Investigação das propriedades ópticas, elétricas e estruturais em ametista

Pós-graduação em Ciência e Tecnologia de Materiais - FC

Desenvolvimento de redes neurais para previsão de cargas elétricas de sistemas de energia elétrica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Estudo da segregação de dopantes no contorno de grão e sua influência nas propriedades elétricas de cerâmicas à base de 'SN''O IND.2'

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo estrutural dos precursores, intermediários e colóides derivados do acetato de zinco e propriedades elétricas, óticas e estruturais dos filmes de óxido de zinco dopados com índio

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Aplicação via fertirrigação de soluções com diferentes condutividades elétricas para produção de gérbera (Gerbera jamesonii L.) sob ambiente protegido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Propriedades elétricas e modelagem da barreira de potencial do sistema varistor à base de SnO2-TiO2

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estrutura eletrônica e propriedades elétricas fotoinduzidas em filmes finos de SnO2 com dopagem de Sb, e formação de heteroestruturas com TiO2

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Previsão de demanda de cargas elétricas por seleção de variáveis stepwise e redes neurais artificiais

Pós-graduação em Engenharia Elétrica - FEIS

Estudo das propriedades elétricas do cobre e alumínio; sobre a força magnética em um imã caindo dentro de um tubo

Magnetic fields can be produced by natural magnets, artificial magnets, and by circulating electric currents in wires and solenoids. An interesting experiment to observe the interaction between the magnetic field and free charges in a conductor, a magnet falling inside a tube made of conductive materials. The slowing down of the magnet by the appearance of a field in the opposite direction to the original one (Lenz's Law) is function the number of free electrons in the conductor and the electrical properties of this. Based on this, the objective of this study is to analyze the relationship between the electrical properties of conductors, copper and aluminum, with magnetic force on a neodymium magnet-iron-boron magnet falling inside a copper tube and aluminum, positioned vertically. In performing this experiment, we observed that it is a demonstration of Lenz-Faraday’s Law

Análise das resistências de embutimento e de compressão para madeiras de pinus e eucalipto

The connections in the wood structures are the places with high concentrations of stresses and therefore are more fragile than the rest of the structure. The connections between pieces of wood can be made by metal pins (nails or screws). The compression and embedment strength has significant influence on the calculation of the connections. The main aim of this work was to evaluate the compression and embedment strength in the directions parallel, inclined at 45° and normal to the grain, using standard specimens according to ABNT NBR 7190/1997 standard. The compression and embedment strength were initially evaluated according to ABNT NBR 7190/1997, which admits the deformation of 2‰ as limit of embedment and the ratio between the ultimate strength and the area of application of load in the specimen for the compressive strength. Afterward, the embedment strength was evaluated by the EUROCEDE 5 /1995 European standard, which use the limit of 5 mm of the displacement for the embedment. Specimens of Pinus oocarpa, Cumaru and Pinus taeda were used in tests to calibration of equipment and specimens of Pinus taeda and Eucalipto citriodora were used to compare the results of strength. The results of strength were evaluated based on statistical analysis. The results of compressive strength for the Pinus taeda showed no significant differences in embedment strength in the directions parallel and normal to the grain. For the Eucalipto citriodora only in the direction parallel to grain the compression strength was not significant compared with the embedment strength. For both species, only the parallel compression strength and inclined at 45o to the grain, which were to the grain, which were admitted the strain of 2‰ were not significantly different compared with the compression strength determined according to ABNT NBR 7190/1997. The normal compression strength obtained according to ABNT NBR 7190/1997 and ultimate compression strength not ...

Algumas considerações geográficas sobre as descargas elétricas atmosféricas no Estado de São Paulo

The atmospheric events denominated electric discharges are complexes and represent social, economic and environmental damages. For this research, it was made the bibliographical survey about this matter, mapping, phenomenon and victims analysis that occurred at The State of São Paulo, between 2005/2006

Planejamento e organização das atividades de manutenção em instalações elétricas prediais e seus componentes

Are presented on this paper, concepts of corrective, preventive and predictive maintenances, following the prerequisites for planning and implementation of a maintenance plan. You also find the theoretical introduction of some measurement instruments accompanied by the necessary and recommended activities during routine maintenances of the electrical equipments in a building installation. Using case study, it is possible to assess a real maintenance plan applied to two occupied floors in a financial institution. The developing of a case study consolidates the effectiveness of the present concepts on this theoretical introduction and shows that the current maintenance plan can be improved in order to obtain better results on company productivity and reliability of equipments. As a conclusion, we can notice the importance of a solid maintenance plan and the need of including this theme on the graduation in Electrical Engineering

Resistências e transformações da organização agrária e histórico-cultural do bairro do Sobrado, Rio Claro/SP

O município de Rio Claro, localizado na região central do estado de São Paulo, durante o auge da era do café, da imigração tanto estrangeira como regional e da instalação de várias empresas, dentre elas a Companhia Paulista de Estradas de Ferro se urbanizou num acelerado ritmo, assim como tantas outras cidades do Brasil. Como resultado o aglomerado urbano cresceu, necessitando que seu perímetro expandisse para a zona rural, comprometendo tanto o seu patrimônio histórico quanto o cultural. Antigas propriedades datadas do final do século XIX que resistem à ação do tempo e mantém viva a riqueza e a cultura da época dão lugar à cidade. Esse processo é observado no bairro rural do Sobrado, localizado na região norte de Rio Claro, que vem sofrendo diretamente com a expansão urbana através da criação de novos loteamentos residenciais e comerciais. Portanto, o avanço da urbanização tem provocado à degradação e/ou desaparecimento dos fatos históricos e culturais ainda presentes nos bairros rurais do município

Visualização científica de descargas elétricas atmosféricas

This paper aims to develop a web application for viewing Atmospheric Electrical Discharge, plotting marks on a map, using as base data provided by SIMEPAR. The developed system uses techniques and tools which enable the creation of Web system without requiring the use of plugins or external software, running on virtually all web browsers and platforms. This tool aims to aid meteorologists monitor agile discharges and help society at large to prevent accidents caused by this phenomenon of nature

Estudo de impacto de ações de eficiência energética em instalações elétricas residenciais

This paper addresses methods of reducing the electric energy consumption on residences by the means of constructive measures and replacement of electric devices. Analyzing their impacts on residential and national level based on data issued by IBGE (Brazilian Institute of Geography and Statistics) and PROCEL (National Program for Electricity Conservation).