of the 5,655 accidents with casualty that had occurred during 1973 in teheran, 4,936 or 87. 3% were caused by the negligence on the part of the drivers. the most accident producing driving middle-aged men of 30- 39 years, who had recently acquired driving permit and were wage earners as drivers in the city of tehran. alcohol intoxication as the cause of the accident had been recorded in only o....

A study of the incidence of R. fever in an area in southeast Teheran during the period 1972-1974 revealed 92 cases. The crude annual incidence of R. fever ranged from a high of 58 cases to a low of 51 cases per 100,000 population. The age and sex specific rates revealed the incidence to be strikingly higher in the 5-19 year age group, reaching roughly 80/100,000. There was an approximately simi...

mycotoxins and its significante in food poisoning is the subject of this communication. all four toxins attributed to aspergillus could cause this intoxication such aw incidence recent breakdownd of food poisoning among alimitted number of teheran inhabitants 1967, is reported. this brief communication, once more signifies the importance of mycotoxins in food poisoning.

As the necessity of location information closely related to everyday life has increased, use global navigation satellite systems (GNSS) gradually increased in populated urban areas. Contrary high and expectation GNSS areas, performance is easily degraded by multipath errors due high-rise buildings very difficult guarantee. Errors signals reflected buildings, i.e., non-line-of-sight (NLOS) error...

Multipath and non-line-of-sight (NLOS) signals are the major causes of poor accuracy a global navigation satellite system (GNSS) in urban areas. Despite wide usage GNSS populated areas, it is difficult to suggest generalized method because multipath errors user-specific cannot be eliminated by differential (DGNSS) or real-time kinematic technique (RTK). This paper introduces estimation mitigati...

OBJECTIVES This study was designed to evaluate the immune status of health care workers against varicella zoster in a university hospital in Teheran, Iran, and to compare the history of chickenpox infection with the presence of varicella antibodies in this population. METHODS Serologic testing for varicella was performed for 405 health care workers with different job categories and at differe...