• Journal of Korean Library and Information Science Society
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• v.42 no.2
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• pp.85-103
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• 2011

Bibliographic Network has been a goal about not only to support resource sharing within libraries but also to pursue economic efficiency of cataloging. But nowadays, as resources in diverse media and format have been poured out, printed resources based union catalog should change to new resources finding system which include diverse type of resources. This study analyzes changing factors of bibliographic network and strategies for LC, NII, OCLC, NLA who try to turn over a new service. Finally basis on these findings, suggest task for Korean new generation bibliographic network service which is focused on introducing new collaborating model and developing new resource finding system.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.3A
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• pp.245-253
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• 2010

In this paper, we derive the performance analysis of the coded cooperation over a Rician fading channel. A new scheme called coded cooperation was suggested by using user cooperation and channel codes simultaneously. In previous works, it was verified that the coded cooperation schemes have better performance than other relay schemes in a Rayleigh fading channel. However, the high speed short range indoor wireless communication system has recently attracted research attention and its channel with very high carrier frequency(60GHz) can be typically modeled as a Rician fading channel. We derive analytical outage probabilities and bit error probabilities of the coded cooperation over the Rician fading channel and prove it to have full diversity order.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.322-326
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• 2007

Recently, as construction projects are getting bigger and more complex, the number of participants has been tremendously increased. According to the current trend, the necessity of collaboration design management controlling communication and information exchange among many participants has came up. So this study considers the roles and tasks of each participant and informations that occur in each design stage, and looks into the present status of collaboration in design management of domestic design companies. Finally, the function of collaboration system is drove. It supports tasks of design participants, such as input design outcome, decision making among concerned people and solution of design change and interference.

• 방재와보험
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• s.140
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• pp.30-37
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• 2011

응급 의사소통 시스템(ECS)은 세심한 계획, 설계시공 및 사용이 요구된다. 음성으로 메시지를 전달하는 시스템은 수많은 사용자, 관계당국, 종사자 및 전문가와 관련된 수많은 도전에 직면해 있다. 관련 당사자와 전문가가 결정되고 응급 의사소통 시스템(ECS) 프로젝트의 초기 설계 단계부터 포함되도록 하는 것이 중요하다. 음성 전달 시스템은 통상적인 화재 경보 시스템과는 많이 다르기 때문에, 엔지니어는 새로운 기술을 적용하고 새로운 설계 기법 또는 경험이 있는 새로운 전문가를 찾아 협력해야 한다. 관계 당국과 건물주는 응급 의사소통 시스템(ECS)의 설계에 적극 참여해야 한다. 응급 의사소통 시스템(ECS)의 음성 메시지를 무시하거나 부분적으로만 전달하는 것은 응급 상황 시 음성을 이용한 의사소통의 효과와 품질을 위태롭게 하는 것이다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.18 no.11
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• pp.1254-1261
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• 2007

Mc-OFDM(Multi code-Orthogonal Frequency Division Multiplexing) modulation has been developed for high-speed data transmission over wireless channels. However, this system suffers critical problem from relatively high PAPR(Peak to Average Power Ratio). To reduce PAPR, we suggest a new technique, called Mapping using (N+1)PSK and demonstrate the performance of mapped Mc-OFDM system. On the other side, in OFDM system, each sub-carrier experiences different fading, thus some sub-carriers may be completely lost because of deep fade. To solve a above mention problem, we propose cooperative communications that improve the reliability of sub-carriers through spatial diversity.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.20 no.9
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• pp.890-899
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• 2009

One of major services for the next generation mobile satellite system will be multimedia broadcasting and multi-casting service(MBMS). An integrated satellite and terrestrial network can be considered to provide those services seamlessly and cooperatively. This paper presents efficient cooperative transmission architectures for integrated satellite and terrestrial network. First, an integrated satellite and terrestrial system architectures is introduced, and several cooperative transmission architectures for the integrated system are derived. Extensive performance simulation results reveal that the proposed architectures can improve the system performance and make an efficient transmission.

• Journal of the Korean Institute of Intelligent Systems
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• v.22 no.5
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• pp.590-596
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• 2012

This paper proposes SERO note system which supports collaborative learning between teachers and learners by using the learner's internal and external environment information. The proposed system defines the learner's internal environment depending on desire for relearning assessment questions, and the learner's external environment depending on a percentage of correct answers. The purpose of educational evaluation through SERO typing of each question is reflected in collaborative learning between teachers and learners. As the results of SERO typing of each question are accumulated on DB and used, a variety of feedback chances can be offered to teachers and learners.

• Journal of the Korean Society for Library and Information Science
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• v.43 no.3
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• pp.197-219
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• 2009

The study acknowledges the need for classification systems in arts and cultural education. The study constructs a faceted classification system for this domain based on systematic methods. The study utilized iterative collaboration between domain experts and classification system developers. The classification system consists of 13 main facets and terms. The classification system has values to manage information resources effectively and efficiently. It is also beneficial for reducing cultural gaps in arts and cultural education as well as providing an information gateway for users.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10a
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• pp.557-562
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• 2006

최근 기업환경에서는 분산되어 있는 정보를 통합하여 정보 공유의 필요성이 증가함에 따라 기존 레거시 시스템간의 협업을 하기 위한 상호 운용이 강조되고 있다. 독립적인 레거시 시스템의 상호 연결을 위해서는 플랫폼 이질성, 의미 이질성 등을 극복할 필요가 있다. 이러한 문제를 해결하기 위해 ISO/IEC 11179에서 진행하고 있는 XMDR을 이용하여 미들웨어를 설계하였다. 설계한 미들웨어를 레거시 시스템에 적용하여 데이터 공유 및 통합의 일관성을 유지할 수 있게 되었다. 하지만 설계된 미들웨어는 각 노드의 자원 상황과 작업 상황에 대한 조정기능이 없기 때문에 정보 활용의 효율성을 보장할 수 없다. 따라서 레거시 시스템을 관리하고 조정하는 방안이 필요하다. 본 논문에서는 정보를 요청하는 요청 에이전트와 정보를 제공하는 정보 에이전트간의 정확한 정보 교환을 할 수 있도록 조정하고, 각 레거시 시스템의 정보 모니터링과 작업 분배 및 로컬 노드의 자원 관리를 담당하는 협력 에이전트를 설계함으로써 통합된 정보를 효율적으로 활용할 수 있도록 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.10
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• pp.2237-2246
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• 2010

In this paper, the performance of a RCO-MAC protocol is evaluated using a different traffic model. Data frames are assumed to generate based on an exponential distribution from one source node and then directly to be stored into the input buffer in the source node. System throughput, average access delay and average system delay are used as a performance measure. Performance evaluation is carried out by the computer simulation. Numerical results show that the RCO-MAC scheme offers 18% higher system throughput than the rDCF scheme. In addition, the numerical results show that the RCO-MAC protocol also offers the better average system delay under any traffic load than that by the rDCF scheme, which was not obtained in the previous research due to the saturated traffic model.