Iranian Journal of Ergonomics

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Introduction: Many calls already perform by cell phones that have need to radiation exposure by users. Because of health reasons and some doubts about effects, this study was conducted to determine the extent of the mobile phones radiations and self report symptoms of users. Material and Method: In this cross-sectional study, 80 available randomly users contain students and staffs of Hamadan University of medical sciences in 2012 were selected. Electro Smog meter TES-593 was used as radiation measurements tool. In order to assess health effects of mobile phones’ radiation, a self-administered survey questionnaire were used. Statistical analyses were performed using T-test, ANOVA and X2 tests by SPSS 11.5. Results: Results showed that the conversation mode had a highest level of electromagnetic indices in the studied cell phones. Compare means of power density that emitted from studied mobile phones had significantly difference (P=0.001). Relationship between exposure to the mobile phones radiation by symptoms of head-ache, anxiety and sleep disturb were significant (P=0.02, P=0.03, and P=0.002 respectively). Conclusion: Although, there is founding the relations between exposure to cell phones electromagnetic fields and some self-reported symptoms in line with same reports, These symptoms can not be absolutely attributed to the use of mobile phones. With these considerations it is recommended that for prevention of health risks from cell phones, safe type selection, control of call duration and frequency of use of these devices should be mentioned.

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Introduction: In recent years, compact fluorescent lamps have been more widely used across the country as a means of optimizing energy consumption. Given the health consequences of lighting sources, the present study was conducted to investigate the intensity of electromagnetic fields emitted by common compact fluorescent lamps.

Materials and Methods: The study examined 54 compact fluorescent lamp bulbs manufactured in local and international factories. The intensity of the electromagnetic fields emitted was measured at a very low frequency (VLF) and an extremely low frequency (ELF) using field measuring devices (Holaday HI 3603 and HI 3604 models). The data obtained were analyzed in SPSS.

Findings: The intensity of the emitted electric and magnetic fields decreased with the increase in their distance from the sources. At the reference point of 25 cm, the effective intensity of the electric field was 2.25 v/m at the very low frequency and 15.39 v/m at the extremely low frequency. The intensity of the magnetic fields was 0.47 mA/m at the very low frequency and 9.41 mA/m at the extremely low frequency. All the values were below the national exposure limits. There was a significant difference between the effective intensity of the electric and magnetic fields based on the lamps' manufacturers (p<0.05).

Conclusion: Although the intensities of the electromagnetic fields of the lamps were lower than the exposure limits, due to lack of conclusive evidence on the biological effects of fields, minimizing the public exposure to fields is essential. The use of standard-quality lamps is therefore highly recommended as a preventive measure.