24 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Fortran"  
Results: 1 - 24
open access

Debugging Fortran on a shared memory machine

Description: Debugging on a parallel processor is more difficult than debugging on a serial machine because errors in a parallel program may introduce nondeterminism. The approach to parallel debugging presented here attempts to reduce the problem of debugging on a parallel machine to that of debugging on a serial machine by automatically detecting nondeterminism. 20 refs., 6 figs.
Date: January 1, 1987
Creator: Allen, T.R. & Padua, D.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The KIVA-II computer program for transient multidimensional chemically reactive flows with sprays

Description: Since its public release in 1985, the KIVA computer program has been utilized for the time dependent analysis of chemically reacting flows with sprays in two and three space dimensions. This paper describes some of the improvements to the original version that have been made since that time. The new code called KIVA-II is planned for public release in early 1988. KIVA-II improves the earlier version in the accuracy and efficiency of the computational procedure, the accuracy of the physics submo… more
Date: January 1, 1987
Creator: Amsden, A. A.; Butler, T. D. & O'Rourke, P. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experimental verification of ''photon'': A computer program for use in x-ray shielding calculations

Description: At the National Synchrotron Light Source a computer program named PHOTON has been developed to calculate radiation dose values around beam lines with different configurations of shielding, scattering materials, filters, and apertures. The program will be used as a tool in the design of the future beam lines.
Date: March 1, 1987
Creator: Braeuer, E. & Thomlinson, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Users' Guide to Toolpack/1 (Release 2) in a Unix Environment

Description: This is a guide to the use of a collection of Unix shell scripts that extend the Fortran analyzing and transforming capabilities of Unix by invoking a set of tools from Toolpack/1 (Release 2). It is a substantial revision and update of Argonne report ANL/MCS-TM-77, which served as a Unix users' guide to the first release of Toolpack/1.
Date: March 1987
Creator: Cowell, Wayne R. & Garbow, B. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Toolpack/1 Release 2 : Introductory Guide

Description: This guide introduces Toolpack/1 Release 2, the second public release of Toolpack/1, an integrated suite of Fortran 77 software tools. The guide describes the background to the Toolpack project and explains the basic concepts and terms involved in the design and use of the tool suite. It also summarizes the facilities available in the second release and refers readers to other Toolpack/1 documentation for more detailed discussion. This guide should be regarded as essential preliminary reading f… more
Date: March 1987
Creator: Cowell, Wayne R.; Hague, S. J. & Iles, R. M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SAFIRE user's manual

Description: Analytical models for scaling the cost and performance of inertial confinement fusion (ICF) electric-power plants have been developed and incorporated into the SAFIRE code. SAFIRE denotes systems analysis for ICF reactor economics. This volume, Volume 2, describes the subroutines, COMMON blocks, file handling, and input and output variables of the code. (WRF)
Date: January 12, 1987
Creator: Glasgow, B. B. & Meier, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RELY: A reliability modeling system for analysis of sodium-sulfur battery configurations

Description: In support of the Office of Energy Storage and Distribution of the US Department of Energy (DOE), Pacific Northwest Laboratory has produced a microcomputer-based software package, called RELY, to assess the impact of sodium-sulfur cell reliability on constant current discharge battery performance. The Fortran-based software operates on IBM microcomputers and IBM-compatibles that have a minimum of 512K of internal memory. The software package has three models that provide the following: (1) a de… more
Date: June 1, 1987
Creator: Hostick, C. J.; Huber, H. D.; Doggett, W. H.; Dirks, J. A.; Dovey, J. F.; Grinde, R. B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Producing and supporting sharable software

Description: A survey is reported that addressed the question of shareable software for the High Energy Physics community. Statistics are compiled for the responses of 54 people attending a conference on the subject of shareable software to a questionnaire which addressed the usefulness of shareable software, preference of programming language, and source management tools. The results are found to reflect a continued need for shareable software in the High Energy Physics community and that this effort be pe… more
Date: February 1, 1987
Creator: Johnstad, H. & Nicholls, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Statistical theory of turbulent incompressible multimaterial flow

Description: Interpenetrating motion of incompressible materials is considered. ''Turbulence'' is defined as any deviation from the mean motion. Accordingly a nominally stationary fluid will exhibit turbulent fluctuations due to a single, slowly moving sphere. Mean conservation equations for interpenetrating materials in arbitrary proportions are derived using an ensemble averaging procedure, beginning with the exact equations of motion. The result is a set of conservation equations for the mean mass, momen… more
Date: October 1, 1987
Creator: Kashiwa, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A CAMAC system controlled by an IBM AT computer for time-resolved spectroscopy

Description: An IBM AT computer interfaced to a small CAMAC system offers considerable power without the complexity and expense of a large general-purpose system. Our system for time-resolved spectroscopy features menu-driven FORTRAN-based software; high-resolution and high-speed (8K channels, 5-..mu..s fixed dead time) ADCs; segmentable histogram memories (24-bit counts) with large memory space for many histogram segments; independently variable separate histogram dwell times; remote control via a CAMAC se… more
Date: January 1, 1987
Creator: Lindquist, L.O. & Moss, C.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experiences and results multitasking a hydrodynamics code on global and local memory machines

Description: A one-dimensional, time-dependent Lagrangian hydrodynamics code using a Godunov solution method has been multitasked for the Cray X-MP/48, the Intel iPSC hypercube, the Alliant FX series and the IBM RP3 computers. Actual multitasking results have been obtained for the Cray, Intel and Alliant computers and simulated results were obtained for the Cray and RP3 machines. The differences in the methods required to multitask on each of the machines is discussed. Results are presented for a sample pro… more
Date: January 1, 1987
Creator: Mandell, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pattern-recognition software detecting the onset of failures in complex systems

Description: A very general mathematical framework for embodying learned data from a complex system and combining it with a current observation to estimate the true current state of the system has been implemented using nearly universal pattern-recognition algorithms and applied to surveillance of the EBR-II power plant. In this application the methodology can provide signal validation and replacement of faulty signals on a near-real-time basis for hundreds of plant parameters. The mathematical framework, t… more
Date: 1987~
Creator: Mott, J. & King, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ADGEN: An automated adjoint code generator for large-scale sensitivity analysis

Description: This paper describes a new automated system, named ADGEN, which makes use of the strengths of computer calculus to automate the costly and time-consuming calculation of derivatives in FORTRAN computer codes, and automatically generate adjoint solutions of computer codes.
Date: January 1, 1987
Creator: Pin, F. G.; Oblow, E. M.; Horwedel, J. E. & Lucius, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The IPNS rietveld analysis software package for TOF (time-of-flight) powder diffraction data: Recent developments

Description: A system of FORTRAN programs for the analysis of time-of-flight (TOF) neutron powder diffraction data via the Rietveld method at IPNS has been modified recently, making it possible to analyze data that exhibit diffraction maxima broadened due to anisotropic strain and that can be modeled by individual atomic anharmonic thermal vibrations. The observation of noncrystalline scattering in data from some powder samples has led to the development of software to fit such scattering by a function rela… more
Date: January 1, 1987
Creator: Rotella, F. J. & Richardson, J. W. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A general approach to error propagation

Description: A computational approach to error propagation is explained. It is shown that the application of the first-order Taylor theory to a fairly general expression representing an inventory or inventory-difference quantity leads naturally to a data structure that is useful for structuring error-propagation calculations. This data structure incorporates six types of data entities: (1) the objects in the material balance, (2) numerical parameters that describe these objects, (3) groups or sets of object… more
Date: January 1, 1987
Creator: Sanborn, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Toward automated beam optics control

Description: We have begun a program aiming toward automatic control of charged-particle beam optics using artificial intelligence programming techniques. In developing our prototype, we are working with LISP machines and the KEE expert system shell. Our first goal was to develop a ''mouseable'' representation of a typical beam line. This responds actively to changes entered from the mouse or keyboard, giving an updated display of the beam line itself, its optical properties, and the instrumentation and con… more
Date: January 1, 1987
Creator: Silbar, R.R. & Schultz, D.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Review and Analysis of Fortran 8x

Description: The ANSI Standards Subcommittee X3J3 on Fortran has recently completed a draft proposed standard for the Fortran programming language. The draft proposed standard, known informally as Fortran 8x, is a revision of the current standard X3.9-1978, known informally as Fortran 77. This report is a review of Fortran 8x and consists of a series of six articles. The first article gives a general overview of Fortran 8x. The next three articles give brief discussions of the array facilities; the enhanced… more
Date: October 1987
Creator: Smith, Brian T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Los Alamos PC estimating system

Description: The Los Alamos Cost Estimating System (QUEST) is being converted to run on IBM personal computers. This very extensive estimating system is capable of supporting cost estimators from many different and varied fields. QUEST does not dictate any fixed method for estimating. QUEST supports many styles and levels of detail estimating. QUEST can be used with or without data bases. This system allows the estimator to provide reports based on levels of detail defined by combining work breakdown struct… more
Date: January 1, 1987
Creator: Stutz, R. A. & Lemon, G. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of existing and proposed HEP (High Energy Physics) data acquisition systems and their suitability for RHIC

Description: In this note, a summary of data acquisition systems is presented for the High Energy Physics collider facilities. Particular emphasis is made on the data acquisition stages and trigger rates. The suitability of these systems for a relativistic heavy ion collider calorimeter detector with ports is then discussed. 6 refs., 8 figs., 1 tab. (LSP)
Date: January 1, 1987
Creator: Sunier, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PRONTO 2D: A two-dimensional transient solid dynamics program

Description: PRONTO 2D is a two-dimensional transient solid dynamics code for analyzing large deformations of highly nonlinear materials subjected to extremely high strain rates. This Lagrangian finite element program uses an explicit time integration operator to integrate the equations of motion. Four node uniform strain quadrilateral elements are used in the finite element formulation. A number of new numerical algorithms which have been developed for the code are described in this report. An adaptive tim… more
Date: March 1, 1987
Creator: Taylor, L. M. & Flanagan, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pulsed zero field NMR of solids and liquid crystals

Description: This work describes the development and applications to solids and liquid crystals of zero field nuclear magnetic resonance (NMR) experiments with pulsed dc magnetic fields. Zero field NMR experiments are one approach for obtaining high resolution spectra of amorphous and polycrystalline materials which normally (in high field) display broad featureless spectra. The behavior of the spin system can be coherently manipulated and probed in zero field with dc magnetic field pulses which are employe… more
Date: February 1, 1987
Creator: Thayer, A.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simnple, portable, 3-D projection routine

Description: A 3-D projection routine is presented for use in computer graphics applications. The routine is simple enough to be considered portable, and easily modified for special problems. There is often the need to draw three-dimensional objects on a two-dimensional plotting surface. For the object to appear realistic, perspective effects must be included that allow near objects to appear larger than distant objects. Several 3-D projection routines are commercially available, but they are proprietary, n… more
Date: April 1, 1987
Creator: Wagner, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A benchmark of the SCS-40 computer: A mini supercomputer compatible with the Cray X-MP/24

Description: An accurate benchmark of the SCS-40 mini supercomputer manufactured by Scientific Computer Systems Corporation has been carried out. A new, revised set of standard ANSI77 Fortran benchmark codes were run on the SCS-40 in a dedicated environment, using Version 1.13 of the CFT compiler. The results are compared with those obtained on one processor of a CRAY X-MP/24 computer using the Cray Research Inc. version of the same compiler. The results suggest that for a typical Los Alamos National Labora… more
Date: January 1, 1987
Creator: Wasserman, Harvey J.; Simmons, Margaret L. & Hayes, Ann H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Center for Supercomputing Research and Development: Quarterly report, First quarter, 1987

Description: This paper discusses progress on hardware and applications of superconducting design. The topic titles covered are: hardware development, architecture research, operating system research and development, Cedar Fortran, symbolic processing, compiler research, scientific workstation environment, and numerical library. (LSP)
Date: June 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen