فهرست مطالب

  • Volume:10 Issue:3, 2019
  • تاریخ انتشار: 1398/08/17
  • تعداد عناوین: 8
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  • Interventional Role of Training in Promotion of Health, Safety and Environment Culture in Wood Industries
    Ghazale Monazami Tehrani, Mousa Jabbari, Fatemeh Bakhshi Mohammadi, Hasti Borgheipour Page 341

    In order to prevent accidents and occupational diseases in workplaces, it is necessary to ensure the control of risks. Training has always been the fundamental pillar of health safety and environment management systems. This study was carried out to find the interventional role of training in the promotion of HSE culture in wood industries. The Behsazan Wood Industry in Islamshar County, central Iran, was selected as a case study. Initially, two pre-test and post-test sessions were held for the supervisors and workers in the company to assess the level of their HSE culture.  The analysis of the training needs was done in accordance with ISO 10015 after the administration of the specified training programs. The outcomes were analyzed using pre and post-test statistical analysis. Finally, the relationship between training structures and HSE culture was investigated using structural equation modeling (SEM). After codification and implementation of six training courses, the results of the second part showed a significant difference in the three sub-factors, including "HSE awareness and attitude"," staff capability", and "HSE reporting". The noticeable changes in the sub-factors of "HSE awareness and attitude", as the most valuable result of this study, obviously indicated that the training programs were tailored and conducted to the training needs of the organization. Thus, improving learning outcomes in all domains (cognitive, affective, and psychomotor) for planning promotion programs can be more effective in this industry.

  • Hazard Identification in Steam Boilers (Case Study: Farabi Hospital)
    Mohammad Baratchi* Page 343

    Steam boiler is a closed system uses fuel to produce steam and is a commonly used primary utility in industries. The system poses many health, safety, and environmental hazards, which is the main reason for the need to correctly identify hazards in this unit. In this study, two methods were used to identify the most important hazards in the steam boiler. All hazards categorized and scored by HAZID (Hazard Identification method) checklists, and then, prioritized using ANP (Analytical Network Process) method. The risk assessment team, in this study, found 58 hazards in 4 categories, from which 6 hazards were weighted by Super Decision software. Accordingly, job stress (with the weight of 0.27) and cooling system aspect (with the weight of 0.09) were recognized as the most important and the least important hazards, respectively. This study achieved accurate hazard ranking in an important utility for dealing with changes at any time and showed the importance of considering all aspects in hazard identification of steam boilers in different industries.

  • Contribution of Driving Anger and Aggression in the Prediction of Driving Behavior
    Ehsan Asivandzadeh, Ali Asghar Farshad, Zeynab Jamalizadeh, Iraj Alimohammadi, Jamileh Abolghasemi Page 352

    Traffic violations and aggression are often regarded as social phenomena with important social and economic consequences. The present study investigated the potential contribution of demographic variables, driving anger and aggression on predicting aggressive driving behavior. The sample population consisted of 168 male drivers with an age range of 19–30 years old and the average driving experience of 9 years. All participants filled out the self-reported scales that assess driving anger, aggression dimension, and driving behaviors. Based on the participants' responses to the trait-anger dimensions in Spielberger State-Trait Anxiety Inventory, they were re-categorized in three driving anger categories of high-trait-anger, medium-trait-anger, and low-trait-anger. All of the participants had a driving certificate. The main results of this research indicate that: (1) for almost all variables, the effect of anger was significant; (2) anger situation had a contribution in the prediction of lapse, errors, and violations; (3) demographic variables, driving anger, and aggression were all involved in predicting driving behavior in a complementary manner; and (4) aggression was the best predictor of violations. Future research is recommended to continue to investigate the effect of various environmental, social, psychological, and personality factors on risky driving behaviors in order to identify treatment and prevention strategies for this societal concern.

  • Dynamic Analysis of the Consequences of Gas Release in Process Industries Using Event Tree Technique and Bayesian Network
    Iraj Mohammadfam* Page 353

    In process industries, storage tanks play an important role in the storage of a wide range of chemicals, compressed gas and other hydrocarbons. Gas release from these tanks can lead to catastrophic events with huge financial, human, and environmental consequences. In this study, a compressed gas tank was chosen as the unit of case study. Gas release as the top event was taken into consideration for quantitative and qualitative analysis of the probable consequences using the Event Tree Analysis and Bayesian network model. Analyzing the consequences of gas release from the tank by Event Tree Analysis (ETA), 6 safety barriers were detected to prevent the top event. The success and failure of these barriers could lead to 10 final consequences. Among the identified consequences, “near misses” were known to be the most probable consequence. The results of the study showed that safety barriers could significantly reduce the consequences of the occurrence of the top event. Bayesian networks can fix the static problem of quantitative risk analysis and provide the capability to determine the most probable consequences of the top event.

  • Quality of Nursing Work Life, Work-family Conflict, and Self-regulation: Structural Equation Modeling
    Isaac Rahimian Boogar, Siavash Talepasand, Behnam Barati Mashhadi Page 368

    The quality of nursing work life is an important index for assessing the professional health of nurses and providing tailored care services to patients. The aim of the present study was to find out the role of work-family conflict and self-regulation in predicting the quality of work life among nurses. In this retrospective cross-sectional study, a total number of 230 nurses were randomly selected from public and private hospitals. They were asked to fill out Work-related Quality of Life Scale-2, Work–Family Conflict Scale, and Self-Regulation Questionnaire. Moreover, the structural equation modeling was used to analyze the data by SPSS-19 and LISREL-8.80 software. The results showed that the model had a good fit to the observed data (RMSEA=0.06, GFI=0.93, AGFI=0.87, NFI=93, CFI=95, IFI=95, and P-value=.073) and the final model was verified. Behavior-based and time-based work-family conflicts , assessing the plan’s effectiveness, searching for options, and implementing the plan could significantly predict stress at work, general well-being, working conditions, employees’ engagement, job career satisfaction, and work-home interference (p<0.05). In conclusion, it is indispensable to design the tailored programs and professional health plans to improve family-work interference and self-regulatory actions, as leading causes for the quality of nursing work life.

  • Hazard Identification and Consequence Analysis of Possible Events in the Tank Farm and Flare Area of ILAM Gas Refinery by ETBA and PHAST Software
    Seyed Rohollah Sharifi, Fatemeh Razavian Page 370

    Products of Ilam Gas Refinery include natural gas, ethane, C3 +, C5 +, and sulfur. The site of this refinery is located in the west of Iran. In this study, Energy Trace and Barrier Analysis (ETBA) method s was used to examine the risks of the reservoir area and flares of the refinery. A total number of 70 risks were identified, among which, 8 risks were within the unacceptable range. The outcome of the identified risks for the selected scenarios included radiation-induced fire, pressure-induced explosion, and infusion of  toxins. The Process Hazard Analysis Software Tool (PHAST) was used to model the probable events under the four scenarios, including sudden release of gases from the spherical reservoirs, leaks of gas condensates from the cylindrical reservoirs, leaks of Liquefied Petroleum Gas (LPG) from the loading arm, and turning off the flares. The results showed that in the first scenario, the dangers resulted from the fire and explosion of the spherical reservoirs will affect a wide surface area of the refinery. In the second scenario, during the leaks of gas condensate, the peripheral wall of the cylindrical reservoirs would be of utmost importance. In the event of the third scenario, the location of the loading area would not be appropriate.  In the fourth scenario, since the height of the burners is high enough, , there would be no serious damage on the nearby  facilities and individuals in case of releasing toxic and flammable gases. Reassessing the fire-extinguishing systems, constant monitoring of the lightning rods, and performing firefighting maneuvers are among the preventive measures recommended in this study.

  • Fumed Silica Particle Deagglomeration Associated with Instrument Techniques
    Candace Su, Jung Tsai, Jared Khattak, Nara Shin, Wendell Rhine, George Gould Page 379

    Fumed silica is used in insulation products because of its thixotropic properties and low thermal conductivity. Exposures to crystalline silica are of most concern, but there is evidence that exposures to nanometer sized fumed silica may also lead to adverse health outcomes. Direct reading real time instruments are used to assess concentrations of airborne particles, they often contain an aerosol pre-separator-cyclone, which may cause measurement variation by dispersing agglomerated particles. The cyclone effect was determined by evaluating three instruments measuring airborne fumed silica as a case study. This result indicated that the measured nanoparticle concentrations of fumed silica increased with cyclone use, thus correction should be made for measuring fumed silica using cyclone attached instrument.

  • Relationship between Work Ability Index and Fatigue among Iranian Critical Care Nurses
    Ehsan Garosi, Sharif Najafi, Adel Mazloumi, Mojtabd Danesh, Zohreh Abedi Page 395
    Background

    Nurses have always been considered as a unique working group because of the physically and mentally demanding tasks they bear at work. Such a working condition exposes them to a high risk of fatigue, which could influence their work ability. Therefore, this study aims to investigate the relationship between work ability index (WAI) and fatigue of critical care nurses in a military hospital.

    Methods

    In this descriptive and cross-sectional study, 101 nurses (71 females, 30 males) of critical care units filled out both the Persian version of WAI and nurses fatigue questionnaires. The nurses were selected from three general hospitals of Tehran by cluster sampling method. The Pearson correlation test was used for investigating the relationship between two quantitative variables, and all the statistical analyses were performed by SPSS v. 21 software.

    Results

    The nurses’ average age was 24.5 years old (±SD=±3.6), and the mean of work experience was 9 years (±SD=±4.13). The mean work ability of the nurses was 40.01 (±SD=±4.05), indicating “good work ability”. Fatigue was found in 46.19% of the participants, and the nurses’ fatigue was mainly of mental type (29.8%). There was a significant negative correlation (-0.57) between the score of WAI and total fatigue (p < 0.001).

    Conclusions

    The negative correlation between WAI and fatigue shows that WAI and fatigue score could be a good predictor of health and quality of work life. Therefore, identifying the influential factors of nurses’ work ability and fatigue would help to improve the work condition of critical care nurses.