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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.
구상의 점 집합을 포함하는 소밴드와 수치제어 절삭가공의 국부적 접근성 문제
하종성(Jong Sung Ha) 한국정보처리학회 2000 정보처리학회논문지 Vol.7 No.7
This paper deals with the problem of determining small-bands enclosing a given set of points on the sphere. The small-band is a spherical region, whose boundary is composed of two circles, and which does not contain any great circle. It is a kind of domains that is derived from formalizing the local accessibility problems for 3-axis NC machining into spherical containment problems so as to avoid the gouging. It also can be generated in 4- and 5-axis machining. When a set of points and the size of a great-band are given, the methods for computing a feasible band and all feasible bands enclosing in and time have been suggested, respectively. These methods can be applied into the cases of small bands. However, the method for determining a smallest great band enclosing cannot be applied into the cases of small bands since the solution region may contain holes. In this paper, we concentrate on the method for determining the smallest small-band enclosing and suggest an time algorithm, where is the number of points on the sphere.