Engineering
Reza Kolbadinezhad; Ebadollah Amouzad Mahdiraji
Abstract
Due to the accelerated trend of transferring most of the activities to contracting companies, the rate of indicators related to occupational accidents has grown alarmingly and has led to the discussion of evaluating and selecting construction contractors in terms of health. Safety and the environment ...
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Due to the accelerated trend of transferring most of the activities to contracting companies, the rate of indicators related to occupational accidents has grown alarmingly and has led to the discussion of evaluating and selecting construction contractors in terms of health. Safety and the environment are of paramount importance. The presented model was performed by analyzing quantitative studies as well as completing a specific questionnaire and field surveys, and the sample size was determined to be 252 with a 95% confidence level and a 5% error probability. The test method was performed using Cameo and Bartlett test and confirmatory factor analysis. The results of the present study indicate that the highest intensity of impact is related to the human resources criterion and the lowest intensity is related to the planning criterion. The proposed model can meet the growing need of organizations for a comprehensive model of evaluation and selection of contractors.
Engineering
Ebadollah Amouzad Mahdiraji; Reza Kolbadinezhad
Abstract
This study aimed to investigate the status of the establishment of occupational safety and health management system and environmental management system on environmental factors and employee satisfaction. This paper was a quasi-experimental study of before and after type that was conducted in 2012 in ...
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This study aimed to investigate the status of the establishment of occupational safety and health management system and environmental management system on environmental factors and employee satisfaction. This paper was a quasi-experimental study of before and after type that was conducted in 2012 in Milad Industrial Complex based on the results of measuring occupational and environmental pollutants. Data collection was structured through a form and a questionnaire. The validity of the questionnaire was confirmed by content validity and reliability by Cronbach's alpha (r = 81%). The statistical population of the study using Cochran's formula (α = 95%) consisted of 100 employees by random sampling method. After the installation of the systems, the average sound intensity decreased from 54.79 dB to 72.51 dB, the percentage of stations with the allowable light intensity increased from 8.30% to 4.70% and the number of gases and vapors Decreased from 14.2 to 11.4 mg/m3. In the evaluation of the number of suspended particles, carbon monoxide was reduced from 0.143 to 0.062, and carbon dioxide from 0.28 to 7.49 and was within the standard range. Employees' satisfaction analysis of the environmental conditions showed that the majority of employees in the statistical community (88.7%) are satisfied. The simulation results show that with the establishment of occupational safety and health management systems, environmental factors in the organization are controlled and with the improvement of environmental conditions, employee satisfaction increases and individual and organizational performance improves.
Engineering
Reza Kolbadinezhad; Ebadollah Amouzad Mahdiraji
Abstract
Exposure to dust in the air is one of the most common environmental hazards in workshops that can have devastating effects on health. In this study, workers' exposure to particles in inhaled air by conventional methods as well as GIS has been investigated. The research was performed cross-sectionally-analytically ...
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Exposure to dust in the air is one of the most common environmental hazards in workshops that can have devastating effects on health. In this study, workers' exposure to particles in inhaled air by conventional methods as well as GIS has been investigated. The research was performed cross-sectionally-analytically and the sample size was determined through homogeneous exposure groups and environmental and individual exposure was performed based on standard methods and individual and environmental sampling methods. The obtained data were analyzed using GIS software to determine the distribution maps. In this paper, the mean concentration of exposure to dust for each individual in the matched exposure groups was 8.361 mg/m. The highest level of individual exposure was estimated in the powder operator with a value of 21313 mg/m3 and the lowest in the fine wire emperor with a value of 1.97 mg/m3. The minimum environmental concentration in the cutting hall was 0.305 mg/m and the maximum value was 22 mg/m3 in the powder hall. The results of the evaluation with AIHA criteria in all methods showed that weaving, material, and packaging halls have the highest concentration and cutting halls have the lowest dust concentration. Comparison with the GIS method showed that powdering, materializing, and packing halls have the highest concentration and cutting halls have the lowest dust concentration. Comparison with the GIS method showed that in this method, more people are classified in the risk area.