Eletric Fields
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Instantons in curved spaces / Instantons em espaços curvos
In this work we study instanton solutions of the Yang-Mills theory in Schwarzschild and Reissner-Nordstrom spaces with gauge group SU(2).Instantons are solutions to the classical field equations of Yang-Mills theory defined in a space with Riemannian (positive de finite)metric with finite action. We begin with a review of the geometric setting of Yang-Mills
Publicado em: 2010
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2. Investigação teórica da quimisssorção do ânion metanossulfonato em eletrodos de platina (111) e (100) via método semi-empírico
Several electrochemical processes, such as electrocatalysis of organic substrates, make use of mediators. One of the mediators is the most commonly used anion methanesulfonate, CH3SO3, which has several advantages for such use, and chemical stability considered one of them. However, experimental studies indicate the possibility of this compound suffer the ad
Publicado em: 2010
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3. Clustering analysis of the data of DFA profiles of eletric induction in oil wells / Análise de agrupamentos dos dados de DFA oriundos de perfis elétricos de indução de poços de petróleo
The main objective of this study is to apply recently developed methods of physical-statistic to time series analysis, particularly in electrical inductions profiles of oil wells data, to study the petrophysical similarity of those wells in a spatial distribution. For this, we used the DFA method in order to know if we can or not use this technique to charac
Publicado em: 2009
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4. Avaliação do Programa de Erradicação do Trabalho Infantil em Mossoró-RN. / Evaluation of Eradication of Child Labor in Mossoró.
This research aims to evaluate the Elimination of Child Labor Program PETI in Mossoró-RN related to life style changes in families that have kids and teenagers trated by the program. Documentary and fields researches were made, the last one happened between march and August 2009. A questionary was given to the people responsible to the children and teenager
Publicado em: 2008
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5. Construção de um instrumento para a medida e estudo do campo elétrico da atmosfera / Fabrication of an instrument for measuring and the study of the atmospheric electric field.
An equipment was constructed for utilizing with the aim at performing the measurement of vertical atmospheric electric field next to the earth surface in Pelotas town, in fair-weather conditions (sky free of clouds) and it uses as a sensor a field mill of the rotating dipole type in stainless steel with 30 centimeter length. This aerial is set in motion by a
Publicado em: 2006
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6. Potencials and electric fields inside and outside resistive conductors carrying steady currents / Potenciais e campos eletricos dentro e fora de condutores resistivos com correntes constantes
In Chapter 1 we present an introduction about the electric field inside and outside resistive conductors carrying steady currents. We also discuss the distribution of surface charges that maintains the current fiow and its relation with these electric fields. We present some experiments related with these electric fields outside conductors with steady curren
Publicado em: 2005
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7. Estudo das características de relâmpagos nuvem-solo negativos através da análise comparativa de observações por múltiplas técnicas. / Study of negative cloud-to-ground lightning features from comparative analysis of observations by multiple techniques.
For the first time in Brazil, an electric field antenna for lightning radiation, with 1.25 µs resolution was developed. From thunderstorms over Sao José dos Campos, between February and March of 2003, information of lightning synchronized to GPS time, were simultaneously obtained by this antenna, by a 1ms resolution high-speed camera and by the Brazilian L
Publicado em: 2004
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8. Estudo das características de relâmpagos nuvem-solo negativos através da análise comparativa de observações por múltiplas técnicas. / Study of negative cloud-to-ground lightning features from comparative analysis of observations by multiple techniques.
For the first time in Brazil, an electric field antenna for lightning radiation, with 1.25 µs resolution was developed. From thunderstorms over Sao José dos Campos, between February and March of 2003, information of lightning synchronized to GPS time, were simultaneously obtained by this antenna, by a 1ms resolution high-speed camera and by the Brazilian L
Publicado em: 2004