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임현교,최재남 한국산업안전학회 1995 한국안전학회지 Vol.10 No.2
Many studies have been done to determine the magnitudes of force a man can exert on the objects. However, very little attention has been paid to those in postures on slopes. This paper was aimed to evalute how human work postures would affect the push/pull force and to grasp the relationships between the rectified EMG(REMG) measured at the trunk muscles and force exerted on upward slopes. Two subjects participated in the experiment. The results showed no linear relationship between the REMG and exerted force at handle. But as the slope and handle height increased, exerted force and muscular stress on erector spinae or rectus abdominis were generally increased. It was notified that since ANOVA did not detect any statistical significance in REMG variation due to dominant muscles, careful application and interpretation of the REMG should be required in analyzing maximal force exertions.
임현교,김해진 한국산업안전학회 2000 한국안전학회지 Vol.15 No.3
The work posture impose additional stress upon human workers so that it should be carefully considered in designing works. However, we have a lot of manufacturing plants which convert their standing workplace to sedentary one. To confirm the validity of that trend, the authors conducted an experimental study, and compared the results. The results of the EMG and the self-cognitive symptoms, in general, showed a correspondent trend that the sedentary work posture was rated more comfortable. At the beginning of the work, complaint of the lowerback was higher whereas that of the lower leg and the feet went higher as the time elapsed. If the weight of workpiece were heavier than 500g, increasing rate of bodily discomfort in the sedentary posture were greater than that of the standing posture. In the meanwhile, the standing posture was consistently superior to the sedentary posture in its performance. Thus, in conclusion, for a light assembly work, sedentary work posture would be recommendable because bodily discomfort would be larger irrespective of the small increase of performance increase.
임현교,고병인 대한인간공학회 2007 대한인간공학회 학술대회논문집 Vol.- No.-
This study was performed to establish reasonable criteria for the requirement of finger function characteristics of the Aged. Based on the result of the study, the ratios of the reduction of finger functions in male the aged were more remarkable than those in female. In grips, whereas male the aged exerted 54% of the function of the males in their 20's and 61% of the males in their 40's, female old persons exerted 63% of the function of each of the females in their 20's and 40's and this tendency was similar in grasping power, back strength or torque. In the patterns of muscular strength exertion too, old persons showed the characteristics of muscular strength exertion completely different from those of the persons in their 20's or 40's.
화상처리 기법을 응용한 동력 프레스 작업의 근원적 안전확보
임현교 한국산업안전학회 1996 한국안전학회지 Vol.11 No.1
In spite of a tendency automatizing manaufacturing processes, since power presses are highly repetitive at high speeds, they have still been using to a large extent in many industries. More often than not, press workers have to make decisions whether work materials are located well or not, they should rearrange them or not, and their bodies would be safe or not. If the decision would be wrong, of course, they cause severe damages to human workers so that many workers haven't been willing to work with them. However, with the help of computer technologies, it would be possible to aid the press workers' decisions, and to allow or prohibit them from inserting their hands between slide rams and dies. Thus, this research was aimed to evaluate and analyze possibilities of applying Image Processing Techniques for prevention of press accidents. Through a series of procedures including Capturing work sites and material, Image Enhancement, Contouring, and Edge Finding, work characteristics were obtained and analyzed. The results showed that there were somewhat differences in image characteristics between accident-induced work scenes and accident-free ones. Consequently, if the image analyses are well carried out in real time, they would give a successful help to human press workers.
상기도 폐쇄후 발생한 긴장성 기흉 및 급성 폐부종 1예
임현교,윤경봉,김중호 대한마취과학회 1992 Korean Journal of Anesthesiology Vol.25 No.4
20개월 된 여자환아에서 이마의 반흔 교정을 위해 기관내 삽관올을 한 뒤 마취 유지를 하던중 후두경련양의 상기도 폐쇄가 두차례 와서 양압환기를 시행하였으며, 폐쇄의 소실과 동시에 과다한 압력이 폐포에 전달됨으로써 기흉, 피하기종, 중격동 기종의 발생하였고, 후두경련이 소실되면서 비심장성 폐부종이 나타난 예를 경험하였기에 문헌적 고찰과 함께 보고하는 바이다. Pneumothorax and pulmomary edema can be produced as a complication during general anesthesia. The former which occurs during pressure ventilation is highly dangerous. It is characterized by a dramatic onset which is readily recongnized and demands immediate management. The latter may be developed after the upper airway obstruction has been relived due to the reduction of the intersitial hydrostatic pressure and increased capillary permeability. We experienced a case of pneumothorax and pulmonary edema that occurred after treatment for upper airway obstruction.