연료전지 동특성 모델링 비교 분석

고정민(Jeong-Min Ko),김종수(Jong-Soo Kim),최규영(Gyu-Yeong Choe),이병국(Byoung-Kuk Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.4

본 논문에서는 Charge double layer 현상과 전압강하/회복 현상을 구현한 연료전지의 동특성 모델링을 수행하고 실험결과와 비교 분석하였다. Charge double layer 현상의 이론을 분석하고 수식을 통해 구현한 모델링과 물리적 지연 현상을 실험을 통해 확인하여 특성을 전압장하와 회복현상을 표현하는 모델링을 수행 하였다. 또한, 시뮬레이션 결과를 각각 실험결과와 비교 분석하여 실제 연료전지를 구현할 때에는 제안한 모텔에서의 전압강하와 회복현상을 고려해야 합을 검증하였다.

한국인 Kabuki 증후군 환아들의 임상적 표현형 및 세포유전학적 양상

고정민(Jung Min Ko),황정민(Jeong-Min Hwang),김현주(Hyon-Ju Kim) 대한의학유전학회 2010 대한의학유전학회지 Vol.7 No.1

목적 : Kabuki 증후군은 정신 지체를 동반하는 선천성 다발성 기형 증후군이다. 우리나라에서는 현재까지 6례의 Kabuki 증후군 증례가 산발적으로 보고 된 바 있다. 본 연구에서는 저자들이 경험한 Kabuki 증후군 환자 6명의 임상 및 유전학적 특징을 조사하고, 이를 외국 문헌들과 비교 분석해 보고자 하였다. 대상 및 방법 : 2003년부터 2009년까지 아주대학교 병원 유전질환 전문센터에서 Kabuki 증후군으로 진단되어 추적 중인 6명의 한국인 여아를 대상으로 하였으며, 의무기록을 후향적으로 검토하여 이들의 임상 및 검사 소견을 수집하고 분석하였다. 결과 : 6명의 환자 모두가 특징적인 얼굴 모습 및 발달 지연 소견을 보이고 있었고, 손끝의 태아 패드 또한 모든 환자에서 확인되었다. 이외에도 대부분의 환자가 생후 성장 지연(83.3%) 및 근력 저하(83.3%) 소견을 보였다. 안과적인 이상 또한 흔하게 동반되었는데, 특히 사시(83.3%)가 가장 흔한 안과적 이상 소견이었다. 선천성 심장 기형은 50%의 환자에서 동반되었으며, 골격계통의 증상으로는 짧거나(83.3%) 굽은(50%) 5번째 손가락, 관절의 과신전(50%) 및 고관절 탈구(16.7%) 등으로 다양하였다. Kabuki 증후군의 가족력을 가진 환자는 없었으며, 핵형 분석 및 array CGH를 포함한 세포유전학적 분석에서 Kabuki 증후군의 원인으로 생각되는 이상 소견은 발견되지 않았다. 결론 : 한국인 Kabuki 증후군 환자들이 보이는 임상 양상은 매우 광범위하며 다양한 신체 기관을 침범하고 있다. 비록 Kabuki 증후군의 임상적 특징들이 비교적 잘 알려져 있기는 하지만, 아직 질환의 원인으로 추정되는 유전적 이상은 확실히 밝혀지지 않았다. 적절한 질환의 관리 및 유전 상담이 이루어지기 위해서는 Kabuki 증후군의 자연 경과 및 유전적 배경에 대한 추가적인 연구가 필요하다고 생각된다. Purpose : Kabuki syndrome is a multiple congenital malformation syndrome with mental retardation. It was named after its characteristic appearance, a face resembling that of an actor in a Kabuki play. To date, six Korean cases of Kabuki syndrome have ever been reported. Here, we present the phenotypic and genetic characteristics of six patients with Kabuki syndrome. Materials and Methods : Between 2003 and 2009, six Korean girls have been diagnosed and followed up as Kabuki syndrome at Center for Genetic Diseases of Ajou University Hospital. Their clinical and laboratory data were collected and analyzed by the retrospective review of medical records. Results : All six patients showed the characteristic facial dysmorphism and developmental delay. Persistent fingertip pads were also found in all patients. Most patients showed postnatal growth retardation (83.3%) and hypotonia (83.3%). Opthalmologic problems were common, particularly for strabismus (83.3%). Congenital heart defects were present in three patients (50%). Skeletal abnormalities including 5th finger shortening (83.3%), clinodactyly (50%), joint hypermobility (50%) and hip dislocation (16.7%) were also observed. There was no patient who had positive family history for Kabuki syndrome. Cytogenetic and molecular cytogenetic analyses including karyotyping and array CGH could not reveal any underlying genetic cause of Kabuki syndrome. Conclusion : Korean patients with Kabuki syndrome showed a broad spectrum of clinical features affecting multiple organ systems. Although clinical manifestations of Kabuki syndrome have been well established, our results failed to detect recurrent chromosome aberrations which could cause Kabuki syndrome. Its natural history and genetic background remains to be further studied for providing appropriate management and genetic counseling.

Web2.0시대의 지식정보서비스산업의 동향과 기업사례

고정민(Ko Jeong-min) 한국문화산업학회 2006 문화산업연구 Vol.6 No.2

This study examines the trend of knowledge-based information service industry and the cases of related company. Especially in the web 2.0 era, the environment of this industry is changed in terms of demand and supply very rapidly. New trend such as user created contents, collective intellectual and social networking shows up and the companies of the knowledge-based information service industry try to cope with this trend. Cyworld and iMBC in Korea, youtube.com, amazon in U.S. and hatena in Japan are the forerunner in web 2.0 era. This study shows these companies' strategy and new services in new paradigm of web 2.0. Finally, this study suggests that the copyrights law should be revised and adapted to UCC environment and new strategy in company should be developed considering the impact of web 2.0. This study examines the trend of knowledge-based information service industry and the cases of related company. Especially in the web 2.0 era, the environment of this industry is changed in terms of demand and supply very rapidly. New trend such as user created contents, collective intellectual and social networking shows up and the companies of the knowledge-based information service industry try to cope with this trend. Cyworld and iMBC in Korea, youtube.com, amazon in U.S. and hatena in Japan are the forerunner in web 2.0 era. This study shows these companies' strategy and new services in new paradigm of web 2.0. Finally, this study suggests that the copyrights law should be revised and adapted to UCC environment and new strategy in company should be developed considering the impact of web 2.0.

디지털융합이 영화산업에 미치는 영향에 관한 연구

고정민(Ko Jeong-Min) 한국문화산업학회 2008 문화산업연구 Vol.8 No.2

This study is to analyze the influence of digital convergence on movie industry and find the implication for its solution. Digital convergence results in three changes of value chain, industry structure and market structure. In terms of value chain, three decreases in traditional film, distribution and theater and three increases in movie file, digital transportation method and digital media can be described. And the entry of telecommunication company to movie industry in terms of industry structure and the sharp decrease of market size caused by illegal download in terms of market structure show up. In order to cope with this environmental change, the following strategies are needed. First, revenue source of new digital media should be developed and digital cinema be introduced as early as possible. Second, telecommunication companies to enter the movie industry make an effort in export of movie content. Third, the enlargement of regulation concerned with illegal download of movie through internet and the exploration of new media business model are required. This study is to analyze the influence of digital convergence on movie industry and find the implication for its solution. Digital convergence results in three changes of value chain, industry structure and market structure. In terms of value chain, three decreases in traditional film, distribution and theater and three increases in movie file, digital transportation method and digital media can be described. And the entry of telecommunication company to movie industry in terms of industry structure and the sharp decrease of market size caused by illegal download in terms of market structure show up. In order to cope with this environmental change, the following strategies are needed. First, revenue source of new digital media should be developed and digital cinema be introduced as early as possible. Second, telecommunication companies to enter the movie industry make an effort in export of movie content. Third, the enlargement of regulation concerned with illegal download of movie through internet and the exploration of new media business model are required.

국내 모바일 콘텐츠 비즈니스의 구조와 발전방향

고정민(Jeong-Min Ko),유승호(Seoung-Ho Ryu) 사이버커뮤니케이션학회 2004 사이버 커뮤니케이션 학보 Vol.- No.14

본 연구는 국내 모바일 콘텐츠 비즈니스의 구조의 분석 및 발전방향에 관한 시론적 연구이다. 국내 모바일 콘텐츠산업은 성장성, 국내 산업환경과의 적합성 등의 측면에서 타 산업에 비해 매우 중요한 의미를 가지고 있다. 그러나 최근 가입자의 포화 등 구조적인 문제를 안고 있는 모바일 콘텐츠 비즈니스가 미래 성장동력으로서 거듭나기 위해서는 시장, 공급주체 및 제도적인 면에서 새로운 발전모델의 구축이 시급하다. 따라서 본 연구는 국내 모바일 콘텐츠 비즈니스의 구조분석 및 발전방향을 제시하기 위해, 먼저 모바일 콘텐츠 산업의 성장 동인을 사회적 요인과 산업적 요인으로 구분하여 살펴보았고, 나아가서 일본과 유럽의 모바일 콘텐츠 산업을 분석함으로써 비즈니스의 전략적 시사점을 도출하였다. 결론적으로, 다음과 같이 국내 모바일 콘텐츠 비즈니스의 발전방향을 제시하였다. 첫째, 무선콘텐츠 시장자체를 확대시키기 위해 경쟁국에 앞서 킬러콘텐츠의 개발, 신모바일기기의 도입, 정액요금제, 실질적 무선망개방 등 시장을 견인할 수 있는 방안을 조기에 도입할 것을 제안하였다. 둘째, 경쟁력 있는 CP를 육성하기 위해 CP의 브랜드화 가능성을 타진하였고, 마지막으로 모바일콘텐츠 산업의 핵심 주체인 이동통신사와 CP의 상생을 위한 윈윈(win-win) 구조 방안에 대해 제시하였다. This study is the exploration that is concerned with the structure of domestic mobile contents business and its developmental direction. In domestic case, Mobile contents industry is more important than any other industry in terms of growth and conformity with Korean industry environment, symbol in Korean modem society, etc. About this, we must immediately achieve to model of developmental direction through structural analysis of the domestic mobile contents business. In order to present the structure of domestic mobile contents business and its developmental direction, we examined a growth factor of mobile industry from standpoint of both social factor and characteristics of industry. Also we analyzed mobile contents industry in Japan and Europe. In conclusion, We suggested the developmental direction of domestic mobile contents business as follows. First, by basic developmental direction, We suggested that mobile market size should be expanded by introducing driving force in advance of competitive countries such as killer contents, new mobile devices and flat fee system and opening mobile net to internet portal company and CP, etc. And to raise competitive CP, We tapped a possibility of branding CP. Finally, We suggested the device of win-win structure of both mobile network company and CP as the core of industry of mobile contents.

전생활혈탕가미방(全生活血湯加味方)의 면역조절 작용을 통한 항관절염 효능에 관한 연구

고정민 ( Jeong Min Ko ),최창민 ( Chang Min Choe ),조한백 ( Han Baek Cho ),김송백 ( Song Baeg Kim ) 대한한방부인과학회 2009 大韓韓方婦人科學會誌 Vol.22 No.2

애니메이션 총량제의 문제점 및 개선방안

고정민(Jeong-Min Ko),김영재(Young-Jae Kim) 한국콘텐츠학회 2010 한국콘텐츠학회논문지 Vol.10 No.1

본 연구는 애니메이션 총량제 시행의 한계점을 보완하여 그 개선방안을 마련하는 데 있다. 본 연구는 방송업계종사자, 애니메이션업계 종사자, 애니메이션전공 교수, 관련 연구자, 관련 정부부처 등 관련전문가 10여명이 2009년 1월부터 3월까지 8차에 걸쳐 총량제에 대한 토론을 거치면서 문제점과 대안을 마련하는 전문가 인터뷰와 집단 회의를 통한 방법론을 사용하였다. 총량제가 도입된 지 4년이 지나면서 신규애니메이션 제작물량의 증가, 기업체수의 증가 등의 양적인 팽창을 보여 왔으나 시청률의 지속적인 하락, 시청률이 낮은 시간대로의 애니메이션 방송, 애니메이션의 질적 하향 평준화, 총량제의 지상파 한정, 최소물량 확보수단으로 변질 등의 한계점이 나타났다. 이러한 한계점에 대해 다음과 같은 3가지 개선안을 마련하였다. 첫째, 케이블 및 위성으로의 총량제 확대, 둘째 프라임타임대 방송의 인센티브제공, 셋째 미디어 주도형 투자 지원 등이다. 특히 이 연구는 이러한 애니메이션 정책은 강제규정이 아니라 지원제도로 시행함으로써 업계의 자발적인 참여를 통해 시장원리가 적용되도록 유도해야 한다는 점을 강조하고 있다. This study is to suggest the solutions about the problems of maximum requirements of animation broadcasting. About 10 experts of broadcasting, animation production, animation related professor and researcher and government take part in this study and discuss problems and their solutions of maximum requirements of animation broadcasting from January to march in 2009. This policy introduced 4 years ago had the positive effects such as the increase of animation production and the number of animation production company, but also the negative effects such as continuous decrease of rating in terrestrial broadcasting and transferring to low rating time slot of animation, downward equalization of animation and changing to minimum securement method. This study suggested the solutions as follows; first the enlargement of this policy to cable and satellite broadcasting, second introducing incentive policy in prime time, third the subsidy of media oriented investment. Finally this study stressed that this solutions should not be compulsory order but voluntary system.

한류 콘텐츠의 경쟁원천에 대한 연구

고정민(Ko Jeong-Min) 한국문화산업학회 2005 문화산업연구 Vol.5 No.2

This study examines the Korean cultural industry which is the major competitive factor of 'Korean Wave' with diamond model of Michael Porter. This study shows that the aggressive niche market strategy of Korean company and competitive market environment among cultural companies such as the terrestrial broadcasting companies are major competitive edges as firm strategy and structure factor in diamond model. And lots of manpower related in cultural industry and many traditional and cultural assets in Korea apply to the factor condition in diamond model. As the demand condition, the dynamic Korean people and growth in demand of the Asian broadcasting program contribute to 'Korean Wave'. Finally, the highly developed communication infrastructure such as broadband plays a important role in 'Korean Wave' as the related and supporting industries. This study examines the Korean cultural industry which is the major competitive factor of 'Korean Wave' with diamond model of Michael Porter. This study shows that the aggressive niche market strategy of Korean company and competitive market environment among cultural companies such as the terrestrial broadcasting companies are major competitive edges as firm strategy and structure factor in diamond model. And lots of manpower related in cultural industry and many traditional and cultural assets in Korea apply to the factor condition in diamond model. As the demand condition, the dynamic Korean people and growth in demand of the Asian broadcasting program contribute to 'Korean Wave'. Finally, the highly developed communication infrastructure such as broadband plays a important role in 'Korean Wave' as the related and supporting industries.

소비자 인식 조사를 위한 질적 연구법: 다소비 횟감의 감각 특성 인식 규명을 위한 Case Study

고정민 ( Jeong Min Ko ),홍재희 ( Jae Hee Hong ) 한국식품위생안전성학회 2016 Safe Food Vol.11 No.3

부하의 변화를 고려한 연료전지 스택 동특성 모델링

高廷旼(Jeong-Min Ko),金鍾秀(Jong-Soo Kim),崔奎英(Gyu-Yeong Choe),康鉉受(Hyun-Soo Kang),李秉國(Byoung-Kuk Lee) 대한전기학회 2009 전기학회논문지 Vol.58 No.1

In this paper, transient voltage response of Polmer Electrolyte Membrane Fuel Cell (PEMFC) stack is analyzed and voltage dynamic characteristic is modeled for optimal design of power conditioning system (PCS). According that the load is changed, the corresponding operating voltage of fuel cell stack is also varied with a certain deep and rising time due to the chemical and mechanical responses. This transient behavior can affect on the operation with respect of PI gain in controller, duty ratio, capacitor of capacitor and so on. So in this paper the detailed theoretical analysis of transient voltage dynamics is explained and the methodology of dynamic modeling is introduced. In addition, the validity and feasibility of the proposed dynamic model is verified by experimental results under various load conditions.