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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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Radiative lifetimes measured by phase shift method for near and vacuum UV emission systems excited in low pressure barium, carbon and silicon fluoride gases
Atomic collision with rigid rotor at subthreshold energies compared to theoretical predictions of resonance energies and several variational principles for phase shift
Optimum design of phase shift keyed communication links for determination of modulation index with minimum error probability
Be photoionization cross section calculated noting autoionization dominance near threshold, 1P phase shift and resonances location
Radiative lifetimes of BBr and UV emissions in electron beam excited boron trifluoride gas from phase shift measurements, discussing molecular electronic transition moments
Atomic O 1302 A and 1152 A lines oscillator strengths determined from radiative lifetimes measured by phase shift
Double error probability in differentially coherent phase shift keyed communications systems, noting computerized simulation substantiation of theory
Adiabatic correlation function for variational lower bounds on positron-atom elastic scattering phase shifts for hydrogen and helium atoms
Synthesis of distributed systems with application to feedback networks for phase shift oscillators
Elastic scattering of slow electrons by negative H and positive Li ions, calculating differential cross sections and phase shifts
Fermi surface data of alkali metals interpreted in terms of interaction between conduction electrons and ionic lattice for deducing partial wave phase shifts
Electron excitation and phase shift method for radiative lifetimes of Ar II UV transitions
Nonhuman primate circadian rhythms as functions of phase shift carried out in advance or delay
Frequency discriminator has five integrated circuit chips interconnected to provide a divide function, exclusive OR function, phase shifting, and holding so that a single binary output signal results. The state of the binary signal indicates which one of the two input signals has a lower frequency than the other.
System suppresses spurious sinusoidal responses of any sinusoidally driven amplifier showing time-dependent phase shift versus frequency function. System is applicable to any sinusoidally driven amplifier. Technique eliminates, or reduces, unwanted spurious vibrations during tests to determine dynamic frequency responses of mechanical systems.
Phase shift miniature digital to analog converters for hybrid computers
Video image data transmission using millimeter wave relay satellites - biphase and quadriphase modulator systems for phase shift keying
Radiative lifetimes and total transition probabilities measured in polyatomic gases using phase shift method and electron beam excitation