• Korean journal of communication and information
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• v.57
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• pp.109-136
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• 2012

This research analyzed the news coverage of controversy over Korean resumption of Wartime Operational Control from the United States in 2006, trying to find various narrative frames and their relevance to the characters of journalistic interpretive communities. Three competitive frames emerged: Self-national defense and peace making, Balance of self-national defense and the Korea-US alliance, and Priority of the Korea-U.S. alliance and national security. Journalistic discourses were also analyzed through the in-depth interviews of 14 journalists from three interpretive communities. The results revealed that competitions of narrative frames reflected the tensed relationship among political power blocs, each representing the liberal, moderate, or conservative camp of Korean society, and preference of journalistic practices such as objective journalism to advocacy journalism. Finally, inferences were made that the clashes among interpretive authorities, existing behind the competition of news frames, restrained public deliberations on a critical incident regarding national security by blocking up the reasoned news coverage of political controversy.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.69-72
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• 2007

DOCSIS 3.0 Protocol is proposed to make the advance of HFC network. In the DOCSIS based network, the upstream frame is divided into contention section reservation section. CMs to have packets send request messages through the contention section. That two or more CMs sends Request message at the same contention slot makes collison. In this paper, are propose the contention section establlish at algorithm considering of channel-bonding mechanism that is the primary technique of DOCSIS 3.0. Results of simulation display better performance int the number of contention slots and the utilization of contention section.

• The Korean Journal of Applied Statistics
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• v.28 no.6
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• pp.1209-1216
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• 2015

Competing-risks events are often observed in a clustered clinical study such as a multi-center clinical trial. We propose a joint modelling approach via a shared frailty term for competing risks survival data from a cluster. For the inference we use the hierarchical likelihood (or h-likelihood), which avoids an intractable integration. We derive the corresponding h-likelihood procedure. The proposed method is illustrated via the analysis of a practical data set.

• The KIPS Transactions:PartC
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• v.11C no.6 s.95
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• pp.787-798
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• 2004

High performance net재rking is one of key factors to provide support for data intensive applications in the Internet. Extended frame size has a major impact on end to-end performance with increasing effective TCP throughput and decreasing system overhead. Most of the research about extended frames has focused on local area network performance and the impact that extended frame size has on the system elements including memory, network interface card and so forth. In the paper, we analyse the effects of the extended frames to the other traffic flows sharing Internet paths for the wide area performance of TCP by conducting various network simulations. Results show that securing available bandwidth in no loss and low delay networks is indispensable to exploit the efficiency of extended frames.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.5
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• pp.995-1002
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• 2018

A Contention Access Period(: CAP) with high contention in priority-based MAC protocols can result in higher number of collisions and retransmissions. High-Priority traffic dominates low-priority traffic during CAP depleting low-priority traffic, adversely affecting WBAN throughput, delay, and energy consumption. This paper proposes a Emergency data-First-Priority MAC(: EFP-MAC) superframe structure that is able to reduce contention in the CAP period, and provides a fair chance for low-priority traffic. As a result, the proposed Emergency data-First Priority MAC(; EFP-MAC) The Simulation results show that the proposed MAC achieves lower energy consumption, higher throughput and low latency than the IEEE 802.15.4 standard.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.6
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• pp.75-87
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• 2009

It is difficult to support QoS service in existing MAC Protocols in Wireless Mesh Network environments. while DCF can not support QoS, EDCA is operated with prioritized channel access method but can not give full performance. This thesis proposes frame management method to support QoS in Multi-Media DCF(MMDCF) MAC Protocol working in wireless mesh network. MMDCF uses ACH phase in TDMA frame to perform selection and elimination. Prioritized phases's count m and Fair Elimination phases's count n determine contention level and make string probability to only one win the contention. Forced TDMA Frame release method can support QoS requirements. MMDCF results good performance and good channel efficiency to support QoS requirements better than EDCA in multimedia stream environments.

• Journal of IKEEE
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• v.13 no.3
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• pp.7-17
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• 2009

WiMedia UWB technology is a fully distributed data communication technology developed for the application demanding a high data transmission rate in the wireless PAN area. In general, devices can send data either by reserving time slots or by using prioritized CSMA/CA. If the PCA protocol of prioritized CSMA/CA is used, they are suffered congestion as the number of devices increases. In this paper, we propose a Deterministic Access Protocol(DAP) in WiMedia WPANs. A DAP is a method to transmit data in the non-reserved DRP period without competition as each device informs the beacon order information in the beacon period and the queue information. In addition, the problem that the devices with a lower beacon slot number have more transmission opportunities is addressed by introducing the reference point. Simulation results are given to demonstrate that a DAP can improve the throughput and reduce the packet loss rate.

• Information and Communications Magazine
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• v.30 no.9
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• pp.72-77
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• 2013

전자정부 표준프레임워크는 공공부문 정보화 사업을 위해서 개발 보급되었으나, 최근 민간부문으로 확대 적용되면서 정부차원의 강제성 없이 자발적으로 오픈 플랫폼 생태계로 진화하기 시작하였다. 또한 전자정부 표준프레임워크는 세계 전자정부 1위의 대한민국에서의 성공적인 안착에 힘입어 개발 도상국을 중심으로 해외로도 확산 조짐을 보이고 있다. 본고에서는 최근 내수 시장의 한계 및 국내 SW 산업 정책이 중소기업 중심으로 이루어지면서 대형 IT서비스 기업들의 해외진출 전략이 공격적으로 전환되고 있는 시점에서 전자정부 표준프레임워크를 중심으로 국내 기업의 장점을 살리면서 단점을 극복할 수 있는 성공 전략에 대해 알아본다.

• Journal of the Korea Safety Management & Science
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• v.11 no.3
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• pp.105-112
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• 2009

오늘날 치열한 글로벌 마켓의 경쟁환경에서 많은 회사들이 제품의 경쟁우위를 확보하기 위해 고객에 대한 빠른 대응과 유연하고 효율적인 새로운 제품을 적기에 개발하기 위한 방법으로 product family 기반의 제품개발과 고객 맞춤형 제품개발 방법을 도입하고 있다. 많은 제품들의 가장 중요한 비즈니스 프로세스 요소는 제품의 전체 라이프 씨이들동안 제품 데이터를 관리하는 것이다. 서로 다른 저장 구조를 가지는 이기종 소프트웨어 시스템에 의해 수집되는 제품 정보는 서로 다른 조직의 정보시스템내에서 인덱싱, 탐색, 정제, 재사용, 분배되는 것이 어렵다. 본 연구에서는 현재의 제품 설계 저장소의 이러한 문제점을 해결하기 위해, 시맨틱 웹 패러다임을 사용하여 product family를 대상으로 지식 관리 프레임워크를 개발하고자 한다. 시맨틱 웹 패러다임의 formal product represention은 제품 플랫폼의 구조를 저장할 수 있고, product family의 서로 다른 부품들을 공용으로 사용할 수 있도록 도와 줄 수 있을 뿐만 아니라, product family 기반의 제품개발과 고객맞춤형 제품개발이 가능하다. 본 연구에서는 일회용 카메라를 대상으로 제안한 프레임워크의 타당성의 입증을 위한 프로토타입을 제시한다.

• Journal of the Korean Society for information Management
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• v.19 no.4
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• pp.349-381
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• 2002

The 21st century survive only who creating, taking, and managing to knowledge. Digital contents industry becomes to the core in the future. That is, to win in a competition have to the digitalizing knowledge contents to all knowledge and information resources. Therefore, it needs to the digital contents management and the distribution framework. This study aims to propose a model stages in the knowledge contents-decision process, KM Matrix, and KMI Score founded on digital contents framework and diffusion of innovation.