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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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Equilibrium configurations between density and topographic surface irregularities in two- dimensional purely elastic earth model
Interstellar gas in nuclei of elliptical, S0, spiral and irregular galaxies
A simplified method is presented for estimating the lift-curve slope of irregular planform wings at subsonic speeds and low angles of attack. The present process is an extension of the method derived in NACA Technical Note 3911 and enables quick estimates of subsonic liftcurve slope, to be made whereas more refined procedures require considerable time and computation. Comparison of experimental and estimated values for a wide range of wing planforms having discontinuous spanwise sweep variation indicates good agreement. A comparison of the present procedure with a 20-step vortex method (NACA Research Memorandum L50L13) indicated good agreement for a variable-sweep configuration.
Clamp holds irregularly shaped pieces in lathe chuck without damage and eliminates excessive time in selecting optimum mounting. Interchangeable jaws ride in standard jaw slots but swivel so that the jaw face bears evenly against the workpiece regardless of contour. The jaws can be used on both engine and turret lathes.
Alignment tool facilitates spotting and cementing plastic pins on the true vertical to irregular concave and convex surfaces. The tool consists of a wood tripod with individually adjustable legs, a wood block with a hole for placing the pins and two spirit levels at a 90 degree angle for easy alignment.
Nonlinear regression and variance analyses of periods defined by irregular observations
Ionospheric propagation of spherical waves through inhomogeneous medium containing anisotropic irregularities
Low energy cosmic ray modulation relationship to observed interplanetary magnetic field irregularities in terms of diffusion, using space probes
Two-dimensional purely elastic Earth model used to study elastic equilibrium configuration between density and topographic surface irregularities
Error free recovery of signals from irregularly spaced samples in terms of completeness of sets of nonharmonic exponentials
Instrumentation techniques and autocorrelation analysis procedures for secondary equatorial electrojet irregularities
Statistical mechanics of charged particles in presence of magnetic irregularities
Irregular variations of earth rotation velocity explained by action of solar corpuscular streams on magnetosphere
Interrelation between irregular events in lower ionosphere of auroral zone and disturbances in outer radiation belt
Video electromechanical probe visually inspects and measures internal offset and peaking of welds in relatively large piping. Irregularity dimensions are recorded on peripheral equipment consisting of video tape and X-Y plotter. The probe is used for inspection of vacuum-jacketed liquid lines that cannot be inspected externally.
Report presents test data on the bending fatigue life of notched sheet specimens. The influence of a surface irregularity on the fatigue life of a metal bellows is evaluated, with emphasis on accidental defects in ducting bellows which are impossible to avoid short of completely eliminating human contact.
Evaluation of moon crater polygonality, and irregular shapes
Propagation of Love waves in layers with irregular boundaries studied by earth model in which half space is elastic