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윤구호,Yoon Koo-ho 한국문헌정보학회 1981 한국문헌정보학회지 Vol.8 No.-
Retrieval effectiveness is the principal criterion for measuring the performance of an information retrieval system. The effectiveness of a retrieval system depends primarily on the extent to which it can retrieve wanted documents without retrieving unwanted ones. So, ultimately, effectiveness is a function of the relevant and nonrelevant documents retrieved. Consequently, 'relevance' of information to the user's request has become one of the most fundamental concept encountered in the theory of information retrieval. Although there is at present no consensus as to how this notion should be defined, relevance has been widely used as a meaningful quantity and an adequate criterion for measures of the evaluation of retrieval effectiveness. The recall and precision among various parameters based on the 'two-by-two' table (or, contingency table) were major considerations in this paper, because it is assumed that recall and precision are sufficient for the measurement of effectiveness. Accordingly, different concepts of 'relevance' and 'pertinence' of documents to user requests and their proper usages were investigated even though the two terms have unfortunately been used rather loosely in the literature. In addition, a number of variables affecting the recall and precision values were discussed. Some conclusions derived from this study are as follows: Any notion of retrieval effectiveness is based on 'relevance' which itself is extremely difficult to define. Recall and precision are valuable concepts in the study of any information retrieval system. They are, however, not the only criteria by which a system may be judged. The recall-precision curve represents the average performance of any given system, and this may vary quite considerably in particular situations. Therefore, it is possible to some extent to vary the indexing policy, the indexing policy, the indexing language, or the search methodology to improve the performance of the system in terms of recall and precision. The 'inverse relationship' between average recall and precision could be accepted as the 'fundamental law of retrieval', and it should certainly be used as an aid to evaluation. Finally, there is a limit to the performance(in terms of effectiveness) achievable by an information retrieval system. That is : "Perfect retrieval is impossible."
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윤구호,Yoon Koo Ho 한국문헌정보학회 1989 한국문헌정보학회지 Vol.16 No.-
Retrieval effectiveness is the principal criteria for measuring the performance of an information retrieval system. This paper deals with the characteristics of 'relevance' of information and various measuring techniques of retrieval effectivess. The outlines of this study are as follows: 1) Relevance decision for evaluation should be devided into the user-oriented and the system-oriented decisions. 2) The recall-precision measure seems to be user-oriented, and the recall-fallout measure to be system-oriented. 3) Many of composite measures can not be justified III any rational manner unfortunately. 4) The Swets model has demonstrated that it yields, in general, a straight line instead of a curve of varying curvature and emphasized the fundamentally probabilistic nature of information retrieval. 5) The Cooper model seems to be a good substitute for precision and a useful measure for systems which ranked documents. 6) The Rocchio model were proposed for the evaluation of retreval systems which ranked documents, and were designed to be independent of cut-off. 7) The Cawkell model suggested that the Shannon's equation for entropy can be applied to measuring of retrieval effectiveness.
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계량서지학적(計量書誌學的) 연구(硏究)의 이론(理論)과 실제(實際)
윤구호,Yoon, Koo-Ho 한국과학기술정보연구원 과학기술정보센터 1989 Journal of Information Science Theory and Practice Vol.20 No.1
The field of bibliometrics and its applications are extensive. This paper deals with firstly the origin and development as well as definition of bibliometrics, secondly the research areas and basic laws in the field, thirdly the various techniques used in bibliometric analyses according to the fundamental bibliometric data : publications. references and citations, and producers of scientific publications, and finally the applications of bibliometric techniques, including those in librarianship and information management, and those in the study of science and scientists. 계량서지학(計量書誌學)과 그 응용분야(應用分野)는 매우 광범위하다. 본고(本稿)는 첫째로 계량서지학적(計量書誌學的)의 기원 및 정의를 간략히 살펴보고, 둘째로 계량서지학적(計量書誌學的) 연구(硏究)모델과 기본법칙(基本法則)을 분석해 보고, 셋째로 계량서지학적(計量書誌學的) 분석기법(分析技法)을 분석대상(分析對象)데이터별(別)로 고찰해 보고, 마지막으로 량서지학(計量書誌學)의 적용분야(適用分野)를 구명해 봄으로써 계량서지학적(計量書誌學的) 연구(硏究)를 촉진하고자 한다.
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윤구호 韓國圖書館學會 1989 圖書館學 Vol.16 No.1
Retrieval effectiveness is the principal criteria for measuring the performance of an information retrieval system. This paper deals with the characteristics of 'relevance' of information and various measuring techniques of retrieval effectivess. The outlines of this study are as follows: 1) Relevance decision for evaluation should be devided into the user-oriented and system-oriented decision. 2) The recall-precision measure seems to be user-oriented, and the recall-fallout measure to be system-oriented. 3) Many of composite measures can not be justified in any rational manner unfortunately. 4) The Swets model has demonstrated that it yields, in general, a straight line instead of a curve of varying curvature and emphasized the fundamentally probabilistic nature of information retrieval. 5) The Cooper model seems to be a good substitute for precision and a useful measure for systems which ranked documents. 6) The Rocchio model were proposed for the evaluation of retreval systems which ranked documents, and were designed to be independent of cut-off. 7) The Cawkell model suggested that the Shannon's equation for entropy can be applied to measuring of retrieval effectiveness
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