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성국경,이봉근,윤성일 공주영상정보대학 2001 논문집 Vol.8 No.-
본 논문에서는 전자 상거래를 위해 암호 기술의 확장성 측면에서 우수한 공개키 기반 하부 구조에서의 공개키 인증 기술을 중심으로 분석하였고, 인증기관에서 발급하고 있는 인증서의 기능을 보강함으로써 인증기관의 신뢰도를 높일 수 있는 신뢰성을 강화한 인증 시스템을 설계하였다. 공개키 기반 인증 기술은 전자 상거래 서비스에서 필요한 신분 인증, 거래 내역 인증 및 지불 처리 인증에 사용하는 기반 기술이다. 이는 공개키를 보증하는 기반 기술과 인증서의 안전한 사용 기술 등이 필요하며 전자 상거래를 실현하기 위한 필수적인 선결 사항이다. 인터넷이라는 불안전한 개발형 전산망 구조에서 안전한 전자 상거래를 제공하려면 향후 국제적인 인증 서비스와의 연동을 위한 표준화된 인증 기술의 적용이 중요하다. 현재까지 정보의 공유라는 원칙에서 발전해 온 인터넷은 앞으로 전자상거래나 전자화폐 등이 인터넷상에 등장함으로 인해 정보의 보호라는 새로운 원칙을 바탕으로 발전해 나아갈 것이다. 이러한 정보보호시대에 살아 남기 위해서는 종속적이 아닌 독자적인 암호화 기술과 데이터 인증기술의 개발이 절실하게 필요한데, 여기에 인증국의 중요성이 부각된다. 현재 암호화 기술은 어느 정도 신뢰를 줄 만큼 발전해 있지만 아직까지 데이터 인증을 위한 기반구조가 명확히 성립되어 있지 않은 상태이다. 앞으로 인증국을 기반으로 한 공개키 기반구조 확립이 빠른 시일 안에 이루어 져야 할 것이다.
강성진,김광수,이지현,김종국,김민정 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1
A 21-year-old woman developed painful left third, fourth and sixth nerve palsy. The retro-orbital pain and ophthalmoplegia were improved after steroid pulse therapy. After six weeks, during took steroid by orally left facial weakness developed. Neurologic examination showed left peripheral seventh cranial nerve palsy. The Tolosa-Hunt syndrome associated with facial palsy is rare condition. So we report a case of Tolosa-Hunt syndrome preceded by ipsilateral facial palsy
대전지방 도시단독주택 외부공간 구성요소의 형태에 관한 조사연구
金尙謙,權善國,宋容浩 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.2
This is a study on the formal characters of the gate, fence, court focused on the urban detached houses comparing with traditional houses. The elements-gate, fence, court-affect the space of houses. On the planner's point of view, domestic space should be regarded as a field of human activities. The domestic space is divided into the external and the internal space by exterior wall, the external space is defined by a fence. This study is performed by surveying the type, size, function, height of the elements and comparing them with the traditional elements. The results of this survey are as follows. 1) The gate has a meaning of threshold and also has a symbol of separating. 2) The usual meaning of the fence is to defend from stranger and to enclose space and so on. 3) The court is the internal space and has physical as well as psychological effects.
α-ZnAl₂S₄단결정의 Energy Gap의 온도 의존성에 대한 열역학적 함수 추정
심상흥,심낙순,박종국,오재한,박광호 三陟大學校 1999 論文集 Vol.32 No.1
In this work ? single crystals were grown by the chemical transporting reaction(CTR) method using high purity(6N) elements. The structure of grown ZnAl2S4 single crystals were cubic structure. The optical energy band gap was indirect band gap and the temperature dependence of optical energy gap was fitted well to Varshni equation. Also, the entropy, enthalpy and heat capacity were deduced from the temperature dependence of optical energy gap.
박노국,유성구,서길수,이태진 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2
The sulfidation reaction of calcium carbonate to remove H2S were investigated. Expecially, the effect of polymorphs of calcium carbonate and reaction temperature on the sulfur capture were determined. It was found that calcination reaction of calcium carbonate were influenced by polymorphs of calcium carbonate. The calcination temperatures of aragonite were lower than those of other calcium carbonates. For the sulfidation of calcite with H2S, the effect of reaction temperature on the sulfur capture were not found. But in caes of vaterite and aragonite, the reaction temperature were found to have a significant effect on the sulfidation reaction. From in these results, optimum temperatures of sulfidation reaction using vaterite and aragonite were determined at 800∼850℃ and 750℃, respectively.
유우국,남상륜,강길전 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2
To investigate the effects of hyperstimulation on the reproductive function, such as number of ovulated oocytes, fertilization rate, rate of blastocyst formation, number of survived implanted fetus, and effect on tubal transfer of embryos, ICR mice were injected intraperitoneally with PMSG, 5 IU and HCG, 5 IU and the comparative study with the control group was undertaken. In addition, mouse embryos, i.e., morulas or blastocysts were transferred to pseudopregnant recipient to investigate whether the embryo stge could effect on implantation rate. The results were as follows: 1. The number of ovulated oocytes after hyperstimulation was significantly increased, compared to the control group. The number of degenerated oocytes was also significantly increased. 2. The fertilization rate after hyperstimulation was not significantly different, compared with the control group. 3. The rate of blastocyst formation after hyperstimulation was significantly decreased, compared to the control group. 4. The number of survived implanted fetus was not significantly different with control group. 5. The speed of embryos’ movement in tube was significantly increased after hyperstimulation. 6. The significant loss of embryos was noticed just before implantation in hyperstimulation group. 7. After embryo transfer to recipient mothers, pregnancy rte with blastocysts was significantly increased, compared to pregnancy rate with morulas. This study suggests that hyperstimulation treatment on mice brings about significant loss of embryos just before implantation and its cause seems to be originated from developmental delay of the embryos.