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발전용 바이오중유의 혼합비율에 따른 배출가스 특성 연구
하종한,전철환,권용재 한국수소및신에너지학회 2015 한국수소 및 신에너지학회논문집 Vol.26 No.5
As our government is actively introducing the RPS (Renewable Portfolio Standards) as a national renewable energy obligation policy, power producers are using the various renewable energy to meet the RPS supply quota since 2012. Recently, it is appling to use power bio-fuel oil in bio-fuel oil demonstration project with power companies. In general, power bio-fuel oils are composed of mixture products of vegetable oil, animal fat, fatty acid ester and waste oil. It is already developing for a power plant as a renewable energy abroad. In Korea, it is studying a 100% combustion and blended combustion of heavy fuel oil and bio-fuel oil. In this study, we investigated fuel characteristics of mixed power bio-fuel oil and its emission performance. Especially, it was reduced emissions of bio-oil in industrial boilers due to bio-fuel properties as compare with fuel oil.
내시경적으로 제거한 식도의 과립 세포 종양 -증례보고 및 국내 문헌 고찰-
하종,이옥재,조활석,정태식,윤지향,이은정,민현주,김태효,정운태,조중현 대한소화기내시경학회 2003 Clinical Endoscopy Vol.26 No.2
Granular cell tumor is a benign tumor, commonly found in the skin, tongue, and breast but rarely in the esophagus. A 44-year-old man was referred from the private clinic because of an esophageal lesion found on endoscopy. Esophagoscopy revealed a white-yellowish polypoid lesion covered with normal looking mucosa in the upper esophagus. It was movable within the wall by pushing with forceps. Endoscopic polypectomy after ligation with elastic "O" band was performed without complication. Histologic diagnosis of granular cell tumor was made. It was stained strongly positive for S-100 protein. Another 20 cases of esophageal granular cell tumors reported in Korean literature were reviewed. (Korean J Gastrointest Endosc 2003;26:84-89) 과립세포종은 양성 종양으로 피부, 구강, 유방 등에서는 흔하지만, 식도에서는 드물게 발생한다. 저자들은 식후 상복부 불편감으로 위내시경 검사를 받은 후 식도의 점막하종양을 발견하고 내원한 44세 남자에서, ‘O’형 밴드 결찰술을 이용한 용종절제술을 시행하고 조직학적으로 과립세포종으로 확진하였기에 국내의 문헌고찰을 중심으로 보고한다.
하종한,Ha, Jong-Han 한국주거학회 1992 한국주거학회 논문집 Vol.3 No.1
This study is a trial to syustematize the types of Minga(house of the lower class) that is distributed in the whole Korean penninsula. It is thought that, it can be systematised by using the method of five step' assortment shich is able to divide the types of Minga. Five steps are as follows: 1. The system of appearance and evolution of floor 2. The system of forms 3. Areal distribution of forms 4. State of gathering of living spaces 5. Variety of forms
구 볼록 다각형들의 최대 교차를 찾기 위한 효율적인 구 분할 방식
하종성 한국CDE학회 2001 한국CDE학회 논문집 Vol.6 No.2
The maximum intersection of spherical convex polygons are to find spherical regions owned by the maximum number of the polygons, which is applicable for determining the feasibility in manufacturing problems such mould design and numerical controlled machining. In this paper, an efficient method for partitioning a sphere with the polygons into faces is presented for the maximum intersection. The maximum intersection is determined by examining the ownerships of partitioned faces, which represent how many polygons contain the faces. We take the approach of edge-based partition, in which, rather than the ownerships of faces, those of their edges are manipulated as the sphere is partitioned incrementally by each of the polygons. Finally, gathering the split edges with the maximum number of ownerships as the form of discrete data, we approximately obtain the centroids of all solution faces without constructing their boundaries. Our approach is analyzed to have an efficient time complexity Ο(nv), where n and v, respectively, are the numbers of polygons and all vertices. Futhermore, it is practical from the view of implementation since it can compute numerical values robustly and deal with all degenerate cases.