• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2022.06a
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• pp.1282-1285
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• 2022

기존의 video domain adaptation은 closed set 환경에서 주로 연구되었다. 하지만 이는 source와 target의 label이 같다는 비현실적인 전제를 요구한다. 따라서 본 논문에서는 target의 label space가 source보다 넓은 open set video domain adaptation 문제를 다룬다. 우린 open set image domain adaptation에서 사용되는 방법들을 video로 확장 시켜 모델을 설계하고 UCF to HMDB, HMDB to UCF 와 같은 video dataset에서 실험하였다. 그 결과 source only 대비 UCF to HMDB에서 12%, HMDB to UCF 7.1% 향상된 결과를 얻었다.

• Journal of KIISE:Computing Practices and Letters
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• v.5 no.5
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• pp.619-627
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• 1999

To support multimedia services between network domains with different environments, it is required to map the functionalities in many aspects. In this paper, we implemented interworking gateway which provides protocol conversion and QoS(Quality of Service) adaptation to interwork DAVIC services based on ATM(Asynchronous TRansfer Model )network and Internet AV services. The interworking gateway converts RTSP(Real-Time Streaming Protocol ) message into DSM-CC(Digital Storage Media Command & Control) messages to control the stream that is served in ATM network, and transmits data stream by using RTP(Real-Time Transport Protocol) The interworking gateway provides QoS adaptation functionalities by QoS monitoring and MPEG filtering to meet the variation of network bandwidth.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2005.11a
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• pp.267-270
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• 2005

디지털 방송기술의 발달과 더불어 컴퓨터 및 단말 기술의 발전은 방송콘텐츠에 대한 활용 범위를 증대시키고 있다. 본 논문 에서는 다양한 단말기기에서의 안전한 방송콘텐츠의 이용 및 보호관리를 위한 라이센스 정책 및 관리방법을 제시한다. 제안하는 방법은 수신단말과 단말에 접근이 가능한 사용자 및 디바이스를 하나의 도메인으로 묶고, 각각의 도메인에서의 사용자 및 디바이스 정보를 이용한 다양한 비즈니스 모델에 활용 가능한 라이센스 발급 정책 및 접근 방법을 제시하며, 도메인과 사용정보에 대한 라이센스를 위한 키 관리 방법을 정의한다.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.167-167
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• 2017

유역의 수문학적 변동 특성을 이해하는 것은 미리 자연 재해를 예상하고, 홍수를 통제하여 인간의 삶에 필요한 수자원을 안정적으로 공급할 수 있다. 이러한 특성에 대한 면밀한 조사는 하천 생태계의 구조와 기능을 조절할 수 있기 때문에 반드시 필요하다. 따라서 한반도의 대표적인 다목적 댐 유역에 초점을 맞추고, 일 유입량 자료와 한반도 태풍 영향 도메인을 적용하여 태풍의 영향을 고려하여 정량적인 수문학적 변화 특성을 분석하였다. 또한 남한 총 면적의 약 30%를 차지하고 있으며, 남한 총 수자원의 35%를 공급하고 있는 한강 유역의 대표적인 다목적 댐 유역인 소양강 댐을 대상으로 한반도에 영향을 미치는 태풍과 태풍의 발생에 따른 유출특성변화를 분석하였다. 태풍영향 도메인을 적용하여 태풍유량을 정량화하였으며, 태풍통계 자료와 지역 수문변화 지표의 변화와 상관분석을 통하여 기후변화의 적응과 대책수립에 기초자료를 제공하고자 한다.

• Journal of KIISE:Information Networking
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• v.32 no.5
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• pp.625-632
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• 2005

Recently, real time services have been demanding a lot and the number of mobile devices is increasing extremely. Many researchers are focusing on decreasing handoff or signaling cost, produced when mobile devices are moving around. With these efforts, HMIPv6(Hierarchical Mobile Internet Protocol Version 6) was proposed. Mobile nodes do not need to register their locations to Home Agents whenever crossing over subnets within a MAP domain. In HMIPv6, mobile nodes choose the farthest MAP without considering node mobility pattern. However, a large MAP domain is not always efficient for a slow moving node and required additional work to choose a MAP in HMIPv6. Hence, this paper proposes 'Performance Analysis of HMIPv6 applying adaptive MAP Domain Site'.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.281-284
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• 2004

본 연구는 컴포넌트 재사용을 효과적으로 수행하기 위해 사용자 피드백을 지원할 수 있는 검색 시스템을 제안하였다. 컴포넌트 검색을 위해 퍼지 함수를 이용한 신뢰값을 사용하였으며, 사용자 집단의 요구에 능동적으로 반응할 수 있도록 퍼지 함수를 변화시켜 컴포넌트의 검색 우선순위를 변경시키는 방법을 제안하였다. 컴포넌트의 행위적 특성에 따른 검색은 응용 도메인에 따른 소프트웨어의 재사용에 매우 효과적이다. 본 연구는 후보 컴포넌트들 중 사용자가 어떤 컴포넌트를 선택하느냐에 따라 시스템이 유연하게 반응할 수 있는 적응형 검색 방법이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.11B
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• pp.945-952
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• 2006

In hierarchical mobile IPv6 networks, when an inter-domain handover occurs, mobile nodes suffer from excessive signaling traffic and long handover latency, resulting in possible disruption of ongoing connections. Further, the selection of MAP and its load status critically affect the overall system performance. Therefore, we propose a dynamic MAP selection scheme that seeks to distribute load among MAPs as well as reduces inter-domain handovers. Performance is evaluated from not only an analytic model of average signaling cost but also simulation. The analytical and simulation results show that our proposed scheme improves load distributedness and reduces inter-domain handovers and signaling cost compared to another existing IETF based approach.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.552-556
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• 2004

This paper surveys the design of the adaptive information filtering agents to retrieve the useful information within a large scale database. As the information retrieval through the Internet is generalized, it is necessary to extract the useful information satisfied the user's request condition to reduce the seeking time. For the first, this module is designed by the Rough reduct to generate the reduced minimal knowledge database considered the users natural query language in a large scale knowledge database, and also it is executed the soft computing by the fuzzy composite processing to operate the uncertain value of the reduced schema domain.

• Journal of Broadcast Engineering
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• v.26 no.1
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• pp.3-13
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• 2021

We propose a moire artifacts removal algorithm for screen-shot images using multiple domain learning. First, we estimate clean preliminary images by exploiting complementary information of the moire artifacts in pixel value and frequency domains. Next, we estimate a clean edge map of the input moire image by developing a clean edge predictor. Then, we refine the pixel and frequency domain outputs to further improve the quality of the results using the estimated edge map as the guide information. Finally, the proposed algorithm obtains the final result by merging the two refined results. Experimental results on a public dataset demonstrate that the proposed algorithm outperforms conventional algorithms in quantitative and qualitative comparison.

• Journal of KIISE:Software and Applications
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• v.31 no.8
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• pp.1010-1026
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• 2004

The goal of product line engineering is to support the systematic development of a set of similar software systems by understanding and controlling their common and distinguishing characteristics. The product line engineering is a process that develops reusable core assets and develops a set of software-intensive systems from a common set of core assets in a prescribed way. Currently, many software development technologies are accomplished in context of product line. However, much of the product line engineering research have focused on the reuse of work products relating to the software's architecture, detail design, and code. The product lines fulfill the promise of tailor-made systems built specifically for the needs of particular customers or customer groups. In particular, commonality and variability play central roles in the all product line development processes. These must be treated already during the requirement analysis phase. Requirements in product line engineering are basis of software development just like as traditional system development engineering, and basis of deciding other core assets' property - commonalities and variabilities. However, it is difficult to elicit, analyze and manage correct requirements. Therefore, it is necessary to develop systematic methods which can develop and manage requirement as core asset, which can be stable in anticipative change and can be well adapted to unpredictable change. In this paper, we suggest a method of managing requirements as core asset in product line. Through this method, the reuse of domain requirements can be enhanced. As a result, the cost and time of software development can be reduced and the productivity can be increased.