نتایج جستجو برای: stress strain relationship

تعداد نتایج: 1154964  

Journal: :iranian journal of medical physics 0
alireza mehdizadeh assistant professor, medical physics dept., faculty of medicine, shiraz university of medical sciences, shiraz, iran amin hosseinzadeh m.d. student, faculty of medicine, mashhad university of medical sciences, mashhad, iran

introduction: the term glaucoma refers to a group of diseases that have a characteristic optic neuropathy with associated visual field loss in common. intraocular pressure has been considered to be the only causal factor for glaucoma and the only factor that can be manipulated to alter the course of the disease. but considering high intraocular pressure as the only factor responsible for glauco...

Journal: :Journal of the Korea Concrete Institute 2011

Sharifian, SA, Yazdi, SM,

Job stress results from a mismatch between job requirements and capabilities, resources, or needs of the worker. Physiological, psychological and behavioral outcomes caused by job stress not only hurt the person but also impose expensive costs on organizations. Firefighting is a job that exposes workers to job stress. The purpose of this study is to determine the level of job stress and some re...

2007
TADASHIGE IKEDA

A simple constitutive model of shape memory alloys for analyses of tension–compression quasiplastic behavior is derived. Here, three martensitic variants are considered; namely, thermal-induced, tensile stress-induced, and compressive stress-induced martensitic variants. Reorientation from one variant to another variant is assumed to take place according to a reorientation energy criterion base...

Journal: :American journal of physiology. Heart and circulatory physiology 2012
Yunlong Huo Yana Cheng Xuefeng Zhao Xiao Lu Ghassan S Kassab

The passive mechanical properties of blood vessel mainly stem from the interaction of collagen and elastin fibers, but vessel constriction is attributed to smooth muscle cell (SMC) contraction. Although the passive properties of coronary arteries have been well characterized, the active biaxial stress-strain relationship is not known. Here, we carry out biaxial (inflation and axial extension) m...

ژورنال: ارگونومی 2015
دهقان, حبیب الله, قنبری سرتنگ, ایوب,

  Introduction: The incidence of heat stress is one of the most common problems in work environments as well as many different industries. The exposure of workers to heat results in heat strain. The purpose of the present study was to validate the Perceptual Strain Index through determining its relationship to the Physiological Strain Index and the Wet Bulb Globe Temperature Index und...

اصیلیان مهابادی, حسن, تیموری, غلام حیدر, جعفری, محمد جواد, خداکریم, سهیلا,

Introduction: Workers in open pit iron ore mines are exposed to heat stress which can cause health and safety problems. The purpose of this study was to evaluate heat stress among open-pit mine workers of iron ore based on Wet Bulb Globe Temperature (WBGT) index and also to investigate its relationship with physiological Strain. Material and Method: This cross-sectional study was conducted o...

Journal: :international journal of occupational and environment medicine 0
w agbenyikey department of environmental and occupational health, drexel university, philadelphia, pa, usa r karasek department of work environment, university of massachusetts, lowell, ma, usa m cifuentes department of work environment, university of massachusetts, lowell, ma, usa pa wolf department of neurology, boston university school of medicine, boston, ma, usa, and the framingham heart study, framingham, ma, usa s seshadri department of neurology, boston university school of medicine, boston, ma, usa, and the framingham heart study, framingham, ma, usa ja taylor department of environmental and occupational health, drexel university, philadelphia, pa, usa

background: workplace stress is known to be related with many behavioral and disease outcomes. however, little is known about its prospective relationship with measures of cognitive decline. objective: to investigate the association of job strain, psychological demands and job control on cognitive decline. methods: participants from framingham offspring cohort (n=1429), were assessed on job str...

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