-
LaBarre, K.; Cochrane, P.A.: Facet analysis as a knowledge management tool on the Internet (2006)
0.08
0.07858993 = product of:
0.15717986 = sum of:
0.020873476 = weight(_text_:retrieval in 1489) [ClassicSimilarity], result of:
0.020873476 = score(doc=1489,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.16710453 = fieldWeight in 1489, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=1489)
0.021389665 = weight(_text_:use in 1489) [ClassicSimilarity], result of:
0.021389665 = score(doc=1489,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 1489, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=1489)
0.01850135 = weight(_text_:of in 1489) [ClassicSimilarity], result of:
0.01850135 = score(doc=1489,freq=22.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.28651062 = fieldWeight in 1489, product of:
4.690416 = tf(freq=22.0), with freq of:
22.0 = termFreq=22.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=1489)
0.09641537 = sum of:
0.024675604 = weight(_text_:on in 1489) [ClassicSimilarity], result of:
0.024675604 = score(doc=1489,freq=10.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.271686 = fieldWeight in 1489, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=1489)
0.07173977 = weight(_text_:line in 1489) [ClassicSimilarity], result of:
0.07173977 = score(doc=1489,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.30979243 = fieldWeight in 1489, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0390625 = fieldNorm(doc=1489)
0.5 = coord(4/8)
- Abstract
- In 2001, a group of information architects involved in designing websites, and knowledge management specialists involved in creating access to corporate knowledge bases appeared to have re-discovered facet analysis and faceted classification. These groups have been instrumental in creating new and different ways of handling digital content of the Internet. Some of these practitioners explicitly use the forms and language of facet analysis and faceted classification, while others seem to do so implicitly. Following a brief overview of the work and discussions on facets and faceted classification in recent years, we focus on our observations about new information resources which seem more in line with the Fourth law of Library Science ("Save the time of the reader") than most library OPACs today. These new developments on the Internet point to a partial grasp of a disciplined approach to subject access. This is where Ranganathan and Neelameghan's approach needs to be reviewed for the new audience of information system designers. A report on the work undertaken by us forms a principal part of this paper.
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Faaborg, A.; Lagoze, C.: Semantic browsing (2003)
0.08
0.07509575 = product of:
0.120153196 = sum of:
0.029222867 = weight(_text_:retrieval in 1026) [ClassicSimilarity], result of:
0.029222867 = score(doc=1026,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23394634 = fieldWeight in 1026, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=1026)
0.042349376 = weight(_text_:use in 1026) [ClassicSimilarity], result of:
0.042349376 = score(doc=1026,freq=4.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.33491597 = fieldWeight in 1026, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=1026)
0.015619429 = weight(_text_:of in 1026) [ClassicSimilarity], result of:
0.015619429 = score(doc=1026,freq=8.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24188137 = fieldWeight in 1026, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=1026)
0.013379549 = product of:
0.026759097 = sum of:
0.026759097 = weight(_text_:on in 1026) [ClassicSimilarity], result of:
0.026759097 = score(doc=1026,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.29462588 = fieldWeight in 1026, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=1026)
0.5 = coord(1/2)
0.019581974 = product of:
0.039163947 = sum of:
0.039163947 = weight(_text_:22 in 1026) [ClassicSimilarity], result of:
0.039163947 = score(doc=1026,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.2708308 = fieldWeight in 1026, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1026)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- We have created software applications that allow users to both author and use Semantic Web metadata. To create and use a layer of semantic content on top of the existing Web, we have (1) implemented a user interface that expedites the task of attributing metadata to resources on the Web, and (2) augmented a Web browser to leverage this semantic metadata to provide relevant information and tasks to the user. This project provides a framework for annotating and reorganizing existing files, pages, and sites on the Web that is similar to Vannevar Bushrsquos original concepts of trail blazing and associative indexing.
- Source
- Research and advanced technology for digital libraries : 7th European Conference, proceedings / ECDL 2003, Trondheim, Norway, August 17-22, 2003
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Petrelli, D.: On the role of user-centred evaluation in the advancement of interactive information retrieval (2008)
0.07
0.07308458 = product of:
0.11693532 = sum of:
0.051129367 = weight(_text_:retrieval in 2026) [ClassicSimilarity], result of:
0.051129367 = score(doc=2026,freq=12.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.40932083 = fieldWeight in 2026, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=2026)
0.021389665 = weight(_text_:use in 2026) [ClassicSimilarity], result of:
0.021389665 = score(doc=2026,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 2026, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=2026)
0.02087234 = weight(_text_:of in 2026) [ClassicSimilarity], result of:
0.02087234 = score(doc=2026,freq=28.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.32322758 = fieldWeight in 2026, product of:
5.2915025 = tf(freq=28.0), with freq of:
28.0 = termFreq=28.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=2026)
0.00955682 = product of:
0.01911364 = sum of:
0.01911364 = weight(_text_:on in 2026) [ClassicSimilarity], result of:
0.01911364 = score(doc=2026,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.21044704 = fieldWeight in 2026, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=2026)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 2026) [ClassicSimilarity], result of:
0.02797425 = score(doc=2026,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 2026, 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=2026)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- This paper discusses the role of user-centred evaluations as an essential method for researching interactive information retrieval. It draws mainly on the work carried out during the Clarity Project where different user-centred evaluations were run during the lifecycle of a cross-language information retrieval system. The iterative testing was not only instrumental to the development of a usable system, but it enhanced our knowledge of the potential, impact, and actual use of cross-language information retrieval technology. Indeed the role of the user evaluation was dual: by testing a specific prototype it was possible to gain a micro-view and assess the effectiveness of each component of the complex system; by cumulating the result of all the evaluations (in total 43 people were involved) it was possible to build a macro-view of how cross-language retrieval would impact on users and their tasks. By showing the richness of results that can be acquired, this paper aims at stimulating researchers into considering user-centred evaluations as a flexible, adaptable and comprehensive technique for investigating non-traditional information access systems.
- Footnote
- Beitrag eines Themenbereichs: Evaluation of Interactive Information Retrieval Systems
- Source
- Information processing and management. 44(2008) no.1, S.22-38
-
Doyle, B.: ¬The classification and evaluation of Content Management Systems (2003)
0.07
0.071942374 = product of:
0.1151078 = sum of:
0.033397563 = weight(_text_:retrieval in 2871) [ClassicSimilarity], result of:
0.033397563 = score(doc=2871,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.26736724 = fieldWeight in 2871, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=2871)
0.03422346 = weight(_text_:use in 2871) [ClassicSimilarity], result of:
0.03422346 = score(doc=2871,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 2871, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=2871)
0.012622404 = weight(_text_:of in 2871) [ClassicSimilarity], result of:
0.012622404 = score(doc=2871,freq=4.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.19546966 = fieldWeight in 2871, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=2871)
0.012484977 = product of:
0.024969954 = sum of:
0.024969954 = weight(_text_:on in 2871) [ClassicSimilarity], result of:
0.024969954 = score(doc=2871,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.27492687 = fieldWeight in 2871, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=2871)
0.5 = coord(1/2)
0.0223794 = product of:
0.0447588 = sum of:
0.0447588 = weight(_text_:22 in 2871) [ClassicSimilarity], result of:
0.0447588 = score(doc=2871,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.30952093 = fieldWeight in 2871, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=2871)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- This is a report on how Doyle and others made a faceted classification scheme for content management systems and made it browsable on the web (see CMS Review in Example Web Sites, below). They discuss why they did it, how, their use of OPML and XFML, how they did research to find terms and categories, and they also include their taxonomy. It is interesting to see facets used in a business environment.
- Date
- 30. 7.2004 12:22:52
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Aitken, S.; Reid, S.: Evaluation of an ontology-based information retrieval tool (2000)
0.07
0.071144685 = product of:
0.14228937 = sum of:
0.066795126 = weight(_text_:retrieval in 2862) [ClassicSimilarity], result of:
0.066795126 = score(doc=2862,freq=8.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.5347345 = fieldWeight in 2862, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=2862)
0.03422346 = weight(_text_:use in 2862) [ClassicSimilarity], result of:
0.03422346 = score(doc=2862,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 2862, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=2862)
0.023614356 = weight(_text_:of in 2862) [ClassicSimilarity], result of:
0.023614356 = score(doc=2862,freq=14.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.36569026 = fieldWeight in 2862, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=2862)
0.017656423 = product of:
0.035312846 = sum of:
0.035312846 = weight(_text_:on in 2862) [ClassicSimilarity], result of:
0.035312846 = score(doc=2862,freq=8.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.3888053 = fieldWeight in 2862, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=2862)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- This paper evaluates the use of an explicit domain ontology in an information retrieval tool. The evaluation compares the performance of ontology-enhanced retrieval with keyword retrieval for a fixed set of queries across several data sets. The robustness of the IR approach is assessed by comparing the performance of the tool on the original data set with that on previously unseen data.
- Content
- Beitrag für: Workshop on the Applications of Ontologies and Problem-Solving Methods, (eds) Gómez-Pérez, A., Benjamins, V.R., Guarino, N., and Uschold, M. European Conference on Artificial Intelligence 2000, Berlin.
-
Thornley, C.; Gibb, F.: Meaning in philosophy and meaning in information retrieval (IR) (2009)
0.07
0.07111156 = product of:
0.113778494 = sum of:
0.029519552 = weight(_text_:retrieval in 2682) [ClassicSimilarity], result of:
0.029519552 = score(doc=2682,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23632148 = fieldWeight in 2682, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=2682)
0.037047986 = weight(_text_:use in 2682) [ClassicSimilarity], result of:
0.037047986 = score(doc=2682,freq=6.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.29299045 = fieldWeight in 2682, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=2682)
0.023667008 = weight(_text_:of in 2682) [ClassicSimilarity], result of:
0.023667008 = score(doc=2682,freq=36.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.36650562 = fieldWeight in 2682, product of:
6.0 = tf(freq=36.0), with freq of:
36.0 = termFreq=36.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=2682)
0.00955682 = product of:
0.01911364 = sum of:
0.01911364 = weight(_text_:on in 2682) [ClassicSimilarity], result of:
0.01911364 = score(doc=2682,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.21044704 = fieldWeight in 2682, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=2682)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 2682) [ClassicSimilarity], result of:
0.02797425 = score(doc=2682,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 2682, 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=2682)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Purpose - The purpose of this paper is to explore the question of whether the differences between meaning in philosophy and meaning in information retrieval (IR) have implications for the use of philosophy in supporting research in IR. Design/methodology/approach - The approach takes the form of a conceptual analysis and literature review. Findings - There are some differences in the role of meaning in terms of purpose, content and use which should be clarified in order to assist a productive relationship between the philosophy of language and IR. Research limitations/implications - This provides some new theoretical insights into the philosophical context of IR. It suggests that further productive work on the central concepts within IR could be achieved through the use of a methodology which analyses how exactly these concepts are discussed in other disciplines and the implications of any differences in the way in which they may operate in IR. Originality/value - The paper suggests a new perspective on the relationship between philosophy and IR by exploring the role of meaning in these respective disciplines and highlighting differences, as well as similarities, with particular reference to the role of information as well as meaning in IR. This contributes to an understanding of two of the central concepts in IR, meaning and information, and the ways in which they are related. There is a history of work in IR and information science (IS) examining dilemmas and the paper builds on this work by relating it to some similar dilemmas in philosophy. Thus it develops the theory and conceptual understanding of IR by suggesting that philosophy could be used as a way of exploring intractable dilemmas in IR.
- Date
- 23. 2.2009 17:22:29
- Source
- Journal of documentation. 65(2009) no.1, S.133-150
-
Marion, L.S.; McCain, K.W.: Contrasting views of software engineering journals : author cocitation choices and indexer vocabulary assignments (2001)
0.07
0.07040809 = product of:
0.14081618 = sum of:
0.020873476 = weight(_text_:retrieval in 5767) [ClassicSimilarity], result of:
0.020873476 = score(doc=5767,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.16710453 = fieldWeight in 5767, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=5767)
0.021389665 = weight(_text_:use in 5767) [ClassicSimilarity], result of:
0.021389665 = score(doc=5767,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 5767, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=5767)
0.015778005 = weight(_text_:of in 5767) [ClassicSimilarity], result of:
0.015778005 = score(doc=5767,freq=16.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24433708 = fieldWeight in 5767, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=5767)
0.082775034 = sum of:
0.0110352645 = weight(_text_:on in 5767) [ClassicSimilarity], result of:
0.0110352645 = score(doc=5767,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.121501654 = fieldWeight in 5767, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=5767)
0.07173977 = weight(_text_:line in 5767) [ClassicSimilarity], result of:
0.07173977 = score(doc=5767,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.30979243 = fieldWeight in 5767, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0390625 = fieldNorm(doc=5767)
0.5 = coord(4/8)
- Abstract
- We explore the intellectual subject structure and research themes in software engineering through the identification and analysis of a core journal literature. We examine this literature via two expert perspectives: that of the author, who identified significant work by citing it (journal cocitation analysis), and that of the professional indexer, who tags published work with subject terms to facilitate retrieval from a bibliographic database (subject profile analysis). The data sources are SCISEARCH (the on-line version of Science Citation Index), and INSPEC (a database covering software engineering, computer science, and information systems). We use data visualization tools (cluster analysis, multidimensional scaling, and PFNets) to show the "intellectual maps" of software engineering. Cocitation and subject profile analyses demonstrate that software engineering is a distinct interdisciplinary field, valuing practical and applied aspects, and spanning a subject continuum from "programming-in-the-smalI" to "programming-in-the-large." This continuum mirrors the software development life cycle by taking the operating system or major application from initial programming through project management, implementation, and maintenance. Object orientation is an integral but distinct subject area in software engineering. Key differences are the importance of management and programming: (1) cocitation analysis emphasizes project management and systems development; (2) programming techniques/languages are more influential in subject profiles; (3) cocitation profiles place object-oriented journals separately and centrally while the subject profile analysis locates these journals with the programming/languages group
- Source
- Journal of the American Society for Information Science and technology. 52(2001) no.4, S.297-308
-
Croft, W.B.: Advances in information retrieval : Recent research from the Center for Intelligent Information Retrieval (2000)
0.07
0.0701737 = product of:
0.1403474 = sum of:
0.09372167 = weight(_text_:retrieval in 6860) [ClassicSimilarity], result of:
0.09372167 = score(doc=6860,freq=28.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.7502974 = fieldWeight in 6860, product of:
5.2915025 = tf(freq=28.0), with freq of:
28.0 = termFreq=28.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=6860)
0.025667597 = weight(_text_:use in 6860) [ClassicSimilarity], result of:
0.025667597 = score(doc=6860,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.20298971 = fieldWeight in 6860, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=6860)
0.011594418 = weight(_text_:of in 6860) [ClassicSimilarity], result of:
0.011594418 = score(doc=6860,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.17955035 = fieldWeight in 6860, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=6860)
0.009363732 = product of:
0.018727465 = sum of:
0.018727465 = weight(_text_:on in 6860) [ClassicSimilarity], result of:
0.018727465 = score(doc=6860,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.20619515 = fieldWeight in 6860, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=6860)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Content
- Enthält die Beiträge: CROFT, W.B.: Combining approaches to information retrieval; GREIFF, W.R.: The use of exploratory data analysis in information retrieval research; PONTE, J.M.: Language models for relevance feedback; PAPKA, R. u. J. ALLAN: Topic detection and tracking: event clustering as a basis for first story detection; CALLAN, J.: Distributed information retrieval; XU, J. u. W.B. CROFT: Topic-based language models for ditributed retrieval; LU, Z. u. K.S. McKINLEY: The effect of collection organization and query locality on information retrieval system performance; BALLESTEROS, L.A.: Cross-language retrieval via transitive translation; SANDERSON, M. u. D. LAWRIE: Building, testing, and applying concept hierarchies; RAVELA, S. u. C. LUO: Appearance-based global similarity retrieval of images
- Footnote
- Information retrieval - Relevanz - Information Retrieval Systeme - Verteilte Systeme - Multimedia - Bildverarbeitung
- LCSH
- Information retrieval
- Series
- The Kluwer international series on information retrieval; 7
- Subject
- Information retrieval
-
Slavic, A.: On the nature and typology of documentary classifications and their use in a networked environment (2007)
0.07
0.06961468 = product of:
0.11138349 = sum of:
0.025048172 = weight(_text_:retrieval in 780) [ClassicSimilarity], result of:
0.025048172 = score(doc=780,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.20052543 = fieldWeight in 780, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=780)
0.051335193 = weight(_text_:use in 780) [ClassicSimilarity], result of:
0.051335193 = score(doc=780,freq=8.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.40597942 = fieldWeight in 780, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=780)
0.011594418 = weight(_text_:of in 780) [ClassicSimilarity], result of:
0.011594418 = score(doc=780,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.17955035 = fieldWeight in 780, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=780)
0.006621159 = product of:
0.013242318 = sum of:
0.013242318 = weight(_text_:on in 780) [ClassicSimilarity], result of:
0.013242318 = score(doc=780,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.14580199 = fieldWeight in 780, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=780)
0.5 = coord(1/2)
0.016784549 = product of:
0.033569098 = sum of:
0.033569098 = weight(_text_:22 in 780) [ClassicSimilarity], result of:
0.033569098 = score(doc=780,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.23214069 = fieldWeight in 780, 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=780)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Networked orientated standards for vocabulary publishing and exchange and proposals for terminological services and terminology registries will improve sharing and use of all knowledge organization systems in the networked information environment. This means that documentary classifications may also become more applicable for use outside their original domain of application. The paper summarises some characteristics common to documentary classifications and explains some terminological, functional and implementation aspects. The original purpose behind each classification scheme determines the functions that the vocabulary is designed to facilitate. These functions influence the structure, semantics and syntax, scheme coverage and format in which classification data are published and made available. The author suggests that attention should be paid to the differences between documentary classifications as these may determine their suitability for a certain purpose and may impose different requirements with respect to their use online. As we speak, many classifications are being created for knowledge organization and it may be important to promote expertise from the bibliographic domain with respect to building and using classification systems.
- Date
- 22.12.2007 17:22:31
- Theme
- Klassifikationssysteme im Online-Retrieval
-
Ruiz-Perez, R.: Consequences of applying cataloguing codes for author entries to the Spanish National Library online catalogs (2001)
0.07
0.069550246 = product of:
0.13910049 = sum of:
0.028923139 = weight(_text_:retrieval in 5435) [ClassicSimilarity], result of:
0.028923139 = score(doc=5435,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23154683 = fieldWeight in 5435, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.03125 = fieldNorm(doc=5435)
0.01711173 = weight(_text_:use in 5435) [ClassicSimilarity], result of:
0.01711173 = score(doc=5435,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.13532647 = fieldWeight in 5435, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.03125 = fieldNorm(doc=5435)
0.023188837 = weight(_text_:of in 5435) [ClassicSimilarity], result of:
0.023188837 = score(doc=5435,freq=54.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3591007 = fieldWeight in 5435, product of:
7.3484693 = tf(freq=54.0), with freq of:
54.0 = termFreq=54.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03125 = fieldNorm(doc=5435)
0.0698768 = sum of:
0.012484977 = weight(_text_:on in 5435) [ClassicSimilarity], result of:
0.012484977 = score(doc=5435,freq=4.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.13746344 = fieldWeight in 5435, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.03125 = fieldNorm(doc=5435)
0.05739182 = weight(_text_:line in 5435) [ClassicSimilarity], result of:
0.05739182 = score(doc=5435,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.24783395 = fieldWeight in 5435, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.03125 = fieldNorm(doc=5435)
0.5 = coord(4/8)
- Abstract
- In this empirical study of a sample of catalog records I investigate the implications for information retrieval of the rules for choosing author access points in online catalogs. Aims: To obtain data that can be used to inform a revision of current cataloguing rules, and to propose more functional criteria aimed at improving the retrieval of information located on the basis of author names. Material and methods: A total of 838 records from the Biblioteca Nacional Española (Spanish National Library) were examined to analyze the use of authorities as access points. Authors were classified as creative or non-creative to facilitate the analysis. The variables investigated were author source location, potential author access points, actual entries used in the record, and loss of potential entry points. Results: A total of 3566 potential author access points were identified (mean of 4.25 per record). The title page yielded 57.3% of all potential access points, the table of contents yielded 33.5%, and other sources accounted for the remaining 9.1%. A total of 2125 potential authors were not used as access points in the records (overall loss of 59.5%). A total of 960 authors named on the title page were not used as entries (30.23% loss). In works with up to three authors per responsibility function, 24.8% of the authors were not used as entry points. In works with more than three authors, 75.2% of the potential access points were unused. Discussion and conclusions: A significant proportion of potential access points from the table of contents and the title page went unused. If the access points from these sources were used, author indexes would be more complete and accurate, and retrieval with online catalogs would be more efficient. I suggest that losses for creative authors were caused by neglect of the table of contents as a source of entries, strict application of the rule of three, and other specific factors. Losses for non-creative authors were caused by ambiguities and gaps in current cataloguing rules for choosing added author entries. The findings support the urgent need to revise cataloguing rules for author access points to make them more flexible, more practical, and more in line with actual responsibility functions and types of authorship.
-
Computational linguistics for the new millennium : divergence or synergy? Proceedings of the International Symposium held at the Ruprecht-Karls Universität Heidelberg, 21-22 July 2000. Festschrift in honour of Peter Hellwig on the occasion of his 60th birthday (2002)
0.07
0.06873793 = product of:
0.13747586 = sum of:
0.021389665 = weight(_text_:use in 4900) [ClassicSimilarity], result of:
0.021389665 = score(doc=4900,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 4900, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=4900)
0.019324033 = weight(_text_:of in 4900) [ClassicSimilarity], result of:
0.019324033 = score(doc=4900,freq=24.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.2992506 = fieldWeight in 4900, product of:
4.8989797 = tf(freq=24.0), with freq of:
24.0 = termFreq=24.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=4900)
0.082775034 = sum of:
0.0110352645 = weight(_text_:on in 4900) [ClassicSimilarity], result of:
0.0110352645 = score(doc=4900,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.121501654 = fieldWeight in 4900, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=4900)
0.07173977 = weight(_text_:line in 4900) [ClassicSimilarity], result of:
0.07173977 = score(doc=4900,freq=2.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
0.30979243 = fieldWeight in 4900, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0390625 = fieldNorm(doc=4900)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 4900) [ClassicSimilarity], result of:
0.02797425 = score(doc=4900,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 4900, 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=4900)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- The two seemingly conflicting tendencies, synergy and divergence, are both fundamental to the advancement of any science. Their interplay defines the demarcation line between application-oriented and theoretical research. The papers in this festschrift in honour of Peter Hellwig are geared to answer questions that arise from this insight: where does the discipline of Computational Linguistics currently stand, what has been achieved so far and what should be done next. Given the complexity of such questions, no simple answers can be expected. However, each of the practitioners and researchers are contributing from their very own perspective a piece of insight into the overall picture of today's and tomorrow's computational linguistics.
- Content
- Contents: Manfred Klenner / Henriette Visser: Introduction - Khurshid Ahmad: Writing Linguistics: When I use a word it means what I choose it to mean - Jürgen Handke: 2000 and Beyond: The Potential of New Technologies in Linguistics - Jurij Apresjan / Igor Boguslavsky / Leonid Iomdin / Leonid Tsinman: Lexical Functions in NU: Possible Uses - Hubert Lehmann: Practical Machine Translation and Linguistic Theory - Karin Haenelt: A Contextbased Approach towards Content Processing of Electronic Documents - Petr Sgall / Eva Hajicová: Are Linguistic Frameworks Comparable? - Wolfgang Menzel: Theory and Applications in Computational Linguistics - Is there Common Ground? - Robert Porzel / Michael Strube: Towards Context-adaptive Natural Language Processing Systems - Nicoletta Calzolari: Language Resources in a Multilingual Setting: The European Perspective - Piek Vossen: Computational Linguistics for Theory and Practice.
-
Losada, D.E.; Barreiro, A.: Emebedding term similarity and inverse document frequency into a logical model of information retrieval (2003)
0.07
0.067203455 = product of:
0.13440691 = sum of:
0.057846278 = weight(_text_:retrieval in 1422) [ClassicSimilarity], result of:
0.057846278 = score(doc=1422,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.46309367 = fieldWeight in 1422, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.03422346 = weight(_text_:use in 1422) [ClassicSimilarity], result of:
0.03422346 = score(doc=1422,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.019957775 = weight(_text_:of in 1422) [ClassicSimilarity], result of:
0.019957775 = score(doc=1422,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3090647 = fieldWeight in 1422, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.0223794 = product of:
0.0447588 = sum of:
0.0447588 = weight(_text_:22 in 1422) [ClassicSimilarity], result of:
0.0447588 = score(doc=1422,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.30952093 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- We propose a novel approach to incorporate term similarity and inverse document frequency into a logical model of information retrieval. The ability of the logic to handle expressive representations along with the use of such classical notions are promising characteristics for IR systems. The approach proposed here has been efficiently implemented and experiments against test collections are presented.
- Date
- 22. 3.2003 19:27:23
- Footnote
- Beitrag eines Themenheftes: Mathematical, logical, and formal methods in information retrieval
- Source
- Journal of the American Society for Information Science and technology. 54(2003) no.4, S.285-301
-
Komlodi, A.; Soergel, D.; Marchionini, G.: Search histories for user support in user interfaces (2006)
0.07
0.06624834 = product of:
0.105997354 = sum of:
0.025048172 = weight(_text_:retrieval in 5298) [ClassicSimilarity], result of:
0.025048172 = score(doc=5298,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.20052543 = fieldWeight in 5298, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=5298)
0.036299463 = weight(_text_:use in 5298) [ClassicSimilarity], result of:
0.036299463 = score(doc=5298,freq=4.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.2870708 = fieldWeight in 5298, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=5298)
0.016396983 = weight(_text_:of in 5298) [ClassicSimilarity], result of:
0.016396983 = score(doc=5298,freq=12.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.25392252 = fieldWeight in 5298, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=5298)
0.011468184 = product of:
0.022936368 = sum of:
0.022936368 = weight(_text_:on in 5298) [ClassicSimilarity], result of:
0.022936368 = score(doc=5298,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.25253648 = fieldWeight in 5298, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=5298)
0.5 = coord(1/2)
0.016784549 = product of:
0.033569098 = sum of:
0.033569098 = weight(_text_:22 in 5298) [ClassicSimilarity], result of:
0.033569098 = score(doc=5298,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.23214069 = fieldWeight in 5298, 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=5298)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- The authors describe user interface tools based on search histories to support legal information seekers. The design of the tools was informed by the results of a user study (Komlodi, 2002a) that examined the use of human memory, external memory aids, and search histories in legal information seeking and derived interface design recommendations for information storage and retrieval systems. The data collected were analyzed to identify potential task areas where search histories can support information seeking and use. The results show that many information-seeking tasks can take advantage of automatically and manually recorded history information. These findings encouraged the design of user interface tools building on search history information: direct search history displays, history-enabled scratchpad facilities, and organized results collection tools.
- Date
- 22. 7.2006 18:04:19
- Footnote
- Beitrag in einer Special Section "Perspectives on Search User Interfaces: Best Practices and Future Visions"
- Source
- Journal of the American Society for Information Science and Technology. 57(2006) no.6, S.803-897
-
MacFarlane, A.; Tuson, A.: Local search : a guide for the information retrieval practitioner (2009)
0.07
0.066164754 = product of:
0.13232951 = sum of:
0.04338471 = weight(_text_:retrieval in 2457) [ClassicSimilarity], result of:
0.04338471 = score(doc=2457,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.34732026 = fieldWeight in 2457, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=2457)
0.057394497 = weight(_text_:use in 2457) [ClassicSimilarity], result of:
0.057394497 = score(doc=2457,freq=10.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.45389885 = fieldWeight in 2457, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.046875 = fieldNorm(doc=2457)
0.02008212 = weight(_text_:of in 2457) [ClassicSimilarity], result of:
0.02008212 = score(doc=2457,freq=18.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3109903 = fieldWeight in 2457, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.046875 = fieldNorm(doc=2457)
0.011468184 = product of:
0.022936368 = sum of:
0.022936368 = weight(_text_:on in 2457) [ClassicSimilarity], result of:
0.022936368 = score(doc=2457,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.25253648 = fieldWeight in 2457, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.046875 = fieldNorm(doc=2457)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- There are a number of combinatorial optimisation problems in information retrieval in which the use of local search methods are worthwhile. The purpose of this paper is to show how local search can be used to solve some well known tasks in information retrieval (IR), how previous research in the field is piecemeal, bereft of a structure and methodologically flawed, and to suggest more rigorous ways of applying local search methods to solve IR problems. We provide a query based taxonomy for analysing the use of local search in IR tasks and an overview of issues such as fitness functions, statistical significance and test collections when conducting experiments on combinatorial optimisation problems. The paper gives a guide on the pitfalls and problems for IR practitioners who wish to use local search to solve their research issues, and gives practical advice on the use of such methods. The query based taxonomy is a novel structure which can be used by the IR practitioner in order to examine the use of local search in IR.
-
Hawking, D.; Robertson, S.: On collection size and retrieval effectiveness (2003)
0.07
0.06578156 = product of:
0.1754175 = sum of:
0.09446257 = weight(_text_:retrieval in 4109) [ClassicSimilarity], result of:
0.09446257 = score(doc=4109,freq=4.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.75622874 = fieldWeight in 4109, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.125 = fieldNorm(doc=4109)
0.017656423 = product of:
0.035312846 = sum of:
0.035312846 = weight(_text_:on in 4109) [ClassicSimilarity], result of:
0.035312846 = score(doc=4109,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.3888053 = fieldWeight in 4109, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.125 = fieldNorm(doc=4109)
0.5 = coord(1/2)
0.0632985 = product of:
0.126597 = sum of:
0.126597 = weight(_text_:22 in 4109) [ClassicSimilarity], result of:
0.126597 = score(doc=4109,freq=4.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.8754574 = fieldWeight in 4109, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=4109)
0.5 = coord(1/2)
0.375 = coord(3/8)
- Date
- 14. 8.2005 14:22:22
- Source
- Information retrieval. 6(2003) no.1, S.99-150
-
Sauperl, A.: Precoordination or not? : a new view of the old question (2009)
0.07
0.06572449 = product of:
0.105159186 = sum of:
0.036153924 = weight(_text_:retrieval in 3611) [ClassicSimilarity], result of:
0.036153924 = score(doc=3611,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.28943354 = fieldWeight in 3611, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=3611)
0.021389665 = weight(_text_:use in 3611) [ClassicSimilarity], result of:
0.021389665 = score(doc=3611,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 3611, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=3611)
0.02011309 = weight(_text_:of in 3611) [ClassicSimilarity], result of:
0.02011309 = score(doc=3611,freq=26.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.31146988 = fieldWeight in 3611, product of:
5.0990195 = tf(freq=26.0), with freq of:
26.0 = termFreq=26.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=3611)
0.013515383 = product of:
0.027030766 = sum of:
0.027030766 = weight(_text_:on in 3611) [ClassicSimilarity], result of:
0.027030766 = score(doc=3611,freq=12.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.29761705 = fieldWeight in 3611, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=3611)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 3611) [ClassicSimilarity], result of:
0.02797425 = score(doc=3611,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 3611, 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=3611)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Purpose - This paper aims to discuss some long-standing issues of the development of a subject heading language as pre- or postcoordinated. Design/methodology/approach - In a review of literature on pre- and postcoordination and user behaviour, 20 criteria originally discussed by Svenonius are considered. Findings - The advantages and disadvantages of pre- and postcoordinated systems are on a very similar level. Most subject heading languages developed recently are precoordinated. They all require investments in highly skilled intellectual work, and are therefore expensive and difficult to maintain. Postcoordinated systems seem to have more advantages for information providers, but less for users. However, most of these disadvantages could be overcome by known information retrieval models and techniques. Research limitations/implications - The criteria originally discussed by Svenonius are difficult to evaluate in an exact manner. Some of them are also irrelevant because of changes in information retrieval systems. Practical implications - It was found that the decision on whether to use a pre- or postcoordinated system cannot be taken independent of consideration of the subject authority file and the functions of an information retrieval system, which should support users on one hand and information providers and indexers on the other. Originality/value - This literature review brings together some findings that have not been considered together previously.
- Content
- Bezug zu: Svenonius, E.: Precoordination or not?. In: Subject indexing: principles and practices in the 90's. Proceedings of the IFLA Satellite Meeting Held in Lisbon, Portugal, 17-18 August 1993, and sponsored by the IFLA Section on Classification and Indexing and the Instituto da Biblioteca Nacional e do Livro, Lisbon, Portugal. Ed.: R.P. Holley et al. München: Saur 1995. S.231-255.
- Date
- 20. 6.2010 14:22:43
- Source
- Journal of documentation. 65(2009) no.5, S.817-833
-
Garcés, P.J.; Olivas, J.A.; Romero, F.P.: Concept-matching IR systems versus word-matching information retrieval systems : considering fuzzy interrelations for indexing Web pages (2006)
0.06
0.06464895 = product of:
0.10343832 = sum of:
0.036153924 = weight(_text_:retrieval in 5288) [ClassicSimilarity], result of:
0.036153924 = score(doc=5288,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.28943354 = fieldWeight in 5288, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=5288)
0.021389665 = weight(_text_:use in 5288) [ClassicSimilarity], result of:
0.021389665 = score(doc=5288,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 5288, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=5288)
0.02087234 = weight(_text_:of in 5288) [ClassicSimilarity], result of:
0.02087234 = score(doc=5288,freq=28.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.32322758 = fieldWeight in 5288, product of:
5.2915025 = tf(freq=28.0), with freq of:
28.0 = termFreq=28.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=5288)
0.0110352645 = product of:
0.022070529 = sum of:
0.022070529 = weight(_text_:on in 5288) [ClassicSimilarity], result of:
0.022070529 = score(doc=5288,freq=8.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.24300331 = fieldWeight in 5288, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=5288)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 5288) [ClassicSimilarity], result of:
0.02797425 = score(doc=5288,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 5288, 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=5288)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- This article presents a semantic-based Web retrieval system that is capable of retrieving the Web pages that are conceptually related to the implicit concepts of the query. The concept of concept is managed from a fuzzy point of view by means of semantic areas. In this context, the proposed system improves most search engines that are based on matching words. The key of the system is to use a new version of the Fuzzy Interrelations and Synonymy-Based Concept Representation Model (FIS-CRM) to extract and represent the concepts contained in both the Web pages and the user query. This model, which was integrated into other tools such as the Fuzzy Interrelations and Synonymy based Searcher (FISS) metasearcher and the fz-mail system, considers the fuzzy synonymy and the fuzzy generality interrelations as a means of representing word interrelations (stored in a fuzzy synonymy dictionary and ontologies). The new version of the model, which is based on the study of the cooccurrences of synonyms, integrates a soft method for disambiguating word senses. This method also considers the context of the word to be disambiguated and the thematic ontologies and sets of synonyms stored in the dictionary.
- Date
- 22. 7.2006 17:14:12
- Footnote
- Beitrag in einer Special Topic Section on Soft Approaches to Information Retrieval and Information Access on the Web
- Source
- Journal of the American Society for Information Science and Technology. 57(2006) no.4, S.564-576
-
Larkey, L.S.; Connell, M.E.: Structured queries, language modelling, and relevance modelling in cross-language information retrieval (2005)
0.06
0.06432374 = product of:
0.10291798 = sum of:
0.04174695 = weight(_text_:retrieval in 1022) [ClassicSimilarity], result of:
0.04174695 = score(doc=1022,freq=8.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.33420905 = fieldWeight in 1022, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=1022)
0.021389665 = weight(_text_:use in 1022) [ClassicSimilarity], result of:
0.021389665 = score(doc=1022,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.1691581 = fieldWeight in 1022, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=1022)
0.014758972 = weight(_text_:of in 1022) [ClassicSimilarity], result of:
0.014758972 = score(doc=1022,freq=14.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.22855641 = fieldWeight in 1022, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=1022)
0.0110352645 = product of:
0.022070529 = sum of:
0.022070529 = weight(_text_:on in 1022) [ClassicSimilarity], result of:
0.022070529 = score(doc=1022,freq=8.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.24300331 = fieldWeight in 1022, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=1022)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 1022) [ClassicSimilarity], result of:
0.02797425 = score(doc=1022,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 1022, 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=1022)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Two probabilistic approaches to cross-lingual retrieval are in wide use today, those based on probabilistic models of relevance, as exemplified by INQUERY, and those based on language modeling. INQUERY, as a query net model, allows the easy incorporation of query operators, including a synonym operator, which has proven to be extremely useful in cross-language information retrieval (CLIR), in an approach often called structured query translation. In contrast, language models incorporate translation probabilities into a unified framework. We compare the two approaches on Arabic and Spanish data sets, using two kinds of bilingual dictionaries--one derived from a conventional dictionary, and one derived from a parallel corpus. We find that structured query processing gives slightly better results when queries are not expanded. On the other hand, when queries are expanded, language modeling gives better results, but only when using a probabilistic dictionary derived from a parallel corpus. We pursue two additional issues inherent in the comparison of structured query processing with language modeling. The first concerns query expansion, and the second is the role of translation probabilities. We compare conventional expansion techniques (pseudo-relevance feedback) with relevance modeling, a new IR approach which fits into the formal framework of language modeling. We find that relevance modeling and pseudo-relevance feedback achieve comparable levels of retrieval and that good translation probabilities confer a small but significant advantage.
- Date
- 26.12.2007 20:22:11
-
Can, F.; Kocberber, S.; Balcik, E.; Kaynak, C.; Ocalan, H.C.: Information retrieval on Turkish texts (2008)
0.06
0.06410114 = product of:
0.12820227 = sum of:
0.06534432 = weight(_text_:retrieval in 1373) [ClassicSimilarity], result of:
0.06534432 = score(doc=1373,freq=10.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.5231199 = fieldWeight in 1373, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=1373)
0.029945528 = weight(_text_:use in 1373) [ClassicSimilarity], result of:
0.029945528 = score(doc=1373,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 1373, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=1373)
0.017463053 = weight(_text_:of in 1373) [ClassicSimilarity], result of:
0.017463053 = score(doc=1373,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.2704316 = fieldWeight in 1373, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=1373)
0.01544937 = product of:
0.03089874 = sum of:
0.03089874 = weight(_text_:on in 1373) [ClassicSimilarity], result of:
0.03089874 = score(doc=1373,freq=8.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.34020463 = fieldWeight in 1373, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=1373)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- In this study, we investigate information retrieval (IR) on Turkish texts using a large-scale test collection that contains 408,305 documents and 72 ad hoc queries. We examine the effects of several stemming options and query-document matching functions on retrieval performance. We show that a simple word truncation approach, a word truncation approach that uses language-dependent corpus statistics, and an elaborate lemmatizer-based stemmer provide similar retrieval effectiveness in Turkish IR. We investigate the effects of a range of search conditions on the retrieval performance; these include scalability issues, query and document length effects, and the use of stopword list in indexing.
- Source
- Journal of the American Society for Information Science and Technology. 59(2008) no.3, S.407-421
-
Cecchini, R.L.; Lorenzetti, C.M.; Maguitman, A.G.; Brignole, N.B.: Using genetic algorithms to evolve a population of topical queries (2008)
0.06
0.06376369 = product of:
0.10202191 = sum of:
0.020873476 = weight(_text_:retrieval in 2443) [ClassicSimilarity], result of:
0.020873476 = score(doc=2443,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.16710453 = fieldWeight in 2443, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=2443)
0.030249555 = weight(_text_:use in 2443) [ClassicSimilarity], result of:
0.030249555 = score(doc=2443,freq=4.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23922569 = fieldWeight in 2443, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0390625 = fieldNorm(doc=2443)
0.02231347 = weight(_text_:of in 2443) [ClassicSimilarity], result of:
0.02231347 = score(doc=2443,freq=32.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.34554482 = fieldWeight in 2443, product of:
5.656854 = tf(freq=32.0), with freq of:
32.0 = termFreq=32.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0390625 = fieldNorm(doc=2443)
0.014598285 = product of:
0.02919657 = sum of:
0.02919657 = weight(_text_:on in 2443) [ClassicSimilarity], result of:
0.02919657 = score(doc=2443,freq=14.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.3214632 = fieldWeight in 2443, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0390625 = fieldNorm(doc=2443)
0.5 = coord(1/2)
0.013987125 = product of:
0.02797425 = sum of:
0.02797425 = weight(_text_:22 in 2443) [ClassicSimilarity], result of:
0.02797425 = score(doc=2443,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.19345059 = fieldWeight in 2443, 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=2443)
0.5 = coord(1/2)
0.625 = coord(5/8)
- Abstract
- Systems for searching the Web based on thematic contexts can be built on top of a conventional search engine and benefit from the huge amount of content as well as from the functionality available through the search engine interface. The quality of the material collected by such systems is highly dependant on the vocabulary used to generate the search queries. In this scenario, selecting good query terms can be seen as an optimization problem where the objective function to be optimized is based on the effectiveness of a query to retrieve relevant material. Some characteristics of this optimization problem are: (1) the high-dimensionality of the search space, where candidate solutions are queries and each term corresponds to a different dimension, (2) the existence of acceptable suboptimal solutions, (3) the possibility of finding multiple solutions, and in many cases (4) the quest for novelty. This article describes optimization techniques based on Genetic Algorithms to evolve "good query terms" in the context of a given topic. The proposed techniques place emphasis on searching for novel material that is related to the search context. We discuss the use of a mutation pool to allow the generation of queries with new terms, study the effect of different mutation rates on the exploration of query-space, and discuss the use of a especially developed fitness function that favors the construction of queries containing novel but related terms.
- Date
- 22.11.2008 12:49:22
- Footnote
- Beitrag in einem Themenheft "Adaptive information retrieval"
