électrochimiques ont été étudiées afin d’obtenir un module adapté aux échangeurs thermiques. Les caractérisations préliminaires de leurs propriétés montrent des résistances élevées et plusieurs voies d’améliorations sont proposées / In order to face the rarefaction of fossil fuels, the automotive industry has to find new ways to reduce their vehicle consumption. One of the possible ideas is to recover the energy that is lost as heating by using thermoelectricity. The aim of this work is to set-up thermoelectric generators into the radiator in order to recover this lost heat in a frame of research project financially supported by Valéo Systèmes Thermiques and ADEME. The radiator design requires thermoelectric materials thicknesses up to hundred micrometers in order to optimize the available space. Electroplating seems to be the best way to synthesize those materials directly onto the radiator fins. This study focuses on the electroplating of the best thermoelectric materials adapted to the operating temperatures of the heat exchanger: bismuth chalcogenides (Bi2Te3 and Bi0,5Sb1,5Te3). Firstly, a study has been carried out in order to synthesize thick layers above 100 µm of those two materials. Stoichiometry and thermoelectric properties were also determined. The original use of a soluble anode permitted to obtain 400 µm thick Bi2Te3 films. For the ternary compound, the synthesis consisting in a succession of thin layers of Bi0,25Sb0,75 and Te0, before their interdiffusion by annealing, is also presented. Finally, the last part covers the study carried out on the realization of the thermoelectric generators. The multiple stages of lithography and electrochemical syntheses were studied in order to obtain a module adapted to the heat exchanger. The first characterizations evidence high internal resistances and different ways to improve them are also presented

Aerospace structural components made from polymer matrix composites (PMCs) offer numerous advantages. Their high stiffness and high strength combined with low densities enable lower fuel consumption coupled with higher payloads. As a result, PMCs provide an important economic advantage over typical metallic airframes. Textile reinforcements for PMCs are made by assembling reinforcement fibres, typically carbon. Then, the textile reinforcements are typically cut into smaller pieces, stacked, draped and assembled into a dry assembly called a preform, the shape of which generally approaches that of the PMC part to be made. This manufacturing process is labour intensive and expensive. Novel thick, net-shape, drapable, high vf textile reinforcements used toward manufacturing aerospace PMCs are being developed at the University of Ottawa. The technology enables the manufacturing of flat, drapable multilayered near net-shape preforms. The bending and in-plane shear behaviours of such novel thick reinforcement textiles was investigated to understand and define the behaviour of such thick fabric reinforcements when formed into required shapes. A bending apparatus was developed for investigating the bending behaviour of these novel thick reinforcement fabrics and an articulated frame shear rig was used for investigating the in-plane shear behaviour. A non-destructive inspection method using infrared imaging was used for investigating and identifying flaws and defects in these thick, dry textile reinforcements, aiming at increasing the quality and reproducibility of the final PMC parts made from these reinforcements.

This thesis deals with fabrication and optimization of lead-free piezoceramics based on (Ba0,85Ca0,15Zr0,1Ti0,9)O3 (BCZT). The BCZT precursor powder was synthesized by sol-gel method. Dependence of relative density, microstructure, phase structure and piezoelectric properties on the sintering temperature in a range from 1300–1500 °C was studied on disc shaped samples, which were prepared by cold isostatic pressing (CIP) using pressure of 700 MPa. It was found, that sintering at 1300 and 1350 °C leads to ceramics with fine-grain microstructure, which exhibits poor piezoelectric properties (d*33 = 50 pC·N1 and 65 pC·N1, respectively). The highest value of piezoelectric charge coefficient was obtained by sintering at 1500 °C (d*33 = 390 pC·N1). Furthermore, BCZT thick films were prepared by tape casting. The composition of the ceramic slurry was optimized and various sintering techniques were tested to obtain completely flat films of BCZT ceramics. The correct sintering configuration has not been found. The least deformation of the films was achieved when the samples were sintered hung on the ZrO2 rod. The highest value of d*33 for BCZT films was measured when the sample was sintered at 1400 °C with the dwell time for 4 h (d*33 = 340 pC·N1).

This thesis deals with issues of used hot plates and thick-film technology. The theoretical part of diploma thesis contains a theoretical analysis and description of corresponding technology and usage of materials. The practical part of the thesis focuses on the design of the resulting device, which forms design of the test and optimized hot element, the initial design of the device and the design of models for temperature simulations. Then follows description of the practical realization of the motifs and testing of the created thick-film structure on a ceramic substrate. In the last part are shown simulations of heat transfer in the proposed model of the device.

This work deals with thick-film sensor’s electrodes optimization. The main goal of this work is to find suitable design of the electrodes for the best and reproducible current response of thick-film sensors.

Master’s thesis deals with thick/film sensor’s electrodes optimization. The aim of this work is to determine how the geometric size and shape of the electrodes affect the output current response. Technology and electro-analytical method is described in the theoretical part. The practical part is aimed at thick-films electrodes and sensors optimalization. It is here each optimization TLV electrodes in terms of their impact on the size of the output current response three-electrode electrochemical system using standard electrodes. Similarly, there is a study of the effect size performed on one common electrode free-electrodes sensor. Finally, there are studied various forms of electrode area three-electrode thick-film sensor in terms of their effect on the output current response. Summarized results are described in the final part of the work.

Diploma thesis solves how to create system for measurement of little liquid flows. The basic types of liquid flowmeter, which are possible used for measurement of little liquid flows, are described in the introduction part of thesis. The limit for little flow is often determined as flow 100 mg.min-1 and low. Second part of this thesis describes the ways of capillary production and practical experiments with them. Thesis is focused to thick film technology and LTCC technology. Next part of this work is solution of simple measuring unit for measurement of little flows less than 100 mg.min 1, which is controlled by microprocessor ATmega16. The measuring unit can be worked separately or can be connected to PC. The next possibility of flowmeter optimisation is summarized in end of thesis.

Miniature electrochemical sensors can be produced by thick-film technology. The optimal properties of thick-film electrode system, the production technology optimization of thick-film sensors and the adjustment of optimal technological properties are main problems of sensor design. An area of working electrode and an electrode topology design is the important parts in design of electrode system optimization. The rules for optimization of electrode systems in classical electrochemistry exist. The design of standard thick-film electrode construction is limited (2-D construction, substrate dimensions, resolution, paste parameters …). Therefore rules for classical electrode systems cannot be used fully in this case and larger electrode area can be making by 3D structure only. One of resolutions is unconventional method. The increase of working electrode surface by unconventional method – ball and wire bonding is discussed in this work.