A model of Meyer-Neldel rule
Meyer-Neldel rule interpretation of distribution width parameter dependence on activation energy annealing of defects in irradiated Si
Fang, P. H.↗
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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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Formulation of design rules for PCM telemetry frame synchronization Final report
Formulation of design rules for PCM telemetry frame synchronization
Source record↗
Techniques for ruling improved large diffraction gratings Final report, 1 Mar. 1966 - 31 Jan. 1971
Techniques for ruling improved large diffraction gratings
Harrison, G. R.↗
Sum rule functions
Sum rule functions for expressions of atomic or molecular quantum mechanical properties
Barnsley, M.↗
Decision rules for a two-channel deep-space telemetry system
Optimum and suboptimum decision rules for two- channel deep space telemetry system with modulation consisting of PM with two orthogonal phase functions
Butman, S.↗
Landmark navigation rule, a new navigation device.
Two new methods of landmark navigation were recently presented. The landmarks are assumed to be within sight of the navigator but with unknown positions. Both methods require computations which are time consuming when a computer is not available. This correspondence presents the concept of a new navigation device called 'landmark navigation rule' which eliminates all the computation effort required in both new methods. The device is simple in construction, lightweight, and consumes no power.
Hung, J. C.↗
Application of local linearization and the transonic equivalence rule to the flow about slender analytic bodies at Mach numbers near 1.0
The local linearization method for axisymmetric flow is combined with the transonic equivalence rule to calculate pressure distribution on slender bodies at free-stream Mach numbers from .8 to 1.2. This is an approximate solution to the transonic flow problem which yields results applicable during the preliminary design stages of a configuration development. The method can be used to determine the aerodynamic loads on parabolic arc bodies having either circular or elliptical cross sections. It is particularly useful in predicting pressure distributions and normal force distributions along the body at small angles of attack. The equations discussed may be extended to include wing-body combinations.
Tyson, R. W.↗
The compressibility rule for drag of airfoil noses
It is shown that the drag of any semi-infinite airfoil section in purely subsonic inviscid flow follows precisely the Prandtl-Glauert compressibility rule. The result for the parabola has application to leading edge corrections in thin airfoil theory.
Jones, R. T.↗
Extending radiative transfer models by use of Bayes rule
This paper presents a procedure that extends some existing radiative transfer modeling techniques to problems in atmospheric science where curvature and layering of the medium and dynamic range and angular resolution of the signal are important. Example problems include twilight and limb scan simulations. Techniques that are extended include successive orders of scattering, matrix operator, doubling, Gauss-Seidel iteration, discrete ordinates and spherical harmonics. The procedure for extending them is based on Bayes' rule from probability theory.
Whitney, C.↗
Integrated circuit process and design rule evaluation techniques
A technique is described for determining the applicability of a particular process for the fabrication of large-scale integrated (LSI) circuits. Test arrays were developed to isolate various critical processing steps in a fabrication sequence and a statistical evaluation of these steps was carried out that related yield or success in achieving a desired result to the number of times the results were attempted. It was found that, in general, yield is a sensitive function of physical dimensions as is the packing density of a particular array. It is, therefore, possible to generate an optimum set of physical dimensions or design rules that maximize the expected number of working circuits on a wafer.
Ipri, A. C.↗
Design rules for CMOS/SOS circuits
Report presents design rules for advanced-technology integrated circuits made by self-aligned silicongate complementary - metal - oxide - semiconductor/silicon-on-sapphir (CMOS/SOS) process.
Source record↗
A similarity rule for compressibility and sidewall-boundary-layer effects in two-dimensional wind tunnels
The effect of the sidewall boundary layer on flow in two-dimensional wind tunnels is determined. The small-disturbance and isentropic approximations are made, and the sidewall-boundary-layer dynamics are modeled with the von Karman momentum-integral equation. The effects of the edge-velocity-gradient term in the sidewall momentum integral, which is usually dominant near the model, and the compressibility term are shown to be similar. It is shown that the effect of sidewall suction around the model is not similar to two-dimensional flow. Comparisons with experiment are made to verify the similarity rule.
Barnwell, R. W.↗
STS-1 operational flight profile. Volume 1: Ground rules and constraints cycle 3.1.1
The ground rules and constraint to be used in generating the Space Transportation System 1 Flight operational flight profile are established. A brief summary of the flight is also presented.
Source record↗
An estimating rule for deep space station control room equipment energy costs
A rule is described which can be used to estimate power costs for new equipment under development, helping to reduce life-cycle costs and energy consumption by justifying design alternatives that are more costly, but more efficient.
Younger, H. C.↗
Development and evaluation of a prototype in-flight instrument flight rules (IFR) procedures trainer
An in-flight instrument flight rules (IFR) procedures trainer capable of providing simulated indications of instrument flight in a typical general aviation aircraft independent of ground based navigation aids was developed. The IFR navaid related instruments and circuits from an ATC 610J table top simulator were installed in a Cessna 172 aircraft and connected to its electrical power and pitot static systems. The benefits expected from this hybridization concept include increased safety by reducing the number of general aviation aircraft conducting IFR training flights in congested terminal areas, and reduced fuel use and instruction costs by lessening the need to fly to and from navaid equipped airports and by increased efficiency of the required in-flight training. Technical feasibility was demonstrated and the operational feasibility of the concept was evaluated. Results indicated that the in-flight simulator is an effective training device for teaching IFR procedural skills.
Aaron, J. B., Jr.↗
Double Linear Damage Rule for Fatigue Analysis
Double Linear Damage Rule (DLDR) method for use by structural designers to determine fatigue-crack-initiation life when structure subjected to unsteady, variable-amplitude cyclic loadings. Method calculates in advance of service how many loading cycles imposed on structural component before macroscopic crack initiates. Approach eventually used in design of high performance systems and incorporated into design handbooks and codes.
Halford, G.↗
Low-energy proton stopping power of N2, O2 and water vapor and deviations from Bragg's rule
A modified local plasma model, based on the works of Lindhard and Winther; and Bethe, Brown, and Walske, is established. The Gordon-Kim model for molecular electron density is used to calculate stopping power of N2, O2, and water vapor for protons of energy ranging from 40 keV to 2.5 MeV, resulting in good agreement with experimental data. Deviations from Bragg's rule are evaluated and are discussed under the present theoretical model.
Xu, Y. J.↗