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Full-Text Articles in Social and Behavioral Sciences
Aids: Implications To Society And Approaches To Control, Robert W. Sidwell
Aids: Implications To Society And Approaches To Control, Robert W. Sidwell
Faculty Honor Lectures
It is perhaps a measure of today's society that a new disease of potentially world-wide implication does not gain national or international attention until a famous person contracts it. This was particularly seen with Acquired Immunodeficiency Syndrome (AIDS) when it became known that Rock Hudson of movie and TV acclaim was dying of it. By the time the celebrated pianist and entertainer Liberace died of AIDS, the various public health agencies around the world had begun to focus on the problem, and enormous sums of money were being committed toward its control. Today, more U.s. dollars are budgeted for AIDS …
Integrated Control Of Thermally Distorted Large Space Antennas, Robert H. Tolson
Integrated Control Of Thermally Distorted Large Space Antennas, Robert H. Tolson
Mechanical & Aerospace Engineering Theses & Dissertations
Studies on controlling the thermal distortion of large space antennae have generally investigated a single orbital position and have optimized actuator locations based on minimizing the RMS surface deviation from the original parabolic shape. One study showed the benefits of directly using far zone electric field characteristics as the performance measure; but, this approach resulted in a nonlinear programming problem. The objective of the current study is to develop an approach to designing a control system that (1) recognizes the time dependence of the distortion and (2) controls variables that are directly related to far field performance in a quadratic …