-
Broadfield, A.: ¬The philosophy of classification (1956)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 1256) [ClassicSimilarity], result of:
0.01353075 = score(doc=1256,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 1256, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=1256)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Eaton, T.: Dewey re-examined (1952)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 1715) [ClassicSimilarity], result of:
0.01353075 = score(doc=1715,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 1715, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=1715)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Haykin, D.J.: Subject headings: a practical guide (1951)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 1724) [ClassicSimilarity], result of:
0.01353075 = score(doc=1724,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 1724, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=1724)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Vickery, B.C.: Developments in subject indexing (1955)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 1899) [ClassicSimilarity], result of:
0.01353075 = score(doc=1899,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 1899, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=1899)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Vickery, B.C.: Systematic subject indexing (1953)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 2038) [ClassicSimilarity], result of:
0.01353075 = score(doc=2038,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 2038, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=2038)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Bertalanffy, L. von: General systems theory (1956)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 4704) [ClassicSimilarity], result of:
0.01353075 = score(doc=4704,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 4704, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=4704)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Witty, F.J.: ¬The Pinakes of Callimachus (1958)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 5253) [ClassicSimilarity], result of:
0.01353075 = score(doc=5253,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 5253, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=5253)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Bernier, C.L.: Correlative indexes : 1: alphabetical correlative indexes (1956)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 5459) [ClassicSimilarity], result of:
0.01353075 = score(doc=5459,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 5459, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=5459)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
MacKay, D.M.: Quantal aspects of information (1950)
0.00
0.0033826875 = product of:
0.006765375 = sum of:
0.006765375 = product of:
0.01353075 = sum of:
0.01353075 = weight(_text_:a in 6872) [ClassicSimilarity], result of:
0.01353075 = score(doc=6872,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25478977 = fieldWeight in 6872, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.15625 = fieldNorm(doc=6872)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Farradane, J.E.L.: ¬A scientific theory of classification and indexing : further considerations (1952)
0.00
0.00334869 = product of:
0.00669738 = sum of:
0.00669738 = product of:
0.01339476 = sum of:
0.01339476 = weight(_text_:a in 1655) [ClassicSimilarity], result of:
0.01339476 = score(doc=1655,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25222903 = fieldWeight in 1655, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.109375 = fieldNorm(doc=1655)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Cole, P.F.: ¬The analysis of reference question records as a guide to the information requirements of scientists (1958)
0.00
0.00334869 = product of:
0.00669738 = sum of:
0.00669738 = product of:
0.01339476 = sum of:
0.01339476 = weight(_text_:a in 3866) [ClassicSimilarity], result of:
0.01339476 = score(doc=3866,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25222903 = fieldWeight in 3866, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.109375 = fieldNorm(doc=3866)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Anker, J.: Some principles of a systematically arranged subject catalogue with an index (1956)
0.00
0.00334869 = product of:
0.00669738 = sum of:
0.00669738 = product of:
0.01339476 = sum of:
0.01339476 = weight(_text_:a in 696) [ClassicSimilarity], result of:
0.01339476 = score(doc=696,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25222903 = fieldWeight in 696, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.109375 = fieldNorm(doc=696)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Ranganathan, S.R.: Library classification as a discipline (1957)
0.00
0.00334869 = product of:
0.00669738 = sum of:
0.00669738 = product of:
0.01339476 = sum of:
0.01339476 = weight(_text_:a in 564) [ClassicSimilarity], result of:
0.01339476 = score(doc=564,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25222903 = fieldWeight in 564, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.109375 = fieldNorm(doc=564)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Mills, J.: Classification of a subject field (1957)
0.00
0.00334869 = product of:
0.00669738 = sum of:
0.00669738 = product of:
0.01339476 = sum of:
0.01339476 = weight(_text_:a in 565) [ClassicSimilarity], result of:
0.01339476 = score(doc=565,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.25222903 = fieldWeight in 565, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.109375 = fieldNorm(doc=565)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Farradane, J.E.L.: ¬A scientific theory of classification and indexing and its practical applications (1950)
0.00
0.0032090992 = product of:
0.0064181983 = sum of:
0.0064181983 = product of:
0.012836397 = sum of:
0.012836397 = weight(_text_:a in 1654) [ClassicSimilarity], result of:
0.012836397 = score(doc=1654,freq=20.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.24171482 = fieldWeight in 1654, product of:
4.472136 = tf(freq=20.0), with freq of:
20.0 = termFreq=20.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046875 = fieldNorm(doc=1654)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- A classification is a theory of the structure of knowledge. From a discussion of the nature of truth, it is held that scientific knowledge is the only knowledge which can be regarded as true. The method of induction from empirical data is therefore applied to the construction of a classification. Items of knowledge are divided into uniquely definable terms, called isolates, and the relations between them, called operators. It is shown that only four basic operators exist, expressing appurtenance, equivalence, reaction and causation; using symbols for these operators, all subjects can be analysed in a linear form called an analet. With the addition of the permissible permutations of such analets, formed according to simple rules, alphabetical arrangement of the first terms provide a complete, logical subject index. Examples are given, and possible difficulties are considered. A classification can then be constructed by selection of deductive relations, arranged in hierarchical form. The nature of possible classifications is discussed. It is claimed that such an inductively constructed classification is the only true representation of the structure of knowledge, and that these principles provide a simple technique for accurately and fully indexing and classifying any given set of data, with complete flexibility
- Type
- a
-
Vickery, B.C.: Relations between subject fields : problems of constructing a general classification (1957)
0.00
0.0028703054 = product of:
0.005740611 = sum of:
0.005740611 = product of:
0.011481222 = sum of:
0.011481222 = weight(_text_:a in 566) [ClassicSimilarity], result of:
0.011481222 = score(doc=566,freq=4.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.2161963 = fieldWeight in 566, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.09375 = fieldNorm(doc=566)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Bar-Hillel, Y.; Carnap, R.: ¬An outline of a theory of semantic information (1952)
0.00
0.0028047764 = product of:
0.005609553 = sum of:
0.005609553 = product of:
0.011219106 = sum of:
0.011219106 = weight(_text_:a in 3369) [ClassicSimilarity], result of:
0.011219106 = score(doc=3369,freq=22.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.21126054 = fieldWeight in 3369, product of:
4.690416 = tf(freq=22.0), with freq of:
22.0 = termFreq=22.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0390625 = fieldNorm(doc=3369)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- In distinction to current Theory of Communication which treats amount of information as a measure of the statistical rarity of a message, a Theory of Semantic Information is outlined, in which the concept of information carried by a sentence within a given language system is treated as synonymous with the content of this sentence, normalized in a certain way, and the concept of amount of semantic information is explicated by various measures of this content, all based on logical probability functions ranging over the contents. Absolute and relative measures are distinguished, so are D-functions suitable for contexts where deductive reasoning alone is relevant and I-functions suitable for contexts where inductive reasoning is adequate. Of the two major types of amount of information investigated, the one, cont, is additive with respect to sentences whose contents are exclusive, the other, inf, with respect to sentences which are inductively independent. The latter turns out to be formally analogous to the customary information measure function. Various estimate functions of amount of information are investigated leading to generalized semantic correlates of concepts and theorems of current Communication Theory. A concept of semantic noise is tentatively defined, so are efficiency and redundancy of the conceptual framework of a language system. It is suggested that semantic information is a concept more readily applicable to psychological and other investigations than its communicational counterpart.
- Type
- a
-
Bibliography of papers on classification and allied subjects (1956)
0.00
0.00270615 = product of:
0.0054123 = sum of:
0.0054123 = product of:
0.0108246 = sum of:
0.0108246 = weight(_text_:a in 294) [ClassicSimilarity], result of:
0.0108246 = score(doc=294,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 294, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=294)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
CRG-Bulletin No.5 (1959)
0.00
0.00270615 = product of:
0.0054123 = sum of:
0.0054123 = product of:
0.0108246 = sum of:
0.0108246 = weight(_text_:a in 299) [ClassicSimilarity], result of:
0.0108246 = score(doc=299,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 299, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=299)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Garside, K.: Subject cataloguing in German libraries (1950)
0.00
0.00270615 = product of:
0.0054123 = sum of:
0.0054123 = product of:
0.0108246 = sum of:
0.0108246 = weight(_text_:a in 600) [ClassicSimilarity], result of:
0.0108246 = score(doc=600,freq=2.0), product of:
0.053105544 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.046056706 = queryNorm
0.20383182 = fieldWeight in 600, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.125 = fieldNorm(doc=600)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
