• Journal of the Korean Society for information Management
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• v.20 no.3
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• pp.155-175
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• 2003

The purpose of the study was to construct a system based on the semantic web environment's ontology by utilizing the ontology schema derived from the facet-type Art and Architecture Thesaurus(AAT). The aforementioned ontology schema is based on the Web Ontology Language(OWL), which is being widely considered the standard ontology language for the W3C-centered semantic web environment. Also, the concepts were limited to terms within AAT'S Furniture Facet, and the system was tested using the Chair concept, which is a lower-level facet that has a diverse conceptual relationship and broad vocabulary base. The ontology system is capable of searching for concepts, while controlling the search results by always providing a 'Preferred term' for synonymous terms. In addition, the system provides the user with first, a relationship between the terms centered around the inquiry, and second, related terms along with their classification properties. Also, the system is presented as and application example of the ontology system that constructs a information system that intakes an Instance value and reproduces it into a RDF file. During this process, utilization of multiple ontologies was introduced, and the stored Instance value's meta-data elements were used.

• Journal of the Korean Society for Library and Information Science
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• v.49 no.4
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• pp.179-201
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• 2015

The subject heading is an elaborate access tool for subject browsing and searching in information retrieval environment. The purpose of this study is to suggest the applicable facets to subject headings in Korea. First, the concepts of subject and the definitions of facets were investigated in the literature review. Second, six cases including OCLC's FAST, PRECIS, "Thesaurus construction and use", CC $7^{th}$ edition, BC $2^{nd}$ Edition, and UDC $3^{rd}$ Edition were analyzed to focus on configuration of facets as case studies. Based on the results, twenty-two facets were proposed including Topical, Event, Geography, Chronology, Personal and Corporate Name, Title, Form, Genre, Language, and Person facets as 11 top facets. Also, Topical-Thing/Entity and Topical-Action/Status, Part, Kind, Property, Whole, Material, Patient, Product, By-Product and Agent facets as sub-facets of Topical facet.

• Journal of KIISE:Software and Applications
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• v.29 no.4
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• pp.278-288
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• 2002

This paper presents a design and implementation of fuzzy retrieval system that could support an associated learning in problem banks. It tries to retrieve some of the problems conceptually related to specific semantics described by user's queries. In particular, the problem retrieval system employs a fuzzy thesaurus which represents relationships between domain dependent vocabularies as fuzzy degrees. It would keep track of characteristics of the associated learning, which should guarantee high recall and acceptable precision for retrieval effectiveness. That is, since the thesaurus could make a vocabulary mismatch problem resolved among query terms and document index terms, this retrieval system could take a chance to effectively support user's associated teaming. Finally, we have evaluated whether the fuzzy retrieval system is appropriate for the associated teaming or not, by means of its precision and recall rate point of view.

• Journal of KIISE:Software and Applications
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• v.35 no.9
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• pp.562-571
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• 2008

For the purpose of building domain ontology, this paper proposes a methodology for building core ontology first, and then enriching the core ontology with the concepts and relations in the domain thesaurus. First, the top-level concept taxonomy of the core ontology is built using domain dictionary and general domain thesaurus. Then, the concepts of the domain thesaurus are classified into top-level concepts in the core ontology, and relations between broader terms (BT) - narrower terms (NT) and related terms (RT) are classified into semantic relations defined for the core ontology. To classify concepts, a two-step approach is adopted, in which a frequency-based approach is complemented with a similarity-based approach. To classify relations, two techniques are applied: (i) for the case of insufficient training data, a rule-based module is for identifying isa relation out of non-isa ones; a pattern-based approach is for classifying non-taxonomic semantic relations from non-isa. (ii) For the case of sufficient training data, a maximum-entropy model is adopted in the feature-based classification, where k-NN approach is for noisy filtering of training data. A series of experiments show that performances of the proposed systems are quite promising and comparable to judgments by human experts.

• Proceedings of the Korean Society for Information Management Conference
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• 2002.08a
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• pp.197-204
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• 2002

형용사는 감성 및 감정검색을 위한 색인에서 주로 사용된다. 이를 위해서는 형용사의 개념관계를 파악하고 표현하는 것이 중요한 일이다. 본 연구에서는 형용사의 개념관계를 표현하기 위하여 형용사의 특성, 관련 개념구조를 고찰하고, 아울러 구조화, 관계, 표시방법, 배열 등을 고려하여 형용사 시소러스를 설계하였다.

• Proceedings of the Korean Society for Information Management Conference
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• 1998.08a
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• pp.235-238
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• 1998

본 연구에서는 기존의 분석합성형 분류체계(BC2)로부터 개념과 관계를 추출하여 작성한 자모순 시소러스에 패싯도구를 삽입하여 용어의 개념과 관계를 정확하게 이해할 수 있도록 제시하는데 그 목적이 있다. 그리고, 이러한 과정을 통해 기존의 분류체계나 시소러스가 지니고 있는 한계를 개선하고자 한다.

• Proceedings of the Korean Society for Information Management Conference
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• 1994.12a
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• pp.109-112
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• 1994

본고에서는 전문정보 검색시스템의 검색효율을 높일 수 있는 방안에 하나로서 해당주제분야별 전문정보의 시소러스 개발을 제안하고, 이를 통해 이용자 중심의 전문정보 검색시스템을 구축하는데 도움을 줄 수 있는 방안을 모색하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.803-804
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• 2007

• Proceedings of the Korean Society for Language and Information Conference
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• 2006.06a
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• pp.209-224
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• 2006

• 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.