Monte Carlo direct simulation technique user's manual
User manual for Monte Carlo direct simulation technique
Vogenitz, F. W.↗
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Elevation-relief ratio, hypsometric integral, and geomorphic area-altitude analysis.
Mathematical proof establishes identity of hypsometric integral and elevation-relief ratio, two quantitative topographic descriptors developed independently of one another for entirely different purposes. Operationally, values of both measures are in excellent agreement for arbitrarily bounded topographic samples, as well as for low-order fluvial watersheds. By using a point-sampling technique rather than planimetry, elevation-relief ratio (defined as mean elevation minus minimum elevation divided by relief) is calculated manually in about a third of the time required for the hypsometric integral.
Pike, R. J.↗
Computer-automated ultrasonic inspection system
Computer system automatically analyzes and records ultrasonic weld inspection data. Unit can be operated in three modes: manual, automatic, and computer-controlled.
Dunmyer, D.↗
Programmable Pulse Generator
New pulse generator programmed to produce pulses from several ports at different pulse lengths and intervals and virtually any combination and sequence. Unit contains a 256-word-by-16-bit memory loaded with instructions either manually or by computer. Once loaded, unit operates independently of computer.
Rhim, W. K.↗
Predictor symbology in computer-generated perspective displays
An advanced display format for the four dimensional commercial aircraft approach-to-landing is evaluated. The desired curved and descending approach path is presented by displaying the perspective image of a tunnel. Attention is focussed on the predictor symbology, superimposed on the tunnel image. A perspective three dimensional predictor symbol, providing future position, as well as future attitude information, is compared with a flat two dimensional version, which only provides the future position. In addition to this, the predictor displays the actual airspeed as well as the desired airspeed, prescribed by the four dimensional path. Results show that the three dimensional predictor symbol outperforms the two dimensional predictor in following the trajectory in a moderate-to-heavy turbulent environment, which is manifested in accurate manual true airspeed control was obtained without affecting the main task performance significantly.
Grunwald, A. J.↗
User's manual for airfoil flow field computer code SRAIR
A two dimensional unsteady Navier-Stokes calculation procedure with specific application to the isolated airfoil problem is presented. The procedure solves the full, ensemble averaged Navier-Stokes equations with turbulence represented by a mixing length model. The equations are solved in a general nonorthogonal coordinate system which is obtained via an external source. Specific Cartesian locations of grid points are required as input for this code. The method of solution is based upon the Briley-McDonald LBI procedure. The manual discusses the analysis, flow of the program, control steam, input and output.
Shamroth, S. J.↗
Linear and nonlinear analysis of shells of revolution with asymmetrical stiffness properties user's manual
Computer programs for elastic analysis of shells of revolution under arbitrary loading with asymmetrical stiffness properties
De Andrade, J. C.↗
Internal visual workmanship standard for microelectronic devices /NASA STD XX-2/ and training manual, volume 1
Internal visual workmanship standards for monolithic microelectronic devices - criteria definitions
De Miranda, W. R. R.↗
A study of potential roles of supersonic transport crews and some implications for the flight deck. Volume II - Feasible automated and manual implementation concepts for SST activities and functions, Final report
Automated and manual implementation concepts for supersonic transport activities and implications for flight and ground crews
AIRCRAFT INSTRUMENTATION↗
Two dimensional manual control systems with separate displays
Two dimensional manual control systems with separate displays - prediction of human controller behavior in complex multivariable systems
Elkind, J. I.↗
A study of low-cost weldments in pressure vessels made up of HY-150 steel plates Final report, 6 Jun. 1967 - 31 Oct. 1968
Low cost automated and manual welding techniques for pressure vessels made of HY-150 steel plates
Barclay, D. L.↗
An investigation of the high speed turbulent boundary layer with heat transfer and arbitrary pressure gradient. Part 3 - Computer program manual
Computer program for determining properties of high speed turbulent boundary layer with heat transfer and arbitrary pressure gradient
Boccio, J.↗
Study of Thermal Conductivity Requirements. Volume 2: Multilayer Insulation Data Manual
Empirical analysis of thermophysical properties of multilayer insulation composite materials for cryogenic storage equipment - Vol. 2
O'Neill, M. J.↗
Probe Array for Testing Printed-Circuit Substrates
Array of tiny probes tests complex printed circuit boards prior to mounting of microcircuit chips and other active and passive components. Insertion and alignment of board, performance of entire computer-controlled test, and printing of results requires about a minute; performed manually same tests require as much as 30 hours.
Roison, A.↗
Coniferous forest classification and inventory using Landsat and digital terrain data
Machine-processing techniques were used in a Forest Classification and Inventory System (FOCIS) procedure to extract and process tonal, textural, and terrain information from registered Landsat multispectral and digital terrain data. Using FOCIS as a basis for stratified sampling, the softwood timber volumes of the Klamath National Forest and Eldorado National Forest were estimated within standard errors of 4.8 and 4.0 percent, respectively. The accuracy of these large-area inventories is comparable to the accuracy yielded by use of conventional timber inventory methods, but, because of automation, the FOCIS inventories are more rapid (9-12 months compared to 2-3 years for conventional manual photointerpretation, map compilation and drafting, field sampling, and data processing) and are less costly.
Franklin, J.↗
System Turns SAR Images Into Maps
Postprocessing system for synthetic-aperture radar (SAR) transforms raw images from natural rotated and distorted SAR reference frame into geocoded images. Images automatically corrected to remove slant-range nonlinearities and Doppler skew. Produces multiple-frame mosaics for large-scale mapping. Does not require tedious manual registration of representative "tie" points in raw SAR imagery with known locations on Earth.
Curlander, J. C.↗
Computation of the tip vortex flowfield for advanced aircraft propellers
The tip vortex flowfield plays a significant role in the performance of advanced aircraft propellers. The flowfield in the tip region is complex, three-dimensional and viscous with large secondary velocities. An analysis is presented using an approximate set of equations which contains the physics required by the tip vortex flowfield, but which does not require the resources of the full Navier-Stokes equations. A computer code was developed to predict the tip vortex flowfield of advanced aircraft propellers. A grid generation package was developed to allow specification of a variety of advanced aircraft propeller shapes. Calculations of the tip vortex generation on an SR3 type blade at high Reynolds numbers were made using this code and a parametric study was performed to show the effect of tip thickness on tip vortex intensity. In addition, calculations of the tip vortex generation on a NACA 0012 type blade were made, including the flowfield downstream of the blade trailing edge. Comparison of flowfield calculations with experimental data from an F4 blade was made. A user's manual was also prepared for the computer code (NASA CR-182178).
Tsai, Tommy M.↗
A high performance two degree-of-freedom kinesthetic interface
This summary focuses on the kinesthetic interface of a virtual environment system that was developed at the Newman Laboratory for Biomechanics and Human Rehabilitation at M.I.T. for the study of manual control in both motorically impaired and able-bodied individuals.
Adelstein, Bernard D.↗