-
Brakel, P.A. van: CD-ROM encyclopedias (1991)
0.04
0.039110728 = product of:
0.117332175 = sum of:
0.117332175 = product of:
0.23466435 = sum of:
0.23466435 = weight(_text_:van in 1292) [ClassicSimilarity], result of:
0.23466435 = score(doc=1292,freq=2.0), product of:
0.23804191 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04268593 = queryNorm
0.98581105 = fieldWeight in 1292, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.125 = fieldNorm(doc=1292)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Brakel, P.A. van: Twenty years of training in online searching : integrating the Internet with the teaching programme (1996)
0.03
0.029333044 = product of:
0.08799913 = sum of:
0.08799913 = product of:
0.17599826 = sum of:
0.17599826 = weight(_text_:van in 7018) [ClassicSimilarity], result of:
0.17599826 = score(doc=7018,freq=2.0), product of:
0.23804191 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04268593 = queryNorm
0.7393583 = fieldWeight in 7018, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.09375 = fieldNorm(doc=7018)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Van der Walt, H.E.A.; Brakel, P.A. van: Method for the evaluation of the retrieval effectiveness of a CD-ROM bibliographic database (1991)
0.02
0.024198525 = product of:
0.072595574 = sum of:
0.072595574 = product of:
0.14519115 = sum of:
0.14519115 = weight(_text_:van in 3114) [ClassicSimilarity], result of:
0.14519115 = score(doc=3114,freq=4.0), product of:
0.23804191 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04268593 = queryNorm
0.60993946 = fieldWeight in 3114, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0546875 = fieldNorm(doc=3114)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Geyser, E.P.; Brakel, P.A. van: Man-machine interaction as a factor in the design of computerised information retrieval systems (1991)
0.01
0.012222102 = product of:
0.036666304 = sum of:
0.036666304 = product of:
0.07333261 = sum of:
0.07333261 = weight(_text_:van in 3843) [ClassicSimilarity], result of:
0.07333261 = score(doc=3843,freq=2.0), product of:
0.23804191 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04268593 = queryNorm
0.30806595 = fieldWeight in 3843, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0390625 = fieldNorm(doc=3843)
0.5 = coord(1/2)
0.33333334 = coord(1/3)