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Pfeffer, M.: Automatische Vergabe von RVK-Notationen mittels fallbasiertem Schließen (2009)
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- Date
- 22. 8.2009 19:51:28
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Eckert, K.; Pfeffer, M.; Stuckenschmidt, H.: Assessing thesaurus-based annotations for semantic search applications (2008)
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- Abstract
- Statistical methods for automated document indexing are becoming an alternative to the manual assignment of keywords. We argue that the quality of the thesaurus used as a basis for indexing in regard to its ability to adequately cover the contents to be indexed and as a basis for the specific indexing method used is of crucial importance in automatic indexing. We present an interactive tool for thesaurus evaluation that is based on a combination of statistical measures and appropriate visualisation techniques that supports the detection of potential problems in a thesaurus. We describe the methods used and show that the tool supports the detection and correction of errors, leading to a better indexing result.
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Pfeffer, M.; Eckert, K.; Stuckenschmidt, H.: Visual analysis of classification systems and library collections (2008)
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- Abstract
- In this demonstration we present a visual analysis approach that addresses both developers and users of hierarchical classification systems. The approach supports an intuitive understanding of the structure and current use in relation to a specific collection. We will also demonstrate its application for the development and management of library collections.
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- a
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Pfeffer, M.: Using clustering across union catalogues to enrich entries with indexing information (2014)
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- Abstract
- The federal system in Germany has created a segmented library landscape. Instead of a central entity responsible for cataloguing and indexing, regional library unions share the workload cooperatively among their members. One result of this approach is limited sharing of cataloguing and indexing information across union catalogues as well as heterogeneous indexing of items with almost equivalent content: different editions of the same work. In this paper, a method for clustering entries in library catalogues is proposed that can be used to reduce this heterogeneity as well as share indexing information across catalogue boundaries. In two experiments, the method is applied to several union catalogues and the results show that a surprisingly large number of previously not indexed entries can be enriched with indexing information. The quality of the indexing has been positively evaluated by human professionals and the results have already been imported into the production catalogues of two library unions.
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Pfeffer, M.; Wiesenmüller, H.: Resource Discovery Systeme (2016)
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Wiesenmüller, H.; Maylein, L.; Pfeffer, M.: Mehr aus der Schlagwortnormdatei herausholen : Implementierung einer geographischen Facette in den Online-Katalogen der UB Heidelberg und der UB Mannheim (2011)
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Wiesenmüller, H.; Pfeffer, M.: Abgleichen, anreichern, verknüpfen : das Clustering-Verfahren - eine neue Möglichkeit für die Analyse und Verbesserung von Katalogdaten (2013)
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Pfeffer, M.; Schöllhorn, K.: Praktische Nutzung von Klassifikationssystemen (2018)
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Hänger, C.; Kaldenberg, B.; Pfeffer, M.: Präsentation von E-Books mit Primo (2010)
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