• Computational Structural Engineering
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• v.2 no.1
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• pp.79-86
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• 1989

This paper concentrates on the development of simplified and effective algorithm for optimum reinforced concrete(RC) member design. After constructing the data base of predetermined RC sections which are arranged in the order of increasing resistant capacity, the relationship between the section identification numbers and resistant capacities of sections is estabilished by regression and it can be used to obtain the initial solution(section) which satisfies the design constraints imposed. Assuming that there exists the optimum solution. The optimization of the entire structure is accomplished through the individual mumber optimization.

• The Transactions of the Korea Information Processing Society
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• v.3 no.3
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• pp.417-428
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• 1996

In this paper, a database interface system with natural language dialogue is designed and implemented. The system is made up of language analysis, context processing, dialogue processing and DB processing unit. The method for classifying and processing an undefined word in language analysis is proposed. It reduces the dictionary size, which gives difficulties in DB Interface. And the current DB Interfaces dealt with an input utterance independently. But the system in this paper provides a user with the interface environment in which he or she can have a continuous conversation with the system and retrieve DB information. Thus in this paper, speech acts which include user's inattentions well as propositional contents are defined, and user action hierarchical model for library DB retrieval is constructed. And the system uses the defined knowledge to recognize-user's plan, effectively understanding and managing the ongoing dialogue. And the system is implemented in the domain of library database in order to prove the proposed methods in this paper.

• Journal of KIISE:Computing Practices and Letters
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• v.9 no.6
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• pp.610-622
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• 2003

Metadata Registry was developed to dynamically manage metadata and to increase interoperability between various and heterogeneous metadata. The built metadata registry can be used as a standard guideline for creation of new databases and it provides a radical data integration mechanism. However, in the situation that an enormous databases must be integrated progressively, there is a limit to the existing metadata-based approach. In case that each database has no statistical information for its use rate and the restricted cost is given to us for a unit time, existing metadata-based approaches do not provide how to select some databases to be preferentially integrated and to build a metadata registry progressively, In this paper, we propose a methodology that can create progressively metadata registries in the case. The proposed methodology is based on data visibility and hierarchical metadata registry. We also describe the system that have been developed for applying the methodology to a real domain, and then described its results.

• Computational Structural Engineering
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• v.4 no.3
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• pp.36-39
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• 1991

이미 상당부분 CAD시스템이 사용되고 있는 건축설계 분야는 새로운 전환기를 맞이하고 있다. 제도보조도구로서의 컴퓨터가 일반화되어 널리 확산되어가는 반면 진정한 전산보조설계를 위한 새로운 시도와 연구가 각 분야에서 시작되고 있다는 것이다. 이러한 활발한 움직임의 바탕에는 컴퓨터에 대한 사회적인 인식의 변화가 흐르고 있으며 되돌릴 수 없는 발전의 역사를 감지할 수 있다. 따라서 새롭게 다가오는 변화를 보다 능동적으로 수용하기 위해서는 기반이 되는 분야별 CAD/CAE를 점검하고 엔지니어링데이타베이스를 구축해 나가는 것이 현재 건축설계 분야에서 시도해야 할 중요한 일이다. 특히 엔지니어링데이타베이스의 경우 하나의 사무소에서 단독으로 구축하는 것은 불가능한 일이므로 학회나 유관단체 등의 선도적 역할에 힘입어 업계에서 공동으로 구축하고 활용하는 방안이 조속히 논의되기를 기대한다.

• Journal of KIISE:Computing Practices and Letters
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• v.9 no.2
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• pp.213-225
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• 2003

In multimedia database system, it is very important issue how to query multimedia data and present the result of query. Also, in order to reuse the query result in other applications, multimedia database system must be considered to provide the query result which is more generalized form. In this paper, I propose a presentation model for presenting query result in multimedia database system and MMSQL based on the developed model for processing multimedia database query. This paper includes the design and implementation of MMSQL query processor. MMSQL query processor provides the presentation of query result which is SMIL (Synchronized Multimedia Integration Language) document. Therefore, MMSQL query result in this paper can be use to variant multimedia applications.

• Spatial Information Research
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• v.1 no.1
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• pp.7-16
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• 1993

Current computer technologies developing. our requirements are changing from simple alpha-numeric processing to graphic and image. spatial data processing which are easy for user to understand and use. Geographic information system is a kind of spatial database system that can not only print out the data in the form of maps but also manipulate. store. retrieve. and analyze the geographic data. It is efficient system that can process the spatial data which has a geographical feature and its relative attribute data. Conventional relational database management systems are not suitable for spatial data processing, so we need to design the spatial database mana-gement system which is suitable for efficient spatial data processing. In this paper we design the extended storage management system that supports the spatial index technique that allows user to access fast and store and manage the enormous spatial data efficiently like geographic information system.

• The Transactions of the Korea Information Processing Society
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• v.2 no.1
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• pp.12-22
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• 1995

When we integrate schema of distributed local databases, we mean entity integration as central concept of schema integration, and semantic of entity affects several factors. Thus the schema integration in distributed database environment starts from definition of domain relation among entity types of local schemas. Moreover, the domain relation defined by designer needs some works for confidence and validation of schema integration system. But this work was not presented in previous integration system. In this paper, we define object oriented integration for schema integration of local databases in distributed system environment, present models to verify validation on its integration, and implement the validation system.

• Journal of Digital Contents Society
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• v.18 no.5
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• pp.811-820
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• 2017

For content-based audio retrieval which is one of main functions in audio service, the techniques for extracting fingerprints from the audio source, storing and indexing them in a database are widely used. However, if the fingerprints of new audio sources are continually inserted into the database, there is a problem that space efficiency as well as audio retrieval performance are gradually deteriorated. Therefore, there is a need for techniques to support efficient expansion of audio database without periodic reorganization of the database that would increase the system operation cost. In this paper, we design a content-based audio retrieval system that solves this problem by using MapReduce and NoSQL database in a cluster computing environment based on the Shazam's fingerprinting algorithm, and evaluate its performance through a detailed set of experiments using real world audio data.

• Proceedings of the Korea Database Society Conference
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• 1996.04a
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• pp.151-185
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• 1996

개발된 시스템의 특징 ■ 웹을 이용한 대규모 멀티미디어 데이타베이스 서비스 ■ 고품질의 방대한 데이타 서비스 $\textbullet$전문정보, 이미지, 비디오, 3D비디오와 설계도면 $\textbullet$ 8,000여건의 문화재 정보, 1,000여건의 유물정보, 2,000여건의 미술 작품과 작가정보 ■ DB 검색기능과 정보검색기능의 상호보완적인 통합 ■ 객체관계 DBMS 기술을 이용한 DB관리 ■ UniWeb을 이용한 웹과 DBMS의 연동(중략)

• Proceedings of the Korea Database Society Conference
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• 2000.11a
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• pp.89-94
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• 2000

본 논문에서는 연관 규칙 탐사 시스템을 설계하고 구현하였다. 본 시스템은 관계형 데이터베이스의 표준 질의어를 이용하여 사용자가 제시한 질의 조건을 만족하는 항목집합에 대해 다양한 형태의 연관규칙을 탐사하기 위한 시스템이다. 질의처리 모듈에서는 사용자가 제시한 조건을 만족하는 질의를 동적으로 구성하여, 연관 규칙 탐사를 위해 사용되는 대상 트랜잭션 데이타베이스의 범위를 조절할 수 있다. 연관 규칙을 발견하기 위한 후보 항목집합을 생성하기 위해 연관 규칙 탐사 알고리즘을 사용하였다. 연관 규칙 알고리즘에서는 한 트랜잭션 데이타에 대해 생성될 수 있는 후보 항목집합을 배열을 이용하여 처리하는 효율적인 방법을 제안하였다.