نتایج جستجو برای: lightning

تعداد نتایج: 6387  

Journal: :AJNR. American journal of neuroradiology 2007
C Offiah M Heran D Graeb

Otologic injury associated with fatal and nonfatal lightning strikes has been sporadically reported in the literature. The most common acoustic insult is a conductive hearing loss secondary to rupture of the tympanic membrane. Although conjecture has been made of the theoretic possibility of ossicular injury from lightning strike, to our knowledge, none has been demonstrated intraoperatively or...

2014
R. B. Rodrigues V. M. F. Mendes J. P. S. Catalão

This paper is concerned with direct or indirect lightning strokes on wind turbines, studying overvoltages and electromagnetic transients. As wind power generation undergoes rapid growth, lightning damages involving wind turbines have come to be regarded with more attention. With the aim of providing further insights into the lightning protection of wind turbines, describing the transient behavi...

2016
Hun-Chul Seo Sun-Kyu Choi Byung-Sung Lee Chul-Hwan Kim

Because of the random characteristics of lightning, the Monte Carlo method is applied to estimate the flashover rate due to lightning, however, the simulations using previous methods are difficult to both beginner and expert in power corporations. Therefore, this paper proposes the new and easy method to simulate the flashover rate by connection of electromagnetic transients program (EMTP) and ...

2002
Yujin Wang Alan DeSilva

Title of Dissertation: EXPERIMENTAL STUDIES OF THE PRODUCTION OF NITROGEN OXIDES BY SIMULATED LIGHTNING SPARKS Yujin Wang Doctor of Philosophy, 1998 Dissertation directed by: Alan DeSilva Professor Institute for Physical Science and Technology Department of Physics Lightning flashes have been simulated with arcs at ambient conditions. Each simulated flash consisted of a weakly ionized leader ch...

1999
JOHN MOLINARI PAUL MOORE VINCENT IDONE

Cloud-to-ground lightning flash locations were examined for nine Atlantic basin hurricanes using data from the National Lightning Detection Network. A common radial distribution in ground flash density was evident: a weak maximum in the eyewall region, a clear minimum 80–100 km outside the eyewall, and a strong maximum in the vicinity of outer rainbands (210–290-km radius). These results are co...

Journal: :IEICE Transactions 2012
I Putu Agung Bayupati Yoshiya Kasahara Yoshitaka Goto

When the Akebono (EXOS-D) satellite passed through the plasmasphere, a series of lightning whistlers was observed by its analog wideband receiver (WBA). Recently, we developed an intelligent algorithm to detect lightning whistlers from WBA data. In this study, we analyzed two typical events representing the clear dispersion characteristics of lightning whistlers along the trajectory of Akebono....

2004
A. Borghetti G. Celli C. A. Nucci M. Paolone F. Pilo

Models for the calculation of lightning-induced voltages on distribution networks, should be able to take into account the presence of shielding wires and/or neutral conductors and of their relevant groundings. The paper deals with the estimation of the influence of these groundings with particular reference to the grounding electrode model on the calculated values of the lightninginduced volta...

Journal: :JPMA. The Journal of the Pakistan Medical Association 2013
Sevdegul Karadas Ertan Vuruskan Recep Dursun Isa Sincer Hayriye Gonullu Emre Akkaya

Cardiac events due to lightning strike and their severity vary according to the strength of the electric current and the duration of exposure. The electrophysiological effects of lightning on the heart can result in ventricular fibrillation, asystole, QT prolongation, supraventricular tachycardia, and non-specific ST-T wave changes. In this report, a case of a patient who suffered myocardial in...

Journal: :Journal of neurology, neurosurgery, and psychiatry 1992
C H Hawkes J W Thorpe

The case of a 19 year old man struck by lightning is described. He sustained quadriplegia for several months and fully recovered. It is suggested that his weakness was due to extensive peripheral nerve damage. In addition, he displayed many well recognised medical complications of lightning injury including acute renal failure, rhabdomyolysis, respiratory distress syndrome, autonomic dysfunctio...

2001
Vladimir A. Rakov

Experimental data showing the transient behavior of tall objects struck by lightning are reviewed. The influence of this transient behavior, illustrated by simple calculations, on measured lightning current and measured remote electromagnetic fields is discussed. The estimated equivalent impedance of the lightning channel at the time of the initial current peak is appreciably higher than the ch...

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