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중증외상환자에서 알코올 섭취에 따른 중증도와 예후에 대한 연구
정호형 ( Ho Hyung Jung ),한상균 ( Sang Kyoon Han ),이성화 ( Sung Wha Lee ),박성욱 ( Sung Wook Park ),박순창 ( Soon Chang Park ),염석란 ( Seok Ran Yeom ),민문기 ( Moon Gi Min ),김용인 ( Yong In Kim ),류지호 ( Ji Ho Ryu ) 대한외상학회 2014 大韓外傷學會誌 Vol.27 No.4
Purpose: Alcohol ingestion is a significant risk factor for injuries. However, the influence of high blood alcohol concentration about the severe traumatic injury is controversial. The aim of study was to analyze the injury severity, prognosis in severe traumatic patients according to alcohol ingestion. Methods: This study was performed retrospectively with severe traumatic patients (Injury Severity Score≥16) who visited the emergency department at Pusan National University Hospital from January 2013 to December 2013. Results: In total 98 severe traumatic patients, blood alcohol concentration (BAC) positive group (BAC>30 mg/dl) is 42 (42.90%) patients and BAC negative group (BAC≤30 mg/dl) is 56 (57.10% )patients. Head and neck injury is significantly high in BAC positive group (35 patients, 83.3%) compared to BAC negative group (33 patients, 58.9%). Comparison of injury severity, outcome and mortality is not significantly different between two groups. Conclusion: In severe traumatic patients, head and neck injury occurred high in BAC positive group. Alcohol ingestion did not influence injury severity, outcome in severe traumatic patients. However, effort to decreasing injury related to alcohol ingestion and prospective multi-center study is needed. [ J Trauma Inj 2014; 27: 108-14 ]
유전체 대전 현상을 이용한 공기정화필터 개발에 관한 연구
염만오,이성화 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-
본 연구에서는 유전체 대전현상을 이용한 Compact한 공기정화 필터를 개발, 제작하여 그 특성실험을 행하였다. 이 경우 one-pass 집진효율이 41%였으나 밀폐실 내의 집진효율은 순환효과로 인해 30분 경과 후 집진효율이 95% 이상 되었다. In this paper, Phenomenon of dielectric charge has been studied in order to develop compact type air cleaner. In one-pass precipitation efficiency, dielectric type filter was 41%. But in shut room, efficiency was 95% over because of circulation effect after 30 minute. Because resistivity of dielectric is ??Ω-cm. discharge time between collected particle and dielectric electrode is longer than that of between collected particle and electrode. So dielectric collector type is more advantage in rescatter.
3-Tier System을 적용한 인터넷 쇼핑몰 구축방안
문석환,이성화 제주한라대학 2000 論文集 Vol.24 No.-
This study suggests the internet shopping mall based on 3-tier system which was the weak point of the overload of the client & server system and constructs the middle ware system applied to the platform of the electronic commerce. The main kernel theory of this suggestion was applied by gearing with WEB and RDBMS, appling active X server component, 3-tier system using MTS, and statistics agent. After that, the life period of application was extened, and component was distinguished by object-oriented concept, and logical capsulizing data structure was possessed.