Buscar
Mostrando ítems 1-10 de 672
A new South American network to study the atmospheric electric field and its variations related to geophysical phenomena
(Elsevier, 2014-12)
In this paper we present the capability of a new network of field mill sensors to monitor the atmospheric electric field at various locations in South America; we also show some early results. The main objective of the new ...
Electric field and electric potential due to a finite cylindrical surface charge distribution considering a linearly variable surface charge density
(IOS Press, 2016-08)
This paper proposes a fast and accurate method for determining the electric potential and the radial and axial components of electric field intensity produced by a finite cylindrical surface charge distribution. The surface ...
Control automatico de un sistema electrico mediante logica difusa
(1999-12-01)
Substitution of fuzzy logic control in an electrical system normally controlled by proportional-integral frequency was studied and analyzed. A linear model of an electrical system, the concepts which govern the theory of ...
Relationship between biogas production and variations in electric resistivity in landfill of rio Claro city, Brazil
(2015-01-01)
This work relates measures of the biogas flow in drains located on landfill with measurements of electric resistivity, obtained by the technique of geophysical logging by measuring cable installed in two vertical boreholes ...
Analysis of the Electrical Characteristics of an Alternative Solution for the Brazilian-Amazon Transmission System
(Taylor & Francis Inc, 2011-01-01)
This article analyzes the electrical parameters of a 3-phase transmission line using a 280-m-high steel tower that has been proposed for the Amazon transmission system in Brazil. The height of the line conductors and the ...
Electrical and micro structural properties of (Zn, Nb, Fe)-doped SnO2 varistor systems
(Elsevier B.V., 2005-01-01)
The electrical and microstructural properties of SnO2-based varistors with the addition of 0.025 and 0.050 mol% of Fe2O3 have been characterised. Electric field (E) versus current density (J) curves showed that the effect ...
Volatile organic compounds detection by electrical sensors using polyalkylthiophene-based Langmuir-Blodgett films
(Springer, 2019-03-01)
Despite their environmental and health hazards, volatile organic compounds (VOCs) are present in our everyday life (e.g., fuels and solvents). Their detection is of paramount importance for environmental and occupational ...
Intravaginal electrical stimlation for the treatment of chronic pelvic pain
(Sci Printers & Publ IncSt LouisEUA, 2005)
Assessment of the temporal variation of electrical potential and pH of different bleaching agents
(2021-11-01)
Introduction: Tooth whitening procedures are under continuous investigation to improve esthetic outcomes and reduce bleaching sensitivity (BS) precipitating from treatments. During the dental bleaching process it is known ...
The role of oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
(Springer, 2005-03-01)
Variations on the microstructure development and on the electrical properties of SnO2-based varistors are discussed on the basis of the oxygen vacancies created or annihilated by the presence of different additives. Electron ...