http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박윤성,김제신,박병주,유정희,이준희,고병희,이의주,Pak, Yun-Seong,kim, Je-Shin,Park, Byung-Joo,Yoo, Jung-Hee,Lee, Jun-Hee,Koh, Byung-Hee,Lee, Eui-Ju 사상체질의학회 2016 사상체질의학회지 Vol.28 No.2
Objectives The purpose of this study was to develop the Sasangin Diagnostic Questionnaire for Specialist(SDQ_S) and to evaluate the reliability and validity of SDQ_S for standardization of sasang constitutional diagnosis by korean medicine Specialist in clinical practice.Methods SDQ_S was developed through discussions of three sasang constitutional medical specialist. We recruited 210 subjects aged from 20 to 70, and conducted the evaluation of SDQ_S and sasang constitutional diagnosis. For the reliability test, internal consistency was examined by calculating the cronbach's α coefficient on 88 items excepted measurements of trunk, and independence and agreement was examined by chi-square test and McNemar test for 84 subjects which retested SDQ_S. For the validity test, discriminant functions was derived from the sample group(105 subjects), and they were applied to the test group(105 subjects). We identified the hit-ratio of SDQ_S in the test group.Results and Conclusions In the reliability test, the cronbach's α coefficient was 0.664 and 87 items(98.9%) have dependent relationships between 1st test and 2nd test. And 39 items(44.3%) have high agreements(0.8≤McNemar), 26 items(29.5%) have common agreements(0.4≤McNemar<0.8). In the validity test, four discriminant variables(Soeum Index, Taeeum Index, Torso Ratio I, Taeyang Index) were selected, and two discriminant functions were derived. Total hit-ratio was 74.2%, and hit-ratio of Taeeumin(76.7%) was higher than that of Soeumin(75.9%) and Soyangin(69.7%). SDQ_S has good reliability and validity for sasang constitutional diagnosis.
화력발전소 동력전달용 e-PGS 시스템의 이뿌리 굽힘응력
박윤성(Yun-seong Park),권순만(Soon-man Kwon) 대한기계학회 2021 大韓機械學會論文集A Vol.45 No.9
본 논문에서는 거스(girth) 기어용 대형 링 기어 구동을 위한 피니언에 대한 굽힘강도 해석을 수행하였다. 이를 위해 기존 인벌류트 치형 기반 링 기어를 핀 휠로 구성한 e-PGS(external pinwheel gear set) 시스템을 고려하였다. 이의 설계제원 중 롤러직경계수가 증가하면 피니언 이의 크기가 감소하며 그에 따라 이뿌리 부 또한 얇아지므로 굽힘응력은 증가하며, 중심거리증가계수의 증가는 디덴덤의 감소, 그리고 어덴덤과 전 높이에 걸쳐 이 두께가 증가하는 치 형상으로 귀결되며, 접촉력 및 접선력에 미치는 영향은 거의 없음을 확인하였다. 하지만 중심거리증가계수의 증가에 따라 형상계수가 증가하여 이뿌리 부 굽힘응력은 큰 폭으로 감소하는 경향을 확인할 수 있었다. A tooth root bending stress for an external pinwheel gear set (e-PGS) system was considered in this study as a solution to the problem of tooth root breakage in a girth gear system based on an involute tooth profile. The bending strength geometry factor for the e-PGS system was determined by the same procedure as that for the involute tooth profile. The tooth root bending stress of the e-PGS system was noted to be lower than that of the involute teeth with the same design specification. It could also be lowered by increasing the center distance modification coefficient and the number of teeth of the pinion and by decreasing the roller diameter coefficient. Finally, it was confirmed that the e-PGS system could provide a new solution to the bending strength problem of a conventional girth gear system.