-
Ellis, D.; Wilson, T.; Allen, D.: Information science and information systems : conjunct subjects - disjunct disciplines (1999)
0.03
0.027877405 = product of:
0.05575481 = sum of:
0.05575481 = product of:
0.083632216 = sum of:
0.005919423 = weight(_text_:s in 4345) [ClassicSimilarity], result of:
0.005919423 = score(doc=4345,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.120123915 = fieldWeight in 4345, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=4345)
0.0777128 = weight(_text_:t in 4345) [ClassicSimilarity], result of:
0.0777128 = score(doc=4345,freq=2.0), product of:
0.17854862 = queryWeight, product of:
3.9394085 = idf(docFreq=2338, maxDocs=44218)
0.04532371 = queryNorm
0.43524727 = fieldWeight in 4345, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9394085 = idf(docFreq=2338, maxDocs=44218)
0.078125 = fieldNorm(doc=4345)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science. 50(1999) no.12, S.1095-1107
-
Ellis, D.: Progress and problems in information retrieval (1996)
0.02
0.019109365 = product of:
0.03821873 = sum of:
0.03821873 = product of:
0.057328094 = sum of:
0.008202194 = weight(_text_:s in 789) [ClassicSimilarity], result of:
0.008202194 = score(doc=789,freq=6.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.1664486 = fieldWeight in 789, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=789)
0.0491259 = weight(_text_:22 in 789) [ClassicSimilarity], result of:
0.0491259 = score(doc=789,freq=2.0), product of:
0.15871592 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04532371 = queryNorm
0.30952093 = fieldWeight in 789, 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=789)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 26. 7.2002 20:22:46
- Footnote
- Rez. in: Managing information 3(1996) no.10, S.49 (D. Bawden); Program 32(1998) no.2, S.190-192 (C. Revie)
- Pages
- 220 S
-
Spink, A.; Wilson, T.; Ellis, D.; Ford, N.: Modeling users' successive searches in digital environments : a National Science Foundation/British Library funded study (1998)
0.01
0.010043148 = product of:
0.020086296 = sum of:
0.020086296 = product of:
0.030129444 = sum of:
0.002929965 = weight(_text_:s in 1255) [ClassicSimilarity], result of:
0.002929965 = score(doc=1255,freq=4.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.059458308 = fieldWeight in 1255, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.02734375 = fieldNorm(doc=1255)
0.027199479 = weight(_text_:t in 1255) [ClassicSimilarity], result of:
0.027199479 = score(doc=1255,freq=2.0), product of:
0.17854862 = queryWeight, product of:
3.9394085 = idf(docFreq=2338, maxDocs=44218)
0.04532371 = queryNorm
0.15233654 = fieldWeight in 1255, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9394085 = idf(docFreq=2338, maxDocs=44218)
0.02734375 = fieldNorm(doc=1255)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- As digital libraries become a major source of information for many people, we need to know more about how people seek and retrieve information in digital environments. Quite commonly, users with a problem-at-hand and associated question-in-mind repeatedly search a literature for answers, and seek information in stages over extended periods from a variety of digital information resources. The process of repeatedly searching over time in relation to a specific, but possibly an evolving information problem (including changes or shifts in a variety of variables), is called the successive search phenomenon. The study outlined in this paper is currently investigating this new and little explored line of inquiry for information retrieval, Web searching, and digital libraries. The purpose of the research project is to investigate the nature, manifestations, and behavior of successive searching by users in digital environments, and to derive criteria for use in the design of information retrieval interfaces and systems supporting successive searching behavior. This study includes two related projects. The first project is based in the School of Library and Information Sciences at the University of North Texas and is funded by a National Science Foundation POWRE Grant <http://www.nsf.gov/cgi-bin/show?award=9753277>. The second project is based at the Department of Information Studies at the University of Sheffield (UK) and is funded by a grant from the British Library <http://www.shef. ac.uk/~is/research/imrg/uncerty.html> Research and Innovation Center. The broad objectives of each project are to examine the nature and extent of successive search episodes in digital environments by real users over time. The specific aim of the current project is twofold: * To characterize progressive changes and shifts that occur in: user situational context; user information problem; uncertainty reduction; user cognitive styles; cognitive and affective states of the user, and consequently in their queries; and * To characterize related changes over time in the type and use of information resources and search strategies particularly related to given capabilities of IR systems, and IR search engines, and examine changes in users' relevance judgments and criteria, and characterize their differences. The study is an observational, longitudinal data collection in the U.S. and U.K. Three questionnaires are used to collect data: reference, client post search and searcher post search questionnaires. Each successive search episode with a search intermediary for textual materials on the DIALOG Information Service is audiotaped and search transaction logs are recorded. Quantitative analysis includes statistical analysis using Likert scale data from the questionnaires and log-linear analysis of sequential data. Qualitative methods include: content analysis, structuring taxonomies; and diagrams to describe shifts and transitions within and between each search episode. Outcomes of the study are the development of appropriate model(s) for IR interactions in successive search episodes and the derivation of a set of design criteria for interfaces and systems supporting successive searching.
- Source
- D-Lib magazine. 4(1998) no.4, xx S
-
Ellis, D.: ¬The physical and cognitive paradigms in information retrieval research (1992)
0.00
0.0017648311 = product of:
0.0035296623 = sum of:
0.0035296623 = product of:
0.010588987 = sum of:
0.010588987 = weight(_text_:s in 8161) [ClassicSimilarity], result of:
0.010588987 = score(doc=8161,freq=10.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.2148842 = fieldWeight in 8161, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=8161)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Footnote
- Vgl. auch den Leserbrief von B.C. Vickery in J. doc. 48(1992) no.3, S.326-328 und die Antwort von D. Ellis in J. doc. 48(1992) no.3, S.328-331 sowie B. Frohmann in J. doc. 50(1994) no.3, S.239-240 und D. Ellis in J. doc. 50(1994) no.3, S.241-242
- Source
- Journal of documentation. 48(1992) no.1, S.45-64
-
Ellis, D.: ¬A behavioral approach to information system design (1989)
0.00
0.0015785128 = product of:
0.0031570257 = sum of:
0.0031570257 = product of:
0.009471077 = sum of:
0.009471077 = weight(_text_:s in 2706) [ClassicSimilarity], result of:
0.009471077 = score(doc=2706,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.19219826 = fieldWeight in 2706, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.125 = fieldNorm(doc=2706)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of documentation. 45(1989) no.3, S.171-212
-
Ellis, D.: ¬A behavioral model for information retrieval system design (1989)
0.00
0.0015785128 = product of:
0.0031570257 = sum of:
0.0031570257 = product of:
0.009471077 = sum of:
0.009471077 = weight(_text_:s in 2707) [ClassicSimilarity], result of:
0.009471077 = score(doc=2707,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.19219826 = fieldWeight in 2707, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.125 = fieldNorm(doc=2707)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of information science. 15(1989) no.4, S.237-247
-
Ellis, D.: Theory and explanation in information retrieval research (1984)
0.00
0.0015785128 = product of:
0.0031570257 = sum of:
0.0031570257 = product of:
0.009471077 = sum of:
0.009471077 = weight(_text_:s in 5337) [ClassicSimilarity], result of:
0.009471077 = score(doc=5337,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.19219826 = fieldWeight in 5337, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.125 = fieldNorm(doc=5337)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of information science. 8(1984), S.25-38
-
Ellis, D.: Paradigms in information retrieval research (1994)
0.00
0.0015785128 = product of:
0.0031570257 = sum of:
0.0031570257 = product of:
0.009471077 = sum of:
0.009471077 = weight(_text_:s in 1261) [ClassicSimilarity], result of:
0.009471077 = score(doc=1261,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.19219826 = fieldWeight in 1261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.125 = fieldNorm(doc=1261)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Pages
- S.275-291
-
Ellis, D.: New horizons in information retrieval (1990)
0.00
0.0013952213 = product of:
0.0027904427 = sum of:
0.0027904427 = product of:
0.008371328 = sum of:
0.008371328 = weight(_text_:s in 815) [ClassicSimilarity], result of:
0.008371328 = score(doc=815,freq=4.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.16988087 = fieldWeight in 815, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=815)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Footnote
- Rez. in: Canadian library journal. 48(1991) S.434 (E. Frick): "The book is full of information about the development of concepts and systems in this most fascinating part of professional work"
- Pages
- X,138 S
-
Ellis, D.; Oldman, H.: ¬The English literature researcher in the age of the Internet (2005)
0.00
0.0013811988 = product of:
0.0027623975 = sum of:
0.0027623975 = product of:
0.008287192 = sum of:
0.008287192 = weight(_text_:s in 4657) [ClassicSimilarity], result of:
0.008287192 = score(doc=4657,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.16817348 = fieldWeight in 4657, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.109375 = fieldNorm(doc=4657)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of information science. 31(2005) no.1, S.29-
-
Ellis, D.: Information retrieval research (1997)
0.00
0.0011838847 = product of:
0.0023677694 = sum of:
0.0023677694 = product of:
0.0071033076 = sum of:
0.0071033076 = weight(_text_:s in 1161) [ClassicSimilarity], result of:
0.0071033076 = score(doc=1161,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.14414869 = fieldWeight in 1161, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.09375 = fieldNorm(doc=1161)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Inform (London). 1997, no.200, S.3-4
-
Ellis, D.: Hypertext; origins and use (1991)
0.00
9.865705E-4 = product of:
0.001973141 = sum of:
0.001973141 = product of:
0.005919423 = sum of:
0.005919423 = weight(_text_:s in 4916) [ClassicSimilarity], result of:
0.005919423 = score(doc=4916,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.120123915 = fieldWeight in 4916, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=4916)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- International journal of information management. 11(1991) no.1, S.5-13
-
Ellis, D.: Is the manual creation of hypertext worth the effort? (1995)
0.00
9.865705E-4 = product of:
0.001973141 = sum of:
0.001973141 = product of:
0.005919423 = sum of:
0.005919423 = weight(_text_:s in 4888) [ClassicSimilarity], result of:
0.005919423 = score(doc=4888,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.120123915 = fieldWeight in 4888, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=4888)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- IATUL proceedings (new series). 4(1995) no.4, S.122-138
-
Ellis, D.; Ford, N.; Furner, J.: In search of the unknown user : indexing, hypertext and the World Wide Web (1998)
0.00
6.905994E-4 = product of:
0.0013811988 = sum of:
0.0013811988 = product of:
0.004143596 = sum of:
0.004143596 = weight(_text_:s in 4714) [ClassicSimilarity], result of:
0.004143596 = score(doc=4714,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.08408674 = fieldWeight in 4714, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0546875 = fieldNorm(doc=4714)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of documentation. 54(1998) no.1, S.28-47
-
Ellis, D.; Furner-Hines, J.; Willett, P.: Measuring the degree of similarity between objects in text retrieval systems (1993)
0.00
5.9194234E-4 = product of:
0.0011838847 = sum of:
0.0011838847 = product of:
0.0035516538 = sum of:
0.0035516538 = weight(_text_:s in 6716) [ClassicSimilarity], result of:
0.0035516538 = score(doc=6716,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.072074346 = fieldWeight in 6716, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=6716)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Perspectives in information management. 3(1993) no.2, S.128-149
-
Ellis, D.; Furner-Hines, J.; Willett, P.: Measuring the consistency of assignment of hypertext links in full-text documents (1994)
0.00
5.9194234E-4 = product of:
0.0011838847 = sum of:
0.0011838847 = product of:
0.0035516538 = sum of:
0.0035516538 = weight(_text_:s in 1052) [ClassicSimilarity], result of:
0.0035516538 = score(doc=1052,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.072074346 = fieldWeight in 1052, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=1052)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Pages
- S.67-80
-
Ellis, D.; Furner-Hines, J.; Willett, P.: ¬The creation of hypertext links in full-text documents (1994)
0.00
5.9194234E-4 = product of:
0.0011838847 = sum of:
0.0011838847 = product of:
0.0035516538 = sum of:
0.0035516538 = weight(_text_:s in 1084) [ClassicSimilarity], result of:
0.0035516538 = score(doc=1084,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.072074346 = fieldWeight in 1084, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=1084)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Pages
- 200 S
-
Ellis, D.; Vasconcelos, A.: ¬The relevance of facet analysis for World Wide Web subject organization and searching (2000)
0.00
5.9194234E-4 = product of:
0.0011838847 = sum of:
0.0011838847 = product of:
0.0035516538 = sum of:
0.0035516538 = weight(_text_:s in 2477) [ClassicSimilarity], result of:
0.0035516538 = score(doc=2477,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.072074346 = fieldWeight in 2477, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=2477)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of Internet cataloging. 2(2000) nos.3/4, S.97-114
-
Wilson, T.D.; Ford, N.; Ellis, D.; Foster, A.; Spink, A.: Information seeking and mediated searching : Part 2: uncertainty and Its correlates (2002)
0.00
5.9194234E-4 = product of:
0.0011838847 = sum of:
0.0011838847 = product of:
0.0035516538 = sum of:
0.0035516538 = weight(_text_:s in 5232) [ClassicSimilarity], result of:
0.0035516538 = score(doc=5232,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.072074346 = fieldWeight in 5232, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=5232)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 53(2002) no.9, S.704-715
-
Ellis, D.; Wilson, T.D.; Ford, N.; Foster, A.; Lam, H.M.; Burton, R.; Spink, A.: Information seeking and mediated searching : Part 5: user-intermediary interaction (2002)
0.00
5.9194234E-4 = product of:
0.0011838847 = sum of:
0.0011838847 = product of:
0.0035516538 = sum of:
0.0035516538 = weight(_text_:s in 5233) [ClassicSimilarity], result of:
0.0035516538 = score(doc=5233,freq=2.0), product of:
0.04927764 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04532371 = queryNorm
0.072074346 = fieldWeight in 5233, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.046875 = fieldNorm(doc=5233)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the American Society for Information Science and Technology. 53(2002) no.11, S.883-892
