-
Järvelin, K.; Kristensen, J.; Niemi, T.; Sormunen, E.; Keskustalo, H.: ¬A deductive data model for query expansion (1996)
0.03
0.034743696 = product of:
0.06948739 = sum of:
0.06948739 = sum of:
0.032414593 = weight(_text_:u in 2230) [ClassicSimilarity], result of:
0.032414593 = score(doc=2230,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.21706703 = fieldWeight in 2230, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.046875 = fieldNorm(doc=2230)
0.037072796 = weight(_text_:22 in 2230) [ClassicSimilarity], result of:
0.037072796 = score(doc=2230,freq=2.0), product of:
0.1596997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045604642 = queryNorm
0.23214069 = fieldWeight in 2230, 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=2230)
0.5 = coord(1/2)
- Source
- Proceedings of the 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (ACM SIGIR '96), Zürich, Switzerland, August 18-22, 1996. Eds.: H.P. Frei et al
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Järvelin, K.: Evaluation (2011)
0.02
0.018908512 = product of:
0.037817024 = sum of:
0.037817024 = product of:
0.07563405 = sum of:
0.07563405 = weight(_text_:u in 548) [ClassicSimilarity], result of:
0.07563405 = score(doc=548,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.50648975 = fieldWeight in 548, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.109375 = fieldNorm(doc=548)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Interactive information seeking, behaviour and retrieval. Eds.: Ruthven, I. u. D. Kelly
-
Saastamoinen, M.; Järvelin, K.: Search task features in work tasks of varying types and complexity (2017)
0.01
0.009268199 = product of:
0.018536398 = sum of:
0.018536398 = product of:
0.037072796 = sum of:
0.037072796 = weight(_text_:22 in 3589) [ClassicSimilarity], result of:
0.037072796 = score(doc=3589,freq=2.0), product of:
0.1596997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045604642 = queryNorm
0.23214069 = fieldWeight in 3589, 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=3589)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Information searching in practice seldom is an end in itself. In work, work task (WT) performance forms the context, which information searching should serve. Therefore, information retrieval (IR) systems development/evaluation should take the WT context into account. The present paper analyzes how WT features: task complexity and task types, affect information searching in authentic work: the types of information needs, search processes, and search media. We collected data on 22 information professionals in authentic work situations in three organization types: city administration, universities, and companies. The data comprise 286 WTs and 420 search tasks (STs). The data include transaction logs, video recordings, daily questionnaires, interviews. and observation. The data were analyzed quantitatively. Even if the participants used a range of search media, most STs were simple throughout the data, and up to 42% of WTs did not include searching. WT's effects on STs are not straightforward: different WT types react differently to WT complexity. Due to the simplicity of authentic searching, the WT/ST types in interactive IR experiments should be reconsidered.
-
Järvelin, K.; Niemi, T.: Deductive information retrieval based on classifications (1993)
0.01
0.008103648 = product of:
0.016207296 = sum of:
0.016207296 = product of:
0.032414593 = sum of:
0.032414593 = weight(_text_:u in 2229) [ClassicSimilarity], result of:
0.032414593 = score(doc=2229,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.21706703 = fieldWeight in 2229, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.046875 = fieldNorm(doc=2229)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Näppilä, T.; Järvelin, K.; Niemi, T.: ¬A tool for data cube construction from structurally heterogeneous XML documents (2008)
0.01
0.0077234996 = product of:
0.015446999 = sum of:
0.015446999 = product of:
0.030893998 = sum of:
0.030893998 = weight(_text_:22 in 1369) [ClassicSimilarity], result of:
0.030893998 = score(doc=1369,freq=2.0), product of:
0.1596997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045604642 = queryNorm
0.19345059 = fieldWeight in 1369, 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=1369)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 9. 2.2008 17:22:42
-
Vakkari, P.; Järvelin, K.; Chang, Y.-W.: ¬The association of disciplinary background with the evolution of topics and methods in Library and Information Science research 1995-2015 (2023)
0.01
0.0077234996 = product of:
0.015446999 = sum of:
0.015446999 = product of:
0.030893998 = sum of:
0.030893998 = weight(_text_:22 in 998) [ClassicSimilarity], result of:
0.030893998 = score(doc=998,freq=2.0), product of:
0.1596997 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045604642 = queryNorm
0.19345059 = fieldWeight in 998, 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=998)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2023 18:15:06
-
Lehtokangas, R.; Järvelin, K.: Consistency of textual expression in newspaper articles : an argument for semantically based query expansion (2001)
0.01
0.0067530405 = product of:
0.013506081 = sum of:
0.013506081 = product of:
0.027012162 = sum of:
0.027012162 = weight(_text_:u in 4485) [ClassicSimilarity], result of:
0.027012162 = score(doc=4485,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.1808892 = fieldWeight in 4485, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.0390625 = fieldNorm(doc=4485)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Ingwersen, P.; Järvelin, K.: ¬The turn : integration of information seeking and retrieval in context (2005)
0.00
0.0033765202 = product of:
0.0067530405 = sum of:
0.0067530405 = product of:
0.013506081 = sum of:
0.013506081 = weight(_text_:u in 1323) [ClassicSimilarity], result of:
0.013506081 = score(doc=1323,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.0904446 = fieldWeight in 1323, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.01953125 = fieldNorm(doc=1323)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
