Results 251 to 260 of about 1,551,396 (296)

Lightning return stroke models

Journal of Geophysical Research: Oceans, 1980
We test the two most commonly used lightning return stroke models, Bruce‐Golde and transmission line, against subsequent stroke electric and magnetic field wave forms measured simultaneously at near and distant stations and show that these models are inadequate to describe the experimental data.
Y. T. Lin, M. A. Uman, R. B. Standler
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A Novel Procedure to Represent Lightning Return Strokes—Current Dissipation Return Stroke Models

IEEE Transactions on Electromagnetic Compatibility, 2009
Engineering return stroke models available in the literature can be divided into two categories, namely, current propagation models and current generation models. Based on the theory of pulse propagation along transmission lines in the presence of corona, a third procedure to describe return strokes, which, in fact, is the inverse of current generation
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Impact of Stroke on Return to Work

Brain Impairment, 2008
AbstractStroke has a marked impact on the ability to return to work. However, the stroke and its residual cognitive, physical and language deficits do not fully explain return-to-work success. While those with very severe deficits are less likely to return to work, and presence of disability is important, other extrinsic and intrinsic factors, such as ...
Kathryn A. Radford, Marion F. Walker
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Radius of the lightning return stroke

International Journal of Electronics, 1977
This paper attempts to investigate the variation of the radius of the main phase of the return stroke with time. From the knowledge of the conductivity of the stepped leader in the immediate neighbourhood of the positively charged return stroke tip, the radius of the upgoing return stroke has been computed and it is found to increase with time until it
R. P. MISRA, JAGDISH RAI
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A model for subsequent return strokes

Journal of Electrostatics, 1993
Abstract In this paper a new return stroke model is introduced which is capable of predicting the temporal and spatial variation of the return stroke current and retunrn stroke velocity. The model predictions concerning the electromagnetic fields, return stroke current and return stroke velocity are in good agreement with experimental observations ...
openaire   +1 more source

Dynamics of the Lightning Discharge During the Return Stroke

2007 IEEE 34th International Conference on Plasma Science (ICOPS), 2007
Summary form only given. Numerous return stroke models have been developed with the aim of enabling a numerical calculation of the radiated lightning electromagnetic pulse (LEMP) and to describe the physics of the gaseous-discharge processes in the lightning channel. Generally taken, all models can be roughly divided into four groups.
J.M. Cvetic, P.V. Osmokrovic
openaire   +1 more source

An improved procedure for the return stroke current identification

IEEE Transactions on Magnetics, 2005
We propose an improved procedure to identify the lightning return stroke current characteristics. This procedure follows the inverse approaches, presenting a new expansion basis able to widen the class of function which can be reconstructed.
ANDREOTTI, AMEDEO, D. ASSANTE, S. FALCO, VEROLINO, LUIGI   +3 more
openaire   +2 more sources

Natural Frequencies of a Post with a Lightning Return Stroke

Electromagnetics, 1987
ABSTRACT The natural frequencies are calculated for a metallic post with a lightning channel attached. Two different lightning channel models are discussed and the asymptotic antenna technique is employed to solve the problem formulated in terms of an integro-differential equation.
F. C. Yang, K. S. H. Lee
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Factors affecting return to driving post-stroke

Irish Journal of Medical Science, 2010
Stroke can affect a person's ability to drive, an important means of transportation in the developed world.To determine percentage of patients and factors associated with return to driving post-stroke in a service with emphasis on driver assessment.Retrospective study of patients discharged from the Stroke Service of our 470-bed teaching hospital from ...
K M, Tan, A, O'Driscoll, D, O'Neill
openaire   +2 more sources

Return stroke speed models

2014
The return stroke speed is one of the main parameters in the modelling of return strokes. The available experimental observations show that the return stroke speed decreases with height, both in the first and the subsequent return strokes. The experimental data also seem to indicate that there is no relationship between the return stroke current and ...
openaire   +1 more source