Study about Fracture Mechanics and the root cause of fracture in order to estimates lifetime for Mechanical parts in designing process and manufacturing have tremendous role in this realm. Stress intensity factor comes into design which not only is dependent to geometry also extremely to load condition; for instance, it is important in failure processes (brittle and ductile Materials) or to pre...

background: according to the biopsychosocial model, menstrual symptoms are caused not only by a combination of biological factors such as hormonal disorders and lifestyle, but also by psychological and social factors such as working environment. this study aimed to determine the relation between occupational stress and dysmenorrhea in iranian midwives. materials and methods: this prospective co...

the main purpose of this paper has been to discuss the effects of psychological stress and other environmental factors on incidence of diseases. we were specifically concerned with stress that increased susceptibility of uninfected hosts when exposed to infection. if such stresses also reduced resources, fecundity and/or survivorship, there was a reduction in the host carrying capacity. in addi...

job stressors in critical care nurses     farhadi m [1] , hemmati maslakpak m [2] *, khalkhali hr [3]     received: 22 sep , 2013 accepted: 24 nov , 2013   abstract   background & aims : n ursing is associated with a high degree of stress d ue to its nature . job stress is a challenge for the nursing profession , and its adverse effects on physical and mental health nurses, create serious probl...

In the current research work, the problem of fracture mechanics in a plate with a central hole under tensile loading is studied. The stress intensity factors are calculated for a finite plate containing two symmetrical hole-edge cracks. The problem is solved by two different methods, namely the finite element method and the FRANC software analysis. At first the finite element method is used and...

background & aim : stress is a common phenomenon in nursing profession, but novice nurses usually experience more stress. this stress can result in job dissatisfaction and quitting the occupation. this study aimed to explore the novice nurses’ experience of stress at the beginning of their clinical practice. methods & materials : this study was conducted using a qualitative content analysis. th...