Navegando por Assunto "Atmospheric electricity"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Elementos de sensores de eletricidade atmosférica
(Universidade Federal do Pará, 2010-05-18) PEREIRA, Carlos Simões; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
The electromagnetic environment surrounding the planet Earth has a fundamental role in the preservation and development of the living creature, and perhaps the last frontier of human knowledge to be dominated completely, before we ventured to the space outside in search of new opportunity outside. This environment is only now being tamed and best known, and this endeavor has as lynch pin the use of appropriate sensors that can detect and quantify these electrical effects, to serve as a basis for the generation of theories, to explain the underlying phenomena, including in this, the sensors of atmospheric electricity. This work intends to make a comprehensive analysis of these sensor’s systems of atmospheric electricity in use today, evaluating their models of operation, its limitations and its intelligence, and producing a summarized basic specifications for development of better sensors and setting standards for metric types of the variables to be measured, to cope with the currents and future demands in this field of knowledge. Additionally, the processes involved in the calibration of these sensors will be addressed with a review of computational model based on the method of moments (MoM) and other that my be used for evaluation of electromagnetic fields emitted by remote charges patterns and electrical currents, which serve to support and basis for these calibrations.
Acesso aberto (Open Access)
Planejamento de sistemas de proteção contra descargas atmosféricas para unidades habitacionais de baixa renda
(Universidade Federal do Pará, 2014-02-24) SANTOS, Diego Guimarães dos; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
This research have the purpose to realize a study about the lightning occurrence profile over the municipalities of Belém, Ananindeua and Marituba, in the period of 1991 to 2011 with the objective to establish the lightning occurrence profile in these municipalities, as well as identify what kind of factors need to be observed and/or identified with the finality to realize an appropriate planning of protection systems against lightning in low income housing builded by the acceleration program of development from the federal government, more precisely in Taboquinha housing, located on the district of Cruzeiro in Icoaraci. After the realization of the comparative analysis with lightning occurrence data proceeding from the lightning detection network STARNET, lightning occurrence data from LIS sensor installed on board of the TRMM satellite, as well as lightning data acquired by the Brazilian Association of Technical Standards NBR 5419, it was possible to conclude that the Taboquinha housing need an appropriate protection system against lightning due to sinister occurrence records involving direct incidence of atmospheric discharges, as well as your secondary effects. In the end of this research will be presented some discussion topics related with some conclusions about the lightning occurrence profile in the present region presented by the NBR 5419 standard, because this incoherent conclusion may harm the public patrimony, as well as the common citizen and their construction.