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이동 에이전트에 대한 신뢰 센터 기반 단방향 엔티티 인증 기법
이기현,노환주,Lee, Gi-Hyeon,No, Hwan-Ju 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.11
Electric commerce system based on distributed mobile on object such as mobile agents need both precise identification and secure authentication scheme on remotemobile entities. In this paper, existing discrete logarithm based Schnorr like entity authentication schemes are improved by the analysis of performance and security on the bi-directional interactive proofs. And ElGamal like schemes are also proposed. Then, there are enhanced with oblivious transfer based mono-directional authentication schemes based on trusted third party for applying to the mobile agent based computing systems. Therefore, proposed schemes provide compatible performance and safety on mobile entity authentication process.
이기현,Lee Ki-Hyun 한국국방경영분석학회 1976 한국국방경영분석학회지 Vol.2 No.1
As the organizational size of a military service or business increases and its management becomes complex, the success in its management depends less on static type of management but more on careful, dynamic type of management. In this thesis, an operations research technique is applied to the problems of determining optimal air traffic control rule and of optimal capacity of air base for a military air base. An airport runway is regarded as the service facility in a queueing mechanism, used by landing, low approach, and departing aircraft. The usual order of service gives priority different classes of aircraft such as landings, departures, and low approaches; here service disciplines are considered assigning priorities to different classes of aricraft grouped according to required runway time. Several such priority rules are compared by means of a steady-state queueing model with non-preemptive priorities. From the survey conducted for the thesis development, it was found that the flight pattern such as departure, law approach, and landing within a control zone, follows a Poisson distribution and the service time follows an Erlang distribution. In the problem of choosing the optimal air traffic control rule, the control rule of giving service priority to the aircraft with a minimum average waiting cost, regardless of flight patterns, was found to be the optimal one. Through a simulation with data collected at K-O O Air Base, the optimal take-off interval and the optimal capacity of aircraft to be employed were determined.
이기현(李基鉉, LEE Ki-Hyun) 신아시아연구소(구 신아세아질서연구회) 2009 신아세아 Vol.16 No.4
스포츠 이벤트의 중요성은 20세기 들어 더욱 확연해졌다. 특히 올림픽 같은 대형 스포츠 이벤트들은 사회문화적 영향력뿐 아니라 정치 경제적으로 다양한 의미를 제공했다. 동아시아 개발도상국들의 올림픽 개최는 경제적 이익창출과 국가발전 혹은 재도약의 기회로 활용되기도 했다. 그러나 이러한 역사적 사실에도 불구하고 개별 국가들이 스포츠 이벤트를 국가건설 과정에서 어떻게 활용했는지에 대한 이해는 상대적으로 부족했다. 이 글은 중국을 사례로 스포츠 이벤트가 어떻게 정치적으로 활용되어 왔으며, 동시에 중국의 대표적 스포츠 이벤트인 베이징 올림픽이 국가의 정치적 도구 혹은 수단으로 어느 정도의 효과를 발휘했는지에 대한 분석을 시도했다. It is no doubt that sports events became important in the 20th century. Especially, Mega-sport-events, such as Olympic games, do not only have a great influence on a society as well as culture, but also reflect various meanings on a country s politics and its economy. Developing counties in East Asia, with the help of holding Olympic Games, both acquired more economic profits and the chance of great national development. In spite of these aspects, we have no sufficient understanding of how each single nation have applied sports events to national constructions. Taking China as an example, this article analyzes how the country made use of sports events politically, and also tries to analyze as a political tool or method, to what extent, Beijing Olympics exerted its function.