Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
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1Mettrop, W. ; Nieuwenhuysen, P.: Internet search engines : fluctuations in document accessibility.
In: Journal of documentation. 57(2001) no.5, S.623-651.
Abstract: An empirical investigation of the consistency of retrieval through Internet search engines is reported. Thirteen engines are evaluated: AltaVista, EuroFerret, Excite, HotBot, InfoSeek, Lycos, MSN, NorthernLight, Snap, WebCrawler and three national Dutch engines: Ilse, Search.nl and Vindex. The focus is on a characteristics related to size: the degree of consistency to which an engine retrieves documents. Does an engine always present the same relevant documents that are, or were, available in its databases? We observed and identified three types of fluctuations in the result sets of several kinds of searches, many of them significant. These should be taken into account by users who apply an Internet search engine, for instance to retrieve as many relevant documents as possible, or to retrieve a document that was already found in a previous search, or to perform scientometric/bibliometric measurements. The fluctuations should also be considered as a complication of other research on the behaviour and performance of Internet search engines. In conclusion: in view of the increasing importance of the Internet as a publication/communication medium, the fluctuations in the result sets of Internet search engines can no longer be neglected.
Anmerkung: Vgl. auch: http://www.emeraldinsight.com/10.1108/EUM0000000007096.
Themenfeld: Suchmaschinen ; Retrievalstudien
Objekt: AltaVista ; EuroFerret ; Excite ; HotBot ; InfoSeek ; Lycos ; MSN ; NorthernLight ; Snap ; WebCrawler ; Ilse ; Search.nl ; Vindex
2Laan, H. van der ; Mettrop, W.: Werkgroep IRT (1) : search engines aan de tand gevoeld.
In: Informatie professional. 2(1998) nos.7/8, S.32-34.
Abstract: 1st in a series or reports by the IRT (Internet Retrieval Tools) Working Party in the Netherlands. The group was formed at the start of 1997 to attempt to identify which search engines were most suitable for different ypes of enquiries. Compilers of search engines frequently give little information about the data covered by their service and how their service deals with metadata. Preliminary tests show considerable variations in approach; future tests will examine the use of ranking and currency of systems
Anmerkung: Übers. d. Titels: The IRT Working Party (1): search engines on the test bench