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Abstract

Traditionell werden Thesauren in Listen dargestellt, doch die Existenz von Software legt nahe, die Möglichkeiten moderner Informationsvisualisierung auszuschöpfen.Wolfram Sieber evaluiert, ob und wie Software zur Thesaurus-Visualisierung über die reine Listendarstellung hinausgeht. Besonderes Augenmerk richtet er darauf, wie gut dabei die Chancen der Visualisierung - Stichworte prä-/attentive Wahrnehmung und Change Blindness - genutzt werden, bzw. wie gegen sie verstoßen und der Nutzer dadurch in seiner Arbeit behindert wird.Zugunsten einer soliden Entscheidungsgrundlage hat Sieber eine detaillierte Liste von Prüfkriterien zusammengestellt und sieben verschiedene Thesaurus-Visualisierer daran gemessen. Diese Liste kann als Grundlage für weitergehende Evaluierungen verwendet werden, bietet sich aber vor allem als Richtschnur bei der Entwicklung eigener Thesaurus- und Graph-Visualisierer an. Anwendern und interessierten Laien hilft sie, zur Auswahl stehende Graph-Visualisierer aus fachlicher Sicht, wissenschaftlich abgesichert zu beurteilen. Dieses Werk richtet sich an Entscheider, Entwickler und Anwender aus Informationswissenschaft und -praxis, Informatik, Dokumentation.

Footnote

Basiert auf einer Diplomarbeit "Visualisierung von Thesaurus-Strukturen unter besonderer Berücksichtigung eines Hyperbolic Tree Views" an der FH Köln, Institut für Informationswissenschaft, Studiengang Informationswirtschaft, 2004.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

In this paper, we describe in detail the Information Content Evaluation Map (ICE-Map Visualization, formerly referred to as IC Difference Analysis). The ICE-Map Visualization is a visual data mining approach for all kinds of concept hierarchies that uses statistics about the concept usage to help a user in the evaluation and maintenance of the hierarchy. It consists of a statistical framework that employs the the notion of information content from information theory, as well as a visualization of the hierarchy and the result of the statistical analysis by means of a treemap.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

The use of thesaurus-based indexing is a common approach for increasing the performance of information retrieval. In this thesis, we examine the suitability of a thesaurus for a given set of information and evaluate improvements of existing thesauri to get better search results. On this area, we focus on two aspects: 1. We demonstrate an analysis of the indexing results achieved by an automatic document indexer and the involved thesaurus. 2. We propose a method for thesaurus evaluation which is based on a combination of statistical measures and appropriate visualization techniques that support the detection of potential problems in a thesaurus. In this chapter, we give an overview of the context of our work. Next, we briefly outline the basics of thesaurus-based information retrieval and describe the Collexis Engine that was used for our experiments. In Chapter 3, we describe two experiments in automatically indexing documents in the areas of medicine and economics with corresponding thesauri and compare the results to available manual annotations. Chapter 4 describes methods for assessing thesauri and visualizing the result in terms of a treemap. We depict examples of interesting observations supported by the method and show that we actually find critical problems. We conclude with a discussion of open questions and future research in Chapter 5.

Imprint

Mannheim : Fakultät für Mathematik und Informatik

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

Wenige Software-Werkzeuge zur Visualisierung von Thesaurus-Strukturen sind über das prototypische Stadium hinaus gelangt. Konkrete Implementationen entsprechender Anwendungen werden evaluiert. Aus den Gebieten Thesaurus-Entwicklung, Visualisierung, Interaktion, Informations- und Graphenvisualisierung werden Kriterien ermittelt, an denen die Implementierungen gemessen werden. Ein generisches Werkzeug zur Visualisierung dreidimensionaler hyperbolischer Bäume wird dazu verwendet, die Strukturen eines Thesaurus darzustellen. Dieses Werkzeug wird mit in die Evaluation einbezogen. Es hat sich gezeigt, dass die Visualisierung der Thesaurus-Strukturen auf Basis weniger unterschiedlicher Verfahren erfolgt. Der generische Visualisierer ist für Thesaurus-Strukturen prinzipiell geeignet, doch fehlen ihm spezifische Möglichkeiten der Domäne Thesaurus.

Footnote

Diplomarbeit Studiengang Informationswirtschaft, Fakultät für Informations- und Kommunikationswissenschaft Fachhochschule Köln

Imprint

Köln : Fachhochschule / Fakultät für Informations- und Kommunikationswissenschaft

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Konzeption und Anwendung des Prinzips Thesaurus