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도사자(?絲子)가 RANKL 유도 파골세포(破骨細胞)에 미치는 영향
김준연,황귀서,Kim, Joon-Yeon,Hwang, Gwi-Seo 대한예방한의학회 2010 대한예방한의학회지 Vol.14 No.2
Objectives : This study was performed to evaluate the effect of CJ(Cuscuta japonica Chois) on osteoclast differentiation and gene expression. Methods : The osteoclastogenesis and gene expression were determined in RANKL(receptor activator of nuclear factor kappa B ligand)-stimulated RAW 264.7. The results were summarized as followes. Results : CJ decreased the number of TRAP positive cell in RANKL-stimulated RAW264.7 cell. CJ decreased the expression of RANK(receptor activator of nuclear factor kappa B), $TNF{\alpha}$, and IL-6 in RANKL-stimulated RAW264.7 cell. CJ decreased the expression of iNOS and COX-2 in RANKL-stimulated RAW264.7 cell. CJ decreased the expression of Cathepsin K in RANKL-stimulated RAW264.7 cell. Conclusions : It is concluded that CJ might decrease the bone resorption resulted from decrease of osteoclast differentiation and it's related gene expression.
김준연(Joon-Yeon Kim),김정태(Jeung-Tae Kim) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
NIC@E is software for prediction of various outdoor Noise. The program is based on the ray tracing technique which has been widely used in an environmental noise prediction and analysis. In this paper, we analyze the Railway noise on the various types of geometrical source conditions in 3D and develope the expression method of 3D Graphics for noise level.
친환경 전력기기 개발을 위한 Dry Air 절연파괴특성 연구
김준연(Joon-Yeon Kim),김용한(Yong-Han Kim),석복렬(Bok-Yeol Seok) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Dry air is one of the most promising insulation media for eco-friendly high voltage apparatuses. In this study, the lightning impulse breakdown characteristics of dry air were investigated experimentally to establish the insulation design criteria of DAIS (Dry Air Insulated Switchgear). The dielectric experiments with sphere-to-plane electrode systems were performed in order to analyze the gap discharge characteristics of dry air. The gap length and the pressure of dry air were varied within the range of 15∼35㎜ and 0.1∼0.3㎫, respectively. As a result, the breakdown voltage of dry air at 0.1㎫ was about 10% higher than that of air. And the breakdown voltage of 0.3㎫ dry air was about 2.2 times higher than that of 0.1㎫ dry air. Also, the dielectric strength of epoxy and dry air composite insulation was analyzed with experiments by using the epoxy-molded rod-to-plane electrodes. Through the experiments, it was found that the breakdown voltage was highly dependent on the maximum electric field of dry air gap, regardless of the molded epoxy resin thickness.