Search (40 results, page 1 of 2)

Crestani, F.: Combination of similarity measures for effective spoken document retrieval (2003) 0.07

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Source: Journal of information science. 29(2003) no.2, S.87-96
Year: 2003

Losada, D.E.; Barreiro, A.: Emebedding term similarity and inverse document frequency into a logical model of information retrieval (2003) 0.04

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Date: 22. 3.2003 19:27:23
Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.285-301
Year: 2003

Crestani, F.; Dominich, S.; Lalmas, M.; Rijsbergen, C.J.K. van: Mathematical, logical, and formal methods in information retrieval : an introduction to the special issue (2003) 0.03

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Date: 22. 3.2003 19:27:36
Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.281-284
Year: 2003

Campos, L.M. de; Fernández-Luna, J.M.; Huete, J.F.: Implementing relevance feedback in the Bayesian network retrieval model (2003) 0.03

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Date: 22. 3.2003 19:30:19
Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.302-313
Year: 2003

Song, D.; Bruza, P.D.: Towards context sensitive information inference (2003) 0.03

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Date: 22. 3.2003 19:35:46
Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.321-334
Year: 2003

Furner, J.: ¬A unifying model of document relatedness for hybrid search engines (2003) 0.02

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Date: 11. 9.2004 17:32:22
Year: 2003

Aizawa, A.: ¬An information-theoretic perspective of tf-idf measures (2003) 0.02

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Source: Information processing and management. 39(2003) no.1, S.45-65
Year: 2003

Heinz, S.; Zobel, J.: Efficient single-pass index construction for text databases (2003) 0.02

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.8, S.713-729
Year: 2003

López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Genetic algorithms in relevance feedback : a second test and new contributions (2003) 0.02

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Source: Information processing and management. 39(2003) no.5, S.669-687
Year: 2003

Nie, J.-Y.: Query expansion and query translation as logical inference (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.335-346
Year: 2003

Thelwall, M.: Can Google's PageRank be used to find the most important academic Web pages? (2003) 0.01

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Source: Journal of documentation. 59(2003) no.2, S.205-217
Year: 2003

Picard, J.; Savoy, J.: Enhancing retrieval with hyperlinks : a general model based on propositional argumentation systems (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.347-355
Year: 2003

Chen, H.; Lally, A.M.; Zhu, B.; Chau, M.: HelpfulMed : Intelligent searching for medical information over the Internet (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.7, S.683-694
Year: 2003

Hoenkamp, E.: Unitary operators on the document space (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.4, S.314-320
Year: 2003

Watters, C.; Amoudi, A.: Geosearcher : location-based ranking of search engine results (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.2, S.140-151
Year: 2003

López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.2, S.152-160
Year: 2003

Ruthven, T.; Lalmas, M.; Rijsbergen, K.van: Incorporating user research behavior into relevance feedback (2003) 0.01

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Source: Journal of the American Society for Information Science and technology. 54(2003) no.6, S.528-548
Year: 2003

Herrera-Viedma, E.; Cordón, O.; Herrera, J.C.; Luqe, M.: ¬An IRS based on multi-granular lnguistic information (2003) 0.01

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Year: 2003

Lopez-Pujalte, C.; Guerrero Bote, V.P.; Moya-Anegón, F. de: Evaluation of the application of genetic algorithms to relevance feedback (2003) 0.01

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Year: 2003

Bar-Ilan, J.; Levene, M.; Mat-Hassan, M.: Methods for evaluating dynamic changes in search engine rankings : a case study (2006) 0.01
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Abstract

Purpose - The objective of this paper is to characterize the changes in the rankings of the top ten results of major search engines over time and to compare the rankings between these engines. Design/methodology/approach - The papers compare rankings of the top-ten results of the search engines Google and AlltheWeb on ten identical queries over a period of three weeks. Only the top-ten results were considered, since users do not normally inspect more than the first results page returned by a search engine. The experiment was repeated twice, in October 2003 and in January 2004, in order to assess changes to the top-ten results of some of the queries during the three months interval. In order to assess the changes in the rankings, three measures were computed for each data collection point and each search engine. Findings - The findings in this paper show that the rankings of AlltheWeb were highly stable over each period, while the rankings of Google underwent constant yet minor changes, with occasional major ones. Changes over time can be explained by the dynamic nature of the web or by fluctuations in the search engines' indexes. The top-ten results of the two search engines had surprisingly low overlap. With such small overlap, the task of comparing the rankings of the two engines becomes extremely challenging. Originality/value - The paper shows that because of the abundance of information on the web, ranking search results is of extreme importance. The paper compares several measures for computing the similarity between rankings of search tools, and shows that none of the measures is fully satisfactory as a standalone measure. It also demonstrates the apparent differences in the ranking algorithms of two widely used search engines.

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