• Journal of Service Research and Studies
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• v.5 no.1
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• pp.91-103
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• 2015

We examine the information transmission between the KT Spot and the KT Futures Index, the SK Telecom Spot and the SK Telecom Futures Index, based on the returns data offered by the Korea Exchange. The data includes daily return data from 1 January 2012 to 31 December 2014. Utilizing a dynamic analytical tool-the VAR model, Granger Causality test, Impulse Response Function and Variance Decomposition have been implemented. The results of the analysis are as follows. Firstly, results of Granger Causality test suggests the existence of mutual causality the KT Futures Index and the SK Telecom Futures Index precede and have explanatory power the KT Spot and the SK Telecom Spot However the results also identified a greater causality and explanatory power of the KT Spot and the SK Telecom Spot over the KT Futures Index and the SK Telecom Futures Index. Secondly, the results of impulse response function suggest that the KT Futures Index show immediate response to the KT Spot and are influenced by till time 4. From time 2, the impact gradually disappears. Also the SKT Futures Index show immediate response to the SKT Spot and are influenced by till time 4. From time 2, the impact gradually disappears. Lastly, the variance decomposition analysis shows that the changes of return of the KT Spot and SKT Spot are dependent on those of the KT Futures Index and the SK Telecom Futures Index. This implies that returns on the KT Spot and SKT Spot have a significant influence over returns on the KT Futures Index and the SK Telecom Futures Index. It contributes to the understanding of market price formation function through analysis of detached the KT Spot and the KT Futures Index, the SK Telecom Spot and the SK Telecom Futures Index.

• Standardization Trend in Telecommunications
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• s.19
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• pp.61-69
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• 1991

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.10a
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• pp.138-141
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• 2001

Recently, xDSL(x Digital Subscriber Line) service has got more and more interest not only in Korea but also all around the world. Many of telecom service companies around the world began to supply ADSL service, a kind of xDSL. And VDSL has been emerging as the next-generation technology of this ADSL. VDSL is very hish bit rate digital subscriber line and the fastest service of xDSL. VDSL is enough to service IP Multicasting, VoD, Broadcast video and etc. which become more important. In this paper we'd like to help making most suitable situation of Internet service by designing this VDSL networks architecture.

• 한국IT서비스학회:학술대회논문집
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• 2007.11a
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• pp.69-74
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• 2007

본 논문은 유비쿼터스 컴퓨팅 환경하에서의 다자간 인터랙티브 스마트 협업 환경기술을 기반으로 하는 미래형 원격협업 애플리케이션이 의료분야에서 어떤 형태의 서비스 BM으로 활용될 수 있는 지와 이러한 서비스 BM을 구현하기 위한 일반적인 프레임워크 구조에 대해 고찰한다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.11a
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• pp.104-107
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• 2006

In this paper, we propose a new framework for to identifying R&D opportunities in aging society. Our framework analyzes megatrend of aging society and then identifies technologies. The framework develops scenarios, creates product/service concept, derives technology theme for identifying specific technologies.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1051-1054
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• 2000

IMT-2000 moving picture messaging service is a primary auxiliary connection service that allows a caller to leave a message when the caller can not complete the call. As the number of service subscriber for wireless communication is dramatically increased, various wireless services as well as simple connection service are requried IMT-2000 moving picture messaging service increases the call completion rate and makes it possible to provide various services.

• Journal of Advanced Navigation Technology
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• v.10 no.2
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• pp.128-137
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• 2006

Recently, the combination of WLAN and 3G wireless technologies will make MMS service more ubiquitous, bringing benefits to both service providers and their customers. To realize seamless MMS service over WLAN and CDMA2000 networks, we design novel seamless interworking architecture by reusing the existing standards and network elements at the same time. Based on the proposed seamless interworking architecture, we also present seamless notification architecture and seamless handover architecture that can't be possible within current MMS reference architecture. This paper will make a contribution for service providers to provide their customers with seamless MMS service over WLAN and CDMA2000 networks.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.5B
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• pp.264-273
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• 2005

Nowadays the integration of heterogeneous wireless networks become a hot issue in communications research area. Especiall,y, 3G and WiBro interworking will be introduced soon as users can be offered the most suitable service according to service area and service providers can reduce network construction and operation expenses. In this paper, we propose an interworking scheme for fast handoff between 3G and WiBro networks. The SCI (Smoothly Coupled Integration) scheme proposed in this paper takes advantages of the existing LCI (Loosely Coupled Integration) and TCI (Tightly Coupled Integration) scheme and can offer seamless services by providing fast handoff between 3G and WiBro although each network may work independently. Through extensive computer simulations using OPNET, the efficiency of the proposed scheme has been validated.

• Knowledge Management Research
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• v.9 no.3
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• pp.173-194
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• 2008

Conventional financial accounting system has overseen the significant roles of the non-financial facets of the activities of the company, especially whose value creating abilities are based on knowledge assets. In the knowledge-based economy, telecommunication service companies must recognize the changes from the tangible assets to the knowledge assets as value creating resources, understand the dynamic processes in which the knowledge is converted to financial profits and seek the method to measure and report knowledge assets to sustain the competitive advantage continuously. This study proposes the indicators and measures of knowledge assets of Korea Telecom. Through the analysis and application of tile knowledge assets report of the Korea Telecom, this study shows the usefulness of the knowledge assets report.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.78-84
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• 2007

UI가 디지털 상품성에 중요한 요인으로 인식되면서 사용성 향상을 위한 기업들의 노력이 커지고 있다. 특히 사용자들의 충성도를 고취시킬 수 있다는 측면에서 일관성 있는 UI개발은 중요한 전략이다. 일관성 있는 UI 개발을 위해 기업은 UI 가이드라인을 개발하여 운영한다. UI 가이드라인은 단순히 좋은 UI 설계만의 문제가 아니며 기업의 사업 전략을 반영해야 하고 기술적인 로드맵을 예상하여야 하며 독자들의 명확하게 이해할 수 있어야 하며 끝으로 배포 이후의 원할한 운영의 문제까지 고려해야 한다. 본 논문은 SK Telecom의 SK Telecom Standard User Interface Requirements 개발 사례를 통해 UI가이드라인 개발 시 고려하여야 하는 사항들에 대한 어떤 해결책을 내놓았는지에 대해서 알아본다.