Literatur zur Informationserschließung

Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.

© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 28. April 2022)

Suchergebnisse

• 21
  Kämper, U. ; Wolff, C.: Kostenfreie Recherchen als Zeitfresser und mit höheren Kosten : Internet versus Hosts.
  In: Password. 1999, H.1, S.17.
  
  Abstract: Diskussion der kostenlosen Internet-Angebote von MEDLINE im Vergleich mit den gebührenpflichtigen Host-Angeboten
  
  Themenfeld: Internet ; Informationsmittel
  Wissenschaftsfach: Medizin
  Objekt: MEDLINE
  
  
• 22
  Lindsay, R.K. ; Gordon, M.D.: Literature-based discovery by lexical statistics.
  In: Journal of the American Society for Information Science. 50(1999) no.7, S.574-587.
  
  Abstract: We report experiments that use lexical statistics, such as word frequency counts, to discover hidden connections in the medical literature. Hidden connections are those that are unlikely to be found by examination of bibliographic citations or the use of standard indexing methods and yet establish a relationship between topics that might profitably by explored by scientific research. Our experiments were conducted with the MEDLINE medical literature database and follow and extend the work of Swanson
  
  Themenfeld: Informetrie
  Wissenschaftsfach: Medizin
  Objekt: Medline
  
  
• 23
  Humphrey, S.M.: Automatic indexing of documents from journal descriptors : a preliminary investigation.
  In: Journal of the American Society for Information Science. 50(1999) no.8, S.661-674.
  
  Abstract: A new, fully automated approach for indedexing documents is presented based on associating textwords in a training set of bibliographic citations with the indexing of journals. This journal-level indexing is in the form of a consistent, timely set of journal descriptors (JDs) indexing the individual journals themselves. This indexing is maintained in journal records in a serials authority database. The advantage of this novel approach is that the training set does not depend on previous manual indexing of thousands of documents (i.e., any such indexing already in the training set is not used), but rather the relatively small intellectual effort of indexing at the journal level, usually a matter of a few thousand unique journals for which retrospective indexing to maintain consistency and currency may be feasible. If successful, JD indexing would provide topical categorization of documents outside the training set, i.e., journal articles, monographs, Web documents, reports from the grey literature, etc., and therefore be applied in searching. Because JDs are quite general, corresponding to subject domains, their most problable use would be for improving or refining search results
  
  Themenfeld: Automatisches Indexieren
  Wissenschaftsfach: Medizin
  Objekt: Medline
  
  
• 24
  Swanson, D.R. ; Smalheiser, N.R.: Implicit text linkages between Medline records : using arrowsmith as an aid to scientific discovery.
  In: Library trends. 48(1999) no.1, S.48-59.
  
  Wissenschaftsfach: Medizin
  Objekt: Medline
  
  
• 25
  Katcher, B.S.: MEDLINE : a guide to effective searching.
  San Francisco : Ashbury Press, 1999. 149 S.
  ISBN 0-9673445-0-6
  
  Anmerkung: Rez. in: Government information quarterly 18(2001) S.143-153 (A. Mizikar)
  
  Objekt: MEDLINE
  
  
• 26
  Pfannenstiel, B.R.: "Famous persons" in MEDLINE : examination of a medical subject heading.
  In: Medical reference services quarterly. 17(1998) no.1, S.11-23.
  
  Abstract: Considers what sort of articles are indexed using the 'famous persons' MeSH and the unique perspective they give to the medical literature indexed in the MEDLINE database. Reports results of a study of 3.745 MEDLINE citations indexed with the term 'famous persons' from 1966 through 1994, noting discussions of possible diagnoses of creative artists, royalty, political leaders, and even fictional characters and assassinations. Notes that publication dates of articles concerning a particular famous person are often clustered around an anniversary of the person's birth or death. A few famous persons account for a disproportionate number of citations
  
  Objekt: Medline
  
  
• 27
  Brown, C.M.: Complementary use of the SciSearch database for improved biomedical information searching.
  In: Bulletin of the Medical Library Association. 86(1998) no.1, S.63-67.
  
  Abstract: The use of at least 2 complementary online biomedical databases are usually considered critical for biomedical scientists seeking to keep abreast of recent research developments as well as to retrieve the highest number of relevant citation as possible. Although the National Library of Medicine's (NLM) MEDLINE is usually the database of choice, this study illustrates the benefits of using another database, ISI's SciSearch, when conducting biomedical information searches. When a simple query about red wine consumption and coronary artery disease was posed simultaneously in both MEDLINE and SciSearch, on the same online platform (DIALOG) a greater number of relevant citations were retrieved through SciSearch. Provides suggestions for performing comprehensive literature searchs in a rapid and efficient manner by using SciSearch in conjunction with MEDLINE. Includes details of comparative costs of searching the 2 databases and demonstrates the cost effectiveness of the process, which includes the removal of duplicates
  
  Wissenschaftsfach: Medizin
  Objekt: SciSearch ; MEDLINE
  
  
• 28
  Bauer, B.: Zugriffsmöglichkeit auf MEDLINE für alle österreichischen Universitäten : Das medizinische ERL-Datennetz der Zentralbibliothek für Medizin in Wien.
  In: B.I.T.online. 1(1998) H.3, S.169-182.
  
  Abstract: Seit 1992 wurden an allen österreichischen Universitäts- und Zentralbibliotheken CD-ROM-Datennetze installiert. Zwischen den einzelnen Bibliotheken gab es bisher keine Kooperation im Betrieb der Datennetze bzw. beim Abschluß von Lizenzverträgen für Datenbanken. Im Mai 1998 wurde von der Zentralbibliothek für Medizin eine derartige Zusammenarbeit mit der Datenbank MEDLINE initiiert, die seither an allen österreichischen Universitäten genutzt werden kann
  
  Objekt: Medline
  
  
• 29
  Boynton, J.: Identifying systematic reviews in MEDLINE : developing an objective approach to search strategy design.
  In: Journal of information science. 24(1998) no.3, S.137-154.
  
  Abstract: Systematic reviews are becoming increasingly important for health care professionals seeking to provide evidence based health care. In the past, systematic reviews have been difficult to identify among the mass of literature labelled 'reviews'. Reports results of a study to design search strategies based on a more objective approach to strategy construction. MEDLINE was chosen as the database and word frequencies in the titles, abstracts and subject keywords of a collection of systematic reviews of the effective health care interventions were analyzed to derive a highly sensitive search strategy. 'Sensitivity' was used in preference to the usual term 'recall' as one of the measures (in addition to the usual 'precision'). The proposed strategy was found to offer 98% sensitivity in retrieving systematic reviews, while retaining a low but acceptable level of precision (20%). Reports results using other strategies with other levels of sensitivity and precision. Concludes that it is possible to use frequency analysis to generate highly sensitive strategies when retrieving systematic reviews
  
  Themenfeld: Suchtaktik
  Objekt: MEDLINE
  
  
• 30
  Jacobs, M.: Criteria for evaluating alternative MEDLINE search engines.
  In: Medical reference services quarterly. 17(1998) no.3, S.1-12.
  
  Abstract: Reports results of a study, undertaken at the J. Otto Lottes Health Sciences Library, Missouri University at Columbia, to derive a set of evaluation criteria to assist librarians in determining the positive and negative aspects of alternative Web sites available for searching MEDLINE via the WWW. A set of searches were used systematically to compare MEDLINE Web sites, including: Avicenna; America Online; HealthGate; PubMed; Medscape; and Physicians' Online. Focuses on the principle features of the search engines used in the sites: default fields and operators; MeSH; subheadings; stopwords protected in MeSH; truncation and stemming. Describes the group processes used to arrive at the evaluation criteria and some general conclusions which will help librarians in directing their users to a particular MEDLINE site
  
  Themenfeld: Suchmaschinen ; Informationsmittel
  Wissenschaftsfach: Medizin
  Objekt: MEDLINE
  
  
• 31
  Hallet, K.S.: Separate but equal? : A system comparison study of MEDLINE's controlled vocabulary MeSH.
  In: Bulletin of the Medical Library Association. 86(1998) no.4, S.491-495.
  
  Abstract: Reports results of a study to test the effect of controlled vocabulary search feature implementation on 2 online systems. Specifically, the study examined retrieval rates using 4 unique controlled vocabulary search features (Explode, major descriptor, descriptor, subheadings). 2 questions were addressed; what, if any, are the general differences between controlled vocabulary system implementations in DIALOG and Ovid; and what, if any are the impacts of each on the differing controlled vocabulary search features upon retrieval rates? Each search feature was applied to to 9 search queries obtained from a medical reference librarian. The same queires were searched in the complete MEDLINE file on the DIALOG and Ovid online host systems. The unique records (those records retrieved in only 1 of the 2 systems) were identified and analyzed. DIALOG produced equal or more records than Ovid in nearly 20% of the queries. Concludes than users need to be aware of system specific designs that may require differing input strategies across different systems for the same unique controlled vocabulary search features. Making recommendations and suggestions for future research
  
  Themenfeld: Retrievalstudien
  Wissenschaftsfach: Medizin
  Objekt: MeSH ; Medline ; Ovid
  
  
• 32
  Notess, G.R.: Free MEDLINEs on the Web.
  In: Database. 21(1998) no.3, S.71-74.
  
  Abstract: Compares the free versions of the health sciences abstarct database MEDLINE, available through the WWW. Compares: database coverage, registration requirements, advanced searching capabilities, document delivery options, follow-up searching and sorting. Covers: Avicenna (www.avicenna.com); BioMedNet (biomednet.com); and HealthGate (www.healthgate.com). The following are also discussed: Infotrieve, Medscape, Inernet Grateful Med and PubMed
  
  Themenfeld: Internet ; Informationsmittel
  Wissenschaftsfach: Medizin
  Objekt: Medline
  
  
• 33
  Booth, A. ; O'Rouke, A.J.: ¬The value of structured abstracts in information retrieval from MEDLINE.
  In: Health libraries review. 14(1997) no.3, S.157-166.
  
  Abstract: Presents a structured abstract of the actual article. Outlines the debate on the value of structured abstracts and describes a research project into their use, which investigated records of cardiovascular disease downloaded from MEDLINE and tested against clinical questions derived from a survey of CD-ROM use in 3 health science libraries. It was found that structured abstracts improve precision at the expense of recall and place heavier demands on the skills of selecting fields to search within the abstract. Indicates directions for further research
  
  Themenfeld: Referieren
  Objekt: MEDLINE
  
  
• 34
  Marshall, L.: ¬The MEDLINE database : more accessible, convenient, and dangerous!.
  In: Business information alert. 9(1997) no.8, S.1,3-4.
  
  Abstract: There are 12 free MEDLINE sites on the WWW. Looks at their differences. Covers: aims of the Producers, content, user interface, output and help. Some of the sites are totally inadequate but others are axcellent. Future developments are expected and they will impact on the fee-based services
  
  Themenfeld: Informationsmittel ; Internet
  Objekt: MEDLINE
  
  
• 35
  Buntrock, R.E.: MEDLINE on the Internet : "healthier" than before?.
  In: Searcher. 5(1997) no.9, S.32-36.
  
  Abstract: Questions whether the public's medical knowledge will be increased by improving end user access to Medline through the Internet. Evaluates the new service PubMed and the Internet Grateful Med (IGM) service which was made free in June 1997. Describes sample searches carried out on PubMed. Outlines 2 non-National Library of Medicine Web Medicine sites: IntelliHealth (http://www.intellihealth.com/ih/ihtHome) and BioMedNet (http://biomednet.com.db/medline)
  
  Themenfeld: Internet
  Wissenschaftsfach: Medizin
  Objekt: MEDLINE
  
  
• 36
  Srinivasan, P.: Query expansion and MEDLINE.
  In: Information processing and management. 32(1996) no.4, S.431-443.
  
  Abstract: Evaluates the retrieval effectiveness of query expansion strategies on a test collection of the medical database MEDLINE using Cornell University's SMART retrieval system. Tests 3 expansion strategies for their ability to identify appropriate MeSH terms for user queries. Compares retrieval effectiveness using the original unexpanded and the alternative expanded user queries on a collection of 75 queries and 2.334 Medline citations. Recommends query expansions using retrieval feedback for adding MeSH search terms to a user's initial query
  
  Themenfeld: Retrievalalgorithmen ; Semantisches Umfeld in Indexierung u. Retrieval
  Objekt: MEDLINE ; SMART
  
  
• 37
  Srinivasan, P.: Optimal document-indexing vocabulary for MEDLINE.
  In: Information processing and management. 32(1996) no.5, S.503-514.
  
  Abstract: The indexing vocabulary is an important determinant of success in text retrieval. Researchers have compared the effectiveness of indexing using free text and controlled vocabularies in a variety of text contexts. A number of studies have investigated the relative merits of free-text, MeSH and UMLS metathesaurus indexing vocabularies for MEDLINE document indexing. Controlled vocabularies offer no advantages in retrieval performance over free text. Offers a detailed analysis of prior results and their underlying experimental designs. Offers results from a new experiment assessing 8 different retrieval strategies. Results indicate that MeSH does have an important role in text retrieval
  
  Themenfeld: Retrievalstudien
  Objekt: MEDLINE ; MeSH ; UMLS
  
  
• 38
  Schoonbaert, D.: SPIRS, WinSPIRS, and OVID : a comparison of three MEDLINE-on-CD-ROM interfaces.
  In: Bulletin of the Medical Library Association. 84(1996) no.1, S.63-70.
  
  Abstract: Reports results of a study to compare 3 CD-ROM interfaces working on MEDLINE databases: SPIRS (ver. 3.11) and WinSPIRS (ver. 1.0) from SilverPlatter and OVID (ver. 3.0, DOS and WINDOWS interfaces) from CD Plus Technologies (now OVID Technologies). Though the database is the same, there are substantial differences between the interfaces in the way the data is presented and can be searched. Discusses these different approaches and includes a detailed comparative table. Concludes that all 3 interfaces are good yet none of them is perfect; each has desirable and unfortunate features. Together, they offer an enormous range of possibilities. Users would benefit if most of the better features listed (such as easy menu, free text retrieval, pre exploded thesaurus terms) were implemented in future versions of these interfaces and if system operators were given greater latitude to determine the system defaults appropriate to their specific situations and customers. A full, comparative table of features are presented for SPIRS, WinSPIRS, OVID(DOS) and OVID(Windows)
  
  Themenfeld: Suchoberflächen
  Objekt: SPIRS ; WinSPIRS ; OVID ; Medline
  
  
• 39
  Harbourt, A.M. ; Knecht, L.S.: Structured abstracts in MEDLINE, 1989-1991.
  In: Bulletin of the Medical LIbrary Association. 83(1995) no.2, S.190-195.
  
  Abstract: Reports results of a study of the structured abstracts in biomedical periodicals indexed in MEDLINE, over a 3 year period, as an initial step in exploring their utility in enhancing bibliographic information retrieval of online databases
  
  Wissenschaftsfach: Medizin
  Objekt: MEDLINE
  
  
• 40
  Medline on CD-ROM.
  In: Online and CD notes. 1995, S.5.
  
  Abstract: Medline is the computer searchable version of the US National Library of Medicine's Index Medicus and has evolved from the Medlars project of the mid 1960s. Medline files can be subdivided into 3 major groups: Full Medline, Short Medline and Specialist Medline. A small number of products are targeted more individual end users rather than the normal library/information service market. Search software is now largely concentrated on Dialog OnDisc, BRS Search and SilverPlatter's SPIRS software
  
  Objekt: Medline