-
Milstead, J.L.: Thesauri in a full-text world (1998)
0.05
0.053340062 = product of:
0.080010094 = sum of:
0.017693711 = weight(_text_:information in 2337) [ClassicSimilarity], result of:
0.017693711 = score(doc=2337,freq=8.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.19395474 = fieldWeight in 2337, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.06231638 = sum of:
0.027112689 = weight(_text_:systems in 2337) [ClassicSimilarity], result of:
0.027112689 = score(doc=2337,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.1697705 = fieldWeight in 2337, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.03520369 = weight(_text_:22 in 2337) [ClassicSimilarity], result of:
0.03520369 = score(doc=2337,freq=2.0), product of:
0.1819777 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051966466 = queryNorm
0.19345059 = fieldWeight in 2337, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2337)
0.6666667 = coord(2/3)
- Abstract
- Despite early claims to the contemporary, thesauri continue to find use as access tools for information in the full-text environment. Their mode of use is changing, but this change actually represents an expansion rather than a contrdiction of their utility. Thesauri and similar vocabulary tools can complement full-text access by aiding users in focusing their searches, by supplementing the linguistic analysis of the text search engine, and even by serving as one of the tools used by the linguistic engine for its analysis. While human indexing contunues to be used for many databases, the trend is to increase the use of machine aids for this purpose. All machine-aided indexing (MAI) systems rely on thesauri as the basis for term selection. In the 21st century, the balance of effort between human and machine will change at both input and output, but thesauri will continue to play an important role for the foreseeable future
- Date
- 22. 9.1997 19:16:05
- Imprint
- Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
- Source
- Visualizing subject access for 21st century information resources: Papers presented at the 1997 Clinic on Library Applications of Data Processing, 2-4 Mar 1997, Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign. Ed.: P.A. Cochrane et al
-
Intelligent information systems: progress and prospects (1986)
0.04
0.03842906 = product of:
0.057643585 = sum of:
0.024771197 = weight(_text_:information in 1050) [ClassicSimilarity], result of:
0.024771197 = score(doc=1050,freq=8.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.27153665 = fieldWeight in 1050, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0546875 = fieldNorm(doc=1050)
0.032872386 = product of:
0.06574477 = sum of:
0.06574477 = weight(_text_:systems in 1050) [ClassicSimilarity], result of:
0.06574477 = score(doc=1050,freq=6.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.41167158 = fieldWeight in 1050, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0546875 = fieldNorm(doc=1050)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Content
- Enthält die Beiträge: SOMMERVILLE, I., M. WOOD: A software components catalogue; COELHO, H.: Library manager: a case study in knowledge engineering; DAVIES, R.: Cataloguing as a domain for an expert system; POLLITT, A.S.: A rule-base system as an intermediary for searching cancer therapy literature on MEDLINE; LEBOWITZ, M.: An experiment in intelligent information systems: RESEARCHER; VICKERY, A., H.M. BROOKS u. B.C. VICKERY: An expert system for referral: the PLEXUS project; RICH, E.: Users are individuals: individualizing user models; INGWERSEN, P.: Cognitive analysis and the role of the intermediary in information retrieval; SHAW, M.L.G. u. B.R. GAINES: A cognitive model for intelligent information systems; DAVIES, R.: Classification and ratiocination: a perennial quest
-
Blair, D.C.: Language and representation in information retrieval (1991)
0.03
0.03472209 = product of:
0.052083135 = sum of:
0.025518233 = weight(_text_:information in 1545) [ClassicSimilarity], result of:
0.025518233 = score(doc=1545,freq=26.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.2797255 = fieldWeight in 1545, product of:
5.0990195 = tf(freq=26.0), with freq of:
26.0 = termFreq=26.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.03125 = fieldNorm(doc=1545)
0.0265649 = product of:
0.0531298 = sum of:
0.0531298 = weight(_text_:systems in 1545) [ClassicSimilarity], result of:
0.0531298 = score(doc=1545,freq=12.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.33268085 = fieldWeight in 1545, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.03125 = fieldNorm(doc=1545)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Information or Document Retrieval is the subject of this book. It is not an introductory book, although it is self-contained in the sense that it is not necessary to have a background in the theory or practice of Information Retrieval in order to understand its arguments. The book presents, as clearly as possible, one particular perspective on Information Retrieval, and attempts to say that certain aspects of the theory or practice of the management of documents are more important than others. The majority of Information Retrieval research has been aimed at the more experimentally tractable small-scale systems, and although much of that work has added greatly to our understanding of Information Retrieval it is becoming increasingly apparent that retrieval systems with large data bases of documents are a fundamentally different genre of systems than small-scale systems. If this is so, which is the thesis of this book, then we must now study large information retrieval systems with the same rigor and intensity that we once studied small-scale systems. Hegel observed that the quantitative growth of any system caused qualitative changes to take place in its structure and processes.
- COMPASS
- Information retrieval
- LCSH
- Information Retrieval
- RSWK
- Information Retrieval
- Subject
- Information retrieval
Information Retrieval
Information Retrieval
-
Hildreth, C.R.: Intelligent interfaces and retrieval methods for subject searching in bibliographic retrieval systems (1989)
0.03
0.029870933 = product of:
0.0448064 = sum of:
0.017693711 = weight(_text_:information in 2306) [ClassicSimilarity], result of:
0.017693711 = score(doc=2306,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.19395474 = fieldWeight in 2306, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.078125 = fieldNorm(doc=2306)
0.027112689 = product of:
0.054225378 = sum of:
0.054225378 = weight(_text_:systems in 2306) [ClassicSimilarity], result of:
0.054225378 = score(doc=2306,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.339541 = fieldWeight in 2306, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.078125 = fieldNorm(doc=2306)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Series
- Advances in library information technology; 2
-
Devadason, F.J.; Kumbhar, M.R.: Language and indexing language : Nalimor and Gardin revised (1988)
0.03
0.029870933 = product of:
0.0448064 = sum of:
0.017693711 = weight(_text_:information in 2852) [ClassicSimilarity], result of:
0.017693711 = score(doc=2852,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.19395474 = fieldWeight in 2852, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.078125 = fieldNorm(doc=2852)
0.027112689 = product of:
0.054225378 = sum of:
0.054225378 = weight(_text_:systems in 2852) [ClassicSimilarity], result of:
0.054225378 = score(doc=2852,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.339541 = fieldWeight in 2852, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.078125 = fieldNorm(doc=2852)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Studies the salient features of ordinary language as a means of designing languages for information storage and retrieval systems. Pays particular attention to the POPSI (Postulate-based Permuted Subject Indexing) language.
-
Miller, U.; Teitelbaum, R.: Pre-coordination and post-coordination : past and future (2002)
0.03
0.029166719 = product of:
0.043750077 = sum of:
0.024771197 = weight(_text_:information in 1395) [ClassicSimilarity], result of:
0.024771197 = score(doc=1395,freq=8.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.27153665 = fieldWeight in 1395, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0546875 = fieldNorm(doc=1395)
0.01897888 = product of:
0.03795776 = sum of:
0.03795776 = weight(_text_:systems in 1395) [ClassicSimilarity], result of:
0.03795776 = score(doc=1395,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.23767869 = fieldWeight in 1395, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0546875 = fieldNorm(doc=1395)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- This article deals with the meaningful processing of information in relation to two systems of Information processing: pre-coordination and post-coordination. The different approaches are discussed, with emphasis an the need for a controlled vocabulary in information retrieval. Assigned indexing, which employs a controlled vocabulary, is described in detail. Types of indexing language can be divided into two broad groups - those using pre-coordinated terms and those depending an post-coordination. They represent two different basic approaches in processing and Information retrieval. The historical development of these two approaches is described, as well as the two tools that apply to these approaches: thesauri and subject headings.
-
Mu, X.; Lu, K.; Ryu, H.: Explicitly integrating MeSH thesaurus help into health information retrieval systems : an empirical user study (2014)
0.03
0.028841633 = product of:
0.04326245 = sum of:
0.01978217 = weight(_text_:information in 2703) [ClassicSimilarity], result of:
0.01978217 = score(doc=2703,freq=10.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.21684799 = fieldWeight in 2703, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0390625 = fieldNorm(doc=2703)
0.023480278 = product of:
0.046960555 = sum of:
0.046960555 = weight(_text_:systems in 2703) [ClassicSimilarity], result of:
0.046960555 = score(doc=2703,freq=6.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.29405114 = fieldWeight in 2703, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0390625 = fieldNorm(doc=2703)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- When consumers search for health information, a major obstacle is their unfamiliarity with the medical terminology. Even though medical thesauri such as the Medical Subject Headings (MeSH) and related tools (e.g., the MeSH Browser) were created to help consumers find medical term definitions, the lack of direct and explicit integration of these help tools into a health retrieval system prevented them from effectively achieving their objectives. To explore this issue, we conducted an empirical study with two systems: One is a simple interface system supporting query-based searching; the other is an augmented system with two new components supporting MeSH term searching and MeSH tree browsing. A total of 45 subjects were recruited to participate in the study. The results indicated that the augmented system is more effective than the simple system in terms of improving user-perceived topic familiarity and question-answer performance, even though we did not find users spend more time on the augmented system. The two new MeSH help components played a critical role in participants' health information retrieval and were found to allow them to develop new search strategies. The findings of the study enhanced our understanding of consumers' search behaviors and shed light on the design of future health information retrieval systems.
- Source
- Information processing and management. 50(2014) no.1, S.24-40
-
Poynder, R.: Web research engines? (1996)
0.02
0.022414736 = product of:
0.033622105 = sum of:
0.010616227 = weight(_text_:information in 5698) [ClassicSimilarity], result of:
0.010616227 = score(doc=5698,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.116372846 = fieldWeight in 5698, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.023005879 = product of:
0.046011757 = sum of:
0.046011757 = weight(_text_:systems in 5698) [ClassicSimilarity], result of:
0.046011757 = score(doc=5698,freq=4.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.28811008 = fieldWeight in 5698, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.046875 = fieldNorm(doc=5698)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Describes the shortcomings of search engines for the WWW comparing their current capabilities to those of the first generation CD-ROM products. Some allow phrase searching and most are improving their Boolean searching. Few allow truncation, wild cards or nested logic. They are stateless, losing previous search criteria. Unlike the indexing and classification systems for today's CD-ROMs, those for Web pages are random, unstructured and of variable quality. Considers that at best Web search engines can only offer free text searching. Discusses whether automatic data classification systems such as Infoseek Ultra can overcome the haphazard nature of the Web with neural network technology, and whether Boolean search techniques may be redundant when replaced by technology such as the Euroferret search engine. However, artificial intelligence is rarely successful on huge, varied databases. Relevance ranking and automatic query expansion still use the same simple inverted indexes. Most Web search engines do nothing more than word counting. Further complications arise with foreign languages
- Source
- Information world review. 1996, no.120, S.47-48
-
Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000)
0.02
0.021158962 = product of:
0.03173844 = sum of:
0.010616227 = weight(_text_:information in 5920) [ClassicSimilarity], result of:
0.010616227 = score(doc=5920,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.116372846 = fieldWeight in 5920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.021122215 = product of:
0.04224443 = sum of:
0.04224443 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
0.04224443 = score(doc=5920,freq=2.0), product of:
0.1819777 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051966466 = queryNorm
0.23214069 = fieldWeight in 5920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Library of Congress Subject Headings (LCSH), a system originally designed as a tool for subject access to the Library's own collection in the late nineteenth century, has become, in the course of the last century, the main subject retrieval tool in library catalogs throughout the United States and in many other countries. It is one of the largest non-specialized controlled vocabularies in the world. As LCSH enters a new century, it faces an information environment that has undergone vast changes from what had prevailed when LCSH began, or, indeed, from its state in the early days of the online age. In order to continue its mission and to be useful in spheres outside library catalogs as well, LCSH must adapt to the multifarious environment. One possible approach is to adopt a series of scalable and flexible syntax and application rules to meet the needs of different user communities
- Date
- 27. 5.2001 16:22:21
-
Anderson, J.D.; Pérez-Carballo, J.: Library of Congress Subject Headings (LCSH) (2009)
0.02
0.021158962 = product of:
0.03173844 = sum of:
0.010616227 = weight(_text_:information in 3837) [ClassicSimilarity], result of:
0.010616227 = score(doc=3837,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.116372846 = fieldWeight in 3837, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=3837)
0.021122215 = product of:
0.04224443 = sum of:
0.04224443 = weight(_text_:22 in 3837) [ClassicSimilarity], result of:
0.04224443 = score(doc=3837,freq=2.0), product of:
0.1819777 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051966466 = queryNorm
0.23214069 = fieldWeight in 3837, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=3837)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 27. 8.2011 14:22:13
- Source
- Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
-
Pirmann, C.: Tags in the catalogue : insights from a usability study of LibraryThing for libraries (2012)
0.02
0.02112194 = product of:
0.03168291 = sum of:
0.012511344 = weight(_text_:information in 5570) [ClassicSimilarity], result of:
0.012511344 = score(doc=5570,freq=4.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.13714671 = fieldWeight in 5570, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0390625 = fieldNorm(doc=5570)
0.019171566 = product of:
0.03834313 = sum of:
0.03834313 = weight(_text_:systems in 5570) [ClassicSimilarity], result of:
0.03834313 = score(doc=5570,freq=4.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.24009174 = fieldWeight in 5570, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0390625 = fieldNorm(doc=5570)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Library of Congress Subject Headings (LCSH), the standard subject language used in library catalogues, are often criticized for their lack of currency, biased language, and atypical syndetic structure. Conversely, folksonomies (or tags), which rely on the natural language of their users, offer a flexibility often lacking in controlled vocabularies and may offer a means of augmenting more rigid controlled vocabularies such as LCSH. Content analysis studies have demonstrated the potential for folksonomies to be used as a means of enhancing subject access to materials, and libraries are beginning to integrate tagging systems into their catalogues. This study examines the utility of tags as a means of enhancing subject access to materials in library online public access catalogues (OPACs) through usability testing with the LibraryThing for Libraries catalogue enhancements. Findings indicate that while they cannot replace LCSH, tags do show promise for aiding information seeking in OPACs. In the context of information systems design, the study revealed that while folksonomies have the potential to enhance subject access to materials, that potential is severely limited by the current inability of catalogue interfaces to support tag-based searches alongside standard catalogue searches.
-
Drabenstott, K.M.; Vizine-Goetz, D.: Using subject headings for online retrieval : theory, practice and potential (1994)
0.02
0.02085415 = product of:
0.031281225 = sum of:
0.015013612 = weight(_text_:information in 386) [ClassicSimilarity], result of:
0.015013612 = score(doc=386,freq=4.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.16457605 = fieldWeight in 386, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=386)
0.016267613 = product of:
0.032535225 = sum of:
0.032535225 = weight(_text_:systems in 386) [ClassicSimilarity], result of:
0.032535225 = score(doc=386,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.2037246 = fieldWeight in 386, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.046875 = fieldNorm(doc=386)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Using subject headings for Online Retrieval is an indispensable tool for online system desingners who are developing new systems or refining exicting ones. The book describes subject analysis and subject searching in online catalogs, including the limitations of retrieval, and demonstrates how such limitations can be overcome through system design and programming. The book describes the Library of Congress Subject headings system and system characteristics, shows how information is stored in machine readable files, and offers examples of and recommendations for successful methods. Tables are included to support these recommendations, and diagrams, graphs, and bar charts are used to provide results of data analyses.
- Footnote
- Rez. in: Information processing and management 31(1995) no.3, S.450-451 (R.R. Larson); Library resources and technical services 41(1997) no.1, S.60-67 (B.H. Weinberg)
-
Walsh, J.: ¬The use of Library of Congress Subject Headings in digital collections (2011)
0.02
0.019661482 = product of:
0.029492222 = sum of:
0.01415497 = weight(_text_:information in 4549) [ClassicSimilarity], result of:
0.01415497 = score(doc=4549,freq=8.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.1551638 = fieldWeight in 4549, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.03125 = fieldNorm(doc=4549)
0.015337253 = product of:
0.030674506 = sum of:
0.030674506 = weight(_text_:systems in 4549) [ClassicSimilarity], result of:
0.030674506 = score(doc=4549,freq=4.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.19207339 = fieldWeight in 4549, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.03125 = fieldNorm(doc=4549)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Purpose - This paper attempts to explain the wide dissemination of Library of Congress Subject Headings (LCSH) within digital libraries and presents some of the advantages and disadvantages of using this controlled vocabulary in digital collections. The paper also presents other classifications used in digital collections for subject access and explores ways of improving search functionality in digital collections that employ LCSH. Design/methodology/approach - Unlike traditional libraries that use Library of Congress Classification for organization and retrieval, digital libraries use metadata forms for organization and retrieval. The collections exist in cyberspace of the internet which is known for containing the universe of knowledge. The use of LCSH for information retrieval has been widely criticized for its difficulty of use and its information retrieval effectiveness in online environments. The Library of Congress (LOC) has claimed the headings were not based on comprehensive principles nor ever intended to cover the universe of knowledge. Despite these claims and criticisms, LCSH is the most popular choice for subject access in digital libraries. Findings - The number of digital collections increases every year and LCSH is still the most popular choice of controlled vocabulary for subject access. Of the numerous criticisms, difficulties of use and user unfamiliarity are the greatest disadvantages of using LCSH for subject access. Average users only have a vague notion of what they are looking for when initializing a search. More work is required in automated generation of subject headings and increased usage of LCSH in faceted search retrieval systems. This will provide users with better access to the LCSH used in the back end of information retrieval. Originality/value - The Greek researchers who developed the Dissertation DSPace system believe this type of module will eventually replace the traditional keyword-based indexing back ends employed by many information retrieval modules within current digital library systems. The system offers the type of access and interactivity that will acquaint users with how LCSH looks and is used. Faceted search and automated pattern matching using an ontology based on LCSH have the best promise of overcoming the disadvantages that have always plagued the LOC-controlled vocabulary. These retrieval techniques give LCSH an opportunity to finally achieve the optimal precision and recall it has so far failed to deliver.
-
McJunkin, M.C.: Precision and recall in title keyword searching (1995)
0.02
0.017922562 = product of:
0.02688384 = sum of:
0.010616227 = weight(_text_:information in 3351) [ClassicSimilarity], result of:
0.010616227 = score(doc=3351,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.116372846 = fieldWeight in 3351, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=3351)
0.016267613 = product of:
0.032535225 = sum of:
0.032535225 = weight(_text_:systems in 3351) [ClassicSimilarity], result of:
0.032535225 = score(doc=3351,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.2037246 = fieldWeight in 3351, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.046875 = fieldNorm(doc=3351)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Investigates the extent to which title keywords convey subject content and compares the relative effectiveness of searching title keywords using 2 search strategies to examine whether adjacency operators in title keyword searches are effective in improving recall and precision of online searching. Title keywords from a random sample of titles in the field of economics were searched on FirstSearch, using the WorldCat database, which is equivalent in coverage to the OCLC OLUC, with and without adjacency of the keywords specified. The LCSH of the items retrieved were compared with the sample title subject headings to determine the degree of match or relevance and the values for precision and recall were calculated. Results indicated that, when keywords were discipline specific, adjacency operators improved precision with little degradation of recall. Systems that allow positional operators or rank output by proximity of terms may increase search success
- Source
- Information technology and libraries. 14(1995) no.3, S.161-171
-
Chen, H.; Yim, T.; Fye, D.: Automatic thesaurus generation for an electronic community system (1995)
0.01
0.014935466 = product of:
0.0224032 = sum of:
0.008846856 = weight(_text_:information in 2918) [ClassicSimilarity], result of:
0.008846856 = score(doc=2918,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.09697737 = fieldWeight in 2918, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0390625 = fieldNorm(doc=2918)
0.013556344 = product of:
0.027112689 = sum of:
0.027112689 = weight(_text_:systems in 2918) [ClassicSimilarity], result of:
0.027112689 = score(doc=2918,freq=2.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.1697705 = fieldWeight in 2918, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0390625 = fieldNorm(doc=2918)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Reports an algorithmic approach to the automatic generation of thesauri for electronic community systems. The techniques used included terms filtering, automatic indexing, and cluster analysis. The testbed for the research was the Worm Community System, which contains a comprehensive library of specialized community data and literature, currently in use by molecular biologists who study the nematode worm. The resulting worm thesaurus included 2709 researchers' names, 798 gene names, 20 experimental methods, and 4302 subject descriptors. On average, each term had about 90 weighted neighbouring terms indicating relevant concepts. The thesaurus was developed as an online search aide. Tests the worm thesaurus in an experiment with 6 worm researchers of varying degrees of expertise and background. The experiment showed that the thesaurus was an excellent 'memory jogging' device and that it supported learning and serendipitous browsing. Despite some occurrences of obvious noise, the system was useful in suggesting relevant concepts for the researchers' queries and it helped improve concept recall. With a simple browsing interface, an automatic thesaurus can become a useful tool for online search and can assist researchers in exploring and traversing a dynamic and complex electronic community system
- Source
- Journal of the American Society for Information Science. 46(1995) no.3, S.175-193
-
Gilchrist, A.: ¬The thesaurus in retrieval (1971)
0.01
0.011795808 = product of:
0.035387423 = sum of:
0.035387423 = weight(_text_:information in 4593) [ClassicSimilarity], result of:
0.035387423 = score(doc=4593,freq=8.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.38790947 = fieldWeight in 4593, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.078125 = fieldNorm(doc=4593)
0.33333334 = coord(1/3)
- LCSH
- Information retrieval
- RSWK
- Schlagwortnormdatei / Information Retrieval
- Subject
- Schlagwortnormdatei / Information Retrieval
Information retrieval
-
Lambert, N.: Of thesauri and computers : reflections on the need for thesauri (1995)
0.01
0.009387651 = product of:
0.028162954 = sum of:
0.028162954 = product of:
0.05632591 = sum of:
0.05632591 = weight(_text_:22 in 3734) [ClassicSimilarity], result of:
0.05632591 = score(doc=3734,freq=2.0), product of:
0.1819777 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051966466 = queryNorm
0.30952093 = fieldWeight in 3734, 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=3734)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Searcher. 3(1995) no.8, S.18-22
-
Lopes, M.I.: Principles underlying subject heading languages : an international approach (1996)
0.01
0.008946732 = product of:
0.026840193 = sum of:
0.026840193 = product of:
0.053680386 = sum of:
0.053680386 = weight(_text_:systems in 5608) [ClassicSimilarity], result of:
0.053680386 = score(doc=5608,freq=4.0), product of:
0.159702 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.051966466 = queryNorm
0.33612844 = fieldWeight in 5608, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.0546875 = fieldNorm(doc=5608)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Discusses the problems in establishing commonly accepted principles for subject retrieval between different bibliographic systems. The Working Group on Principles Underlying Subject Heading Languages was established to devise general principles for any subject retrieval system and to review existing real systems in the light of such principles and compare them in order to evaluate the extent of their coverage and their application in current practices. Provides a background and history of the Working Group. Discusses the principles underlying subject headings and their purposes and the state of the work and major findings
-
Bates, M.J.: Subject access in online catalogs: a design model (1986)
0.01
0.008257066 = product of:
0.024771197 = sum of:
0.024771197 = weight(_text_:information in 120) [ClassicSimilarity], result of:
0.024771197 = score(doc=120,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.27153665 = fieldWeight in 120, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.109375 = fieldNorm(doc=120)
0.33333334 = coord(1/3)
- Source
- Journal of the American Society for Information Science. 37(1986), S.357-367
-
Piternick, A.B.: Vocabularies for online subject searching (1990)
0.01
0.008257066 = product of:
0.024771197 = sum of:
0.024771197 = weight(_text_:information in 1330) [ClassicSimilarity], result of:
0.024771197 = score(doc=1330,freq=2.0), product of:
0.09122598 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.051966466 = queryNorm
0.27153665 = fieldWeight in 1330, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.109375 = fieldNorm(doc=1330)
0.33333334 = coord(1/3)
- Source
- Encyclopedia of library and information science. Vol.45, [=Suppl.10]
