Mark Sheehan

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This paper describes a method for the automatic self-calibration of a 3D Laser sensor. We wish to acquire crisp point clouds and so we adopt a measure of crispness to capture point cloud quality. We then pose the calibration problem as the task of maximising point cloud quality. Concretely, we use Rényi Quadratic Entropy to measure the degree of(More)
This paper describes the design, build, automatic self-calibration and evaluation of a 3D Laser sensor using conventional parts. Our goal is to design a system, which is an order of magnitude cheaper than commercial systems, with commensurate performance. In this paper we adopt point cloud “crispness” as the measure of system performance that we wish to(More)
Participants in some clinical trials are at risk of being harmed and sometimes are seriously harmed as a result of not being provided with available, relevant risk information. We argue that this situation is unacceptable and that there is a moral duty to disclose all adverse clinical trial results to participants in clinical trials. This duty is grounded(More)
Research in the emergency setting involving patients with acute clinical conditions is needed if there are to be advances in diagnosis and treatment. But research in these areas poses ethical and practical challenges. One of these is the general inability to obtain informed consent due to the patient's lack of mental capacity and insufficient time to(More)
This paper reports on some of the robotic platforms used in the project AUROSO which investigates the use of robots as educationally useful interventions to improve social interactions for individuals with Autism Spectrum Disorders (ASD). Our approach to treatment uses an educational intervention based on Socially Assistive Robotics (SAR), the DIR/Floortime(More)
The story of Ashley, a nine-year-old from Seattle, has caused a good deal of controversy 1 Ashley was born with a condition called static encephalopathy, a severe brain impairment that leaves her unable to walk, talk, eat, sit up, or roll over. According to her doctors, Ashley has reached, and will remain at, the developmental level of a three-month-old. 2(More)
The authors claim that the risks associated with biobanks are minimal and greatly outweighed by the benefits. Some people would disagree. But even if we could agree about the risks and benefits, different people would weigh them differently: for some, control of personal information is very important and for others less so. For this reason, the authors’(More)
PURPOSE To report a systematic review of endovascular management of visceral and renal artery aneurysms (VRAA) and results at a tertiary referral center. MATERIALS AND METHODS A literature review was performed via a comprehensive electronic search of PubMed, MEDLINE, EMBASE, and Cochrane databases, followed by retrospective analysis of all VRAAs treated(More)