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RISS 인기검색어
- 검색키워드
- 저자 : 한승완 (검색결과 149 건)
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한승완,최일곤,김상렬 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1
The effect of gas houdup and volumetric liquid-phase mass transfer coeffecient in the bubble coplumn with multiple draft tube were investigated experimentally, according to gas velocity, plate interval and the diameter and plate number of draft tube at 298±0.5K. The gas holdup and volumtric liquid-phase mass transfer coeffecient increased with decreasing the interval of draft tube when the diameter ratio of draft was small but decreased when the diameter ratio of draft tube was large. Also based on these observations, correlation equations of gas holdup and volumetric liquid phase mass transfer coefficients were proposed.
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矢狀分割骨折斷術後 骨內固定方法에 따른 咬合力下의 應力에 대한 有限要素法的 硏究
韓承完,金麗甲 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.1
Numerous studies have evaluated the stress analysis. Generally, we have used electrical resistance strain gages, brittle-coating, Moir's fringe analysis, photoelasticity and finite element method in stress analysis method. The finite element method is an accepted theoretical technique used in the solution of engineering problems. This method has also been used for biomechanical analysis in orthopedic, cardiovascular and dental structure. We presented 3-dimensional stress analysis of various rigid fixation mathod under accusal force after SSRO with finite element method. Rigid fixation mathods 1) Miniplate 2) Type I : transbuccal approach (reverse L type) 3) Type II : intraoral approach (reverse L type) 4) Type III : intraoral approach (all screw above mandibular canal) Occlusal force 1) Protrusive occlusion : force applied on incisor, canine and premolar area 2) Centric occlusion : force applied on premolar and molar area The results were as follows. 1. In screw fixation methods research, the total stress must appear in Type I screw fixation method in protrusive occlusion, and in centric occlusion the Type III screw fixation method shows the most total stress. 2. Among screw fixation methods, Type III screw fixation method works best for stress distribution in protrusive occlusion, and Type I screw fixation method disrtibutes in centric occlusion better than other types. 3. In screw fixation methods research, the side of C screw in Type II and III screw fixation methods results in considerable stress concentration in centric occrusion. 4. In miniplate screw fixation method research, stress was concentrated in middle and posterior part but there was almost no stress in anterior part. 5. In protrusive occlusion, tension stress appeared in the middle part of the miniplate but in centric occlusion, compression stress occured in same place.
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Calix[6]arene 유도체를 이용한 물속에 녹아있는 중금속 이온의 제거 효율성 연구
한승완,박유미,성대동,김상열 동아대학교 환경문제연구소 1992 硏究報告 Vol.15 No.1
The removal effectiveness of various heavy metal ions in aqueous solutions has been studied by means of spectroscopic and pH method. Treatment of calix[6]arene-p-hexa-sulfonate and O-n-hexa[6]arene-p-sulfonate to heavy metal ion solutions showed a good result to remove the big size atomic radii of the heavy metal. Stability constants were depended on the variation of pH likely to show the absorbance is higher at pH 8~10 region.
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한승완,김무섭,정치윤,최수길,Han, S.W.,Kim, M.S.,Jeong, C.Y.,Choi, S.G. 한국전자통신연구원 2013 전자통신동향분석 Vol.28 No.3
정보 통신 기술은 무수히 많은 사회적 공헌을 이루어냈지만 유해 정보 범람이라는 사회적 문제를 야기한 주체이기도 하다. 유해 정보 범람이라는 부작용을 해결하고 깨끗한 인터넷 환경을 조성하기 위해, 인터넷 환경의 유해 정보의 특성과 유해 정보를 차단하기 위한 현재 기술 수준을 분석하고 향후 기술 개발 발전 방향을 살펴보고자 한다.
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