• Journal of the Korean BIBLIA Society for library and Information Science
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• v.17 no.1
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• pp.285-303
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• 2006

This study suggests the method of converting thesauri to SKOS step by step and it is formalized in three stages of the conversion process. The study develops output and guidelines for each stage. The converting stages are: (1) Collecting and analyzing thesauri for understanding about structure of terms and semantics of relation. (2) Defining the conversion method and creating ontology of the thesauri. (3) Examining the preservation of forms and various semantic relations between the thesauri and then creating SKOS ontology. This method can be applied to the thesauruses with complicated relations in concepts. In the future, it is needed to have an embodiment of conversion after making the algorithm of conversion by stage with the method suggested in this research.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.181-183
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• 2004

본 논문은 하나의 도메인에 대해 서로 연관된 여러 개의 시소러스를 효율적으로 구축, 관리, 검색, 브라우징, 항해하기 위한 확장된 객체기반 시소러스 시스템을 제안한다. 이 시스템은 1) 대규모의 시소러스를 효율적으로 분산하여 구축할 수 있는 기능을 제공하고, 2) 구축된 시소러스간의 일관성 있는 검색, 브라우징, 항해를 제공한다 이러한 기능을 통해 사용자들은 내부적으로 분산된 시소러스를 하나의 시소러스처럼 이용할 수 있다.

• Proceedings of the Korean Society for Information Management Conference
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• 2001.08a
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• pp.5-10
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• 2001

둘 이상의 언어를 포함하고, 그 중 참조하는 언어를 중심으로 용어관계를 표시할 수 있는 다국어 시소러스의 개념구조에 대하여 논하였다. 아울러, 우리말을 기준어로 삼고, 기본요건, 구조화, 용어관계, 동형이의어, 표시방법, 배열 등에 대한 예시와 함께 다국어 시소러스의 설계방안을 제시하였다.

• Journal of KIISE:Software and Applications
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• v.27 no.12
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• pp.1211-1218
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• 2000

정보검색 분야에서 시소러스 용어와 용어 사이의 관계를 나타내어, 질의어와 검색될 정보 사이에 존재하는 용어적 차이를 줄이는데 사용될 수 있다. 시소러스를 사용하는 방법 중 진보된 것은 용어 사이의 관계에 가중치를 주어, 소위 스프레딩 엑티베이션 방법을 이용하여 주어진 용어에서 다른 용어들 사이의 유사성을 측정하여 이를 검색에 이용한다. 그러나, 이러한 방법은 가중치를 어떻게 할당하느냐에 따라 그 결과가 달라지는 문제점이 발생한다. 본 논문에서는 시소러스의 가중치를 사용자의 검색된 정보에 대한 적합성 반응에 근거하여 조절할 수 있는 신경망 기반 시소러스를 제안한다. 제안된 시소러스의 타당성을 위하여 프로토타입의 시소러스를 WordNet으로부터 추출하여 실험하였으며, 그 결과로 recall-precision 값이 향상됨을 보였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10d
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• pp.289-291
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• 2002

본 논문에서는 객체지향 패러다임의 구조적 특성을 적용하여 만든 시소러스를 이용하여 웹 자원의 의미적 연관성을 RDF 형식으로 표현할 수 있는 RDF 문서 자동 생성기를 소개한다. 객체지향 시소러스를 RDF 형식으로 나타내기 위해 시소러스에 사용된 객체와 관계의 내용을 명세한 네임 스페이스를 정의하여 시맨틱 웹에서 메타데이타를 기술하는 표준이 되는 RDF와 RDF Schema 형식으로 매핑할 수 있다. 이러한 연구를 통해 객체지향 시소러스의 내용을 RDF 형식으로 표현함으로써 지식베이스(KnowledgeBase)라 불리는 온톨로지를 생성할 수 있으며, 구축된 온톨로지는 시맨틱 웹 상의 에이전트나 다른 어플리케이션에 응용될 수 있다.

• Journal of the Korean Society for Library and Information Science
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• v.40 no.1
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• pp.293-314
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• 2006

To maintain consistency of terms in information retrieval process, it is necessary to present the meaning of terms definitely in thesaurus. Therefore, most of thesauri has presented meaning of terms through basic relationships or scope notes. But. thesaurus including standardized definitions in contents and form has been proposed lately. This study was performed to make standardized definitions and extract relationships in contents of defining models. Also, expanded thesaurus was constructed being integrated and replaced standardized definitions and extracted relationships into the existing thesaurus. As the result. this study has shown a possibility for further development of thesaurus.

• Journal of Navigation and Port Research
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• v.31 no.10
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• pp.853-858
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• 2007

In this paper, a seesaw system composed with a moving cart on the rail and seesaw frame is made to demonstrate the effectiveness of the control theory. The control aim is to maintain an equilibrium of seesaw frame in spite of various initial conditions and an allowable disturbance. To solve this control problem, a PI-type state feedback controller using reduced-order observer is implemented and applied to the seesaw system. The reduced-order observer can be used to estimate the state variables in the case of the limit of sensor number or the constraint on setting sensors and the cost. A series of simulation are carried out to verify the effectiveness of the control system.

• Journal of Korean Library and Information Science Society
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• v.41 no.3
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• pp.269-290
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• 2010

Applying one specific thesaurus might cause several problems because each thesaurus has its own characteristics inherited from its construction process. Therefore, integration of thesauri can be an appropriate approach to overcome the difficulties. This current research selected physics as a domain and two thesauri in the domain: PACS and PIRA. By integrating these two heterogeneous thesauri, this research could construct a conceptual structure that covers the whole concepts related to physics. By constructing the conceptual structure with the use of facet analysis from integrated thesaurus, it provides knowledge base with hierarchical structure and clear relationships between concepts. It can be an alternate approach to effective and efficient information retrieval and knowledge discovery.

• Journal of the Korean Society for information Management
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• v.23 no.4 s.62
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• pp.147-164
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• 2006

This paper reports an effort to construct a grand-scale Korean thesaurus that can be used for enhancing retrieval performance in various fields. This thesaurus is currently being used for indexing and retrieving purpose and new terms are being added to it. As the new demands on retrieval performance increase in Korea, developing a grand-scale ontology appears to be necessary so a project is undertaken to transfer the current thesaurus into an ontology system. The paper describes how the thesaurus is constructed and prepared to be the base for an ontology system.

• Journal of the Korean Society for Library and Information Science
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• v.33 no.3
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• pp.109-126
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• 1999

The purpose of this study is to design hypertext-based linear displays for an online thesaurus in librarianship and information science with the aid of ISO and ANSI/NISO thesaurus standards. This study starts with the assumptions that hypertext-based online thesauri would provide a convenient and useful subject retrieval tool to both indexers and searchers of information and become starting point for the study of thesauri searching patterns, which were difficult with printed thesauri. For this study, thesaurus of librarianship and information science was stored in MS ACCESS 97 as a relational database and, for the conjunction of a relational database with World Wide Web, technics of ASP(Active Server Pages) were applied under Windows NT operation.