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냉각방법에 따른 모의 방사성폐기물 유리고화체의 특성평가
이강택,류봉기,박종길,이규호,윤덕기,김천우,황태원 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.12
In order to examine and compare the characteristics of two vitrified forms (AG8W1 and DG2) simulated for the operation of a commercial vitrification facility being constructed in Ulchin nuclear power plant, the vitrified forms were cooled by the natural cooling and annealing methods, respectively. And the Product Consistency Test (PCT), compressive strength, thermal conductivity, specific heat, phase stability, softening point and Coefficient of Thermal Expansion (CTE) of the vitrified forms were experimented. Consequently, it was shown that there were no significant differences on the physiochemical properties of the vitrified forms performed the natural cooling and annealing.
유리의 미세구조를 이용한 장기보존형 기록재료에 관한 연구
이강택,윤덕기,진현주,최광훈,이규호,김현규,류봉기,Lee, Kang-Taek,Yoon, Duk-Ki,Chin, Hyun-Ju,Choi, Kwang-Hoon,Lee, Kyu-Ho,Kim, Hyun-Gyu,Ryu, Bong-Ki 한국재료학회 2006 한국재료학회지 Vol.16 No.12
Recently, there are a lot of study to alternate polycarbonate which is being used as storage material in CD, DVD. In this study, we alternated polycarbonate with glass. We observed the change of shape in a surface of the glass which was focused by Nd:YAG Laser. The change of shape and property was studied by thermal mechanical analysis (TMA), UV-Vis spectrometer, AFM and SEM. According to Laser power and quantity of additives, the Bump's size and shape are showed differently. In high energy, the Bump will be transformed into Pit. And also according to CTE, $T_d$ and absorption ratio of glass, difference between Bump and Pit is confirmed. From these investigation, we could control that the minimum size of bump which is more useful shape than pit's is about 1.3 $\mu$m, H 70 nm, and it is near same the spot size.
이강택,이동휘,김귀남,양재수,박상민 한국융합보안학회 2006 융합보안 논문지 Vol.6 No.4
C4I 시스템은 군의 핵심전력이자 중추 신경계이다. C4I 시스템은 정보 그리드, 정보의 생산분배에 사용되는 정보기반체계로 전장공간의 모든 전투요소를 정보 네트워크로 연결하여 실시간 전장정보와 인식의 공유를 가능하게 하여 과거 플랫폼중심의 전쟁개념을 네트워크 중심전(NCW)으로 근본적인 전쟁패러다임변화를 유도하였다. 이러한 군 핵심전력인 시스템이 적의 사이버 공격대상이 될 것임이 자명함에도 불구하고 그 대비책은 거의 부재한 실정이다.본 논문은 전평시 사이버 공격의 핵심목표가 될 C4I 시스템 보호책 마련을 위한 보안 로드맵을 설계하였다. 본 로드맵은 C4I 시스템 보호를 위한 비전과 목표에 대한 지원 프레임워크를 제시하고 있으며, 합참 및 방사청에서 적절한 프로그램을 선정하고 투자하여 신속하고 효율적인 보안시스템 구축이 가능하도록 한다 C4I system is the centerpiece of the military force. The system is an information based system which facilitates information grid, collection of data and dissemination of the information. The C4I system seeks to assure information dominance by linking warfighting elements in the battlespace to information network which enables sharing of battlespace information and awareness; thereby shifting concept of warfare from platform-centric paradigm to Network Centric Warfare. Although, it is evident that C4I system is a constant target from the adversaries, the issues of vulnerability via cyberspace from attack stil remains. Therefore, the protection of C4I system is critical. The roadmap I have constructed in this paper will guide through the direction to protect the system during peace and war time. Moreover, it will propose vision, objectives and necessary supporting framework to secure the system from the threat. In order to fulfill these tasks, enhanced investments and plans from the Joint chief of Staff and Defense of Acquisition and Program Administration (DAPA) is critical; thereby enabling the establishment of rapid and efficient security system.