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김수용(S Y Kim),진소영(S Y Jin),정순희(S H Jung),유수영(S Y Yoo),강성준(S J Kang),신학재(H.J. Shin) 대한소화기학회 1987 대한소화기학회지 Vol.19 No.1
Ischemic colitis is frequently misdiagnosed as non-specific colitis, ulcerative colitis. The Surgeon may miss the true diagnosis at operation because arterial pulsations frequently are present in the mesenteric vessels, and the normal appearance of the serosa may mask the amount of ischemic damage in the bowel. Colonic ischemia is multifactorial disease complex, presenting as a continum that may range from mucosal edema to gangrene, from completly reversible to irreversible and from no vascular occlusion to complete occlusion. We had a case of ischemic colitis, associated with rectal cancer which was unexpected before operation. The literatures are reviewed here with the case presentation.
EDISON_전산열유체를 활용한 풍력발전기 타워의 후류 불안정성 억제에 관한 수치연구
김수용(S.Y. Kim),진도현(D.H. Jin),이근배(K.B. Lee),김종암(C. Kim) 한국전산유체공학회 2013 한국전산유체공학회지 Vol.18 No.1
The performance of the wind turbine is determined by wind speed and unsteady flow characteristics. Unsteady wake flow causes not only the decline in performance but also structural problems of the wind turbine. In this paper, conceptual designs for the wind turbine tower are conducted to minimize unsteady wake flow. Numerical simulations are performed to inspect the shape effect of the tower. Through the installation of additional structures at the rear of the tower, the creation of Karman vortex is delayed properly and vortex interactions are reduced extremely, which enhance the stability of the wind turbine. From the comparative analysis of lift and drag coefficients for each structure, it is concluded that two streamwise tips with a splitter plate have the most improved aerodynamic characteristics in stabilizing wake flow.