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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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Clock Technology Development for the Laser Cooling and Atomic Physics (LCAP) Program
The Time and Frequency Sciences and Technology Group at Jet Propulsion Laboratory (JPL) has developed a laser cooling capability for flight and has been selected by NASA to support the Laser-Cooling and Atomic Physics (LCAP) program.
Higher Pole Linear Traps for Atomic Clock Applications
We investigate experimentally and theoretically higher pole linear ion traps for frequency standard use.
Ion-Atom Cold Collisions and Atomic Clocks
This paper is an investigation of ion-atom interactions in the cold and ultra-cold temperature regime. Some of the collisional ion-atom interactions present at room temperature are very much reduced in the low temperature regime.
A Proxy for the Upstream IMF Clock Angle Using MAVEN Magnetic Field Data
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The GALAH survey: chemical clocks
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Spaceflight decelerates the epigenetic clock orchestrated with a global alteration in DNA methylome and transcriptome in the mouse retina
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THE ATOMIC CLOCK AS A PHASE-STABLE OSCILLATOR FOR DEEP SPACE COMMUNICATIONS
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Neural control of hibernation in mammals, the relevance of physiological clocks and environmental factors Progress report, 1 Sep. 1965 - 28 Feb. 1966
Data processing and parameters for power spectral analysis of hibernation
Round-The-Clock Weather Photos Due from Nimbus
Nimbus-C meteorological satellite launch description
Cosmic clocks: a tight radius–velocity relationship for H i-selected galaxies
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Periodic shock with added clock.
Periodic shock in rats maintained on variable-interval schedule of reinforcement interspersed with sequence of three different stimulus conditions
An all monolithic MOS A/D converter - Low power clocks, multiplexers, registers, and A/D converter Final report
Research and developments of monolithic, MOS, ten bit, analog to digital converter
Absolute frequency of an atomic hydrogen maser clock
An accurate determination was made of the unperturbed atomic hydrogen ground state hyperfine transition frequency (F=1,m=0 - F=0,m=0) in reference to present world wide realizations of internationally defined time interval. In relation to the international atomic time system, the composite value is 1,420,405,751.7755 plus or minus 0.0031 HZ.
Evolutionary clock - Nonconstancy of rate in different species.
By using various methods for comparing polypeptide sequences we find that the evolutionary divergence of rattlesnake cytochrome c from cytochromes c of species in other classes has been more rapid than that of cytochrome c of another reptile, the snapping turtle. This suggests that the evolutionary rate of change of cytochromes c is species-dependent as well as time-dependent.