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김민형,이민제,송시우,박근수 한국정보과학회 2023 정보과학회 컴퓨팅의 실제 논문지 Vol.29 No.12
We conducted a comparative analysis of CRaB and DviCL, two state-of-the-art algorithms for solving the graph isomorphism problem, across various query graphs. CRaB uses backtracking to verify graph isomorphism, while DviCL constructs a canonical form of the graph through a divide-and-conquer approach. CRaB was consistently faster than DviCL in nonisomorphic graph pairs and also generally demonstrated a faster execution time than DviCL for isomorphic graph pairs. Furthermore, our experiments with synthetic graphs revealed that both algorithms demonstrated nearly linear execution time with respect to the number of vertices and edges. We identified certain graphs where CRaB's performance slows down. Based on these findings, we expect that additional analysis could lead to the development of improved algorithms for the graph isomorphism problem.
김민형,안비오,김종부,안두수 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1
The last process of water treatment plant is filtration which fixes the quality and the quantity of water. Determining the time when to finish the backwash is very critical in filteration process. In general, backwash finishing time is determined by the operator's observation or duration time which is pre-set. In this study, to decide the backwash finishing time, a method using the turbidity of the used backwash water is applied to have more flexible backwash duration according to the degree of filter dirtiness.
특수체육교사의 장애학생 스포츠 활동 지도경험: 통합교육현장 중심으로
김민형,임효경 한국특수체육학회 2022 한국특수체육학회지 Vol.30 No.2
The study was conducted to prepare measures for the participation of students with disability in sports activities in the field of Inclusive middle and high school education. This study aims to share the results by observing the field of Inclusive education and in-depth exploration of the sports activity teaching experience of adapted physical education Teachers within it. Therefore, in order to understand the phenomenon in a more specific and contextual situation, three research participants (Adaptive physical education teachers) were selected and conducted in-depth interviews, participation, and nonparticipation observation. In addition, literature and documents related to reflection diaries, training diaries, and participation in students with disabilities sports activities were collected and analyzed. As a result, two main themes were derived(‘Finding identity in busy daily life’, ‘Identity confirmed through student growth’). And 7 sub-themes were derived('Adapting to the inclusive education field', 'Efforts to find identity as a major', 'New challenge: Participation in competitions', 'Growth through harmony', 'Growth through new experiences and challenges', 'Experience through sports Excitement and tension', 'Growth through participation in competitive sports). Based on these results, we discussed what sports activities for students with disabilities that can be implemented within the school curriculum are. In addition, a discussion on the role and importance of adapted physical education teachers and follow-up studies were suggested. 본 연구는 중·고등학교 통합교육현장에서 장애학생들의 스포츠 활동 참가를 위한 다양한 방안들을 마련하기 위해, 통합교육현장에서 장애학생들을 지도하고 있는 특수체육교사들의 스포츠 활동 지도경험을 심층적으로 탐색하여, 그 결과를 공유하고자 한다. 보다 구체적이고 맥락적인 상황에서 현상을 이해하기 위해 연구참여자(특수체육교사)3명을 선정하여 심층 면담과 참여·비 참여 관찰을 실시하였으며, 반성일지, 훈련일지, 장애학생 스포츠 활동과 관련된 각종 문헌 및 문서들을 수집하여 분석하였다. 그 결과, 2개의 대주제(바쁜 일상에서 정체성 찾기, 학생의 성장을 통해 확인하는 정체성)와 7개의 하위주제(통합교육현장 적응하기, 전공자로서 정체성 찾기 위한 노력, 새로운 도전: 스포츠 대회 참가, 어울림을 통한 성장, 새로운 경험과 도전을 통한 성장, 스포츠를 통해 경험하는 설렘과 긴장, 경쟁 스포츠 참여를 통한 성장)가 도출되었다. 이러한 결과를 바탕으로 중·고등학교 교육과정 안에서 이루어질 수 있는 장애학생 스포츠 활동 및 특수체육교사의 역할과 중요성에 대한 논의와 후속 연구를 제언하였다.
김민형,장석종 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.2
Relating to toxicity of methylmethacrylate monomer, there are many evidences of pathological changes, ie. parenchymal degeneration in pulmonary, hepatic, and renal tissue of animal with high dosage. But the reports about the effects of methylmethacrylate monomer on renal function are rare. Therefore the author intended to investigate the effects of methylmethacrylate monomer on parameters of renal function. Experimental dosages of methylmethacrylate monomer were 0.1㎕/min and 0.25㎕/min, of which didn't cause the arterial hypotension. The infusion was perfermed at a rate of 30 ml/hr for 1 hour. During the one hour periods of administration of methylmethacrylate and recovery proces blood and urine samples were collected and analyzed. Plasma clearances of substances various were obtained by the measuring the plasma and urine concentrations of inulin, PAH, osmolarlty sodium and potassium. The results were summarized as follows. 1. Glomerular filtration rate and renal plasma flow were not affected at a dose of but tended to decrease at a dose of 0.25ul/min of methylmethacrylate monomer. 2. Urine flow was reduced significantly (p<0.05) by methylmethacrylate monomer. 3. Urine osmolarity was increased significantly (p<0.05) by methylmethacrylate monomer. 4. Negative free water clearance was increased significantly (p<0.05) by methylmethacrylate monomer. 5. Osrnolar clearance and sodium and potassium reabsorption rate were not affected significantly by methylmethacrylate monomer. From the above results, it was suggests that methylmethacrylate monomer caused the reduction of urine flow through enhancement of tubular free water reabsorption and partially affecting the GFR and RPF.
김민형 한국국방연구원 2019 The Korean Journal of Defense Analysis Vol.31 No.2
The main goal of this article is to explain the American failure of deterring North Korean nuclear proliferation. Specically, it examines the underlying reasons for which U.S. inhibition policy toward North Korea has failed, despite the numerous attempts by U.S. administrations (both Republicans and Democrats) to prevent North Korea’s nuclear development. The central thesis of the article is that while there were multiple reasons for the American failure of North Korean proliferation, the most important ones were U.S. misperceptions about both North Korea’s and China’s intentions and U.S. distraction by the war on terror. These factors, along with Pyongyang’s shrewd strategies to manipulate Washington, Seoul, and Beijing, played a key role in the emergence of a nuclear North Korea.