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Welcome to the proceedings of the Pacific Visualization Symposium 2012 (PacificVis 2012) at CEWIT Korea in Songdo, Korea, from February 28th to March 2nd, 2012. After a series of successful events in Kyoto (2008), Beijing (2009), Taipei (2010), and Hong Kong (2011), this meeting in Songdo is the fifth Pacific Visualization Symposium sponsored by the IEEE Computer Society Visualization and Graphics...
The remarkable adoption of information visualization has triggered worldwide application from researchers, companies, governments, and news media. The public interest in visually rich infographics has raised questions of how best to present insights and what interactive capabilities enable engaging exploration, while maintaining comprehensibility. Government professionals find that compelling visual...
Discoveries in computational molecular - cell biology and bioinformatics promise to provide new therapeutic interventions to disease. With the rapid growth of sequence and structural information for thousands of proteins and hundreds of cell types, computational processing are a restricting factor in obtaining quantitative understanding of molecular-cellular function. Processing and analysis is necessary...
We propose the notion of composite visualization views (CVVs) as a theoretical model that unifies the existing coordinated multiple views (CMV) paradigm with other strategies for combining visual representations in the same geometrical space. We identify five such strategies—called CVV design patterns—based on an extensive review of the literature in composite visualization. We go on to show how these...
We demonstrate the application of topological analysis techniques to the rather unexpected domain of software visualization. We collect a memory reference trace from a running program, recasting the linear flow of trace records as a high-dimensional point cloud in a metric space. We use topological persistence to automatically detect significant circular structures in the point cloud, which represent...
The navigation of high-dimensional data spaces remains challenging, making multivariate data exploration difficult. To be effective and appealing for mainstream application, navigation should use paradigms and metaphors that users are already familiar with. One such intuitive navigation paradigm is interactive route planning on a connected network. We have employed such an interface and have paired...
Progressive refinement is a methodology that makes it possible to elegantly integrate scalable data compression, access, and presentation into one approach. Specifically, this paper concerns the effective use of progressive parallel coordinates (PPCs), utilized routinely for high-dimensional data visualization. It discusses how the power of the typical stages of progressive data visualization can...
We describe a practical approach for visualizing multiple relationships defined on the same dataset using a geographic map metaphor, where clusters of nodes form countries and neighboring countries correspond to nearby clusters. Our aim is to provide a visualization that allows us to compare two or more such maps (showing an evolving dynamic process, or obtained using different relationships). In...
Analyzing message streams from social blogging services such as Twitter is a challenging task because of the vast number of documents that are produced daily. At the same time, the availability of geolocated, realtime, and manually created status updates are an invaluable data source for situational awareness scenarios. In this work we present an approach that allows for an interactive analysis of...
The formation of cosmic structure results from the action of gravity on matter in an expanding Universe. As the evolution proceeds, the velocity field changes from being single-valued almost everywhere in space to being multi-valued over a complex web of ‘multistreaming’ regions associated with the formation of large-scale structure (LSS) such as halos (or clumps), filaments, and sheets. Until recently,...
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