Garry Beirne

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A basic tenet of "Ubiquitous computing" (Weiser, 1993 [13]) is that technology should be distributed in the environment (ubiquitous), yet invisible, or transparent. In practice, resolving the seeming paradox arising from the joint demands of ubiquity and transparency is less than simple. This paper documents a case study of attempting to do just that. We(More)
Selective-area epitaxy is used to form three-dimensional (3D) GaN structures providing semipolar crystal facets. On full 2-in. sapphire wafers we demonstrate the realization of excellent semipolar material quality by introducing inverse GaN pyramids. When depositing InGaN quantum wells on such a surface, the specific geometry influences thickness and(More)
63 adult patients with advanced renal failure were interviewed to evaluate their exposure to chronically contacted or inhaled toxic substances. Grading of exposure revealed that patients with biopsy-proven primary proliferative glomerulonephritis and patients with a clinical presentation consistent with glomerulonephritis had significantly greater exposure(More)
rooms — these are just some of the abstractions that the research community have evolved for computer-mediated video communications. Each abstraction implies a particular context for communication, supported by an appropriate User Interface design and set of multimedia services. The success of public telephone services owes much to the simple but powerful(More)
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