نتایج جستجو برای: threshold shift

تعداد نتایج: 255776  

2011
Seyedbagher Mortazavi Masoud Motalebi Kashani Ali Khavanin Abdolamir Alameh Ramezan Mirzaee

Problem statement: Noise Induced Hearing Loss (NIHL) is one of the most important occupational disease in worldwide. NIHL has been found to be potentiated by simultaneous Carbon monoxide (CO) exposure. Exposure to noise plus CO is common in occupational and environmental settings. Free radicals have been implicated in cochlear damage resulting from exposure to noise and due to CO hypoxia This s...

2011
Masoud Motallebi Kashani Seyyed Bagher Mortazavi Ali Khavanin Abdolamir Allameh Ramezan Mirzaee Mehdi Akbari

Noise induced hearin gloss (NIHL) is one of the most important occupational disease world wide. NIHL has been found potentiate by simultaneous carbon monoxide (CO) exposure. Free radicals have been implicated in cochlear damage resulted from the exposure to noise and due to the CO hypoxia. This study examined whether α-tocopherol administration , as a free radical scavenger, causes the attenuat...

2015
Meftah N. Sengouga M. Henini

Thin Film Transistors based on amorphous Indium-Gallium-Zinc-Oxide (a-IGZO TFT) are receiving a great deal of attention for their numerous applications as alternatives for amorphous and poly-crystalline Silicon based TFTs. A major concern about a-IGZO TFTs is that they suffer from instabilities when subjected to different types of stress (bias, light, etc...). Stress is believed to create defec...

Journal: :EURASIP J. Image and Video Processing 2017
Kavitha Nagarathinam Ruba Soundar Kathavarayan

Many surveillance and forensic applications face problems in identifying shadows and their removal. The moving shadow points overlap with the moving objects in a video sequence leading to misclassification of the exact object. This article presents a novel method for identifying and removing moving shadows using stationary wavelet transform (SWT) based on a threshold determined by wavelet coeff...

Journal: :Industrial health 2006
Ibrahim Tamin Nor Saleha Ismail Noor Hassim

Noise is one of the hazards faced by workers. A cross-sectional study was conducted among industries in Negeri Sembilan with the objective to assess their compliance to Hearing Conservation Programme (HCP). The other objectives of this study were to determine the factors influencing it and to show the industries' compliance to each element of the programme. It was also to identify the associati...

2015
John Kennedy

Noise is an unavoidable component of motorcycling. The noise sources are varied, and include the helmet itself which also filters the noise passing through it. Here helmet noise transmission characteristics have been analyzed using insertion loss measurements and loudness matching in a behavioural study. Results demonstrate the action of the helmet as a spectral filter and confirm previously pu...

Journal: :The Journal of physiology 1977
H B Barlow A M Derrington L R Harris P Lennie

1. Action potentials were recorded from optic nerve fibres of lightly anaesthetized cats while parts of the retina remote from the receptive field were stimulated by a shifting grating. 2. Vigorous responses can be obtained under these conditions, confirming McIlwain (1966), Krüger & Fischer (1973), and others. 3. These 'shift responses' are not caused by fluctuations of stray light because (a)...

Journal: :Microelectronics Reliability 2014
Ivan Starkov Alexander S. Starkov

In this paper, we have investigated the turn-around effect of the threshold voltage (Vth) shift in the case of an n-type long channel MOSFET during hot-carrier stress. This effect is explained by the interplay between interface states and oxide traps, i.e. by the partial compensation of the rapidly created oxide charges by the more slowly created interface states. Significant hole trapping is o...

Shojaeefard, Talebitooti, Torabi, YarmohammadiSatri,

In this paper, a method based on binary-coded genetic algorithm is proposed to explore an optimization method, for obtaining an optimal elliptical tank. This optimization method enhances the rollover threshold of a tank vehicle, especially under partial filling conditions. Minimizing the overturning moment imposed on the vehicle due to c.g. height of the liquid load, lateral acceleration and ca...

ژورنال: سلامت کار ایران 2011
خانجانی, نرگس, جعفری ندوشن, رضا, حلوانی, غلامحسین, سلمانی ندوشن, مجاهده, قطبی, محمدرضا, منظم , محمدرضا,

  Background and aims  During last decades one of the hazardous agents on workers health has been workplaces noise. The aim of this study was to investigate the level of noise exposure in different jobs and noise induced permanent threshold shift in relation to noise level and work experience.   Methods  This is a cross-sectional and descriptive study that performed among total workers. Dosimet...

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