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Single-Sign-On을 이용한 IPTV 사용자 인증방안
김강(Kang Kim),정종일(J.I. Jeong),송상훈(S.H. Song),신동규(D.K. Shin),신동일(D.I. Shin) 한국정보과학회 2006 한국정보과학회 학술발표논문집 Vol.33 No.2C
DTV는 방송 서비스 운영에 가입자 개념을 추가하여 무료방송 외에 정당한 수신료를 지불하는 사람만이 프로그램을 시청할 수 있도록 하며, 그러한 수익을 이용하여 보다 양질의 서비스를 제공할 수 있게 되었다. 가입자간의 구분을 가능하게 해주기 위한 방법이 제한수신시스템(CAS: Conditional Access System)이다. IPTV는 웹 브라우저를 기반으로 동작하며, 방송 콘텐츠라는 기본 TV기능에서 벗어나 T-commerce, E-commerce 등의 다른 도메인으로 사용자의 요구에 따라 자유롭게 이동하며 사용자인증이 요구되기 때문에 기존의 제한수신시스템으로는 그 기능을 다 하기 힘들어졌다. Single-Sign-On은 사용자가 단한번의 인증을 통하여 추가적으로 인증할 필요가 있는 다른 서비스로의 자동적인 인증을 제공한다. 다수의 사용자가 다수의 서비스를 제공받기를 원하는 IPTV환경에서는 단순한 사용자 인증과 접근제어의 기능을 가진 제한수신시스템과 빈번한 사용자인증의 번거로움을 해결할 수 있는 편의성을 제공하는 SSO의 융합은 필연적이라 할 수 있다. 그러므로 Single-Sign-On은 사용자의 요구에 따라 이동하기 쉬운 IPTV 환경에 매우 적합하다. 이 논문에서는 제한수신시스템, SSO, IPTV에 대해 설명하고 제한수신시스템과 SSO의 기능을 통합하여 IPTV환경에 적합한 새로운 인증방안을 제안한다.
박용구(Park, Y. G.),김주희(J.H. Kim),Ikeda Namiko(N.Ikeda),신동일(D.I. Shin) 한국차학회 2001 한국차학회지 Vol.7 No.1
It has been known that both Korean and Japanese wild tea were introduced from China around AD 800. However, the original population from which they were introduced was not confirmed, yet. We investigated the morphological and genetic variations using RAPD of Korean and Japanese wild tea plants and compared with their genetic differences based on the results. Twenty two superior individuals from 19 wild tea populations of Korea were selected and 19 superior cultivars of Japan were introduced for this study. Seeds collected from 6 wild populations of Korea were planted in Tea Experimental Station in Japan at 1994 and the progenies were compared with 6 year old Japanese wild tea seedlings. Characteristics of leaf morphology of Korean wild tea plants were similar to those of Chinese small leaf variety while Japanese wild tea revealed to be more tolerant to cold. Japanese cultivars have thick leaf that indicates a higher yield. Most conspicuous difference was seen in the flower structure which means a different breeding pattern in Korean and Japanese populations. RAPD results clearly demonstrated the difference between Korean and Japanese wild populations. From the results, we concluded that there are significant genetic differences between Korean and Japanese wild tea populations and, therefore, the original populations from which they were introduced are different.
金成敏,申東一 公州大學校 資源科學硏究所 1998 資源科學硏究論文集 Vol.6 No.-
These studies were carried out to select the varieties for greentea and the cultural practice in Lycium chinense M. at the experimental fields of the Cheongyang Boxthorn Experiment Station. Yuseong-2 had better cultivar for leaf production with 6∼7 times harvesting compared to the Cheongyang nativ. Thenumber of shoots and shoot diameter decreased when plant density was high, but the total number of leaves increased when plant density was low. Leaf length, leaf width, fresh shoot weight, fresh leaf weight, dry shoot weight, and dry leaf weight did not show any significant differences in terms of the plant densities. Leaf production increased significantly in high plant densites. The total number of leaves per shoot and shoot diameter increased proportionally with the ferilizer level. The number of shoots and the number and width of leaves of Yyseong-2 increased proportionally with an increased in fertilizer levels, but no significant differences in the Cheongyang native were found.
金成敏,金是童,申東一,金昌護 公州大學校 資源科學硏究所 1997 資源科學硏究論文集 Vol.5 No.-
This study was carried out obtain the information of the systematic establishment of lady bell culture method from 1994 to 1996. Germination rates of lady bell seeded at May 5, June 5 and July 5 were higher than those seeded at March 5 and April 5. Whereas the growth of upper parts such as height, number of leave, weight, bolting rate, leaf area and the root growth such as root length, diameter, weight and yield were decreased as the seeding date delayed. As the large-size-root were planted, the percent of commercial value that root weight, and yeild of upright above 20g was high. The root length, diameter, weight, and yield of upright planting method were higher than other methods. Root weight and commercial value of root were excellent to the 15x20cm planting density but the highest yield was gained to the 15x10cm planting density.
김윤화,고재욱,김형석,신동일,김인원 한국산업안전학회 1999 한국안전학회지 Vol.14 No.2
This study is to develope the quantitative risk assessment program for consequence analysis of fire and explosion (PML-Chem), which is applicable to the chemical plants. The advantages of PML-Chem is easy to use and acquire results. Especially, PML-Chem was embedded real weather condition database for major chemical plants in ○○ complex in country. Also, reliability of PML-Chem was verified through comparing PML-Chem with PHAST-Professional which is already commercial.