• Title/Summary/Keyword: Concept-based Information Retrieval

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Experimental Study for Effective Combination of Opinion Features (효과적인 의견 자질 결합을 위한 실험적 연구)

  • Han, Kyoung-Soo
    • Journal of the Korean Society for information Management
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    • v.27 no.3
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    • pp.227-239
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    • 2010
  • Opinion retrieval is to retrieve items which are relevant to the user information need topically and include opinion about the topic. This paper aims to find a method to represent user information need for effective opinion retrieval and to analyze the combination methods for opinion features through various experiments. The experiments are carried out in the inference network framework using the Blogs06 collection and 100 TREC test topics. The results show that our suggested representation method based on hidden 'opinion' concept is effective, and the compact model with very small opinion lexicon shows the comparable performance to the previous model on the same test data set.

A Study on Location-Based Services Based on Semantic Web

  • Kim, Jong-Woo;Kim, Ju-Yeon;Kim, Chang-Soo
    • Journal of Korea Multimedia Society
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    • v.10 no.12
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    • pp.1752-1761
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    • 2007
  • Location-based services are a recent concept that integrates a mobile device's location with other information in order to provide added value to a user. Although Location-based Services provide users with comfortable information, it is a complex task to manage and share heterogeneous and numerous data in decentralized environments. In this paper, we propose the Semantic LBS Model as one of the solution to resolve the problem. The Semantic LBS Model is a LBS middleware model that includes an ontology-based data model for LBS POI information and its processing mechanism based on Semantic Web technologies. Our model enables POI information to be described and retrieved over various domain-specific ontologies based on our proposed POIDL ontology. This mechanism provide rich expressiveness, interoperability, flexibility in describing and using information about POls, and it can enhance POI retrieval services.

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A Concept-Based Image Retrieval with Edge Description Templates (에지 디스크립션 템플릿을 이용한 개념기반 이미지 검색)

  • 최재훈;박성희;박수준;강희범
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.04b
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    • pp.130-132
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    • 2002
  • 본 논문에서는 에지 디스크립션 템플릿을 이용한 개념기반 이미지 검색 모델을 제안한다. 이 모델은 하나의 개념과 관련된 여러 형태의 이미지 템플릿들을 명시한 지식베이스를 채용한다. 여기서, 이미지 템플릿은MPEG-7국제 표준으로 채택된 에지 히스토그램 디스크립션 방법으로 표현된다 따라서, 하나의 이미지는 자신의 에지 히스토그램과 유사한 템플릿를 가지는 개념으로 색인될 수 있기 때문에 이 모델은 방대한 이미지에 대한 자동 색인과 개념기반 검색을 지 인할 수 있다.

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A Spatio-temporal Representation Scheme for supporting Content- and Concept-based Video Retrieval (내용 및 개념 기반 비디오 검색을 지원하는 시공간 표현 기법)

  • 심춘보;장재우
    • Proceedings of the Korean Information Science Society Conference
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    • 2001.04b
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    • pp.64-66
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    • 2001
  • 비디오 데이터는 미디어의 특성상 시간의 흐름에 따라 객체의 위치가 변하는 움직임 객체(Moving Object)를 가지며, 움직임 객체를 기반으로 비디오 데이트를 색인 및 검색하기 위해서는 적합한 시공간 표현 기법이 요구된다. 따라서 본 논문에서는 비디오 데이터가 지니는 움직임 객체의 움직임 경로(Trajectory)를 효율적으로 모델링하고 사용자에게 빠른 검색 결과를 제공할수 있는 근사 탐색(Approximation Search)이 가능한 새로운 시공간 표현 기법을 제안한다. 이는 사용자가 직접 스케치한 움직임 경로를 토대로 검색을 수행하는 내용 기반 검색과 움직임 객체의 일련의 움직임 경로들과 움직임 경로가 일어나는 위치 정보를 통해 얻어진 개념(의미)을 이용한 개념 기반 검색을 지원한다.

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Medicine Ontology Building based on Semantic Relation and Its Application (의미관계 정보를 이용한 약품 온톨로지의 구축과 활용)

  • Lim Soo-Yeon;Park Seong-Bae;Lee Sang-Jo
    • Journal of KIISE:Software and Applications
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    • v.32 no.5
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    • pp.428-437
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    • 2005
  • An ontology consists of a set and definition of concepts that represents the characteristics of a given domain and relationship between the elements. To reduce time-consuming and cost in building ontology, this paper proposes a semiautomatic method to build a domain ontology using the results of text analysis. To do this, we Propose a terminology processing method and use the extracted concepts and semantic relations between them to build ontology. An experiment domain is selected by the pharmacy field and the built ontology is applied to document retrieval. In order to represent usefulness for retrieving a document using the hierarchical relations in ontology, we compared a typical keyword based retrieval method with an ontology based retrieval method, which uses related information in an ontology for a related feedback. As a result, the latter shows the improvement of precision and recall by $4.97\%$ and $0.78\%$ respectively.

KNetIRS : Information Retrieval System using Keyword Network (KNetIRS : 키워드망을 이용한 정보검색 시스템)

  • Woo, Sun-Mi;Yoo, Chun-Sik;Lee, Chong-Deuk;Kim, Yong-Sung
    • The Transactions of the Korea Information Processing Society
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    • v.4 no.9
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    • pp.2185-2196
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    • 1997
  • The existing information retrieval systems utilize thesaurus in order to search and retrieve the desired information even when the query is not accurate. However the cost for implementing and maintaining thesaurus is very high and it can not guarantee complete success of search/retrieval operation. Thus in this paper, Information Retrieval System using Keyword Network(KNetIRS) which was designed and implemented to solve these problem is introduced. Keyword Network composed of keywords which were extracted from documents. KNetIRS finds the appropriate documents by using the Keyword Network which is based on the concept of "inverted file". In addition, KNetIRS can carry out query expansion by using the Keyword Network Browser, and deal with the conjunction of "정보 검색", "정보", and "검색", by defining and implementing spilt function.

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New Information Behavior Model: Life Paradigm Based (생명 패러다임 정보행태모델)

  • Lee, Hyuk-Jin
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.27 no.1
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    • pp.217-235
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    • 2016
  • Humanities academia and scientific community have been fused together in 21st centurty and it creates new theories and models. Among them, the embodied cognition theory has received attention in several related fields. This study reviews the major metatheories in information user behavior with their limitations. Then, "Life paradigm information behavior model" is suggested as a new theory, which communsurates with new era's request, introducing the embodied cognition theory and the entropy concept. By overcoming the limitations of individual approach to the information retrieval and user behaviors, we expect the discourse of the new integrated information retrieval paradigm.

On Development of an Automatic Tool for Extracting Association Rules of a user query using Formal Concept Analysis (형식개념분석기법을 이용한 사용자 질의 기반의 연관관계 추출 자동화지원도구의 개발)

  • Kim, Eung-Hee;Hwang, Suk-Hyung;Kim, Hong-Gee
    • The KIPS Transactions:PartD
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    • v.15D no.3
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    • pp.429-440
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    • 2008
  • Formal Concept Analysis (FCA) is a widely used methodology for data analysis, which extracts concepts and builds a concept hierarchy from given data. A concept consists of objects and attributes shared by those objects, and a concept hierarchy includes information on super-sub relations among the concepts. In this paper, we propose a method for extracting Implication and Association rules from a concept hierarchy given a query by a user. The method also describes a way for displaying the extracted rules. Based on this method, we implemented an automatic tool, QAG-Wizard. Because the QAG-Wizard not only elicits relation information for the given query, but also displays it in structured form intuitively, we expect that it can be used in the fields of data analysis, data mining and information retrieval for various purposes.

An Analysis of the Effect of an Ontology-Based Information Searching Model as a Supplementary Learning Tool (학습 보조 도구로서 온톨로지 검색 모델의 효과 분석)

  • Choi, Sook-Young
    • The Journal of Korean Association of Computer Education
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    • v.14 no.1
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    • pp.159-168
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    • 2011
  • This study analyzed whether the ontology-based information-searching model affected the ability of students to effectively search for meaningful information to carry out their projects. The experiment results illustrated that the amount of relevant information sought by the ontology-based information retrieval (OIR) method was significantly greater than that of the existing information retrieval (EIR) method. In addition, the relevance rate of the bookmarked documents sought by the OIR method was significantly greater than that of the EIR method. Interviews showed that the OIR model was helpful for students to effectively find information and thus, it helped them to complete the project more easily. Furthermore, the OIR model was beneficial for them to understand the subordinate concepts and their relationships for an important learning concept. The results of this study indicate that the OIR model could be used as a supplementary learning tool for project-based learning.

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A Study on the Practical Application Plans of a Library Information System through Web 2.0 Site Analysis (Web 2.0 기술 적용 사이트 분석을 통한 도서관 정보시스템의 활용방안에 관한 연구)

  • Park, Mi-Sung
    • Journal of Korean Library and Information Science Society
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    • v.39 no.1
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    • pp.139-168
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    • 2008
  • With the advent of the Web 2.0 technology, its versatility has been experienced through various web sites. Consequently, many library users request to implement this technology into the library information system. Here this paper try to increase our understanding of the concept and technology of the Web 2.0, Library 2.0. and Catalog 2.0(OPAC 2.0) through literature survey. Also, this paper try to figure out the most applicable technology to the library information system by analyzing the representative web sites and libraries equipped with Web 2.0 technology. Finally, based on the analysis results, this study suggests an applicable practical plans in the field of catalog, retrieval and auxiliary services toward the user-friendly library information system. We also indicate several side effects expected with the implementation of the suggested plans.

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