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This paper presents a Java-based hyperbolic-style browser designed to render RDF files as structured ontological maps. The program was motivated by the need to browse the content of a web-accessible ontology server: WEBKB-2. The ontology server contains descriptions of over 74,500 object types derived from the WORDNET 1.7 lexical database and can be(More)
This paper introduces ImageSleuth, a tool for browsing and searching annotated collections of images. It combines the methods of Formal Concept Analysis (FCA) for information retrieval with the graph-ical information conveyed in thumbnails. In order to use thumbnails of images to represent concept extents, line diagrams can not be efficiently utilised and(More)
This paper surveys public domain supervised machine learning algorithms and performs accuracy (error rate) analysis of their classiication performance on unseen instances for twenty-nine of the University California Irvine machine learning datasets. The learning algorithms represent three types of classiier: decision trees, neural networks and rule-based(More)
SearchSleuth is a program developed to experiment with the automated local analysis of Web search using formal concept analysis. SearchSleuth extends a standard search interface to include a conceptual neighborhood centered on a formal concept derived from the initial query. This neighborhood of the concept derived from the search terms is decorated with(More)
We discuss an approach to change detection in digital remotely sensed imagery that relies on the Fuzzy Post Classification Comparison technique. We use the fuzzy ¡-means classifier together with the Mahalanobis distance as the basis for a metric of class membership for a individual pixel. We note that the value of the fuzzy exponent ¢ in a fuzzy classifier(More)
Formal Concept Analysis (FCA) has typically been applied in the field of software engineering to support software maintenance and object-oriented class identification tasks. This paper presents a broader overview by describing and classifying academic papers that report the application of FCA to software engineering. The papers are classified using a(More)
Mail-Sleuth is a personal productivity tool that allows individuals to manage email and visualize its contents using line diagrams. Based on earlier work on the Conceptual Email Manager (Cem), a major hypothesis of Mail-Sleuth is that novices to Formal Concept Analysis can read a lattice diagram. Since there is no empirical evidence for this in the Formal(More)