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MANET에서 악의적인 노드의 안전하고 효율적인 검출 방안
이강석,최종오,지종복,송주석,Lee KangSeok,Choi JongOh,Ji JongBok,Song JooSeok 한국정보처리학회 2005 정보처리학회논문지 C : 정보통신,정보보안 Vol.12 No.5
최근 MANET에서의 연구는 보안을 고려한 라우팅 서비스에 주목되어 왔으나 기존에 제시되었던 MANET에서의 악의적인 노드를 식별하는 방안들은 거짓 신고하는 악의적인 노드가 있을 때에는 이를 적절히 식별하고 제거하지 못하는 문제점이 있었다. 따라서 본 논문에서는 신고자와 혐의자 목록으로 구성되는 신고 메시지와 신고 테이블을 이용하여 경로 설정단계에서는 정상적으로 동작하지만 데이터 전달 과정에서는 데이터를 버리거나 내용을 변경시키는 행위, 또는 다른 노드를 거짓으로 신고하는 등의 악의적인 노드를 식별하는 효율적인 방안을 제안한다. 제안하는 방안은 DSR 과 AODV에 모두 적용 가능하다. 또한 성능분석을 위해 AODV와 제안된 알고리즘과 비교 분석하여 제안된 알고리즘이 평균 분실률 및 전송량 측면에서 현격한 성능차이를 있음을 보였다. Lately, the MANET research has focused on providing routing services with security and previous schemes have been proposed for detecting malicious nodes in a MANET. However, they still include some problems which malicious nodes cannot be found when they falsely report other nodes as malicious. Accordingly, we propose a novel and efficient scheme for detecting malicious nodes using report messages and a report table which is consisted of node ID both for suspecting and reporting when the malicious nodes behave normally during the route discovery, but the other hand they drop and modify packets, or falsely report other nodes as malicious during the data transmission. Our proposed scheme is applicable to not only DSR but aiso AODV. And we provide some simulation results of our proposed scheme by comparing general AODV with our proposed scheme. Simulation results show that our Proposed scheme outperforms general AODV in terms of average packet loss ratio and packet delivery ratio.
표준기상년 데이터의 법선면 직달일사량 불확도에 대한 고찰
김신영(Shinyoung Kim),이현진(Hyunjin Lee),김현구(Hyungoo Kim),장길수(Gilsoo Jang),윤창열(Changyeol Yun),강용혁(Yongheack Kang),강주식(Chushik Kang),최종오(Jongoh Choi) 한국신재생에너지학회 2016 신재생에너지 Vol.12 No.S2
Typical meteorological year (TMY) data consist of hourly values of solar radiation and meteorological elements over a 1 year period. This reflects the long term meteorological characteristics because it is derived from a long term meteorological database. The data were produced by applying the Sandia method and weighting factor of National Renewable Energy Laboratory (NREL) by new and renewable energy resource center in Korea Institute of Energy Research (KIER), and it was registered as the qualified reference standards in 2015. The reliability of the solar radiation is important as weighting factor of the solar radiation in the TMY data is 50%. The hourly global horizontal irradiance (GHI) among the solar radiation was provided by Korea Meteorological Administration (KMA), and direct normal irradiance (DNI) was predicted by applying Reindl-2 model. The uncertainty of the DNI is higher than the experimental value as it is a predicted value. The GHI, extra-terrestrial radiation, and zenith angle were surmised as the principal factors of uncertainty. The uncertainty on the zenith angle was highest among the 3 factors. The procedure of the uncertainty evaluation obeyed the guide to the expression of uncertainty in the measurement (GUM). The uncertainty on the DNI of TMY data in Daejeon was calculated and analyzed in this paper.
우루시올-에탄올 수분산 미립자의 자궁경부암세포에 대한 독성효과
김진우,유규은,장홍석,인웅식,최종오,전흥재 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.1
The urushiol-ethanol corpuscle of 320 nM in average particle size was prepared and concentrated by ultra homogenization and centrifugation. The cytotoxic profiles of this particle for use as anti-tumor agent have been evaluated in vitro in cultures of human fibroblasts (MRC-9) and celivical cacinoma cells (CUMC-3). The cytotoxicity assays revealed that the inhibitory effect of 10^(-5)M usushiol-ethanol particle on the growth of MRC-9 was hardly detected, while CUMC-3 dells exhibited over 50% of growth inhibition under the same conditions. In addition, a clear multiple-unit ladder pattern of apoptotic DNA was observed for the urushiol treated CUMC-3 cells. Thus, the results indicated that urushiol inhibited growth of celvical carcinoma cells by inducing apoptosis, which is a mechanism observed with other typical antitumor agents.