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  • Other Sources  (469)
  • COMPUTERS  (469)
  • 2015-2019
  • 1970-1974  (467)
  • 1955-1959  (2)
  • 1945-1949
  • 2015
  • 1973  (184)
  • 1971  (283)
  • 1958  (2)
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  • Other Sources  (469)
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  • 2015-2019
  • 1970-1974  (467)
  • 1955-1959  (2)
  • 1945-1949
Year
  • 1
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    IBM 360/75-Univac 1108 computer interface (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Serial synchronous communication method for short distances without using modems
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 110-112
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  • 2
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    Diagnostics for the Mark 3A central processing system - IBM 360/75 computer on- line test routines (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Real time on-line diagnostics routines developed for IBM 360/75 computers
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 103-106
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  • 3
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    IBM 360/75 computer time interface (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Modified IBM 360/75 computer time interface
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 107-109
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  • 4
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    SFOF Mark 3A central processing system model development (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Performance evaluation of two real time operating systems using simulation models
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 95-102
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  • 5
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    Inbound high speed and wideband data synchronizers (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Mark 3A computer configuration of inbound high speed and wideband data synchronizers
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 93-94
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  • 6
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    Mark 3A simulation center EMR 6050-Univac 1108 computer interface (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Mark 3A simulation center EMR 6050-Univac 1108 computer interface
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 88-92
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  • 7
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    Concatenation of short constraint length convolutional codes (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Viterbi algorithm for decoding convolutional codes for space channel application
    Keywords: COMPUTERS
    Type: THE DEEP SPACE NETWORK, VOL. 1 15 FEB. 1971; P 46-51
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  • 8
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    Investigation of fluctuations in angular velocity in magnetic memory devices (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: The fluctuations in the angular velocity of individual assemblies of a precision mechanical system were analyzed. The system was composed of an electric motor and a magnetic drum which were connected by a flexible coupling. A dynamic model was constructed which took into account the absence of torsion in the rigid shafts of the electric motor drive rotor and the magnetic drum. The motion was described by Lagrange differential equations of the second kind. Curves are developed to show the nature of amplitude fluctuation of the magnetic drum angular velocity at a specific excitation frequency. Additional curves show the amplitudes of fluctuation of the magnetic drum angular velocity compared to the quantity of damping at specific frequencies.
    Keywords: COMPUTERS
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 283-284
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  • 9
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    Industrial realization of a direct Fourier transform in automated experimental data processing systems (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-28
    Description: Fourier processing of automatic signals transforms direct current voltage into a numerical form through bandpass filtration in time-pulse multiplying devices. It is shown that the ratio of the interference energy to the useful signal energy is inversely proportional to the square of the product of the depth of the width modulation and the ratio of the time constant averaging to the cross-multiplied signals.
    Keywords: COMPUTERS
    Type: Cybernetic Diagnostics of Mech. Systems with Vibro-acoustic Phenomena (NASA-TT-F-14899); p 13-16
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  • 10
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    SOLAR TRACKING SYSTEM (1958)
    In:  CASI
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    Publication Date: 2006-03-16
    Keywords: COMPUTERS
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  • 11
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    Fault tolerant sequential machines (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Memory cell fault tolerant sequential machine synthesis, considering masking feasibility and lower bounds on minimum redundancy
    Keywords: COMPUTERS
    Type: ; - ASTRONOMY 1969- TE
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  • 12
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    A computational algorithm for sequential estimation (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Modular component computational algorithm for sequential least squares estimation /filtering/ with process noise for straightforward computer code conversion
    Keywords: COMPUTERS
    Type: ; HYSICAL PROCESSES IN
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  • 13
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    Digital processing of the Mariner 6 and 7 pictures (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Digital computer techniques for Mars surface imagery systematic video data distortions quantification and correction onboard Mariner 6 and 7
    Keywords: COMPUTERS
    Type: ; SEARCH(
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  • 14
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    On reliability modeling and analysis of ultrareliable fault-tolerant digital systems. (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The processes of protective redundancy, namely, standby replacement (SR) redundancy and hybrid redundancy (a combination of SR and multiple-line voting redundancy), find application in the architecture of fault-tolerant digital computers and enable them to be ultrareliable and self-repairing. The claims to ultrareliability lead to the challenge of quantitatively evaluating and assigning a value to the probability of survival as a function of the mission durations intended. This note presents various mathematical models, and derives and displays quantitative evaluations of system reliability as a function of various mission parameters of interest to the system designer.
    Keywords: COMPUTERS
    Type: IEEE Transactions on Computers; C-20; Nov. 197
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  • 15
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    Arithmetic error codes - Cost and effectiveness studies for application in digital system design. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The application of error-detecting or error-correcting codes in digital computer design requires studies of cost and effectiveness tradeoffs to supplement the knowledge of their theoretical properties. General criteria for cost and effectiveness studies of error codes are developed, and results are presented for arithmetic error codes with the low-cost check modulus 2 super a - 1. Both separate (residue) and nonseparate (AN) codes are considered. The class of multiple arithmetic error codes is developed as an extension of low-cost single codes.
    Keywords: COMPUTERS
    Type: IEEE Transactions on Computers; C-20; Nov. 197
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  • 16
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    GCF DSS communications equipment subsystem high-speed data assembly (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: GCF DSS communications equipment subsystem high-speed data assembly for data conversion to suitable form for transmission
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 138-143
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  • 17
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    GCF high-speed data system design and implementation for 1971 - 1972 (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: GCF high-speed data system design and implementation for 1971-1972, including doubled data transmission, block demultiplexing, and positive labeling of error-free blocks
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 133-137
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  • 18
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    The i/sq root of t/ computer program, appendix 2 (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Computer program description for applying pulses to electrochemical system and yielding current time plots as output
    Keywords: COMPUTERS
    Type: CTROCHEM. STUDIES IN ALUMINUM CHLORIDE MELTS 1971; P 81-96
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  • 19
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    A note on some efficient estimates of the noise variance for first-order Reed-Muller codes (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Noise variance maximum likelihood estimate based on order statistics for first order Reed-Muller code transmission over zero-mean white Gaussian noise channel
    Keywords: COMPUTERS
    Type: ; ANSPORTURI AUTO, NAV
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  • 20
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    A semiconductor-ferroelectric memory device (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Monolithic optically written and electrically read semiconductor-ferroelectric memory device employing single crystal barium titanate
    Keywords: COMPUTERS
    Type: ; TROPHYSICAL JOURNAL
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  • 21
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    High-speed data system performance and error statistics at 4800 bps (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: GCF high-speed data system performance and error statistics at 4800 bps
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 154-159
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  • 22
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    Holographic data processing (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Holography utilization to data processing, discussing factors affecting recording and matched filters creation for pattern recognition
    Keywords: COMPUTERS
    Type: ; ADEMIE DES SCIENCES
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  • 23
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    The fundamentals of coherent optical data processing. II (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Coherent optical data processing techniques, discussing diffraction phenomena, spectral analysis and holography
    Keywords: COMPUTERS
    Type: ; YAL SOCIETY (
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  • 24
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    The fundamentals of coherent optical data processing. I (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Coherent optical data processing principles, discussing lens, diffraction, focused wave front, intensity vs amplitude and spectrum analyzer
    Keywords: COMPUTERS
    Type: ; YAL SOCIETY (
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  • 25
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    Data decoder assembly (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Data decoder assembly for Pioneer F and G space probes
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 170-177
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  • 26
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    Mark 3A simulation center diagnostic software (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Mark 3A simulation center diagnostic software for EMR 6050-Univac 1108 interface
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 129-132
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  • 27
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    Computer-controllable phase shifter (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Voltage variable phase shifter having linear voltage-to-phase characteristics
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 167-169
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  • 28
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    GCF area communications terminal subsystem high-speed data regeneration assembly (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: GCF area communications terminal subsystem high-speed data regeneration assembly for routing and conditioning all communications entering and leaving
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4 p151-153 (SEE 71-34118 21-07)
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  • 29
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    GCF SFOF communications terminal subsystem high-speed data assembly (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Capabilities and 4800-bps data circuits of GCF SFOF communications terminal subsystem high-speed data assembly
    Keywords: COMPUTERS
    Type: The Deep Space Network, Vol. 4; p 144-150
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  • 30
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    Investigation of data compression techniques (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Data compression techniques for space flight data transmission systems using Telemetry Redundancy Analyzer
    Keywords: COMPUTERS
    Type: INSTRUMENTATION AND COMMUN. RES. AT MSFC, VOL. 4 MAY 1971; P 19-30
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  • 31
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    The STAR /self-testing and repairing/ computer - An investigation of the theory and practice of fault-tolerant computer design. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: This paper presents the results obtained in a continuing investigation of fault-tolerant computing which is being conducted at the Jet Propulsion Laboratory. Initial studies led to the decision to design and construct an experimental computer with dynamic (standby) redundancy, including replaceable subsystems and a program rollback provision to eliminate transient errors. This system, called the STAR computer, began operation in 1969. The following aspects of the STAR system are described: architecture, reliability analysis, software, automatic maintenance of peripheral systems, and adaptation to serve as the central computer of an outer-planet exploration spacecraft.
    Keywords: COMPUTERS
    Type: IEEE Transactions on Computers; C-20; Nov. 197
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  • 32
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    Locatability of faults in combinational networks. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: A formal model for the study of reliable combinational networks is introduced and used to determine network properties conducive to the location of faults. The usual concept of fault location is generalized to be an interval on the partially ordered set of subsets of network nodes that classifies nodes into three disjoint sets: a faulty set, a fault-free set, and an indeterminate set. After developing basic properties of locatable faults, necessary and sufficient conditions for a fault to be locatable in an arbitrary network are stated and proven.
    Keywords: COMPUTERS
    Type: IEEE Transactions on Computers; C-20; Nov. 197
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  • 33
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    Reachable sets for linear dynamical systems. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The properties of reachable sets for linear dynamical systems for specified control sets are discussed. Iterative procedures for determining numerical approximations of the reachable set are suggested and methods of obtaining an admissible control function which transfers an initial state to as near a prescribed target as possible is described. The problem of reachability with multiple control constraints is discussed and certain aspects of reachability for time-invariant systems with adjustable parameters is considered.
    Keywords: COMPUTERS
    Type: Information and Control; 19; Nov. 197
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  • 34
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    Automatic problem formulation using the metric properties of space. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The use of metric tensors as inputs to computer programs designed to formulate engineering and scientific problems is considered as an alternative to the use of coordinate transformation equations.
    Keywords: COMPUTERS
    Type: Franklin Institute; vol. 292
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  • 35
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    Information Management System for the California State Water Resources Control Board (SWRCB) (1973)
    In:  CASI
    Details
    Publication Date: 2016-03-01
    Description: A study was made to establish the requirements for an integrated state-wide information management system for water quality control and water quality rights for the State of California. The data sources and end requirements were analyzed for the data collected and used by the numerous agencies, both State and Federal, as well as the nine Regional Boards under the jurisdiction of the State Board. The report details the data interfaces and outlines the system design. A program plan and statement of work for implementation of the project is included.
    Keywords: COMPUTERS
    Type: JPL Quart. Tech. Rev.; Vol. 2; No. 4; p 53-61
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  • 36
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    NASTRAN Plotting Capabilities (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-04
    Description: NASTRAN static, modal, and transient analyses plotting techniques with delta wing examples
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users Experiences; p 709-735
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  • 37
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    New Element Definition Capability for NASTRAN (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: New element preprocessor for NASTRAN programming to generate tables and routines for new elements
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users Experiences; p 633-636
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  • 38
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    A Special NASTRAN Program for Input Checking and Undeformed Structure Plotting (1971)
    In:  CASI
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    Publication Date: 2014-09-03
    Description: NASTRAN program for input data checkout and undeformed structure plotting
    Keywords: COMPUTERS
    Type: NASTRAN: Users Experiences; p 559-568
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  • 39
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    The NASA computer aided design and test system (1973)
    In:  CASI
    Details
    Publication Date: 2012-05-22
    Description: A family of computer programs facilitating the design, layout, evaluation, and testing of digital electronic circuitry is described. CADAT (computer aided design and test system) is intended for use by NASA and its contractors and is aimed predominantly at providing cost effective microelectronic subsystems based on custom designed metal oxide semiconductor (MOS) large scale integrated circuits (LSIC's). CADAT software can be easily adopted by installations with a wide variety of computer hardware configurations. Its structure permits ease of update to more powerful component programs and to newly emerging LSIC technologies. The components of the CADAT system are described stressing the interaction of programs rather than detail of coding or algorithms. The CADAT system provides computer aids to derive and document the design intent, includes powerful automatic layout software, permits detailed geometry checks and performance simulation based on mask data, and furnishes test pattern sequences for hardware testing.
    Keywords: COMPUTERS
    Type: AGARD Computer Aided Design for Electron. Circuits; 13 p
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  • 40
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    Enhancement of spectra by digital convolution. (1973)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: A method is presented for convolving digitally scanned spectra by means of computerized filtering. This method is an effective tool for improving the quality of noisy spectra and for deconvolving high-quality spectra by removing instrument signature.
    Keywords: COMPUTERS
    Type: Astronomical Journal; 78; Feb. 197
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  • 41
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    Dynamic programming as applied to feature subset selection in a pattern recognition system. (1973)
    In:  Other Sources
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    Publication Date: 2011-08-16
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  • 42
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    The development and use of a modern data bank (1973)
    In:  CASI
    Details
    Publication Date: 2012-05-23
    Description: The modern data bank emphasizes immediate access by a user community which may be large in number, widespread, and having varied needs. Electronic computers have been found very useful in the processing of stored information. The key to the design of a data bank is the optimum mix of human intellectual effort and mechanized processing. The elements of the NASA data bank are presented as one approach to the many trade-off decisions involved in the development of a data bank and integrated information system.
    Keywords: COMPUTERS
    Type: AGARD Governmental Assistance for Tech. Inform. in Ind. and Simple Mechanization for Small Inform. Centres; 8 p
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  • 43
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    Optimum spaceborne computer system design by simulation (1973)
    In:  CASI
    Details
    Publication Date: 2012-05-23
    Description: A deterministic simulator is described which models the Automatically Reconfigurable Modular Multiprocessor System (ARMMS), a candidate computer system for future manned and unmanned space missions. Its use as a tool to study and determine the minimum computer system configuration necessary to satisfy the on-board computational requirements of a typical mission is presented. The paper describes how the computer system configuration is determined in order to satisfy the data processing demand of the various shuttle booster subsytems. The configuration which is developed as a result of studies with the simulator is optimal with respect to the efficient use of computer system resources.
    Keywords: COMPUTERS
    Type: AGARD Automation in Manned Aerospace Systems; 12 p
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  • 44
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    Misalignment estimation software system (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A system of computer software, spacecraft, and ground system activity is described that enables spacecraft startrackers and inertial assemblies to be aligned and calibrated from the ground after the spacecraft has achieved orbit. The system generates in the uplink flow an exercise designed to render misalignments visible, and sends the exercise to the spacecraft where the spacecraft inserts the misalignment into the information in the form of attitude sensor error. The information is downlinked for processing into misalignment estimates to be used for correcting spacecraft model at data base.
    Keywords: COMPUTERS
    Type: Significant Accomplishments in Technol., 1972; p 136-139
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  • 45
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    Computer program for the automated attendance accounting system (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The automated attendance accounting system (AAAS) was developed under the auspices of the Space Technology Applications Program. The task is basically the adaptation of a small digital computer, coupled with specially developed pushbutton terminals located in school classrooms and offices for the purpose of taking daily attendance, maintaining complete attendance records, and producing partial and summary reports. Especially developed for high schools, the system is intended to relieve both teachers and office personnel from the time-consuming and dreary task of recording and analyzing the myriad classroom attendance data collected throughout the semester. In addition, since many school district budgets are related to student attendance, the increase in accounting accuracy is expected to augment district income. A major component of this system is the real-time AAAS software system, which is described.
    Keywords: COMPUTERS
    Type: JPL Quart. Tech. Rev., Vol. 1, No. 3; p 27-32
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    Self-Test Techniques for Redundant Data Management Systems (1971)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Characteristics of Space shuttle data management system for data transmission and service for avionics equipment and other subsystems
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 309-328
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    A simplified modal plotting technique for the representation of complex structural models (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A plotting method has been developed that has proven to be useful in rapidly defining the mode shapes of a complex spacecraft. The reduction of the complex model to a simple stick plot is accomplished by augmenting the existing NASTRAN plot package with constrained plot elements. Both the existing NASTRAN modal plot package and the stick plots of a representative mode are presented for comparison. The NASTRAN plot package provides the capability of generating modal deformations (mode shapes) resulting from real eigenvalue analysis. These modal deformations of the structural model may be displayed in the deformed shape either alone or superimposed on the undeformed shape. Another available method of displaying the modal deformations is by means of displacement vectors at the grid points
    Keywords: COMPUTERS
    Type: NASTRAN: Users' Experiences; p 697-705
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    Implementation experiences of NASTRAN on CDC CYBER 74 SCOPE 3.4 operating system (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The implementation of the NASTRAN system on the CDC CYBER 74 SCOPE 3.4 Operating System is described. The flexibility of the NASTRAN system made it possible to accomplish the change with no major problems. Various sizes of benchmark and test problems, ranging from two hours to less than one minute CP time were run on the CDC CYBER SCOPE 3.3, Univac EXEC-8, and CDC CYBER SCOPE 3.4. The NASTRAN installation deck is provided.
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users' Experiences; p 627-631
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    NASTRAN distribution through COSMIC (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The NASTRAN program package is one of the most important in terms of size and use in the COSMIC inventory at the University of Georgia. A brief history of the COSMIC facility as it relates to the NASTRAN program package is presented, followed by a discussion of the NASTRAN disseminations. COSMIC, which is the acronym for the Computer Software Management and Information Center, is operated by the University of Georgia's Computer Center under contract to NASA. The purpose of COSMIC is to make available to the public the computer software and documentation developed as part of the NASA program. It is, perhaps, best described as a clearinghouse for the NASA-sponsored computer software, although the functions specified under the contract go much further than simply duplicating the programs and documentation for distribution. A sizeable portion of the workscope involves screening the programs to insure that they are free of syntax errors, that all necessary subroutines are present, and that the documentation includes sufficiently detailed instructions to allow purchasers to install and operate the program or system.
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users' Experiences; p 569-571
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    Two dimensional digital computer (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The development of a two dimensional data processing system is reported that extracts data from optical images by performing multiple logical operations simultaneously. A two dimensional logical circuits is described that contains a liquid crystal negation element and an OR-ing element. The negation element performs 20,000 negations simultaneously, and the OR does 20,000 OR operations simultaneously.
    Keywords: COMPUTERS
    Type: Significant Accomplishments in Technol., 1972; p 42-44
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    Computer assisted interactive resource scheduling system (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A computer system is reported that effectively schedules complex mission support by processing spacecraft requirements, station capabilities, and ephemeris data in teletype format ready for transmission.
    Keywords: COMPUTERS
    Type: Significant Accomplishments in Technol., 1972; p 143-146
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    NASTRAN postprocessor program for transient response to input accelerations (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The description of a transient analysis program for computing structural responses to input base accelerations is presented. A hybrid modal formulation is used and a procedure is demonstrated for generating and writing all modal input data on user tapes via NASTRAN. Use of several new Level 15 modules is illustrated along with a problem associated with reading the postprocessor program input from a user tape. An example application of the program is presented for the analysis of a spacecraft subjected to accelerations initiated by thrust transients. Experience with the program has indicated it to be very efficient and economical because of its simplicity and small central memory storage requirements.
    Keywords: COMPUTERS
    Type: NASTRAN: Users' Experiences; p 707-734
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    A method for transferring NASTRAN data between dissimilar computers (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The NASTRAN computer program is capable of executing on three different types of computers: (1) the CDC 6000 series, (2) the IBM 360-370 series, and (3) the Univac 1100 series. A typical activity requiring transfer of data between dissimilar computers is the analysis of a large structure such as the space shuttle by substructuring. Models of portions of the vehicle which have been analyzed by subcontractors using their computers must be integrated into a model of the complete structure by the prime contractor on his computer. Presently the transfer of NASTRAN matrices or tables between two different types of computers is accomplished by punched cards or a magnetic tape containing card images. These methods of data transfer do not satisfy the requirements for intercomputer data transfer associated with a substructuring activity. To provide a more satisfactory transfer of data, two new programs, RDUSER and WRTUSER, were created.
    Keywords: COMPUTERS
    Type: NASTRAN: Users' Experiences; p 633-639
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  • 54
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    Onboard data storage for spacecraft (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Analysis of bulk storage data requirements and methods for visual display of information on space shuttle display devices
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf, Vol. 3; p 251-288
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  • 55
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    HAL, a compiler language for shuttle (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Development of computer programming language for use on space shuttle
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 191-220
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  • 56
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    Synchronous executive and bus control software for redundant data management systems (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Development and characteristics of executive software for application to space shuttle data management system
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 179-190
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  • 57
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    Software development and verification technology (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Procedures for development and verification of complex software used in space shuttle data management system
    Keywords: COMPUTERS
    Type: Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 141-178
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  • 58
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    Self-sequencing data bus techniques for space shuttle (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Application of self-sequencing data bus techniques for space shuttle data management system
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 111-140
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    Data bus to serviced equipment and sensor interface (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Development and application of data bus techniques for space shuttle data management systems
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space shuttle Integrated Electron. Conf., Vol. 3; p 87-110
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  • 60
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    Data bus concepts for the space shuttle (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Characteristics and advanages of data bus to facilitate data handling process on space shuttles
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 71-86
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  • 61
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    Fault-tolerant computer design for space shuttle (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Application of redundancy techniques for improved computer system reliability
    Keywords: COMPUTERS
    Type: NASA. Manned Spacecraft Center Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 27-46
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    Configuration alternatives for data bus subsystem interface units (1971)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Design and development of subsystem interface unit, bus control unit, and supporting equipment for space shuttle data processing equipment
    Keywords: COMPUTERS
    Type: Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3; p 47-70
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    Modular spaceborne processors (1971)
    In:  Other Sources
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    Publication Date: 2016-06-07
    Description: Design, development, and characteristics of modular spaceborne data processors for space shuttle applications
    Keywords: COMPUTERS
    Type: Proc. of the Space Shuttle Integrated Electron. Conf., Vol. 3 3-26 (SEE 71-35052 21-31)
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  • 64
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    NASTRAN Experiences of Fort Worth Operation, Convair Aerospace Division of General Dynamics (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: Accuracy, usability, and economics of using NASTRAN program
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users Experiences; p 553-558
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  • 65
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    Data Management Requirements for Large Problems (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: Comparing and integrating NASTRAN with other finite element computer programs
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users Experiences; p 533-550
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  • 66
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    An Interactive Computer Graphics Program for NASTRAN (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: On-line computer graphics program applied to NASTRAN for checking finite element models prior to structural analysis
    Keywords: COMPUTERS
    Type: NASA. Langely Res. Center NASTRAN: Users Experiences; p 659-667
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    NASTRAN User Interfaces: Automated Input Innovations (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: Automatic generation of finite element input, input transparency, and symbolic parameters for NASTRAN simplification and error reduction
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users Experiences; p 669-678
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    Procedure for Efficiently Generating, Checking, and Displaying NASTRAN Input and Output Data for Analysis of Aerospace Vehicle Structures (1971)
    In:  CASI
    Details
    Publication Date: 2014-09-03
    Description: Auxiliary computer routines for generating, checking, and displaying NASTRAN input and output data for analysis of aerospace vehicle structures
    Keywords: COMPUTERS
    Type: NASTRAN: Users Experiences; p 679-696
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    NASTRAN data generation of helicopter fuselages using interactive graphics (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The development and implementation of a preprocessor system for the finite element analysis of helicopter fuselages is described. The system utilizes interactive graphics for the generation, display, and editing of NASTRAN data for fuselage models. It is operated from an IBM 2250 cathode ray tube (CRT) console driven by an IBM 370/145 computer. Real time interaction plus automatic data generation reduces the nominal 6 to 10 week time for manual generation and checking of data to a few days. The interactive graphics system consists of a series of satellite programs operated from a central NASTRAN Systems Monitor. Fuselage structural models including the outer shell and internal structure may be rapidly generated. All numbering systems are automatically assigned. Hard copy plots of the model labeled with GRID or elements ID's are also available. General purpose programs for displaying and editing NASTRAN data are included in the system. Utilization of the NASTRAN interactive graphics system has made possible the multiple finite element analysis of complex helicopter fuselage structures within design schedules.
    Keywords: COMPUTERS
    Type: NASA. Langley Res. Center NASTRAN: Users' Experiences; p 661-678
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    An interactive NASTRAN preprocessor (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A Langley Research Center version of NASTRAN Level 15.1.0 designed to provide the analyst with an added tool for debugging massive NASTRAN input data is described. The program checks all NASTRAN input data cards and displays on a CRT the graphic representation of the undeformed structure. In addition, the program permits the display and alteration of input data and allows reexecution without physically resubmitting the job. Core requirements on the CDC 6000 computer are approximately 77,000 octal words of central memory.
    Keywords: COMPUTERS
    Type: NASTRAN: Users' Experiences; p 641-659
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  • 71
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    The onboard processor on OAO-3 (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The onboard data processor for OAO 3 flight applications executes instructions at the rate of 2 1/2 billion per day. The computer commands, processes data, and controls telemetry subsystem programs onboard the spacecraft.
    Keywords: COMPUTERS
    Type: Significant Accomplishments in Technol., 1972; p 28-31
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    The data processor from the small scientific satellite (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A reprogrammable data system aboard a small scientific satellite is described that samples and processes magnetospheric measurements for transmission to the ground. The lightweight configuration of the data system is made up of the program memory, data storage, input/output module, and a central processing unit. The system is designed for multiple missions.
    Keywords: COMPUTERS
    Type: Significant Accomplishments in Technol., 1972; p 25-27
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    A FLIGHT STUDY OF THE EFFECTS OF NOISE FILTERING IN THE ATTACK DISPLAY ON THE PILOT'S TRACKING PERFORMANCE (1958)
    In:  CASI
    Details
    Publication Date: 2019-05-11
    Description: Effects of manual attack-display noise filtering on pilot tracking performance
    Keywords: COMPUTERS
    Type: NACA-RM-A58E21
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    Design of a fault tolerant airborne digital computer. Volume 2: Computational requirements and technology (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: This final report summarizes the work on the design of a fault tolerant digital computer for aircraft. Volume 2 is composed of two parts. Part 1 is concerned with the computational requirements associated with an advanced commercial aircraft. Part 2 reviews the technology that will be available for the implementation of the computer in the 1975-1985 period. With regard to the computation task 26 computations have been categorized according to computational load, memory requirements, criticality, permitted down-time, and the need to save data in order to effect a roll-back. The technology part stresses the impact of large scale integration (LSI) on the realization of logic and memory. Also considered was module interconnection possibilities so as to minimize fault propagation.
    Keywords: COMPUTERS
    Type: NASA-CR-132253
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    On-line diagnosis of sequential systems (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A model for on-line diagnosis was investigated for discrete-time systems, and resettable sequential systems. Generalized notions of a realization are discussed along with fault tolerance and errors. Further investigation into the theory of on-line diagnosis is recommended for three levels: binary state-assigned level, logical circuit level, and the subsystem-network level.
    Keywords: COMPUTERS
    Type: NASA-CR-136499 , SEL-TR-72
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    The CADSS design automation system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: This research was designed to implement and extend a previously defined design automation system for the design of small digital structures. A description is included of the higher level language developed to describe systems as a sequence of register transfer operations. The system simulator which is used to determine if the original description is correct is also discussed. The design automation system produces tables describing the state transistions of the system and the operation of all registers. In addition all Boolean equations specifying system operation are minimized and converted to NAND gate structures. Suggestions for further extensions to the system are also given.
    Keywords: COMPUTERS
    Type: NASA-CR-134165
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    A structurally oriented simulation system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The computer program SOSS (Structurally Oriented Simulation System) is designed to be used as an experimental aid in the study of reliable systems. Basically, SOSS can simulate the structure and behavior of a discrete-time, finite-state, time-invariant system at various levels of structural definition. A general description of the program is given along with its modes of operation, command language of the basic system, future features to be incorporated in SOSS, and an example of usage.
    Keywords: COMPUTERS
    Type: NASA-CR-136500 , SEL-TR-70
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    A computer program to determine the possible daily release window for sky target experiments (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A computer program is presented which is designed to determine the daily release window for sky target experiments. Factors considered in the program include: (1) target illumination by the sun at release time and during the tracking period; (2) look angle elevation above local horizon from each tracking station to the target; (3) solar depression angle from the local horizon of each tracking station during the experimental period after target release; (4) lunar depression angle from the local horizon of each tracking station during the experimental period after target release; and (5) total sky background brightness as seen from each tracking station while viewing the target. Program output is produced in both graphic and data form. Output data can be plotted for a single calendar month or year. The numerical values used to generate the plots are furnished to permit a more detailed review of the computed daily release windows.
    Keywords: COMPUTERS
    Type: NASA-SP-3075
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    A method of billing third generation computer users (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A method is presented for charging users for the processing of their applications on third generation digital computer systems is presented. For background purposes, problems and goals in billing on third generation systems are discussed. Detailed formulas are derived based on expected utilization and computer component cost. These formulas are then applied to a specific computer system (UNIVAC 1108). The method, although possessing some weaknesses, is presented as a definite improvement over use of second generation billing methods.
    Keywords: COMPUTERS
    Type: NASA-TN-D-7515 , M-545
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    A study of techniques for processing multispectral scanner data (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A linear decision rule to reduce the time required for processing multispectral scanner data is developed. Test results are presented which justify the use of the new rule for digital processing whenever both accuracy and processing time are important. A method of evaluating the performance of the rule is also developed and applied to the problem of choosing a subset of channels. A technique used to find linear combinations of channels is described. The ability to extend signatures throughout a small area of approximately fifty square miles is tested. After preprocessing, signatures derived from the first of seven overlapping data sets are applied to all data sets. The test results show that the average probability of misclassification tends to increase with an increase in the number of data sets over which the signatures are extended.
    Keywords: COMPUTERS
    Type: NASA-CR-134069 , ERIM-31650-155-T
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    Advanced On-Board Processor (AOP) (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Advanced On-board Processor the (AOP) uses large scale integration throughout and is the most advanced space qualified computer of its class in existence today. It was designed to satisfy most spacecraft requirements which are anticipated over the next several years. The AOP design utilizes custom metallized multigate arrays (CMMA) which have been designed specifically for this computer. This approach provides the most efficient use of circuits, reduces volume, weight, assembly costs and provides for a significant increase in reliability by the significant reduction in conventional circuit interconnections. The required 69 CMMA packages are assembled on a single multilayer printed circuit board which together with associated connectors constitutes the complete AOP. This approach also reduces conventional interconnections thus further reducing weight, volume and assembly costs.
    Keywords: COMPUTERS
    Type: NASA-CR-132851
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    A 2-cycle algorithm for source coding with a fidelity criterion. (1973)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: COMPUTERS
    Type: IEEE Transactions on Information Theory; IT-19; Jan. 197
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    A partitioning algorithm with application in pattern classification and the optimization of decision trees. (1973)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Keywords: COMPUTERS
    Type: IEEE Transactions on Computers; C-22; Jan. 197
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    Scheduling algorithms for multiprogramming in a hard-real-time environment. (1973)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The problem of multiprogram scheduling on a single processor is studied from the viewpoint of the characteristics peculiar to the program functions that need guaranteed service. It is shown that an optimum fixed priority scheduler possesses an upper bound to processor utilization which may be as low as 70 percent for large task sets. It is also shown that full processor utilization can be achieved by dynamically assigning priorities on the basis of their current deadlines. A combination of these two scheduling techniques is also discussed.
    Keywords: COMPUTERS
    Type: Association for Computing Machinery; vol. 20
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    NASIS data base management system: IBM 360 TSS implementation. Volume 6: NASIS message file (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The message file for the NASA Aerospace Safety Information System (NASIS) is discussed. The message file contains all the message and term explanations for the system. The data contained in the file can be broken down into three separate sections: (1) global terms, (2) local terms, and (3) system messages. The various terms are defined and their use within the system is explained.
    Keywords: COMPUTERS
    Type: NASA-CR-134460
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  • 86
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    NASIS data base management system: IBM 360 TSS implementation. Volume 3: Data set specifications (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The data set specifications for the NASA Aerospace Safety Information System (NASIS) are presented. The data set specifications describe the content, format, and medium of communication of every data set required by the system. All relevant information pertinent to a particular data set is prepared in a standard form and centralized in a single document. The format for the data set is provided.
    Keywords: COMPUTERS
    Type: NASA-CR-134457
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  • 87
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    NASA/MSFC multilayer diffusion models and computer program for operational prediction of toxic fuel hazards (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The NASA/MSFC multilayer diffusion models are discribed which are used in applying meteorological information to the estimation of toxic fuel hazards resulting from the launch of rocket vehicle and from accidental cold spills and leaks of toxic fuels. Background information, definitions of terms, description of the multilayer concept are presented along with formulas for determining the buoyant rise of hot exhaust clouds or plumes from conflagrations, and descriptions of the multilayer diffusion models. A brief description of the computer program is given, and sample problems and their solutions are included. Derivations of the cloud rise formulas, users instructions, and computer program output lists are also included.
    Keywords: COMPUTERS
    Type: NASA-CR-129006
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  • 88
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    An update of input instructions to TEMOD (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The theory and operation of a FORTRAN 4 computer code, designated as TEMOD, used to calcuate tubular thermoelectric generator performance is described in WANL-TME-1906. The original version of TEMOD was developed in 1969. A description is given of additions to the mathematical model and an update of the input instructions to the code. Although the basic mathematical model described in WANL-TME-1906 has remained unchanged, a substantial number of input/output options were added to allow completion of module performance parametrics as required in support of the compact thermoelectric converter system technology program.
    Keywords: COMPUTERS
    Type: NASA-CR-121225 , WANL-TME-1906A
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  • 89
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    Study of a hybrid multispectral processor (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A hybrid processor is described offering enough handling capacity and speed to process efficiently the large quantities of multispectral data that can be gathered by scanner systems such as MSDS, SKYLAB, ERTS, and ERIM M-7. Combinations of general-purpose and special-purpose hybrid computers were examined to include both analog and digital types as well as all-digital configurations. The current trend toward lower costs for medium-scale digital circuitry suggests that the all-digital approach may offer the better solution within the time frame of the next few years. The study recommends and defines such a hybrid digital computing system in which both special-purpose and general-purpose digital computers would be employed. The tasks of recognizing surface objects would be performed in a parallel, pipeline digital system while the tasks of control and monitoring would be handled by a medium-scale minicomputer system. A program to design and construct a small, prototype, all-digital system has been started.
    Keywords: COMPUTERS
    Type: NASA-CR-133976 , ERIM-31650-154-T
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  • 90
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    BEAMR: An interactive graphic computer program for design of charged particle beam transport systems (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A computer program for a PDP-15 is presented which calculates, to first order, the characteristics of charged-particle beam as it is transported through a sequence of focusing and bending magnets. The maximum dimensions of the beam envelope normal to the transport system axis are continuously plotted on an oscilloscope as a function of distance along the axis. Provision is made to iterate the calculation by changing the types of magnets, their positions, and their field strengths. The program is especially useful for transport system design studies because of the ease and rapidity of altering parameters from panel switches. A typical calculation for a system with eight elements is completed in less than 10 seconds. An IBM 7094 version containing more-detailed printed output but no oscilloscope display is also presented.
    Keywords: COMPUTERS
    Type: NASA-TN-D-7352 , E-7384
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  • 91
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    Automated attendance accounting system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An automated accounting system useful for applying data to a computer from any or all of a multiplicity of data terminals is disclosed. The system essentially includes a preselected number of data terminals which are each adapted to convert data words of decimal form to another form, i.e., binary, usable with the computer. Each data terminal may take the form of a keyboard unit having a number of depressable buttons or switches corresponding to selected data digits and/or function digits. A bank of data buffers, one of which is associated with each data terminal, is provided as a temporary storage. Data from the terminals is applied to the data buffers on a digit by digit basis for transfer via a multiplexer to the computer.
    Keywords: COMPUTERS
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  • 92
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    Mission and data operations IBM 360 user's guide (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The M and DO computer systems are introduced and supplemented. The hardware and software status is discussed, along with standard processors and user libraries. Data management techniques are presented, as well as machine independence, debugging facilities, and overlay considerations.
    Keywords: COMPUTERS
    Type: NASA-TM-X-69900
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  • 93
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    A real-time digital program for estimating aircraft stability and control parameters from flight test data by using the maximum likelihood method (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A computer program (Langley program C1123) has been developed for estimating aircraft stability and control parameters from flight test data. These parameters are estimated by the maximum likelihood estimation procedure implemented on a real-time digital simulation system, which uses the Control Data 6600 computer. This system allows the investigator to interact with the program in order to obtain satisfactory results. Part of this system, the control and display capabilities, is described for this program. This report also describes the computer program by presenting the program variables, subroutines, flow charts, listings, and operational features. Program usage is demonstrated with a test case using pseudo or simulated flight data.
    Keywords: COMPUTERS
    Type: NASA-TM-X-2788 , L-8796
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  • 94
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    On the performance of block codes (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: It is important to define and evaluate measures which incorporate most, if not all, of the quantities affecting the overall system reliability. For the simple types of block codes normally employed in space communication systems, the complexity of the encoder and decoder is of little consequence, since the use of integrated circuit technology allows the construction of the basic components in an inexpensive fashion. The complexity is essentially independent of the particular code-decoder used. The processing speed is generally a function of the type of logic used and the technology in the construction of the integrated circuits.
    Keywords: COMPUTERS
    Type: NASA-CR-132843
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  • 95
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    Search properties of some sequential decoding algorithms. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Sequential decoding procedures are studied in the context of selecting a path through a tree. Several algorithms are considered, and their properties are compared. It is shown that the stack algorithm introduced by Zigangirov (1966) and by Jelinek (1969) is essentially equivalent to the Fano algorithm with regard to the set of nodes examined and the path selected, although the description, implementation, and action of the two algorithms are quite different. A modified Fano algorithm is introduced, in which the quantizing parameter is eliminated. It can be inferred from limited simulation results that, at least in some applications, the new algorithm is computationally inferior to the old. However, it is of some theoretical interest since the conventional Fano algorithm may be considered to be a quantized version of it.
    Keywords: COMPUTERS
    Type: IEEE Transactions on Information Theory; IT-19; July 197
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  • 96
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    Eigenproblem solution by a combined Sturm sequence and inverse iteration technique. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Description of an efficient and numerically stable algorithm, along with a complete listing of the associated computer program, developed for the accurate computation of specified roots and associated vectors of the eigenvalue problem Aq = lambda Bq with band symmetric A and B, B being also positive-definite. The desired roots are first isolated by the Sturm sequence procedure; then a special variant of the inverse iteration technique is applied for the individual determination of each root along with its vector. The algorithm fully exploits the banded form of relevant matrices, and the associated program written in FORTRAN V for the JPL UNIVAC 1108 computer proves to be most significantly economical in comparison to similar existing procedures. The program may be conveniently utilized for the efficient solution of practical engineering problems, involving free vibration and buckling analysis of structures. Results of such analyses are presented for representative structures.
    Keywords: COMPUTERS
    Type: International Journal for Numerical Methods in Engineering; 7; 1, 19; 1973
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  • 97
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    DONAR - A computer processing system to extend ultrasonic pulse-echo testing. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A dedicated general purpose digital computer has been built on the principle of a sampled-data system to run an ultrasonic subsystem under programmed control. A most significant application is the ability to extract a signal from an interfering background. As illustrated in the paper, a 1 mm diameter transducer was used to measure the diameter of a 2.5 mm OD plastics tube with 0.4 mm wall thickness. Echoes from all four surfaces were displayed and the measurements indicated an uncertainty of less than 0.1 mm.
    Keywords: COMPUTERS
    Type: Ultrasonics; 11; July 197
    Format: text
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  • 98
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    Dynamic scheduling of large digital computer systems using adaptive control and clustering techniques. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: COMPUTERS
    Format: text
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  • 99
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    Modeling of a bubble-memory organization with self-checking translators to achieve high reliability. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Study of the design and modeling of a highly reliable bubble-memory system that has the capabilities of: (1) correcting a single 16-adjacent bit-group error resulting from failures in a single basic storage module (BSM), and (2) detecting with a probability greater than 0.99 any double errors resulting from failures in BSM's. The results of the study justify the design philosophy adopted of employing memory data encoding and a translator to correct single group errors and detect double group errors to enhance the overall system reliability.
    Keywords: COMPUTERS
    Type: IEEE Transactions on Computers; C-22; Mar. 197
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  • 100
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    NASIS data base management system: IBM 360 TSS implementation. Volume 8: Data base administrator user's guide (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The Data Base Administrator User's Guide for the NASA Aerospace Safety Information System is presented. The subjects discussed are: (1) multi-terminal tasking, (2) data base executive, (3) utilities, (4) maintenance, (5) terminal support, and (6) retrieval subsystem.
    Keywords: COMPUTERS
    Type: NASA-CR-134462
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