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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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Evaluation of turbulent shear models and prediction of compressible turbulent boundary layers by method of weighted residuals
Analytic model of boundary conditions for heat transfer coefficients through porous walls
Mineralogy and petrology of lunar rock and soil samples returned from Apollo 14 landing site
Station longitude error effects on Doppler plus range and Doppler only orbit determination solutions, emphasizing Viking mission trajectory
Noctilucent cloud particle size composition and origin from sounding rocket flight and control collecting surfaces
Goethite stability on Mars, considering dehydration-rehydration cycle and time average atmospheric water vapor content
Cosmic ray particles diffusion with simultaneous energy transport, using leakage lifetime approximation
Reassessment of Cotter model startup in Li heat pipe, modifying model by moving sonic point to end of hot zone and including wall friction and condensation
Atmospheric muons anomalous zenithal distribution at extremely high energy regions
Alpha radioactivity in Surveyor 3 camera visor, calculating upper limit of Po 210 at equilibrium of Oceanus Procellarum
The following material presents the results of two temporally remote administrations of an identical projective personality assessment device (Rorschach Inkblot) using crew members aboard the 90-day test. The first administration took place during preselection crew psychodiagnostic testing in the period extending from mid-December 1969 through mid-January 1970. Second administration took place in late May and early June, 1971, approximately one year after termination of the test. During the 90-day program duration, the subjects participated in the crew training program, were selected and served as onboard crew during the 90-day test. The testing was undertaken in order to determine the character and extent of change (if any) in basic personality dynamics accompanying or caused by participation in the 90-day test program. Results indicate that significant personality changes occurred in three of the four onboard crew members. A detailed discussion of the results is provided. Objective scores which served as the basis for the discussion are presented in the Appendix.
A comprehensive inventory of a series of remote sensing applications for a variety of regional planning programs in metropolitan Washington was undertaken. Examples of application, methods for data utilization, and corresponding photographic illustrations are provided illustrating how remote sensing would prove particularly useful as a unique and/or supplemental data source.
General principles and details of the actual procedure are presented for the preparator. Some background information is given on why certain lapping, polishing, and gluing procedures are needed. It is directed toward the innovative preparator who wishes to further refine procedures or to use some of his own techniques for some steps in the processing sequence. Specific details on the single procedure found to be most successful for lunar dense rocks, breccias, and particulates are outlined. A complete listing of equipment and supplies is appended.
Development of improved procedures is reported for three classes of lunar materials: dense rocks, breccias, and particulates. High quality ultrathin sections of these materials are obtained. Lists of equipment and supplies, procedures, photomicrographic documentation, and training are provided. Advantages of ultrathin polished sections for conventional and unconventional optical microscopy methods are described. Recommendations are provided for use of ultrathin sections in lunar rock studies, for further refinement of ultrathinning procedures, and for additional training efforts to establish a capability at the Manned Space Center. For Part 2, See N72-50754.
The operation and external appearance of the surface sampling scoop are discussed. An attempt was made to measure the magnitude of the existing adhesion between the lunar soil and the various surfaces of the scoop.
An approximate collision analysis, termed the collision-force method, was developed for studying impact-interaction of an engine rotor blade fragment with an initially circular containment ring. This collision analysis utilizes basic mass, material property, geometry, and pre-impact velocity information for the fragment, together with any one of three postulated patterns of blade deformation behavior: (1) the elastic straight blade model, (2) the elastic-plastic straight shortening blade model, and (3) the elastic-plastic curling blade model. The collision-induced forces are used to predict the resulting motions of both the blade fragment and the containment ring. Containment ring transient responses are predicted by a finite element computer code which accommodates the large deformation, elastic-plastic planar deformation behavior of simple structures such as beams and/or rings. The effects of varying the values of certain parameters in each blade-behavior model were studied. Comparisons of predictions with experimental data indicate that of the three postulated blade-behavior models, the elastic-plastic curling blade model appears to be the most plausible and satisfactory for predicting the impact-induced motions of a ductile engine rotor blade and a containment ring against which the blade impacts.
A computer study was conducted to compare the numerical behavior of two approaches to describing the thermodynamic properties of oxygen near the critical point. Data on the relative differences between values of specific heats at constant pressure (sub p) density, and isotherm and isochor derivatives of the equation of state are presented for selected supercritical pressures at temperatures in the range 100 to 300 K. The results of a more detailed study of the sub p representations afforded by the two methods are also presented.
The opaque mineralogy of the Luna 16 soil sample is studied, with an emphasis on a detailed survey of the compositional variations of the Fe-Ti-Cr-Al-Mg spinels. Analytical data are also presented for ilmenite. Textural characteristics and shock-metamorphic effects on the opaque minerals are briefly described and comparisons are made throughout between the Luna 16 samples and published and unpublished data on the Apollo samples.