Search Results - "Murta Vale, Maria Helena"

Unusual features of negative leaders' development in natural lightning, according to simultaneous records of current, electric field, luminosity, and high‐speed video by Guimaraes, Miguel, Arcanjo, Marcelo, Murta Vale, Maria Helena, Visacro, Silverio

“…The development of downward and upward leaders that formed two negative cloud‐to‐ground return strokes in natural lightning, spaced only about 200 µs apart and…”
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Features of Upward Positive Leaders Initiated From Towers in Natural Cloud‐to‐Ground Lightning Based on Simultaneous High‐Speed Videos, Measured Currents, and Electric Fields by Visacro, Silverio, Guimaraes, Miguel, Murta Vale, Maria Helena

“…Original simultaneous records of currents, close electric field, and high‐speed videos of natural negative cloud‐to‐ground lightning striking the tower of…”
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Methodology for evaluation of grid-tie connection of distributed energy resources - Case study with photovoltaic and energy storage by Moraes Toledo, Olga, Oliveira Filho, Delly, Diniz, Antonia Sonia A. C., Helvecio Martins, Jose, Murta Vale, Maria Helena

“…The availability of reliable energy sources for all people, especially electricity, indicates an imbalance in the living conditions of a society. Therefore,…”
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M-component currents of first return strokes in natural negative cloud-to-ground lightning by Visacro, Silverio, Araujo, Listz, Guimarães, Miguel, Vale, Maria Helena Murta

“…Records of M‐component currents of first return strokes in natural negative cloud‐to‐ground lightning measured in a short instrumented tower are shown along…”
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Development of expressions for using a short cylindrical tube in on-site measurements of frequency-dependent electric parameters of soil by Silva, Bárbara Pereira, Visacro, Silverio, Vale, Maria Helena Murta

“…•Original methodology for determining the frequency dependence of electric parameters.•Frequency dependent soil resistivity and permittivity.•Investigating the…”
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The Response of Grounding Electrodes to Lightning Currents: The Effect of Frequency-Dependent Soil Resistivity and Permittivity by Visacro, Silverio, Alipio, R, Murta Vale, Maria Helena, Pereira, C

“…A methodology is proposed and applied to determine the variation of soil resistivity and permittivity in the typical range of lightning current frequency…”
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Features of Upward Lightning Measured in a Tropical Region and Their Potential to Cause Hazardous Effects by Visacro, Silverio, Guimaraes, Miguel, Mattioli, Pedro, Murta Vale, Maria Helena

“…Features of upward lightning and their potential to yield hazardous effects are discussed based on original fast video and simultaneous records of current and…”
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Striking Distance Determined From High‐Speed Videos and Measured Currents in Negative Cloud‐to‐Ground Lightning by Visacro, Silverio, Guimaraes, Miguel, Murta Vale, Maria Helena

“…First and subsequent return strokes' striking distances (SDs) were determined for negative cloud‐to‐ground flashes from high‐speed videos exhibiting the…”
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Early phase of lightning currents measured in a short tower associated with direct and nearby lightning strikes by Visacro, Silverio, Murta Vale, Maria Helena, Correa, Guilherme, Teixeira, Andre

“…Records of natural lightning currents of negative downward strokes measured at the base of a 60 m high instrumented tower are presented to denote patterns of…”
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Early phases of lightning currents by Silverio, Visacro, Helena, Murta Vale Maria, Andre, Teixeira

“…The patterns of current waves of negative downward lightning strokes measured at the base of a short instrumented tower are discussed. The features of the…”
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Parallel processing applied to the design of concrete encased grounding electrodes by María Helena Murta Vale, Humberto de Aquino Silveira, Filho, Silvério Visacro, Liria Matsumoto Sato

“…This work presents the authors investigation regarding the application of parallel processing to the design of grounding systems, comprising concrete encased…”
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