سنجش مواجهه شغلی راهبران قطار های شهری با میدان مغناطیسی پایا
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Abstract:
Introduction: One of the pollutants that is developing in human life day by day is Magnetic field. In modern urban transport systems, diesel motors have been replaced with electric motors, working with alternating and direct currents, and leading to occupational exposure of drivers with magnetic fields. This study aimed to determine the urban train's drivers exposure with static magnetic fields and compare it with national occupational exposure limits. Methods: In order to measure the train's drivers exposured with static magnetic field, several samples were selected from urban AC and DC and AC intercity trains, in the 1,2,4, and 5 lines of Tehran, Iran. After determination of the sampling location, static magnetic field was measured by three axes magnetic field meter (HI-3550), according to the standard IEEE std C95.3.1 and previous studies. In order to analyze the data, SPSS software (ver. 20) was used. Results: The maximum exposure of drivers was in DC trains- line 2- (0.52 mT), meanwhile, average exposure of AC trains driver (0.095 mT) was higher than DC trains driver (0.081 mT). The average magnetic flux density between different lines has not have significant differences. The highest levels of time-weighted average exposure were related to line 1 AC train drivers (0.06 mT). Conclusion: Exposure of train’s drivers was 10 time higher than background level, indicating a significant exposure in this job. However, in none of the assessment situation, the whole body exposure of train’s drivers was not exceeded from National Occupational Exposure Level (TWA= 0.2 and ceiling= 2 T). Of course, it does not imply that this level of exposure is completely safe, because different studies have reported health problems even at lower values of the magnetic field.
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ارزیابی مواجهه شغلی راهبران قطار های شهری تهران با میدان های مغناطیسی در فرکانس بی نهایت کم
Introduction: Occupational exposure to Extremely Low Frequency Magnetic Fields (ELF-MFs) in train drivers is an integral part of the driving task and creates concern about driving jobs. The present study was designed to investigate the occupational exposure of Tehran train drivers to extremely low frequency magnetic fields. Methods: In order to measure the driver’s exposure, from each ...
full textارزیابی مواجهه شغلی راهبران قطار های شهری تهران با میدان های مغناطیسی در فرکانس بی نهایت کم
مقدمه: مواجهه شغلی با میدان های مغناطیسی با فرکانس بی نهایت کم در راهبران قطار بخشی جدایی ناپذیر از این وظیفه بوده و همین امر نگرانی هایی را از نظر سلامت شغل راهبری به وجود آورده است. مطالعه حاضر باهدف بررسی مواجهه شغلی راهبران متروی تهران با میدان های مغناطیسی در فرکانس بی نهایت کم طراحی شد. روش کار: به منظور سنجش مواجهه راهبران، از دو نوع قطار ac و dc داخل شهری و ac بین شهری از هر خط شامل خط ...
full textبررسی میزان مواجهه شغلی با میدان های مغناطیسی پایا واثرات بهداشتی آن در مراکز تصویر برداری تشدید مغناطیسی
Background and aim: Magnetic resonance imaging as one of the best medical scanning technique is considered to be the most important sources of static magnetic fields. The staffs of MRI ´s units frequently exposed to these static magnetic fields. This study aims to determine the occupational exposure level to mentioned field and its related health effects in MRI´s units. Methods: The occup...
full textبررسی میزان مواجهه شغلی با میدان های مغناطیسی پایا واثرات بهداشتی آن در مراکز تصویر برداری تشدید مغناطیسی
زمینه وهدف : تصویر برداری تشدید مغناطیسی به عنوان یکی از تکنیک های مهم تشخیصی از منابع تولید میدان مغناطیسی پایا محسوب می شود. کارکنان تصویر برداری در زمان فعالیت شغلی در مواجهه با این میدان ها قرار دارند. هدف مطالعه بررسی میزان مواجهه شغلی با میدان های مذکور و اثرات بهداشتی احتمالی مرتبط با آن در مراکز تصویر برداری تشدید مغناطیسی بود. روش بررسی: در 4 مرکز تصویر برداری شهر شیراز مواجهه شغلی 20 ...
full textارزیابی بارکار فکری راهبران قطار مترو با استفاده از سیگنال‌های ECG
Introduction: Driving a train is one of the high demand job due to high vigilance task requiring the ability to long periods monitor surrounding environment and recognizing signals. The aim of this study was to assess train drivers’ mental workload using heart rate (HR) and heart rate variability (HRV) indices. Material and Method: An experimental design was conducted among 12 well-trained sub...
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Journal title
volume 9 issue 2
pages 40- 49
publication date 2017-05
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