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김광일(Kwangil Kim),김유창(Yuchang Kim) 대한인간공학회 2020 大韓人間工學會誌 Vol.39 No.4
Objective: The purpose of this study is to analyze the differences between male and female by patient, mental disease, age, work period, and industry on the characteristics of work-related mental disease. And the study suggests the preventive measures of work-related mental disease according to the analysis results. Background: Work-related mental disease is caused by depression, job stress, and high job demands. According to statistics of industrial accidents, the number of people diagnosed with work-related mental disease is increasing every year. But the study on the causes and preventions of work-related mental disease hasn"t almost been conducted. Method: Based on statistics of work-related mental disease provided by the Ministry of Employment and Labor, the characteristics of work-related mental disease were analyzed for 195 people. Results: According to analysis, patient of work-related mental disease accounted for 60.3% males and 96.6% females, and mortality of work-related mental disease accounted for 39.7% males and 3.4% females. It was found that work-related mental disease by work period was the highest at 28.2% in "less than 1 year". The work-related mental disease by industry was the highest at 56.3% in the service industry. Conclusion: Based on this study, mental counseling and development of mental health care programs are needed to reduce the patient of work-related mental disease. In addition, suicide prevention programs are needed to reduce mortality of work-related mental disease. Considering the work period, it should be implemented workplace adaptation programs for new employees. Application: These results can contribute to prevention of work-related mental disease. And it can be used as basic data for research on work-related mental disease.
디젤엔진 배기가스 유량 측정용 환상막대형 차압유량계 성능 개선연구
김광일(Kwangil Kim),김민창(Min-Chang Kim),박동선(Dongsun Park),이충훈(Choonghoon Lee) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
An Annular bar type differential pressure flow meter was developed for measuring exhaust gas flow rate of Diesel engine. 3 kinds of annular bar flow meters whose aerodynamic angles are different one another are made and evaluated. The experimental results show that an aerodynamic shape has a effect on the pressure difference between upstream and downstream at the flow meter, that is, the thinner the shape of the annular bar flow meter is, the smaller the pressure difference at the flow meter is. The annular bar flow meter was calibrated both at cold and high temperature gas flow condition. A burner system was designed for raising gas temperature and it was well operated for controlling the gas temperature. An empirical correlation between mass flow rate and differential pressure at the flow meter was obtained and the empirical correlation was corrected by the exhaust gas temperature.