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정석후 ( Seok Hu Jeong ),오경용 ( Kyong Yong Oh ),신동수 ( Dong Su Shin ),최성한 ( Shung Han Choi ),정을식 ( Eul Sik Jung ),박진선 ( Jin Sun Park ),나선영 ( Sun Young Na ),성지윤 ( Ji Yoon Sung ),정지용 ( Ji Yong Jung ),김세중 ( S 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.4
Kaposi`s sarcoma (KS) is an unusual multifocal neoplasm of vascular endothelial cell origin. The trunk, arms, head, and neck are the most common sites. It is common in men and has four distinct variants: classic, Africa-endemic, immunosuppressive drug-associated, and acquired immunodeficiency syndromeassociated KS. KS appears to develop immunosuppressed patients, but is uncommon in patients on dialysis. A 79-year-old man on hemodialysis for 2 months presented with pruritus over the entire body and multiple, discrete, variable-sized, dark blue papulonodules (papuloplaques, maculopapules) on the left arm and shoulder. A biopsy specimen form the left arm showed spindle cells with slit-like spaces and extravasated red blood cells. The specimen was positive for CD 34 antigen, and human herpesvirus 8 was detected. We report a case of KS that occurred in a 79-year-old patient on hemodialysis.
EDISON_CFD : e-Science 인프라 기반의 전산유체역학 교육ㆍ연구용 시뮬레이션 소프트웨어 및 콘텐츠 개발
이성욱(S. Lee),이근배(K. B. Lee),박수형(S. H. Park),최성임(S. I. Choi),김종암(C. Kim) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.11
EDISON_CFD, an abbreviation of EDucation-research Integration through Simulation On the Net for Computational Fluid Dynamics, is a virtual organization designed to support educationㆍresearch in the e-Science environment. Our research group focuses on developing simulation software and contents based on numerical analyses. Through national research projects, many valuable R&D results have been developed in universities and research institutes. However, educational contents used for delivering advanced researches to inspire students still lack, and various nonlinear fluid dynamic phenomena make it harder to understand the physical reality intuitively. Thus, development of software and contents for effective and advanced educationㆍresearch is essential. The present work aims to establish the open platform of software and contents for online educationㆍresearch using the results of the state-of-art techniques.
이슬기(S.G. Yi),권형일(H.I. Kwon),최성임(S.I. Choi),박부민(P.M. Park),강영석(Y.S. Kang) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
A multidisciplinary design optimization of EAV (Electric Aerial Vehicle) propeller is carried out to maximize the efficiency of propeller performance. An objective is to minimize torque/power while maintaining a thrust level of baseline configuration at a given RPM and thus to improve propeller efficiency. Structural safety is also calculated during the design process and is ensured to satisfy a safety margin. A high-fidelity CFD and FEM-based structures computation is employed for a design. To test the accuracy of the analysis tools, a wind-tunnel test is conducted for the baseline propeller blade at operating RPM and numerical prediction is validated against experiment data. A derivative-free multidisciplinary design methodology based on the Kriging approximation model is used to achieve the design goal of minimization of torque. Design variables are mostly related to the shape of the blade and include twist distribution at eight cross sections along the blade span as well as the planform shape of the blade around tip area. Design results demonstrate a reduction of torque by almost 5% at constant thrust. Safety margin is well satisfied for a new blade.