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Abstract: visualization paper

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Abstract: Sorry no abstract available for this article

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Abstract: Sorry no abstract available for this article

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Abstract: In web data, telecommunications traffic and in epidemiological studies, dense subgraphs correspond to subsets of subjects (i.e. users, patients) that share a collection of attributes values (i.e. accessed web pages, email-calling patterns or disease diagnostic profiles). Visual and computational identification of these "clusters" becomes useful when domain experts desire to determine those factors of major influence in the formation of access and communication clusters or in the detection and contention of disease spread. With the current increases in graphic hardware capabilities and RAM sizes, it is more useful to relate graph sizes to the available screen real estate S and the amount of available RAM M, instead of the number of edges or nodes in the graph. We offer a visual interface that is parameterized by M and S and is particularly suited for navigation tasks that require the identification of subgraphs whose edge density is above certain threshold. This is achieved by providing a zoomable matrix view of the underlying data. This view is strongly coupled to a hierarchical view of the essential information elements present in the data domain. We illustrate the applicability of this work to the visual navigation of cancer incidence data and to an aggregated sample of phone call traffic.

 clustering;  graph visualization;  hierarchy trees;  external memory algorithms;  cancer data;  phone traffic;  

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Abstract: This paper presents an architecture for a direct manipulation user interface for browsing and querying geographic data. This interface provides users with a high level object oriented conceptual view of the underlying database independent of the databases native data model. It lets users manipulate different representations of a single georeferenced entity, thereby adding a new degree of flexibility to query facilites.

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