• Journal of the Korean Society for information Management
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• v.9 no.1
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• pp.182-216
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• 1992

It is described about the construction of Union Bibliographic Database for online shared cataloging and its perspectives in the Dae-duck Science Park technical information centers and libraries.

• Journal of KIISE:Computing Practices and Letters
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• v.10 no.6
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• pp.472-483
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• 2004

Many metadata registry management systems have been developed, which are based on ISO/IEC ll179. However, they do not follow the international standard, ISO/IEC ll179 nor provide some of mandatory functions. It is difficult to a develop metadata registry management system for domestic environment because of their hidden implementations. The goals of this paper are to solve the problems of the existing systems and to develop a metadata registry management systems for accumulation of primitive technologies. This paper also shows the metadata registry building process for the science and technology information field using the developed system. This system consists of Metadata Registry Layer, Core Component Layer, Extension Layer, and Service Interface Layer. The developed metadata registry management system follows ISO/IEC ll179 and contains mandatory functions for practical use. Therefore, it can be used as a guideline for building metadata registries and a development process of metadata registry management systems. We can easily reuse its components for development of metadata registry management systems in various fields because the system is designed and implemented based on the component-based development methodology. It also decreases time and cost for developing systems.

• Journal of the Korean Society for information Management
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• v.11 no.1
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• pp.103-124
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• 1994

In an age of fierce global trade-war, the importance of sdenbfic and technologd advancement is clearly rmgruzed and, as a result., the flow of information from develaped countries is get- more restricted. Thus, the e s t a b h e n t of systematic data bdd-up is needed to improve the international com~tivenes of Korean prcducts when the trend of weapnizlng hl-tech know-how's is intensified. This paper demonstrates k c requirements for database bdd-up through analysis of evaluation cnteria, difficulties in management, data clasiKcalion. Structure and procedure of database of thermodynarmc property of new rnatmak is described.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.9
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• pp.563-573
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• 2006

Cyber-infrastructures for scientific and engineering applications require integrating heterogeneous legacy data in different formats and from various domains. Such data integration raises challenging issues: (1) Support for multiple independently-managed schemas, (2) Ease of schema evolution, and (3) Simple schema mappings. In order to address these issues, we propose a novel approach to semantic integration of scientific data which uses XML schemas and RDF-based schema mappings. In this approach, XML schema al-lows scientists to manage data models intuitively and to use commodity XML DBMS tools. A simple RDF-based ontological representation scheme is used for only structural relations among independently-managed XML schemas from different institutes or domains We present the design and implementation of a prototype system developed for the national cyber-environments for civil engi-neering research activities in Korea (similar to the NEES project in USA) which is called KOCEDgrid (http://www.koced.net).

• Journal of KIISE:Databases
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• v.31 no.1
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• pp.1-12
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• 2004

As network systems are developed rapidly and network architectures are more complex than before, it needs to use PBNM(Policy-Based Network Management) in network system. Generally, architecture of the PBNM consists of two hierarchical layers: management layer and enforcement layer. A security policy server in the management layer should be able to generate new policy, delete, update the existing policy and decide the policy when security policy is requested. And the security policy server should be able to analyze and manage the alert messages received from Policy enforcement system in the enforcement layer for the available information. In this paper, we propose an alert analyzer using data mining. First, in the framework of the policy-based network security management, we design and implement an alert analyzes that analyzes alert data stored in DBMS. The alert analyzer is a helpful system to manage the fault users or hosts. Second, we implement a data mining system for analyzing alert data. The implemented mining system can support alert analyzer and the high level analyzer efficiently for the security policy management. Finally, the proposed system is evaluated with performance parameter, and is able to find out new alert sequences and similar alert patterns.

• Journal of KIISE:Software and Applications
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• v.28 no.4
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• pp.346-357
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• 2001

웹 자원을 효율적으로 관리하기 위해서 메타데이타(metadata)의 활용이 증가하고 있으며, 이 활용 분야 중 웹사이트 관리를 위한 응용들은 표준화되지 않아서 상호호환성의 문제를 가지고 있다. 따라서 본 논문에서는 메타데이타의 표준화와 상호운영을 목적으로 하는 RDF(Resources Description Framework)를 이용하여 웹사이트 관리를 위한 메타데이타 생성 시스템을 제안한다. 제안된 시스템은 웹사이트를 기관 도메인별로 자동 분류하고, 정보를 구조적 형식으로 기술하여 효율적인 검색 환경을 제시할 수 있다. 이를 위해 더블린 코어를 기반으로 한 메타데이타 모델 및 RDF 메타데이타를 자동 생생하기 위한 사상 규칙과 알고리즘을 제시하고 시스템을 구현한다.

• Proceedings of the Korea Database Society Conference
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• 1999.10a
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• pp.349-355
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• 1999

무한경쟁의 세계질서에 대응하기 위하여 과학기술 발전의 기반을 이루고 있는 학회정보유통의 경쟁력을 확보하는 일이 중요해지고 있다. 특히 과학기술 관련학회는 방대한 자료를 축적 및 생산하고 있는 첨단 과학기술정보의 보고로서 이러한 정보를 신속하게 실수요자에게 유통시킬 수 있는 기반 마련이 요구되고 있다. 이에 과학기술통합정보시스템 구축 사업의 일환으로 구축된 학회정보유통체제는 정보의 생성단계부터 서비스 단계까지를 시스템화하였다. 즉, 심사논문의 제출단계부터 게재여부 결정단계까지의 모든 과정을 시스템화하여 발생하는 모든 정보를 관리하고 게재 결정된 논문들은 자동적으로 데이터베이스로 구축되어 일반사용자들에게 첨단정보론 신속하게 제공할 수 있는 체제를 구축하였다.

• Journal of KIISE:Computing Practices and Letters
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• v.11 no.4
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• pp.334-348
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• 2005

The goal of next generation digital broadcasting is offering the interaction among consumers and providers as well as variety services. One of the important factors for this new broadcasting environment keeps the interoperability among providers and consumers since the environment is distributed. Therefore a standard metadata for digital broadcasting is required and TV-Anytime metadata is one of the metadata standards for digital broadcasting. The terminal nodes of TV-Anytime metadata are defined by using MPEG-7 metadata. MPEG-7 metadata is standard metadata for describing multimedia content. Therefore, if we use the MPEG-7 metadata for describing broadcasting content can offer multimedia search services like content-based search by the extension of metadata. The efficient management system for these metadata is important for offering the services with high Duality on real broadcasting environment TV-Anytime metadata and MPEG-7 metadata are technically defined using a single XML schema, so its instances are XML data. Currently, a lot of systemsfor managing XML data are proposed in many researchers and we can expect to adapt these systems for managing broadcasting metadata. But the methods used in these systems are not specific methods for managing broadcasting metadata because of methods for general-purpose. In this paper, we find the properties of broadcasting metadata and develop an efficient metadata management system that is based on the found properties. Since our systemis implemented on real broadcasting environment, we expect that the system is most efficient and suitable. Also our system is interoperable since we use XQuery as query language for querying broadcasting metadata.

• Journal of KIISE:Databases
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• v.27 no.1
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• pp.22-32
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• 2000

The Digital Library is the integrated system of Information Retrieval System(IRS) and Database Management system(DBMS). In the Digital Library environment where dynamic query and update processes are required, however, the existing transaction management methods cause the following problems. First, since the traditional consistency criteria is too restrictive, it causes increment of query processing time and cannot guarantee the reflection of recency. Second, query result could be unreliable because the consistency criteria between source data and metadata is not defined. This paper models the access to metadata based on Dublin Core as query transactions and update transactions, and gives the efficient method to manage them. Particularly, this paper describes the consistency criteria of metadata which takes it Into consideration the consistency between the result of query transaction and status of source data in the Digital Library, that is different from the consistency criteria in traditional transaction management. It also presents analysis of the view point of query transaction to reflect recency and proposes metadata management to guarantee recency within metadata consistency.

• Journal of KIISE:Databases
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• v.30 no.6
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• pp.561-572
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• 2003

Broadcast-based data delivery has attracted a lot of attention as an efficient way of disseminating data to very large client populations. The main motivation of broadcast-based information systems (BBISs) is that the number of clients that they serve can grow arbitrarily large without any effect on their performance. The performance of BBISs depends mainly on client caching strategies and on data broadcast scheduling mechanisms. This paper addresses the former issue and proposes a new client cache management scheme, named 2Q-CFP, that is suitable to BBISs. This paper also evaluates the performance of 2Q-CFP on the basis of a simulation model. The performance results indicate that 2Q-CFP scheme shows superior performances over GRAY, LRU and CF in the average response time.