The structure of the lunar surface as indicated by the geometry of impact craters.
Penetration depth of hypervelocity impact craters photographed by Luna and Ranger vehicles indicate granular lunar surface
PHOTOGRAPH INTERPRETATION↗
SEARCH · Engineering Papers
Results for “PENETRATION”
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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Prediction on the velocity field coming from convective overshoot in a layer overlying a convectively unstable atmospheric region.
Penetrative motion of individual elements in earth atmosphere and prediction of velocity field from convective overshoot
MIXING LENGTH FLOW THEORY↗
Electron transport theory, calculations, and experiments.
Electron transport theory for energy below 10 Mev, reviewing interactions, scattering, thick targets, complex geometry and penetration in space environment
SPACE RADIATION↗
Protection against space radiation
Space radiation transport, spacecraft shielding design and advanced concepts, and methods for calculating radiation penetration through protective shields - conference
Obrien, K.↗
The Explorer 23 micrometeoroid satellite. Description and results for the period November 6, 1964, through November 5, 1965
Stainless steel penetration detector, impact detector, and solar cell degradiation, to study micrometeoroid impact damage and puncture rate, and radiation effects on Explorer 23 satellite
Oneal, R. L.↗
Nonlinear Waves with a Magnetic Field in the Cosmic Plasma
Solution of two fluid magnetohydrodynamic equations as nonlinear ionic waves providing mechanism for cosmic rays generation and for plasma penetration of magnetosphere
Gintsburg, M. A.↗
Advanced studies on multilayer insulation systems Final report
Heat flow through pipe penetration into multilayer insulation
Barber, J.↗
Particles incident on magnetic field gradients.
Trajectory and penetration of single charged particle coming from field free region to boundary of idealized two dimensional magnetic field
Comstock, C.↗
Results from the Gemini S-10 and S-12 micrometeorite experiments.
Gemini S-10 and S-12 micrometeorite experiment results, discussing craters and penetration holes in stainless steel and thin film nitrocellulose materials
Hallgren, D. S.↗
The prediction of nozzle material performance for NASA's 260 SL-3 motor.
Nozzle erosion profile, char penetration and temperature response predicted for nozzle material for 260 SL-3 motor
Moody, H. L.↗
Meteoroid hazard near moon.
Meteoroid hazard in near moon environment, measuring rate of penetration of metal skin with Lunar Orbiters
Grew, G. W.↗
Radar studies of the earth.
Radar backscattering from earth investigated by aircraft and rocket flights, discussing echo vs altitude and penetration of wave into surface
Brown, W. E.↗
Shortened processing time technique for color industrial radiography
Improved processing method reduces time required to generate a color radiograph. Prior to, or after exposure to penetrating radiation, the emulsion side of the film is flashed to a colored light which produces the hue changes in the processed radiograph. Agitation of the film during processing assures uniformity of results.
Lapinski, N. P.↗
Mixing weld gases offers advantages
Argon added to helium during gas tungsten arc cover-pass welding in the horizontal position results in a better controlled wider bead width, increased arc stability, and reduction in heat input. Adequate filler material wetness and penetration pass coverage is possible with only one pass.
May, J. L.↗
Cover protects critical electrical connectors against damage during handling
Split-half cover eliminates the surface marring and dirt penetration problems previously encountered during handling and cable assembly. Metal retaining ring slips over the two plastic halves to hold them in place.
Campoy, A. Z.↗
Surface-renewal models for heat-transfer between walls and fluidized beds
Two surface-renewed film penetration models describe transient heat-transfer between a wall and a fluidized bed. Methods are presented for estimation of mean residence times of particles at the transporting surface, their age densities and the average transport coefficients.
Patel, R. D.↗
Asteroid Belt Meteoroid Hazard Study
Mathematical models for probability of successful traverse of asteroid belt or zero penetration of spacecraft shield
Alderson, D. J.↗
Helical duct geometry routine for the shielding computer program ''FASTER''
FASTER computer program modified for tracking neutrons through reactor slabs penetrated by helical voided ducts
Jordan, T. M.↗