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Spray pirólise de filmes de óxido de zinco dopado com alumínio e estanho
(Universidade Federal de São Carlos, 2019-07-02) Reis, Sabrina Lara dos; Godoy, Marcio Peron Franco de; https://lattes.cnpq.br/2609654784637427; https://lattes.cnpq.br/7010023674793524
We present a study on the structural, optical and electrical properties of ZnO doped with Al (ZnO: Al) and with Sn (ZnO: Sn) grown on glass substrates using the Spray Pyrolysis technique. The sample were grown in the temperature range of 220-300 ° C employing as precursors Zinc acetate and Aluminum and Tin chlorides. The nominal concentrations of dopants vary from 0.01 to 1.00% for samples containing Al and from 0.05 to 2.00% for samples containing Sn. The characterization in this study used techniques as X-ray Diffraction (XRD), Optical Transmittance and Absorbance, Photoluminescence (PL), I-V Curve and Electrical Capacitance. The XRD analysis indicates that our films are polycrystalline with a wurtzite structure and preferential direction along the plane (002) with no presence of secondary phases. The doping does not interfere in the optical transparency of our films in the region of the visible spectrum, with transmittance higher than 80%. Our samples´ set present the Burstein-Moss effect. We estimate an electron concentration around 1019 cm-3 for the sample doped with 0.5% of Al, which also presented a rectifier behavior when composing a Schottky contact with gold, presenting the value of 6.3 V for knee tension and estimate of density of ionized and compensated impurities of the order of 1017 cm-3. The PL data show ultraviolet emission bands corresponding to NBE and also in the visible region corresponding to defect levels. Increasing the concentration of Al and Sn, the bandgap value estimated according to the Varshni adjustment increases, approaching the theoretical value for the ZnO (3.37 eV). At 300 K, the absorbed photons have higher energies than the photons emitted in the PL for the two sets of samples, indicating a possible doping mechanism as the dopant concentration increases.
Eficiência e eficácia da filosofia "Visão Zero" na segurança de trânsito
(Universidade Federal de São Carlos, 2019-07-02) Prado, Ana Carolina Oliveira; Raia Junior, Archimedes Azevedo; https://lattes.cnpq.br/6413793013018019; https://lattes.cnpq.br/5452022567692508
Road accidents have increased and generated many material and human losses, especially in developing countries. Traffic accidents can occur in many ways and many factors are involved in these occurrences, from human failures, engineering and the environment itself. The consequences of these failures have killed more than 1.2 million people annually and the forecast is not optimistic, these figures are expected to reach almost 1.9 million by 2020, in addition to the many injured, and the most worrying is to be the main cause of death among young people aged 15 to 29 years. In order to find solutions to the problems of accidentality, many countries have taken measures that are reducing the occurrence of accidents, among them Sweden, which developed an important concept, Zero Vision (VZ), with the aim of reviewing its traffic accidents and how to treat them, this new perception of accidents has an important differential, considers a range of road safety officers, not only road users, but also assumes that the human being makes mistakes and that these errors should not be punished with death. The aim of the present research was to survey the results obtained by Sweden with the creation of the VZ philosophy, as well as the other countries that adopted this philosophy to reduce accidents. From the VZ state of the art, a survey was made with experts from the area of road safety and engineering, from which it was observed that it is possible to adopt VZ in Brazil, despite the difficulties that may arise due to cultural problems that affect the effective application of elements necessary for the application of this philosophy, such as Commitment, as well as the strategy for creating and enforcing security policies.
Políticas para a extensão universitária e sua implementação na UFG: 2006 a 2016
(Universidade Federal de São Carlos, 2019-07-02) Batista, Zenilde Nunes; Kerbauy, Maria Teresa Miceli; https://lattes.cnpq.br/4762029784021248; https://lattes.cnpq.br/1586647809753762
This research analyzes the public policies directed to the university extension at the Universidade Federal de Goiás – UFG, during the period from 2006 to 2016. The impulse for this investigation arose from the questioning about the government policies and about the practice of institutional actions directed to the actions of extension. Understanding it as one of the tools of the university that is capable of assisting in the process of social transformation, in a preliminary moment we elected theoretical input for understanding the matter, taking it as a component of a network, through which they move different actors, with a view to the construction and sharing of knowledge. Regarding the methodology, the thesis is predominantly in the scope of qualitative research, having as north studies of the STS (Science, Technology and Society) field, as well as those specific on University Extension – its history and its concepts. The quantitative aspect is summarized in the final section, in which we analyze the institutional policies; therefore, we developed this research under mixed methodology. For this, we resorted to bibliographic and documentary research, in addition to data collection. In this endeavor, the internal documents of the Extension and Culture Pro-Rectory were essential, as well as data from the GFU’s electronic extension system. The laws and norms consultation were another important action in the process. The main objective of this thesis was to investigate the impact caused by public extension policies at GFU. Moreover, the main question asks as a response whether there was growth in the extension afforded by those policies. Our initial hypothesis – that adherence to these policies and specific aspects of internal governance provided a high performance in the area of extension at GFU – confirms itself at the end of the research, along with the finding that government initiatives in that period were also reason for such institutional return size. Key-words: University Extension; Public Policies; Education; Social Actors; Governance.