SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Fringe pattern motion is compensated by closed-loop servo system that adjusts a mirror mounted on piezoelectric crystal, so that path difference in interferometer is maintained at constant values at one point in the field. System is applicable to holography with continuous wave laser sources.
Patterns with small lettering and intricate designs are prepared by using two-dimensional artwork, photographic reduction and Dycril. Two-dimensional artwork and photographic processes replace conventional relief work. Artwork size is convenient and does not restrict lettering and design size in casting.
Lens rotation technique of noise diffraction pattern elimination spreads diffracted energy, normally concentrated over small area of image, over much larger annular area. Technique advantages include simplified lens selecting process, reduced clean room requirements, and low cost equipment requirements.
Stability of sleep patterns in young adults for sequential nights over three week period
Metal pattern bonding technique for cover glass attachment to silicon solar cells for space applications
Design and testing of document retrieval system based on development of Boolean file searching instructions and pattern recognition
Monopulse scanning network for scanning volumetric antenna pattern
Computer program for calculating radiation pattern of ATS 6 flexible rib-reinforced reflector
Wind tunnel tests to determine flow patterns and pressure distributions around bluff afterbody in wake of 120 deg cone for various separation distances at Mach 3.0
Multiclass sequential hypothesis with applications in pattern recognition
Interpretation of vertical wave patterns in winter atmosphere at high latitudes in terms of gravity waves theory
Swathing patterns of earth-sensing satellites and their control by orbit selection and modification
Quantitative determination of optical imperfection by mathematical analysis of Foucault knife edge test pattern in large orbiting telescope
Radiation patterns of dipole antenna in stratified medium representing lunar surface
NASTRAN-GAP programs for analyzing antenna radiation patterns of reflectors distorted by gravity and thermal loads
Pattern classification algorithms using potential functions to construct discriminant functions from sample points set
Gold plated Ge surfaces, investigating LEED patterns and electronic properties
Helicopter in-flight noise radiation pattern and spectra measurements for various operating parameters