Mitigating Bias in CMB B-modes from Foreground Cleaning Using a Moment Expansion
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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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Adhesion mechanisms between solid metal surfaces
Prebreakdown gap currents measured between tungsten electrodes with known amounts of cesium and/or oxygen on surfaces
NASA zero power reactor II to determine critical masses
Bibliography on contamination control, and air filtering for application to electronics and surgical instruments
Reduction of adhesive forces and friction of iron polycrystals in vacuum by chemisorbed films
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Q switched lasers for obtaining clear surfaces in vacuum
Oxygen 18 adsorption on silicon activation analysis measurements used to obtain kinetic curve for chemisorption from monolayers
LEED and Auger emission analysis of effects of oxygen on adhesion of iron surfaces
Determining work functions and temperature coefficients by relative field emission method
LEED pattern and germanium surface conductivity during oxidation indicating electron states annihilation
OGO-6 surface contamination by outgassing in space environment and decontamination by sputtering and desorption
Ultrahigh vacuum deposited Ni, Fe, W and Mo films, determining molecular oxygen adsorption efficiencies
Contact resistance has been used to characterize the processes of physical contact in metallic systems with ultraclean surfaces. The contact resistance versus load curves of iron and two cobalt alloys were used to demonstrate the existence of surface work hardening and interfacial creep during contact as well as the fracture characteristics of an interfacial junction as the load is removed. The presence of an adsorbed film of hydrogen or hydrogen ions on iron completely changes the contact process. A comparison of the contact resistance versus load data for ultrapure iron, and iron-cobalt alloy, and a cobalt molybdenum-chromium was used to illustrate the effect of substrate mechanical properties on static adhesion and the ability to convert these data for the estimation of the dynamic coefficient of friction under the particular experimental conditions.
System holds filter bag around fine-mesh metal screen and vibrates screen at its resonant frequency. This removes deposited byproducts and protects bag fibers from damaging forces. Because filter bags represent 20 to 40% of any industrial filtering investment, this method of extending bag life should be of interest to those responsible for plant maintenance.
Self contained unit can backflush filter elements in fraction of the time expended by presently used equipment. This innovation may be of interest to manufacturers of hydraulic and pneumatic systems as well as to chemical, food, processing, and filter manufacturing industries.