Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

A paper submitted to The University of Arizona College of Medicine - Phoenix, History of Medicine course.

Master of Science

</p> <p>The basis for this report was President Bush's proclamation that the u.S. should land astronauts on Mars by 2019 A.D. In such a trip, astronauts would be in a weightless environment for a considerable length of time. This report examines different conditions and environments that could cause stress during such a long duration space mission. Both psychological and physiological conditions are examined and the human factors implications of those potential problems are discussed. Finally, recommendations are made as to potential countermeasures and/or standards that should be followed.</p> / Master of Science

Long-duration spaceflight poses many challenging technical and non-technical problems that must be addressed. Past experience with long space missions has shown that the medical and psychological issues in the human factors realm that may arise are serious enough to require high-level consideration in the overall systems development process. <p> An essential aspect of the total systems development process for long-duration space missions entails the conception of a variety of countermeasures to combat the degradative effects of microgravity, isolation and confinement. These effects should be considered within a larger mission/systems framework. Additional factors within a broad systems perspective include the notion that context is an important attribute of the overall system state and may directly affect the astronauts' psychological health and the physical ability to perform required tasks. <p> A review of the literature in the psychosocial and medical realms is presented as these concerns impact the human factor within the macro-system goal of successful long-duration spaceflight mission completion. / Master of Science

Access to abstract permanently restricted to Ball State community only / Access to thesis permanently restricted to Ball State community only / School of Physical Education, Sport, and Exercise Science

Thesis--School of Advanced Airpower Studies, 1996. / Shipping list no.: 1998-0921-M. "September 1997." Includes bibliographical references. Also available via Internet from the Air University Press web site. Address as of 11/3/03: http://aupress.au.af.mil/SAAS%5FTheses/Rampino/rampino.pdf; current access is available via PURL.

A homotopy approach for solving constrained parameter optimization problems is examined. The first order necessary conditions, with the complementarity conditions represented using a technique due to Mangasarian, are solved. The equations are augmented to avoid singularities which occur when the active constraint set changes. The Chow-Yorke algorithm is used to track the homotopy path leading to the solution to the desired problem at the terminal point. Since the Chow-Yorke algorithm requires a fairly accurate computation of the Jacobian matrix, analytical representation of the system of equations is desired. Consequently, equations obtained using the true anomaly regularization of the governing equations were employed for the above purpose. A homotopy map suited for the space-flight rendezvous problem including a minimum radius constraint is developed, which can naturally deform any initial problem into some other valid desired problem. Several coplanar and non-coplanar solutions for circular and elliptic cases have been presented for the restricted time problem with a minimum radius constraint. / Ph. D.

Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND AERONAUTICS. / Vita. / Includes bibliographical references. / Ph.D.

Thesis (Ph. D.)--Rutgers University, 2009. / "Graduate Program in Public Administration." Includes bibliographical references (p. 242-247).