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OTTER Experiments Pertinent to CADE-10

Description: This Argonne report serves as a companion to our CADE-10 paper. To fulfill promises made in that paper, included here are detailed proofs in clause notation, input files compatible with OTTER, and explanations for the choice of approach. Also included are certain of the original and unpublished proofs (of Winker) that answered four open questions, two in equivalent calculus and two in the R-calculus. The organization parallels that of the CADE-10 paper.
Date: February 1991
Creator: Wos, Larry; Winker, S.; McCune, W.; Overbeek, R.; Lusk, E.; Stevens, R. et al.
Partner: UNT Libraries Government Documents Department
open access

DC proton beam measurements in a single-solenoid low-energy beam transport system

Description: High current, CW proton accelerators are being considered for a number of applications including disposition of nuclear wastes, reduction of fissionable nuclear material inventories, safe production of critical nuclear materials, and energy production. All these applications require the development of high current, reliable, hydrogen ion injectors. In 1986, a program using CW RFQ technology was undertaken at CRL in collaboration with LANL and was continued there until 1993. During this time, an… more
Date: September 1, 1994
Creator: Stevens, R. R. Jr.; Schafstall, P.; Schneider, J. D.; Sherman, J.; Zaugg, T. & Taylor, T.
Partner: UNT Libraries Government Documents Department
open access

Structured hints : extracting and abstracting domain expertise.

Description: We propose a new framework for providing information to help optimize domain-specific application codes. Its design addresses problems that derive from the widening gap between the domain problem statement by domain experts and the architectural details of new and future high-end computing systems. The design is particularly well suited to program execution models that incorporate dynamic adaptive methodologies for live tuning of program performance and resource utilization. This new framework,… more
Date: March 16, 2009
Creator: Hereld, M.; Stevens, R.; Sterling, T.; Gao, G. R.; Science, Mathematics and Computer; Tech., California Inst. of et al.
Partner: UNT Libraries Government Documents Department
open access

Systems Biology Knowledgebase for a New Era in Biology A Genomics:GTL Report from the May 2008 Workshop

Description: Biology has entered a systems-science era with the goal to establish a predictive understanding of the mechanisms of cellular function and the interactions of biological systems with their environment and with each other. Vast amounts of data on the composition, physiology, and function of complex biological systems and their natural environments are emerging from new analytical technologies. Effectively exploiting these data requires developing a new generation of capabilities for analyzing an… more
Date: March 1, 2009
Creator: Gregurick, S.; Fredrickson, J. K. & Stevens, R.
Partner: UNT Libraries Government Documents Department
open access

Measurement of polynuclear aromatic hydrocarbon concentrations in the plume of Kuwait oil well fires

Description: Following their retreat from Kuwait during February and March of 1991, the Iraqi Army set fire to over 500 oil wells dispersed throughout the Kuwait oil fields. During the period of sampling from July to August 1991, it was estimated that between 3.29 {times} 10{sup 6} barrels per day of crude oil were combusted. The resulting fires produced several plumes of black and white smoke that coalesced to form a composite ``super`` plume. Because these fires were uncontrolled, significant quantities o… more
Date: March 1, 1995
Creator: Olsen, K.B.; Wright, C.W.; Veverka, C.; Ball, J.C. & Stevens, R.
Partner: UNT Libraries Government Documents Department
open access

Application performation evaluation of the HTMT architecture.

Description: In this report we summarize findings from a study of the predicted performance of a suite of application codes taken from the research environment and analyzed against a modeling framework for the HTMT architecture. We find that the inward bandwidth of the data vortex may be a limiting factor for some applications. We also find that available memory in the cryogenic layer is a constraining factor in the partitioning of applications into parcels. The architecture in several examples may be inade… more
Date: February 23, 2004
Creator: Hereld, M.; Judson, I. R. & Stevens, R.
Partner: UNT Libraries Government Documents Department
open access

Confinement Vessel Dynamic Analysis

Description: A series of hydrodynamic and structural analyses of a spherical confinement vessel has been performed. The analyses used a hydrodynamic code to estimate the dynamic blast pressures at the vessel's internal surfaces caused by the detonation of a mass of high explosive, then used those blast pressures as applied loads in an explicit finite element model to simulate the vessel's structural response. Numerous load cases were considered. Particular attention was paid to the bolted port connections a… more
Date: August 1, 1999
Creator: Stevens, R. Robert & Rojas, Stephen P.
Partner: UNT Libraries Government Documents Department
open access

Preliminary Report on Methods of Analysis for Very Small Percentages of Uranium 0002

Description: Abstract: Procedures are presented in detail of two methods for the determination of very small percentages of uranium (down to 0.002%). The methods are applicable to a wide variety of materials. Notes on the methods and confirmatory experiments are also given.
Date: July 1945
Creator: Foster, M. D.; Grimaldi, F. S. & Stevens, R. E.
Partner: UNT Libraries Government Documents Department
open access

Preliminary Report on Methods of Analysis for very Small Percentages of Uranium

Description: Abstract: Procedures are presented in detail of two methods for the determination of very small percentages or uranium (down to 0.0025). The methods are applicable to a wide variety of materials. Notes on the methods and confirmatory experiments are also given.
Date: August 8, 1983
Creator: Foster, H. D.; Grimaldi, F. S. & Stevens, R. M.
Partner: UNT Libraries Government Documents Department
open access

Studies on the Alkalinity of Some Silicate Minerals

Description: Abstract: By grinding minerals under water it has been found that they yield relative and reproducible measurements of the hydrogenion concentration resulting from their hydrolysis. Many silicate minerals and two glasses have been studied in this way by a colorimetric method of determining hydrogen-ion concentration, and some of them have been studied more quantitatively by means of the hydrogen electrode. The results of these tests are a rough index of the weathering qualities of different sil… more
Date: 1934
Creator: Stevens, R. E.
Partner: UNT Libraries Government Documents Department
open access

Containment vessel dynamic analysis. Part 1: Base configuration

Description: This report describes the approach and methods used in the analysis of a containment vessel that is being designed for use at the Dual-Axis Radiographic Hydrodynamic Test Facility (DARHT). The vessel will be subjected to transient pressure loads during explosive tests conducted at the facility and is required to contain all of the products of these tests. Computational simulations of the structural response of the vessel have been made using a combination of two numerical techniques: the transi… more
Date: February 1, 1997
Creator: Stevens, R. Robert & Benner, John
Partner: UNT Libraries Government Documents Department
open access

Beam simulations for the H{sup {minus}} upgrade at LANSCE

Description: An upgrade program is being carried out at Los Alamos to increase the peak beam current from the present H{sup {minus}} injector to provide 200 {mu}A average current for the proton storage ring at LANSCE. In order to meet this objective, the injector must provide at least 30% more current than presently available. More optimal operation however, requires a factor of two higher peak current in order to reduce circulating losses in the ring. At these higher currents, a lower beam emittance is nee… more
Date: 1998-08~
Creator: Stevens, R. R. Jr.; Ingalls, W.; Sander, O.; Prichard, B. & Sherman, J.
Partner: UNT Libraries Government Documents Department
open access

Implementation of a distributed multiterabyte storage system

Description: The University of Chicago and Argonne National Laboratory are building a highly distributed storage system to meet the needs of a cross-disciplinary group of scientists and to investigate the issues involved in implementing such a system. The storage system is based on IBM 3590/3494 tape technology managed by ADSM software. High-speed wide-area networking is required to support the distributed user community. NFS, DFS, FTP, and other user access methods are supported. A simulation project under… more
Date: November 24, 1999
Creator: Hereld, M.; Nickless, B. & Stevens, R.
Partner: UNT Libraries Government Documents Department
open access

CAVEComm

Description: Virtual reality has become an increasingly familiar part of the science of visualization and communication of information. This, combined with the increase in connectivity of remote sites via high-speed networks, allows for the development of a collaborative distributed virtual environment. Such an environment enables the development of supercomputer simulations with virtual reality visualizations that can be displayed at multiple sites, with each site interacting, viewing, and communicating ab… more
Date: March 1, 1996
Creator: Disz, T.; Papka, M.; Pellegrino, M. & Stevens, R.
Partner: UNT Libraries Government Documents Department
open access

Development of a toroidal-filter H{sup {minus}} ion source

Description: High brightness H{sup {minus}} ion beams will be required for the next generation of accelerator-driven, neutron spallation sources. Volume H{sup {minus}} ion sources have the potential for providing these beams at high duty factor with moderate beam currents and with the long-term operational stability and reliability needed. The authors report on the results of a continuing study of the LANL version of a toroidal-filter, volume H{sup {minus}} ion source which was designed to provide such beam… more
Date: September 1, 1995
Creator: Stevens, R. R. Jr.; York, R. L.; Geisik, C. & Swenson, D. R.
Partner: UNT Libraries Government Documents Department
open access

Tank characterization report for single-shell tank 241-C-109

Description: This document provides the characterization information and interprets the data for Single-Shell Tank 241-C-109. Single-Shell Tank 241-C-109 is an underground storage tank containing high-level radioactive waste. It is located in the C Tank Farm in the Hanford Site`s 200 East Area. The tank was sampled in September of 1992 to address the Ferrocyanide Unreviewed Safety Question. Analyses of tank waste were also performed to support Hanford Federal Facility Agreement and Consent Order Milestone M… more
Date: February 1, 1995
Creator: DiCenso, A. T.; Amato, L. C.; Lambie, R. W.; Franklin, J. D.; Seymour, B. J.; Johnson, K. W. et al.
Partner: UNT Libraries Government Documents Department
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