-
Vechtomova, O.: Facet-based opinion retrieval from blogs (2010)
0.05
0.050106924 = product of:
0.075160384 = sum of:
0.052695833 = weight(_text_:resources in 4225) [ClassicSimilarity], result of:
0.052695833 = score(doc=4225,freq=2.0), product of:
0.18665522 = queryWeight, product of:
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.051133685 = queryNorm
0.28231642 = fieldWeight in 4225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.0546875 = fieldNorm(doc=4225)
0.022464553 = product of:
0.044929106 = sum of:
0.044929106 = weight(_text_:management in 4225) [ClassicSimilarity], result of:
0.044929106 = score(doc=4225,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.2606825 = fieldWeight in 4225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0546875 = fieldNorm(doc=4225)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- The paper presents methods of retrieving blog posts containing opinions about an entity expressed in the query. The methods use a lexicon of subjective words and phrases compiled from manually and automatically developed resources. One of the methods uses the Kullback-Leibler divergence to weight subjective words occurring near query terms in documents, another uses proximity between the occurrences of query terms and subjective words in documents, and the third combines both factors. Methods of structuring queries into facets, facet expansion using Wikipedia, and a facet-based retrieval are also investigated in this work. The methods were evaluated using the TREC 2007 and 2008 Blog track topics, and proved to be highly effective.
- Source
- Information processing and management. 46(2010) no.1, S.71-88
-
Hider, P.: ¬The search value added by professional indexing to a bibliographic database (2018)
0.03
0.025093256 = product of:
0.075279765 = sum of:
0.075279765 = weight(_text_:resources in 4300) [ClassicSimilarity], result of:
0.075279765 = score(doc=4300,freq=8.0), product of:
0.18665522 = queryWeight, product of:
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.051133685 = queryNorm
0.40330917 = fieldWeight in 4300, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.0390625 = fieldNorm(doc=4300)
0.33333334 = coord(1/3)
- Abstract
- Gross et al. (2015) have demonstrated that about a quarter of hits would typically be lost to keyword searchers if contemporary academic library catalogs dropped their controlled subject headings. This article reports on an investigation of the search value that subject descriptors and identifiers assigned by professional indexers add to a bibliographic database, namely the Australian Education Index (AEI). First, a similar methodology to that developed by Gross et al. (2015) was applied, with keyword searches representing a range of educational topics run on the AEI database with and without its subject indexing. The results indicated that AEI users would also lose, on average, about a quarter of hits per query. Second, an alternative research design was applied in which an experienced literature searcher was asked to find resources on a set of educational topics on an AEI database stripped of its subject indexing and then asked to search for additional resources on the same topics after the subject indexing had been reinserted. In this study, the proportion of additional resources that would have been lost had it not been for the subject indexing was again found to be about a quarter of the total resources found for each topic, on average.
-
Ravana, S.D.; Taheri, M.S.; Rajagopal, P.: Document-based approach to improve the accuracy of pairwise comparison in evaluating information retrieval systems (2015)
0.02
0.022243923 = product of:
0.066731766 = sum of:
0.066731766 = sum of:
0.032092217 = weight(_text_:management in 2587) [ClassicSimilarity], result of:
0.032092217 = score(doc=2587,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.18620178 = fieldWeight in 2587, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0390625 = fieldNorm(doc=2587)
0.034639545 = weight(_text_:22 in 2587) [ClassicSimilarity], result of:
0.034639545 = score(doc=2587,freq=2.0), product of:
0.17906146 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051133685 = queryNorm
0.19345059 = fieldWeight in 2587, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2587)
0.33333334 = coord(1/3)
- Date
- 20. 1.2015 18:30:22
- Source
- Aslib journal of information management. 67(2015) no.4, S.408-421
-
Rajagopal, P.; Ravana, S.D.; Koh, Y.S.; Balakrishnan, V.: Evaluating the effectiveness of information retrieval systems using effort-based relevance judgment (2019)
0.02
0.022243923 = product of:
0.066731766 = sum of:
0.066731766 = sum of:
0.032092217 = weight(_text_:management in 5287) [ClassicSimilarity], result of:
0.032092217 = score(doc=5287,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.18620178 = fieldWeight in 5287, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0390625 = fieldNorm(doc=5287)
0.034639545 = weight(_text_:22 in 5287) [ClassicSimilarity], result of:
0.034639545 = score(doc=5287,freq=2.0), product of:
0.17906146 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051133685 = queryNorm
0.19345059 = fieldWeight in 5287, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=5287)
0.33333334 = coord(1/3)
- Date
- 20. 1.2015 18:30:22
- Source
- Aslib journal of information management. 71(2019) no.1, S.2-17
-
Hider, P.: ¬The search value added by professional indexing to a bibliographic database (2017)
0.02
0.021731397 = product of:
0.06519419 = sum of:
0.06519419 = weight(_text_:resources in 3868) [ClassicSimilarity], result of:
0.06519419 = score(doc=3868,freq=6.0), product of:
0.18665522 = queryWeight, product of:
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.051133685 = queryNorm
0.349276 = fieldWeight in 3868, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.0390625 = fieldNorm(doc=3868)
0.33333334 = coord(1/3)
- Abstract
- Gross et al. (2015) have demonstrated that about a quarter of hits would typically be lost to keyword searchers if contemporary academic library catalogs dropped their controlled subject headings. This paper reports on an analysis of the loss levels that would result if a bibliographic database, namely the Australian Education Index (AEI), were missing the subject descriptors and identifiers assigned by its professional indexers, employing the methodology developed by Gross and Taylor (2005), and later by Gross et al. (2015). The results indicate that AEI users would lose a similar proportion of hits per query to that experienced by library catalog users: on average, 27% of the resources found by a sample of keyword queries on the AEI database would not have been found without the subject indexing, based on the Australian Thesaurus of Education Descriptors (ATED). The paper also discusses the methodological limitations of these studies, pointing out that real-life users might still find some of the resources missed by a particular query through follow-up searches, while additional resources might also be found through iterative searching on the subject vocabulary. The paper goes on to describe a new research design, based on a before - and - after experiment, which addresses some of these limitations. It is argued that this alternative design will provide a more realistic picture of the value that professionally assigned subject indexing and controlled subject vocabularies can add to literature searching of a more scholarly and thorough kind.
-
Tamine, L.; Chouquet, C.; Palmer, T.: Analysis of biomedical and health queries : lessons learned from TREC and CLEF evaluation benchmarks (2015)
0.01
0.012546628 = product of:
0.037639882 = sum of:
0.037639882 = weight(_text_:resources in 2341) [ClassicSimilarity], result of:
0.037639882 = score(doc=2341,freq=2.0), product of:
0.18665522 = queryWeight, product of:
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.051133685 = queryNorm
0.20165458 = fieldWeight in 2341, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.650338 = idf(docFreq=3122, maxDocs=44218)
0.0390625 = fieldNorm(doc=2341)
0.33333334 = coord(1/3)
- Abstract
- A large body of research work examined, from both the query side and the user behavior side, the characteristics of medical- and health-related searches. One of the core issues in medical information retrieval (IR) is diversity of tasks that lead to diversity of categories of information needs and queries. From the evaluation perspective, another related and challenging issue is the limited availability of appropriate test collections allowing the experimental validation of medically task oriented IR techniques and systems. In this paper, we explore the peculiarities of TREC and CLEF medically oriented tasks and queries through the analysis of the differences and the similarities between queries across tasks, with respect to length, specificity, and clarity features and then study their effect on retrieval performance. We show that, even for expert oriented queries, language specificity level varies significantly across tasks as well as search difficulty. Additional findings highlight that query clarity factors are task dependent and that query terms specificity based on domain-specific terminology resources is not significantly linked to term rareness in the document collection. The lessons learned from our study could serve as starting points for the design of future task-based medical information retrieval frameworks.
-
Reichert, S.; Mayr, P.: Untersuchung von Relevanzeigenschaften in einem kontrollierten Eyetracking-Experiment (2012)
0.01
0.0069279084 = product of:
0.020783724 = sum of:
0.020783724 = product of:
0.04156745 = sum of:
0.04156745 = weight(_text_:22 in 328) [ClassicSimilarity], result of:
0.04156745 = score(doc=328,freq=2.0), product of:
0.17906146 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051133685 = queryNorm
0.23214069 = fieldWeight in 328, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=328)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 7.2012 19:25:54
-
Leiva-Mederos, A.; Senso, J.A.; Hidalgo-Delgado, Y.; Hipola, P.: Working framework of semantic interoperability for CRIS with heterogeneous data sources (2017)
0.01
0.006051367 = product of:
0.018154101 = sum of:
0.018154101 = product of:
0.036308203 = sum of:
0.036308203 = weight(_text_:management in 3706) [ClassicSimilarity], result of:
0.036308203 = score(doc=3706,freq=4.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.21066327 = fieldWeight in 3706, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.03125 = fieldNorm(doc=3706)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Purpose Information from Current Research Information Systems (CRIS) is stored in different formats, in platforms that are not compatible, or even in independent networks. It would be helpful to have a well-defined methodology to allow for management data processing from a single site, so as to take advantage of the capacity to link disperse data found in different systems, platforms, sources and/or formats. Based on functionalities and materials of the VLIR project, the purpose of this paper is to present a model that provides for interoperability by means of semantic alignment techniques and metadata crosswalks, and facilitates the fusion of information stored in diverse sources. Design/methodology/approach After reviewing the state of the art regarding the diverse mechanisms for achieving semantic interoperability, the paper analyzes the following: the specific coverage of the data sets (type of data, thematic coverage and geographic coverage); the technical specifications needed to retrieve and analyze a distribution of the data set (format, protocol, etc.); the conditions of re-utilization (copyright and licenses); and the "dimensions" included in the data set as well as the semantics of these dimensions (the syntax and the taxonomies of reference). The semantic interoperability framework here presented implements semantic alignment and metadata crosswalk to convert information from three different systems (ABCD, Moodle and DSpace) to integrate all the databases in a single RDF file. Findings The paper also includes an evaluation based on the comparison - by means of calculations of recall and precision - of the proposed model and identical consultations made on Open Archives Initiative and SQL, in order to estimate its efficiency. The results have been satisfactory enough, due to the fact that the semantic interoperability facilitates the exact retrieval of information. Originality/value The proposed model enhances management of the syntactic and semantic interoperability of the CRIS system designed. In a real setting of use it achieves very positive results.
-
Pal, S.; Mitra, M.; Kamps, J.: Evaluation effort, reliability and reusability in XML retrieval (2011)
0.01
0.0057732575 = product of:
0.017319772 = sum of:
0.017319772 = product of:
0.034639545 = sum of:
0.034639545 = weight(_text_:22 in 4197) [ClassicSimilarity], result of:
0.034639545 = score(doc=4197,freq=2.0), product of:
0.17906146 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051133685 = queryNorm
0.19345059 = fieldWeight in 4197, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=4197)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 1.2011 14:20:56
-
Chu, H.: Factors affecting relevance judgment : a report from TREC Legal track (2011)
0.01
0.0057732575 = product of:
0.017319772 = sum of:
0.017319772 = product of:
0.034639545 = sum of:
0.034639545 = weight(_text_:22 in 4540) [ClassicSimilarity], result of:
0.034639545 = score(doc=4540,freq=2.0), product of:
0.17906146 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051133685 = queryNorm
0.19345059 = fieldWeight in 4540, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=4540)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 12. 7.2011 18:29:22
-
Wildemuth, B.; Freund, L.; Toms, E.G.: Untangling search task complexity and difficulty in the context of interactive information retrieval studies (2014)
0.01
0.0057732575 = product of:
0.017319772 = sum of:
0.017319772 = product of:
0.034639545 = sum of:
0.034639545 = weight(_text_:22 in 1786) [ClassicSimilarity], result of:
0.034639545 = score(doc=1786,freq=2.0), product of:
0.17906146 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051133685 = queryNorm
0.19345059 = fieldWeight in 1786, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1786)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 6. 4.2015 19:31:22
-
Sünkler, S.: Prototypische Entwicklung einer Software für die Erfassung und Analyse explorativer Suchen in Verbindung mit Tests zur Retrievaleffektivität (2012)
0.01
0.005348703 = product of:
0.016046109 = sum of:
0.016046109 = product of:
0.032092217 = sum of:
0.032092217 = weight(_text_:management in 479) [ClassicSimilarity], result of:
0.032092217 = score(doc=479,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.18620178 = fieldWeight in 479, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0390625 = fieldNorm(doc=479)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Content
- Masterarbeit im Studiengang Informationswissenschaft und -management.
-
Angelini, M.; Fazzini, V.; Ferro, N.; Santucci, G.; Silvello, G.: CLAIRE: A combinatorial visual analytics system for information retrieval evaluation (2018)
0.01
0.005348703 = product of:
0.016046109 = sum of:
0.016046109 = product of:
0.032092217 = sum of:
0.032092217 = weight(_text_:management in 5049) [ClassicSimilarity], result of:
0.032092217 = score(doc=5049,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.18620178 = fieldWeight in 5049, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0390625 = fieldNorm(doc=5049)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Information processing and management. 54(2018) no.6, S.1077-1100
-
Losada, D.E.; Parapar, J.; Barreiro, A.: Multi-armed bandits for adjudicating documents in pooling-based evaluation of information retrieval systems (2017)
0.01
0.005348703 = product of:
0.016046109 = sum of:
0.016046109 = product of:
0.032092217 = sum of:
0.032092217 = weight(_text_:management in 5098) [ClassicSimilarity], result of:
0.032092217 = score(doc=5098,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.18620178 = fieldWeight in 5098, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0390625 = fieldNorm(doc=5098)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Information processing and management. 53(2017) no.5, S.1005-1025
-
White, H.D.: Relevance theory and distributions of judgments in document retrieval (2017)
0.01
0.005348703 = product of:
0.016046109 = sum of:
0.016046109 = product of:
0.032092217 = sum of:
0.032092217 = weight(_text_:management in 5099) [ClassicSimilarity], result of:
0.032092217 = score(doc=5099,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.18620178 = fieldWeight in 5099, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.0390625 = fieldNorm(doc=5099)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Information processing and management. 53(2017) no.5, S.1080-1102
-
Kutlu, M.; Elsayed, T.; Lease, M.: Intelligent topic selection for low-cost information retrieval evaluation : a new perspective on deep vs. shallow judging (2018)
0.00
0.0042789625 = product of:
0.0128368875 = sum of:
0.0128368875 = product of:
0.025673775 = sum of:
0.025673775 = weight(_text_:management in 5092) [ClassicSimilarity], result of:
0.025673775 = score(doc=5092,freq=2.0), product of:
0.17235184 = queryWeight, product of:
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.051133685 = queryNorm
0.14896142 = fieldWeight in 5092, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3706124 = idf(docFreq=4130, maxDocs=44218)
0.03125 = fieldNorm(doc=5092)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Information processing and management. 54(2018) no.1, S.37-59
