St. John's, Newfoundland and Labrador, Canada

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    ABSTRACT: The paper presents a systematic investigation of the effects of a corrosive condition on grain boundary corrosion and other deleterious phenomena in a nickel alloys commonly used in nuclear waste containers, chemical refining plants and steam generator tubes. Grain boundary corrosion is investigated with the aid of microscopy. The results show that a concentrated corrosive condition greatly increases the susceptibility to crack initiation and crack propagation along grain boundaries, i.e. intergranular fracture.
    Procedia Engineering 12/2015; 114:754-759. DOI:10.1016/j.proeng.2015.08.021
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    ABSTRACT: The small Unmanned Aerial Vehicle (UAV)11Small UAVs are classified as under 25kg according to recent Transport Canada guidelines for UAVs .[1] has been proposed as an ideal platform for an increasing number of civilian mission roles. However, the small size of this class of UAV, while beneficial for acquisition and operational costs, presents a problem when it comes to their ability to be seen by other aircraft. Unless some means of enhancing visibility is used, the small size creates an essentially invisible entity at normal aviation visual sighting ranges and therefore an increased collision risk. In this paper, a human factors experiment is presented where the visibility of a proposed aircraft lighting system was assessed in realistic night time conditions. These results have been compared against theoretical detection range estimates based on basic photonics and the capabilities of the human vision system, and the minimum sighting distances according to current aviation regulations. Other technologies proposed to improve the detectability of the small UAV are also introduced. The outcome of this research is a proposed minimum set of safety equipment which should make the small UAV at least as safe as equivalent manned aircraft operating in the same airspace.
    12/2015; 3:944-951. DOI:10.1016/j.promfg.2015.07.143
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    ABSTRACT: This paper is a summary of efforts to develop alternative methods to control small Unmanned Aerial Vehicles (UAV)1 in manual mode while at Beyond Line of Sight (BLOS) range. While it is true that the majority of the UAV airborne activities will be in autonomous mode (i.e. using an autopilot) this may not always be the case, especially if there is a failure of the autopilot or need for an emergency manual override maneuver. This requirement for an emergency manual back-up mode during all flight stages remains in proposed UAV regulations being defined in the U.S., Canada and Europe. This paper proposes a possible manual pilot console using a combination of an extended-range First Person View (FPV) video augmented by a synthetic simulation environment. Practical field testing of the various elements which make up this system is presented.
    12/2015; 3:960-967. DOI:10.1016/j.promfg.2015.07.146


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    St. John's, Newfoundland and Labrador, Canada
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Top publications last week by reads

Journal of Environmental Management 04/2011; 92(4):1198-209. DOI:10.1016/j.jenvman.2010.12.013
351 Reads
Reviews of Geophysics 11/2015;
285 Reads

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