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이종 분산 클라우드 서비스 브로커리지 환경에서의 사용자 통합 인증 시스템 설계
이대성,Lee, Daesung 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.11
현재 클라우드 시스템은 사업자가 각자의 방식으로 클라우드 환경을 구축함에 따라 클라우드 시스템 간 상호운용성이 떨어져 호환이 되지 않는다. 예를 들어 Google 클라우드를 사용하는 사용자는 별도의 추가적인 로그인하는 과정을 거치지 않으면 MS(마이크로소프트) 클라우드 시스템을 사용할 수 없다. Google 클라우드 사용자가 MS 클라우드 서비스를 이용하기 위해 Google 클라우드 시스템 로그아웃 이후 다시 MS 클라우드에 로그인 하는 과정을 거쳐야 한다. 이러한 문제를 해결하기 위해 CSB(Cloud Service Broker) 기술이 등장하여 클라우드 시스템간의 상호 호환 문제를 해결하고 있으나, 아직도 많은 연구와 개발이 필요한 실정이다. 본 연구에서는 이종 분산 클라우드 환경의 서비스 중재 기술로 등장하고 있는 CSB(Cloud Service Broker) 기술 중에서 클라우드 사용자의 상호운용성의 근본적인 해결 과제인 사용자 통합 인증 시스템을 설계한다. Currently, cloud systems are not interoperable due to low interoperability between cloud systems as operators build up cloud environments with their own way. For example, users of the Google cloud system can not use the Microsoft (Microsoft) cloud system unless they go through an additional log-in process. In order for Google cloud system's users to use MS cloud system services, they must log in to the MS cloud system again after logging out of Google cloud system. In order to solve these problems, Cloud Service Broker(CSB) technology has emerged to resolve the interoperability problem between cloud systems, but many researches and developments are still needed. In this paper, we design an integrated user authentication system, which is a fundamental problem of cloud user interoperability among CSB (Cloud Service Broker) technologies, which is emerging as a service intervention technology of heterogeneous distributed cloud environment.
이대성,Lee, Dai Sung 대한자원환경지질학회 1970 자원환경지질 Vol.3 No.1
The purpose of this report is to prepare a data for the economic evaluation on the Goobong Limestone Mine which is located at the south-eastern corner of the Yongchun Quadrangle scaled in 1:50,000. The accessibility from the mine to railroad was considered in two ways. One is to Dodam Station on Central Railway Line and the other is to reach Songjung-ni village which is near Sangyong Station on Hamback Railway Line. The distance of the former way is 26.7km and the later is 24.2km. Geologically the mine is situated near the base of the Greast Limestone Series which strikes generally $N25^{\circ}{\sim}30^{\circ}E$. The series comprises six different formations from older to younger; Pungchon Limestone Formation and Whajol Formation of Cambrian age, and Dongjum Quartzite Formation, Dumudong Formation, Maggol Limestone Formation and Goseong Formation of lower to middle Ordovician age. 82 samples; 48 from Pungchon Limestone Formation, 11 from Dumudong Formation, 15 from Maggol Limestone Formation and 8 from Goseong Formation, were taken from the series in the crossed direction to the general trend of the series as shown in geological map. They were chemically analyzed on the components of CaO, MgO, $SiO_2$, $R_2O_3(Al_2O_3+Fe_2O_3)$ and ignition loss as shown in table 2, table 3, table 4, and table 5. As seen from the tables, among the formations of the series, middle to upper parts of the Pungchon Limestone Formation and middle and upper parts of the Dumudong Formation have chemical composition as available source for the raw material of cement industry, not only that but also the part of the Pungchon Formation was highly evaluated as source for the flux of iron smelting and the raw material of carbide manufacturing because of its high purity of calcium carbonate.
이대성 명지대학교(서울캠퍼스) 인문과학연구소 2016 인문과학연구논총 Vol.37 No.1
Korean Character Policy of North Korea has begun from a campaign to abolish illiteracy. Although the laborers and farmers had to gain control of the means of production to realize Socialism such as sharing the means of production, they were not able to get the power due to the illiterate. They had a mission for reducing illiteracy rate for settle down the socialist state which is new government that they had never experienced. The main obstacle of decrease of illiteracy rate was Chinese characters. It was impossible to reduce illiteracy rate without leave Chinese characters behind in any way. It was an unavoidable choice to abolish of Chinese characters for founding a system of socialist state. Moreover, a Chinese character symbolizes imperialism and feudalism so there was justified reason to abolish the Chinese characters for establishment of modern nation. The illiteracy rate went down rapidly by virtue of carrying forward the policy of division only using Korean character, there are still many people who cannot get the point of word but only read. So it has been the important thing for refine on Chinese characters what will make or break the policy. On the other hand, it had to be expanded the education of Chinese characters in a situation when it had not utterly gone out. While the policy of abolishing Chinese characters was received a successful evaluation, the New Korean Orthography, the first orthography of North Korea which is extreme formalism and new language characters has not actualized. Kim Du-bong who was in charge of language policy of North Korea right after independence claimed that new six letters to fulfill the formalism. But it had discarded when he encountered downfall. It was an example that language policy success when is supported by not ideal of intellectual class but people’s practical needs.