• Conservation Science in Museum
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• v.29
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• pp.99-110
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• 2023

The stone fragments that are missing from the stone cultural heritage have limited use beyond being directly fitted to identify their original position, as they are relatively heavy and bulky, and there is the further risk of secondary physical damage during manual work. Therefore, in this study, morphological relationships between the missing parts and the stone fragments were identified through digital restoration, and a three-dimensional (3D) printed replica was created for use at the exhibition for Stone Buddhas in Four Directions in Hwajeon-ri, Yesan, where 72 stone fragments had been excavated together. First, for the digital restoration, stone fragments of similar shapes were selected after the coordinates of the 3D scanning model were aligned in virtual space. In addition, the stone fragments were printed using a 3D printer to check whether they were physically related to the missing parts. Thus, the original positions of a total of nine stone fragments were identified. To utilize these research results in the exhibition, a 1:1 replica of the Stone Buddhas in Four Directions was produced using 3D printing technology, and the nine stone fragments were also restored to their original positions. The digital technology used in this study is of great importance in that it not only made up for the limitations of the direct manual method but also suggested the possibility of expanding its application to the fields of documentation, restoration, and replication of similar cultural heritage.

• Proceedings of the Korea Information Assurance Society Conference
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• 2004.05a
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• pp.181-185
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• 2004

In these days, many reports noticed that the Internet worms spread out and have done considerable damage to all over the world network within a few days. The worms, which is infected from various route such as e-mail, can spread very fast with common property, self replication. But, there is not prepare for the way effectively to interrupt internet worm. Therefore, to prevent our network resource, internet hosts and user clients, the systemic categorization and automatic defense mechanism is required in the Internet worm research. Hence, in this paper, we describe internet worm propagation and defense model.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.442-444
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• 2002

본 논문에서는 멀티미디어 어플리케이션의 핵심인 오디오나 비디오와 같은 연속 미디어에서 hiccup의 발생을 최소화시키기 위한 기존의 연속적인 재생, 재생 요구 이동, 복제, N 버퍼링 기술들의 단점을 보완한 완전 연결 버퍼링 알고리즘을 제안하였다. 제안한 알고리즘은 기존의 재생 요구 이동 기술에서 불균형적인 재생 요구 분포에 따라 야기되는 지연 시간을 최소화시키기 위해 그룹, 버퍼, 디스크 사이에 완전 연결을 통하여 하나의 재생 요구에 대해 전체 디스크를 검색할 수 있는 특징이 있다. 향후 제안된 알고리즘은 구체적인 통계적 모델을 제시하여 다양만 재생 요구의 빈도 수에 따른 검증이 필요하다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.85-87
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• 2002

본 논문에서는 인터넷 상에서의 물품 구입 및 판매 요구를 지원하기 위한 분산 트랜잭션 처리 모델을 제시한다. 가상 공간에서의 트랜잭션 처리를 위해서는 구입 요구와 판매 요구 조건이 부합되어야 한다. 이러한 요구 사향들을 저장하기 위해 지리적인 지역 레벨에 따라 데이터베이스를 사용하고 이들을 DNS의 계층 구조와 비슷하게 연결한다. 또한 각 판매 및 구입 요구 정보를 여러 사이트에 복제 저장함으로써 판매 및 구입 요구가 발생하면 부합되는 구입 및 판매 요구를 검색하는 시간을 줄일 수 있다. 판매 및 구입 요구 정보를 저장하는 방식에 따른 검색 시간에 대한 복잡도를 분석하여 제시하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.520-522
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• 2004

최근 급속히 증가하고 있는 Digital Content의 생성과 활용으로 인해 인터넷 기반의 Digital Content 유통이 활성화 되고 있다. 하지만 URL의 한계와 Content의 불법복제 및 무단변형과 같은 역기능이 나타남으로써 양질의 콘텐트 생산 유통이 저해되고 있다. 따라서 본 논문에서는 URN 기반의 DOI 식별체계와 Digital Content 보호를 위한 PKI 기반의 공개키 알고리즘, 그리고 콘텐트 제공자의 저작권을 보호하기 위한 Digital Watermarking과 DRM기술을 접목한 강인한 Digital Content 유통모델을 제안하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.322-324
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• 2001

분산 환경에서 여러 호스트들간의 자료를 공유하는 것은 네트워크에 부하를 줄이고 가용도를 높일 수 있지만 복제된 공유 자료들의 일치성을 유지하는 것이 필요하다. 전통적으로 분산된 공유자료의 일치성을 위해서 무효화방식(invalidate protocol), 갱신방식(update protocol) 그리고 이주방식(migratory protocol)등이 사용되었다. 분산 환경뿐만 아니라 이동컴퓨팅 환경에서도 분산된 호스트들간에 공유자료의 일치성을 유지하기 위해서 적절한 프로토콜을 선택하는 것은 중요하다. 본 논문에서는 이동 컴퓨팅 환경에 효과적으로 적용 할 수 있는 공유자료의 일치성 유지하기 위한 프로토콜을 제안하고 성능 분석을 하였다.

• Digital Contents
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• no.9 s.88
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• pp.84-91
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• 2000

발명가나 일부 기업들에게만 관심이 있던 특허는 최근에 들어 인터넷 붐을 타고 비즈니스모델이 특허의 논란이 되면서 일반인에게 관심거리로 떠오르고 있다. 이미 수면위로 상승한 세계적인 이슈인 체세포 복제기술은 숱한 뉴스거리를 생산하며 계속적인 이슈로 부각되고 있다. 유념해야 할 점은 좋은 기술을 개발하고도 특허에 대한 무지로 재산권형성에 실패하는 경우가 종종 있다는 것, 뒤늦게 특허 분쟁에 휘말리는 경우 등을 보더라도 현대 기술 사회를 살아감에 있어서 기술개발의 첨병역할을 하고 있는 벤처기업들은 특허법에 대한 숙지가 무엇보다 중요하다고 할 것이다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.4
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• pp.73-80
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• 2016

Multiplayer Online Games(MOG) using the Internet are typically organized based on a CS(client-server) or P2P(peer-to-peer) architecture. We then propose a method that combines a P2P architecture with a CS architecture in order to utilize their advantages. Most MOGs use a primary-copy replication approach that provides strong consistency control over an object. For each object and character there exists an authoritative copy, called primary copy and all other copies are secondary copies or replicas. Any update to the object has to be first performed on the primary copy. In the proposed hybrid architecture, primary copies may reside on the server or be held by clients. In this architecture, load balancing between a server and clients can be achieved by reducing the number of objects maintained by the server. Games consist of various types of actions with different consistency requirements. A multi-level approach to game consistency is sensible as it provides the best trade-off between consistency and performance. The performance for the hybrid game architecture with the primary-copy model is evaluated through simulation experiments and analysis in this paper.

• Journal of KIISE:Information Networking
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• v.28 no.4
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• pp.641-650
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• 2001

In recent years, e-Commerce is very active on the Internet, especially the World Wide Web along with the popularization of Internet using high-speed networks. Especially, Electronic Software Distribution(ESD) is widely being focused as one of the popular researches. However, the existing models of ESD lack substantial illegal copy protection or copyright protection as they have the shortcomings of guaranteeing anonymity of users. This study suggests an ESD protocol that guarantees substantial copyright protection and anonymity based on the Public Key Infrastrncture(PKl). The suggested method does not give the information of a buyer who doesn't want to reveal to a seller, and protects illegal copy and distribution as well. When it happens that illegal copies are in circulation, this method provides a device to trace back its original distributor so that it helps protect the copyright. In addition, it provides more convenient environment to the user by not using the methods of serial number input and extra installation to use.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.1
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• pp.131-137
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• 2014

Although illegal reproduction of cartoon books are prevalent with rapid growth of webhard services and smartphone use, fingerprinting technology for product identification, as seen in music and videos, has not been developed yet. This leads to indiscriminate illegal reproduction of cartoon books, causing great amount of copyright damages from copyright infringement of the rightful owners. The copyright R&D project granted from the Korea Copyright Permission (Project Title: Identification and Copy Protection Technology of Bookscaned Text/Comic Books) has been carried out in order to develop technology to effectively identify illegal reproduction and distribution of scanned cartoon books. The developed technology will contribute to increase of royalty payments and robust ecosystem of cartoon book markets. The study is to propose an enhanced implementation model for identification of scanned cartoon books on the basis of hierarchical symmetric difference feature algorithms adopted from existing feature extraction algorithms for video.