heat stress effects on physical and mental health of workers and decreases human function. asphalt workers are both exposed to the heat of their working process and to the sun heat. this study aimed at evaluating thermal stress and its following function fall and the effect of asphalt work on the degree of heat stress and asphalt workers’ physiological parameters. the present study was done at ...

Epidemic outbreaks of new pathogens, or known pathogens in new populations, cause a great deal of fear because they are hard to predict. For theoretical models of disease spreading, on the other hand, quantities characterizing the outbreak converge to deterministic functions of time. Our goal in this paper is to shed some light on this apparent discrepancy. We measure the diversity of (and, thu...

Verhulst logistic curve either grows OR decays, depending on the growth rate parameter value. A similar situation is found in the Gompertz law about human mortality. However, growth can neither be infinite nor reach a finite steady state at an infinite asymptotic time. Moreover before some decay, some growth must have occurred. For example, some levelling-off could occur at finite time, followe...

Properties and experimental predictions of a broad class of supergravity grand unified models possessing an SU(5)-type proton decay and R parity are described. Models of this type can be described in terms of four parameters at the Gut scale in addition to those of the Standard Model i.e. mo (universal scalar mass), m1/2 (universal gaugino mass), Ao (cubic soft breaking parameter) and tanβ =< H...

Background and Aim: The present study aimed to investigate the flexibility of the ankle and knee joints and to determine its relationship with balance, motor function, and risk of falling in visually impaired individuals. Materials and Methods: The sample consisted of 32 blind males, 20-30 years old. They were selected by the purposeful sampling method. We used modified stork tests, tendon gai...

Numerous new bridges were needed when the railway line from London to Holyhead in Wales was built in the 1840s. The project’s chief engineer, Robert Stephenson, chose a cast iron girder design to cross the river Dee just outside Chester, and the bridge was finished in November 1846. About six months later, on 24 May 1847, a local train was crossing the final span when one of the girders failed ...