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Abstract: Aim and Background: Today, with the growth of different dimensions of sustainable development, managers at the organizational and governmental levels have become more and more interested in the components of sustainable development. A healthy and productive human being is at the core of sustainable development. Many factors are contributing to sustainable development, including human, economic, social, industrial, cultural, as well as health, safety, environmental and energy (HSEE) factors. In this regard, the existence of several processing indicators is important in promoting the program and organizational goals at the micro and macro levels. Since continuous evaluation and monitoring of all indicators is not feasible, developing a set of principles to facilitate managerial decision-making processes and monitoring continuous improvement of systems is an important issue in system performance management. Due to the vital role of correct selection of principles in the sustainability of the integrated management system, it is important to consider the key components involved in this choice. The present study aimed to prioritize the HSEE processing indexes in the integrated management system (HSEE IMS) of the Ministry of Industry, Mining and Trade. Methodology: The statistical population of this study is professionals and experts with occupational health, safety, environment, and energy orientation and work experience. In this study, to obtain process, safety, health, environmental and energy processing indicators, firstly, a list of environmental, safety, health, and energy indicators was prepared and evaluated, by using a set of indicators presented in scientific and credible research and articles, the Iranian Environmental Agency, HSE Ministry of Oil, HSEE Ministry of Industry, Mine and Trade, including mining and industrial organizations, including Industrial Development and Renovation Organization of Iran (IDERO), Iranian Mines and Mining Industries Development and Renovation Organization (IMIDRO) and other sources. In the present study, being SMART is the main selection criterion for indices, which are weighted as the five main affecting criteria by the AHP method. Weighted criteria were used to prioritize the eight principles of HSEE management including policy, continuous improvement, do, check, monitoring, and measurement of the system, commitment and leadership, planning and corrective action using the fuzzy TOPSIS technique. Results: The results show that the executive strategic index with a closeness coefficient of 0.937 was selected as the first priority. Continuous improvement and corrective action with the coefficient of closeness of 0.133 and 0.108 were selected from the weaker priorities of the Eight HSEE indices, respectively. Conclusion: Appropriate selection of indicators to facilitate managerial decision-making processes, optimal monitoring of these indicators with maximum efficiency and minimum cost is possible by using multi-criteria decision-making models. Based on the results, sustainable development can be achievable by ranking and prioritizing the HSEE processing indicators to facilitate managerial decision-making processes and monitor continuous improvement of systems to protect individuals, property and reduce accidents and pollution. Keywords: Prioritization, HSEE, Sustainable Development, Fuzzy TOPSIS, Index, Weighting, AHP. Introduction Preventing health, safety, the environment, and energy injuries and accidents by taking into account the health, safety of employees, customers, contractors and others requires a unified management system structure. This system tries to create a healthy, pleasant and joyful environment free from accident, damage and waste by integration and synergy of human resources and facilities. The present study aims to key and prioritize strategic principles in the HSEE integrated management system of the Ministry of Industry, Mine and Trade to evaluate the performance based on specific processes in subsidiary industrial-productive units. Methodology In this study, to obtain safety, health, environmental, and energy processing indexes, firstly, a list of environmental, safety, health, and energy indicators was prepared and evaluated, by using a set of indicators presented in scientific and credible research and articles, the Iranian Environmental Agency, HSE Ministry of Oil, HSEE Ministry of Industry, Mine and Trade, including mining and industrial organizations, including Industrial Development and Renovation Organization of Iran (IDERO), Iranian Mines and Mining Industries Development and Renovation Organization (IMIDRO) and other sources. Then, the SMART metrics including specificity, measurability, achievability, realism and being timely have weighted as five effective criteria by the AHP. After keying the HSEE strategic indicators of the Ministry of Industry, Mining and Trade, including: policy, continuous improvement, do, check, system monitoring, commitment and leadership, planning and corrective action were selected. Initial questionnaire was prepared based on the fuzzy TOPSIS method and key indicators and research criteria. Then, the reliability (internal consistency) and validity of the questionnaire were assessed and finalized. After completing the questionnaires and receiving the information, the expertschr('39') answers in the form of verbal statements were transformed into triangular fuzzy numbers with the capability of analysis. In the present study, to obtain effective indicators for identification and evaluation of key indicators, the five SMART criteria were weighted based on the AHP method. After weighting the research criteria using the AHP method, this ratio is used for weighting the key indexes by the fuzzy TOPSIS method to rank and prioritize. Results The results show that the face validity and content validity of the questionnaire were determined by FVR = 78.08% and CVR = 88%, respectively which have acceptable validity based on Lawshe’s model. The reliability of the research questionnaire was estimated by the appropriate Cronbachchr('39')s alpha equivalent in 0.935, illustrating the intrinsic homogeneity of the evaluated indices. Regarding weighting results, research criteria, weighting criteria and indices are presented in Tables 1-2. Table1. Final weight of criteria by the AHP method Realism Achievability Timely Specificity Measurability Criterion 0.300 0.203 0.135 0.231 0.341 Final Weight Table 2. Closeness coefficient and rank of HSEE processing indicators of Ministry of Industry, Mine and Trade Ranking CCi Criterion Commitment and Leadership 0.491 3 Policy 0.403 4 Planning 0.226 5 Do 0.937 1 Monitoring 0.699 2 Check 0.193 6 Corrective Action 0.108 8 Continuous Improvment 0.133 7 Conclusion Appropriate selection of indicators to facilitate managerial decision-making processes, optimal monitoring of these indicators with maximum efficiency and minimum cost is possible using multi-criteria decision-making models. This study aimed to weight, key and prioritize HSEE process indicators for the first time in Iran at the level of the largest executive-economic system. According to the results of the study, due to the high speed and efficiency of HSEE units in subsidiary organizations, do index (CCi = 0.937) was first priority and continuous improvement (CCi = 0.133) and corrective actions (CCi = 0.108) were found as the weakest priorities of the HSEE eight indicators because of weaknesses in the regular and systematic follow-up of regulatory units or lack of appropriate tools to evaluate these indicators. The results of this study showed an interesting convergence between the weight and prioritization of SMART criteria of strategic indicators of Ministry of Industry, Mine and Trade. This conclusion can help managers select key performance indicators based on SMART criteria and help them choose sustainability indicators that prevent wasting time and cost.

Background and aims: The diversity of health, safety and environmental issues (HSE) and limitations of the resources hinders response to all the research needs in the field of HSE. HSE promotion and policy making require research based on the real needs and problems of the society. Although, the budget allocated to the research is limited, this budget is not optimally utilized in present situation of Iran. Therefore, setting research priority in HSE is important to direct the flow of resources to the real needs of the society. This study aims to define research priorities in the field of HSE with the use of experts’ and other stakeholders’ opinions. Methods: The qualitative research method was used in this study. The proposed model of Council on Health Research for Development (COHRED) was applied in five stages including stakeholder analysis, situation analysis, identifying research topics, scoring research priority using defined criteria and prioritizing researches based on maximum agreement. The first stage was stakeholder analysis, the centers, institutions, organizations and universities related to HSE field were identified through review of literature, investigating Iranian scientific journals and by asking the experts. Also, the contact information of 70 experts, professionals, and stakeholders who were members of health centers, institutions or universities in the field of HSE were collected. In the second stage, an extensive search was done on the literature and published scientific articles from 2014 to 2019 in google scholar. The articles were selected through investigating the title and abstract of the articles and then studying deeper into the texts. Also, the official websites of Ministry of Health and Medical Education, Ministry of Cooperatives, Labor and Social Welfare, Ministry of Industry, Mine and Commerce were examined. The third stage was to identify the research topics and occupational areas, which was done by using the classification of International Labor Organization and also through brain storming of the experts. The fourth stage was scoring the priority of researches in each occupational area and research topic based on criteria such as necessity of research, appropriateness of the research to the target population, feasibility of researches based on the available resources and the research outcome. Scoring was done in a panel discussion based on a Likert scale of 1 to 9 by experts; one represented the lowest and represented the highest priorities. The fifth step was to prioritize the researches based on mean score given by the experts. Results: Situation analysis of studies in the field of HSE from 2014 to 2019 in Iran showed that most studies have been conducted in industries. According to experts, in the field of health and environment, the highest research priority was given to agriculture, fisheries, and livestock, and the highest priority to safety was given to workers in industry and mines, construction and driving. Also, workers in medium and small scale constructions and workers in small and medium industries and mines had the highest priority in the ten research areas in health and safety. Agriculture, fisheries, husbandry and poultry had the highest priority in most of the ten research areas in environment. Among the three HSE domains, in the managerial and sales jobs, the research priority was given to occupational health research. Priority research in health care, industries and mines and construction, service, armed forces and driving related jobs were given to safety related researches. In agriculture, fisheries and husbandry, the priority of research was given to environmental issues and then to occupational health. In the area of occupational health, the highest priority in managerial occupations was given to the researches that assess impact of different program. In sales jobs, the highest priority was given to the research area of developing new interventions or solutions. In large scale industries and mines, the highest priority was given to the researches that are related to developing interventions or solutions, but in medium and small industries and mines, the highest priority was given to the researches that assess the impact of a program or intervention. In the field of medium and small-scale construction workers, the highest priority was given to the research area of qualitative or quantitative situation analysis and assessing the causes of a problem. In the service occupations, the highest priority was given to the research area of qualitative or quantitative situation analysis. In the military occupations, the highest priority was assigned to the research area of developing new interventions or solutions. In large scale agriculture, fisheries, husbandry and poultry industries, the highest priority was given to the research area of determining the trends of a situation or problem. In agriculture, fisheries, husbandry and poultry industries of medium and small industries, the highest priority was assigned to the field of evaluation of the impact of programs. In the driving jobs, higher priority was given to the research area of developing new interventions or solutions. In the area of occupational safety research, the highest priority in managerial occupations was given to the research domain of cost effectiveness or cost benefit analysis. In the health care occupations, the highest priority was given to Evaluation of the interventions. In sales jobs, the highest priority was given to the research area of developing new interventions or solutions. In the field of large-scale mining and industrial workers, the highest priority was given to research in developing new interventions or solutions. In the field of medium and small-scale industrial and mining workers, the highest priority was given to evaluation of the interventions. In the field of large industrial construction, the highest priority was given to determining the trends of a situation or problems and developing new interventions or solutions. In the service occupations, the highest priority was given to the research area of developing new interventions or solutions. In the military occupations, the highest priority was devoted to the research of developing new interventions or solutions and evaluation of the interventions. In agriculture, fisheries, poultry, and small and medium-sized industries, the highest priority was given to evaluation of the impact of programs. In the driving jobs, the highest priority was given to the research area of developing new interventions or solutions. In the area of environmental research, the highest priority in managerial occupations was given to determining the trends of a situation or problems and developing plans or strategies. In the health care jobs, the highest priority was given to the evaluation of the interventions. In sales jobs, the highest priority was given to the qualitative or quantitative situation analysis. The highest priority was given to developing new interventions or solutions for workers in large-scale industries and mines. For workers in the field of medium and small industries and mines, the highest priority was given to developing plans or strategies. The highest priority was given to developing plans or strategies for workers in the field of medium and small scale construction. In service jobs, the highest priority was given to qualitative or quantitative situation analysis. In military jobs, the highest priority was given to determining the trends of a situation or problems and evaluation of the interventions. In agriculture, fisheries, husbandry and poultry industries, the highest priority was given to qualitative or quantitative situation analysis and determining the trends of a situation of problems. In agriculture, fisheries, poultry, and small and medium-sized industries, the highest priority was given to evaluation of the interventions and evaluation of the impact of programs. In the driving jobs, the highest priority was given to the determining the trends of a situation or problem. Conclusion: Most studies in the field of HSE have been conducted in industry. It is required to expand the HSE research based on the priorities set out in this study.

Background and aims: All construction projects carry some levels of risk. The construction projects involve numerous uncertainties, multiple intricacies, varies techniques, and divergent environments. So that, workers in the construction industry are at greater risk because of the dynamic nature of the activities and momentous changes in working conditions in comparison with other industries. The construction projects involve many factors, interdependencies, and correlations, which makes determination of exact cause and effect very difficult. Therefore, these factors play a significant role in decision making and may affect performance of a project. The construction process frequently requires workers to work at height. The risks associated with working at height are often increased by adding accessibility and mobility restrictions. Falling from height is one of the most important causes of workerschr('39') fatality in the construction industries and constitutes a paramount part of the safety plans in the construction projects. Identifying the effective factors and sub-factors in the occurrence of this accident will be helpful in setting priorities for preventing and providing solutions in reducing their severity. The purpose of this study was to investigate and identify the factors and sub-factors affecting falling from height accidents and to determine the cause and effect relationships among them in the construction projects, using the fuzzy-DEMATEL technique. Methods: In order to carry out this descriptive-analytical study, information of the Occupational Health and Safety (OHS) department of five construction projects have been used. The statistical society of the present study was the workers of five construction projects of a gas refinery in the south of Iran, which 4000 people, on average, were involved in these projects from 2011 to 2015. After reviewing the scientific literature, project reports, and guidelines, factors and sub-factors affecting the occurrence of falling from height accidents in the construction projects were determined based on the experts opinions. Snowball method was used to identify experts and determine the statistical society. Fuzzy-DEMATEL technique, as one of the methods of decision making based on paired comparisons, was used to identify the cause and effect relationships among factors and sub-factors. Based on this technique, the pairwise comparison matrices of the factors and sub-factors were formed and sent to 10 health and safety experts. Next, the views of experts were aggregated via the mean fuzzy method, and then the cause and effect relationships were determined based on them. The step-by-step process of the research is as follows: Step 1: Identifying research factors and sub-factors All of the reported events were investigated between 2011 and 2015 and 74 out of 377 occupational accidents were considered as falling from height accidents. Considering the information of OHS department and literature review of effective factors in the occurrence of construction accidents, 70 factors and sub-factors were identified as effective factors in falling from height accidents. According to the objectives of the study and status of the projects, the identified factors and sub-factors divided to 3 main factors (organizational, individual, and environmental factors) and 14 sub-factors (management commitment, safety culture, mutual understanding, supervision/inspection, and size organization/project as an organizational factors; education, training hours, personal protective equipment (PPE), age/experience, and psychological/occupational stresses as an individual factors; thermal stress, interference, level smoothness, work platform height as an environmental factors). Step 2: Data analysis and use of DEMATEL technique In this research, Fuzzy-DEMATEL technique was used to construct a sequence of extracted data. This technique is one of the decision making methods based on pair comparisons with the benefit of expert’s judgment. The concept of this approach is based on the assumption that a system consists of a set of criteria and the pairwise comparisons of relationships between these criteria can be modeled by mathematical equations. DEMATEL technique is an approach to identify the cause and effect relationships among multiple factors in order to properly understand the problem. In general, it is very difficult to determine the opinion of experts with precise numerical values, especially in terms of uncertainty since the results of the decision depend heavily on unclear and subjective arbitrary judgments. These uncertainty conditions have led to the introduction of a fuzzy logic in the metamaterial technique. Therefore, in the Fuzzy-DEMATEL technique, fuzzy language is used which facilitates decision making in uncertainty conditions [37]. All calculations were performed in Excel (version 2013). The steps to implement this technique have been presented step-by-step based on the study of Li et al. I) Calculation the direct relation matrix: After gathering the expertschr('39') view, a fuzzy direct relationship matrix ( ) was formed and the fuzzy mean method was used to aggregate the views of experts. Assuming that n experts have expressed their idea about the relationship between the indices and each component of the fuzzy direct matrix is displayed by then by can be calculated from Eq. (1) as follows: II) Normalizing the direct relation matrix: To normalize the values of the direct contact matrix, of each row must be calculated. Then, the fuzzy normal matrix ( ) can be calculated from Eq. (2) by dividing each component of by the maximum attained : III) Calculation of the total-relation matrix To calculate the total-relation matrix, the fuzzy normalized matrix is divided to three definite matrices as follows: Then, the identify matrix is formed and the following operations are performed: Then, the fuzzy total-relation matrix is computed by using Eq. (4). Results: The results of this research showed that among the main factors, organizational and individual factors were known as causal factors, which indicates importance of these factors and their impact on other effective factors in falling from height accidents. On the other hand, among various sub-factors, the management commitment, safety culture, monitoring and inspection, organization/project size, education, and work platform height had the highest effects on the falling from height accidents and were considered as causal variables. In the present study, management commitment, as one of the organizational sub-factors, had the highest impact and was considered as a causal variable. According to the findings of this study, it can be concluded that four organizational sub-factors of mutual understanding, management commitment, safety culture and organization/project size, one individual sub-factor of education, and work platform height as an environmental sub-factor had the significant impact and were among the causal variables, while the rest of sub-factors were the effect variables. Also, the monitoring/inspection sub-factor has the highest interaction with and impact on other sub-factors. Conclusion: Falling from height is considered as one of the most important accidents, leading to death and physical injuries in construction projects. The findings of this study showed that a greater attention to organizational factors and their dimensions (as hidden and effective causes to prevent falling from height incidents) is necessary since an organization plays an important role in the design of work processes, design and implementation of safety management systems, commitment to safety and employee participation, and choosing the best people according to the requirements for the health and safety programs of the projects. The results of this study also showed that it is necessary to pay more attention to the management commitment and awareness of the workforce by training them in the construction projects. Hence, a greater attention to organizational factors and their sub-factors in the construction industry is essential for preventing falling from height incidents. Therefore, more attention to the organizational factor and its sub-factors in the construction industry is required to prevent falling from height accidents. Keywords: Falling from height, Fuzzy-DEMATEL technique, Construction projects, Workers.

Background: Of common scientometric indices is evaluating the performance and scientific collaboration of journals and organizations. Iran Occupational Health Journal belongs to Iran University of Medical Sciences and committed to providing scientific evidence for improving occupational health. Based on the importance of health at work, this study aimed to evaluate the Journal’s performance and scientific collaboration in the field. Methods: This is a scientometric study using both citation and content analyses. Complete enumeration survey method and Scimago data were used to collect all information about published articles between 2012 and 2017. Content analysis was performed to find about the articles’ dominant subject area. The data on the number of authors, the authorschr('39') organizational affiliation, the type of articles, and the affiliated centers with the most number of articles were reported. Data were analyzed using Excel 2016 software. Results: The Journal’s performance in various indices such as reducing the time between receive and accept of papers has had an improving trend for 6 consecutive years. The Journal has published mostly in subjects of ergonomics (59 articles) and then safety (52 articles). The Journal’s SJR in Scopus has had an increasing trend from 0.101 in 2012 to 0.220 in 2017. Conclusion: Based on the collected data and Scimago indices, the performance of Iran Occupational Health Journal has shown an improving trend over the studied years. The priorities of published subjects in the Journal are in agreement with the research priorities for occupational health in Iran. Thus, the Journal’s continuous improvement regarding examined criteria is highly expected.

Background and aims: One of the most common accidents that annoy many people in the world every year is road traffic accidents. Today, the largest share of accidents related to traffic accidents. Iran is one of the countries with the highest incidence and mortality due to road accidents and traffic. Survey of these events can identify the main factors, prioritization and preventive programs for them. Methods: In this research, the multi-criteria decision-making method based on FUZZY TOPSIS has been used to selection the main risk factors. Five criteria specific, measurable, achievable, realistic and timeable are used for prioritizing of traffic police risk factors. Results: In this research, fuzzy multi-criteria decision-making method has been used to selection the most important risk factors. Five criteria include: specific, measureable, Attainable, Realistic, and time frame were used for ranking risk factors in traffic police. According to the results, the humanchr('39')s behavior was identified as the most appropriate factors for road safety (coefficients = 0.204684). Safety equipment and vehiclechr('39')s usage were ranked in grade 3 and 4. Other indicators of risk in order of importance and influence were at lower levels. Conclusion: Identify and Priority of traffic risk factors would help to managers and policy makers for managing the factors affecting accidents. Humanchr('39')s behavior and humanchr('39')s decision were identified as main role in road accident control.

Background and aims: Accidents happened as a result of LPG leakage emphasizes the importance of the consequence analysis of fire and explosion in LPG storage tanks. The purpose of this study is to analysis the consequences of fire and explosion in a cylindrical LPG storage tank in an oil and gas industry. Method: In this analytical study, four possible failure scenarios including 1) rupture in the cylindrical LPG tank 2) leakage from the loading line 3) leakage from the tank manhole and 4) undesirable opening of the safety valve, and their fire and explosion consequences were simulated by PHAST software. Then the results were compared with existing standards Results: The scenario of tank rupture leads to a radiation flux 37.5 kw/m2 affect a radius of 290 m from tank location that can cause major life and property losses. As the result of a flash fire due to the tanker rupture, there is a possibility of life-threatening to a radius of 520 m. An explosion (resulting from the tank rupture) with blast wave of 0.2 bar affect a radius of 2092 m that can cause the life and property losses. The scenario of leakage from the tank manhole leads to jet fire, explosion and flash fire. Also, the jet fire and flash fire will follow by the scenarios of leakage from the loading and undesirable opening of the safety valve. Conclusion: With attention to severity the tank rupture and the likelihood of occurrence of the domino effect, it is recommended to substitute the horizontal cylindrical LPG tanks by the spherical ones. Also, an emergency response plan should be established based on the result of this study. Keywords: Consequence Analysis, Fire, Explosion, LPG Tank, PHAST

Background and aims: Hospital personnel are exposed to various occupational hazards because of their job circumstances. The aim of this study is to investigate the ergonomic problems of hospital from the perspective of human-system interface technology and to recommend the strategies for improvement. Methods: In this qualitative study, the conceptual framework of hospital ergonomic problems was extracted through the literature review from the perspective of human-system interface technology. Eighteen staffs and experts were participated in the semi-structured interview and focus group discussion according to the conceptual framework. Theme analysis was used to extract the ergonomic problems and their corresponding solutions. Results: In total, 14 ergonomic problems were categorized based on a human-system interface framework. Their corresponding solutions were extracted based on the hierarchy of controls, including elimination and substitution, engineering controls, administrative controls and PPE. Conclusion: Some of the ergonomic problems related to working posture, shift work, workload, job satisfaction and personal relationships are more important problems. The control framework extracted from this study can be used to reduce the ergonomic problems and to recommend the strategies for improvement.

Background and aims: Prioritizing research fields prevents wastage of budgets and increase efficacy of research. Paying attention to health of employees and workers is necessary for promoting health and sustainable development in the country. Therefore this study was conducted in order to determine the research priorities in the field of occupational health in Iran. Methods: In order to determine the research priorities in the field of occupational health the COHRED model was used. Data collection was done by review of literature, obtaining the views of experts (by interview and Delphi technique) and collecting statistics from relevant officials. Priority setting was done in two stages and based on Delphi technique. In this research out of 70 identified research centers, 22 participated in the study. Descriptive statistics including mean (SD) and frequency (percentage) was used to analysis the data. Results: Results of this study showed that musculoskeletal disorders and injuries had the highest research priority in Iran. The occupation of workers in mine and industries had the highest research priority. Also three indicators of equity in service provision, work security and healthy life style had the highest research priority among the social determinants of health for workers. Conclusion: In summary in this research it was attempted that research priorities be defined in different areas of research which can be used as a tool for decision makers in distribution of resources in the field of occupational health.

Background and aims: Usability is the extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use. Increased public awareness of the usability issues has caused that usability plays an important role in production. Brooke’s SUS is one of the most used tool for measuring usability. Yet, the Persian translation of this tool has not been available to Iranian researchers, and therefore this study has been conducted in order to provide the Persian translation of it and measure its psychometric validation in assessing usability of traffic signs. Methods: Modified version of SUS by Annie(2011) was translated using Backward-Forward method of translation. For measuring validity of the questionnaire the opinions of 10 experts in related field were used. Content Validity Ratio (CVR) was measured based on Lawshi method and Content Validity Index (CVI) was measured based on Waltz and Basel method. The questionnaire content validity index was also calculated.There is 10 items in SUS for assessing usability of each traffic sign, therefore for assessing usability of 20 selected traffic signs, a 200 items questionnaire was developed. Questionnaires were distributed among 50 staff of Iran University of Medical Sciences. Cronbach’s α was used was used to measure the reliability of the questionnaire. Stability of questionnaire was calculated by using test – retest and intra-cluster correlation index. Results: All the items in SUS showed a high level of CVR and all items were accepted. CVI of all items were above the acceptable level of 0.79 . Content validity index was equal to 0.927. Cronbach’s α was equal to 0.965, and inter-cluster correlation index was equal to 0.993. Conclusions: The Persian version of SUS is a reliable tool for measuring usability level and showed a high level of validity and reliability and can be used for future researches in the field of usability.

Background and aims: Street sweepers, due to exposure to medical waste, are a high risk group for infections such as HIV and Hepatitis. Regarding to importance of behavior role to decreasing morbidity in this category of disease and recognizing effective factors of performing safe behavior in this group, the present study aimed to predict the occupational behavior lead to prevention of infection based on the framework of the health belief model constructs in street sweepers who are working in district ninth, Tehran municipality in 2011. Methods: In this descriptive-analytical study, a convenience sample included 162 sweepers were surveyed and filled out designed questionnaires (based on health belief model constructs and occupational behavior lead to prevention of infection). Statistical analysis of data was performed with SPSS software, Chi-square, Pearson correlation, One-Way ANOVA and Regression analysis tests. Results: The findings showed that perceived barriers and perceived severity can predict 55% of the variations in occupational behavior lead to prevention of infection of street sweepers. Conclusion: In designing interventions (education) based on the health belief model, should be more emphasis on perceived severity and barriers constructs.

Background and Aims : Many systems and processes can cause the introduction of radioactivity into the environment. Human activities in nuclear industry such as nuclear fuel cycle and reactor operation, lead to a significant production and release of radioactivity to the environment. Understanding the physical and chemical nature, including size, chemical composition and radioactivity of aerosol particles in the safety chamber of Tehran research reactor is indispensable for evaluation of exposure level and methods of prevention. The aim of this study was to measure the size distribution of aerosols and their activities, which was determined using an Anderson cascade Impactor (ACI) ACFM model and liquid scintillation respectively. The measurements were performed in three workstations in the safety chamber of Tehran research reactor. Methods: The identification of existing radio nuclides on suspended particles were carried out in the safety chamber by means of environmental sampler and mass size distribution of particles was measured using an Anderson cascade Impactor (ACI). To determine the type and amount of radio nuclides in the aerosol particles the γ-ray spectrometry with a high –purity germanium (HPGe) detector and ultra-low level liquid scintillation spectrometer were used respectively. Results : The results showed that the activities median aerodynamic diameter (AMAD) value for three selected workstations were 2.4, 3.1 and 3µm with geometric standard deviation of 2.3, 2.12 and 2 respectively. Furthermore, the results of particle activity size distribution showed that the most fraction of activity was related to nucleation and accumulation mode, especially particles with the aerodynamic diameter less than 0.4µm. Conclusion: The most activity was related to the number of particles in the accumulation and nucleation mode (fine particles). The origin of these particles can be the coagulation of particles in the nucleation mode. The accumulation mode also contains droplets formed by the chemical conversion of gases to vapors that condense.

Background and aims: Speeding and deviation to the left and right are the most notable and important causes of injuries that caused by traffic accidents in most countries. Injuries caused by these events are so great that it will be remembered as a war on the road. Due to the importance of the relation between aggression, errors and violations, this study aimed to investigate the relationship of aggressive driving and the average of driving speed and lane deviations. Methods: in the present study, 75 taxi drivers completed the Spielberger State-Trait Anger Inventory. Assessing the dimensions of aggression performed by car driving simulator. Using SPSS (V:22) ,descriptive tables and Spearman correlation coefficient data were analyzed. Results: The findings showed that there was a significant direct relation between all aspects of aggression and the average and maximum of speeding and lane deviations, So that aggressive drivers drove with high speeds and were more willing to shift to the left and right. Conclusion: Aggression is considered as one of the important factor affecting to increase the average speed and lane deviations.