I. Arefian, H. Asady, M. R. Monazam Esmaielpour, Z. Zolghadr, M. Zarif Yeganeh,
Volume 5, Issue 3 (9-2015)
Abstract
Introduction: Vehicle engine id one of the main sources of noise which its level is influenced by various parameters. The aim of this study was to investigate the impact of motor oils quality before and after oil change on the variability of vehicle engine induced noise level.
In this study it is tried to follow-up the efficacy of motor oil quality on engines sound level.
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Material and Method: First, engine noise of 94 vehicles were recorded for 30 seconds before and after oil change and all the vehicles technical information including mileage, type of motor oil, and type of vehicle were registered. Following, the recorded noises were calibrated in semi-anechoic chamber and the sound pressure levels were measured with A and C-weighting network and main octav bands, using a sound level meters. The obtained results analyzed using SPSS software version 17.
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Results: The effects of motor oil quality on different noise levels of engines were determined and a significant reduction in noise level of vehicles engine was observed. Investigation of the relationship between mileage and motor oil quality on various engines sound level manifested that vehicles with mileage ranged 100000-150000 miles had significant reduction in their sound pressure levels in comparison with other vehicles.
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Conclusion: The results revealed that engine oil is among factors reducing the vehicle engine induced noise level. Moreover, the engine oil type and the vehicle mileage are key variables which determine the impact of engine oil quality on reduction of the sound level of vehicles engine.
Hadi Asady, Adel Mazloumi, Morvarid Zarif-Yeganeh, Mostafa Hosseini, Mahin Haghshenas, Parisa Hajizadeh-Moghadam,
Volume 7, Issue 1 (4-2017)
Abstract
Introduction: One of the important consequences of globalization and development, especially in developing countries, are occupational accidents. As, today the economic burden due to these accidents is remarkable on the country’s economy. The aim of this study was financial estimate of the productivity loss due to work-related deaths in Iran in 2013.
Material and Method: In this study, occupational accident data were used registered in the environmental and occupational health center, in Iranian Ministry of Health and Medical Education. A formula used by the Centers for Disease Control and Prevention America (CDC) was used to estimate the productivity loss. Finally, after replacing the necessary parameters amount of productivity loss was calculated.
Result: The total lost years of life were calculated 1293.15 years due to the deaths caused by occupational accidents. The total amount of monetary loss due to the productivity loss in the country, was estimated 730513.06 Rials. The greatest loss was in the 59-50 years old age group.
Conclusion: The negative rate of productivity, the large quantity of the discount rate, low life expectancy in the country as well as the low wages of the workers, are the likely reasons for minimal negative impact of the workforce deaths on the country’s productivity.
Reza Yeganeh, Rasoul Yarahmadi, Zabiholah Damiri,
Volume 10, Issue 3 (8-2020)
Abstract
Introduction: Occupational health is one of the important issues that can affect productivity and economic development of an organization. This study aimed to determine the effect of didactic interventional Ergonomic-Safety program on workers’ productivity of an assembling industry.
Methods and Materials: This interventional study was conducted on 54 workers of assembling part of an electronic industry. Firstly, QEC method was used for Ergonomic assessment of work place and Hersey-Goldsmith questionnaire was applied for assessment of productivity. Then a comprehensive program was provided using findings of first stage assessment and identifying of existing failures. Second assessment of Ergonomic condition and productivity was done again by using QEC method and Hersey-Goldsmith questionnaire within three month of interventions. Data was analyzed by using of R software.
Results: Mean total productivity score and mean whole body score of QEC were 75.24 and 99.40 in before intervention phase respectively. In after intervention phase, Mean total productivity score and mean whole body score of QEC were 80.16 and 97.92 respectively. Data analysis by paired-samples t-test shows that difference of productivity score in before and after intervention phase was significant (P-value˂0.05). But difference of whole body score of QEC score in before and after intervention phase was not significant (P-value>0.05).
Conclusion: Accomplishment of Ergonomic-Safety intervention had a positive effect on productivity score whereas had not significant effect on general condition of body limbs.
Narmin Hassanzadeh-Rangi, Bayan Hosseini, Yeganeh Akhtari, Ehsan Farvaresh, Yahya Khosravi,
Volume 15, Issue 1 (3-2025)
Abstract
Introduction: This study aimed to profile Iran's occupational health services and identify the challenges and implementation strategies, with a focus on the coverage of these services and interventions.
Methods: This mixed-method research utilized a triangulation approach to generate qualitative data through document reviews from international organizations such as the WHO and ILO, examination of national occupational health systems, laws and regulations, previous studies, and interviews. Quantitative data were collected from a national portal using a standard inspection checklist and secondary data from the National Statistics Center. Qualitative data were analyzed using both inductive and deductive content analysis, while quantitative data were analyzed using descriptive statistics.
Results: The occupational health services profile for Iran was developed, comprising 45 indicators across 9 areas and 6 types. The coverage levels for inspection services were 93% for covered workplaces, 39% for all existing workplaces, 92% for covered workplaces, and 15% for all existing workers. Among covered workplaces, access to full health facilities was at 48%, while occupational exposure control was at 18%. For covered workers, the coverage rates for occupational examinations, health training, and use of personal protective equipment were 58%, 62%, and 66%, respectively.
Conclusion: The key intervention for improving service coverage and stability—aside from inspections, which are governed—lies in outsourcing services to various providers. This approach involves removing existing barriers and enhancing service provision for small workshops. Additionally, redesigning occupational health services should focus on modifying educational curricula, research, and implementation programs, emphasizing the economic aspects of controls, prioritizing low-cost and effective measures, especially in small workplaces.
