Ian Kelly

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We describe the first prototypes of an inter-robot infrared localisation and communication system that exploits standard of-the-shelf RF components and uses time division multiplexing of a single carrier frequency. The system detects the relative positions (both range and bearing) of autonomous mobile robots with an update rate of up to 20Hz, a range of up(More)
A key aspect of the autonomy of living things is their ability to find and use sources of energy in the natural environment. Clearly, any comprehensive attempt at producing artificial life should demonstrate an equivalent capability; equally clearly, so should any truly autonomous robot. To date, both Alife agent simulations and robotic implementations have(More)
One of the key aspects of most living organisms is their ability to detect and exploit natural sources of energy within their environment. We are currently developing a robotic predator system that will attempt to sustain itself by hunting and catching slugs on agricultural land. A microbial fuel cell will be used to convert the slug bio-mass to electricity(More)
With a few exceptions, today's mobile robots, however complex, are not truly autonomous. At some time, they all require humans to supply them with energy and/or information; most also require other forms of assistance. In complete contrast, even the simplest animals are totally self-sufficient. We describe a current project 1 which aims to construct(More)
(2006) DNA evidence and police investigations: a health warning. Users may access full items free of charge; copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational or not­for­profit purposes without prior permission or charge, provided: •(More)
INTRODUCTION Fracture of stems in primary total hip arthroplasty is a known complication and has been attributed to varus positioning, excessive weight of the patient, resorption of the femoral calcar and failure of the cement mantle. Fractures in uncemented revision femoral stems are rare and are attributed to reduction in proximal support either in the(More)
Clarity Project is a fine jewelry company and social enterprise that recently began mining diamonds in Sierra Leone as part of its mission to improve the quality of life of artisanal miners in West African communities. This has presented a new challenge to the company: the site of Clarity Project's new mining compound is distant from the country's modest(More)
This paper develops a formal definition of multidimensional trees as abstract structures in " left-child, right-sibling " form. After developing this abstract definition, we show how it can be directly implemented as an ADT suitable for use in parsing applications. Additionally, we show how, when viewed in a slightly different way, our definition yields a(More)