• Proceedings of the KIEE Conference
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• summer
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• pp.1418-1420
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• 2004

비정형적인 방법에 의해 설계되어진 프로토콜은 불확실성과 오류를 내포하고 있을 수 있으며, 이러한 특성은 프로토콜의 안전성에 매우 심각한 영향을 미치게 된다. 또한 구형되어진 프로토콜 명세에 만족하게 구현되어졌는지를 확인하는 것 또한 프로토콜 엔지니어링에서 매우 중요한 부분이다. 즉, 프로토콜 명세의 정형검정과 적합성 시험은 프로토콜 개발 과정에서 매우 중요한 부분이다. 본 논문에서는 유한상태 레이블 천이시스템(LTS Labeled Transition System)으로 명세화된 철도 신호제어용 프로토콜 Type 1 모델에 대한 적합성 시험을 위하여 프로토콜 제어흐름을 IOFSM으로 모델링하였으며, 이 명세로부터 UIO 방법에 의한 적합성 시험계열 생성방법을 제시하였다. 또한, 프로토콜 검정 및 적합성 시험 방법을 실제 프로토콜의 정확성을 분석하는 데 사용할 수 있도록 프로토콜 검정기와 시험기를Windows 환경하에서 GUI기능에 의해 Window상에 구현되도록 하여 프로토콜 명세의 정확성을 평가할 수 있게 하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.4 no.2
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• pp.71-88
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• 1994

메세지 전달시스템을 이용한 원거리 정보전달이 일반화되고 있다. X.400 메세지처리시스템 및 OSI 보안구조는 보안기능 및 서비스에 대한 표준을 개념적으로 정의하고 있으나, 메세지 전달시스템이 제공하는 보안서비스에 의존하여 중요정보를 송,수신하는 유저는 자신의 보안정책이 준수되기를 원한다. 이를 위해, 메세지 전달시스템과 유저의 독립적 또는 중첩된 2개의 다중 보안정책이 메세지 서버에서 준수되어야 한다. 메세지의 전송 및 프로세싱은 주체와 객체가 지닌 보안레이블이 강제적, 임의적, 마킹, 특권제어의 다중 보안정책에 부합될 때 액세스가 허용된다. 제안된 알고리즘이 메세지 서버에서 보안메카니즘으로 동작될 때, OSI 보안구조와 유저가 요구하는 보안요구조건이 만족됨으로서, 유저의 메세지가 안전하게 전송될 수 있다.

• The KIPS Transactions:PartC
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• v.12C no.3 s.99
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• pp.449-456
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• 2005

Optical burst switching (OBS) overcomes the inefficient resource usage of optical circuit switching and minimizes the optical buffering requirement of optical packet switching. General switch management protocol (GSMP) is an open interface between a label switch and a controller, and it provides connection, configuration, performance, event management and synchronization. GSMP open interface in the OBS network allows the implementation of OBS switch to be simple by separating the data forward plane from the control plane. We defined managed objects to support connection, configuration, performance, and fault management for the management of OBS network in the GSMP open interface. We proposed the network management model, in which the above managed objects are distributed in a controller and an OBS switch according to network management functions. We verified the possibility of connection management using distributed network management model in the GSMP open interface of OBS network by implementing GSMP and network management functions with managed objects of OBS.

• Journal of the Korea Computer Industry Society
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• v.2 no.4
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• pp.417-424
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• 2001

Internet networks consisting of existing routers show the limits in efficiency of traffic managements. In order to overcome the limits, MPLS System is high speed switching technology and is not based on IP address but based on label was designed. However MPLS system being based on ATM has the difficulties of supporting Qos(Quality of Service). This paper suggested the way to consist a service-assured-network using CR-LDP protocol which was designed for guaranteeing QoS in MPLS system being based on ATM switch and using qGSMP protocol, and the way to implicitly establish LSP by implementing QoS Translation and QoS Mapping in LER System.

• Journal of the Korean Society for information Management
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• v.21 no.2
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• pp.127-152
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• 2004

In the current information environment, the concept of a website has been transformed from the repository of information to means of accessing information which can communicate and interact with users. To function well as an accessing tool to information, the information embedded in a website should be organized in a way that users can easily understand the whole informational structure. This aspect of a website might be more important to a university's website. However, the informational structures which current university's websites adopt do not reflect their users' information needs. They construct their structure uniformly, and it causes the decrease of the websites' usability. To solve these problems, this study proposes a new and systematical way of constructing a university's website which can reflect users' information needs and ensure the usability of the websites.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.71-76
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• 2006

핸드폰, 스마트폰, PDA와 같은 모바일 디바이스는 위치, 전화기록, SMS, 사진, 동영상 등 사용자에 관한 다양한 정보를 지속적으로 수집하는데 유용하다. 최근, 모바일 디바이스로부터 수집된 정보를 토대로 개인의 일상을 요약하거나 상위 수준의 행동을 추론하는 등의 서비스를 제공하려는 연구가 진행되고 있다. 본 논문에서는 모바일 디바이스에서 수집된 정보를 검색, 요약, 시각화하기 위한 플랫폼인 라이프 브라우저를 제안한다. 라이프 브라우저는 디바이스에 저장된 개인 정보를 효과적으로 검색할 수 있도록 해주고, 개념 네트워크를 활용하여 개념 검색을 지원하며, 키그래프 기반 정보 요약 기능을 제공한다. 위치 정보의 레이블링을 위해 블록 기반의 Location Positioning Server가 구축되었다. 실제 3명의 사용자를 대상으로 수집한 정보를 라이프 브라우저를 통해 회상해 보는 과정을 분석해 보았고 저수준의 로그 정보를 직접 다루는 것보다 개념 네트워크 기반 라이프 브라우저를 사용하는 것이 유용함을 확인할 수 있었다.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.30 no.4
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• pp.5-27
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• 2019

The purpose of this study is to present the direction of development of menu structure of museum web site through menu structure and content analysis of domestic museum web sites. To this end, menu structure was divided into content areas for 27 national, public, and university museums in Korea and analyzed in terms of organizing system, labeling system, and navigation system, which are components of information architecture. The results of the study suggested continuous management, including hierarchy of appropriate width and depth, use of clear and consistent labels, provision of collection search functions and updating the status of collections, and correction of web site errors, in the direction of development.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.37 no.3
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• pp.93-103
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• 2000

This paper describes Internet multicast routing protocols over MPLS (Multiprotocol Label Switching) networks. Internet multicast routing protocols are divided into 3 categories in terms of tree types and tree characteristics: a shortest path tree, a shared tree and hybrid tree types. MPLS should support various multicast mechanisms because of extremely different IP multicast architectures, such as uni-/bi-directional link, Flooding/prune tree maintenance mechanism, the existence of different tree types with the same group, etc. There are so many problems over MPLS multicast that the solutions can't be easily figured out. In this paper, we make a few assumptions on which the solutions of IP multicast routing protocols over MPLS networks are given. A broadcasting label is defined for the shortest path tree types. Cell interleaving problems of the shared tree types is solved by using block-based transmission mechanism. Finally, the existing hybrid-type multicast routing protocol is reasonably modified to support MPLS multicast.

• Journal of the Korea Convergence Society
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• v.9 no.9
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• pp.177-182
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• 2018

Recently, the use of SNS has been steadily increasing in the 40s and 50s in Korea. In order to increase the number of users in the global service brand, such as Instagram, facing the limit situation of new users, 40 ~ 50 new entrants are needed. However, 40 ~ 50s in Korea are not easily able to use these services because they have difficulties in these services. In this study, usability test is performed in terms of UX / UI about what is difficult for users in 40 ~ 50s to use in instagram, and what is the barriers to entry compared to domestic service The results are as follows. First, when localizing a global service, it is easy to understand, not a simple translation, and proper labeling should be considered. Second, major and frequently used functions should be considered to be intuitive to simplify the depth. Third, the design should be improved to increase the recognition rate of icons in terms of GUI. If possible, the combination of text and icons provided good results.

• The KIPS Transactions:PartC
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• v.10C no.1
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• pp.77-86
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• 2003

This paper describes the new method for Internet multicast routing protocols using MPLS (Multiprotocol Label Switching) networks. Internet multicast routing protocols are divided into three categories in terms if tree types and tree characteristics : a shortest path tree a shared tree and hybrid tree types. MPLS should support various multicast mechanisms because of extremely different IP multicast architectures, such as uni-/bi-directional link, Flooding/prune tree maintenance mechanism. the existence of different tree types with the same group, etc. There are so many problems over MPLS multicast that the solutions can't be easily figured out. In this Paper, we make a few assumptions on which the solutions of IP multicast routing protocols over MPLS networks are given. A broadcasting label is defined for the shortest path tree types. Cell interleaving problems of the shared tree types is solved by using block-based transmission mechanism. Finally, the existing hybrid-type multicast routing protocol is reasonably modified Shortest Path tree type to support MPLS multicast. It has been shown that these modifications give better performance (transmission delay) than the orignal method.