background and objectives: day-shift taxi drivers have a long duration of direct sun exposure. however, the efficiency of this occupational exposure in vitamin d synthesis has not been addressed yet. the aim of this study was to assess the vitamin d status of taxi drivers in tehran, and examine vitamin d status association with some anthropometric and circulating biomarkers. materials and metho...

driving is a complex psychomotor task involving distinct cognitive, perceptual and decision making skills. it needs to more concentration and alertness to driving safe. several studies have shown the potential effects of alcohol in crash production by epidemiological and laboratory analysis. alcohol is obviously the most common single cause of traffic accidents in america. a review of the relat...

the proportion of elderly in the general population is rising, resulting in greater numbers of drivers with neurodegenerative disorders such as alzheimer’s disease (ad) and parkinson’s disease (pd). alzheimer’s disease is a progressive neurodegenerative disorder typified by memory impairment with executive dysfunction, motor problems, and/or language difficulties. parkinson’s disease is a progr...

Nowadays, machine life and traffic jams are part of life and expanded. While economic and welfare benefits of the expansion of communication and the speed of transportation goods and people, the number and severity of traffic accidents increased. According to the World Health Organization, in recent years, Traffic accidents are recognized as the ninth cause of death in the world. In Iran, Traff...

Background Adequate access to health services has tremendous effects on the usefulness and efficiency of health care. Therefore, this study aimed to investigate the access of girls under the age of 14 years old to pharmacies in Kermanshah, Iran. Materials and Methods In this cross-sectional study, the access of Results In terms of access to 25 pharmacies through walking, the findings revealed ...

During oilfield development, there exist multi-cycle gas–water mutual displacement processes. This means that a cycling process such as water driving gas–gas driving water–water driving gas is used for the operation of injection and production in a single well (such as foam huff and puff in single well or water-bearing gas storage). In this paper, by using coreand micro-pore scales model, we st...

A hybrid heat pump cycle of the heat amplifier type integrating a booster compressor between the generator and the condenser for distributed heating is simulated and analyzed. The interrelation between the two sub-cycles and the hybridization principle are explored. The theoretical analysis is demonstrated by a H2O/LiBr based hybrid cycle simulation. Investigation of the interaction mechanisms ...