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Sinterabilidade, desenvolvimento microestrutural e caracterização elétrica do BaCe0,9Y0,1O3-ẟ nanométrico obtido por mistura de óxidos
(Universidade Federal de São Carlos, 2018-11-28) Ramos, Kethlinn; Souza, Dulcina Maria Pinatti Ferreira de; https://lattes.cnpq.br/4100119317525940; https://lattes.cnpq.br/5856791042277661
In this thesis, we investigated the microstructural development of BaCe0,9Y0,1O3-ẟ starting from aggregate-free submicrometric and nanometric powders. The differential of these powders is that synthesis occurred via solid-state reaction, compared to powders commonly used in the literature in the same size range. Nanometric particles were obtained by alternating steps of calcination with steps of grinding using isopropyl alcohol as dispersion media in a vibratory mill, and varying grinding time and load (weight ratio of grinding media/powder), with care to particle deflocculation, as well as keeping the grinding jars filled at only 50% of total capacity. The sinterability of compacts was surprisingly high, compared to literature reports, so that sintered samples with density higher than 95% of theoretical density were obtained at only 1200°C with dwell time of 10 hours. Literature shows that this degree of sintering is only achieved with the use of sintering aids. Systematic monitoring of microstructural development of the green compacts made with the different powders obtained in this thesis allowed the detection of a liquid phase appearing around 1200°C, which has not yet been reported in the literature. In green compacts with aggregates, the liquid phase was consumed in the densification of these defects so that macroporosity would remain even after sintering at 1600°C. In aggregate-free green compacts, the liquid phase aided to achieve high and homogeneous densification, mostly around the initial temperature of its formation. However, even after achieving high densification at low temperatures, higher ones are required in order to develop the microstructure in ways to reach adequate protonic electrical conductivity. The microstructure developed by powders obtained by grinding with 20:1 ratio (grinding media/powder) for 24h and sintered at 1600°C showed a proton conductivity of 2x10-2S/cm at 600°C which is in agreement with the best results in the literature.
O Brasil visto de cima: o campo de uma periferia a partir de centros de produção etnigráfica
(Universidade Federal de São Carlos, 2018-11-28) Chaves, Estêvão Barros; Leirner, Piero de Camargo; https://lattes.cnpq.br/3883880276055777; https://lattes.cnpq.br/5906937731368898
This thesis intends to observe the relationship between brazilian and foreign anthropologies, seeking the representation among it in the many senses that they may acquire. From the double “center-periphery” relations - between anthropologists and natives on one side, and central and marginal anthropologies on another- the research will seek to highlight the ways in which relations are established and their contents. In this sense, it will be necessary to see, among other elements, how certain "central" anthropologies dialogue with the Brazilian anthropology when its objects are in Brazil, At another level, we will look for definitions on the Brazilian anthropology in instruments such as encyclopedias, dictionaries and, mainly, periodicals. At this point, we intend to compare "outsiders" and "internal" views, produced, however, for a global audience, as a mechanism for observing the type of relationships that can be understood within vectors conceived by the "center-periphery" axis. How then could we observe the multiple positions that Brazilian anthropology occupies in the international field? The idea, therefore, is to build a typology of relationships that helps to think certain international politics about Brazilian anthropology.
Estudo das remoções dos servidores técnico-administrativos em uma instituição pública de ensino superior
(Universidade Federal de São Carlos, 2018-11-28) Priori, Marilda Cristina; Lizarelli, Fabiane Letícia; https://lattes.cnpq.br/4525431419326559; Molina, Wagner de Souza Leite; https://lattes.cnpq.br/5939243693407420; https://lattes.cnpq.br/8964683050346943
Allocating or reallocating civil servants at a public institution of higher education is not an easy task. The working areas are various and balancing the institutional and personal needs is a major challenge for People Management organs. This research aims at studying internal reorganizations from 2012 to 2016, by public administrative technicians of the Federal University of São Carlos (UFSCar). The present study is characterized as a case study, with an exploratory and descriptive approach with quantitative emphasis, besides bibliographical and documental research and questionnaires as a technical procedure. A documental research of service reports published at the institution website and internal spreadsheets used by Pró-Reitoria de Gestão de Pessoas (ProGPe) for the reorganizations was carried out. The study has concluded that the major movement happened in 2015, with 75 reorganizations. Considering the workers’ profiles, it was identified that most of them are female and they are aged from 28 to 37 years old. They have been at the institution for less than three years of effective practice and have higher degrees than required for the position. In order to identify the most recurring reasons for the reorganization processes, a questionnaire was used with closed questions to 107 servants. It was possible to conclude that work overload and responsibilities’ excess are the major reasons for the reorganization requests, followed by relationship problems with manager/boss and dissatisfaction with the team and colleagues. Considering these results, this study aims at assisting a future People Management policy which could be more appropriate.