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Introduction : Considering the importance of maintaining the energy and health of the staff and faculty members as human beings, organizational conflict can have a significant impact on public health, performance, and the rate of depression in these individuals. The aim of this study was to investigate the relationship between job performance and depression with organizational conflicts in professors and staff of Larestan University of Medical Sciences.
 
Methods : This descriptive-analytical cross-sectional study was conducted in 2016 on 82 professors and staff of Larestan University of Medical Sciences  selected by census sampling method. In order to collect information in the present study, three questionnaires (organizational conflict, job performance, and Goldberg depression) were used.
Results : The mean of depression was 58.20 with a standard deviation of 17.16, the mean of job performance was 30.55 with a standard deviation of 27.5, and the mean of organizational conflict was 93.20 with a standard deviation of 42.5. Conflict with subordinate had a higher mean score and conflict with peers had a lower mean score. The frequency distribution of depression among the participants showed that healthy individuals had the highest frequency (27.7%) and individuals with severe depression had the lowest frequency (4.8%).
Conclusion : The findings showed an inverse relationship between depression and job performance, but a direct relationship was observed between depression and organizational conflict. By identifying and modifying the causes of stress in the workplace, we can see the improvement of performance and the creation of desirable and efficient feelings in medical personnel.

introduction: Coronavirus (COVID-19) has recently emerged as a global threat. Workers' knowledge, attitudes, and practices about this new infectious disease are crucial to its prevention and control. This study was conducted to the status of knowledge, attitude, and practice was determined according to the COVID-19 prevention guidelines and the factors affecting it in the service workers of Tehran Metro Line 1 in the fall of 2020
Methods: This cross-sectional (descriptive-analytical) study was performed on 113 service-cleaning workers of Tehran Metro Line 1 with a mean and standard deviation of the age of 35.38+_5.43 in the fall of 2020. Data collection tools included a demographic questionnaire and a 32-item questionnaire to assess the status of knowledge, attitude, and practice to the COVID-19 prevention guidelines (with optimal validity and reliability). Answers were measured with pros, cons, no comments. Findings were presented by descriptive and analytical statistics and data analysis was performed by analytical tests of SPSS software version 25 with a significance level of p <0.05.
Results: The results of the study showed that in the field of knowledge, attitude, and practice with 74.9%, 83.2%, and 99.2% of the participants were at a good level, respectively. There was a significant relationship between age and attitude of participants in the study (p <0.05) so that the The attitudes of 30-34 years old were significantly different from the attitudes of other age groups There was also a significant positive relationship between education and performance of participants (p <0.05), people with a bachelor's degree had better performance. The relative frequency of non-COVID-19 infection in the study participants from the beginning of the disease until now (autumn 1399) was 68.1%.
Conclusion: In order to correct misconceptions and promote awareness and attitudes of the population of the study about COVID-19 , it is recommended that education and information be provided through the media. The good level of knowledge, attitude, and practice of the service workers - cleaning the subway towards the Covid-19 virus, had caused the incidence of coronary heart disease among them to be almost 30%. In this regard, the distribution of appropriate personal protective equipment, daily disinfection of subway stations can be effective factors in reducing the incidence of workers.

Abstract
Introduction: One of the main components of the contractor management system is the assessment of their Health, Safety, and Environmental (HSE) performance. Therefore, the purpose of this study is to provide a practical structure for evaluating HSE performance at the contractor level.
Methods: In this analytical study, the main factors were selected according to the seven main elements of HSE management system and then the sub-factors related to each main factor were determined. Then the questionnaires were sent to experts for weighting in terms of the degree of importance of the main factors and sub-factors. Based on the output of experts 'opinions, the relative importance of the main and sub-factors was calculated and the HSE performance evaluation model was created in the contractors' organization level. Finally, in order to validate, the proposed structure was investigated at the organization level of three main construction contractors of a specialized petrochemical parent company.
Results: The final model consists of 7 main factors and 119 sub factors. The maximum achievable score is 300 and the minimum is 60, which indicates a very good and very poor level of performance in terms of HSE, respectively. The performance evaluation results showed that the first contractor has scored higher in terms of HSE than the second and third contractors.
Conclusion: Due to the comprehensiveness of proposed structure, it could be used to evaluate the performance of the organizational level of different contractors which the results of the evaluation could be used as an input criterion for the selection of contractors. In addition, contractors can identify their organizational weaknesses in the HSE field and try to eremove them and improve their HSE level.

Introduction: Workers' health status is one of the main factors affecting industry productivity. Therefore, effective employee periodic examinations are important not only for the benefit of industries and for improving the health of workers but also for the health of the community.
Methods: This descriptive study was done in98 on 60 cases of industries of Kashan that they had occupational health expert. The tools were occupational medicine items Ministry of Health checklists after weight by Analytical Hierarchy Process. Data were analyzed by SPSS 21 software.
Results: Assessing the occupational medicine status of Kashan industries with this checklist showed that according to cut-off point 70, 18 industries (30% of the industries) scored poorly. Results of linear regression analysis showed that there is a significant relationship between work experience of occupational health experts with occupational health status of industry (P <0.05).
Conclusion: Due to the evaluation and prioritization of 10 items of occupational medicine status in Kashan industries, it is suggested that the relevant authorities in their health interventions consider these priorities

Purpose: In recent years, safety has become an important issue in developing countries and has attracted much attention from many organizations. In this regard, the present study aims to investigate the effect of organizational culture on safety performance in the regional electricity distribution organization in Gilan province.
Methods: The present research is an applied descriptive study. The statistical population of the research included 1311 employees of regional electricity distribution organization of Gilan province, 286 of whom were chosen as the sample through random sampling method and the required data were collected using the questionnaire. After examining the validity (content) and reliability of the questionnaire, the research hypotheses were tested using structural equation modeling method and based on Smart PLS2 software.
Result: The findings show that (1) management commitment culture to safety on creating a safe work environment, (2) creating a safe work environment on concurrent engineering, (3) creating a safe work environment to design-for-safety and (4) design-for-safety on safety performance, have a significant effect. However, the effect of concurrent engineering on safety performance was not confirmed. The results also indicate that the model variables explain 73.9% of safety performance variations.
Conclusions: The results can be used as a suitable procedure to explain the safety performance of employees of regional electricity organization in Gilan province. In addition, they provide a situation for managers to develop policies to improve safety performance by promoting predictive variables.