-
Pulgarin, A.; Gil-Leiva, I.: Bibliometric analysis of the automatic indexing literature : 1956-2000 (2004)
0.02
0.017675493 = product of:
0.035350986 = sum of:
0.035350986 = product of:
0.07070197 = sum of:
0.07070197 = weight(_text_:i in 2566) [ClassicSimilarity], result of:
0.07070197 = score(doc=2566,freq=4.0), product of:
0.17138503 = queryWeight, product of:
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.045439374 = queryNorm
0.41253293 = fieldWeight in 2566, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.0546875 = fieldNorm(doc=2566)
0.5 = coord(1/2)
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.
-
Souza, R.R.; Gil-Leiva, I.: Automatic indexing of scientific texts : a methodological comparison (2016)
0.01
0.014283955 = product of:
0.02856791 = sum of:
0.02856791 = product of:
0.05713582 = sum of:
0.05713582 = weight(_text_:i in 4913) [ClassicSimilarity], result of:
0.05713582 = score(doc=4913,freq=2.0), product of:
0.17138503 = queryWeight, product of:
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.045439374 = queryNorm
0.33337694 = fieldWeight in 4913, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.0625 = fieldNorm(doc=4913)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Gil-Leiva, I.: SISA-automatic indexing system for scientific articles : experiments with location heuristics rules versus TF-IDF rules (2017)
0.01
0.010712966 = product of:
0.021425933 = sum of:
0.021425933 = product of:
0.042851865 = sum of:
0.042851865 = weight(_text_:i in 3622) [ClassicSimilarity], result of:
0.042851865 = score(doc=3622,freq=2.0), product of:
0.17138503 = queryWeight, product of:
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.045439374 = queryNorm
0.25003272 = fieldWeight in 3622, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.7717297 = idf(docFreq=2765, maxDocs=44218)
0.046875 = fieldNorm(doc=3622)
0.5 = coord(1/2)
0.5 = coord(1/2)