• Journal of the Korean Society for information Management
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• v.25 no.4
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• pp.283-308
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• 2008

In this study, we testify that network structural attributes of a citation network can explain other aspects of journal citation behaviors and the importances of journals. And we also testify various citation impact indicators of journals including JIF and h-index to verify the difference among them especially focused on their ability to explain an institution's local features of citation behaviors. An institutional citation network is derived using the articles published in 2006-2007 by biotechnology faculties of Y University. And various journal citation impact indicators including JIF, SJR, h-index, EigenFactor, JII are gathered from different service sites such as Web of Science, SCImago, EigenFactor.com, Journal-Ranking.com. As a results, we can explain the institution's 5 research domains with inter-citation network. And we find that the co-citation network structural features can show explanations on the patterns of institutional journal citation behavior different from the simple cited frequency of the institution or patterns based on general citation indicators. Also We find that journal ranks with various citation indicators have differences and it implies that total-based indices, average-based indices, and hybrid index(h-index) explain different aspects of journal citation pattern. We also reveal that the coverage of citation DB doesn't be a matter in the journal ranking. Analyzing the citation networks derived from an institution's research outputs can be a useful and effective method in developing several library services.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.122-124
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• 2012

최근 지식정보화 시대의 집단지성기반 교육 패러다임 변화는 큰 이슈로 떠오르고 있다. 특히 융합적 학문을 근원으로 창의성 계발과 아이디어를 중요시하고 있으며, 창조적 교육방식을 지향하고 있다. 그러나 다양한 영역에 지식전문가들과 학습자들 간에 지식을 공유하기 위한 플랫폼 공간이 제대로 제공되고 있지 못하며, 단순한 컨텐츠 제공을 목적으로 이러닝 서비스가 일부 제공되고 있는 것이 현실이다. 따라서 본 논문에서는 집단지성을 기반으로 지능형 튜터링 에이전트 시스템 설계를 제안하고, 새로운 에이전트(Agent) 개념을 통해 지식인들과 학습자들 간에 지식을 공유할 수 있을 뿐만 아니라 새로운 지식을 창출하고, 관리 및 유통할 수 있는 구조를 연구하였다. 또한 사용자들로부터 발생하는 데이터와 정보들을 자동 분석하여 지능적으로 학습상황에 대처할 수 있도록 설계하였으며, 튜터(Tutor)와 튜티(Tutee)간에 협력적인 학습 생태계가 형성될 수 있도록 하였다. 따라서 본 연구의 결과를 기반으로 미래 스마트 학습 플랫폼 발전에 많은 도움이 되길 기대한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11c
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• pp.1637-1640
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• 2003

기존 정보체계는 사용자 요구와 새로운 기술의 도입으로 급속하게 발전하고 있으며, 정보시스템의 재사용성과 확장성, 유지 보수를 위하여 EJB, COM+, CCM 모델 같은 컴포넌트 기술과 컴포넌트 기반 개발 방법론인 CBD 방법론이 연구되고 있다. 또한 이러한 컴포넌트 기술을 이용한 기존 정보시스템의 변환 연구도 같이 이루어지고 있으며, 대표적인 연구로는 미 국방성의 FACELIFT 프로젝트와 카네기멜론 대학 프로젝트 등이 있다. 반면에 현재의 국내 군 정보시스템은 다양한 플랫폼 및 언어 그리고 업무 지향적인 개발로 인해 자원이 낭비되고, 유지보수가 어려운 문제점이 있다. 따라서 본 논문에서는 이미 개발되어 운용중인 군 정보시스템을 분석하여 컴포넌트 기술에 의한 웹 환경으로 변환하는 절차를 제시하고, 클라이언트/서버 구조로 운용중인 군인연금서비스시스템의 일부분을 컴포넌트 기술을 이용하여 웹 환경으로 변환하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06b
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• pp.138-142
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• 2007

컴포넌트 기반 개발 방법론이 지향하는 목표는 독립적으로 개발된 컴포넌트들을 소스 수정 없이 바이너리 형태로 조립하여 소프트웨어를 개발하는 것이다. 그러나 기존 컴포넌트 모델 기반으로 개발된 컴포넌트들은 자신이 제공하는 서비스에 대해서는 그 사용계약을 독자적인 인터페이스를 통하여 정의하는 반면, 하위 컴포넌트와의 연동은 하위 컴포넌트가 정의한 인터페이스에 따르는 코딩을 통해 이루어진다. 이러한 컴포넌트 모델들은 다계층 구조로 개발되고 있는 현대 엔터프라이즈 정보시스템에서 상위 컴포넌트들이 하위 컴포넌트가 정의한 인터페이스에 정적으로 단단히 결합되는 문제점을 갖고 있다. 따라서 하위 컴포넌트에 의존하지 않는 간단한 GUI용 컴포넌트들만 재사용되고 비즈니스 논리를 처리하는 중간 계층 컴포넌트들의 재사용율은 지극히 낮은 실정이다. 본 논문은 하위 컴포넌트가 정의한 인터페이스 규격에 따르는 대신 독자적으로 호출규격을 정의하여 사용하고 이에 대한 메타데이터를 공개함으로써 독립적으로 개발된 바이너리 컴포넌트들간의 연동을 보장하는 새로운 컴포넌트 모델을 제안하고 이 모델에 따라 개발된 컴포넌트들을 조립하는 방법을 제안하였다. 또한 이들을 구현함으로써 이미 개발된 컴포넌트를 실제 소스 수정 없이 바이너리 코드 형태로 조립 가능한 것을 증명하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.2B
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• pp.100-107
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• 2007

Recently, a study of BcN(Broadband convergence Network) is progressing continuously, and it is important to improve the quality of the service according to subscribers because a scale of network is about to be larger. It is more important to manage QoS(Quality of Service) of all subscribers in layer 2 than layer 3 network since managing it in layer 3 network cost both additional processes and large hardware. Moreover, QoS based on Best-Effort service has been developed because tots of subscribers should use limited resource in BcN. However, they want to be supplied with different service even though they pay more charge. Therefore, it is essential to assign the different bandwidth to subscribers depending on their level of charge. The method of current Rate Limiter limits the bandwidth of each port that does not offer fair service to subscribers. The Rate Limiter proposed in this paper limits bandwidth according to each subscriber. Therefore, subscribers can get fair service regardless of switch structure. This new Rate Limiter controls the bandwidth of subscribers according to the information of learning subscriber and manages maximum performance of Ethernet switch and QoS.

• The KIPS Transactions:PartD
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• v.11D no.1
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• pp.123-132
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• 2004

Defense software has short of interoperability due to the vertical development method which is dependent heavily on application area and development environments. In order to prevent from lack of reusability and operability in application domain software development technology needs component concept and makes shift to the trend of domestic software component industry. This paper covers the research topics such as domain analysis and component architecture to improve and extend reusability and inter-operability for defense information system by two approaches, i.e. CBW (Command Based Work flow) analysis and UML components identification.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.36S no.2
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• pp.19-27
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• 1999

This paper propose a contention resolution policy featuring dynamic change of the threshold for the occupancy of the input buffer for an input buffering ATM switching architecture and its hardware implementation strategy. The strategy is provided with the aim of the simple structure that achieves the reduction of the signal path and the power consumption. The threshold is changed dynamically every time slot based both the arrived of cells and the cell service resulting from the contention resolution. The performance on the cell loss of the proposed policy is performed and compared with the conventional policy under the diverse traffic conditions through both the analysis based ont the Markov chain and the simulation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37B no.10
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• pp.877-888
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• 2012

Network virtualization technology is a crucial research issue of Future Internet which pursues a service-oriented architecture so-called NaaS (Network as a Service) or SDN (Software Defined Network). Network virtualization is expected to play an important role in Future Internet researches as a network testbed technology which enables innovative protocols to be experimented independently on a common testbed environment. We propose a control framework in order to provide user defined topology and bandwidth services with network virtualization and to separate and manage multiple-user traffics in a small and medium scale - single domain research network. The proposed framework (VIMS; Virtual network Integrated control and Management System) supports testbed expansions without any changes of heterogeneous virtual network support equipments through accommodation of each equipment's control plane. The framework shows a feasibility through applied to KOREN and we describe the differences and further study directions for improvement the framework comparing with GENI control framework.

• The Transactions of the Korea Information Processing Society
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• v.3 no.2
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• pp.339-347
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• 1996

object-oriented programming is used to develop next-generation telecommu- nications services running on the distributed processing environment. In order to test these services efficiently at the system-level during not only in the development phase but also in the operation phase, we define an embedded monitor service within the infrastructure to monitor the operation of the distributed programs, and describe a system-level test mechanism based on the monitor service. By separating the function of monitor server which monitors operations of objects and collects monitored data and that of tester which makes analysis and decides the sequence of test events, the invasive effect of monitoring can be minimized. At the same time, accurate diagnosis on the system can be achieve by exploiting the test mechanism. The mechanism, as a core component for the implementation of real-time fault-tol-erant systems, is applicable to general-purpose distributeded systems as well.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.41 no.3
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• pp.17-25
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• 2004

Internet Service Subscribers Network has a new role of providing various multimedia services to the home. However, there exist several types of distributed subscriber networks using Asymmetric Digital Subscriber Line (ADSL), Very high-bit rate Digital Subscriber Line (VDSL), and Data Over Cable Service Interface Specifications (DOCSIS). The efficient and concentrated network management of those several distributed subscribers networks with resources requires the general network information model, which has and conceptional managed objects independent of type of network and its equipment to manage the integrated subscriber network. This paper presents the general Internet subscribers network model of the managed object to manage that network in the form of integrated hierarchy. This paper adopts the object-oriented development methodology with UML and designs and implements the integrated subscribers NMS of cable data network and VDSL network as examples of the subscriber networks.