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이모산(二母散)이 Guinea Pig의 기관지(氣管支) 평활근(平滑筋)에 미치는 영향(影響)
이춘재,Lee, Choon-Jae 대한한방내과학회 1992 大韓韓方內科學會誌 Vol.13 No.1
This study was carried out to investigate the effect of Yeemosan extract on the contractile force of the isolated guinea pig trachea smooth muscle and elucidate its mechanism. The results were obtained as follows: 1. The contractile response of the trachea smooth muscle of isolated guinea pig to acetylcholine was significantly inhibited by Yeemosan. 2. The contractile response of the trachea smooth muscle of isolated guinea pig pretreated propranolol was significantly inhibited by Yeemosan. 3. Effects of Yeemosan extract on the contractile response of the isolated guineapig trachea smooth muscle pretreated methylene blue was not significant. 4. The contractile response of the trachea smooth muscle of isolated guinea pig to prostaglandin $F2{\alpha)$ was significantly inhibited by Yeemosan. 5. Effects of prostaglandin $F2{\alpha)$ on the contractile response of the isolated guinea pig trachea smooth muscle pretreated Yeemosan was not significant. According to the above results. it was suggested that the contractile response mechanism of the guinea pig trachea smooth muscle to Yeemosan was related to sympathetic nervous system receptor and other mechanism should have further study.
지음(支飮)의 원인(原因)과 증상(症狀)에 대(對)한 문헌적(文獻的) 고찰(考察)
이춘재,신조영,Lee, Choon-Jae,Sin, Jo-Young 대한한방내과학회 1991 大韓韓方內科學會誌 Vol.12 No.2
This study has been carried out to investigate the Cause and Symptom of Ji-Eum ( 支飮 ) by referring to 34 documents. The results were as follow ; 1. Ji-Eum ( 支飮 ) is caused by the Su-Eum ( 水飮 ) storing up thoracic cavity ( 胸中 ), interdiaphragam ( 膈間 ). SimHa ( 心下 ), and stay lung. 2. The symptom of Ji Eum ( 支飮 ) is as follows ; HaeYouk( 咳逆 ), EuySik( 倚息 ), dyspnea( 短氣 ), sleeplessness ( 不得臥 ) edema ( 基形加腫). WhungMan ( 胸滿 ), SimHaChukGey ( 心下築悸 ), GoMoHyun ( 苦冒眩 ), EumSikBulWha ( 飮食不化 ). Pulse HyeonGin ( 弦緊 ). Greasy white coat of tongue.
PSD를 이용한 혼합모드 하중하에서 탄소성 파괴인성평가에 관한 실험적인 연구
김희송,이춘재,Kim, Hei-Song,Lee, Choon-Jae 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.4
In this paper, as elastic-plastic fracture toughness test under mixed mode loading was proposed using a single edge-cracked specimen subjected to bending moment(M), shearing force(F), and twisting moment(T). The J-integral of a crack in the specimen is expressed in the form J=$J_I$+ $J_II$</TEX + $J_III$, where $J_I$, $J_II$ and $J_III$ are the components of mode I, mode II and mode III deformation, respectively. $J_I$, $J_II$ and $J_III$ can be estimated from M-$\theta$ ($\theta$;crack opening angle), F-U(U; crack shear displacement) and T-$\alpha$ ($\alpha$;crack twisting angle). In order to obtain the the M<-$\theta$, F-U and T-$\alpha$ diagram inreal time, a new deformaiton gage for mixed mode loading was proposed using the optical position sensing device(PSD). The elastic-plastic fracture toughness test was carried out with an aluminum alloy. The loading apparatus was designed and manufactured for this experiment. For the loading condition of the crack initatio in the mixed mode, the MMT -3(mode I+ mode II+ mode III) has the lowest values out of the all specimens. This implies that MMT-3 is possible of the crackinitation at lower load, if the specimen acts on together with the torque under the same loading condition. An elastic-plastic fracture toughness test using the PSD brings a successful experimentation in measuring the crack deformation(mode I+ mode II+ mode III).
항공기 복합소재 부품 제조업 종사자의 직무 스트레스 분석
윤훈용(Hoon Yong Yoon),이춘재(Choon?Jae Lee),장준혁(Jun?Hyuk Jang) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.5
The purpose of this study was to investigate the job stress factors of aircraft composite material part manufacturing workers using survey based on 'Job stress factors evaluation tool for Koreans' that was developed by KOSHA in 2003. Two hundred and fifty workers participated in this study, and among them 204 responses were analyzed for this study due to the unreliability and insincerity of responses. The eight job stress factors which are physical environment, job autonomy, job insecurity, organizational system, workplace culture, unfair compensation, relationship conflict, and job requirement were analyzed. The results showed that the stress level of the six job stress factors which are physical environment, job autonomy, job insecurity, organizational system, workplace culture, unfair compensation was relatively higher than that of other industry workers. Generally, all eight job stress factors showed higher stress with temporary workers than with permanent workers, and especially job autonomy, job insecurity, organizational system, and unfair compensation factors showed statistically significant differences (p<0.05). Since the temporary workers are insecure with their job, weak position in organization, having little self-control for the job and lower pay level than that of permanent workers though the job is as same as permanent workers', the stress level of above job stress factors would be much higher than that of the other factors. The group of unsatisfactory with workplace showed higher job stress than group of satisfactory with workplace in all job stress factors, as expected, at the statistically significance level (p<0.05). From the results of this study, the work loss due to the job stress could be prevented, and accurate stress factors could be removed at the workplace. Also the job stress management program can be implemented to improve the work efficiency and the workers' quality of life.