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유한 요소법을 이용한 자동차용 다이어프램 스프링의 최적설계
김민관(Min-Kwan Kim),이춘열(Choon- Yeol Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A diaphragm spring is an important component of a clutch assembly, characteristics of which depend largely on that of a diaphragm spring. A diaphragm spring is subject to high stress concentration in driving condition, which frequently causes cracks and fracture around finger area. In this paper, behavior of a diaphragm spring is analysed by finite element method to calculate sensitivity of design parameters, which is used to perform optimal design of diaphragm spring shape. As an object function, tangential stresses are taken and minimized to improve durability. Characteristics of the diaphragm is used as equality constraint to maintain the original design purpose and sequential linear programming(SLP) is utilized as an optimization tool. With optimized design, it is verified that concentrated stress is decreased maintaining release load characteristic.
알벤다졸(400 mg) 1회 복용에 의해 유발된 급성 독성간염 1예
김민관 ( Min Kwan Kim ),박혜원 ( Hye Won Park ),김원진 ( Won Jin Kim ),박철민 ( Chul Min Park ),홍지연 ( Ji Yeon Hong ),조성진 ( Seung Jin Cho ),장명국 ( Myoung Kuk Jang ) 대한내과학회 2008 대한내과학회지 Vol.75 No.5
Drug-induced hepatotoxicity is injury to the liver as a result of drug exposure. Due to their unpredictable nature, drug-induced liver injuries pose a serious problem for clinicians, health agencies, and pharmaceutical firms. Albendazole is a benzimidazole with wide spectrum coverage as an antiparasitic drug. Very few cases of high-dose albendazole-induced hepatotoxicity have been reported so far, and no case in response to a single dose. A 25-year-old man presented to our hospital with dark urine. Twenty days prior to presentation, he took a tablet of albendazole (400 mg) as a prophylactic treatment for lumbricosis. Upon laboratory analysis, aspartate aminotransferase (AST) was 748 IU/L, alanine transaminase (ALT) was 939 IU/L, and total/direct bilirubin was 9.3/7.3 mg/dL. The patient was negative for viral markers (HAV, HBV, and HCV) and autoantibodies. Abdominal ultrasonography revealed no evidence of chronic liver damage. The pathology was compatible with drug-induced hepatotoxicity. The patient improved with conservative management only. (Korean J Med 75:564-568, 2008)
Analysis of Consulting Research Trends Using Topic Modeling
Min Kwan Kim(김민관),Yong Lee(이 용),Chang Hee Han(한창희) 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.4
‘Consulting’, which is the main research topic of the knowledge service industry, is a field of study that is essential for the growth and development of companies and proliferation to specialized fields. However, it is difficult to grasp the current status of international research related to consulting, mainly on which topics are being studied, and what are the latest research topics. The purpose of this study is to analyze the research trends of academic research related to ‘consulting’ by applying quantitative analysis such as topic modeling and statistic analysis. In this study, we collected statistical data related to consulting in the Scopus DB of Elsevier, which is a representative academic database, and conducted a quantitative analysis on 15,888 documents. We scientifically analyzed the research trends related to consulting based on the bibliographic data of academic research published all over the world. Specifically, the trends of the number of articles published in the major countries including Korea, the author key word trend, and the research topic trend were compared by country and year. This study is significant in that it presents the result of quantitative analysis based on bibliographic data in the academic DB in order to scientifically analyze the trend of academic research related to consulting. Especially, it is meaningful that the traditional frequency-based quantitative bibliographic analysis method and the text mining (topic modeling) technique are used together and analyzed. The results of this study can be used as a tool to guide the direction of research in consulting field. It is expected that it will help to predict the promising field, changes and trends of consulting industry related research through the trend analysis.
김민관(Min Kwan Kim),이정우(Jungwoo Lee),김영명(Young Myung Kim),이기광(Kikwang Lee),한창희(Chang Hee Han) 한국데이타베이스학회 2016 Journal of information technology applications & m Vol.23 No.2
Recently, 3D printing technology has been considered as a core applicable technology because it brings many improvements such as the development of medical technology, medical customization, and reducing production cost and shortening treatment period. This research suggests a market prediction framework for medical 3D printing business. As an immature market situation, it is important to control some uncertainty for market prediction such as a customers’ conversion rate. So we adopt decision making tree (DMT) model which used to choose an optimal decision making among diverse pathway. Among medical industries this paper just focuses on dentistry business. For predicting a 5 year period trend expected market size, we identified some replaceable denture procedure by 3D printing, collected related data, controlled uncertain variables. The result shows that medical 3D printing business could be a market of 28.2 billion won at 1st year and in the end of fifth year it could become on a scale of 61.1 billion won market.
Warfarin에 의한 출혈 환자에서 POC장비로 확인된 CYP2C9과 VKORC1 유전자의 변이 조합
김보성 ( Bo Sung Kim ),이동현 ( Dong Hyun Lee ),박혜경 ( Hye Kyong Park ),김민관 ( Min Kwan Kim ),김석현 ( Suk Hyun Kim ),김경한 ( Kyung Han Kim ),김무현 ( Moo Hyun Kim ) 대한내과학회 2013 대한내과학회지 Vol.85 No.1
A 69-year-old female Korean patient was initially prescribed warfarin for the prevention of systemic thromboembolism due to atrial fibrillation. One month later, multiple bruises and subcutaneous hematomas were evident, and laboratory testing revealed a prolonged prothrombin time (PT) of > 106s. After admission, the PT was corrected via fresh frozen plasma transfusion and intravenous vitamin K infusion. We sought to determine the cause of the PT prolongation, suspecting that genetic cause may have had an effect on the variation in the warfarin dose requirement. A point-of-care gene test device (Verigene® system; Nanosphere, Northbrook, IL) revealed CYP2C9 *1/*3 heterozygosity and a VKORC1 A/A single nucleotide polymorphism. Although it is well established that CYP2C9 or VKORC1 gene polymorphisms can influence warfarin dose requirements, they can be easily neglected, with detrimental outcomes. Through our experience with CYP2C9 and VKORC1 polymorphism causing bleeding complications during warfarin treatment, we aim to emphasize the importance of pharmacogenetic testing to avoid this potential oversight. (Korean J Med 2013;85:87-91)
《상한론(傷寒論)》 의 육경변증(六經辨證) 설문에 관한 연구
박민관 ( Min-kwan Park ),김민용 ( Min-yong Kim ),박영재 ( Young-jae Park ) 대한한의진단학회 2005 大韓韓醫診斷學會誌 Vol.9 No.2
Summary: It is well known that Treatise on Exogenous Febrile Disease is one of the oldest and most authoritative books in Oriental Medicine, suggesting the concept of Exogenous Febrile and Six channels as a theoretical basis of clinical experience and prescription. But, since Thang Thongjing had written the book, the numberous medical practitioners and theorists asserted their various and different views on the concept of Exogenous Febrile and its Six channels. 3UM-3YANG of Treatise on Exogenous Febrile Disease is basically the thing of specialization UM-YANG, eventually UM-YANG are two functional characteristics in human body. It is specialized to 3UM-3YANG by spatial and time criteria. Therefore, it is important to apprehend the concept correctly that was written on Treatise on Exogenous Febrile Disease. I`d like to look into a bodily state by answering the question that is easy to access and based on Six Channels.
손광호,김민관,지병철,전경문,김한도,Sohn, Kwang-Ho,Kim, Min-Kwan,Ji, Byung-Chul,Jeon, Kyung-Moon,Ghim, Han-Do 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.2
Flame retarding high impact polystyrene (HIPS) with a reduced amount of halogen flame retardant was prepared by using phosphoric and inorganic flame retardants to improve the shortcomings of the halogen-containing counterparts, such as emission of poisonous gas and environmental pollution. Red phosphorous and metallic flame-retardants were applied for this purpose. Effects of these non-halogen type flame retardants on the thermal and mechanical properties, as well as flame retardancy, of the flame retarding HIPS were examined by thermogravimetric analysis, differential scanning calorimetry, Izod impact strength, and the UL94 flame retardation test.
적린 및 무기계 난연제를 이용한 비할로겐계 난연성 폴리프로필렌의 제조
손광호,김민관,이홍렬,지병철,김한도,Sohn, Kwang-Ho,Kim, Min-Kwan,Lee, Hong-Yeol,Ji, Byung-Chul,Ghim, Han-Do 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.5
Polypropylene (PP) is one of the most widely used materials because of its rational mechanical characteristics. However, the application of PP is significantly limited and infrequent due to its easy combustion and dripping properties. To improve the thermal versatilities of PP, halogen-containing compounds, alone or in conjunction with antimony trioxide, have frequently been used in the flame retarding PPs. Halogen-containing flame retarding agents, however, are supposed to produce corrosiveness, smoke emissions, and toxicity which are combustion products. In this study, red phosphorous, metal oxides, and zinc borate were used as flame retarding agents for PP. The thermal properties of injection-molded PP specimens were characterized by thermogravimetric analysis, differential scanning calorimetry analysis, and UL94 flame retardation tests. Results showed that increased char formation on the surface can confirm flame retardation of the UL94 V0 grade of PP.