-
Brookes, B.C.: Theory of the Bradford law (1977)
0.00
0.003155601 = product of:
0.025244808 = sum of:
0.025244808 = weight(_text_:of in 2825) [ClassicSimilarity], result of:
0.025244808 = score(doc=2825,freq=4.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.39093933 = fieldWeight in 2825, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.125 = fieldNorm(doc=2825)
0.125 = coord(1/8)
- Source
- Journal of documentation. 33(1977), S.180-209
-
Solla Price, D. de: Theory of bibliometric and other cumulative advantage processes (1976)
0.00
0.003155601 = product of:
0.025244808 = sum of:
0.025244808 = weight(_text_:of in 2830) [ClassicSimilarity], result of:
0.025244808 = score(doc=2830,freq=4.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.39093933 = fieldWeight in 2830, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.125 = fieldNorm(doc=2830)
0.125 = coord(1/8)
- Source
- Journal of the American Society for Information Science. 27(1976), S.292-306
-
Bookstein, A.: ¬The bibliometric distributions (1976)
0.00
0.0027328306 = product of:
0.021862645 = sum of:
0.021862645 = weight(_text_:of in 5061) [ClassicSimilarity], result of:
0.021862645 = score(doc=5061,freq=12.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.33856338 = fieldWeight in 5061, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=5061)
0.125 = coord(1/8)
- Abstract
- One of the most surprising findings in the information sciences is the recurrence of a small number of frequency distributions. In this paper, these distributions are described, and a point of view is adopted that allows us to understand them a being different versions of a single distribution. The empirical distributions are shown to be special cases of a single theoretic distribution. It is found that when random fluctuations are introduced, the distributions are not strongly influenced
-
Rao, I.K.: ¬The distribution of scientific productivity and social change (1978)
0.00
0.002494722 = product of:
0.019957775 = sum of:
0.019957775 = weight(_text_:of in 8) [ClassicSimilarity], result of:
0.019957775 = score(doc=8,freq=10.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.3090647 = fieldWeight in 8, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=8)
0.125 = coord(1/8)
- Abstract
- Results in the literature concerning the probability that an author publishes r articles in time t are reexamined, and it is found that a negative binomial distribution bits scientific productivity data (by the chi-squared goodness-of-fit-test) better than many other distribution such as geometric, logarithmic, zeta, cumulative advantage, etc. It is shown analytically that the nagative binomial distribution describes a pattern of scientific productivity under the 'success-breeds-success' condition in a wide variety of social circumstances
- Source
- Journal of the American Society for Information Science. 29(1978), S.111-122
-
Mulkay, M.J.: ¬The model of branching (1976)
0.00
0.002231347 = product of:
0.017850775 = sum of:
0.017850775 = weight(_text_:of in 995) [ClassicSimilarity], result of:
0.017850775 = score(doc=995,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27643585 = fieldWeight in 995, 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=995)
0.125 = coord(1/8)
-
Narin, F.; Moll, J.K.: Bibliometrics (1977)
0.00
0.002231347 = product of:
0.017850775 = sum of:
0.017850775 = weight(_text_:of in 1085) [ClassicSimilarity], result of:
0.017850775 = score(doc=1085,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27643585 = fieldWeight in 1085, 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=1085)
0.125 = coord(1/8)
- Source
- Annual review of information science and technology. 12(1977), S.35-58
-
Aiyepekn, W.O.: ¬The Bradford distribution theory (1977)
0.00
0.002231347 = product of:
0.017850775 = sum of:
0.017850775 = weight(_text_:of in 1322) [ClassicSimilarity], result of:
0.017850775 = score(doc=1322,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27643585 = fieldWeight in 1322, 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=1322)
0.125 = coord(1/8)
- Source
- Journal of documentation. 33(1977), S.210-219
-
Murphy, L.J.: Lotka's law in the humanities? (1973)
0.00
0.002231347 = product of:
0.017850775 = sum of:
0.017850775 = weight(_text_:of in 5508) [ClassicSimilarity], result of:
0.017850775 = score(doc=5508,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.27643585 = fieldWeight in 5508, 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=5508)
0.125 = coord(1/8)
- Source
- Journal of the American Society for Information Science. 24(1973) no.6, S.460-462
-
Garvey, W.D.: Communication: the essence of science : facilitating information exchange among librarians, scientists, engineers and students (1979)
0.00
0.0019524286 = product of:
0.015619429 = sum of:
0.015619429 = weight(_text_:of in 4318) [ClassicSimilarity], result of:
0.015619429 = score(doc=4318,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24188137 = fieldWeight in 4318, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.109375 = fieldNorm(doc=4318)
0.125 = coord(1/8)
-
Mulkay, M.J.: Sociology of the scientific research community (1977)
0.00
0.0019524286 = product of:
0.015619429 = sum of:
0.015619429 = weight(_text_:of in 284) [ClassicSimilarity], result of:
0.015619429 = score(doc=284,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.24188137 = fieldWeight in 284, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.109375 = fieldNorm(doc=284)
0.125 = coord(1/8)
-
Garfield, E.: Essays of an information scientist (1977-)
0.00
0.0013945919 = product of:
0.011156735 = sum of:
0.011156735 = weight(_text_:of in 2015) [ClassicSimilarity], result of:
0.011156735 = score(doc=2015,freq=2.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.17277241 = fieldWeight in 2015, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.078125 = fieldNorm(doc=2015)
0.125 = coord(1/8)