• 기록학연구
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• 제82호
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• pp.129-171
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• 2024

본 연구는 아트아카이브에 RiC-CM을 적용하여 동적 기술(Dynamic Description)의 가능성을 탐구하였다. 이를 위해 RiC의 개발 배경과 특징, 그리고 개념 모델(Conceptual Model)을 검토하였으며, 아트아카이브를 구축한 기관의 사례를 분석하였다. 마지막으로 RiC-CM을 활용해 동적 기술 방식을 작성하고, 그 적용 가능성을 평가하였다. 연구 결과, RiC-CM을 통해 아트아카이브의 다양한 맥락과 관계를 표현할 수 있는 가능성을 확인하였으나, 일부 한계점도 도출되었다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2001년도 가을 학술발표논문집 Vol.28 No.2 (2)
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• pp.355-357
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• 2001

본 논문은 MPEG-7을 기반으로 내용기반 검색을 위한 자동화 시스템을 구현하고자 한다. 하위레벨 특징(Low-level feature) 추출에서 DDL(Description Definition Language) 작성까지 자동화 시스템을 설계 및 구현하고, 프로듀서의 입장에서 고려된 고정적인 DS(Fixed Description Scheme)에 대응하는 유동적인 DS(Dynamic Description Scheme)를 이용한 사용자 중심의 개인적인 비디오 검색 시스템 구현을 목적으로 한다.

• 방송공학회논문지
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• 제5권1호
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• pp.82-93
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• 2000

최근 디지털 비디오 데이터가 급격히 증가하고 대중화됨에 따라 이를 활용하기 위한 효율적인 접근 기법이 절실히 요구되고 있다. 비디오 요약(video summarization) 기법은 의미적으로 중요한 요점만으로 전체 비디오를 표현하는 것으로 비디오 내용에 대한 전반적인 개관(overview)을 제공할 뿐만 아니라 브라우징(browsing) 등의 유용한 접근 기능을 제공한다. 본 논문에서는 의미적으로 중요한 내용을 포함하는 비디오 주요구간(highlight segment) 검출을 통한 새로운 동적 요약(dynamic summarization) 기법과 생성된 요약 정보 표현을 위하여 MPEG-7에 제안한 요약 기술구조(DS : Description Scheme)에 대하여 기술한다. 본 논문의 기술구조는 다중 계층의 하이라이트(highlight), 계층적 브라우징, 사용자 주문형 요약 등의 기능을 통하여 비디오의 개관 및 효율적인 브라우징, 네비게이션(navigation)을 가능하게 한다. 또한, 제안하는 비디오 요약 기법 및 요약 기술구조의 실현 가능성 및 기능 구현을 확인하기 위하여 축구 비디오에 대한 적용 실례를 제시한다.

• 대한산업공학회지
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• 제11권2호
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• pp.113-129
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• 1985

The purpose of this study is to provide a System Description Algorithm based on the need to describe the system more systematically than the System Dynamics does. The algorithm, which comprises 14 steps, is described in detail and demonstrated through an example of the dynamic market networks.

• Journal of Information Processing Systems
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• 제7권2호
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• pp.287-298
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• 2011

Efficient service description and modeling methodologies are essential for dynamic service composition to provide autonomous services for users in ubiquitous computing environments. In our previous research, we proposed a 'u-service' ontology which is an abstract and structured concept for device operations in ubiquitous environments. One of the problems that we faced during the design process was that there are not enough standards to analyze the effectiveness of a u-service ontology. In this paper, we propose a quality evaluation model to facilitate the design process of a uservice ontology. We extract modeling goals and evaluation indicators based on the uservice description specification. We also present quality metrics to quantify each of the design properties. The experiment result of the proposed quality model shows that we can use it to analyze the design of u-service ontology from various angles. Also, it shows that the model can provide a guideline, and offer appropriate recommendations for improvements.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권4호
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• pp.491-508
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• 2010

In peer-to-peer (P2P) on-demand streaming networks, the alleviation of server load depends on reciprocal stream sharing among peers. In general, on-demand video services enable clients to watch videos from beginning to end. As long as clients are able to buffer the initial part of the video they are watching, on-demand service can provide access to the video to the next clients who request to watch it. Therefore, the key challenge is how to keep the initial part of a video in a peer's buffer for as long as possible, and thus maximize the availability of a video for stream relay. In addition, to address the issues of delivering data on lossy network and providing scalable quality of services for clients, the adoption of multiple description coding (MDC) has been proven as a feasible resolution by much research work. In this paper, we propose a novel caching scheme for P2P on-demand streaming, called Dynamic Buffering. The proposed Dynamic Buffering relies on the feature of MDC to gradually reduce the number of cached descriptions held in a client's buffers, once the buffer is full. Preserving as many initial parts of descriptions in the buffer as possible, instead of losing them all at one time, effectively extends peers’ service time. In addition, this study proposes a description distribution balancing scheme to further improve the use of resources. Simulation experiments show that Dynamic Buffering can make efficient use of cache space, reduce server bandwidth consumption, and increase the number of peers being served.

• 한국정보통신학회논문지
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• 제16권3호
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• pp.476-481
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• 2012

최근 QoS/QoE 기술의 일환으로 HTTP에 기초한 적응적 스트리밍 기술이 주목받고 있다. 이에 본 논문에서는, HTTP에 기초한 동적 적응적 스트리밍 기술에 대해 알아본다. 이를 기반으로 HTTP상에서 동적 적응적 스트리밍 시스템을 설계 및 구현 하였다. 이 시스템은 MPEG2-TS 파일의 비트율별 변환, Segment 분할, MPD(Media Presentation Description)의 생성과 서버와 클라이언트 간의 동적이고 적응적인 네트워크 환경에서 MPD File의 분석을 통한 비트율별 플레이어로 구성된다. 이는 다양한 네트워크 환경에서 지속적이고, 원활한 영상의 재생을 위해 다양한 멀티미디어 분야에 활용될 것이다.

• Korean Journal of Geomatics
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• 제3권1호
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• pp.23-32
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• 2003

Rigorous sensor and dynamic modeling techniques are required if spatial information is to be accurately extracted from video imagery. First, a mathematical model for an uncalibrated video camera and a description of a bundle adjustment with added parameters, for purposes of general block triangulation, is presented. This is followed by the application of invariance-based techniques, with constraints, to derive initial approximations for the camera parameters. Finally, dynamic modeling using the Kalman Filter is discussed. The results of various experiments with real video imagery, which apply the developed techniques, are given.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
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• pp.95-99
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• 2001

Frequency is the unique physical value for all the interconnected systems. Therefore. the load frequency control is in the responsibility of all members in the interconnection power unbalance in one of the interconnected system can cause the problems in others. In the following text a brief description and the role of frequency in an interconnected system will be presented. Following is the short description of the Balkan Interconnection (UCTE Second Synchronous Zone) with schematic diagram. A Power-Frequency (P-f) dynamic model of a control area wil1 be shown. Model gives the analytical solution for frequency change versus a time after outage of a generator in the power system. This model will be applied to the Balkan Interconnection and compared with numerical approach. Advantages and drawbacks of the analytical method will be discussed Purpose of using this model is to investigate if the pumps in reversible hydropower plant will be underfrequency shed after the outage of the biggest generator unit in the interconnection, according %o (n-1) security postulate.

• 한국문헌정보학회지
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• 제44권4호
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• pp.115-130
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• 2010

In the archival field, the last decade has witnessed much discussion on archives' broad responsibilities for social memory. Considering that the social role of archives has stemmed from postmodern thinking suggests a paradigm shift from viewing archives as static recorded objects to viewing them as dynamic evidence of human memory. The modern archives and archivists are products of nineteenth-century positivism, limiting their function to archiving written documents within stable organizations. The new thoughts on the social role of archives provide a chance to realize that traditional archival practices have preserved only a sliver of organizational memory, thus ignoring fluid records of human activities and memory. Archival description is the primary method for users to access materials in archives. Thus, it can determine how archival materials will be used (or not used). The traditional archival description works as the representation of archival materials and is directly projected from the hierarchy of organizational documents. This paper argues that archivists will need to redefine archival description to be more sensitive to atypical types of archival materials from various cultural contexts. This paper surveys the postmodern approaches to archival concepts in relation to descriptive practices. It also examines some issues related to representing historically marginalized groups in archival description who were previously neglected in traditional archival practices.