Discovery of periodic variations in the circular polarization of the white dwarf G195-19
Periodic variations in circular polarization of continuum radiation of white dwarf G195-19 from 3800 to 5400 A
Angel, J. R. P.↗
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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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Automated and conventional photometry of the short-period variable star 14 Aurigae
Automated and conventional photometry of short period variable star 14 Aurigae, using automatic telescope
Chiu, H.-Y.↗
Numerical analysis of wave propagation on a periodic linear array
Numerical solution of current distribution, wave propagation constant and propagation mode cut-off frequencies on periodic linear array
Shen, L.-C.↗
Application of singular eigenfunction expansions to the propagation of periodic disturbances in a radiating grey gas
Periodic disturbances propagation in radiating gray gas, using singular eigenfunction expansions
Cheng, P.↗
Endogenous short period rhythms in the movements of unifoliate leaves of Phaseolus angularis Wight
Endogenous short period rhythms in rotational movements of unifoliate leaves of Phaseolus angularis Wight grown under controlled environmental conditions
Alford, D. K.↗
The generation of magnetic fields in astrophysical bodies. VI - Periodic modes of the galactic field
Galactic dynamo generated magnetic field periodic modes based on mathematical model involving cyclonic turbulence and nonuniform rotation of gaseous disk
Parker, E. N.↗
Evidence for multiple periodicity in the X-ray emission from Cygnus X-1
Multiple periodicity of Cygnus X-1 X ray emission from rocket sounding
Bleach, R. D.↗
Photoelectron count distributions due to periodic irradiance modulation
Ejected photoelectron count probability distribution due to periodic irradiance modulation of amplitude stabilized light beam
Clark, W. G.↗
Discovery of periodic X-ray pulsations in Centaurus X-3 from UHURU
Large amplitude periodic X ray pulsations from Centaurus X-3, observing abrupt source intensity and pulse rate changes
Giacconi, R.↗
Discrete radiation from rotating periodic sources
Discrete frequency sound radiation from rotating periodic sources covering rotor blade noise in near field and from disk loading asymmetries
Wright, S. E.↗
A conjecture concerning the transition period for variable stars
Transition period for variable stars, considering helium sensitive relationship to luminosity obtained with nonlinear theory
Iben, I., Jr.↗
Periodic collision orbits in the elliptic restricted three-body problem
Two dimensional elliptic restricted three body problem, considering regularization mechanism and periodic collision orbits
Broucke, R.↗
Bicarbonate requirement for elimination of the lag period of Hydrogenomonas eutropha
Bicarbonate requirement for elimination of lag period of chemoautrophically grown Hydrogenomonas eutropha
Ambrose, C. A.↗
Asymptotically almost periodic solutions of a nonlinear Volterra system
Nonlinear Volterra integral equation system solution using almost periodic forced oscillations
Miller, R. K.↗
Correlated transient short-period oscillation in the optical and X-ray flux from Scorpius X-1
Scorpius X-1 optical and X ray flux transient short period oscillations correlation from Aerobee sounding rocket data
Angel, J. R. P.↗
Periodic orbits in the rectilinear restricted three-body problem
Three body problem of two heavy mass particles oscillatory motion in periodic orbits on straight line under Newtonian attraction
Broucke, R.↗
Stability conditions derived from spectral theory - Discrete systems with periodic feedback
Stability conditions of linear discrete system with periodic feedback from spectrum location of bounded linear operator acting in Banach space
Davis, J. H.↗
The significant solar proton events in 20th solar cycle for the period October 1964 to March 1970
Solar proton data are presented from observations by the Explorer 21, 28, 34 and 41 satellites. The NASA Solar Particle Alert Network (SPAN) solar optical and radio frequency data for the period May 1967 to March 1970 are associated with the proton events observed by the Explorer 34 and 41 satellites; however, missing data are supplemented with data recorded at other international observatories. From a radiation hazard standpoint, NASA is concerned with solar proton events of the order of 10 to the 8th power proton/sq cm. Radiation dose data are presented for some of the large proton events that have occurred thus far in the 20th solar cycle and are compared with some of the large proton events of the 19th solar cycle. Finally, the results of a simple parametric correlation study are presented for both the 19th and 20th solar cycles.
Atwell, W.↗