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민병길,이도훈 한국융합보안학회 2006 융합보안 논문지 Vol.6 No.4
정보통신시스템에 대한 기술적 보안만으로는 안전한 정보통신시스템 운영을 보장할 수 없다. 따라서, 안전한 정보통신시스템 운영을 위한 정보보안관리시스템(ISMS)에 대한 연구와 표준화가 활발히 전개되고 있다. 우리나라는 2005년 “국가사이버안전관리규정”을 제정하고, “국가사이버안전매뉴얼”의 “보안관리 기준”에 의하여 국가공공기관이 자체적으로 “보안관리수준 평가”를 수행토록 함으로써 체계적인 정보보안관리 활동이 이루어지도록 하고 있다. 본 논문은 관련 표준들과 호주, 미국의 보안관리 체계에 대하여 조사하고, “보안관리수준 평가” 체계를 효율적인 보안관리 측면에서 분석하고, 이를 통하여 “보안관리수준 평가”의 개선방향에 대하여 연구하였다. 기존의 체계에 추가항목(A/C ; Additional Control), 선택적 보안관리 기준(Selective Controls) 구성을 도입하고 평가 준비 절차의 개선을 통하여 각 기관에 최적화된 보안관리 기준을 작성할 수 있도록 함으로써, 기관에 적합한 효율적 보안관리의 수행이 가능하고, 급변하는 정보통신 환경에 유연하게 대응할 수 있도록 하였다. It will not be able to guarantee secure operation for the information and communication systems with only technical security. So, ISMS(Information Security Management System) research and standardization are active going on. Korea published “The national cyber security management regulation” and “The national cyber security manual” in 2005. According to the regulation and manual, the government organ and public institution must accomplish the security management assesment to itself for systematic management of an information security. We studied related standards and security management systems of the Australia and the USA, and analyzed the security management evaluation system in “The national cyber security manual” in efficient management focus. We presented the improvement direction of national security evaluation system through the research. We propose the additional control, selective control set and improvement of the evaluation process for efficient management. Proposed system possible composition of suitable to each organ and flexible adaptation of rapidly changed information environment.
민병길,정영진,김창환,오영세,Min, Byung-Ghyl,Jeong, Young-Jin,Kim, Chang-Whan,Oh, Young-Sae 한국의류산업학회 1999 한국의류산업학회지 Vol.1 No.1
Swelling and fibrillation of two kinds of lyocell, $Tencel^{(R)}$ and $Lyocell^{(R)}$, were investigated using polarizing and scanning electron microscope (SEM). $Tencel^{(R)}$ of a representative lyocell showed that loop tenacity which is related to wrinkle and resilience of fiber does not show significant reduction in wet state. Two kinds of lyocell exhibited surprising degree of swelling in aqueous NaOH solution under free tension. Diameters of $Tencel^{(R)}$ and $Lyocell^{(R)}$ swelled up to 670% and 830%, respectively in the range of around 10% NaOH concentration. Molecular orientation estimated by birefringence also reduced remarkably in alkaline solution. Moreover, diameter and birefringence which changed in alkaline solution did not recovered to original level even after washing and drying. Fibrillation of $Lyocell^{(R)}$ fiber observed by SEM seems to be easier than that of $Tencel^{(R)}$. In order to understand the difference between $Tencel^{(R)}$ and $LyoceJl^{(R)}$, further study on the structure of the two fibers will be followed.
수화용융방사법으로 제조한 PAN/키토산 복합섬유의 특성
민병길,정영진,김창환 한국섬유공학회 2001 한국섬유공학회지 Vol.38 No.10
Composite fiber of PAN and chitosan was obtained by melt spinning the mixture of PAN/chitosan with diluted acetic acid as a plasticizer. Water plasticizes the PAN and acetic acid plasticizes the chitosan. The fiber showed a porous and fibrillar structure which could be converted easily into pulp-like short fibers by pulping. PAN/chitosan pulp showed much higher dye uptake thant powdery chitosan or activated carbon. It is considered that this better sorption capability of the composite fiber results from the relatively large surface area due to its pulp-like state. However, there was no difference in the sorption of heavy metal ions between composite pulp and powdery chitosan.
수화용융체를 이용한 아크릴섬유의 제조와 특성에 관한 연구(I) -폴리아크릴로니트릴 수화용융체의 등온결정화 거동-
민병길,조원호,Min, Byung-Gil,Jo, Won-Ho The Korean Fiber Society 2007 한국섬유공학회지 Vol.44 No.2
Melting and isothermal crystallization behaviors of plasticized polyacrylonitrile (PAN) on adding water in a sealed state were studied. As water was added, the melting point of PAN was depressed sharply to reach a plateau region in which all the nitrile groups of the polymer were hydrated. The crystallization exotherms of PAN/water mixture showed complex profiles. On DSC analysis, it was found that the exotherm from the crystallization (dehydration) heat of the hydrated PAN was overlapped with the latent heats by the neat PAN and water which was not evolved during quenching. Thus, in order to investigate the dehydration kinetics of PAN/water mixture, it was required to separate the exothermic peak by the isothermal crystallization from the peaks by the evolution of latent heats of the each component, i.e., PAN and water. By subtraction of the latent heat contributed by neat PAN and water from the all isothermal exothermic heat of PAN/water mixture, the isothermal crystallization peak of PAN/water mixture was successfully obtained according to various crystallization temperature ($T_c$).