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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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At least 307 records · Page 17

All sources NASA NTRS DOE OSTI

NASA NTRS1963

Directional dependence of counting rates from explorer iv /satellite 1958 epsilon/

Directional scintillation counter data from explorer iv satellite

EXPLORER IV SATELLITE↗

NASA NTRS1965

Simple BCD circuit accurately counts to 24

Ripple-through counter with divide-by-24 output pulse is used in digital control clocks to register hours and give a daily output signal. It uses commercially available digital modules that incorporate and/gates with flip-flops.

Spafford, M. L.↗

NASA NTRS1964

On counting topologies technical report no. 4

Number of distinct topologies formed by subsets of given set - set theory

TOPOLOGY↗

NASA NTRS1963

Scintillation Type Nuclear Densitometer, Model 143A. High Counting Rate, Scintillation Type Nuclear Densitometer, Model 143B. Evaluation of Precision Gamma Radiation Densitometer Techniques for Cryogenic Liquids

Nuclear densitometer utilizing gamma radiation attenuation to measure liquid oxygen and hydrogen densities

LIQUID HYDROGEN↗

NASA NTRS1967

Cleanroom air sampler counts, categorizes, and records particle data

Light scattering particle counter monitors particles in a clean room. It categorizes and records the particles according to size and functions simultaneously in three separate areas. The counter uses a transducer head to transform light signals into electric signals.

Nelson, M. B.↗

NASA NTRS1967

Strain gage circuitry provides fatigue testing machine with accurate cycle count

Fatigue tester determines the number of cycles to fatigue failure of brittle specimens. A strain gage on the loading arm records the loading applied to the component. As the component starts to break, the load is reduced and the strain gage stops the cycle counter.

Park, R.↗

NASA NTRS1967

Radiation counting technique allows density measurement of metals in high-pressure/ high-temperature environment

Radioactive tracers induced by neutron irradiation provide a gamma ray flux proportional to the density of a metal, allowing density measurement of these metals in extreme high-temperature and high-pressure environments. This concept is applicable to most metals, as well as other substances.

Dillion, I. G.↗

NASA NTRS1967

The vacuum probe for removing organisms for counting

Vacuum probe for assay and recovery of remaining microorganisms from large heat cycle sterilized surfaces

Morris, M. E.↗

NASA NTRS1968

Photon statistics for threshold laser light with finite counting time.

Time dependence of second, third and fourth cumulants of light intensity distribution of He-Ne laser operating just below threshold

Chang, R. F.↗

NASA NTRS1968

A comparison of photon counting and current measuring techniques in spectrophotometry of faint sources.

Dark noise component produced by Cerenkov pulses in photomultipliers due to cosmic ray muons, discussing spectrophotometry of faint astronomical sources

Tull, R. G.↗

NASA NTRS1968