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System software for the NMFECC CRAY-1 version of GIFTS 4B. [In CFT-FORTRAN]

Description: The Oak Ridge National Laboratory (ORNL) maintains a version of the GIFTS system structural analysis computer programs. Executable modules are supported on two different types of computer hardware, a DECsystem-10 and a CRAY-1. Without external difference to the user, these modules execute equivalently upon both types of hardware. Presented herein are the local software enhancements for the ORNL version of GIFTS for the National Magnetic Fusion Energy Computer Center (NMFECC) CRAY-1 computer as … more
Date: January 1, 1981
Creator: Gray, W.H. & Baudry, T.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A portable generic elementary function package in Ada and an accurate test suite

Description: A comprehensive set of elementary functions has been implemented portably in Ada. The high accuracy of the implementation has been confirmed by rigorous analysis. Moreover, we present new test methods that are efficient and offer a high resolution of 0.005 unit in the last place. These test methods have been implemented portably here and confirm the accuracy of our implemented functions. Reports on the accuracy of other function libraries obtained by our test programs are also presented. 26 ref… more
Date: November 1, 1990
Creator: Tang, Ping Tak Peter.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Implementing Automatic Differentiation Efficiently

Description: The automatic differentiation of computer arithmetic has been investigated since before 1960. Most of this effort has been centered on the forward mode of derivative evaluation. Speelpenning, Iri and Kubota, and Horwedel et al. have all implemented the more efficient reverse mode of evaluating derivatives in their respective Fortran precompilers. The reverse mode requires information about a computation to be stored in order that derivatives may be calculated after the function evaluation has b… more
Date: October 1, 1990
Creator: Juedes, D. & Griewank, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RELSIM: a systems reliability simulation code. [In FORTRAN for CDC 6600 or Prime 300 minicomputer]

Description: The reliability characteristics of systems with multidimensional networks containing nonidentical digital components in tandem, and parallel with any survivability strategies, are modeled with RELSIM program modules. 6 figures, 1 table.
Date: January 1, 1979
Creator: Schelonka, E.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Deconvolution/identification techniques for 1-D transient signals

Description: This paper discusses a variety of nonparametric deconvolution and identification techniques that we have developed for application to 1-D transient signal problems. These methods are time-domain techniques that use direct methods for matrix inversion. Therefore, they are not appropriate for large data'' problems. These techniques involve various regularization methods and permit the use of certain kinds of a priori information in estimating the unknown. These techniques have been implemented in… more
Date: October 1, 1990
Creator: Goodman, D.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Multirate ordinary differential equation intergrator. [MRATE, in FORTRAN for IBM 360/75, CYBER 175, and INTERDATA 7/32]

Description: Most of the work on the numerical integration of systems of ordinary differential equations concerns itself with integrating all the variables simultaneously. There has been little theoretical work on integrating the variables separately (multirate methods), and even less in implementing a multirate ordinary differential equation integrator. A multirate integrator is presented in this work, and different schemes are tested. The implemented multirate integrator is applied to a variety of test pr… more
Date: March 1, 1979
Creator: Orailoglu, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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COMP: a basic non-linear last squares curve fitting package. [Interactive program for PDP-11/34 or 11/70]

Description: To find a mathematical model which describes (fits) data from a process which is fundamentally nonlinear, one usually uses nonlinear least-squares techniques on maxicomputers. These usually run in batch mode with the user supplying a model and initial ''guesstimates'' of its parameters. However, fitting the model to the data can be considered an art because computer algorithms either converge to true solutions, or converge to erroneous solutions, or fail to converge, depending on the quality of… more
Date: November 1, 1977
Creator: Watson, C. R.; Cochran, M. I.; Thomas, J. M. & Eberhardt, L. L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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FORTRAN programs for data fitting using orthogonal polynomials. [ORFIT, FIT, and TFIT, for PDP-11]

Description: The use of orthogonal functions in least-squares data fitting is discussed, and a FORTRAN subroutine (ORFIT) which uses orthogonal polynomials in data fitting is presented. Also described are two FORTRAN programs for fitting data which use the subroutine ORFIT. The first one, FIT, is a general-purpose data fitting program. The second one, TFIT, is specifically intended for use in calibrating cryogenic germanium resistance thermometers. TFIT fits lnT to a polynomial in lnR (where T and R are the… more
Date: May 1, 1978
Creator: Gibson, B.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cross Reference Analysis of Fortran (CRAFT)

Description: Cross Reference Analysis of Fortran (Craft) is a set of programs which extract cross reference data from listing files generated by the Cray Research cft77 Fortran compiler. The data is separated into a number of files by a preprocessor written in C. These data files are sorted and then post processed by a Fortran program to generate various summary reports as requested by the user. 7 refs.
Date: July 1, 1991
Creator: Marshall, N.H. & Marwil, E.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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NURE rabbit and card reader

Description: The NURE Rabbit and IBM Card Reader is a LSI-11 based microcomputer system. The purpose of the rabbit and card reader is to read the drilled code (ID) on the polyethylene rabbit, read the punched data on the traveler card, and then store the code (ID) and the card data together as a record in a file on a floppy diskette. A record is 82 words long with the first 2 words being the rabbit ID number. The components involved are the card reader, the rabbit reader, the LSI-11 microcomputer and chassi… more
Date: August 31, 1977
Creator: Bourret, S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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GENVAR: a general linear computer program for model forecasting and variance analysis. [In LRLTRAN for CDC 7600 computer]

Description: This report describes GENVAR, an interactive computer program which can perform a least-squares fit to the matrix equation ..beta..X = Y, where X is a matrix of observable inputs and Y is a vector of observable outcomes for the input values. The program is controlled by teletypewriter, and is written in LRLTRAN for compilation by CHAT and execution on a CDC 7600. The report describes the way the program operates as well as ways GENVAR can be used to make statistically considered forecasts. Samp… more
Date: January 12, 1977
Creator: Stratton, S. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ZONE: a finite element mesh generator. [In FORTRAN IV for CDC 7600]

Description: The ZONE computer program is a finite-element mesh generator which produces the nodes and element description of any two-dimensional geometry. The geometry is subdivided into a mesh of quadrilateral and triangular zones arranged sequentially in an ordered march through the geometry. The order of march can be chosen so that the minimum bandwidth is obtained. The node points are defined in terms of the x and y coordinates in a global rectangular coordinate system. The zones generated are quadrila… more
Date: May 1, 1976
Creator: Burger, M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FORODT: Fortran debug routine for the PDP-11 (RT-11). [For run-time debugging]

Description: FORODT provides run-time debug features to PDP-11 Fortran programs running with the RT-11 operating system. Digital Equipment Corporation's ODT program has been extended to include Fortran breakpoints, decimal integer and floating point data input, and output options. 3 figures.
Date: January 1, 1977
Creator: Tanner, D. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MAFJ: some simple additions to MAFCO. [Generates magnetic fields resulting from collections of current elements, for CDC 7600 computer]

Description: MAFJ is a revision of the MAFCO code which generates magnetic fields (B) resulting from collections of current elements. In addition to the original MAFCO's capabilities, MAFJ follows field lines through a region of interest and calculates integrals of functions along these lines. It can also generate three-dimensional grids of B. MAFJ runs from eight to 15 times faster than MAFCO, depending on the types of current elements chosen. 2 tables.
Date: January 12, 1976
Creator: Finan, C. H., III & McNamara, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Basic row-column operations with orthogonally linked sparse matrices for use with FORTRAN

Description: An orthogonally linked data structure is used to represent sparse rectangular matrices. This representation requires four type INTEGER locations and one type REAL location per nonzero entry in the matrix. Operations are presented that perform many of the basic computations required in numerical linear algebra. The operations are available in portable FORTRAN, with the exception of the necessarily operating-system-sensitive ''get'' and ''put'' subprogram for the individual records. The package o… more
Date: October 1, 1977
Creator: Hanson, R. J. & Wisniewski, J. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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User's guide for the computer program DASAVOR: data storage and variable output recovery system. [For rapid collation and presentation of large quantities of data; in FORTRAN for IBM 360 computer]

Description: A data storage and recovery system was devised to allow the rapid collation and presentation of large quantities of data in three usable forms: a listing of all data on each experiment, a listing of preselected data, and a plot of any set of data points. The system employs a punch card data storage system, a card sorter, and a FORTRAN computer program. 7 figures.
Date: May 1, 1977
Creator: Jubin, R. T. & Moore, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Name management in the construction of large programs. [Modular decomposition, programmed in PL/I for IBM 360/65]

Description: There has been much recent work on the problem of constructing large programs. One aspect of this problem that has been somewhat ignored is the management of names during the program construction process. A framework emphasizing this aspect of the problem is presented. Linguistic constructs for the manipulation of names between independently written pieces of text are defined. An implementation model defining the effect of these constructs on the naming structure of the resulting language is pr… more
Date: August 1, 1976
Creator: Carr, P. A.; Keller, R. F. & Wright, C. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FBSAM data transmission package for IBM 360/370 computers. [For rapid movement of large blocks of data directly between user storage arrays and magnetic disk data sets, in FORTRAN IV and assembly language]

Description: The FBSAM subroutine package provides rapid movement of large blocks of data directly between user storage arrays and magnetic disk data sets. No buffer space is required. Large reductions in data transmission time and number of I/0 requests can be obtained. Moves can be concurrent with each other and with computation. A form of random access is available. A demonstration program provides a thorough test of all features. The package is intended for use by FORTRAN programers with little or no as… more
Date: January 1, 1976
Creator: Rhoades, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computer implementation of Glimm's method. [Subroutine GLIMM, for solution of nonlinear hyperbolic equations, in FORTRAN for CDC 7600 computer]

Description: Glimm's method deals with the solution of a nonlinear hyperbolic equation. The method is rooted in the constructive proof by Glimm (Comm. Pure Appl. Math., 18, 697 (1965)) that such systems have weak solutions. The Riemann problem is examined. The iterative method of Godunov, the selection of random numbers, and the actual implementation of Glimm's method are discussed. Usage of the FORTRAN subroutine GLIMM is explained; a flow chart is provided. Graphical results are presented for th… more
Date: August 1, 1976
Creator: Sod, Gary A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Eigensystem computation for skew-symmetric matrices and a class of symmetric matrices. [Subroutines TRIZD, IMZD, and TBAKZD in FORTRAN for IBM 360/91 computer]

Description: An algorithm is given for computing the eigenvalues and (optionally) the eigenvectors of either a skew-symmetric matrix or a symmetric tridiagonal matrix with constant diagonal. The algorithm uses only orthogonal similarity transformations, and is believed to be the most efficient algorithm available for computing all the eigenvalues or the complete eigensystem. 2 tables.
Date: May 1, 1976
Creator: Ward, R. C. & Gray, L. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Upgrade of the GRESS (test version D) precompiler to allow triply-dimensioned arrays

Description: GRESS is a FORTRAN precompiler and run time library which automatically processes computer models and adds derivative-taking capabilities to the normal calculated results. The GRESS system is under development at ORNL and work is proceeding in upgrading test versions of the precompiler to allow processing by GRESS of most of the ANSI X3.9-1978 FORTRAN syntax. Heretofore, a major limitation has been the inability of GRESS to process arrays with more than two dimensions. Consequently, a significa… more
Date: December 1, 1986
Creator: Horwedel, J. E. & Pin, F. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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TWO-STEP: user's guide (computer program for CDC 6400). [For exact solution of linear matrix equations over integral domain, in FORTRAN for CDC 6400 computer]

Description: A guide for the use of the CDC-6400 Computer Program TWO-STEP for the exact solution of linear matrix equations over the integral domain is given. The rational result is converted into decimal form to 12 decimal places.
Date: April 1, 1976
Creator: Bareiss, E. H. & Kobbe, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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