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역할 기반 변동 보안 룰셋 적용을 위한 네트워크 보안 게이트웨이 설계에 관한 연구
이춘재,김온,조기량 한국통신학회 2008 韓國通信學會論文誌 Vol.28 No.a9
본 논문에서는 보안 게이트웨이가 서브넷 상의 단말기의 네트워크 접근 시도 시에 해당 단말기를 자동으로 인식하여 단말기 사용자의 인증 및 접근 제어 보안 룰셋을 기간 데이터베이스와 비교 판별하여 동적으로 조직 내의 역할 기반 접근 권한을 부여, 관리하는 방식에 대해 연구하였다. 덧붙여, 네트워크 관리자가 조직 구조와 관련하여 네트워크 레벨(L2)과 어플리케이션 레벨(L7)의 통합 액세스 제어를 지정할 수 있도록 사용자 중심의 권한 부여 모델을 제시하였다.
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이춘재 大田産業大學校 1994 한밭대학교 논문집 Vol.11 No.0201
An elasitic-plastic fracture toughness test under mixed mode loading was proposed using a single moment, J-intgral of a crack in the specimen is expressed in the form J=J_Ⅰ+J_Ⅱ+J_Ⅲ, where J_Ⅰ, J_Ⅱ, and J_Ⅲ are the component of mode Ⅰ, mode Ⅱ and mode Ⅲ deformation, respectively. J_Ⅰ, J_Ⅱ, and J_Ⅲ can be estimated from M-Θ(M ; bending moment, Θ ; crack open angle), F-U(F ; shearing force, U ; displacement) and T -α(T ; twisting moment, α ; rotational angle)diagram. In order to calculate of J-integral, this paper is used the computer porgram.
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李春載 聖心女子大學校 1984 論文集 Vol.16 No.1
Except for a couple of studies Huttenlocher and Presson (1973, 1979) as well as Harris and Basett (1976), little attempt has been made to investigate mental operations which underlie correct judgment of another's spatial perspective. Huttenlocher and presson (1973) claimed that adults approach the perspective-taking problem in two steps ; first, adults imagine themselves in the position of a hypothetial observer ; second, they mentally rotate the array plus their imagined altar ego until the latter occupies the same position as self. They also proposed that the objects array in perspective-taking tasks is coded as a whole in relation to an overall framework. In 1979, they proposed an alternative view ; an object array is not coded and transformed as a single unit. Rather, the elements in the object array the treated individually. Harris and Basett(1976) suggested that consistent strategies in constructing arrays may be adopted. Typically, the nearest item to a hypothetical observer was placed first. The present experiments repeated in this research examined several strategies children use in solving perspective problems ; a two step, near-distance and an item by item coding strategy. A series of two experiments has been conducted to find out strategies children use in solving spatial perspective-taking problems. Experiments Ⅰ-1, Ⅰ-2, were designed to deal with this issues. In Experiment Ⅰ-1, the experimenters placed the nearest object to the observer at the correct position. In Experiment Ⅰ-2, an instruction was given to younger children to mentally rotate the array. The results of these two experiments showed that children's performance was facilitated. Suggesting that younger children have the competence for executing the second step in solving spatial perspective-taking problems. Experiment Ⅱ examined the dominant strategies older as well as younger children adopt when encoding the spatial array: a unitcoding strategy or an item by item coding strategy. For this purpose, patterns of order in the construction of array were analyzed in a free construction situation. It was found that children do not use a near-preference strategy (i.e., a unit coding strategies) but before-behind and left-right preference strategies (i.e., an item by item coding strategies).
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李春載 카톨릭대학교 성심교정 1996 論文集 Vol.3 No.-
청소년기에 자기개념이 어떻게 변화하는가를 알아보았다. barter의 자기개념 검사를 사용하여 중학교 1, 2, 3 학년과 고등학교 1, 2 학년 1183명의 자기개념을 비교 하였다. 자기개념 9개 영역중에서 학업능력, 사회적 수용, 운동능력, 이성관계, 품행, 우정의 6영역에서, 여자는 중학교2학년, 남자는 중학교 3학년에서 자기개념 점수가 낮아졌다가 다시 높아지는 현상이 나타났타. 청소년기의 자기개념 왜곡현상이 이 시기에 나타나는 것으로 보인다. 전반적인 자기가치감은 학년이 높아질수록 낮아지고, 여자가 남자보다 낮았다.
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혼합모드 하중하에서 연성균열선단의 파괴거동에 관한 연구(Ⅰ)
李春宰 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.2
This paper be examinated a ductility in elastic-plastic fracture for the 3-point and 4-point bending specimen use the material of specimen at the aluminum alloy, there fore, measured deformation of crack tip and propagation of the crack, at the same time, discussed for the parameter of the fracture mechanics governed elastic-plastic fracture. The result is the following. (1) The crack tip was surveyed the behaviour different from crack tip that the other side is acute and the another side is dull to region 4-point bending mixed mode, it contains more component of mode Ⅱ than specimen of the 3-point bending. and the first the stage, a shape of crack surface is equiaxied dimple in the other, since it is equiaxied dimple in all crack surface. (2) In case of specimen at the 4-point bending mixed mode, the wide of critical stretch zone(SZW_c) differ from value at the acuted surface and dulled surface. Accodingly, in this paper total length stretch zone(SZL) is not correspond to ratio of mixed mode and is constant value at a point in time of opening of crack propagation. (3) The relation of J integral and SZL have influnce on small range of ratio of mixed mode. But it have obtained by the finite element method in result that large range of J in- tegral for the value of constant SZL became in large value of J integral as well as large value in mode Ⅱ component.
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이춘재 聖心女子大學校 社會科學硏究所 1994 社會科學硏究 Vol.10 No.-
Abstract This study examined the developmental model of ethnic identity. Phinney's Multigroup Ethnic Identity Measure were given to 302 Korean-American adolescents (37 junior high school, 129 highschool, 136 college students) . There were no signifi- cant age and sex differences. Especially for highschool students, ethnic identity was found to be weaker among those who arrlved at a younger age. It is suggested that highschool age is very important for the development of ethnic identity.
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네트워크 이중 인증을 통한 역할 기반 개방형 네트워크 접근 통제 시스템의 구현
이춘재,조기량,Lee, Chun-Jae,Cho, Ki-Ryang 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.8b
본 논문은 네트워크 기반(L2, MAC ADDRESS)과 어플리케이션 기반(L7, ID/PASSWORD)의 이중 인증 시스템을 구현을 통하여 허용되지 않은 자원과 사용자의 네트워크 접속을 차단할 수 있는 방안을 제시하였다. 인증 게이트웨이 시스템은 중앙 관리 서버로부터 보안/인증 정책을 물려받아 모든 패킷을 허가/차단/제어한다. 사용자의 컴퓨터에 에이전트 없이 모든 클라이언트의 자원(H/W, S/W)을 수집하며 OS 패치 여부 및 바이러스 감염 여부 등을 체크하여 안정적인 네트워크를 운영하고, 침해 사고가 발생한 때에도 신속히 대응 할 수 있는 방안을 제시하였다. 또한 유무선 네트워크의 경우, IEEE802.1x 인증을 요구하는 시스코 NAC에 비해 구축이 용이하고, 비용 절감을 실현할 수 있는 방안을 제시하였다. This paper proposes a method to shut out all of the not certified network access packet by embodying the two-factor(MAC ADDRESS, ID/PASSWORD) authentication system. The Authenticating Gateway System takes over central server's policy and permit or hold up the packet by inherited policy. And checks the whether or not patched the OS version and getting influenced from computer virus. And takes the information about client's resources(H/W, S/W) without Agent in the client. That makes more stability of network operating circumstance and fast facing the attack from hackers. In the fixed mobile network circumstance, This method provides more simplicity and less expenses than IEEE802.1x authentication system(cisco nac).
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