نتایج جستجو برای: noise stress

تعداد نتایج: 630573  

2017
Anne T. M. Konkle Stephen E. Keith James P. McNamee David Michaud

INTRODUCTION Epidemiological studies have suggested an association between the relative risk for developing cardiovascular disease (CVD) and long-term exposure to elevated levels of transportation noise. The contention is that this association is largely owing to an increase in stress-related biomarkers that are thought to be associated with CVD. Animal models have demonstrated that acute noise...

2015
SRIKUMAR VIJAY KUMAR

Stress is a daily phenomenon faced by every living being and it is essential for learning. The body response to stress involves a fight and flight response in which biological changes, prepares the body for emergency action. The aim of the present study is to find out the fifteen days repeated noise, stress exposure induced alterations in the carbohydrate metabolism and its prevention by treatm...

2010
J. L. Szalma

In many modern environments noise is a pervasive and influential source of stress. Whether it is the acute result of impulse noise or the chronic effects of prolonged exposure to active machinery the challenge of noise faces many who must accomplish vital performance duties. While noise can have diffuse effects which are shared in common with any chronic form of stress, its influence can also v...

Journal: :journal of research in health sciences 0
r golmohammadi m abbaspour p nassiri h mahjub

background : the recognition of road traffic noise as one of the main sources of environmental pollution has led to develop models that enable to predict noise level from fundamental variables. traffic noise prediction models are required as aids for designing roads and highways. in addition, sometimes are used in the assessment of existing or envisaged changes in traffic noise conditions. in t...

2004
Jiann S. Yuan

This paper presents a design methodology to study RF circuit performance degradations due to hot carrier and soft breakdown. The experimental facts of DC stress on the RF properties of MOSFETs are given. The equivalent circuit model is developed and verified by measurement data. RF circuit such as a low noise amplifier is evaluated using SPICE circuit simulation. Noise figure and s-parameter de...

1998
Claus O. Wilke Thomas Martinetz

An exact formula for the distribution of lifetimes in coherent-noise models and related models is derived. For certain stress distributions, this formula can be analytically evaluated and yields simple closed expressions. For those types of stress for which a closed expression is not available, a numerical evaluation can be done in a straightforward way. All results obtained are in perfect agre...

Journal: :Physical review letters 1996
Blumenfeld

A minimal model is constructed for two-dimensional fracture propagation. The heterogeneous process zone is presumed to suppress stress relaxation rate, leading to non-quasistatic behavior. Using the Yoffe solution , I construct and solve a dynamical equation for the tip stress. I discuss a generic tip velocity response to local stress and find that noise-free propagation is either at steady sta...

2015
Sakthivel Srinivasan Wankupar Wankhar Sheeladevi Rathinasamy Ravindran Rajan

The experiences of stress are common to all living things. Noise is a pervasive aspect of many modern community and work environments [1]. According to the International Programme on Chemical Safety [2] an adverse effect of noise is defined as a change in the morphology and physiology of an organism that results in impairment of functional capacity, or an impairment of capacity to compensate fo...

Journal: :Indian journal of physiology and pharmacology 1999
K Sembulingam P Sembulingam A Namasivayam

In our earlier study, we have noticed the antistressor effects of ethanol extract of as leaves on noise induced changes in plasma corticosterone level (5). Hence, in this study, it was decided to evaluate the effect of ethanol extract of as leaves on the changes in total count (TC) and differential count (DC) of leucocytes in albino rats subjected to noise stress, because, the hematological par...

2005
Paolo Fantini Giorgio Ferrari

A detailed experimental investigation of 1/f noise in MOSFET devices as a function of technology-induced mechanical stress is presented. Strain in the channel region is obtained by the Shallow Trench Isolation (STI) technique. Both nand p-MOS have been considered inside the present study. An increasing of 1/f noise intensity with the increasing intensity of mechanical stress has been detected f...

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