Number of found records: 31
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PERRIN, Patrick; PETRY, Frederick E. |
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Extraction and representation of contextual information for knowledge discovery in texts. |
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Information Sciences, Vol. 151, May 2003, p. 125-152. |
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On line (06/05/2005) |
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This paper studies the role of lexical contextual relations for the problem of unsupervised knowledge discovery in full texts. Narrative texts have inherent structure dictated by language usage in generating them. We suggest that the relative distance of terms within a text gives sufficient information about its structure and its relevant content. Furthermore, this structure can be used to discover implicit knowledge embedded in the text, therefore serving as a good candidate to represent effectively the text content for knowledge elicitation tasks. We qualitatively demonstrate that a useful text structure and content can be systematically extracted by collocational lexical analysis without the need to encode any supplemental sources of knowledge. We present an algorithm that systematically extracts the most relevant facts in the texts and labels them by their overall theme, dictated by local contextual information. It exploits domain independent lexical frequencies and mutual information measures to find the relevant contextual units in the texts. We report results from experiments in a real-world textual database of psychiatric evaluation reports. (AU) |
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Text mining; Extraction and selection; Text representation |
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PINTO, María; GÁLVEZ, Carmen |
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Paradigms for abstracting systems |
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Journal of information science 1999 25 (5)365-380 |
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On line ( 15/06/2004)(Only UGR) |
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The growing number and electronic and non electronic documents, has increased the value of abstracting and the importance of indexing and abstracting systems and services, as useful tools for summarizing and sustitution of relevant information. Four models ( communicative, physical, cognitive and systematic) are identified and described here setting the pace for the most significant investigation lines in this area. (DB) |
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Abstracting systems; abstracts; paradigms/research |
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BABIK, Wieslay |
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Knowledge representation in map collections for information retrieval systems. |
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LIBER Quarterly, the journal of European research libraries, ISSN 1435-5205, Vol. 9(1999), No 2. |
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On line ( 15/06/2004) |
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This deals with representation of knowledge from the perspective of information retrieval referring to library special holdings, such as maps, both from physical and virtual retrieval, through the Internet. The use of linguistic methods for representing cartographic information is a field of study of special interest. (DB) |
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knowledge representation; information retrieval systems; libraries; map collections; linguistic methods |
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BINWAL, J.C.; LALHMACHHUANA |
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Knowledge representation: concept, techniques and the analytico-synthetic paradigm |
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Knowledge Organization, 2001, vol.28, n.1, p. 5-16. |
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Defines the concept of knowledge representation. Explains the major AI (Artificial Intelligence)-based knowledge representation techniques developed so far. Critically examines the strengths and weaknesses of such AI techniques. Argues that the analytico-synthetic approach advocated by Ranganathan is really a powerful knowledge representation technique containing in itself the epistemological foundations required for real progress in the field. |
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knowledge representation; artificial intelligence; analytico-synthetic paradigm |
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