• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.162-164
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• 2007

현재 전국 16개 시도교육청에서는 제작한 대량의 인터넷 동영상을 서비스하고 있으나 제작 인터넷 동영상 콘텐츠의 재사용 및 공동활용을 높이기 위해서는 인터넷 동영상 개발 과정에서 필요한 효율적 콘텐츠 개발 방법과 품질관리를 포함한 콘텐츠 관리가 요구된다. 인터넷 동영상 공동 활용을 위해 다수의 정보저장소를 사용함으로 메타데이터 등록의 중복 작업이 발생하며, 이를 해결하기 위해서는 인터넷 동영상 공동 활용을 위한 시스템적인 연계가 필요하다. 이 논문에서는 인터넷 동영상 콘텐츠의 유통을 위한 인터넷 동영상 메타데이터의 역할과 요건, 그리고 교육정보 메타데이타의 특성을 살펴보고 인터넷 동영상 메타데이타 적용 원칙 및 메타데이타 필수 구성 요소를 도출하였다. 또한 인터넷 동영상 메타데이터의 전국교육정보공유체제 및 사이버가정학습서비스와 효과적으로 연계 하기 위한 모델을 제시한다

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2011.11a
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• pp.353-355
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• 2011

IPTV 서비스는 사업자별로 구성되어 있는 폐쇄적 서비스망에서 VoD 및 방송서비스를 특징으로 하였다. 사업자별 폐쇄성은 사용자의 이용환경의 제약뿐만 아니라 서비스 자원의 이용효율성을 저하시킴으로써, 중복투자 등의 비용적인 부담을 초래하게 되었다. 또한, 다양한 유무선 단말의 수용과 사용자 특성을 고려한 다양한 서비스의 제공요구는 사업자간 또는 서비스 제공자간의 서비스 자원의 상호 공유의 동기를 부여하게 되었다. 이에 본 논문은 오픈 IPTV 서비스 플랫폼에서 제공하는 다양한 서비스 요소들을 융합하여 새로운 융합서비스를 생성하고 제공하는 일련의 구조에 대해 연구하였다. 본 논문에서는 주문형 비디오 서비스를 융합서비스의 예로 삼았으며, 주문형 비디오 서비스를 제공함에 있어, 사용자의 주어진 특성(예를들면, 성별, 연령대 등)에 따른 콘텐츠의 추천을 확장하여, 사용자의 사회적 성향을 반영함으로써, 성별, 연령대에 따른 획일적인 콘텐츠 제공을 극복하고 사용자의 개별적인 성향을 반영하는 콘텐츠 제공방법을 연구하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.383-384
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• 2013

현재 스마트 디바이스 콘텐츠는 각 플랫폼별로 독립적인 프로그래밍 언어와 개발 환경이 존재하기 때문에 다양한 플랫폼에 동일한 콘텐츠를 제공하기위해서는 각 플랫폼에 적합한 방식으로 중복 개발되어야 한다. 스마트 크로스 플랫폼은 이러한 문제점을 해결하기 위한 가상기계 기반 솔루션으로 다양한 개발 언어를 지원하고, 탑재된 모든 플랫폼에 동일한 실행환경을 제공하여 콘텐츠 개발을 용이하게 하고 다른 플랫폼으로의 이식 비용을 절감할 수 있는 장점을 가진다. 본 논문에서는 스마트 크로스 플랫폼에서 Java 프로그래밍언어를 지원하기 위한 컴파일러를 소개한다. 구현된 Java 컴파일러는 Java 콘텐츠를 입력으로 받아 스마트 크로스 플랫폼에서 실행하기 위한 플랫폼 독립적인 스택 기반 가상기계 코드인 SIL을 생성한다.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.861-864
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• 2007

Companies have developed local database without purpose of cooperation with others in the same category. That's because the cooperative work would cause cost in standardization, management, and usage of overlapping data. Therefore this paper proposes a system supporting an dynamic user interface for the sake of convenience of meta-data transformation and its users. The cooperative system will be able to connect companies together and minimize overlapping data by standardizing them. Eventually, the system will have an effect on cost-cutting and improve efficiency of maintenance and management.

• The Journal of the Korea Contents Association
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• v.4 no.4
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• pp.113-121
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• 2004

Existing Cellular IP increases the network traffic load, packet loss and handoff latency because of duplicate packet. In this paper, we propose using a Combined Cache that unites a pasing cache with a routing cache and a Improved Adaptive Semi-soft handoff that minimizes to occur the duplicate packet. As a computer simulation, we consider packet loss, handoff latency and traffic load in network. In proportion the number of nodes, mobile hosts and downlinks of node in access network increased, the proposed method is largely improved in comparison with existing Cellular If that uses semi-soft handoff.

• Journal of Digital Contents Society
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• v.13 no.4
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• pp.567-574
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• 2012

In this paper, we propose a buffering scheme to improve the performance by adaptively adjusting the length of the buffering period according to the degree of data duplication among peers that belong to each specific playback period in P2P live streaming systems. To do so, we first assign all the peers into many groups depending on their playback time positions. We then determine the length of their buffering periods according to the number of peers belonging to each group. That is, we increase the length of the buffering periods when much buffered data are duplicated among peers within a group while we decrease it when few buffered data are duplicated. By simulation experiments, we show that our proposed buffering scheme can improve the performance significantly compared to the fixed length buffering scheme that have been employed in the existing mesh-based P2P systems.

• The Journal of the Korea Contents Association
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• v.11 no.5
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• pp.75-83
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• 2011

Aspect-oriented programming is the paradigm which extracts crosscutting concern from a system and solves scattering of a function and confusion of a code through software modularization. Existing aspect developing method has a difficult to extract a target area, so it is not easy to apply aspect mining. In an aspect minning, it is necessary a technique that convert existing program refactoring elements to crosscutting area. In the paper, it is suggested an aspect mining technique for extracting crosscutting concern in a system. Using abstract syntax structure specification, extract functional duplicated relation elements. Through Apriori algorithm, it is possible to create a duplicated syntax tree and automatic creation and optimization of a duplicated source module, target of crosscutting area. As a result of applying module of Berkeley Yacc(berbose.c) to mining process, it is confirmed that the length and volume of program has been decreased of 9.47% compared with original module, and it has been decreased of 4.92% in length and 5.11% in volume compared with CCFinder.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.883-887
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• 2008

The journal is a important resource of the scholarly communication and it is a kind of the R&D indicator. But the journal subscription cost is rising annually so it has the limits to the journal subscription fee of libraries. This paper analyses the usage of Document Delivery Service(DDS) according to the journal subscription overlapping with NDSL members. In order to select journals for analysis, this paper selects journals of the subscription overlapping top 20% and low 20% and finds out the relationship between the overlapping subscription and usages of DDS.

• KIPS Transactions on Computer and Communication Systems
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• v.7 no.9
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• pp.235-242
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• 2018

Various technologies have been developed to more efficiently share content such as P2P, CDN, and CCN. These technologies take a common approach that content request packets is responded by distributed network nodes or hosts, not by a single content distributor. Such approaches not only resolve network congestion around content distributors, but also make it possible to distribute content regardless of the system and network status of content distributors. However, when receiving content from distributed nodes/hosts, not from authenticated distributors, users cannot practically identify which node/host sent content to them. Due to this characteristic, various hacking caused by the malicious modification of content is possible. Therefore, to make such approaches more secure, a content authentication technique is required. In this paper, we propose a improved operation of MHT used in CCN for authenticating distributed content. Then we evaluate the proposed method by comparing its performance with the existing technology.

• The Journal of the Korea Contents Association
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• v.8 no.1
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• pp.203-211
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• 2008

Due to the advent of presumer and digital production of moving picture, a lot of UCC has been generated by editing the previous moving pictures in various way. It causes a lot of problems on copyright, duplication, and content. In reorganizing the contents, it is necessary to increase productivity and reusability by managing production pipeline systematically through the standardization of moving picture content. For this purpose, we try to develop the moving picture content management system that can manage all kinds of information on the production pipeline, based on SCORM of e-learning by considering production, publication and re-editing. Using the meta-data of content object, user and producer can easily search and reuse the contents. Hence, they can choose the contents object according to their preference and reproduce their own creative UCC by reorganizing and packaging the selected objects. The management of copyright by the unit of scene would solve the problem of copyright. The sequencing technique of SCORM as an interactive storytelling method makes it possible to produce individual contents by user's preference.