-
Walker, S.: Improving subject access painlessly : recent work on the Okapi online catalogue projects (1988)
0.06
0.05533268 = product of:
0.11066536 = sum of:
0.11066536 = sum of:
0.0108246 = weight(_text_:a in 7403) [ClassicSimilarity], result of:
0.0108246 = score(doc=7403,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 7403, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=7403)
0.09984076 = weight(_text_:22 in 7403) [ClassicSimilarity], result of:
0.09984076 = score(doc=7403,freq=2.0), product of:
0.16128273 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046056706 = queryNorm
0.61904186 = fieldWeight in 7403, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=7403)
0.5 = coord(1/2)
- Source
- Program. 22(1988), S.21-31
- Type
- a
-
Walker, S.: ¬The Okapi online catalogue research projects (1989)
0.03
0.034582928 = product of:
0.069165856 = sum of:
0.069165856 = sum of:
0.006765375 = weight(_text_:a in 1942) [ClassicSimilarity], result of:
0.006765375 = score(doc=1942,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.12739488 = fieldWeight in 1942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.078125 = fieldNorm(doc=1942)
0.06240048 = weight(_text_:22 in 1942) [ClassicSimilarity], result of:
0.06240048 = score(doc=1942,freq=2.0), product of:
0.16128273 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046056706 = queryNorm
0.38690117 = fieldWeight in 1942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=1942)
0.5 = coord(1/2)
- Date
- 16. 8.1998 11:22:08
- Type
- a
-
Walker, S.: Ease of use in online catalogues : a plea for the user (1986)
0.00
0.003827074 = product of:
0.007654148 = sum of:
0.007654148 = product of:
0.015308296 = sum of:
0.015308296 = weight(_text_:a in 375) [ClassicSimilarity], result of:
0.015308296 = score(doc=375,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.28826174 = fieldWeight in 375, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=375)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Mitev, N.N.; Walker, S.: Information retrieval aids in an online public access catalogue : automatic intelligent search sequencing (1985)
0.00
0.0028703054 = product of:
0.005740611 = sum of:
0.005740611 = product of:
0.011481222 = sum of:
0.011481222 = weight(_text_:a in 337) [ClassicSimilarity], result of:
0.011481222 = score(doc=337,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.2161963 = fieldWeight in 337, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=337)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Advances in intelligent retrieval: Proc. of a Conf. ... Wadham College, Oxford, 16.-17.4.1985. Intr.: M. Rowbottom
- Type
- a
-
Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 1 (2000)
0.00
0.0028703054 = product of:
0.005740611 = sum of:
0.005740611 = product of:
0.011481222 = sum of:
0.011481222 = weight(_text_:a in 4181) [ClassicSimilarity], result of:
0.011481222 = score(doc=4181,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.2161963 = fieldWeight in 4181, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=4181)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 2 (2000)
0.00
0.0028703054 = product of:
0.005740611 = sum of:
0.005740611 = product of:
0.011481222 = sum of:
0.011481222 = weight(_text_:a in 4286) [ClassicSimilarity], result of:
0.011481222 = score(doc=4286,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.2161963 = fieldWeight in 4286, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=4286)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Robertson, S.E.; Walker, S.; Beaulieu, M.: Experimentation as a way of life : Okapi at TREC (2000)
0.00
0.0028703054 = product of:
0.005740611 = sum of:
0.005740611 = product of:
0.011481222 = sum of:
0.011481222 = weight(_text_:a in 6030) [ClassicSimilarity], result of:
0.011481222 = score(doc=6030,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.2161963 = fieldWeight in 6030, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=6030)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Robertson, S.E.; Walker, S.; Beaulieu, M.M.; Gatford, M.; Payne, A.: Okapi at TREC-4 (1996)
0.00
0.0028703054 = product of:
0.005740611 = sum of:
0.005740611 = product of:
0.011481222 = sum of:
0.011481222 = weight(_text_:a in 7546) [ClassicSimilarity], result of:
0.011481222 = score(doc=7546,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.2161963 = fieldWeight in 7546, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=7546)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Walker, S.: Okapi : Evaluating and enhancing an experimental online catalog (1987)
0.00
0.00270615 = product of:
0.0054123 = sum of:
0.0054123 = product of:
0.0108246 = sum of:
0.0108246 = weight(_text_:a in 373) [ClassicSimilarity], result of:
0.0108246 = score(doc=373,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 373, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=373)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Walker, S.: ¬The free language approach to online catalogues (1985)
0.00
0.00270615 = product of:
0.0054123 = sum of:
0.0054123 = product of:
0.0108246 = sum of:
0.0108246 = weight(_text_:a in 383) [ClassicSimilarity], result of:
0.0108246 = score(doc=383,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 383, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=383)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Walker, S.: OCLC WorldCat collection sets (1998)
0.00
0.00270615 = product of:
0.0054123 = sum of:
0.0054123 = product of:
0.0108246 = sum of:
0.0108246 = weight(_text_:a in 5891) [ClassicSimilarity], result of:
0.0108246 = score(doc=5891,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 5891, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=5891)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Mitev, N.N.; Venner, G.M.; Walker, S.: Designing an online public access catalogue : OKAPI, a catalogue on a local area network (1985)
0.00
0.0023919214 = product of:
0.0047838427 = sum of:
0.0047838427 = product of:
0.009567685 = sum of:
0.009567685 = weight(_text_:a in 435) [ClassicSimilarity], result of:
0.009567685 = score(doc=435,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.18016359 = fieldWeight in 435, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.078125 = fieldNorm(doc=435)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Robertson, S.; Walker, S.: Threshold setting in adaptive filtering (2000)
0.00
0.0023678814 = product of:
0.0047357627 = sum of:
0.0047357627 = product of:
0.009471525 = sum of:
0.009471525 = weight(_text_:a in 2835) [ClassicSimilarity], result of:
0.009471525 = score(doc=2835,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.17835285 = fieldWeight in 2835, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.109375 = fieldNorm(doc=2835)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Robertson, S.E.; Walker, S.; Beaulieu, M.: Laboratory experiments with Okapi : participation in the TREC programme (1997)
0.00
0.0023678814 = product of:
0.0047357627 = sum of:
0.0047357627 = product of:
0.009471525 = sum of:
0.009471525 = weight(_text_:a in 2216) [ClassicSimilarity], result of:
0.009471525 = score(doc=2216,freq=8.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.17835285 = fieldWeight in 2216, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=2216)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Briefly reviews the history of laboratory testing of information retrieval systems, focusing on the idea of a general purpose test collection of documents, queries and relevance judgements. Gives an overview of the methods used in TREC (Text Retrieval Conference) which is concerned with an ideal test collection, and discusses the Okapi team's participation in TREC. Also discusses some of the issues surrounding the difficult problem of interactive evaluation in TREC. The reconciliation of the requirements of the laboratory context with the concerns of interactive retrieval has a long way to go
- Footnote
- Contribution to a thematic issue on Okapi and information retrieval research
- Type
- a
-
Walker, S.: Views on classification as a search tool on a computer (1991)
0.00
0.0020506454 = product of:
0.004101291 = sum of:
0.004101291 = product of:
0.008202582 = sum of:
0.008202582 = weight(_text_:a in 4837) [ClassicSimilarity], result of:
0.008202582 = score(doc=4837,freq=6.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.1544581 = fieldWeight in 4837, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=4837)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.00
0.0020506454 = product of:
0.004101291 = sum of:
0.004101291 = product of:
0.008202582 = sum of:
0.008202582 = weight(_text_:a in 2731) [ClassicSimilarity], result of:
0.008202582 = score(doc=2731,freq=6.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.1544581 = fieldWeight in 2731, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=2731)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- An automatic query expansion (AQE) facility in anonline catalogue was evaluated in an operational library setting. The OKAPI experimental system had other features including: ranked output 'best match' keyword searching, automatic stemming, spelling normalisation and cross referencing as well as relevance feedback. A combination of transaction log analysis, search replays, questionnaires and interviews was used for data collection. Findings show that contrary to previous results, AQE was beneficial in a substantial number of searches. Use intentions, the effectiveness of the 'best match' search and user interaction were identified as the main factors affecting the take-up of the query expansion facility
- Type
- a
-
Beaulieu, M.M.; Gatford, M.; Huang, X.; Robertson, S.E.; Walker, S.; Williams, P.: Okapi an TREC-5 (1997)
0.00
0.0020296127 = product of:
0.0040592253 = sum of:
0.0040592253 = product of:
0.008118451 = sum of:
0.008118451 = weight(_text_:a in 3097) [ClassicSimilarity], result of:
0.008118451 = score(doc=3097,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.15287387 = fieldWeight in 3097, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=3097)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Ogden, J.; Summers, E.; Walker, S.: Know(ing) Infrastructure : the wayback machine as object and instrument of digital research (2023)
0.00
0.0018909799 = product of:
0.0037819599 = sum of:
0.0037819599 = product of:
0.0075639198 = sum of:
0.0075639198 = weight(_text_:a in 1084) [ClassicSimilarity], result of:
0.0075639198 = score(doc=1084,freq=10.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.14243183 = fieldWeight in 1084, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0390625 = fieldNorm(doc=1084)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- From documenting human rights abuses to studying online advertising, web archives are increasingly positioned as critical resources for a broad range of scholarly Internet research agendas. In this article, we reflect on the motivations and methodological challenges of investigating the world's largest web archive, the Internet Archive's Wayback Machine (IAWM). Using a mixed methods approach, we report on a pilot project centred around documenting the inner workings of 'Save Page Now' (SPN) - an Internet Archive tool that allows users to initiate the creation and storage of 'snapshots' of web resources. By improving our understanding of SPN and its role in shaping the IAWM, this work examines how the public tool is being used to 'save the Web' and highlights the challenges of operationalising a study of the dynamic sociotechnical processes supporting this knowledge infrastructure. Inspired by existing Science and Technology Studies (STS) approaches, the paper charts our development of methodological interventions to support an interdisciplinary investigation of SPN, including: ethnographic methods, 'experimental blackbox tactics', data tracing, modelling and documentary research. We discuss the opportunities and limitations of our methodology when interfacing with issues associated with temporality, scale and visibility, as well as critically engage with our own positionality in the research process (in terms of expertise and access). We conclude with reflections on the implications of digital STS approaches for 'knowing infrastructure', where the use of these infrastructures is unavoidably intertwined with our ability to study the situated and material arrangements of their creation.
- Type
- a
-
Robertson, S.E.; Walker, S.: Some simple effective approximations to the 2-Poisson molde for probabilisitc weighted retrieval (1979)
0.00
0.0016913437 = product of:
0.0033826875 = sum of:
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = weight(_text_:a in 1940) [ClassicSimilarity], result of:
0.006765375 = score(doc=1940,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.12739488 = fieldWeight in 1940, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.078125 = fieldNorm(doc=1940)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Jones, S.; Gatford, M.; Robertson, S.; Hancock-Beaulieu, M.; Secker, J.; Walker, S.: Interactive thesaurus navigation : intelligence rules OK? (1995)
0.00
0.001674345 = product of:
0.00334869 = sum of:
0.00334869 = product of:
0.00669738 = sum of:
0.00669738 = weight(_text_:a in 180) [ClassicSimilarity], result of:
0.00669738 = score(doc=180,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.12611452 = fieldWeight in 180, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0546875 = fieldNorm(doc=180)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- We discuss whether it is feasible to build intelligent rule- or weight-based algorithms into general-purpose software for interactive thesaurus navigation. We survey some approaches to the problem reported in the literature, particularly those involving the assignement of 'link weights' in a thesaurus network, and point out some problems of both principle and practice. We then describe investigations which entailed logging the behavior of thesaurus users and testing the effect of thesaurus-based query enhancement in an IR system using term weighting, in an attempt to identify successful strategies to incorporate into automatic procedures. The results cause us to question many of the assumptions made by previous researchers in this area
- Type
- a
