-
Lancaster, F.W.: Vocabulary control in information retrieval systems (1977)
0.02
0.020472093 = product of:
0.10236046 = sum of:
0.025003234 = weight(_text_:und in 1774) [ClassicSimilarity], result of:
0.025003234 = score(doc=1774,freq=2.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.39180204 = fieldWeight in 1774, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.125 = fieldNorm(doc=1774)
0.025003234 = weight(_text_:und in 1774) [ClassicSimilarity], result of:
0.025003234 = score(doc=1774,freq=2.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.39180204 = fieldWeight in 1774, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.125 = fieldNorm(doc=1774)
0.039035093 = weight(_text_:des in 1774) [ClassicSimilarity], result of:
0.039035093 = score(doc=1774,freq=2.0), product of:
0.079736836 = queryWeight, product of:
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.02879306 = queryNorm
0.48954904 = fieldWeight in 1774, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.125 = fieldNorm(doc=1774)
0.013318894 = weight(_text_:in in 1774) [ClassicSimilarity], result of:
0.013318894 = score(doc=1774,freq=4.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.34006363 = fieldWeight in 1774, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.125 = fieldNorm(doc=1774)
0.2 = coord(4/20)
- Source
- Advances in librarianship. 7(1977), S.1-40
- Theme
- Konzeption und Anwendung des Prinzips Thesaurus
-
Krooks, D.A.; Lancaster, F.W.: ¬The evolution of guidelines for thesaurus construction (1993)
0.02
0.0154821 = product of:
0.0619284 = sum of:
0.012501617 = weight(_text_:und in 7128) [ClassicSimilarity], result of:
0.012501617 = score(doc=7128,freq=2.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.19590102 = fieldWeight in 7128, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=7128)
0.012698677 = weight(_text_:der in 7128) [ClassicSimilarity], result of:
0.012698677 = score(doc=7128,freq=2.0), product of:
0.06431698 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02879306 = queryNorm
0.19743896 = fieldWeight in 7128, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0625 = fieldNorm(doc=7128)
0.012501617 = weight(_text_:und in 7128) [ClassicSimilarity], result of:
0.012501617 = score(doc=7128,freq=2.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.19590102 = fieldWeight in 7128, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=7128)
0.019517547 = weight(_text_:des in 7128) [ClassicSimilarity], result of:
0.019517547 = score(doc=7128,freq=2.0), product of:
0.079736836 = queryWeight, product of:
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.02879306 = queryNorm
0.24477452 = fieldWeight in 7128, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.0625 = fieldNorm(doc=7128)
0.00470894 = weight(_text_:in in 7128) [ClassicSimilarity], result of:
0.00470894 = score(doc=7128,freq=2.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.120230645 = fieldWeight in 7128, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=7128)
0.25 = coord(5/20)
- Abstract
- This piece of research traces the evolution of guidelines and principles for the construction of information retrieval thesauri from 1959 to 1993. We conclude that the majority of the basic problems of thesaurus construction has already been identified and solved by 1967 and that Eugene Wall, more than any other individual, has profoundly influenced the entire development in this area
- Theme
- Geschichte der Sacherschließung
Konzeption und Anwendung des Prinzips Thesaurus
-
Lancaster, F.W.: Vocabulary control for information retrieval (1986)
0.01
0.009841608 = product of:
0.065610714 = sum of:
0.025003234 = weight(_text_:und in 217) [ClassicSimilarity], result of:
0.025003234 = score(doc=217,freq=8.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.39180204 = fieldWeight in 217, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=217)
0.025003234 = weight(_text_:und in 217) [ClassicSimilarity], result of:
0.025003234 = score(doc=217,freq=8.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.39180204 = fieldWeight in 217, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=217)
0.015604248 = product of:
0.031208497 = sum of:
0.031208497 = weight(_text_:22 in 217) [ClassicSimilarity], result of:
0.031208497 = score(doc=217,freq=2.0), product of:
0.10082839 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02879306 = 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)
0.15 = coord(3/20)
- Classification
- ST 271 Informatik / Monographien / Software und -entwicklung / Datenbanken, Datenbanksysteme, Data base management, Informationssysteme / Einzelne Datenbanksprachen und Datenbanksysteme
- Date
- 22. 4.2007 10:07:51
- RVK
- ST 271 Informatik / Monographien / Software und -entwicklung / Datenbanken, Datenbanksysteme, Data base management, Informationssysteme / Einzelne Datenbanksprachen und Datenbanksysteme
-
Lancaster, F.W.: Has technology improved subject access? (199?)
0.00
0.0033876717 = product of:
0.033876717 = sum of:
0.022222685 = weight(_text_:der in 184) [ClassicSimilarity], result of:
0.022222685 = score(doc=184,freq=2.0), product of:
0.06431698 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02879306 = queryNorm
0.34551817 = fieldWeight in 184, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.109375 = fieldNorm(doc=184)
0.011654032 = weight(_text_:in in 184) [ClassicSimilarity], result of:
0.011654032 = score(doc=184,freq=4.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.29755569 = fieldWeight in 184, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.109375 = fieldNorm(doc=184)
0.1 = coord(2/20)
- Footnote
- Vortrag an der FHBD 1994; Originalvortrag: International Conference on new Frontiers in Library and Information Services in Taipei, Taiwan, May 9-11, 1991
-
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)
0.00
0.0033426199 = product of:
0.022284131 = sum of:
0.009376213 = weight(_text_:und in 8372) [ClassicSimilarity], result of:
0.009376213 = score(doc=8372,freq=2.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.14692576 = fieldWeight in 8372, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.046875 = fieldNorm(doc=8372)
0.009376213 = weight(_text_:und in 8372) [ClassicSimilarity], result of:
0.009376213 = score(doc=8372,freq=2.0), product of:
0.06381599 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.02879306 = queryNorm
0.14692576 = fieldWeight in 8372, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.046875 = fieldNorm(doc=8372)
0.003531705 = weight(_text_:in in 8372) [ClassicSimilarity], result of:
0.003531705 = score(doc=8372,freq=2.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.09017298 = fieldWeight in 8372, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.046875 = fieldNorm(doc=8372)
0.15 = coord(3/20)
- Abstract
- The results of 35 searches performed by users (end users) of an academic library (Illinois Stae University, Milner Library) in the ERIC databases on CD-ROM were compared with the results for the same topics achieved by an experienced education librarian and by a team of librarians. Recall ratios, precision ratios, and novelty ratios were calculated. Results show that the users, all faculty members or graduate students, found only about a third of the really important items. Suggests that library users are frequently misled into thinking that CD-ROM databases are easy to use and that the 'technology' guarantees satisfactory results.
- 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.; Warner, A.J.: Information retrieval today (1993)
0.00
0.0030283108 = product of:
0.030283108 = sum of:
0.024396934 = weight(_text_:des in 4607) [ClassicSimilarity], result of:
0.024396934 = score(doc=4607,freq=2.0), product of:
0.079736836 = queryWeight, product of:
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.02879306 = queryNorm
0.30596817 = fieldWeight in 4607, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.078125 = fieldNorm(doc=4607)
0.005886175 = weight(_text_:in in 4607) [ClassicSimilarity], result of:
0.005886175 = score(doc=4607,freq=2.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.15028831 = fieldWeight in 4607, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.078125 = fieldNorm(doc=4607)
0.1 = coord(2/20)
- Content
- Es handelt sich um die 3. Aufl. von: 'Information retrieval systems: characteristics, testing and evaluation' des ersten Autors
- Footnote
- Rez. in: Information processing and management 30(1994) no.4, S.581-582 (L. Schamber); Journal of documentation 51(1995) no.1, S.76-77 (B. Frohmann)
-
Lancaster, F.W.: Librarians, technology and mediocrity (1993)
0.00
0.0020854801 = product of:
0.020854801 = sum of:
0.012698677 = weight(_text_:der in 7006) [ClassicSimilarity], result of:
0.012698677 = score(doc=7006,freq=2.0), product of:
0.06431698 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02879306 = queryNorm
0.19743896 = fieldWeight in 7006, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0625 = fieldNorm(doc=7006)
0.0081561245 = weight(_text_:in in 7006) [ClassicSimilarity], result of:
0.0081561245 = score(doc=7006,freq=6.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.2082456 = fieldWeight in 7006, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=7006)
0.1 = coord(2/20)
- Abstract
- Two years ago the author gave a keynote talk at the Essen Symposium that suggested that technology has lulled librarians into a false sense of security and that there is no real evidence that the increasing use of technology has improved library services at all. This talk carries this theme one stage further, suggesting that technology may actually encourage mediocrity in library and information services
- Series
- Veröffentlichungen der Universitätsbibliothek Essen; 15
- Source
- Opportunity 2000: understanding and serving users in an electronic library; 15th Int. Symp., 12.-15.10.1992; Festschrift in honour of Herbert S. White. Ed.: A.H. Helal
-
Lancaster, F.W.: Evaluation in the context of the digital library (1996)
0.00
0.0017407619 = product of:
0.017407618 = sum of:
0.012698677 = weight(_text_:der in 7886) [ClassicSimilarity], result of:
0.012698677 = score(doc=7886,freq=2.0), product of:
0.06431698 = queryWeight, product of:
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.02879306 = queryNorm
0.19743896 = fieldWeight in 7886, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.2337668 = idf(docFreq=12875, maxDocs=44218)
0.0625 = fieldNorm(doc=7886)
0.00470894 = weight(_text_:in in 7886) [ClassicSimilarity], result of:
0.00470894 = score(doc=7886,freq=2.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.120230645 = fieldWeight in 7886, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=7886)
0.1 = coord(2/20)
- Series
- Veröffentlichungen der Universitätsbibliothek Essen; 21
-
Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985)
0.00
0.0015988116 = product of:
0.015988115 = sum of:
0.009758773 = weight(_text_:des in 3649) [ClassicSimilarity], result of:
0.009758773 = score(doc=3649,freq=2.0), product of:
0.079736836 = queryWeight, product of:
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.02879306 = queryNorm
0.12238726 = fieldWeight in 3649, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.7693076 = idf(docFreq=7536, maxDocs=44218)
0.03125 = fieldNorm(doc=3649)
0.006229343 = weight(_text_:in in 3649) [ClassicSimilarity], result of:
0.006229343 = score(doc=3649,freq=14.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.15905021 = fieldWeight in 3649, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.03125 = fieldNorm(doc=3649)
0.1 = coord(2/20)
- Abstract
- F. W. Lancaster is known for his writing an the state of the art in librarylinformation science. His skill in identifying significant contributions and synthesizing literature in fields as diverse as online systems, vocabulary control, measurement and evaluation, and the paperless society have earned him esteem as a chronicler of information science. Equally deserving of repute is his own contribution to research in the discipline-his evaluation of the MEDLARS operating system. The MEDLARS study is notable for several reasons. It was the first large-scale application of retrieval experiment methodology to the evaluation of an actual operating system. As such, problems had to be faced that do not arise in laboratory-like conditions. One example is the problem of recall: how to determine, for a very large and dynamic database, the number of documents relevant to a given search request. By solving this problem and others attendant upon transferring an experimental methodology to the real world, Lancaster created a constructive procedure that could be used to improve the design and functioning of retrieval systems. The MEDLARS study is notable also for its contribution to our understanding of what constitutes a good index language and good indexing. The ideal retrieval system would be one that retrieves all and only relevant documents. The failures that occur in real operating systems, when a relevant document is not retrieved (a recall failure) or an irrelevant document is retrieved (a precision failure), can be analysed to assess the impact of various factors an the performance of the system. This is exactly what Lancaster did. He found both the MEDLARS indexing and the McSH index language to be significant factors affecting retrieval performance. The indexing, primarily because it was insufficiently exhaustive, explained a large number of recall failures. The index language, largely because of its insufficient specificity, accounted for a large number of precision failures. The purpose of identifying factors responsible for a system's failures is ultimately to improve the system. Unlike many user studies, the MEDLARS evaluation yielded recommendations that were eventually implemented.* Indexing exhaustivity was increased and the McSH index language was enriched with more specific terms and a larger entry vocabulary.
- Footnote
- Nachdruck des Originalartikels mit Kommentierung durch die Herausgeber
Original in: Journal of the American Medical Association 207(1969) S.114-120.
-
Lancaster, F.W.: On the need for role indicators in postcoordinate retrieval systems (1968)
0.00
6.229343E-4 = product of:
0.012458686 = sum of:
0.012458686 = weight(_text_:in in 8948) [ClassicSimilarity], result of:
0.012458686 = score(doc=8948,freq=14.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.31810042 = fieldWeight in 8948, product of:
3.7416575 = tf(freq=14.0), with freq of:
14.0 = termFreq=14.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=8948)
0.05 = coord(1/20)
- Abstract
- A summary of the findings of various evaluations of role indicators is given. In general, the results have been negative in that little real evidence for the value of the devices has been presented. The need for roles in various subject fields and in very large systems, is discussed. They can only by justified on purely ecomic grounds - if the added cost involved in their use is offset by substantial reduction in the amount of output screening that must be done by the end user
-
Lancaster, F.W.: Libraries and librarians in an age of electronics (1982)
0.00
5.886175E-4 = product of:
0.01177235 = sum of:
0.01177235 = weight(_text_:in in 6184) [ClassicSimilarity], result of:
0.01177235 = score(doc=6184,freq=2.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.30057663 = fieldWeight in 6184, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.15625 = fieldNorm(doc=6184)
0.05 = coord(1/20)
-
Lancaster, F.W.: Artificial intelligence, expert systems and the digital library (1996)
0.00
5.2647555E-4 = product of:
0.010529511 = sum of:
0.010529511 = weight(_text_:in in 839) [ClassicSimilarity], result of:
0.010529511 = score(doc=839,freq=10.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.26884392 = fieldWeight in 839, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=839)
0.05 = coord(1/20)
- Abstract
- Based partly on chapters in a forthcoming book 'Technology and Management in Library and Information Sciences' by F.W. Lancaster and B. Sandore. Some inportant functions of a research library operating largely in a networked digital environment are illustrated. The ability of artificial intelligence and expert system technologies to contribute to these functions is discussed, in the light of a report from the American Association for Artificial Intelligence, as well as experiences with these technologies in the library world and elsewhere
-
Lancaster, F.W.; Connell, T.H.; Bishop, N.; McCowan, S.: Identifying barriers to effective subject access in library catalogs (1991)
0.00
5.0463446E-4 = product of:
0.010092689 = sum of:
0.010092689 = weight(_text_:in in 2259) [ClassicSimilarity], result of:
0.010092689 = score(doc=2259,freq=12.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.2576908 = fieldWeight in 2259, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0546875 = fieldNorm(doc=2259)
0.05 = coord(1/20)
- Abstract
- 51 subject searches were performed in an online catalog containing about 4,5 million records. Their success was judges in terms of lists of items, known to be relevant to the various topics, compiled by subject specialists (faculty members or authors of articles in specialized encyclopedias). Many of the items known to be relevant were not retrieved, even in very broad searches that sometimes retrieved several hundred records, and very little could be done to make them retrievable within the constraints of present cataloging practice. Librarians should recognize that library catalogs, as now implemented, offer only the most primitive of subject access and should seek to develop different types of subject access tools. - Vgl auch Letter (B.H. Weinberg) in: LTRS 36(1992) S.123-124.
-
Lancaster, F.W.: From custodian to knowledge engineer : the evolution of librarianship as a profession (1995)
0.00
5.0463446E-4 = product of:
0.010092689 = sum of:
0.010092689 = weight(_text_:in in 3058) [ClassicSimilarity], result of:
0.010092689 = score(doc=3058,freq=12.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.2576908 = fieldWeight in 3058, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0546875 = fieldNorm(doc=3058)
0.05 = coord(1/20)
- Abstract
- In the monastic library of the Middle Ages, the librarian was essentially a curator, a preserver of collections. For most of history libarians were little more than custodians. The idea of a librarian as a provider of services rather than a collector or preserver of materials, did not emerge until late in the 19th century. Computer and telecommunications technologies have revolutionized the library and greatly expanded the horizons of the librarian. Discusses the ways in which technology has affected the library profession and discusses the role of the librarian in the future. The librarian will increasingly become an information intermediary or information consultant and some will be knowledge engineers involved in the design and construction of information systems and in electronic publishing
-
Lancaster, F.W.: Trends in subject indexing from 1957 to 2000 (1980)
0.00
5.0463446E-4 = product of:
0.010092689 = sum of:
0.010092689 = weight(_text_:in in 208) [ClassicSimilarity], result of:
0.010092689 = score(doc=208,freq=12.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.2576908 = fieldWeight in 208, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0546875 = fieldNorm(doc=208)
0.05 = coord(1/20)
- Abstract
- Computer have been used in 2 areas of printed index production: to sort entries and fromat printed indexes, and to derive a series of index entries from a minimum intellectual input. Computer indexing enables more indexing terms to be used as well as weighted terms, links and roles. Interest in automatic indexing peaked in the mid-1960s and has since declined. Interest in machine-aided indexing concentrates on using the computer for on-line display or for indexing by extraction. Computers have also made possible the implementation of retrieval systems without indexing-free text systems. Considers future prospects and needs
- Source
- New trends in documentation and information: proceedings of the 39th FID Congress, University of Edinburgh, 25-28 Sept 1978. Ed.: P.J. Taylor
-
Qin, J.; Lancaster, F.W.; Allen, B.: Types and levels of collaboration in interdisciplinary research in the sciences (1997)
0.00
5.0463446E-4 = product of:
0.010092689 = sum of:
0.010092689 = weight(_text_:in in 1593) [ClassicSimilarity], result of:
0.010092689 = score(doc=1593,freq=12.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.2576908 = fieldWeight in 1593, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0546875 = fieldNorm(doc=1593)
0.05 = coord(1/20)
- Abstract
- Reports on a study which collected a sample of 846 scientific research papers published in 1992 and tests 3 hypotheses on the relationship between research collaboration and interdisciplinarity. Results showed significant differences in degrees of interdisciplinarity among different levels of collaboration and among different disciplines. Collaboration contributed significantly to the degree of interdisciplinarity in some disciplines and not in others. Uses a survey that asked authors about their form of collaboration, channels of communication and use of information. The survey provides some qualitative explanation for the bibliometrics findings. Discusses the perspective of scientist-scientist interaction, scientist-information interaction and information-information interaction
-
Lancaster, F.W.: MEDLARS : report on the evaluation of its operating effiency (1961)
0.00
4.994586E-4 = product of:
0.009989171 = sum of:
0.009989171 = weight(_text_:in in 1931) [ClassicSimilarity], result of:
0.009989171 = score(doc=1931,freq=4.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.25504774 = fieldWeight in 1931, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.09375 = fieldNorm(doc=1931)
0.05 = coord(1/20)
- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.223-246.
-
Lancaster, F.W.: Indexing and abstracting in theory and practice (2003)
0.00
4.994586E-4 = product of:
0.009989171 = sum of:
0.009989171 = weight(_text_:in in 4913) [ClassicSimilarity], result of:
0.009989171 = score(doc=4913,freq=16.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.25504774 = fieldWeight in 4913, product of:
4.0 = tf(freq=16.0), with freq of:
16.0 = termFreq=16.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.046875 = fieldNorm(doc=4913)
0.05 = coord(1/20)
- Content
- Covers: indexing principles and practice; precoordinate indexes; consistency and quality of indexing; types and functions of abstracts; writing an abstract; evaluation theory and practice; approaches used in indexing and abstracting services; indexing enhancement; natural language in information retrieval; indexing and abstracting of imaginative works; databases of images and sound; automatic indexing and abstracting; the future of indexing and abstracting services
- Footnote
- Rez. in: JASIST 57(2006) no.1, S.144-145 (H. Saggion): "... This volume is a very valuable source of information for not only students and professionals in library and information science but also for individuals and institutions involved in knowledge management and organization activities. Because of its broad coverage of the information science topic, teachers will find the contents of this book useful for courses in the areas of information technology, digital as well as traditional libraries, and information science in general."
-
Lancaster, F.W.: Evaluation of expert systems in information service applications (1994)
0.00
4.1203224E-4 = product of:
0.008240645 = sum of:
0.008240645 = weight(_text_:in in 8905) [ClassicSimilarity], result of:
0.008240645 = score(doc=8905,freq=2.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.21040362 = fieldWeight in 8905, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.109375 = fieldNorm(doc=8905)
0.05 = coord(1/20)
-
Elzy, C.; Nourie, A.; Lancaster, F.W.; Joseph, K.M.: Evaluating reference service in a large academic library (1991)
0.00
4.1203224E-4 = product of:
0.008240645 = sum of:
0.008240645 = weight(_text_:in in 4015) [ClassicSimilarity], result of:
0.008240645 = score(doc=4015,freq=8.0), product of:
0.039165888 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.02879306 = queryNorm
0.21040362 = fieldWeight in 4015, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0546875 = fieldNorm(doc=4015)
0.05 = coord(1/20)
- Abstract
- Reports an unobtrusive study of the ability of professional librarians to deal with factual questions conducted at the Milner Library, Illinois State University. Standards were recruited to pose questions for which answers were known, to 19 librarians in 5 departments. In all, 190 test incidents (10 questions for each of the 19 librarians) were used. Librarians were evaluated on the accuracy of the responses given and on their responsiveness and helpfulness, as judged by the student proxies. Describes the methods used in the study, including the accuracy and attitude scales developed, presents the major results, and makes suggestions on the follow-up action that seems appropriate after a study of this kind has been performed
