Skylab D024 thermal control coatings and polymeric films experiment

The Skylab D024 Thermal Control Coatings and Polymeric Films Experiment was designed to determine the effects of the external Skylab space environment on the performance and properties of a wide variety of selected thermal control coatings and polymeric films. Three duplicate sets of thermal control coatings and polymeric films were exposed to the Skylab space environment for varying periods of time during the mission. The specimens were retrieved by the astronauts during extravehicular activities (EVA) and placed in hermetically sealed return containers, recovered, and returned to the Wright Laboratory/Materials Laboratory/WPAFB, Ohio for analysis and evaluation. Postflight analysis of the three sets of recovered thermal control coatings indicated that measured changes in specimen thermo-optical properties were due to a combination of excessive contamination and solar degradation of the contaminant layer. The degree of degradation experienced over-rode, obscured, and compromised the measurement of the degradation of the substrate coatings themselves. Results of the analysis of the effects of exposure on the polymeric films and the contamination observed are also presented. The D024 results were used in the design of the LDEF M0003-5 Thermal Control Materials Experiment. The results are presented here to call to the attention of the many other LDEF experimenters the wealth of directly related, low earth orbit, space environmental exposure data that is available from the ten or more separate experiments that were conducted during the Skylab mission. Results of these experiments offer data on the results of low altitude space exposure on materials recovered from space with exposure longer than typical STS experiments for comparison with the LDEF results

F17RS SGFB No. 4 (Microwave)

A FINANCE BILL To allocate eighty-five dollars and zero cents ($85.00) from the Legislative Initiatives account to fund one (1) microwave for Middleton Librar

Calculating Drag and Moments in an Unsteady Free Stream Using Unified Airloads Theory

The Unified Finite State Airloads theory (Unified Theory) developed by Dr. Dave Peters and his former students was used to produce curves for moment and drag in an unsteady free stream. Previous work has been done to show that the Unified theory exactly matches Issacs for lift and CL in an unsteady free stream with a time varying angle of attack (α). This report will demonstrate in detail how to calculate lift, drag, moment about mid chord, and moment about quarter cord and their coefficients (CL, Cd, Cm, Cm(3/4)) using the Unified theory. A useful approximation to the Unified Theory, the Greenberg Approximation, neglects the effect of the time varying free stream velocity on the wake. The accuracy of the Greenberg approximation is quantified over the 3 cases of angle of attack for each of the calculated loads

Psycho-social effects of a brain-training program among healthy older adults

Grounded in cognitive neuroscience and social exchange theory, this research evaluated the relationship between changes in cognitive functioning and two psycho-social dimensions of life among healthy adults over the age of 70 (N=12). Specific psycho-social dimensions examined were social interaction and depression. Six females and six males participated in the study. All were white, college-educated individuals residing in a life-care residential retirement community. The participants used the Posit Science® Brain Fitness Program™, an auditory-based computer training program that improves memory and speed of processing, for forty hours over an eight-week period. Pre- and post-tests related to social interaction and depressive symptoms indicated that improvement in cognitive functioning was related to improvement in psychosocial dimensions in later life

IMPERFECT MARKET-MAKER COMPETITION, HETEROGENEOUS EXPECTATIONS, AND THE FAVOURITE-LONGSHOT BIAS IN WAGERING MARKETS

In the study of wagering markets, it is generally the case that the objective probabilities of various contestants (horses, teams, etc.) winning do not match those implied by the betting. More often than not favourites are underbet and longshots overbet, although some studies have found the reverse. We offer an explanation in the case where there is imperfect competition among book-makers and heterogeneous expectations among bettors

William Nathaniel Irving (1927-1987)

William Nathaniel Irving died on November 25, 1987. He was an arctic archaeologist and professor of anthropology at the University of Toronto, internationally recognized as a leading scholar in arctic prehistory. His contributions were significant and appreciated during his lifetime. His initial research interests were in the Inuit cultures of northern Alaska and their antecedents, which led him to study both their ethnoarchaeology and the systematics and technology of stone implements, e.g., those of the arctic small tool tradition. His major research focus in the last two decades of his career was in searching in the northern Yukon for answers to a problem that puzzled anthropologists for over a century - when did humans enter the New World? Irving spent a good deal of time studying this topic while continuing to fulfill his university responsibilities as teacher, administrator and director of numerous graduate students. ..