-
Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
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- Date
- 30. 3.2001 13:32:22
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
O'Donnell, R.; Smeaton, A.F.: ¬A linguistic approach to information retrieval (1996)
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- Abstract
- An important aspect of information retrieval systems is domain independence, where the subject of the information is not restricted to certain domains of knowledge. This should be able to represent any topic and although the text representation does not involve any semantic knowledge, lexical and syntactic analysis of the text allows the representation to remain domain independent. Reports research at Dublin City University, Ireland, which concentrates on the lexical and syntactic levels of natural language analysis and describes a domain independent automatic information retrieval system which accesses a very large database of newspaper text from the Wall Street Journal. The system represents the text in the form of syntax trees, and these trees are used in the matching process. Reports early results from the stuyd
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Richardson, R.; Smeaton, A.F.; Murphy, J.: Using WordNet for conceptual distance measurement (1996)
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- Abstract
- Reports results of research to develop an information retrieval technique employing a conceptual distance measure between words and based on a large thesaurus. The techniques is specifically designed for data sharing in large scale autonomous distributed federated databases (FDBS). The prototype federated dictionary system, FEDDICT, stores information on the location of data sets within the FDBS and on semantic relationships exisitng between these data sets. WordNet is used and tested as the medium for bulding and operating FEDDICT
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Kelledy, F.; Smeaton, A.F.: Signature files and beyond (1996)
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- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Smeaton, A.F.: Retrieving information from hypertext : issues and problems (1991)
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- Abstract
- Hypertext uses a browsing rather than a searching strategy. Hypertext systems have found applications in a number of areas. They give users choice of information but this can prove a drawback. Examnines the effectiveness of hypertext as a way of retrieving information and reviews conventional information retrieval techniques. Considers previous attempts at combining information retrieval and hypertext and outlines a prototype systems developed to generate guided tours for users to direct them through hypertext to information they have requested. Discusses how adding this kind of itelligent guidance to a hypertext system would affect its usability as an information system
-
Keenan, S.; Smeaton, A.F.; Keogh, G.: ¬The effect of pool depth on system evaluation in TREC (2001)
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- Abstract
- The TREC benchmarking exercise for information retrieval (IR) experiments has provided a forum and an opportunity for IR researchers to evaluate the performance of their approaches to the IR task and has resulted in improvements in IR effectiveness. Typically, retrieval performance has been measured in terms of precision and recall, and comparisons between different IR approaches have been based on these measures. These measures are in turn dependent on the so-called "pool depth" used to discover relevant documents. Whereas there is evidence to suggest that the pool depth size used for TREC evaluations adequately identifies the relevant documents in the entire test data collection, we consider how it affects the evaluations of individual systems. The data used comes from the Sixth TREC conference, TREC-6. By fitting appropriate regression models we explore whether different pool depths confer advantages or disadvantages on different retrieval systems when they are compared. As a consequence of this model fitting, a pair of measures for each retrieval run, which are related to precision and recall, emerge. For each system, these give an extrapolation for the number of relevant documents the system would have been deemed to have retrieved if an indefinitely large pool size had been used, and also a measure of the sensitivity of each system to pool size. We concur that even on the basis of analyses of individual systems, the pool depth of 100 used by TREC is adequate
-
Richardson, R.; Smeaton, A.F.: Automatic word sense disambiguation in a KBIR application (1995)
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- Abstract
- Discusses the implementation and design of an automatic word sense disambiguator. The semantic tagger is used in an overall Knowledge Based Information Retrieval (KBIR) system which uses a WordNet derived knowledge base (KB) and 2 independent semantic similarity estimators. The KB is used as a controlled vocabulary to represent documents and queries and the semantic similarity estimators are employed to determine the degree of relatedness between the KB representations
-
Agosti, M.; Smeaton, A.F.: Information retrieval and hypertext (1996)
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- COMPASS
- Information retrieval
- LCSH
- Information retrieval
- Subject
- Information retrieval
Information retrieval
-
Smeaton, A.F.: Prospects for intelligent, language-based information retrieval (1991)
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- Abstract
- Current approaches to text retrieval based on indexing by words or index terms and on retrieving by specifying a Boolean combination of keywords are well known, as are their limitations. Statistical approaches to retrieval, as exemplified in commercial products like STATUS/IQ and Personal Librarian, are slightly better but still have their own weaknesses. Approaches to the indexing and retrieval of text based on techniques of automatic natural language processing (NLP) may soon start to realise their potential in terms of improving the quality and effectiveness of information retrieval. Examines some of the current attempts at using various NLP techniques in both the indexing and retrieval operations
-
Kelledy, F.; Smeaton, A.F.: Thresholding the postings lists in information retrieval : experiments on TREC data (1995)
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- Abstract
- A variety of methods for speeding up the response time of information retrieval processes have been put forward, one of which is the idea of thresholding. Thresholding relies on the data in information retrieval storage structures being organised to allow cut-off points to be used during processing. These cut-off points or thresholds are designed and ised to reduce the amount of information processed and to maintain the quality or minimise the degradation of response to a user's query. TREC is an annual series of benchmarking exercises to compare indexing and retrieval techniques. Reports experiments with a portion of the TREC data where features are introduced into the retrieval process to improve response time. These features improve response time while maintaining the same level of retrieval effectiveness
-
Smeaton, A.F.: Progress in the application of natural language processing to information retrieval tasks (1992)
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- Abstract
- Account of recent developments in automatic and semi-automatic text indexing as well as in the generation of thesauri, text retrieval, abstracting and summarization
-
Smeaton, A.F.: Information retrieval and hypertext : competing technologies or complementary access methods (1992)
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Smeaton, A.F.; Kelledy, L.; O'Donnell, R.: TREC-4 experiments at Dublin City University : thresholding posting lists, query expansion with WordNet and POS tagging of Spanish (1996)
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- Source
- The Fourth Text Retrieval Conference (TREC-4). Ed.: K. Harman
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Smeaton, A.F.: Natural language processing used in information retrieval tasks : an overview of achievements to date (1995)
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Kelledy, L.; Smeaton, A.F.: TREC-5 experiments at Dublin City University : Query space reduction, Spanish & character shape encoding (1997)
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- Source
- The Fifth Text Retrieval Conference (TREC-5). Ed.: E.M. Voorhees u. D.K. Harman
-
Smeaton, A.F.; Harman, D.: ¬The TREC experiments and their impact on Europe (1997)
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- Abstract
- Reviews the overall results of the TREC experiments in information retrieval, which differed from other information retrieval research projects in that the document collections used in the research were massive, and the groups participating in the collaborative evaluation are among the main organizations in the field. Reviews the findings of TREC, the way in which it operates and the specialist 'tracks' it supports and concentrates on european involvement in TREC, examining the participants and the emergence of European TREC like exercises
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Thornley, C.V.; Johnson, A.C.; Smeaton, A.F.; Lee, H.: ¬The scholarly impact of TRECVid (2003-2009) (2011)
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- Abstract
- This paper reports on an investigation into the scholarly impact of the TRECVid (Text Retrieval and Evaluation Conference, Video Retrieval Evaluation) benchmarking conferences between 2003 and 2009. The contribution of TRECVid to research in video retrieval is assessed by analyzing publication content to show the development of techniques and approaches over time and by analyzing publication impact through publication numbers and citation analysis. Popular conference and journal venues for TRECVid publications are identified in terms of number of citations received. For a selection of participants at different career stages, the relative importance of TRECVid publications in terms of citations vis à vis their other publications is investigated. TRECVid, as an evaluation conference, provides data on which research teams 'scored' highly against the evaluation criteria and the relationship between 'top scoring' teams at TRECVid and the 'top scoring' papers in terms of citations is analyzed. A strong relationship was found between 'success' at TRECVid and 'success' at citations both for high scoring and low scoring teams. The implications of the study in terms of the value of TRECVid as a research activity, and the value of bibliometric analysis as a research evaluation tool, are discussed.
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Smeaton, A.F.; Morrissey, P.J.: Experiments on the automatic construction of hypertext from texts (1995)
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- Abstract
- Describes an approach to semi-automatically generate a hypertext from linear texts, based on initially creatign nodes and composite nodes composed of 'mini-hypertexts'. Node-node similarity values are computed using standard information retrieval techniques and these similarity measures are then used to selectively create node-node links based on the strength of similarity between them. The process is a novel one because the link creation process also uses values from a dynamically computed metric which measures the topological compactness of the overall hypertext being generated. Describes experiments on generating a hypertext from a collection of 846 software product descriptions comprising 8,5 MBytes of text which yield some guidelines on how the process should be automated. This text to hypertext conversion method is put into the context of an overall hypertext authoring tool currently under development
