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김형진,박병선,전성현 한국정보사회진흥원 2005 정보화정책 Vol.12 No.3
IT 환경의 급격한 변화와 소프트웨어 위기 이후 기업의 정보화에 대한 요구는 다양화게 대두되어 왔으며, 최근에는 정보화의 성과가 기대에 미치지 못한다는 불만과 함께 정보화에 대한 투자를 다시 생각해보려는 시각이 일부에서 일고 있다. 이러한 정보화 및 정보화투자에 대한 문제점을 새롭게 해결하려는 노력이 바로 정보기술아키텍처(ITA) 또는 Enterprise Architecture(EA)이다. ITA/EA에 대한 효용성은 미국을 비롯하여 해외 선진국에서 이미 입증되었으며, 현재 국내에서도 ITA/EA에 대한 관심이 날로 높아져 시범사업을 비롯하여 법제화까지 이르게 되었다. 하지만 ITA/EA가 확산되기 위해서는 많은 어려움과 시간을 필요로 하는 것이 현실이다. 향후 국내 ITA/EA 도입 및 활용시 위험부담 최소화와 투자 극대화의 일환으로써 본 연구는 국내 ITA/EA 구축 및 도입기관의 담당자를 대상으로 국내 ITA/EA 도입 환경, 도입 목적, 도입 과정, 도입 결과로 나누어 국내 ITA/EA 도입현황 조사를 통하여 향후 활성화 방안에 대한 연구를 수행하였다.
Kim, Hyoung-Juhn The Membrane Society of Korea 2003 Korean Membrane Journal Vol.5 No.1
1,3,5-Sustitituted polyphenylene type dendrimers were synthesized. The dendrimer was heated in cone. H$_2$SO$_4$ at 120$^{\circ}C$. The reaction mixture was precipitated to ether after simple filtration to get para-sulfonated dendrimer as the chief product. To give mechanical properties to the sulfonated dendrimer, it was partially cross-linked with phenyl ether in the medium of P$_2$O$\sub$5/ and CH$_3$SO$_3$H.
PBI Derivatives : Polymer Electrolyte Fuel Cell Membrane for High Temperature Operation
Kim, Hyoung-Juhn,Lim, Tae-Hoon 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.7
To replace Nafion type perfluorosulfonated polymers, non-sulfonated hydrocarbon-based polybenzimidazole (PBI) derivatives have been prepared for a polymer electrolyte fuel cell (PEFC) membrane. The PBI membranes are easily doped with strong inorganic acid to get proton conductivity. They perform as a PEFC membrane at high temperature (120~200℃) under non-humidified condition. The PBI derivatives are very promising materials for proton exchange membrane fuel cell (PEMFC) and direct methanol fuel cell (DMFC).
Hydrolytic Stability of Sulfonic Acid-Containing Polyimides for Fuel Cell Membranes
Kim Hyoung-Juhn,Litt Morton H.,Shin Eun-Mi,Nam Sang Yong The Polymer Society of Korea 2004 Macromolecular Research Vol.12 No.6
The long-term stability of sulfonic acid-containing polyimides has been investigated. The hydrolytic degradation of homopolyimide and the block copolyimide comprising $27\;mol\%$ of 2,2'-bis(trifluoromethyl)benzidine and $9\;mol\%$ of m-phenylenediamine (BTFMB27mPl0[7/(3+1)]), was quantified through viscosity measurements and FT-IR spectroscopic analyses. The viscosity decrease with respect to time and the degradation rate were similar. The degrees of degradation with respect to time under ambient conditions and at elevated temperature in water were monitored by FT-IR spectroscopy. A new absorption peak was observed at $1786\;cm^{-1},$ which we corresponds to the presence of anhydride end groups formed by hydrolytic scission of the imide rings.
김형진(Kim Hyoung Jin),양경식(Yang Kyung Sik),전성현(Juhn Sung Hyun) 한국IT서비스학회 2006 한국IT서비스학회지 Vol.5 No.3
This study is an approach to solve the problem concerning informatization and its investment of the existing information system. In this regard, IT Architecture is becoming a prominent figure, and great efforts are being taken to establishment of related infrastructure environment such as the 1st and 2nd pilot programs, ITA related law"s legislation, and development of a reference model and its guidance. Especially, with "the bill on the introduction and management of the information system" passing the National Assembly, all sorts of environment involved for the introduction of IT Architecture in the future such as establishment of the political foundation for IT Architecture introduction of public organizations, and integrated IT Architecture management system(G-ITAMS) is establishing the constituency.<BR> Therefore, this study aims to grasp accurately the actual condition concerning the introduction and utilization of IT Architecture at domestic public organizations, which was followed by investigation to present the right direction in the future, and the findings were discussed in the main body as follows:
Periumbilical Perforating Pseudoxanthoma Elasticum
Lee, Mu Hyoung,Sim, Woo Young,Juhn, Bum Jin 대한피부과학회 1999 Annals of Dermatology Vol.11 No.3
Periumbilical perforating pseudoxanthoma elasticum (PPPXE) is a localized acquired disorder found most frequently in obese, multiparous, middle-aged women. It is characterized clinically by yellowish, lax, well-circumscribed, reticulated or cobblestoned patches or plaques in the periumbilical region. Multiparity, obesity, massive ascites, and abdominal surgery are thought to the initiating factors. There is controversy about the etiology of PPPXE. Some authors have classified it as a separate entity from hereditary pseudoxanthoma elasticum (PXE), while others speculate that this condition merely represents a variable expression of PXE in which systemic associations are likely. We report a case of periumbilical perforating pseudoaranthoma elasticum associated with a clinical PXE lesion on the anterior neck.