By George A. Hazelrigg, Joseph M. Reynolds
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Extra resources for Opportunities for academic research in a low-gravity environment
This hybridized model is then fitted to the data. At the extremes of the fitting region where departures are seen, data are rejected on the grounds that the model is not adequate there. The resulting good fit with four or so free parameters is then taken as support for the theory! With so many free parameters and wide discretion in the rejection of data, it is hardly surprising that seemingly reasonable model fits can be obtained. This lamentable situation has been noted by others, as illustrated by the following quotation from a paper by H.
E. HALPERN THERMAL CONTROL SYSTEM DATA MANAGEMENT SYSTEM Fig. 19 The materials experiment assembly. /MAXIMUM EXPERIMENT VOLUME 16 32 OIA WITH 25 CLEARANCE AT TOP VOLUME USED FOR ELECTRICALAND SIGNAL INTERFACES MAY ALSO BE USED FOR EXPERIMENT APPARATUS 4 Fig. 20 The payload bay experiment apparatus container. RESEARCH FACILITIES AND PROGRAMS 23 MSL host subsystems for control and support (see Fig. 20). The EAC is suited to experiments with greater weight and power requirements than are available on the middeck.
Dr. Mary Helen McCay of the Marshall Space Flight Center conducted an investigation to solidify samples of MAR-M246 in low gravity and compare these to groundprocessed specimens. MAR-M246 is a nickel-based superalloy with carbon and boron fibers that is used in high-temperature applications. The samples produced in low gravity had a different secondary dendrite spacing, a decrease in carbide volume fraction, and a carbide shape change. These results could enhance the high-temperature properties.
Opportunities for academic research in a low-gravity environment by George A. Hazelrigg, Joseph M. Reynolds