Unified hardware/software design
Unified hardware/software design for computer systems optimization
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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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Feasibility study - On-line digital computer for Analytical Operations Division, Applied Technology Branch, Materials Analysis Section of Quality and Reliability Assurance Laboratory
On-line digital computer system for real time acquisition and processing of data at Materials Analysis Section of Quality and Reliability Assurance Laboratory
Newberry, M. H.↗
Optical devices - Lasers. A compilation
Laser applications in communications, industrial fabrication, and computer systems, and laser beam generation and control - technology utilization
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Computer performance analysis - Applications of accounting data
Computer system performance analysis using accounting data, with availability of data and methods of conditioning and reducing data
Watson, R. A.↗
Evaluation of an Adaptive Approach to Buffer Storage Allocation
Adaptive approach to dynamic allocation and release of buffer storage within computer systems
Crooke, S.↗
Fault-tolerant computer design for space shuttle
Application of redundancy techniques for improved computer system reliability
Goodman, I.↗
Adaptation of NASTRAN to the Analysis of the Viking Space Vehicle
NASTRAN adaptation to CDC 6600 computer system for analysis of Viking launch vehicle
Jones, T. C.↗
Characters - Universal architecture for LSI
LSI device standardized set for implementing digital computer systems of varying functional complexities
Erwin, F. D.↗
Techniques for improving reliability of computers
Modular design techniques improve methods of error detection, diagnosis, and recovery. Theoretical computer (MARCS (Modular Architecture for Reliable Computer Systems)) study deals with postulated and modeled technology indigenous to 1975-1980. Study developments are discussed.
Cater, W. C.↗
Mission and data operations IBM 360: User's guide
The purpose of this manual is to serve as an introduction to the M&DO computer systems and to supplement all other relevant documentation to be referenced. Because of its index structure, the user will be able to reference those sections pertinent to his needs. This is not a programming manual; where a user needs to learn a language or a system, it will be necessary to review the referenced documents.
Balakirsky, J.↗
Voter-comparator-switch optimization study
The design optimization and simulation effort of the voter-comparator switch (VCS) element are described. The VCS is an adaptive voter element that performs failure detection and reconfiguration function in a computer system designed to tolerate any three single failures in a fail operational fail operational fail safe manner. Detailed logic equations were developed and the design was evaluated and refined using a logic level fault simulator.
Jurison, J.↗
Preliminary software development for optical mirror figure control
The maintenance of accurate primary mirror figure in the face of environmental disturbances is the key to the achievement of diffraction-limited performance in a large space telescope. In order to develop the concepts of optical mirror figure control, an experimental program was initiated. A major component in this experiment will be an XDS Sigma 5.7 digital computer which will realize the control algorithm. A software package is described which realizes linear optimal, simplified linear, and iterative optimal control algorithms. The software, in addition, provides for interactive communication between the operator and the computer, and interaction between the computer and the experimental hardware elements. A brief description of a small hybrid computer system is also presented.
Mackinnon, D.↗
Implementation of radiation shielding calculation methods. Volume 1: Synopsis of methods and summary of results
The work performed in the following areas is summarized: (1) Analysis of Realistic nuclear-propelled vehicle was analyzed using the Marshall Space Flight Center computer code package. This code package includes one and two dimensional discrete ordinate transport, point kernel, and single scatter techniques, as well as cross section preparation and data processing codes, (2) Techniques were developed to improve the automated data transfer in the coupled computation method of the computer code package and improve the utilization of this code package on the Univac-1108 computer system. (3) The MSFC master data libraries were updated.
Capo, M. A.↗
A workload model and measures for computer performance evaluation
A generalized workload definition is presented which constructs measurable workloads of unit size from workload elements, called elementary processes. An elementary process makes almost exclusive use of one of the processors, CPU, I/O processor, etc., and is measured by the cost of its execution. Various kinds of user programs can be simulated by quantitative composition of elementary processes into a type. The character of the type is defined by the weights of its elementary processes and its structure by the amount and sequence of transitions between its elementary processes. A set of types is batched to a mix. Mixes of identical cost are considered as equivalent amounts of workload. These formalized descriptions of workloads allow investigators to compare the results of different studies quantitatively. Since workloads of different composition are assigned a unit of cost, these descriptions enable determination of cost effectiveness of different workloads on a machine. Subsequently performance parameters such as throughput rate, gain factor, internal and external delay factors are defined and used to demonstrate the effects of various workload attributes on the performance of a selected large scale computer system.
Kerner, H.↗
Automated cloud tracking using precisely aligned digital ATS pictures.
An interactive man-computer system, termed WINDCO, which was developed to measure cloud motions from pictures obtained by the ATS-I and ATS-III satellites, is described. The system will measure motions to at least three knots at moderate cost in a real-time environment. Accuracy could be improved by a factor of 4 by incorporating high-resolution visible SMS data.
Smith, E. A.↗
Computer program to determine pressure distributions and forces on blunt bodies of revolution
Program was written to include integration of surface pressure in order to obtain axial-force, normal-force, and pitching-moment coefficients. Program was written in CDC FORTRAN for the CDC-6600 computer system.
Jackson, C. M., Jr.↗
A universal functional object
A scheme is presented for realizing any function, combinational or sequential, in a single universal function scheme, termed the universal function object UF. This scheme is addressed to the problem of the proliferation of the number of parts (cards, chips) necessary for conventional implementation in an LSI technology of a computer system. The UF implementation will use about ten times more circuits than a conventional implementation regardless of the size of the design. The UF approach also includes general-purpose spares for failing circuits. The procedure could be used both at manufacture to increase yields, as well as to achieve automatic repair.
Roth, J. P.↗
The simultaneous quantitation of ten amino acids in soil extracts by mass fragmentography
A specific and sensitive method for the identification and simultaneous quantitation by mass fragmentography of ten of the amino acids present in soil was developed. The technique uses a computer driven quadrupole mass spectrometer and a commercial preparation of deuterated amino acids is used as internal standards for purposes of quantitation. The results obtained are comparable with those from an amino acid analyzer. In the quadrupole mass spectrometer-computer system up to 25 pre-selected ions may be monitored sequentially. This allows a maximum of 12 different amino acids (one specific ion in each of the undeuterated and deuterated amino acid spectra) to be quantitated. The method is relatively rapid (analysis time of approximately one hour) and is capable of the quantitation of nanogram quantities of amino acids.
Pereira, W. E.↗