Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
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21Albus, W. ; Smulders, H.: Doeltreffend zoeken in volledige teksten : 1. full-text retrieval bij de HavenInformatieBank.
In: Informatie professional. 2(1998) no.2, S.17-21.
Abstract: At Rotterdam Ports Authority in the Netherlands the Habour information database includes a press cuttings service and various online databases. To enable research staff to have direct access to information the POINT (Point Information Net) was begun in 1993. Using Verity software POINT provides simultaneously full text searching on a range of databases. The software uses current Web indexing technqiues to overcome the problems of excessive recall and low precision. A key element is the system's ability to recognise word combinations
Anmerkung: Übers. d. Titels: Effective searching on full texts: 1. full-text-retrieval on the Harbour information database
22Muddamalle, M.R.: Natural language versus controlled vocabulary in information retrieval : a case study in soil mechanics.
In: Journal of the American Society for Information Science. 49(1998) no.10, S.881-887.
Abstract: The effectiveness ot two information retrieval tools, namely, thesaurus and natural language, in an information retrieval system has been studies. A database SOILSC was created using a HP3000/58 series minicomputer and MINISIS software. Records of articles totalling 17.918 published in various journals, received in the Central Water and Power Research Station (CWPRS) library (Pune, India) since 1988, have been stored. The information needs of a soil mechanics group have been formulated using thesaurus and natural language into 81 search strategies. In consultation with the user, relevance of the retrieved documents was assessed and, recall (R) and precision (P) values were calculated. Since both thesaurus and natural language have shown identical performance in information retrieval, a combination of these two have been suggested for making searches and providing relevant information
23Hane, P.J.: AOL acquires Personal Library Software.
In: Information today. 15(1998) no.3, S.7,62.
Abstract: In Jan 1997 AOL annouced its acquisition of Personal Library Software, a leading developer of information indexing and search technologies, which are at the core of online a CD-ROM products from major providers such as Dow Jones and Knight Ridder. AOL is the world's leading Internet online service. Quotes the company heads concerning the advantages of the deal for searchers but reports that no specific details of its terms have been released. Outlines the history of the companies focusing on the role of Matthew Koll founder of Personal Library Software and now joining AOL and the reactions of information professionals
Objekt: AOL ; Personal Library Software
24Albus, W. ; Smulders, H.: Doeltreffend zoeken in volledige teksten : 2. full-text retrieval bij de HavenInformatieBank.
In: Informatie professional. 2(1998) no.3, S.28-33.
Abstract: At Rotterdam Port Authority an information database has been created with approx. 100.000 full text documents online. Topic software has been used to identify word groups and refine search strategies to optimize precision and recall. The software guides users from selected terms to other relevant word combinations. Although the system would benefit from further refinement, users are generally satisfied. The database includes a number of foreign language documents but lacks a thesaurus of foreign terms
Anmerkung: Übers. d. Titels: Effective searching on full texts: 1. full-text-retrieval on the Harbour information database
Objekt: Verity ; Topic
25Falk, H.: Document file searching.
In: Electronic library. 16(1998) no.3, S.199-203.
Abstract: Considers the importance of generating indexes when creating large document files, to facilitate searching, and evaluates 4 commercial document file index creation and searching software packages: QuickFind; Sonar; ZyIndex; and FastFind
Themenfeld: Dokumentenmanagement ; Volltextretrieval ; Suchmaschinen
Objekt: ZyIndex ; QuickFind ; Sonar ; FindFast
27Preston, L.A. ; Ebbs, C.M. ; Luther, J.: 'Full text' access evaluation : are we getting the real thing?.
In: Serials librarian. 34(1998) nos.3/4, S.301-305.
Abstract: Examines the comparative value of full text access and journal subscription through a sampling of journal issues available online from the Information Access Corporation and in print at James Madison University in Virginia. Presents a model for assessing the value of full text online subscriptions which can be used to evaluate journal subscription, back file retention, document delivery options, index selection, and online access
Anmerkung: Part of an issue devoted to 'Experimentation and collaboration: creating series for a new millenium', part 2, Proceedings of the North American Serials Interest Group, Inc.'s 12th annual conference, 29 May - 1 June 1997, University of Michigan Ann Arbor, Michigan
28Shewale, N.G.: Information delivery of full-text databases in academic and research libraries using hypermedia.
In: Information management in academic and research libraries: Proceedings of the 5th National convention for Automation of Libraries in Education and Research (CALIBER-98), Bhubaneswar, India, 4-5 March 1998. Ed. by M. Mahapatra et al. Ahmedabad : INFLIBNET Centre, 1998. S.79-86.
Abstract: Discusses the introduction of hypermedia in information delivery and its advantages. Describes the special features in the design of full text databases and steps in developing in-house hypermedia databases. It may not be the job of the library professionals to design and develop the hypermedia system for information retrieval, but their ideas and experience will play an important role
Anmerkung: Paper presented at the 5th National Convention for Automation of Libraries in Education and Research (CALIBER-98), at Bhubaneswar, 4-5 March 1998
Themenfeld: Volltextretrieval ; Hypertext
29Huang, Y.-L.: ¬A theoretic and empirical research of cluster indexing for Mandarine Chinese full text document.
In: Bulletin of library and information science. 1998, no.24, S.44-68.
Abstract: Since most popular commercialized systems for full text retrieval are designed with full text scaning and Boolean logic query mode, these systems use an oversimplified relationship between the indexing form and the content of document. Reports the use of Singular Value Decomposition (SVD) to develop a Cluster Indexing Model (CIM) based on a Vector Space Model (VSM) in orer to explore the index theory of cluster indexing for chinese full text documents. From a series of experiments, it was found that the indexing performance of CIM is better than traditional VSM, and has almost equivalent effectiveness of the authority control of index terms
Anmerkung: In Chinesisch
Themenfeld: Automatisches Klassifizieren ; Volltextretrieval
30Voorbij, H.: Title keywords and subject descriptors : a comparison of subject search entries of books in the humanities and social sciences.
In: Journal of documentation. 54(1998) no.4, S.466-476.
Abstract: In order to compare the value of subject descriptors and title keywords as entries to subject searches, two studies were carried out. Both studies concentrated on monographs in the humanities and social sciences, held by the online public access catalogue of the National Library of the Netherlands. In the first study, a comparison was made by subject librarians between the subject descriptors and the title keywords of 475 records. They could express their opinion on a scale from 1 (descriptor is exactly or almost the same as word in title) to 7 (descriptor does not appear in title at all). It was concluded that 37 per cent of the records are considerably enhanced by a subject descriptor, and 49 per cent slightly or considerably enhanced. In the second study, subject librarians performed subject searches using title keywords and subject descriptors on the same topic. The relative recall amounted to 48 per cent and 86 per cent respectively. Failure analysis revealed the reasons why so many records that were found by subject descriptors were not found by title keywords. First, although completely meaningless titles hardly ever appear, the title of a publication does not always offer sufficient clues for title keyword searching. In those cases, descriptors may enhance the record of a publication. A second and even more important task of subject descriptors is controlling the vocabulary. Many relevant titles cannot be retrieved by title keyword searching because of the wide diversity of ways of expressing a topic. Descriptors take away the burden of vocabulary control from the user.
Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/EUM0000000007178 .
Themenfeld: Retrievalstudien ; Volltextretrieval
Wissenschaftsfach: Geisteswissenschaften ; Sozialwissenschaften
33Blake, P.: Leading edge : Verity keeps it in the family.
In: Information world review. 1997, no.122, S.15-16.
Abstract: Verity Search 97 software will index and search e-mail, attachments, folders and documents on local and network disk drives. The Internet may be searched via the same front end and changes to particular documents or pages may be monitored. Documents may be viewed in their native formats including ASCII, HTML, PDF and popular word processors, with highlighted search terms. Agents may be launched into the Internet to retrieve information according to a user-specified profile. The software can index about 700 MB an hour. Describes the search technology which includes fuzzy logic and natural language. The Web version of Personal Search 97 works with Netscape Navigator or Microsoft Internet Explorer, while the Exchange version will work regardless of any attachment to an Exchange server. Search 97 Personal improves online time and access time and allows searches to be refined offline
Anmerkung: Vgl.: http://www.verity.com
Themenfeld: Internet ; Volltextretrieval
34Paijmans, H.: Gravity wells of meaning : detecting information rich passages in scientific texts.
In: Journal of documentation. 53(1997) no.5, S.520-536.
Abstract: Presents research in which 4 term weigthing schemes were used to detect information rich passages in texts and the results compared. Demonstrates that word categories and frequency derived weights have a close correlation but that weighting according to the first mention theory or the cue method shows no correlation with frequency based weights
Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/EUM0000000007209.
35Dow Jones unveils knowledge indexing system.
In: Advanced technology libraries. 26(1997) no.5, S.2-3.
Abstract: Dow Jones Interactive Publishing has developed a sophisticated automatic knowledge indexing system that will allow searchers of the Dow Jones News / Retrieval service to get highly targeted results from a search in the service's Publications Library. Instead of relying on a thesaurus of company names, the new system uses a combination of that basic algorithm plus unique rules based on the editorial styles of individual publications in the Library. Dow Jones have also announced its acceptance of the definitions of 'selected full text' and 'full text' from Bibliodata's Fulltext Sources Online directory
Themenfeld: Automatisches Indexieren ; Volltextretrieval
36Witt, M.: Au sujet des mots-clés.
In: Bulletin d'informations de l'Association des Bibliothecaires Francais. 1997, no.176, S.121-123.
Abstract: Information research using keywords is largely ignored by readers but in medium sized libraries such as that of the City of Science and Industry (Paris), with a multimedia collection of some 200.000 documents, it is the most effective tool. The reader, however, needs guidance in using this technique, and in refining searches to reduce noise. Examples are given demonstrating how keyword searches can identify non-indexed material, documents in other languages, and collective authors
Anmerkung: Übers. des Titels: On the subject of keywords
In: Journal of the American Society for Information Science. 47(1996) no.4, S.261-330.
Abstract: A special section devoted to full text information retrieval
38Pearce, C. ; Nicholas, C.: TELLTALE: Experiments in a dynamic hypertext environment for degraded and multilingual data.
In: Journal of the American Society for Information Science. 47(1996) no.4, S.263-275.
Abstract: Methods and tools for finding documents relevant to a user's needs in a document corpora can be found in the information retrieval, library science, and hypertext communities. Typically, these systems provide retrieval capabilities for fairly static copora, their algorithms are dependent on the language for which they are written, e.g. English, and they do not perform well when presented with misspelled words or text that has been degraded by OCR techniques. In this article, we present experimentation results for the TELLTALE system. TELLTALE is a dynamic hypertext environment that provides full-text search from a hypertext-style user interface for text corpora that may be garbled by OCR or transmission errors, and that may contain languages other than English. TELLTALE uses several techniques based on n-grams (n character sequences of text). With these results we show that the dynamic linkage mechanisms in TELLTALE are tolerant of garbles in up to 30% of the characters in the body of the texts
Themenfeld: Volltextretrieval ; Multilinguale Probleme
Objekt: TELLTALE ; OCR
40Nahl, D. ; Tenopir, C.: Affective and cognitive searching behavior of novice end-users of a full-text database.
In: Journal of the American Society for Information Science. 47(1996) no.4, S.276-286.
Anmerkung: Novice end users were given 2 hours of training in searching a full-text magazine database (Magazine ASAP(TM)) on DIALOG. Subjects searched during 3 to 4 sessions in the presence of a trained monitor who prompted them to think aloud throughout the sessions. qualitative analysis of the transcripts and transaction logs yielded empirical information on user variables (purpose, motivation, satisfaction), uses of the database, move types, and every question users asked during the searches. The spontaneous, naturalistic questions were categorized according to affective, cognitive, and sensorimotor speech acts. Results show that most of the searches were performed for the self and were work related. The most common use of the database was to retrieve full-text articles online and to download and print them out rather than read them on screen. The majority of searches were judged satisfactory. Innovative uses included browsing for background information and obtaining contextualized sentences for language teaching. Searchers made twice as many moves to limit sets as moves to expand sets. Affective questions outnumbered cognitive and sensorimotor questions by two to one. This preponderance of affective micro-information needs during searching might be addressed by new system functions
Themenfeld: Volltextretrieval ; Benutzerstudien