Chris J. Hughes

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If we were to have a Grid infrastructure for visualization, what technologies would be needed to build such an infrastructure, what kind of applications would benefit from it, and what challenges are we facing in order to accomplish this goal? In this report, we make use of the term 'visual supercomputing' to encapsulate a subject domain concerning the(More)
PURPOSE Commercial interventional radiology vascular simulators emulate instrument navigation and device deployment, though none supports the Seldinger technique, which provides initial access to the vascular tree. This paper presents a novel virtual environment for teaching this core skill. METHODS Our simulator combines two haptic devices: vessel(More)
The Internet has continued to evolve, becoming increasingly media rich. It is now a major platform for video content, which is available to a variety of users across a range of devices. Subtitles enhance this experience for many users. However, subtitling techniques are still based on early television systems, which impose limitations on font type, size and(More)
We present epSpread, an analysis and storyboarding tool for geo-located microblogging data. Individual time points and ranges are analysed through queries, heatmaps, word clouds and stream-graphs. The underlying narrative is shown on a storyboard-style timeline for discussion, refinement and presentation. The tool was used to analyse data from the VAST(More)
Recent hardware and software advances have demonstrated that it is now practicable to run large visual computing tasks over heterogeneous hardware with output on multiple types of display devices. As the complexity of the enabling infrastructure increases, then so too do the demands upon the programmer for task integration as well as the demands upon the(More)
Millions of people rely on subtitles when watching video content. The current change in media viewing behaviour involving computers has resulted in a large proportion of people turning to online sources as opposed to regular television for news information. This work analyses the user experience of viewing subtitled news videos presented as part of a web(More)
Transcranial Magnetic Stimulation (TMS) is the process in which electrical activity in the brain is influenced by a pulsed magnetic field. Common practice is to align an electromagnetic coil with points of interest identified on the surface of the brain, from an MRI scan of the subject. The coil can be tracked using optical sensors, enabling the targeting(More)
Within the limits of current technology, many applications of a virtual environment will trade-off accuracy for speed. This is not an acceptable compromise in a medical training application where both are essential. Efficient algorithms must therefore be developed. The purpose of this project is the development and validation of a novel physics-based real(More)