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    Touching The Invisible - Molecular Haptics
    (The Eurographics Association, 2009) Davies, R. Andrew; Maskery, James S.; John, Nigel W.; Wen Tang and John Collomosse
    Novel, simple, cost-effective applications combining haptics and computer graphics for the study of key chemical concepts such as reactivity and periodicity at AS/A-level and undergraduate level are described.
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    Simulation of X-ray Attenuation on the GPU
    (The Eurographics Association, 2009) Vidal, Franck; Garnier, Manuel; Freud, Nicolas; Létang, Jean Michel; John, Nigel W.; Wen Tang and John Collomosse
    In this paper, we propose to take advantage of computer graphics hardware to achieve an accelerated simulation of X-ray transmission imaging, and we compare results with a fast and robust software-only implementation. The running times of the GPU and CPU implementations are compared in different test cases. The results show that the GPU implementation with full floating point precision is faster by a factor of about 60 to 65 than the CPU implementation, without any significant loss of accuracy. The increase in performance achieved with GPU calculations opens up new perspectives. Notably, it paves the way for physically-realistic simulation of X-ray imaging in interactive time.