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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)
The Virtual Museum of the Pacific is a digital ecosystem implemented as Web 2.0 application that experiments with information and knowledge acquisition for a digital collection of museum artifacts from the Australian Museum. The Virtual Museum of the Pacific allows several search methods: attribute search based on a control vocabulary, query refinement and(More)
This paper discusses the implementation of Dijkstra's classic double bucket algorithm for path finding in connected networks. The work reports on a modification of the algorithm embracing both static and dynamic heuristic components and multiple source nodes. The modified algorithm is applied in a 3D Spatial Information System (SIS) for routing emergency(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)
This paper reports a novel semantic web application developed to deliver a collaborative tagging system for a digital on-line museum. The key features of our application -- called the Virtual Museum of the Pacific -- concern the browsing and retrieval interface based on Formal Concept Analysis the extensible distributed data model to support collaborative(More)
The paper argues for the use of general and intuitive knowledge representation languages (and simpler notational variants, e.g. subsets of natural languages) for indexing the content of Web documents and representing knowledge within them. We believe that these languages have advantages over metadata languages based on the Extensible Markup Language (XML).(More)