논문 : 분말야금법에 의한 고분자전해질 연료전지 분리판용 저접촉저항 316L 스테인리스강 복합소재 제조

최준환 ( Joon Hwan Choi ),김명환 ( Myong Hwan Kim ),김용진 ( Yong Jin Kim ) 대한금속재료학회 ( 구 대한금속학회 ) 2008 대한금속·재료학회지 Vol.46 No.12

Metal matrix composite (MMC) materials having low electrical contact resistance based on 316L stainless steel (STS) matrix alloy with ZrB2 particles were fabricated for PEMFC (Polymer Electrolyte Membrane Fuel Cell) separator by powder metallurgy (PM). The effects of the boride particle addition into the matrix alloy on microstructure, surface morphology, and interfacial contact resistance (ICR) between the samples and gas diffusion layer (GDL) were investigated. Both conventional and PM 316L STS samples showed high ICR due to the existence of non-conductive passive film on the alloy surface. The addition of the boride particles, however, remarkably reduced ICR of the samples. SEM observation revealed that the boride particles were protruded out of the matrix surface and particle density existing on the surface increased with increasing the boride content, causing increase of the total contact area between the conductive particles and GDL. ICR of the samples also decreased with increasing the boride content resulted from the increased contact area.

홍콩과 미국에 복수 상장된 중국기업 주식의 정보전이 효과

최준환(Joon Hwan Choi),허흥호(Heung Ho Heur) 한양대학교 아태지역연구센터 2007 중소연구 Vol.31 No.3

중국의 경기변동과 범죄율에 관한 분석

최준환(Joonhwan Choi) 영남대학교 중국연구센터 2017 중국과 중국학 Vol.- No.32

본 연구에서는 선행연구들의 연구 결과들을 기반으로 중국의 범죄율에 영향을 미치는 요인들을 경제 거시적인 측면을 중심으로 경기변동과 범죄율의 비대칭성을 고려하며, 연구 기간을 개혁개방 이후부터 최근까지로 확장하여 분석하고자 한다. 주요 분석 결과는 다음과 같다. 첫째, 1978년부터 2014년까지 전체기간에서는 도시화와 실업률이 통계적으로 유의한 양(+)의 결과를 보여주고 있다. 둘째, 1978년부터 1994년에는 경제성장률과 도시화 그리고 실업률이 유의미한 결과를 보여주고 있는데 반해, 1995년부터 2014년까지의 결과에서는 도시화만이 유일하게 유의미한 결과를 보여주고 있다. 셋째, 1995년부터 2014년까지의 결과에서는 실업률이 유의하지 않은 결과가 나타나고 있으며, 유일하게 도시화만이 유의미한 양(+)의 결과를 보여주고 있다. 넷째, 경제변동에 따라 범죄 발생이 어떻게 비대칭적으로 발생하는지 분석한 결과 경제성장률은 경기회복기와 경기침체기 모두 유의하지 않은 결과가 나타나고 있으나, 실업률은 경기회복기와 경기침체기 모두 유의수준 1%에서 유의한 양(+)의 결과가 나타났으며, 탄력성과 표준화 계수에 의하면 실업률은 경기회복기가 경기침체기에 비해 범죄율 발생에 좀 더 큰 영향을 미치는 것으로 나타났다. In this study, based on the precedent research results, we plan to analyze the factors that affect the crime rate of China, considering the asymmetry between the economic fluctuation and the crime rate, focusing on the economic macroscopic aspect, with expending the research period from the reform opening to the recent. The main analysis results are as followings. First, in the whole period from 1978 to 2014, the urbanization and the unemployment rate show statistically positive (+) results. Second, while the economic growth rate, the urbanization and the unemployment rate show significant results in the period from 1978 to 1994, only urbanization shows meaningful results in the period from 1995 to 2014. Third, while unemployment rate does not show much significant result in the period from 1995 to 2014, only urbanization showed significantly positive (+) result. Fourthly, as a result of analyzing how crime occurs asymmetrically according to the economic fluctuation, economic growth rate showed no meaningful result in both recovery and recession. However, the unemployment rate showed significant level of 1% positive (+) results in both recovery and recession and according to the elasticity and standardized coefficient, unemployment rate has shown to have heavier effect on crime rate in recovery than in recession.

중국 신(新)4대 발명의 경제적 함의

최준환 ( Choi Joonhwan ) 한국외국어대학교 중국연구소 2018 中國硏究 Vol.75 No.-

Recently in China, the term ‘Four New Major Inventions’ has developed. The ‘Four New Inventions’ came from the ancient Chinese ‘The Four Major Inventions’. The four new major inventions are not actually from China. However, they are quickly propagated and commercialized through China’s big market. The four new major inventions are currently leading a change in China and they will become key factors in estimating further change in the future. Therefore, this study has analyzed the economic implications of China’s four new major inventions. The main results are as follows. First, the China’s construction of High Speed Rail has facilitated the traffic and reduced the distance of time and space, which spread out the functions of central city to the surrounding cities and therefore intensifying one city. As a result, the derived cities act as new developing power of China’s economy. Furthermore, the development of high-speed railroad is accelerating China’s conversion as a ‘mass manufacturer’ to a ‘powerful manufacturer.’ Second, the development of mobile payment will ultimately boost China’s Fin Tech industry, while increasing the competitiveness of the related firms through newly designed business models and eventually escalate the global expansion of Chinese companies. Third, Bike sharing will speed up the development of China’s sharing economy and enhance the level of public welfare. This will vitalize the consumption market and act as a positive effect on job creation, such as business establishment, by accelerating various emergence of business models through smart-phone-based sharing economical platform. Furthermore, the data retained from share-bike will reinforce the development of China’s Big Data industry. Fourth, the internet shopping has shown a new consuming trend with the development of new consumer and the expansion of consuming regions. In addition, the growth of the internet shopping will promote the development of New Retail business models that use technology based on the 4th Industrial Revolution, such as big data, artificial intelligence, and robotics.

중국 전통 민간금융의 특징과 역할에 관한 연구 -민간 상호부조 조직인 합회(合會)를 중심으로-

최준환 ( Joon Hwan Choi ) 경남대학교 인문과학연구소 2013 人文論叢 Vol.31 No.-

중국 금융업의 특징은 이원금융체제이다. 정규금융과 비정규금융이 동시에 존재하고 있는 것으로, 비정규금융은 민간금융을 지칭한다. 중국의 민간금융 중 가장 오래되었으며 중요한 조직은 합회이다. 합회의 기원은 대략적으로 당송시대에 시작된 것으로 보고 있으며, 그 형성과 발전 과정에 있어 중국의 도덕체계와 가치 관념이 반영되고 있다. 중국의 전통사회는 농업을 중심으로 하던 사회였고, 지리적으로도 제한을 많이 받던 시기이기 때문에, 당시의 사람들은 혈연관계와 지연관계를 중시하였다. 따라서 이러한 관계에 의존한 안정적인 상호부조관계가 형성되었으며, 이러한 특수한 상황을 기초로 하여 형성된 금융조직이 합회이다. 합회의 근본적인 성격은 유지되고 있지만 경제가 발전하고 시간이 흐름에 따라 그 기능은 변천하였다. 가장 중요한 변화는 생활방면의 자금수요에서 생산방면의 자금수요로 변화하였으며, 참가 주체가 다양해졌고, 자금의 규모 역시 소액에서 거액으로, 금리 역시 저금리에서 고금리로 변화된 것이다. 특히 최근에는 민영 중소기업의 자금 조달 역할을 하면서 중국경제발전에 기여하고 있다는 것이다. China`s financial business structure characteristic is a two-tiered financial system. A two-tiered system means that regular and irregular finance exists at the same time. Irregular finance refers to informal finance. The oldest and most important of China`s informal finance organizations is He-Hui. The origin of He-Hui is reported to have started approximately during the Dang-Song dynasty. Its formation and process of development reflect China`s moral system and values. Chinese traditional society was centered on agriculture. At the time, people thought kinship and acquaintances were very important, because they had a lot of geographical limitations. Therefore, reliance on these relationships, stable mutual assistance was formed. The financial organization that formed on the basis of these special circumstances is He-Hui. He-Hui has maintained its fundamental nature, but, with economic development and the course of time, its function has changed. The most important changes are that capital demand of living area has changed to capital demand of production, and that the main agent of participation has been become diversification. The scale of funding has also changed from smaller amounts to huge funds, and the rate of interest has changed to higher interest rates from lower interest rates as well. Especially in recent years, He-Hui has served a role in financing small business administration, and it has contributed to the development of China`s economy.

1인 가구 공유 주택의 공유 공간 구성 특성에 관한 연구

최준환(Choi, Jun-Hwan),박서준(Park, Suh-Jun),이도훈(Lee, Do-Hun) 한국주거학회 2016 한국주거학회 논문집 Vol.27 No.5

치아임플란트 체결 잔류응력과 풀림 현상에 따른 파손 평가 및 강건한 치아임플란트 모델 개발

최준환(Jun-Hwan Choi),박찬호(Chan-Ho Park),강성욱(Seong-Wook Kang),이용석(Yong-Seok Lee) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11

As the aged population growth in recently, the dental implant is highlighted due to the increased demand of dental implant. However, one of technical problems in dental implant is fracture of dental abutment and fixture. The significant presumption cause of dental abutment and fixture failure is loosening between the abutment and the fixture. In order to quantitatively analyze the reason of dental implant failure in the aspect of mechanical behavior, finite element analysis of dental implant was performed by the different masticating force and loosening conditions. The higher residual stress which occurred at fastening the abutment and the fixture made the higher probability of implant failure. Therefore, we propose a new dental implant model, a wedge-shaped dental implant model, that can prevent loosening between the abutment and the fixture.

플로팅 홀로그램을 활용한 인터랙티브 멀티미디어 콘텐츠 제작 연구

최준환(Junhwan Choi),김준(Jun Kim) 한국디지털콘텐츠학회 2018 한국디지털콘텐츠학회논문지 Vol.19 No.9

Image presentation ways have recently been growing, and hologram, which is one of the next generation image presentation methods, has been developed through a lot of researches, but it is difficult to embody. Therefore, a similar hologram method has been used for different multimedia contents to present the hologram-like effects. This paper intends to investigate ways to effectively use a floating hologram method as one of the pseudo hologram methods to apply to interactive multimedia contents. It also aims to produce works applying a motion sensor to contents of a boxed form using the floating hologram method while studying real-time interaction between sound and image presented from audience’s participation to provide researches on advantages and disadvantages of utilizing hologram and the technology while suggesting complementary methods on them.

지능형 선박의 이기종 통신을 위한 선박 데이터 획득 및 전시 시스템에 관한 연구

최준환(J. H. Choi),장재헌(J. H. Jang),이경창(K. C. Lee) 한국기계가공학회 2023 한국기계가공학회 춘추계학술대회 논문집 Vol.2023 No.12

중국 절강성 지역의 산업클러스터 연구

최준환 ( Joon Hwan Choi ) 한중사회과학학회 2014 한중사회과학연구 Vol.12 No.3

In this study, I mainly analyzed the development factors of industrial cluster which was presented by Brown(2000), about the success factors of the industrial clusters master plan which is enforced as part of the upgrading of industrial structure by China’s Zhejiang Provincial Government. The results are follows. First of all, There is Zhejiang University that has a strong of leading research institutes and because there is formed in the medium which is emphasis on network of scientific researchers and academic paradigm centered on Zhejiang University, it is based on the solid foundation of science. Secondly, industrial atmosphere was formed by commercial experience from the past which has been linked with kin, regionalism and responsible to an important role in the propagation of knowledge and innovative activities. Thirdly, mainly in private enterprises, the number of companies is increasing continuously and many enterprises including “Alibaba” establish a business so, company based for the cluster development has become stronger. Fourthly, sustained reduction in unemployment and an increase in the employment rate refer to creation of employment and pursue new urbanization for attractive residential environment. Zhejiang’s potential of spatial scalability is very high and The work whole of Zhejiang to be networked has been promoted. Finally, although R & D investment is constantly increasing, the progress of private banking legalization have not appeared yet and activities such as venture capital and business angels are also not enough.