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국방전산망의 인터넷 연결을 위한 망구성 방법과 정보보호 정책
배태환,박병권 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1
The existing National Defense Network (NDN) is a closed one that allows no access from outside for information protection. The purpose of this paper is first to propose a solution for opening NDN to Internet to enhance its flexibility, and second to propose the several policies for protecting critical military information from outside, For the first purpose, we suggest that NDN be divided into many elementary networks connected to each other by way of VPN. An elementary network consists of a gateway, a firewal, an IPS (Intrusion Prevention System), a dummy network, and many user computers. In addition, we suggest that there should be a central certification center for certifying data and identifying users. For the second purpose, we suggest some policies about separating service network from other parts of NDN and different data protection categories: ordinary, certified, and encrypted. Tn addition, we suggest that two special teams be organized responsible for information protection and new technology application respectively. To our knowledge, this paper first tried to connect NDN to Internet, and proposed a solution to solve the security problem. We believe that this paper can contribute to the national defense policy for interconnecting NDN with Internet.
박지환(Ji-Hwan Park),배주현(Ju-Hyeon Bae),송민섭(Min-Sup Song),명노신(Rho-Shin Myong),조태환(Tae-Hwan Cho) 한국항공우주학회 2015 韓國航空宇宙學會誌 Vol.43 No.3
탄도수정탄은 기존 포탄의 신관에 카나드가 장착된 조종 장치를 탑재하여 정확도를 향상시키는 지능탄이다. 본 논문에서는 2D 탄도수정탄의 카나드를 설계하기 위하여 다양한 형상 변수에 대한 공력성능을 반실험적 기법을 이용하여 분석하였으며, 이를 바탕으로 초음속에서 항력이 상대적으로 더 적은 카나드 형상을 설계하였다. 또한 CFD 기법을 통한 탄도수정탄의 공력해석 기법을 연구하였으며, 포탄의 탄저 부분 기저항력 예측에 O-type 격자를 바탕으로 한 k-ω SST 난류모델이 적합함을 확인하였다. 최종적으로 앞서 개발한 해석 기법을 바탕으로 2D 탄도수정탄의 공력특성 및 탄도조종장치 장착에 따른 항력변화를 계산하였다. Course correction munition is a smart projectile which improves its accuracy by the control mechanism equipped in the fuze section with canard. In this paper, various aerodynamic configurations of the fuze section were analysed by utilizing a semi-empirical method and a CFD method. A final canard configuration showing the least drag was then determined. During the CFD simulation, it was found that the k-ω SST turbulence model combined with O-type grid base is suitable for the prediction of the base drag. Finally, the aerodynamic characteristics of the smart munition and the change of drag due to the canard installation were analysed.