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대규모 혼합 정수계획 문제를 풀기 위한 라그랑지 이완기법과 벤더스 분할 기법과의 대칭적 관계
조성철,김세헌 한국경영과학회 1989 韓國經營科學會誌 Vol.14 No.2
We in this paper have defined the concept of ε-symmetric relation between the Lagrangean relaxation and the Bender's decomposition. This links the solutions of the Lagrangean subproblems and those of the Bender's subproblems even under positive duality gaps. As an application we have discussed the reduction of the size for a special class of problems.
독어 강변화 제3b부류 동사의 어간 구조 변천에 관한 연구
조성철 조선대학교 인문과학연구소 1999 인문과학연구 Vol.21 No.-
Die vorliegende Arbeit beabsichtigt, die historische morphologische Entwieklung der Stammformen bei den starken Verben der Klasse 3b im Deutschen zu untersuchen. 1. Die germ. e-Ablautreihe-Klasse 3b geht auf die idg. e-Ablautreihe-Klasse 3b zuru¨ck. Die idg. e-Ablautreihe-3b hat den quantitativen - und den qualitativen Ablaut auf der Grundlage des 'e' und danach wird L+K eingesetzt. ◁도식 삽입▷ (원문을 참조하세요) Nach den Lautgesetze und der Tempusstufenverteilung sind die Stammformen der germ. e-Ablautreihe-Klasse 3b wie folgt: ◁도식 삽입▷ (원문을 참조하세요) 2. Vom Got. bis zum Nhd. wird das Ablautsystem im allgemeinen nach dem Ftymologiecharakter, der Lautvera¨nderung, der l-Metathese und der Konsonantengemination des Stammlauts gebildet. Zumal es im Gegensatz zu den anderen germ. Sprachen im Got. 2 Ablautsysteme, d.h. e+l und e+r gibt, aber nach dem Lautzeichencharakter trotz gleicher Aussprache <ai´> anstatt <e> u. (au´> anstatt <u> geschrieben wird. Im nhd. Ablautsystem werden wegen der Assimilation des Stammvokals die 2 Pra¨terita bis zum Mhd. zum Sg. Pra¨t. oder Pl. Pra¨t. zusammengeschmolzen. Vom Got. bis zum Nhd. kann die Vera¨nderung der Stammformen in den starken Verben 3b folgendergestalt dargestellt werden. ◁도식 삽입▷ (원문을 참조하세요)
대규모 혼합 정수 계획 문제를 풀기 위한 라그랑지 이완 기법에 관한 이론적 고찰 : 벤더스 분할 기법과의 대칭적 관계
조성철,김세헌 한국경영과학회 1989 한국경영과학회 학술대회논문집 Vol.- No.1
We in this paper have defined the concept of ε-symmetric relation between the Lagrangean relaxation and the Benders' decomposition. This links the solutions of the Lagrangean subproblems and those of the Benders' subproblems even under positive duality gaps. As an application we have discussed the reduction of the size for a special class of problems.
북극해 항로(Northern sea Route) 진출 및 쇄빙상선 투자의 타당성에 관한 연구
조성철 한국해양대학교 국제해양연구소 2001 韓國海洋大學校 人文社會科學論叢 Vol.13 No.1
Abstract Since the Northern Sea Route (NSR) was formally open to the outer world in 1991, many countries have shown their interests on their possible use of NSR as an alternative commercial route for cargo transportation. However no regular transit flows have not been established yet exploiting the shortest distance connecting the Far East and the West Europe. This is mainly due to the lack of information needed to determine the economic advantages of using the NSR over other existing routes. This paper is to provide some fundamental economic and logistics information needed to see whether it will make sense to use NSR and to attemp to build an ice class merchant ship at this points from the Korean national point of view. Potential cargo flows are studied to find out a few promising products for transporting via NSR from the northern Russia and the neighboring countries to Korea. Besides economic efficiencies, some important aspects of relevant risks, service quality and relating issues needed for guaranteeing a stable logistics system are also discussed.
Primary Leiomyoma of the Chest Wall in a Pediatric Patient
조성철,이재희 대한소아혈액종양학회 2019 Clinical Pediatric Hematology-Oncology Vol.26 No.2
Primary leiomyoma of the chest wall is extremely rare. A 13-month-old boy presented to outpatient clinic of the department of pediatrics with a soft, movable, and palpable mass in the right supraclavicular area. Neck computed tomography revealed a 2.5-cm-sized soft tissue mass in the right anterior supraclavicular area. The mass was completely resected, and histopathological examination showed a localized primary leiomyoma with cystic change. The patient was followed up and has been disease-free for more than 11 months since surgery. To the best of our knowledge, 13 cases of leiomyoma of the chest wall have been reported to date, but this is the second case of primary leiomyoma of the chest wall in a pediatric patient. This report describes the clinical course of this case and presents a review of relevant literature.