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대황(大黃)이 뇌허혈 유발 노령(老齡) 흰쥐의 해마 c-fos 및 c-jun 발현에 미치는 영향
김주원,정승현,신길조,이원철,백진원,Kim, Ju-Won,Jeong, Sung-Hyun,Shin, Gil-Cho,Lee, Won-Chul,Paik, Jin-Won 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.3
Objective : In this study old BCAO rats were observed for effects of 'Dea-Hwang' on brain ischema injury, because risk of stroke increases with age. Method : The brain ischema injury was induced by temporarily closing carotids on both sides in a low blood pressuer state and Dea-Hwang was administered orally to 18 month-old BCAO rats. Results and Conclusions : The ischemically damaged Hippocampus and c-fos and c-jun expression were analyzed by immunohistochemical staining and results are summarized as follows: 1. The c-fos expression after inducing a brain ischema injury in the hippocampus was more inhibited in the dosed group than in the control group. 2. The normalized optical density of c-fos expression was more reduced in the CA1, CA2, and DG areas of the dosed group than in those of the control group. 3. The c-jun expression after inducing brain ischema injury in the hippocampus was more inhibited in the dosed group than in the control group. 4. The normalized optical density of c-jun expression was more reduced in the CAI area of the dosed group than in that of the control group.
한ㆍ중 비즈니스 관계의 갈등과 그 해결방안에 대한 모색
김주원(Ju Won KIM),김용준(Yong June KIM) 한국무역상무학회 2015 貿易商務硏究 Vol.66 No.-
This research is, first of all, a theoretical study concerning 'conflict.' Only then, we could obtain ways in which we manage and resolve various problems arising fromconflicts in business between Korean and Chinese companies. In doing this, we also tried to grasp cultural characteristics, or factors, in Chinese ways of carrying out negotiations that lead to conflicts with us. On the basis of these preliminary considerations, we developed practical techniques of conflict management and types of negotiation strategy. We thereby could suggest broader strategic implications for better performance in international business. Concretely, this research investigates techniques of conflict management and types of negotiation strategy. For such techniques and types, we suggest, (1) Sharing technique or reconciliatory compromising negotiation and its compromise strategy, (2) collaborative technique or cooperative negotiation and its win-win strategy, (3) competitive technique or competitive negotiation and its profit-seeking attack strategy, (4) accommodative technique or receptive negotiation and its relation-maintaining yield strategy,(5) avoidant technique or evasive negotiation and its indifference-showing avoidance strategy. This research contributes to promote understanding on negotiation culture of chinese corporate. and we provide the guideline of the conflict management and the insight for the efficiency strategy of chinese business negotiation. But, empirical data and statistical examinations should be added to our present research for the future prospective ones.
극세관 헬리컬 코일 증발관내 R-22의 열전달 및 압력손실 특성
김주원,김정훈,서석기,김정훈,김종수,Kim, Ju-Won,Kim, Jeong-Hun,Seo, Seok-Ki,Kim, Jeung-Hoon,Kim, Jong-Soo 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.5
To make compact evaporator, experiments that show characteristics of evaporating heat transfer and pressure drop in the helically coiled small diameter tube were taken in this research. The experiments were performed with HCFC-22 in the helically coiled small diameter tube; inner diameter=1.0(mm), tube length=2.0(m), and curvature diameter=31, 34, 46.2(mm). The experiments were also carried out with the following test conditions; saturation pressure=0.588(MPa), mass velocity=$150{\sim}500(kg/m^2s)$, and heat flux=$1{\sim}5(kW/m^2)$. The experiment results are that the empirical correlation to predict heat transfer coefficient for single phase flow in helically coiled small diameter tube was obtained. It was found that dry-out is occurred at low-quality region for evaporation heat transfer because of breaking of annular liquid film. The friction factor of single phase flow of helically coiled tube was agreed with Prandtl's correlation. Finally, It was proposed for correlation that can precisely predict the friction factor of two phase flow of helically coiled tube.
김주원,유병준,박세환,박승희,Kim, Ju-Won,Yu, Byoungjoon,Park, Sehwan,Park, Seunghee 한국방재안전학회 2018 한국방재안전학회 논문집 Vol.11 No.2
본 연구에서는 강판에 발생한 국부적인 손상의 진단을 위해 강자성의 연속체 구조물에 적합한 비파괴진단 기법인 누설자속 기법을 적용하였다. 강판시편의 두께 변화에 따른 누설자속 기반 진단 기법의 민감도를 분석하기 위해 각각 다른 두께를 가지는 몇 가지의 강판시편을 준비하였고, 각각의 시편에 3가지 깊이의 인공결함을 가공하였다. 홀센서와 자화요크를 이용하여 일정한 자화밀도를 가지는 누설자속 센서헤드를 제작하여 강판시편으로부터 누설자속 신호를 계측하였다. 센서헤드로부터 수집된 자속신호의 품질향상을 위해 일련의 신호처리 과정을 거쳤으며, 각 손상지점으로부터 계측된 누설자속 신호의 확인을 통해 국부손상 감지의 가능성을 확인하였다. 강판두께에 따른 누설자속 기법의 손상감지 민감도의 분석을 위해 각각 다른 두께의 강판시편으로부터 검출된 MFL 신호에서 P-P value를 정량적으로 추출하였고 그 값을 비교 분석 하였다. To diagnosis the local damages of the steel plates, magnetic flux leakage (MFL) method that is known as a adaptable non-destructive evaluation (NDE) method for continuum ferromagnetic members was applied in this study. To analysis the sensitivity according to thickness of steel plate in MFL method based damage diagnosis, several steel plate specimens that have different thickness were prepared and three depths of artificial damage were formed to the each specimens. To measured the MFL signals, a MFL sensor head that have a constant magnetization intensity were fabricated using a hall sensor and a magnetization yoke using permanent magnets. The magnetic flux signals obtained by using MFL sensor head were improved through a series of signal processing methods. The capability of local damage detection was verified from the measured MFL signals from each damage points. And, the peak to peak values (P-P value) extracted from the detected MFL signals from each thickness specimen were compared each other to analysis the MFL based local damage detection sensitivity according to the thickness of steel plate.