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Early Experiences with the IBM SP1 and the High-Performance Switch

Description: The IBM SP1 is IBM`s newest parallel distributed-memory computer. As part of a joint project with IBM, Argonne took delivery of an early system in order to evaluate the software environment and to begin porting programming packages and applications to this machine. This report discusses the results of those efforts once the high-performance switch was installed. An earlier report (ANL/MCS-TM-177) emphasized software usability and the initial ports to the SP1. This report contains performance re… more
Date: November 1993
Creator: Gropp, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiolytic and Radiolytically Induced Generation of Gases from Synthetic Wastes : Final Report

Description: To better understand the processes leading to the generation and release of gases from waste tanks, the authors studied the radiolytic and thermal generation of H2, N2O, N2, O2, and NH3 in nonradioactive waste simulant solutions and slurries. The radiolytic sources for H2 are e(sub aq)⁻ and its predecessors and H atoms. Radiolysis of the water generates some H2 and an additional amount comes from the hydrogen abstraction reaction H + RH(yields) H2+R(center_dot). Nitrate scavenges e(sub aq)(sup … more
Date: October 1993
Creator: Meisel, Dan; Jonah, Charles D.; Kapoor, S.; Matheson, Max S. & Sauer, M. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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User`s Guide for the Casting Process Simulator Software CaPS-2D, Version 1.0

Description: Most casting defects occur during initial pouring and therefore the design of the running system, which guides the metal from the ladle into the mold, is crucial. Traditionally, the running system and mold filling are designed by trial and error, which is tedious, time consuming, and expensive. The uncertainties that remain can be overcome by a computer simulation that demonstrates the actual process of mold filling and subsequent solidification. Computer simulation of various processes has bec… more
Date: July 1993
Creator: Domanus, H. M.; Schmitt, R. C. & Ahuja, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling Emissions of Volatile Organic Compounds from New Carpets

Description: A simple model is proposed to account for observed emissions of volatile organic compounds (VOCs) from new carpets. The model assumes that the VOCs originate predominantly in a uniform slab of polymer backing material. Parameters for the model (the initial concentration of a VOC in the polymer, a diffusion coefficient and an equilibrium polymer/air partition coefficient) are obtained from experimental data produced by a previous chamber study. The diffusion coefficients generally decrease as th… more
Date: February 1, 1993
Creator: Little, J. C.; Hodgson, A. T. & Gadgil, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Diffuse scattering and image contrast of tweed in superconducting oxides: A simulation and interpretation

Description: Monte Carlo simulations were performed with a lattice gas model which represents the interactions between oxygen atoms in YBa[sub 2](Cu[sub 1-x]M[sub x])[sub 3]O[sub 7+[delta]] (M=Fe, Co, or Al, 0.03< [times] <0.l) system. The amplitudes of concentration waves/displacement waves obtained from these simulations then were used to calculate the intensity of the diffuse scattering of tweed seen in the electron diffraction pattern. The characteristic features of the tweed image were produced by calc… more
Date: January 1, 1993
Creator: Zhu, Yimei & Cai, Zhi-Xiong.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Long-term Industrial Energy Forecasting (LIEF) model (18-sector version)

Description: The new 18-sector Long-term Industrial Energy Forecasting (LIEF) model is designed for convenient study of future industrial energy consumption, taking into account the composition of production, energy prices, and certain kinds of policy initiatives. Electricity and aggregate fossil fuels are modeled. Changes in energy intensity in each sector are driven by autonomous technological improvement (price-independent trend), the opportunity for energy-price-sensitive improvements, energy price expe… more
Date: May 1993
Creator: Ross, M. H.; Thimmapuram, P.; Fisher, R. E. & Maciorowski, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Structure and stability of microvoids in A-Si:H

Description: Microvoids appear to be universally present in a-Si:H as demonstrated by small angle X-ray scattering including the presence of microvoids in device quality glow discharge a-Si:H. We have studied the structural properties of these microvoids with molecular dynamics simulations. Using molecular dynamics simulations with classical potentials, we have created microvoids by removing Si and H atoms from a computer generated a-Si:H network. The internal surfaces of the microvoids were passivated with… more
Date: January 1, 1993
Creator: Biswas, R. & Kwon, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dynamic impact and pressure analysis of the insensitive munitions container PA103 with modified design features

Description: This report presents analytical analyses of the insensitive munitions container PA103, with modified design features for a static internal pressure of 500 psi and for a dynamic impact resulting from a 7-ft free fall onto a rigid surface. The modified design features addressed by the analyses were the inclusion of a score pattern on the container cylindrical body and a plastic plate (fuse) sandwiched between metal flanges on the container end. The objectives of both the pressure and impact analy… more
Date: June 1, 1993
Creator: Handy, K.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The [delta]f algorithm for beam dynamics

Description: An algorithm is developed to study particle dynamics of beams including collective interaction with high accuracy and low noise. Particle dynamics with collective interactions is treated through particle simulation, where the main or average distribution f[sub 0] and the deviation away from it [delta]f are separately followed. The main distribution f[sub 0] is handled by an analytic equilibrium solution and the perturbation away from it [delta]f is followed by the method of characteristics. We … more
Date: May 1, 1993
Creator: Koga, J. & Tajima, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Estimate of LOCA-FI plenum pressure uncertainty for a five-ring RELAP5 production reactor model

Description: The RELAP5/MOD2.5 code (RELAP5) is used to perform best-estimate analyses of certain postulated Design Basis Accidents (DBAs) in SRS production reactors. Currently, the most limiting DBA in terms of reactor power level is an instantaneous double-ended guillotine break (DEGB) loss of coolant accident (LOCA). A six-loop RELAP5 K Reactor model is used to analyze the reactor system behavior dozing the Flow Instability (FI) phase of the LOCA, which comprises only the first 5 seconds following the DE… more
Date: March 1, 1993
Creator: Griggs, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MHD simulation of deuterium-fiber-initiated Z-pinches with two-fluid effects

Description: Two-dimensional cold-start'' resistive MHD computations of formation and evolution of deuterium-fiber-initiated Z-pinches have been extended to include separate ion and electron energy equations and finite-Larmor-radius ordered terms. In the Ohm's Law (magnetic field evolution) equation, Hall and diamagnetic pressure terms have been added, and corresponding terms have been added to the energy equations. Comparison is made of the results of these computations with previous computations and with … more
Date: January 1, 1993
Creator: Sheehey, P. (California Univ., Los Angeles, CA (United States). Dept. of Physics) & Lindemuth, I.R. (Los Alamos National Lab., NM (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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TSC plasma halo simulation of a DIII-D vertical displacement episode

Description: A benchmark of the Tokamak Simulation Code (TSC) plasma halo model has been achieved by calibration against a DIII-D vertical displacement episode (VDE) consisting of vertical drift, thermal quench, and current quench. Inclusion of a 1-to 4-eV halo surrounding the main plasma was found to be necessary to match simulation and experimental results for plasma current decay, trajectory, toroidal and poloidal vessel currents, and magnetic probe and flux loop values for the entire VDE.
Date: January 1, 1993
Creator: Sayer, R.O.; Peng, Y.K.M. (Oak Ridge National Lab., TN (United States)); Jardin, S.C. (Princeton Univ., NJ (United States). Plasma Physics Lab.); Kellman, A.G. & Wesley, J.C. (General Atomics, San Diego, CA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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GEM muon tracking R and D

Description: The suitability of open-profile CSCs for the GEM muon system was evaluated by constructing a small (0.5 m [times] 1.0 m) prototype and testing it with cosmic ray muons. The measured spatial resolution surpassed the GEM requirement of 75 [mu]m. The test results were compared with Monte Carlo simulations; good agreement was found. Studies of the timing properties of the prototype have been started.
Date: April 1, 1993
Creator: Lau, K.; Mayes, B.; Pyrlik, J. & Weinstein, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The iterative Monte Carlo technique for collisionless plasma flow to a surface

Description: A new technique for modelling the boundary plasma of magnetic fusion devices is described. The technique represents a natural extension of existing Monte Carlo codes, which are presently constrained to have the plasma background specified by either measurements or predictions from plasma fluid codes. The new approach, the Iterative Monte Carlo (IMC) technique, self-consistently determines the ambipolar electric field in the plasma by feeding back into the simulation the evolving plasma density … more
Date: March 1, 1993
Creator: Pitcher, C. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Status of the BEDLAM optics code

Description: The BEDLAM simulation code (BEam Dynamics in Linear Accelerators by Moments) represents the beam by its phase-space moments. Here, we present a status report on our work in developing this approach, which is an efficient way to compute 3-D beam motion to high order. The space-charge algorithm, which extends Sacherer's results to higher order, now works well for some test cases but is inaccurate for others. We found that for high-brightness beams, higher-order motion is qualitatively different f… more
Date: January 1, 1993
Creator: Lysenko, W.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[A Study of the Magnetic Field Annihilation Process in the Magnetosphere and Some Geotechnical Applications]

Description: Our proposed project is to study the magneto reconnection processes in the Earth's magnetosphere by using both analytical methods and computer simulations. The three-dimensional (3-D) topology of the reconnected field lines and the kinetic aspects of magnetic reconnection in the collisionless magnetosphere are emphasized in the present study. At the dayside magnetopause magnetic flux ropes can form as a result of multiple X-line reconnection. Our 3-D MHD simulation shows that for an appropriate… more
Date: January 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Composition dependence of fluid thermophysical properties: Theory and modeling

Description: Objectives are studies of equilibrium/nonequilibrium properties of asymmetric fluid mixtures through computer simulation (CS), development of predictive theories of mixture equilibrium properties, development and application of selection algorithm methodology for mixture equations of state, and use of theory to develop new engineering design models for fluid mixtures. Kirwood charging method CS of Lennard-Jones mixtures with large size ratios verified the Kirkwood-Buff/Baxter method of calculat… more
Date: March 29, 1993
Creator: Ely, J.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Annual report on monitoring of the unsaturated zone and recharge areas at INEL to the state of Idaho INLEL Oversight COmmittee

Description: This project, begun in March 1991, was originally structured as two separate research efforts: An investigation of the recharge phenomenon and surface water-ground water interactions at the INEL; and a study of water and contaminant movement through the unsaturated zone, including a review of computer models used to described this process. During the initial months of work, it became obvious to those involved in these studies that the two topic areas were intimately related, and work since that… more
Date: March 1, 1993
Creator: Horn, D.; Liou, J. & Finnie, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rapid pressure swing absorption cleanup of post-shift reactor synthesis gas

Description: The theoretical model for the absorption part of a particular type of RAPSAB cycle (Mode 3) (see Technical Progress Report No. 7) has been developed. The numerical simulations of the model compare well with the experimental results presented in the last report (Technical Progress Report No. 7). A number of experiments were carried out also for Mode 2 type of operation by varying the time for initial pressurization of the hollow fiber module as well as the total absorption time. These were done … more
Date: January 29, 1993
Creator: Sirkar, K. K.; Majumdar, S. & Bhaumik, S. (New Jersey Inst. of Tech., Newark, NJ (United States). Dept. of Chemical Engineering, Chemistry and Environmental Science)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Biomagnetic localization from transient quasi-static events

Description: Sensory stimuli, such as auditory, visual, or somatosensory, evoke neural responses in very localized regions of the brain. A SQUID biomagnetometer can measure the very weak fields that are generated outside of the head by this response. A simple source and head model of current dipoles inside a conducting sphere is typically used to interpret these magnetic field measurements or magnetoencephalogram (MEG). Locating dipole sources using data recorded from an array of biomagnetic sensors is dist… more
Date: January 1, 1993
Creator: Mosher, J.C.; Leahy, R.M. & Lewis, P.S. (Los Alamos National Lab., NM (United States) University of Southern California, Los Angeles, CA (United States). Signal and Image Processing Inst.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[A Study of the Magnetic Field Annihilation Process in the Magnetosphere and Some Geotechnical Applications]

Description: This paper describes significant progress made in the study of magnetic field reconnection and plasma processes in the magnetosphere in the past three years. A total of 43 research and review papers have been completed under the DOE support. In this paper, some of the most important results obtained in the past three-years are described.
Date: January 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The AMTEX Partnership

Description: The American Textile Partnership, as its name implies, is a collaborative effort between the DOE national labs and industry-related R D/educational institutions. The purpose of AMTEX is to promote R D that enhance the competitiveness of the integrated textile industry (i.e., fibers, textiles, sewn/fabricated products). The industry-related organizations bring a vital perspective of industry needs in addition to their own R D capabilities. The DOE labs bring broad R D capabilities and perspectiv… more
Date: January 1, 1993
Creator: Lemon, D.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The beam-beam interaction in e[sup +]e[sup [minus]] storage rings

Description: This article is a personal perspective about the physics of the beam-beam interaction. This is an active area of research combining operational experience, experiments, computer models, and theory with the goal being to overcome the shortcomings above. This research hasn't progressed sufficiently to quantitatively explain beam-beam limits, but there are qualitative explanations of many of the features of the beam-beam interaction and clear directions for future developments.
Date: March 1, 1993
Creator: Siemann, R.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Simulation-based biagnostics and control for nuclar power plants

Description: Advanced simulation-based diagnostics and control guidance systems for the identification and management of off-normal transient events in nuclear power plants is currently under investigation. To date a great deal of progress has been made in effectively and efficiently combining information obtained through fuzzy pattern recognition and macroscopic mass and energy inventory analysis for use in multiple failure diagnostics. Work has also begun on the unique problem of diagnostics and surveilla… more
Date: January 1, 1993
Creator: Lee, J. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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