Received: November 2016, Accepted : February 2017 Background: The use of chemicals is essential in education resulting in exposure to these pollutant in a variety of chemical and research laboratories. Chemical contaminants in chemical laboratories are in different forms and chemical exposure risk assessment is important for choosing appropriate controls in protecting the health of operators, experts and students. For risk assessment in chemical exposures, several techniques were introduced that their use should be assessed. This research was done with the aim to introduce the most appropriate technique in chemical risk assessment by using three chemical risk assessment techniques. Materials and Methods: This was a descriptive research done in one chemical laboratory. This research had been defined in several stages: in the first phase, the list of solid and liquid chemicals were prepared and full physicochemical properties of substances as well as toxicity and health risk of them were collected. Finally Chemical Risk Management Self-Assessment Model (Chem-SAM), University Of Wollingong (UOW) risk assessment and semi-quantitative risk assessment method (SQRA) methods were used and compared. Results: There was significant difference between SQRA methods and UOW technique while no significant difference was observed between SQRA methods and Chem-SAM model. Conclusions: All three techniques are simple, but the results were similar in SQRA methods and Chem-SAM model, so these two methods can be replaced in chemical risk assessment. In order to control the identified risks, this research has recommended programs, control measures, improving local exhaust ventilation systems, personal protective equipment and training of personnel.
Introduction: Risk-based inspection is a powerful tool provided by the American Petroleum Institute in order to respond to the needs of the process industries. The main focus of this method is on inspection, integrity management, maintenance, as well as reduction of the probability of failure. The purpose of this study was to conduct the risk-based inspection technique and critical success factors in its implementation to improve risk and process safety based management systems.
Methods: In this review study, we first listed the keywords based on the research title including Critical Success Factors, risk assessment, process safety, corrosion management, inspection Plan, failure mechanism, Risk Based Inspection, Risk Based Maintenance, Risk-based Integrity Management, and Asset Integrity Management. Later, each term was searched specifically and without time limit in the internal and external databases of Science Direct, PubMed, Google Scholar, SID, Google Search, Magiran, Civilica, and Scopus.
Result: A systematic review of various studies showed that critical success factors provided the necessary context for the implementation of a risk-based inspection process in the process industries and were essential factors for the effective implementation of the RBI method.
Conclusion: By analyzing the results of the studies we found that identifying CSFs can improve the effective implementation of RBI in industries and guarantee the benefits mentioned for this method. Moreover, the engineering and accurate implementation of risk-based inspection method will lead to the best implementation of management systems based on the risk and process safety and its improvement.
Background and Objectives: Thermal sensation is not a direct sense of air temperature but is related to people's feelings, sensory experience and psychological phenomenon, which can affect their performance, productivity, attitude and sense of satisfaction. The aim of this study was to determine the subjective thermal sensation and its relationship with stress, anxiety, depression and students' cognitive function.Methods: This study was descriptive-analytical and was performed on 167 male students of Isfahan University of Medical Sciences. Students' subjective thermal sensation was measured on a seven-point scale and ambient temperature and humidity were measured in each student's room. The DASS-42 questionnaire was used to measure stress and anxiety and the "Reaction Timer" device was used to measure the cognitive function. The collected data were analyzed by SPSS software version 20.Results: Students' stress, anxiety and depression were 40%, 47.3% and 41.3%, respectively. The mean temperature of the dormitory was 20.326°C, the mean relative humidity was 56.78% and the subjective thermal sensation of 29.9% of the students were neutral from the ambient temperature. There was a significant relationship between students' subjective thermal sensation and stress, anxiety and mean diagnostic reaction time, color selection, sound selection, number of errors in the diagnostic section and sound selection.
Conclusion:Students' subjective sensation of ambient temperature was obtained as a very important and influential factor because in addition to affecting stress and anxiety, it also had a significant effect on their time of diagnostic reaction and selective.
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