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일부 생산직 근로자의 소음과 사회심리적 요인이 혈압에 미치는 영향
박종구,강명근,차봉석,고상열,장세진,고상백 大韓産業醫學會 1997 대한직업환경의학회지 Vol.9 No.2
This study was conducted to assess the effects of noise exposure and psychosocial factor on blood pressure in manufacturing workers. The study subjects are 414 workers(243 males, 171 females) employed at the noisy department. The mean age of low exposed group(<85dB) was 34.65±9.53 years, and that of high exposed group(≥85dB) was 36.37±11.15 years. The difference in mean age was not significant. The mean and distribution of working duration, smoking status, drinking status were not significantly different between two groups. The mean systolic blood pressure of the low exposed group was 120.01±12.06 mmHg, and that of high exposed group was 126.27±13.84mmHg. The mean diastolic blood pressure of the low exposed and the high exposed group were 77.18±10.83 mmHg, and 83.46±11.22mmHg respectively. These differences of blood pressure were statistically significant(p<0.05). The workers in noisy department have significantly less work environmental satisfaction, higher job demand, and higher social support. The mean values of psychosocial distress were higher in the workers of the noisy department, but the difference was not statistically significant. This study was to speculate whether the work environmental satisfaction and social support modify the association between the noise exposure level and the blood pressure. The result showed that work environmental satisfaction could not modify the association between the blood pressure and the noise exposure. Social support at work did not modify the association. Furthermore, we evaluated the high job strain from a combination of ratio of the high job strain group for hypertension in diastolic blood pressure were statistically significant, but not in systolic blood pressure. Hierarchical multiple regression analysis was used to determine whither the independent variables contributed to explaining the blood pressure. After controlling for possible confounders, we found that the noise exposure level was a correlated of the diastolic blood pressure. But no association between the noise exposure level and the systolic blood pressure. No significant result was found for psychosocial factor.
직업적 관현악 연주자의 근골격계 증상 유병률과 관련요인
김성수,박종,류소연,강명근,홍강식 朝鮮大學校 統計硏究所 2007 統計硏究所論文誌 Vol.9 No.1
Objectives: This study was performed to find out the prevalence and factors that are related to the musculoskeletal disorders. Methods:Questionnaire were distributed from September 15th to 30th. 2000 to 156 musicians in two orchestras in Gwangju and Chonnam areas. Results: Considering a symptom prevalence of the musculoskeletal system, 97 (92.4%) string musicians. 17 (56.7%) woodwind musical instruments, and (100.0%) brass musicians have symptoms. The result of stepwise multiple logistic regression analysis. those who stretch before practice have 0.09 times (95% confidence interval : 0.01-0.66) less risk of symptoms than those who do not. Those who practice daily for three hours have 0.08 times (95% confidence interval : 0.01-0.71) less risk of symptoms than those who practice for two hours a day. Those who has stress at work have 2.66 times (95% confidence interval : 1.36-119.83) as many symptoms as those who has little stress. Those who have much stress at work has 64.19 times (95% confidence interval : 6.22-598.73) as many symptoms as those who have little stress at work. Those who answered that they would join the company again have 0.06 times (95% confidence interval : 0.02-0.17) less risk of symptoms than those who answered that they do not want to join the company again. Conclusion: The various factors have an effect on symptoms of the musculoskeletal systems among musicians of professional orchestras. It is considered that job-related factors such as stretching before practice, personal practice hours and satisfaction and stress at work are the related factors of systems.
류소연,윤혜은,김기순,박종,강명근,박계남 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2
Objectives : This study was performed to investigate the drinking status and the related factors with problem drinking in some medical students. Methods : The study subjects were 345 premedical students (freshmen and sophomore) and medical students (sophomore) in a medical school who replied to the self-administered questionnaire survey during March 2002. The questionnaire was composed of general characteristics, drinking status, social value about drinking, health status, satisfaction of life and alcohol use disorders identification test (AUDIT) . Results : The experience rate of drinking was 88.8% in male and 88.3% in female and it was tended to increase with going up the grade. Prevalence of hazardous, dependence, harmful and problem drinking classified by AUDIT score criteria were 66.2%, 3.0%, 7.0% and 5.1% in male and 34.9%, 0.9%, 1.9%, 1.9% in female. In male, the statistically significant related factors to Al JDIT scores were grade, religion, maternal drinking status, social value about drinking, affectionate feelings of those around one and satisfaction of life. Only social value about drinking was statistically significant correlated factor with AUDIT scores in female. As a result of multiple regression analysis, the related factors with AUDIT scores were sex, maternal drinking status, satisfaction of life and social value a bout drinking. Conclusion : The experience rate of drinking in medical students was higher than that in other college students. Grade, family drinking history, negative psychological feelings, social value about drinking were risk factors to problem drinking.
강명근,박종구,장세진,고상백,차봉석 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.1
This study was conducted to understand health status by general characteristic, and to find out relationship between social support and worker's health status. Health status was measured using SF-36(Medical Outcome Study Short Form 36), a 36 item self administered instrument. The finding of this study were as follow; Mean scores of health status by sex were higher in male. The younger worker reported good health on physical functioning and role limitation-physical than did the older worker, but the older worker reported good health on social functioning and mental health. Mean scores of health status were higher in high income and white worker. When the relationship between social support and health status, social functioning, role limitation-emotion, mental health, vitality, general health were significantly related. Therefore we reviewed the evidence that socio-economic condition are associated with health status in this study, and that the strength of the social support was a important to maintain health.
에너지 회생 방식 스너버 회로를 갖는 3상 GTO PWM 인버터
신병철(Shin-byung chul),강경호(Kang-kyung ho),차재현(Cha-jae hyun),차득근(Cha-duk guen),김명현(Kim-myung hyun) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
This paper is proposed three phase GTO PWM Inverter with energy recovery snubber circuit. The proposed energy recovery snubber circuit is effective in reduction of the power loss in the Inverter system than asymmetry GTO snubber circuit.<br/> <br/>
양정수,두만균,최용어,이규성,강명신 韓國體育大學校附屬 體育科學硏究所 1993 韓國體育大學校附屬 體育科學硏究所論文集 Vol.12 No.1
The purpose of this study is to determine the cardio-pulmonary responses during the submaximal exercise with treadmill running in athletic subjects. This study employed eighteen male judoist as experimental subject who were from Korean National uni-versity of Physical Education 'Seoul' Korea. The results of this experiment were as follows . The cardio-pulmonary responses including heart rate, respiration frequency, tidal, volume, oxygen consumption per ml, per minut, oxygen consumption per kilogram body weight, carbon-dioxide production in fractional concentration and respiratory quotient (RQ) showed to be significantly increased after progressive submaxmal exercise before all-out time with treadmill running in experimental subjects. Statistical relationship of the correlation cofficients among the cardio-pulmonary response factors during submaximal exercise with treadmill running were statistically siginificant, but that of RQ and the other factors were not significant.