• Journal of Digital Contents Society
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• v.17 no.1
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• pp.59-63
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• 2016

In this paper, we discuss a model for increasing reliability of data through N screen server and client model environment. Our Digital Carousel enables user to share media objects through media synchronization mechanism. We suggest the Digital Carousel system based on CoAP(Constrained Application Protocol) for N-Screen so that the users participated in collaborative work may refer shared media objects as the same view to others. With this sharing system, a group cooperating users can share applications data. This paper explained a performance analysis of a system with function comparison running on multimedia collaboration work based on CoAP and N screen techniques.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.3
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• pp.643-651
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• 1996

In this paper, to provide the possibility of various multimedia services, especially the collaborative work using the centralized control feature of the Service Node, is studied. We focused on the telewriting as the upper layer application to confirm the basic functions of the collaborative work. For this, we implement and add telewriting collaborative work function to the Service Node emulator, and terminals operating in the Windows environment are also developed. Through the tests on the system, we verify the basic functions related to the collaborative work are performed adequately, and confirm the concept of Service Node can support various type of multimedia conference services.

• Journal of Digital Contents Society
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• v.6 no.1
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• pp.79-83
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• 2005

Our Digital Carousel enables user to share media objects through media synchronization mechanism. We implemented the Digital Carousel so that the users participated in collaborative work may refer shared media or error objects as the same view to others. This paper explains the design and implementation of the EC_DXS(Error Control in Digital Carousel System). EC_DCS is a system that is suitable for detecting sharing and recovering software error based on multimedia CSCW(Computer Supportes Cooperated Work). With error sharing system, a group cooperating users can share me. applications. From the perspective of multimedia collaborative environment, an error application becomes another interactive presentation error is shared with participant engaged in a cooperative work.

• The Transactions of the Korea Information Processing Society
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• v.7 no.5
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• pp.1330-1340
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• 2000

Multimedia isn ow applied to various real world areas. In particular, the focus on multimedia system and CSCW(Computer Supported Cooperative Work) has increased. In spite of this current trend, however, the study of fault tolerance for CSCW has not yet fully progressed. We propose EDR_MSCW. It is a system that is suitable for detecting ad recovering software error based on multimedia computer supported cooperative work as DOORAE by using software techniques. DOORAE is a framwork for supporting development on multimedia applications for computer-based collaborative works. When an error occurs, EDR_MCSCW detects an error by using hooking methods in MS-Windows API(Application Program Interface) function. If an error is found, we present a checkpointing and recovery algorithm which has the removal function of the domino-effect for recovering multimedia and CSCW by using stack.

• Journal of Digital Contents Society
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• v.16 no.1
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• pp.123-126
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• 2015

This paper described fault tolerance system running on distributed multimedia. We implemented the error manager service so that the users participated in distribute multimedia collaborative work may refer synchronized error objects as the same view to others. distributed multimedia environment are based on IP-USN(Internet Protocol - Ubiquitous Sensor Network) and M2M(Machine to machine). This is a system that is suitable for detecting, sharing and recovering software error in distribute multimedia CSCW(Computer Supportes Cooperated Work) environment. With error synchronization system, a group cooperating users can synchronize error applications.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.343-345
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• 2005

본 연구에서는 유비쿼터스 서비스를 위한 멀티미디어 공동작업 기반의 흠 네트워크 환경에서 기존 프레임워크에서 없는 웹 페이지와 미디어 등의 프로세스(process) 요소들에 대한 오류를 미리 감지하여 알려주고 오류 공유 시스템을 이용하여 신속하고 정확하게 전달하여서 복구하는데 빠르게 대처할 수 있는 시스템 기능을 제안한다. 본 연구 결과는 사용자들 간의 공통된 웹 기반 문서를 참조하다가 오류 발생 시에 오류 공유 서버의 개념을 도입시키고 이를 통해서 오류 정보를 일치시킨다. 즉, 오류 동기화 기능을 갖는 유비쿼터스 서비스를 위한 멀티미디어 공동 작업 기반 흠 네트워크 환경에서 세션을 잘 유지하기 위하여 오류 동기화를 위한 중요한 토대를 마련하는 시스템을 제공할 것이다.

• Journal of Digital Contents Society
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• v.8 no.4
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• pp.587-592
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• 2007

This paper explains the design and implementation of the EC_NH. EC_NH is a system that is suitable for detecting, sharing and recovering software error based on multimedia CSCW(Computer Supportes Cooperated Work). With error sharing system, a group cooperating users can share error applications. From the perspective of multimedia collaborative environment, an error application becomes another interactive presentation error is shared with participants engaged in a cooperative work. Our Digital Carousel enables user to share media objects through media synchronization mechanism. We implemented the Digital Carousel so that the users participated in collaborative work may refer shared media or error objects as the same view to others.

• Journal of the Korea Society of Computer and Information
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• v.3 no.2
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• pp.29-35
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• 1998

In this paper, the proposed audio/video control device for multiple user in the multimedia platform is changed for the better a disadvantage that must get one computer per participant to process a floor mode needed for interactive collaboration in the multimedia based distance education. It also proposed simulator of co-work environment that included multimedia data. This developed to proceed a multimedia distance education efficiently and sharing a computer among multiple users. Therefore, this is resulting in a reduction the cost needed to build a multimedia distance education system as well as totally simplified the organization of system. It also offers compatibility and generality, interfacing with the printer port of standard PC supporting the bi-direction mode.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.205-208
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• 2005

상호 인지란 상호 작업 이해, 참여자 관계 설정 등 결합이라는 구현 기술을 말한다. 인지의 구현 방법에는 파일 공유, 윈도우 복사, 윈도우 오버레이, 또는 윈도우 공유 등이 있는 데 본 연구에서는 윈도우 오버레이 기능에 세션 제어, 발언권 제어 등을 추가한 윈도우 공유 방법을 기술한다. 본 논문에서는 오류 상호 인지 및 제어 기능이 있는 멀티미디어 공동 작업 환경에서의 소프트웨어 구조에 대하여 기술한다. 그 구조로는 분산 복제형 구조(CARV)이다. 분산 복제형 구조는 중앙 집중형 구조(CACV)와 복제형 구조(RARV) 두개의 장점을 취합한 형태이지만 복제형 구조처럼 완전한 대칭적인 구조를 가지고 있지는 않다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.686-689
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• 2002

본 논문에서는 EJB환경에서의 강의시스템 구현에 관한 논문이다. 이 시스템은 하나는 교수강의시스템을 구현하고, 다른 하나는 수강생 개개의 공동 작업형 환경을 구현함을 목적으로 하고있다. 이 시스템은 기존의 N-tier방식의 클라이언트/서버 방식에서 벗어나 분산 환경에서 작업이 가능하도록 함이 목적이다. 본 논문은 분산환경에서 가장 유용한 언어중 하나인 J2EE를 기반으로 구성하였으며 따라서 이 기종간의 컴퓨터 환경에서도 확장 및 포팅이 용이하고 장차 생길지도 모르는 새로운 요구 사항에서도 대처 할 수 있게끔 함이 주목적이라 할 수 있다.