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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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Computer computation of chemical equilibrium compositions, rocket performance, and chapman- jouguet detonations
Computer program for computation of chemical equilibrium compositions, rocket performance, and chapman-jouguet detonations
Computer program for investigating computer and operating system turn-around for problems employing multidimensional arrays
Computer program ETC improves computation of elastic transfer matrices of Legendre polynomials P/0/ and P/1/. Rather than carrying out a double integration numerically, one of the integrations is accomplished analytically and the numerical integration need only be carried out over one variable.
User manual for computer program 55VD for computation of minimum induced drag and load distribution of nonplanar wings
Computer program for optical thin film filter evaluation with computer and display
Reliable computation in computing systems designed from unreliable components, considering two models for component malfunctions
Digital correlation for computing sensitivity coefficients on iterative analog computer
Method of computation, organization, and applications of Modified transient analysis by computer
Computer program for predicting spacecraft window deformations and computing window induced angular deviations of light rays
Digital computer program for computing vibration characteristics of ring-stiffened orthotropic shells of revolution - users manual
Computational work and efficient computation on general purpose machines
Computer systems analysis and simulation studies on design, development, and management of complex computer systems
Computer program access protection by self-aware computing systems
A finite difference turbulent boundary layer computer program which allows for mass transfer wall cooling and equilibrium chemistry effects is presented. The program is capable of calculating laminar or turbulent boundary layer solutions for an arbitrary ideal gas or an equilibrium hydrogen oxygen system. Either two dimensional or axisymmetric geometric configurations may be considered. The equations are solved, in nondimension-alized physical coordinates, using the implicit Crank-Nicolson technique. The finite difference forms of the conservation of mass, momentum, total enthalpy and elements equations are linearized and uncoupled, thereby generating easily solvable tridiagonal sets of algebraic equations. A detailed description of the computer program, as well as a program user's manual is provided. Detailed descriptions of all boundary layer subroutines are included, as well as a section defining all program symbols of principal importance. Instructions are then given for preparing card input to the program and for interpreting the printed output. Finally, two sample cases are included to illustrate the use of the program.
This paper is concerned with the computer costs for both the steady-state and transient thermal responses of large-scale integrated circuits (LSI) when metal is present within the substrate. For the more cost-sensitive transient case, an extrapolation technique for computer time savings is compared with the accuracy loss in this study. This approach could be useful for design-cost planning.
The mathematical modeling and programming of a complete simulation program for a space station computer-steered high gain antenna are described. The program provides for reading input data cards, numerically integrating up to 50 first order differential equations, and monitoring up to 48 variables on printed output and on plots. The program system consists of a high gain antenna, an antenna gimbal control system, an on board computer, and the environment in which all are to operate.
An analysis of current computer usage by major water resources users was made to determine the trends of usage and costs for the principal hydrologic users/models. The laws and empirical relationships governing the growth of the data processing loads were described and applied to project the future data loads. Data loads for ERTS CCT image processing were computed and projected through the 1985 era. The analysis showns significant impact due to the utilization and processing of ERTS CCT's data.