-
Hlava, M.M.K.: Automatic indexing : comparing rule-based and statistics-based indexing systems (2005)
0.02
0.023295641 = product of:
0.046591282 = sum of:
0.046591282 = product of:
0.093182564 = sum of:
0.093182564 = weight(_text_:22 in 6265) [ClassicSimilarity], result of:
0.093182564 = score(doc=6265,freq=2.0), product of:
0.17203096 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04912602 = queryNorm
0.5416616 = fieldWeight in 6265, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6265)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information outlook. 9(2005) no.8, S.22-23
-
Pulgarin, A.; Gil-Leiva, I.: Bibliometric analysis of the automatic indexing literature : 1956-2000 (2004)
0.01
0.01395865 = product of:
0.0279173 = sum of:
0.0279173 = product of:
0.1116692 = sum of:
0.1116692 = weight(_text_:authors in 2566) [ClassicSimilarity], result of:
0.1116692 = score(doc=2566,freq=4.0), product of:
0.22395639 = queryWeight, product of:
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.04912602 = queryNorm
0.49862027 = fieldWeight in 2566, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.0546875 = fieldNorm(doc=2566)
0.25 = coord(1/4)
0.5 = coord(1/2)
- Abstract
- We present a bibliometric study of a corpus of 839 bibliographic references about automatic indexing, covering the period 1956-2000. We analyse the distribution of authors and works, the obsolescence and its dispersion, and the distribution of the literature by topic, year, and source type. We conclude that: (i) there has been a constant interest on the part of researchers; (ii) the most studied topics were the techniques and methods employed and the general aspects of automatic indexing; (iii) the productivity of the authors does fit a Lotka distribution (Dmax=0.02 and critical value=0.054); (iv) the annual aging factor is 95%; and (v) the dispersion of the literature is low.
-
Newman, D.J.; Block, S.: Probabilistic topic decomposition of an eighteenth-century American newspaper (2006)
0.01
0.0116478205 = product of:
0.023295641 = sum of:
0.023295641 = product of:
0.046591282 = sum of:
0.046591282 = weight(_text_:22 in 5291) [ClassicSimilarity], result of:
0.046591282 = score(doc=5291,freq=2.0), product of:
0.17203096 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04912602 = queryNorm
0.2708308 = fieldWeight in 5291, 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=5291)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 17:32:00