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The objective of this paper is to describe the design and implementation of a small semi-autonomous fixed-wing unmanned air vehicle. In particular we describe the hardware and software architectures used in the design. We also describe a low weight, low cost autopilot developed at Brigham Young University and the algorithms associated with the autopilot.(More)
This paper explores the contribution of unconscious and experiential factors in accounting for the high rates of depression, alcohol and drug abuse and suicide within the medical profession. The first part of the paper reviews the literature on motivations to study medicine and proposes that, for some doctors, a component of their decision is a response to(More)
Constructing scientifically sound samples of hard-to-reach populations, also known as hidden populations, is a challenge for many research projects. Traditional sample survey methods, such as random sampling from telephone or mailing lists, can yield low numbers of eligible respondents while non-probability sampling introduces unknown biases. The authors(More)
Mouse strain differences suggest intermediate or multifactorial gentic control of chloroform-induced renal toxicity and death. The chloroform dose lethal to 50 percent of animals was four times higher in C57BL/6J males than in DBA/2J males. Twice as much chloroform accumulated in the kidneys of the sensitive as the resistant strain. First generation(More)
This thesis has been read by each member of the following graduate committee and by majority vote has been found to be satisfactory. As chair of the candidate's graduate committee, I have read the thesis of Derek Bas-tian Kingston in its final form and have found that (1) its format, citations, and bibliographical style are consistent and acceptable and(More)
The "free flight" concept of air traffic management has been suggested as a means of allowing aircraft operators to optimize heir flight paths and achieve greater operating efficiencies. It is also intended to relieve airspace congestion despite anticipated increases in the number of flight operations. Transitioning from centralized air traffic control to(More)
In September 2002, NASA's Advanced Air Transportation Technologies project office sponsored a human-in-the-loop simulation of Distributed Air/Ground Traffic Management (DAG-TM) concepts. The simulation examined three DAG-TM Concept Elements (CEs) which included: (1) CE 5 which is En Route Free Maneuvering for: (a) User-Preferred Separation Assurance; and(More)
The range of the Framework is very broad: from bit-level protocols through grand policyissues. While I appreciate the rationale for such a large scope, I wonder if the attempt to span such a range with just eight Interoperability Categories (or these specific Categories) couldn't be improved. In particular, while there is symmetry in having four categories(More)