objective: cancer creates a lot of stress and can significantly affect quality of life. the purpose of this study is to investigate the role of stage of disease, illness perceptions, unmet needs and fatigue in predicting the quality of life of patients with cancer. method: the sample consisted of 120 hospitalized patients in tehran's shohada hospital in 2014 that was selected purposefully....

One of the most commonly and thoroughly studied paradigms of human performance is fatigue. However, despite volumes of research there remains considerable controversy among scientists regarding definitive conclusions about the specific mechanism(s) contributing to fatigue. Within the literature there are three primary yet distinctly different governing ideas of fatigue; the traditionally refere...

In 2010 the Australian Civil Aviation Safety Authority (CASA) published a paper titled ‘Biomathematical Fatigue Modelling in Civil Aviation Fatigue Risk Management: Application Guidance’. In March 2014 an updated version of this document titled ‘Biomathematical Fatigue Models Guidance Document’ was released. The intent of the documents is to provide the aviation industry with updated guidance o...

This paper presents a fatigue assessment model that was developed for corroded reinforced concrete (RC) beams strengthened using prestressed carbon fiber-reinforced polymer (CFRP) sheets. The proposed model considers the fatigue properties of the constituent materials as well as the section equilibrium. The model provides a rational approach that can be used to explicitly assess the failure mod...

Static and fatigue data available in literature concerning carbon fiber reinforced composite laminates subjected tension-tension fatigue were re-elaborated in the framework of a two-parameter fatigue model explicitly accounting for the cyclic as well as the mean stress. The data were used to obtain the model parameters by best fitting procedures. A primitive statistical implementation of the mo...

many procedures suggest for reduction of responses of riser to vortex induced vibrations (viv). natural frequencies of marine risers is an important parameter that can affect the responses of riser to viv. change of riser properties such as top tension and bending stiffness can alter natural frequencies. in this study effects of riser specifications on the responses and fatigue damage of marine...

A new mixed-mode threshold stress intensity factor is developed using a critical plane-based multiaxial fatigue theory and the Kitagawa diagram. The proposed method is a nominal approach since the fatigue damage is evaluated using remote stresses acting on a cracked component rather than stresses near the crack tip. An equivalent stress intensity factor defined on the critical plane is proposed...