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시간해상도 PIV를 이용한 델타형 날개에서의 와류 유동특성에 관한 연구
최민선,이현,이영호,Choi, Min-Seon,Lee, Hyun,Lee, Young-Ho 한국마린엔지니어링학회 2004 한국마린엔지니어링학회지 Vol.28 No.3
The dominant effect of the interaction between vortices, generated by the addition of the Leading Edge Extension(LEX) in front of the wing, was well observed in this experiment. In this study, systematic approach by PIV experimental method within a circulating water channel was adopted to study the fundamental characteristics of induced vertex generation, development and its breakdown appearing on a delta wing model with or without LEX in terms of four angles of attack($15^{\circ}$, $20^{\circ}$, $25^{\circ}$, $30^{\circ}$) and six measuring sections(30%, 40%, 50%, 60%, 70%, 80%) of chord length. Distributions of time-averaged velocity vectors and vortices over the delta wing model were compared along the chord length direction. High-speed CCD camera which made it possible to acquire serial images is able to get the detailed information about the flow characteristics occurred on the delta wing. Especially quantitative comparison of the maximum vorticity featuring the induced pressure distribution were also conducted to clarity the significance of the LEX existence.
최민선,박진수,Choi Min-Seon,Park Jin-Soo 해양환경안전학회 2005 해양환경안전학회지 Vol.11 No.2
미국은 국가안보와 해운산업 국제 경쟁력 강화를 위하여 미 연방상선대학과 같은 4년제 대학교육으로 상선사관을 양성하고 있다. 미국의 해기사 양성제도는 크게 연방정부에서 지원 운영하는 Academy (U. S. Merchant Marine Academy와 U. S. Coast Guard Academy)와 각 주(State)에서 지원 운영하는 캘리포니아해양대학교 등 6개 주립대학의 정규 4년제 교육을 통하여 이루어진다. 본 연구에서는 미국 해기사 교육기관 중 교육중심의 캘리포니아 해양대학의 교육제도, 실습방법, 실습선 운영형태를 파악하여 우리나라 해기사 교육제도에 도움이 되게 하고자 한다. This paper presents the maritime education and training at CMA. There are two kinds of Federal Maritime Academies, i.e. U. S. Merchant Marine Academy (USMMA) and U. S. Coast Guard Academy, which are supported by federal government and six State Maritime Academies operated by each state. CMA is a unique campus of the California State University(CSU). A specialized education combining classroom instruction, hands-on experience and professional development prepare students for a successful career in international business and logistics, maritime policy, engineering, technology or in the maritime and transportation industries. All students of CMA, under licensed faculty supervision, learn and train aboard the Training Ship Golden Bear during a two-month training cruise in their first year at CMA. Second-year students participate in a land-based cooperative, or sail on a commercial cruise or the Training Ship GOLDEN BEAR depending on their major. Third-year maritime licensing option students take a final cruise on the training ship, while other students participate in an additional land-based cooperative. In their senior year, students take license exams to complete graduation requirements.
Enterovirus 71에 의해 발생된 수막척수뇌염이 합병된 수족구병 5례
최민선(Min Seon Choi),노영일(Young Il Rho) 대한소아신경학회 2011 대한소아신경학회지 Vol.19 No.2
우리나라는 인구밀도가 높고, 영아 시기부터 아이를 보육 시설에 맡기는 경우가 많으며 해외여행의 빈도도 점차 증가하고 있어 수족구병의 급속한 전파 및 유행의 가능성이 크다. 손씻기 등의 개인 위생 관리는 물론, 바이러스의 전파가 쉽게 이루어질 수 있는 가정, 보육시설, 놀이터, 여름 캠프, 병원 내에서의 철저한 위생관리도 필요하다. 2009년 5월에 사망 사례 보고 이후 많은 부모들이 수족구병에 대해 막연한 두려움을 느끼고 있다. 이에 저자들은 엔테로바이러스 71에 의한 신경학적 합병증이 동반되었던 수족구병 환자들에서 면역글로불린 사용이나 대증요법으로 후유증 없이 완전히 회복된 5례를 경험하였고, 이에 따라 엔테로바이러스 71에 의한 수족구병의 심각성에 대해 인식을 높이고, 특히 신경학적 검사가 어려운 어린 연령에서 자세한 문진이 필요하며, 엔테로바이러스 감염 환자에서 신경학적 합병증의 발생 여부를 면밀히 감시해야 함을 강조하고자 본 증례를 보고하는 바이다. Hand-foot-and-mouth disease (HFMD) is a viral illness with a distinct clinical presentation of oral and characteristic distal extremity lesions. It is caused by members of the enterovirus genus, namely, coxsackievirus A16 or enterovirus 71. HFMD is more severe in infants and children than adults, but generally, the disease has a mild course and is self-limiting. However, in recent epidemiology of HFMD in Asia, severe cases with complications have been reported. Enterovirus 71 may cause myocarditis, pneumonia, and severe neurological complications such as brainstem encephalitis, aseptic meningitis, acute flaccid paralysis, meningoencephalitis, meningomyeloencephalitis, and even death. A large outbreak of HFMD in Taiwan and Singapore caused by enterovirus 71 had a high mortality rate; the deaths resulted from pulmonary hemorrhage, interstitial pneumonitis, or brainstem encephalitis. HFMD was also epidemic in Korea in the spring of 2010. Severe cases with complications including neurological complications and death have been reported in HFMD patients, thus it has become a public health issue. We report five children who had severe HFMD caused by enterovirus 71 with meningomyeloencephalitis which caused a disturbance in consciousness, motor weakness, strabismus, and voiding difficulty. There was no mortality, and no patients exhibited sequelae.