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지식정보인프라 구축 선도를 위한 과학기술정보 정책연구 및 조사.분석
이정희,Lee, Jeong-Hui 한국과학기술정보연구원 2003 지식정보인프라 Vol.12 No.-
현재 우리나라는 지식정보인프라 관련 정책, 제도, 계획 등을 종합조정하고 체계적으로 연계, 지원할 수 있는 국가단위의 조정체계가 확립되어 있지 못하다. 또한 관련 기관간의 정책협의, 조정을 위한 기능이 매우 미약하다. 또한 새롭게 변화하는 지식정보유통의 패러다임의 변화에 대한 공공부문의 대응이 선진국에 비해 매우 뒤처지고 있다. 이러한 점에서 지식정보인프라의 구축을 선도하기 위한 관련 선행연구 및 방법론 개발과 이를 통한 개념정립과 전략개발이 매우 시급하다고 하겠다.
터빈블레이드의 냉각에서 충돌제트에 의해 변화되는 유동 및 열전달 특성에 관한 수치해석적 연구
이정희,김신일,유홍선,최영기,Lee, Jeong-Hui,Kim, Sin-Il,Yu, Hong-Seon,Choe, Yeong-Gi 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.12
A numerical simulation has been carried out for the jet impinging on a flat plate and a semi-circular concave surface. In this computation finite volume method was employed to solve the full Navier-Stokes equation based on a non-orthogonal coordinate with non staggered variable arrangement. The standard k-.epsilon. turbulent model and low Reynolds number k-.epsilon. model(Launder-Sharmar model) with Yap's correction were adapted. The accuracy of the numerical calculations were compared with various experimental data reported in the literature and showed good predictions of centerline velocity decay, wall pressure distribution and skin friction. For the jet impingement on a semi-circular concave surface, potential core length was calculated for two different nozzle(round edged nozzle and rectangular edged nozzle) to consider effects of the nozzle shape. The result showed that round edged nozzle had longer potential core length than rectangular edged nozzle for the same condition. Heat transfer rate along the concave surface with constant heat flux was calculated for various nozzle exit to surface distance(H/B) in the condition of same jet velocity. The maximum local Nusselt number at the stagnation point occurred at H/B = 8 where the centerline turbulent intensity had maximum value. The predicted Nusselt number showed good agreement with the experimental data at the stagnation point. However heat transfer predictions along the downstream were underestimated. This results suggest that the improved turbulence modeling is required.
이정희,최형호,Lee, Jeong-Hui,Choe, Hyeong-Ho 대한흉부심장혈관외과학회 1993 Journal of Chest Surgery (J Chest Surg) Vol.26 No.4
Esophageal atresia and tracheoesophageal fistula may occur as separate entities but usually occur in combination.The first report of esophageal atresia with tracheoesophageal fistula was done by Thomas Gibson in 1696.In1941, Haight and Towlseg performed the first successful primary repair,recently we were experienced a case of esophageal atresia with distal tracheoesophageal fistula in infant patient who presented the symptoms of dyspnea and vomiting.The operation was performed transpleurally through right 4th intercostal space.Patient tolerated all the operative procedure and recovered uneventflly.He was well-being without other problem.
이정희,임진수,Lee, Jeong-Hui,Im, Jin-Su 대한흉부심장혈관외과학회 1993 Journal of Chest Surgery (J Chest Surg) Vol.26 No.5
A clinical analysis of pleural effusion was done on 100 patients who were between 5 and 67 years old. The etiologic diagnosis of pleural effusion at the time of discharge were pulmonary tuberculosis in 38 cases[38%],pneumonia in 20 cases[20%],lung carcinoma in 16 cases[16%],liver cirrosis in 9 cases[9%],congestive heart failure in 4 cases[4%],nephrosis in 3 cases[3%],Meig,s syndrom in 3 cases[3%].liver abscess 2 cases[2%],pancreatitis in 1 cases[1%] and other metastatic malignancy in 4 cases[4%]. Their chief complaints was chest pain in 89 cases[89%],dyspnea in 74 cases[74%],coughing in 46 cases[46%], fever in 13 cases[13%],weakness in 12 cases[12%] and dizziness in 11 cases[11%].