William R. Knecht

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Existing computational models of structurefrom-motion — the appearance of three-dimensional motion generated by moving two-dimensional patterns — are all based on variations of optical flow or feature point correspondence within the interior of single objects. Three separate phenomena provide strong evidence that in human vision, structure-from-motion is(More)
OBJECTIVE This study explores operators' ability to use a multidimensional, nonveridical control display. BACKGROUND Veridical displays represent realistic scenes. State space displays represent nonveridical n-dimensional information based on informative coordinate axes plus variable features such as color and shading. Empirical investigation of state(More)
BACKGROUND Is there a "killing zone" (Craig, 2001)-a range of pilot flight time over which general aviation (GA) pilots are at greatest risk? More broadly, can we predict accident rates, given a pilot's total flight hours (TFH)? These questions interest pilots, aviation policy makers, insurance underwriters, and researchers alike. Most GA research studies(More)
Next-Generation Radar (NEXRAD) is an important decision-support tool for air traffic control (ATC). It is currently being introduced into aircraft cockpits, and will be equally important for remote piloting of unmanned aerial systems (UAS). Unfortunately, numerous studies strongly suggest that manually estimation of closest point of approach (CPA) to heavy(More)
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