Computer calculated diffraction patterns.
Diffraction patterns calculated by computing two dimensional Fourier transform of aperture electric field
Andrews, H. C.↗
SEARCH · Search NASA
Results for “COMPUTER CALCULATIONS”
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.
Results of computer calculations for a simulated distribution of kidney cells
The results of computer calculations for a simulated distribution of kidney cells are given. The calculations were made for different values of electroosmotic flow, U sub o, and the ratio of sample diameter to channel diameter, R.
Micale, F. J.↗
Critical examination of equations for atmospheric number-density calculations - Computed values compared with observations
Critical examination of equations for atmospheric number-density calculations, and computed values compared with observations
ATMOSPHERIC DENSITY↗
Computer calculation of device, circuit, equipment, and system reliability.
A grouping into four classes is proposed for all reliability computations that are related to electronic equipment. Examples are presented of reliability computations in three of these four classes. Each of the three specific reliability tasks described was originally undertaken to satisfy an engineering need for reliability data. The form and interpretation of the print-out of the specific reliability computations is presented. The justification for the costs of these computations is indicated. The skills of the personnel used to conduct the analysis, the interfaces between the personnel, and the timing of the projects is discussed.
Crosby, D. R.↗
Mathematical model partitioning and packing for parallel computer calculation
This paper deals with the development of multiprocessor simulations from a serial set of ordinary differential equations describing a physical system. The identification of computational parallelism within the model equations is discussed. A technique is presented for identifying this parallelism and for partitioning the equations for parallel solution on a multiprocessor. Next, an algorithm which packs the equations into a minimum number of processors is described. The results of applying the packing algorithm to a turboshaft engine model are presented.
Arpasi, Dale J.↗
Use of a multichannel scaler and computing calculator to generate optical transfer functions
Multichannel scaler as interface between edge scan unit and calculator to generate optical transfer functions
Klingman, E. E.↗
Two-dimensional representations of axisymmetric fields for computer calculations
An accurate representation of axisymmetric fields has been devised by extending the method of ideal current loops to off-axis fields. It is assumed that the data to be simulated are available through measurements or through a solution of a boundary value problem. The method provides an algebraic expression for the fields throughout a two-dimensional region of interest and eliminates the need for the axial expansion formula in approximating off-axis fields. The use of Gaussian and other functions as alternatives to the coil function is proposed. Examples of the technique in simulating a periodic permanent magnet (PPM) focusing field are presented and compared with a Fourier analysis of the problem.
Stankiewicz, N.↗
Representative results in graphical form from computer production runs of the low-energy intranuclear-cascade calculation
Computer production runs of low energy intranuclear cascade calculation in graphical form
COMPUTER METHOD↗
Description of a computer program to calculate reacting supersonic internal flow fields with shock waves using viscous characteristics: Program manual and sample calculations
A computer program for calculating internal supersonic flow fields with chemical reactions and shock waves typical of supersonic combustion chambers with either wall or mid-stream injectors is described. The usefulness and limitations of the program are indicated. The program manual and listing are presented along with a sample calculation.
Cavalleri, R. J.↗
Computer program calculates sonic-boom pressure signatures
Computer programs calculate sonic boom characteristics of airplane configurations for a range of flight conditions. One program provides the area distribution, and another program provides the equivalent area due to lift. Program outputs are the complete near field /or far field/ pressure signature, including shock wave strengths and locations.
Craidon, C. B.↗
Computer program calculates velocities and streamlines in turbomachines
Computer program calculates the velocity distribution and streamlines over widely separated blades of turbomachines. It gives the solutions of a two dimensional, subsonic, compressible nonviscous flow problem for a rotating or stationary circular cascade of blades on a blade-to-blade surface of revolution.
Katsanis, T.↗
Computer program calculates transonic velocities in turbomachines
Computer program, TSONIC, combines velocity gradient and finite difference methods to obtain numerical solution for ideal, transonic, compressible flow for axial, radial, or mixed flow cascade of turbomachinery blades.
Katsanis, T.↗
Computer program calculates peripheral water injection cooling of axisymmetric subsonic diffuser
Digital computer program calculates the cooling effectiveness and flow characteristics resulting from the mixing of a cool liquid injectant /water/ with a hot sonic or subsonic gas stream /hydrogen/. The output of the program provides pressure, temperature, velocity, density, composition, and Mach number profiles at any location in the mixing duct.
Grey, J.↗
Computer program calculates and plots surface area and pore size distribution data
Computer program calculates surface area and pore size distribution of powders, metals, ceramics, and catalysts, and prints and plots the desired data directly. Surface area calculations are based on the gas adsorption technique of Brunauer, Emmett, and Teller, and pore size distribution calculations are based on the gas adsorption technique of Pierce.
Halpert, G.↗
Computer program calculates monotonic maximum likelihood estimates using method of reversals
FORTRAN 2 computer program calculates maximum estimates of a monotonic non-decreasing response function. The program uses the method of reversals algorithm which applies to the analysis of univariate or multivariate sensitivity experiments.
Alexander, M. J.↗
Computer circuit calculates cardiac output
Electronic circuitry automatically calculates cardiac output. This computer is used for basic research in physiology and as a diagnostic instrument by doctors.
Mc Cullough, C. E.↗
Exact Chord-Length Distribution For SEU Calculations
Computed rates of SEU's more accurate. Exact integral chord-length distribution derived for use in calculations of rates of single-event upsets (SEU's) (changes in logic states) caused by impingement of cosmic rays or other ionizing radiation on electronic logic circuits.
Buehler, Martin G.↗
Gaseous-fueled cavity reactors - Criticality calculations and analysis
Computer calculation of material, temperature, and dimensional variables on criticality and size of gaseous fueled cavity reactor for nuclear rocket propulsion
REACTOR TECHNOLOGY↗