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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Designing experiments on fluid behavior at near-critical state and liquid drop dynamics in weightlessness for Apollo/LEM spacecraft in earth orbit
Experiment designs for collecting human factors engineering data on advanced space systems maintenance
Parabolic expandable truss antenna experiment design for Apollo applications program
Permeability characteristics and transport properties of membranes for salt water conversion, and experiment designs
Biosatellite experiments designed to investigate space environment effect on living organisms
Ductility ratio data for high strength titanium alloys from specially designed experiments and notch strength tests
Objectives and experiment designs for Apollo telescope mount
Apollo 11 passive seismic experiment design and objectives, describing seismometer characteristics and lunar interior
Primary cosmic ray nuclei studies during Gemini 2 flight by nuclear emulsion detector with time resolution capability, describing experiment design and equipment operation
Balloon flights with space available for secondary experiments, discussing launching agencies and experiment design restrictions
Passive seismic experiment design changes and tests for Viking Mars Program
ATS-F solar cell radiation damage experiment design and ground tests including space environment simulation and low-energy proton and electron irradiation
Apollo Telescope Mount experiment designed to study energy of sun from wavelength of 200 to 2000 ph /2 to 20 A/ using X ray source
Separator provides broad beam of protons free of other charged species to simulate the solar wind in experiments designed to determine effect on materials.
Unique methods for analyzing individual particles ranging in size from 0.01 to 1000 micrometers have been developed for investigation of nature of cosmic dust. Methods are applicable to particulate aerosols and contaminants characteristically encountered in studies of air pollution and in experiments designed to abate pollution.
The effect of several environmental parameters on previously developed life detection systems is explored. Initial attempts were made to conduct all the experiments in a moist mode (high soil volume to water volume ratio). However, only labeled release and measurement of ATP were found to be feasible under conditions of low moisture. Therefore, these two life detection experiments were used for most of the environmental effects studies. Three soils, Mojave (California desert), Wyaconda (Maryland, sandy loam) and Victoria Valley (Antarctic desert) were generally used throughout. The environmental conditions studied included: incubation temperature 3 C to 80 C, ultraviolet irradiation of soils, variations in soil/liquid ratio, specific atmospheric gases, various antimetabolites, specific substrates, and variation in pH. An experiment designed to monitor nitrogen metabolism was also investigated.
Consolidated powders of four nickel-base superalloys were studied for potential application as compressor and turbine discs in jet engines. All of the alloys were based on the Rene' 95 chemistry. Three of these had variations in carbon and A12O3 contents, and the fourth alloy was chemically modified to a higher volume fraction. The A12O3 was added by preoxidation of the powders prior to extrusion. Various levels of four experimental factors (1) alloy composition, (2) grain size, (3) thermomechanical processing, and (4) room temperature deformation plus final age were evaluated by tensile and stress rupture testing at 1200 F. Various levels of the four factors were assumed in order to construct the statistically-designed experiment, but the actual levels investigated were established in preliminary studies that preceded the statistical process development study.
A summary report of a research effort related to the human visual accommodation system is presented. A theoretical study of the accommodation system was made. Subsequent effort was aimed at the development of specialized instrumentation for experiments designed to lead to understanding the nature of the control system in human accommodation. The necessary instrumentation consisted primarily of: (1) an automatic optometer to measure the state of eye focus, (2) a focus stimulator device to control the apparent optical distance to any target, and (3) a two-dimensional eye tracker. The concepts and designs of the first two instruments have been published in the open literature, but this report contains the first detailed treatment of the Purkinje eye tracker developed under this program. The report also discusses an accommodation lag model to explain the ability of the eye to apparently know the polarity of focus error even though the blur on the retina is to a first-approximation an even function. The interaction of the accommodation and eye movement systems is also discussed, as is the ability to train the visual accommodation system to a surprisingly responsive condition in only a few hours of training.