The application of magnesium alloys is greatly limited because of their relatively low strength and ductility. An effective way to improve the mechanical properties of magnesium alloy is to refine the grains. As the race for better materials performance is never ending, attempts to develop viable techniques for microstructure refinement continue. Further refining of grain size requires, however...

A 43-year-old middle-eastern woman was visited with a 15-year history of multiple painful cutaneous nodules on her back. The first lesion appeared on her back when she was 28 years old. As she aged, the lesions became larger, more numerous, and more painful with cold or physical contact. Her medical history was not significant. The patient’s medications included naproxen, calcium-D, and vitamin...

to study yield and its relationships with yield components in 10 varieties of foxtail millet (kfm1 to kfm10), an experiment was carried out in safiabad agricultural research center in rcbd design with three replications for a period of three years (2003 to 2005). vegetative and reproductive characteristics of each cultivar were recordered during the growing seasons. three year results showed si...

purpose: to determine the musculoskeletal complaints associated with using computer and its   ergonomic risks for office workers of a medical sciences university in tehran.   materials and methods: in this cross-sectional study, a background questionnaire was used   to determine individuals and computer use habits’ characteristics. a total number of 164 office   workers of aja university of med...

Objective: Low back pain is one of the most important job injuries among emergency medical personnel. This study was carried out to investigate the prevalence of low back pain as well as its physical, mental and managerial predisposing factors among emergency medical personnel in Iran.Methods: In this analytical cross-sectional study we recruited 298 pre-hospital emergency medical personn...

volcanic landform can be as terrain legacies from the past to the present era be considered. these heritage of land in terms of their unique characteristics can be considered as geomorphosite in the scientific community and the public. the evaluation of resources is one of the most important tasks of geotourism research.and thereby become profitable and thriving tourism industry in their own di...

an increasing world population and the competitive nature of the stone fruit market, particularly nectarines [(prunus persica var. nectarine)], demand the selection of fruit with high quality attributes, flavor, and a wide range of maturity. information on this subject is limited at the present time. in search of superior nectarines, a trial was conducted to study growing degree days (gdd), ful...

northern regions of khuzestan province are suitable areas for soybean cultivation. hybridization blocks and soybean segregating generations were established in safiabad agricultural research center during 1990-1997 to produce new soybean lines which would have a high seed yield and high adaptability to the region. line l.14 selected from segregating generations of a hybridization between cultiv...