Tenopir, C.; Neufang, R.: Electronic reference options : how they stack up in research libraries (1992)
0.20
0.19870684 = product of:
0.39741367 = sum of:
0.029945528 = weight(_text_:use in 2343) [ClassicSimilarity], result of:
0.029945528 = score(doc=2343,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.23682132 = fieldWeight in 2343, 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=2343)
0.017463053 = weight(_text_:of in 2343) [ClassicSimilarity], result of:
0.017463053 = score(doc=2343,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.2704316 = fieldWeight in 2343, 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=2343)
0.33042312 = sum of:
0.04634811 = weight(_text_:on in 2343) [ClassicSimilarity], result of:
0.04634811 = score(doc=2343,freq=18.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.51030695 = fieldWeight in 2343, product of:
4.2426405 = tf(freq=18.0), with freq of:
18.0 = termFreq=18.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=2343)
0.28407502 = weight(_text_:line in 2343) [ClassicSimilarity], result of:
0.28407502 = score(doc=2343,freq=16.0), product of:
0.23157367 = queryWeight, product of:
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.041294612 = queryNorm
1.2267156 = fieldWeight in 2343, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
5.6078424 = idf(docFreq=440, maxDocs=44218)
0.0546875 = fieldNorm(doc=2343)
0.019581974 = product of:
0.039163947 = sum of:
0.039163947 = weight(_text_:22 in 2343) [ClassicSimilarity], result of:
0.039163947 = score(doc=2343,freq=2.0), product of:
0.1446067 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.041294612 = queryNorm
0.2708308 = fieldWeight in 2343, 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=2343)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Report of a survey 96 (out of 119) US and Canadian member libraries of the Association of Research Libraries (ARL) to determine their use of on-line and CD-ROM data bases, including OPACs. 4 catalogues were identified: on-line mediated searching (97%); CD-ROMs (96%); end-user on-line searching (45%); and locally mounted magnetic tapes (37,5%). The latter option is expected to be the most widely used option in the new future. Although CD-ROM caused some migration from on-line, most migration was from printed sources to CD-ROM. Tables show: on-line hosts most used for intermediary on-line searching; on-line data bases most after searched by intermediaries; end user on-line systems offered by most libraries; the 20 most popular CD-ROM data bases; and the 8 magnetic tape data bases accessible on OPACs
- Source
- Online. 16(1992) no.2, S.22-28
Tenopir, C.; Neufang, R.: ¬The impact of electronic reference on reference librarians (1992)
0.01
0.0088768 = product of:
0.0355072 = sum of:
0.017850775 = weight(_text_:of in 6371) [ClassicSimilarity], result of:
0.017850775 = score(doc=6371,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27643585 = fieldWeight in 6371, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.125 = fieldNorm(doc=6371)
0.017656423 = product of:
0.035312846 = sum of:
0.035312846 = weight(_text_:on in 6371) [ClassicSimilarity], result of:
0.035312846 = score(doc=6371,freq=2.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.3888053 = fieldWeight in 6371, 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=6371)
0.5 = coord(1/2)
0.25 = coord(2/8)
