A Radical Departure from the ''steady State'' Concept in Cosmology
Radical departure from steady state theory in cosmology
COSMOLOGY↗
SEARCH · Search NASA
Results for “departures”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Earth-departure plane change and launch window considerations for interplanetary missions.
Earth departure plane change, interplanetary mission launches and launch windows
INTERPLANETARY TRAJECTORY↗
A simulator study of a pictorial navigation display in instrument departures of the supersonic transport
Simulator study of pictorial navigation display in instrument departure of supersonic transport
AIR TRAFFIC CONTROL↗
Optimal finite-thrust transfer between planet approach and departure asymptotes with specified intermediate orbit
Optimal finite-thrust transfer between planet approach and departure asymptotes with specified intermediate orbit
Willis, E. A., Jr.↗
Experimental evidence of departures from local thermodynamic equilibrium in arc plasmas at reduced pressure
Wall-stabilized arc for spectroscopic studies of departures from local thermodynamic equilibrium in argon and nitrogen plasmas at reduced pressures
Babrov, H. J.↗
The effect of constraints on optimum approach and departure paths for VTOL terminal operations
Approach and departure paths of VTOL aircraft under constraints of noise, traffic, safety, and economy for optimum trajectory
Hollister, W. M.↗
A multiple-impulse orbital departure technique for manned interplanetary missions.
Multiple impulse orbital departure window for manned interplanetary spacecraft, discussing launch delay, space assembly, refueling and checkout, etc
Wilson, S. W., Jr.↗
Neutral helium lines and departures from LTE in hot stars.
LTE departure calculated for He I in hot star model atmospheres for effects on populations of singlet and triplet states
Johnson, H. R.↗
Departures from LTE in the hydrogen lines of late B stars.
Atomic hydrogen departures from LTE computed for models of B star atmospheres, assuming detailed balance in hydrogen lines
Peterson, D. M.↗
Observational results concerning departures from LTE in late B stars
LTE departures in late B stars from measurements of Balmer and Paschen discontinuities
Smith, M. A.↗
Departure from free molecular flow during the boat evaporation of Permalloy
Permalloy evaporation rates from resistance heated W boat, revealing departure from free molecular flow
Carson, K. R.↗
Comparison of parallel and tandem staging of nuclear orbital launch stages for interplanetary departure
Nuclear orbital launch stages for interplanetary departure, comparing parallel and tandem spacecraft configurations
Mcadoo, S. F., Jr.↗
An earth departure technique for use in manned interplanetary missions using the NERVA engine
Multiorbit injection earth departure technique for optimal thrust-weight ratio in manned interplanetary missions using NERVA engine
Funk, J.↗
On the effect of departures from spherical symmetry upon the bistatic-radar occultation experiment.
The dependence of residual phase shifts upon the angle of inclination of the orbit for a model Martian atmosphere is examined. It is found that departures from spherical symmetry in the electron number density profiles result in changes of as much as an order of magnitude in the phase shifts of radio waves passing through the atmosphere and ionosphere of the model. These results confirm the earlier findings of Pirraglia and Gross (1970).
Mccormick, P. T.↗
Departures from hydrostatic equilibrium in the global distribution of thermospheric argon
This report describes the application of a three-dimensional two-component model to the distribution of argon in the upper atmosphere of the earth. The Cira (1972) model is used to specify the background gas density and the temperature as functions of altitude, latitude, local time, and day of the year. Emphasis is placed on examining the effects of departures from hydrostatic equilibrium on the argon density distribution. Such effects are found to be significant, producing a strong summer argon bulge. Comparisons of the model results with observational data are discussed.
Straus, J. M.↗
Equations for the angles of arrival and departure for multivariable root loci using frequency-domain methods
Frequency domain methods are used to study the angles of arrival and departure for multivariable root loci. Explicit equations are obtained. For a special class of poles and zeros, some simpler equations that are generalizations of the single input/single output equations are presented.
Yagle, A. E.↗
The cost of noise reduction for departure and arrival operations of commercial tilt rotor aircraft
The relationship between direct operating cost (DOC) and noise annoyance due to a departure and an arrival operation was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt rotor aircraft designs to meet various noise goals at minimum DOC. These vehicles ranged across the spectrum of possible noise levels from completely unconstrained to the quietest vehicles that could be designed within the study ground rules. Optimization parameters were varied to find the minimum DOC. This basic variation was then extended to different aircraft sizes and technology time frames.
Faulkner, H. B.↗
Equations for the angles of arrival and departure for multivariable root loci using frequency-domain methods
Frequency domain methods are developed to obtain explicit equations for the angles of arrival and departure for multivariable root loci. The techniques involve an evaluation of polynomials formulated within the transfer function matrix. The equations defined require simpler computations than the state-space results of Shaked (1976). A class of higher order poles and zeros is formulated in terms of simpler equations than Shaked's, and the equations are shown to be generalizations of the single-input-single-output root locus equations.
Yagle, A. E.↗