Search (2 results, page 1 of 1)
-
×
author_ss:"Lancaster, F.W."
- Did you mean:
- author's%3a%20in%2c T.%22 2
- authors%3a%20in%2c T.%22 5
-
Lancaster, F.W.: Searching databases on CD-ROM : comparison of the results of end-user searching with results from two modes of searching by skilled intermediaries (1994)
0.02
0.023342196 = product of: 0.04668439 = sum of: 0.04668439 = product of: 0.09336878 = sum of: 0.09336878 = weight(_text_:t in 8372) [ClassicSimilarity], result of: 0.09336878 = score(doc=8372,freq=8.0), product of: 0.17876579 = queryWeight, product of: 3.9394085 = idf(docFreq=2338, maxDocs=44218) 0.04537884 = queryNorm 0.5222967 = fieldWeight in 8372, product of: 2.828427 = tf(freq=8.0), with freq of: 8.0 = termFreq=8.0 3.9394085 = idf(docFreq=2338, maxDocs=44218) 0.046875 = fieldNorm(doc=8372) 0.5 = coord(1/2) 0.5 = coord(1/2)
- Content
- Im einzelnen wurden für den Patron (P), den Education Librarian (E) und das Team (T) folgende Zahlen ermittelt: Recall (P:32,3%; E:45,9%; T:53,8%); Precision (P:75,5%; E:71,4%; T:66,8%); Novelty (P:51,8%; E:61,6%; T:59,4%)
-
Lancaster, F.W.: Vocabulary control for information retrieval (1986)
0.01
0.012296414 = product of: 0.024592828 = sum of: 0.024592828 = product of: 0.049185656 = sum of: 0.049185656 = weight(_text_:22 in 217) [ClassicSimilarity], result of: 0.049185656 = score(doc=217,freq=2.0), product of: 0.15890898 = queryWeight, product of: 3.5018296 = idf(docFreq=3622, maxDocs=44218) 0.04537884 = queryNorm 0.30952093 = fieldWeight in 217, 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=217) 0.5 = coord(1/2) 0.5 = coord(1/2)
- Date
- 22. 4.2007 10:07:51