• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.976-979
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• 2010

온톨로지(Ontology)란 사람들이 세상에 대하여 보고 듣고 느끼고 생각하는 것에 대하여 서로 간의 토론을 통하여 합의를 이룬 바를 개념적이고 컴퓨터에서 다룰 수 있는 형태로 표현한 모델로, 개념의 타입이나 사용상의 제약조건들을 명시적으로 정의한 기술이다. 온톨로지는 일단 합의된 지식을 나타내므로 어느 개인에게 국한되는 것이 아니라 그룹 구성원이 모두 동의하는 개념이다. 그리고 프로그램이 이해할 수 있어야 하므로 여러 가지 정형화가 존재한다. 온톨로지는 자연어의 기계 번역과 인공지능 분야에서 활용되며, 최근에는 특정 분야의 인터넷 자원과 그 사이의 관계를 기술하는 온톨로지를 사용하는 시맨틱 웹과 이것에서 파생된 시맨틱 웹 서비스 등의 핵심 요소로서 주목받고 있다. 이 논문은 본 연구에서는 창업 시스템 사례를 통한 온톨로지 개발 및 구축을 제안한다. 온톨로지를 이용한 창업 시스템의 개발은 창업 영역에서 서비스 시스템 구현의 토대가 될 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.16-19
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• 2006

본 논문은 2006년부터 시작된 "국가 IT 온톨로지 인프라 기술개발" 과제의 온톨로지 구축 부분을 소개한다. 이 과제는 2006년부터 2011년까지의 5년 과제로 산학연이 참여하여, 국가 IT 분야에 범용적으로 활용이 가능한 IT 온톨로지를 구축하고 인터넷, 인트라넷, 유비쿼터스 환경에서 제공되는 각종 IT 서비스에 적용하여 seamless 서비스를 제공하는 것을 목표로 하고 있다. 이 온톨로지는 한-영 2개의 언어로 제작되며, 국제표준 언어인 OWL을 사용하여 국내외적으로 널리 사용될 수 있는 대용량 IT 온톨로지를 목표로 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.294-299
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• 2006

추천 시스템은 사용자 프로파일을 기반으로 개인 취향에 맞는 정보나 제품에 대한 이용성을 향상 시킨다. 본 논문에서는 시멘틱 환경 내에서 사용자 개개인에 맞는 웹 콘텐츠를 제공하기 위한 온톨로지 기반의 웹 콘텐츠 추천 방법론을 제안한다. 이를 위해서 2가지에 초점을 두었다. 첫 번째, 사용자 프로파일의 쓰임새를 향상시키기 위해 온톨로지 모델을 적용한다. 이는 비슷한 서비스를 제공하는 여러 웹 서비스 사이트에서 사용자의 기호 정보를 공유할 수 있다는 이점을 갖는다. 또한 온톨로지를 기반으로 생성된 사용자 프로파일은 콘텐츠 추천 점수 계산을 위한 정확한 입력 데이터를 제공한다. 두 번째로 각각의 웹 콘텐츠들의 추천 점수를 계산하는 함수를 정의한다. 제안하고자 하는 함수는 각 웹 콘텐츠의 계층구조와 웹 콘텐츠를 구성하는 속성들의 관계를 명시한 온톨로지를 기반으로, 사용자 프로파일의 내용과 웹 콘텐츠의 개념 유사도(Concept Similarity)와 관계 유사도(Relation Similarity) 구한다. 따라서 본 논문에서는 전체 유사도(Concept Similarity+Relation Similarity)를 추천 점수로 적용한다.

• The KIPS Transactions:PartB
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• v.15B no.3
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• pp.237-244
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• 2008

In this paper, an infra-structure using the ontology based on the pulse information is proposed for the context-aware service of medical information system in ubiquitous computing environment. An diagnosis service inference system that represents the pulse data which was generated by the pulse-diagnosis with wearable signal, temperature, humidity, time, and other factors as ontology with artificial intelligence methods and describes the service scenario based on the ontology is designed and implemented.

• Journal of the Korea Society of Computer and Information
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• v.11 no.1 s.39
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• pp.185-194
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• 2006

The ubiquitous computing environment focuses on recognizing the context and Physical entities, whereas, previous computing environments mainly focused on the conversational interactions between the computer and the user. For this reason, there has been an increase in the research of context aware computing environments. In previous researches , context services are designed using context ontology used in context aware middleware. So, context service cannot change the context ontology in execution time. We propose a hierarchical context ontology management for context aware service to change their ontology in execution time. And we also a resolution model for context conflict which is occurred in inference of context. We have designed a middleware based on this model and implemented the middleware. As the middleware is implemented on the OSGi framework, it can cause interoperability among devices such as computers, PDAs, home appliances and sensors. It can also support the development and operation of context aware services, which are required in the ubiquitous computing environment.

• Journal of the Korea Society of Computer and Information
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• v.24 no.10
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• pp.195-203
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• 2019

Inadequate military soldiers cause military fatigue and rejection such as reduced confidence in the military and combat power. The military developed and applied a self-adopting test as a psychological test system to identify soldiers who are not fit to serve in the military in advance and prevent accidents. In this paper, we propose the ontology design process to be used for identifying accident concerns and implement the behavioral patterns and symptoms of maladjustment soldiers as ontology. The ontology design process is validated consistency and suitability as a result of the performance evaluation of ontology implemented. Through ontology design for identifying maladjustment soldiers, it is expected to play an effective role in preventing accidents by providing objective criteria and sharing of information on accident concerns.

• Journal of the Korean Society for information Management
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• v.21 no.2
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• pp.249-267
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• 2004

Although MARC can define the detail cataloguing data, it has complex structures and frameworks to represent bibliographic information. On account of these idiosyncratic features of MARC, XML DTD or RDF/S that supports simple hierarchy of conceptual vocabularies cannot capture MARC formalism effectively. This study implements bibliographic ontology by means of abstracting conceptual relationships between bibliographic vocabularies of MARC. The bibliographic ontology is formalized with OWL that can represent the logical relations between conceptual elements and specify cardinality and property value restrictions. The bibliographic ontology in this study will provide metadata for cataloguing data and resolve compatibility problems between cataloguing systems. And it can also contribute the development of next generation bibliographic information system using semantic Web services.

• Journal of the Korea Society of Computer and Information
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• v.14 no.11
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• pp.21-30
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• 2009

Semantic web uses ontology languages such as RDF, RDFS, and OWL to define the metadata on the web. There have been many researching efforts in the semantic web technologies based on an agent for extracting triple and relation about concept of ontology. But the extraction of relation and triple about the concept of ontology based on an agent ends up writing a limited query statement as characteristics of an agent. As for this, there is the less of flexibility when extracting triple and relation about the other concept of ontology. We are need a query tool for flexible information retrieval of ontology that is can access the standard ontology and can be used standard query language. In this paper, we propose a SPARQL query tool that is can access the OWL ontology via HTTP protocol and it can be used to make a query. Query result can be output to the soap message. These operations can be support the web service.

• Journal of Digital Contents Society
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• v.15 no.5
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• pp.569-577
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• 2014

The various services are required to user in time and space. It is important to provide suitable service to user according to user's circumstance. Therefore it is need to provide services to user through mining by latest information of user activity and service history. In this paper we propose a mining method to search association rule using service history based on spatiotemporal information and service ontology. In this method, we find the associative service pattern using level-cross tree on service ontology. The proposed method is to be a basic research to find the service pattern to provide high quality service to user according to season, location and age under the same context.

• The KIPS Transactions:PartD
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• v.18D no.2
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• pp.133-142
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• 2011

To ensure the successful employment of semantic web services, it is essential that they rely on the use of high quality ontologies. However, building such ontologies is difficult and costly, thus hampering web service deployment. This study automatically builds ontologies from WSDL documents and their underlying semantics, and presents discovery methods of similar web service operations using these ontologies. The key ingredient is techniques that cluster parameters in the collection of web services into semantically meaningful concepts, and capture the hierarchical relationships between the words contained in the tag. We implement an operation retrieval system for web services. This system finds out a ranked set of similar operations using a novel similarity measurement method, and selects the most optimal operation which satisfies user's requirements. It can be directly used for the web services composition.