Journal of Preventive Medicine

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Introduction: The steel industries are one of the industries that their workers are highly exposed to physical harmful agents including radiation. The aim of this study was to assess the occupational exposure to ultraviolet and infrared radiation in in a steel industry. Methods: This Descriptive - analytical and cross- sectional study was conducted in 13 workstations in a steel industry in 2014. For measurement of ultraviolet and infrared radiation direct reading instruments were used to assess the intensity of radiation entering eyes. Finally, after collecting data, statistical analysis performed using SPSS19 software. Results: The average age and job experience of the studied workers were 31.05 and 5.45, respectively. Exposure to ultraviolet radiation ranged from 1.89 to 6.3 mw/cm2. Exposure to infrared radiation also ranged from 5.02 to 49.1 mw/cm2. In all measurement stations exposure to ultraviolet radiation was more than threshold limit value. In addition, in furnace 1, furnace 2 , hoist unit, and moving wrenches unit the intensity of infrared radiation was more than threshold limit value. Conclusion: According to the findings of the present study, occupational exposure to ultraviolet radiation is more than threshold limit value and in some units, exposure to infrared radiation is more than threshold limit value and interventional measures are necessary to reduce the exposure.

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Introduction: Providing optimal lighting in the libraries can improve the students' health, alertness, and accuracy and it can also reduce their errors. The aim of this study was to evaluate the illumination and ultraviolet radiation at Hormozgan Medical Sciences University study halls in the winter of 2018.
Methods: In this cross-sectional study, the natural, artificial, and total illumination was measured at centers of designated stations in all of the eight study halls of Hormozgan University of Medical Sciences at  the height level of study tables (80cm) by a Lux meter (model: tes 1339). Ultraviolet radiation was also measured by a HAGNER EC1 instrument equipped with UVA sensor at the levels of the study tables. Finally, the data were analyzed by SPSS ver.16 software.
Results: The average of natural and artificial general illumination in respectively 62.5% and 100% of the study halls and in the case of local illumination in respectively 50% and 75% of the study halls were less than the national standard level (300lux). In addition, total illumination levels in all cases were higher than the standard value. The male students’study hall in the health faculty had the highest average of natural and total UV radiation and Paramedical school study hall had the highest average of artificial UV radiation.
Conclusion: In general, the illumination levels in the study halls were not satisfactory and in order to improve the situation, it is necessary to consider the type of lighting sources, installation height, uniform distribution of lighting, and arrangement of the windows and study tables.