OS Security Enhancement System by Considering Security Level

Tai-Hoon Kim,Gil-cheol Park,Seok-soo Kim 보안공학연구지원센터 2007 International Journal of Multimedia and Ubiquitous Vol.2 No.3

Trusted operating systems (OS) provide the basic security mechanisms and services that allow a computer system to protect, distinguish, and separate classified data. Trusted operating systems have been developed since the early 1980s and began to receive National Security Agency (NSA) evaluation in 1984. The researches about trusted OS are proceeding over the world, and new product type using the loadable security kernel module (LSKM) or dynamic link library (DLL) is being developed. Most important concept in this paper is Security Level proposed by Dr. Tai-hoon Kim, because this concept should be considered in every operational environment. This paper assumed security level 1st proposed by Dr. Taihoon Kim, and proposes a special type of product using LSKM and specific conditions for operational environment should be.

A. Camus의 La Femme adulte`re 연구

鄭泰喆 慶北大學校 語學硏究所 1978 語文硏究 Vol.3 No.-

La Femme adultere는 사막 지대의 원주민들과 직접 거래를 하기 위하여 사하라 사막의 내륙 지방으로 판매 여행을 다니는 남편 Marcel을 따라 나선 여주인공 Janine가 어느 날 아침부터 밤까지 직접 목격한 사막의 풍경 묘사가 파노라마식으로 서술되면서 골격을 이루고 있는 가운데 그 사이 사이에 그들의 결혼 생활 그리고 그녀의 내면 세계의 모습이 점철되어 있는 마치 불령 알제리의 프랑스인 소시민 부부의 생활 풍속을 그리고 있는 듯한 극히 단순한 내용의, 그리고 이 모두가 여주인공 Janine의 관점에 의하여 서술된 작품이다.

Polystyrene 이장재가 아말감 변연부 미세누출에 미치는 영향

윤태철,노병덕,이경선 大韓齒科保存學會 1998 Restorative Dentistry & Endodontics Vol.23 No.2

용담댐 운영계획과 금강유황 및 대청댐 저수량의 변화

김태철,문종필,민진우,박승기 忠南大學校 環境問題硏究所 1997 環境硏究 Vol.15 No.-

Yongdam multipurpose dam is under construction to divert a part of Geum riverflow to Mankyung watershed and to supply the domestic water to the Chunju region and produce the hydro-electricity. Generally, construction of dam by the method of inter-regional water transfer affects the quantity and quality of water in the down streams and reservoirs. The impact of operation plan of Yongdam dam on the quantity and quality of water in the Geum river and Daechung dam was investigated. It was recommended that the discharge of water transfer from one watershed to another should be minimized as much as possible.

치근단 병소에서 면역적격세포의 분포에 관한 연구

윤태철,박동수,김진 大韓齒科保存學會 1992 Restorative Dentistry & Endodontics Vol.17 No.1

Periapical lesions are developed as a result of inflammatory response to irritants from root canal system. Clinicians remove these irritants from root canal system and seal the root canal space to induce healing of the periapical lesions. Immunopathologic responses may play an impostant role in development ans progression of periapical lesions ans periapical lesions contain immunocompetent cells. The purposes of the present study were to analys and to compare the distrebution of the immunocompetent cells in the human periapical lesions caaording to the stage of endodontic treatment using indrect immunoperoxdase technique. Obtained 94 human periapical lesions were devided into four groups : Group 1 : no endodontic treatment(28 samples) Group 2 : root canal enlarged and irrigated(28 samples) Group 3 : root canal filied(29 samples) Group 4 : unknown(9 samples) Monoclonal antibodies to examine target cells were UCHL-1 for T lymphocytes(1:200, Dakopatt, Denmark), L26 for B lymphocytes(1:200, Dakopatt, Denmark), OPD4 for heper T lymphocytes(1:200, Dakopatt, Denmark) and alpha-1-antichymotrypsin for macrophages (1:200, Dakopatt, Denmark). The following results were obtained : 1.All the periapical lesions studied were infiltrated by T lymphocytes, plasma cell, B lymphocytes, and macrophages, T lymphocytes were more infiltrated than B lymphocytes, and B lymphocytes and macrophages were less infiltrated than T lymphocytes and plasma cell(P<0.05 : Oneway ANOVA test). 2. In untreated group and canal irrigated and enlarged group of all the periapical lesions, helper T lymphocytes were predominently infiltrated(P>0.05 : Oneway ANOVA test). 3. In canal filled groups of all lesions except periapical cyst, plasma cells were predominently infiltrated. But, in canal filled group of periapical cyst, helper T lymphocytes were the predominent cells(P>0.05 : Oneway ANOVA test). The above results shows that the immunologic responses play important role in pathogensis of periapical lesions and the immunologic response involved undergoes certain changes after endodontic therapy.

프랑스 市民劇(le drame) 生成過程에 對한 考察

鄭泰喆 慶北大學校 師範大學 1974 敎育硏究誌 Vol.16 No.-

董氏鍼을 加味한 治療가 中風患者의 NIHSS와 MBI상의 단기간 기능회복에 미치는 영향

조태성,손인석,김철홍,서정철,윤현민,장경전,송춘호,안창범 동의대학교 한의학연구소 2002 동의ㆍ경산 한의학 학술대회 Vol.6 No.-

Vinblastine Sulfate가 Mouse간장의 인산염 분해효소 활성에 미치는 영향

백태경,박희철,정호삼 한양대학교 의과대학 1987 한양의대 학술지 Vol.7 No.2

Vinblastine sulfate isolated from the vinca has been widely used as an anticancer drug. Vinblastine sulfate inhibits the formation of microtubules which are related to cytoskeleton, transport of molecules and cellular polarity. As a result, it inhibits the mitosis and brings to cellular necrosis. The author undertook the present study to investigate the effect of binblastine sulfate on phosphatase activity in the mouse liver. Albino mice, DDY strain, weighing 2gm were used as experimental animals. The experimental animals were sacrificed at 6, 12, 24, 36 and 48 hours after administration of 12 mg/kg of of vinblastine sulfate. The activity of alkaline phosphatase was observed by Gomori's method and the activity of adenosine triphosphatase was observed by the Wachstein-Meisel's method for histochemical study. The results obtained were as follows: 1. The activity of alkaline phosphatase was slightly increased in the central zone and decreased in the intermediate and periportal zone of the hepatic lobule of the 24 and 36 hours vinblastine sulfate treated groups. In 48 hour-vinblastine sulfate treated group, the activity of alkaline phosphatase was recovered to normal. 2. The activity of adenosine triphosphatase was slightly increased in the hepatic lobule of the 12 and 24 hours vinblastine sulfate treated groups but decreased in the 36 and 48 hour vinbalstine sulfate treated groups. Consequently, it is suggested that vinblastine sulfate cause to decrease the activity of alkaline phosphatase and adenosine phosphatase in mouse liver.

접촉산화수로공법에 의한 수질개선연구

김태철,이규승,오범룡,민진우 忠南大學校 環境問題硏究所 1998 環境硏究 Vol.16 No.-

The effect of non-point source pollution in rural area has much influence on the stream water quality. It is difficult to improve the stream water quality, because of complex pollutant loads technically and because of treatment-cost of the deteriorated water economically. The best way to reduce the non-point source pollution is to check the water quality in the inlet of irrigation channel and control the water quality in the outlet of drainage channel. Stream water quality in the rural area is closely related with the fertilizers, pesticides, and livestock wastewater. Basically the rate of treatment and retention time were estimated for BOD, COD, SS, NH₄-N, T-N, NO₃-N, T-P, PO₄-P using materials such as gravel, crushed stone, useless tire, geotextiles, and concrete block, respectively and also using the combined materials. The rate of treatment for BOD, COD, SS is high, but that for NH₄-N, T-N, NO₃-N, T-P, PO₄-P is low. Optimal retention time in the natural contact channel was 90 minutes.

레이저 5축 경사절단기 개발

주영철,엄태준 순천향대학교 부설 산업기술연구소 2004 순천향 산업기술연구소논문집 Vol.10 No.2

A five-axis laser cutting system has been developed for the solid freeform fabrication system, which makes products by laser cutting, stacking, laminating, and sintering layers. The solid freeform fabrication system uses metal or ceramic powder tapes as well as polymer thin slabs. In order to remove staircase effects at the side of products, the tangent cutting concept is introduced. The laser is fixed in space, and the metal tape on the cutting table is moved in five axes. An X-Y table transfers horizontally the contour at the focal point of the laser beam. A roll and pitch rotation component makes the laser beam irradiate tangentially on the of tape. A z-axis actuator keeps the distance between the lens and tape constant. By this system, the laser beam can be irradiated at any location of the tape with any desired angle.