Current Issue

Vol 13 No 3 (2021)
Published: 2021-09-30

Original Article(s)

  • XML | views: 4 | pages: xxx-xxx

    Construction activity is a major driver of gross domestic product (GDP) in a developing country like India. The economic growth of developing countries mainly depends on the extent of construction activity. Notwithstanding its importance in boosting economic growth, a higher level of risk is experienced during execution of construction activities across the globe.  In India construction safety performance is traditionally assessed based on workplace conditions and analyzing accident statistics, there is no provision to consider the safety management systems which affect site safety. The construction industry requires an appropriate mechanism to assess safety practices at project level instead of implementing prevention approaches based on the reactive data. One of the systems useful to measure safety performance is occupational safety and health audit which identify failures within a system and the information gathered assist to determine the best course of corrective action. The present study proposes an integrated approach comprising of Analytic Hierarchy Process and Taguchi loss functions to analyze the safety performance of the construction projects. The weights of safety audit elements are determined by using Analytic Hierarchy Process and the weights are vital in determining the total loss score in Taguchi loss functions for ranking the construction projects basing on safety performance.

  • XML | views: 3 | pages: xxx-xxx

    Introduction: Ports, as the most important part of the maritime transport system, play a high role in world trade. The set of designed and implemented processes in ports can have significant environmental effects. Therefore, the environmental consequences associated with a variety of activities and processes in ports can threaten sustainable global development. So, this study was designed and conducted with the aim of developing a tool to environmental performance evaluation in ports.

    Methods: twenty-five experts in the field of environment and marine sciences had participated in the present study. This study is conducted in three rounds based on Delphi technique in the 2019-2020. index of coefficient of variation (CV) and acceptance criteria for each of the parameters in this study are considered <20% and 4≤, respectively. The validity of this tool has been evaluated using content validity index (CVI) and content validity ratio (CVR) and its reliability has been evaluated with Cronbach's alpha coefficient.

    Results: CV index in the third round of this Delphi was estimated to be 0.08. Therefore, the green ports performance evaluation questionnaire was developed with six factors and 32-parameters after three Delphi rounds. These six factors of environmental performance were included reactive performance (5 parameters), proactive performance (5 parameters), sustainability (5 parameters), socio-cultural (6 parameters), economic (5 parameters) and governance (6 parameters). The results of validity evaluation showed that the CVR and CVI of this developed questionnaire were calculated to be 0.875 and 0.906, respectively. In addition, based on Cronbach's alpha coefficient, the reliability of this tool was estimated, α=0.92.

    Conclusion: The findings indicated that the developed tool for evaluating environmental performance in ports has good validity and reliability. Therefore, the use of this tool can lead to an acceptable estimate of the environmental performance of ports in the maritime transport system.

  • XML | PDF | views: 15 | pages: 190-198

    The human being is the noblest of all the creations by Allah Rabbul-Izzat. Allah gave special commands to humans which made differences over other species, the hygiene practice is one of them. The researches on toilets, defecation, urination and self-cleansing may be supposed as unthinkable subjects in daily discussions, but these topics are important for health and hygiene perspectives. Designers and manufacturers are busy making aesthetically attractive, ergonomically and anthropometrically defined toilet seats. But there is a need for some adjustments in the size and design of modern toilet seats as per the hygiene perspective. This paper presents a conceptual design framework aimed, increasing the level of hygiene and introduced the three-dimensional designs of sitting and squatting types of toilet seats with some amendments as compared to modern designs, concerning hygiene perspective. The present conceptual design of toilet seats can become the integration of human hygiene practice.  In this study, Solidworks Designing Software was used for three-dimensional designs. This framework study dedicates to Iranian society.

  • XML | PDF | pages: 199-207

    It is necessary for managers in all types of organizations to take an appropriate training approach in order to maintain and promote health, achieve safety, and prevent environmental damages. We aimed to evaluate the effectiveness of Health Safety and Environment training workshops from the students’ point of view to inform the relevant officials about the participants’ opinions and make efficient decisions in order to improve the quality of training courses in the field of health, safety, and environment. A qualitative study was conducted using face-to-face or telephone interviews with a purposeful number of 37 students studying at the faculty of the health of Qazvin University of Medical Sciences. To analyze data, thematic analysis using a framework approach was applied. Findings related to the students’ viewpoint about the effectiveness of the HSE workshop were presented in six main themes including satisfaction with the educational content, awareness about HSE concepts before the workshop, the importance of HSE subject in the participants’ field of study, important topics presented in the workshop, experience from HSE workshop, major workshop problems, and solutions. Based on the study results, one of the key objectives of all medical universities should be training their students about health and safety matters to potentially prepare them for future job positions with maximum safe behaviors in workplaces. In fact, medical universities play a key role in developing the health and safety knowledge of students helping them in protecting themselves while working in hazardous working conditions.

  • XML | PDF | views: 2 | pages: 208-217

    The prevalence of fire in laboratories is high due to the potential sources of the fire hazards, including the use of various equipment and chemicals, as well as the possibility of human error. Accordingly, this study was designed and conducted with the aim of developing a tool to identify hazards and assess laboratory fire risk. In the present study, we used the Delphi technique in three rounds in 2020 with the participation of 17 experts in the fields of safety engineering, occupational health engineering, chemistry, and chemical engineering. The scattering index of coefficient of variation (CV) was higher than 20% and the acceptance criterion for each item was considered with an average of ≥4. In addition, the validity and reliability of this tool were evaluated using content validity ratio (CVR), content validity index (CVI), and Cronbach's alpha reliability index. After three rounds of Delphi study, the hazard identification and risk assessment questionnaire for laboratory fire were developed with 45 items, including chemical materials and compounds, electricity, and fire response. The coefficient of variation (CV) in this Delphi study was equal to 0.05. The results of the validity and reliability evaluation of this tool showed that the content validity index (CVI) and Cronbach's alpha coefficient were equal to 0.902 and 0.88. The questionnaire of the present study indicated an acceptable validity and reliability for identifying hazards and assessing laboratory fire risk. Therefore, this tool provided a quick, easy, and practical way to identify hazards and assess the risk of laboratory fires.

  • XML | PDF | views: 4 | pages: 218-231

    The jarless cyclone calibration method is an appealing approach because it removes the need for calibration adapters and eliminates potential sources of error that result from poor or inconsistent seals in calibration adapters or calibration jar lids. The aim of this study was to perform a detailed review of the jarless calibration method by (1) examining the rationale behind the initial pressure drop range specified by the method and (2) evaluating the accuracy of the method in contrast to flow rate measurements in a well-controlled, jar protocol. Four types of respirable cyclones and two filter brands with samples from three separate production lots were considered as components of the sampling trains under consideration. Volumetric flow rate and pressure drop were measured under controlled conditions in a cylindrical jar designed for these determinations. The initial challenge pressure range evaluated in this study was modified based on cyclone type. The measured pressure drop fell within the modified range for all configurations considered, indicating the modified ranges were appropriate. The accuracy of the jarless method was then evaluated by comparing measured volumetric flow rates using different calibration methods for various cyclone, filter brand, and filter lot combination. The jarless method provided accurate calibration results utilizing the modified initial pressure drop ranges utilized in this study. Therefore, it is recommended the initial pressure drop range specified by the jarless method be modified to account for differences among cyclone types.

  • XML | PDF | views: 10 | pages: 232-241

    Despite all the positive effects of cell phones on communication, the improper use of these devices may lead to fatigue and many other problems, including academic, physical, and social problems. Among different age groups, students are the most affected due to the importance of cell phones in their educational and communications needs. In this study, we seek to investigate the relationship between improper use of cell phones and fatigue in Iranian medical students. In the present descriptive-analytical and cross-sectional study, 400 students were randomly selected from the Iran University of Medical Sciences by cluster sampling. Data collection tools included demographic information questionnaires, harmful cell phone use (COS), and fatigue (Smets). Data were analyzed using SPSS software version 22 based on the frequency tests, mean, standard deviation, and ANOVA with a significance level of 0.05. The mean age of students was 24.1±5.65. The total population of the study was 56% female and 44%, male. The results revealed that the prevalence of fatigue among students was moderate (56.60%). The status of harmful cell phone use was reported to be moderate (90%). There was a significant relationship between mobile phone use and total fatigue (p=0.029), decreased motivation (p=0.025), and mental fatigue (p = 0.001). Results showed that excessive use of cell phones had an adverse impact on total fatigue, mental fatigue, and motivation. Therefore, it is recommended to design effective interventions to prevent harmful use of cell-phone, student fatigue, and other consequences, including academic failure and reduction of mental health.

  • XML | PDF | views: 42 | pages: 242-251

    The aim of this semi-experimental study based on the pre-post-test method was to discuss the effectiveness of life skills training on assertiveness and work engagement among personnel of Dr. Shariati vocational and rehabilitation center of Tehran. The statistical population consisted of all staff working (18 people) in 2018. Gambriel and Richi (1975) and Selano and Shufili questionnaires (2001) were used to estimate assertiveness and work engagement. The internal coincidence of instruments was 0.88 and 0.95. In total, 60 educational programs were considered as experimental interventions pertaining to life decuple skills (6 hours training for each skill). In order to test the hypothesis, t correlative groups were used. The results showed that experimental intervention influences on the increment of the assertiveness and its subscales (controversial and fundamental) and general work engagement had a negative impact on the attraction and power by interval 95% (p<0/05).

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