486 Matching Results

Search Results

Results: 1 - 24 next
open access

SPEAKEASY-3: the SPEAKEASY system

Description: SPEAKEASY has continued to evolve and grow in power. The current production versions, referred to as SPEAKEASY-3, contain many features that have not been formally documented. The needed documentation for the most important of these features is provided in this report. Individual new words that are now available are explained and illustrated in accompanying sample runs. Because of the growing use of the language in interactive situations, emphasis is placed on explaining facilities oriented to … more
Date: February 15, 1972
Creator: Cohen, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Luminescence studies of oxygen absorption on thorium

Description: The interaction of oxygen with a thorium metal surface is being studied by monitoring the luminescence of thorium in an electron beam. By combining luminescence measurements with Auger electron spectroscopy data, it is possible to distinguish between processes that depend upon the oxygen pressure at the sample surface, and those that depend only upon the amount of adsorbed oxygen.
Date: February 15, 1977
Creator: Bastasz, R.; Colmenares, C. A.; Smith, R. L. & Somorjai, G. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Develop nickel--zinc battery suitable for electric vehicle propulsion. Task A: design and cost study

Description: A three-month design and cost study for the use of nickel--zinc batteries in electric vehicles is presented. Battery configuration is analyzed, and expected performance is set forth. Current development problems concern component materials and capacity decline on cycling, electrolyte maintenance, and thermal characteristics. The manufacturing process is outlined, and estimates are made for cost, materials requirements, capital needs, etc. 61 figures, 24 tables. (RWR)
Date: February 15, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling of cladding and fuel motion in a loss of flow situation for GCFR safety analysis. Progress report 6, October 15, 1975--January 15, 1976

Description: The first experiments have been run using electrically heated, simulated fuel elements in an inert gas (argon) loop. The fuel elements have a chopped cosine power input and have a Pb/Sn alloy cladding. Single elements were used in the first two experiments with a step power pulse of about 1 kW/ft which was sufficient to melt the center of the clad within 8 to 10 sec. As the molten cladding entered the blanket (unheated) region, it froze within about 1 inch. The apparatus for the stainless steel… more
Date: February 15, 1976
Creator: Eggen, D. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Biphase turbine bottoming cycle for a diesel engine

Description: Application of a two-phase turbine system to waste heat recovery was examined. Bottoming cycle efficiencies ranging from 15 to 30% were calculated for a 720/sup 0/F diesel exhaust temperature. A single stage demonstration unit, designed for non-toxic fluids (water and DowTherm A) and for atmospheric seals and bearings, had a cycle efficiency of 23%. The net output power was 276 hp at 8,100 rpm, increasing the total shaft power from 1,800 hp for the diesel alone, to 2,076 hp for the combined sys… more
Date: February 15, 1977
Creator: Ahmad, S. & Hays, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nuclear safety characterization of sodium fires and fast reactor fission products. Quarterly technical progress report, October--December 1975

Description: Progress is summarized in the areas of SOMIX code development, simulated fuel element source term studies, aerosol leakage tests and calculations, fuel and fission product release from burning sodium, aerosol source term from vaporized fuel properties of high temperature fuel mixtures, and aerosol source from MCFI.
Date: February 15, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Subsea nuclear power generating stations for offshore oil production operations. Preliminary safety and licensing information document

Description: This document presents preliminary safety and licensing information relating to the manufacture, installation, and operation of small subsea nuclear generating stations in remote offshore locations, and the associated onshore base-site activities of reactor refueling and system refurbishment at 4-year intervals. The purpose of the proposed facilities is to provide a subsea power capability for offshore oil production operations in areas where surface conditions, water depths, or other environme… more
Date: February 15, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lawrence Livermore National Laboratory East Avenue/Emergency Response Planning Traffic Study

Description: The Lawrence Livermore National Laboratory (LLNL) and the Sandia National Laboratory (SNL) are located at the eastern end of the City of Livermore. Recently the research facilities have been placed on heightened security alerts due to the events of September 11. To respond to the security concerns, LLNL and SNL have proposed to place East Avenue between South Vasco Road and Greenville Road under administrative control. This type of control would require security check points at both ends of thi… more
Date: February 15, 2002
Creator: Schmiegel, T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical and Chemical Analytical Analysis: A key component of Bioforensics

Description: The anthrax letters event of 2001 has raised our awareness of the potential importance of non-biological measurements on samples of biological agents used in a terrorism incident. Such measurements include a variety of mass spectral, spectroscopic, and other instrumental techniques that are part of the current armamentarium of the modern materials analysis or analytical chemistry laboratory. They can provide morphological, trace element, isotopic, and other molecular ''fingerprints'' of the age… more
Date: February 15, 2005
Creator: Velsko, S P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Calculating Contained Firing Facility (CFF) Explosive Firing Zones

Description: Revision 1 of this document presented a method of calculating the CFF explosive firing zones that was based upon the peak average pressure on the various elements of the firing chamber as explosive weights and locations are changed. That document was reviewed internally at LLNL and reviewed by the design contractor of the facility. The contractor's responses generally confirmed the validity of the peak average pressure method, but noted that the shearing stresses at haunches may exceed the desi… more
Date: February 15, 2001
Creator: Lyle, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Density Measurements of Be Shells

Description: The purpose of this memo is to lay out the uncertainties associated with the measurement of density of Be ablators by the weigh and volume method. I am counting on the readers to point out any faulty assumptions about the techniques or uncertainties associated with them. Based on the analysis presented below we should expect that 30 {micro}m thick shells will have an uncertainty in the measured density of about 2% of the value, coming more or less equally from the mass and volume measurement. T… more
Date: February 15, 2005
Creator: Cook, R C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Software Demonstration of 'rap': Preparing CAD Geometries for Overlapping Grid Generation

Description: We demonstrate the application code ''rap'' which is part of the ''Overture'' library. A CAD geometry imported from an IGES file is first cleaned up and simplified to suit the needs of mesh generation. Thereafter, the topology of the model is computed and a water-tight surface triangulation is created on the CAD surface. This triangulation is used to speed up the projection of points onto the CAD surface during the generation of overlapping surface grids. From each surface grid, volume grids ar… more
Date: February 15, 2002
Creator: Anders Petersson, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Influence of Selected Liquid and Soil Properties on the Propagation of Spills over Flat Permeable Surfaces

Description: In an effort to determine spill characteristics, information about a spill's spatial distribution with time is being studied. For permeable surfaces, spill phenomenology is controlled by liquid and soil properties, the most relevant of which are presented in this report. The pertinent liquid and soil properties were tabulated for ten liquids and four soils. The liquids represented an array of organic compounds, some of which are or are soon to be documented in the liquid spectra library by the … more
Date: February 15, 2005
Creator: Keller, Jason M. & Simmons, Carver S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long-term, One-dimensional Simulation of Lower Snake River Temperatures for Current and Unimpounded Conditions

Description: The objective of the study was to compare water temperatures in the Lower Snake River for current (impounded) and unimpounded conditions using a mathematical model of the river system. A long-term analysis was performed using the MASS1 one-dimensional (1D) hydrodynamic and water quality model. The analysis used historical flows and meteorological conditions for a 35-year period spanning between 1960 and 1995. Frequency analysis was performed on the model results to calculate river temperatures … more
Date: February 15, 2001
Creator: Perkins, William A. & Richmond, Marshall C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High-Pressure, Solid-State Experiments for NIF

Description: In this report, we summarize our plan for using NIF for measuring solid-state deformation physics at very high pressures, P >> 1 Mbar. There are several key uncertainties, the strength and phase being two of them. The deformation mechanisms at high pressure and high strain rate are also uncertain. The state, as well as strength, of a material that has first been melted, then dynamically refrozen by high-pressure compression is very uncertain. There is no single facility that can address a… more
Date: February 15, 2001
Creator: Remington, B.; Belak, J.; Colvin, J.; Edwards, J.; Kalantar, D.; Lasinski, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Inverse Scattering Approach to Improving Pattern Recognition

Description: The Helmholtz machine provides what may be the best existing model for how the mammalian brain recognizes patterns. Based on the observation that the ''wake-sleep'' algorithm for training a Helmholtz machine is similar to the problem of finding the potential for a multi-channel Schrodinger equation, we propose that the construction of a Schrodinger potential using inverse scattering methods can serve as a model for how the mammalian brain learns to extract essential information from sensory dat… more
Date: February 15, 2005
Creator: Chapline, G & Fu, C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ENDF/B-V1 Coupled Photon-Electron Data for Use in Radiation Shielding Applications

Description: In radiation shielding applications we need photon and electron data, as well as computer codes that utilize these data, in order to predict results inexpensively and safely. In this paper we will first cover the current status of available photon and electron data that have only recently been adopted for inclusion in ENDF/B-VI, with emphasis on the improved detail that is included in these data bases. Next we will cover the availability of these data bases and computer codes that use them.
Date: February 15, 2002
Creator: Cullen, D E & MacFarlane, R E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ceramic Laser Materials

Description: Transparent ceramic materials have several major advantages over single crystals in laser applications, not the least of which is the ability to make large aperture parts in a robust manufacturing process. After more than a decade of working on making transparent YAG:Nd, Japanese workers have recently succeeded in demonstrating samples that performed as laser gain media as well as their single crystal counterparts. Since then several laser materials have been made and evaluated. For these reaso… more
Date: February 15, 2005
Creator: Soules, T F; Clapsaddle, B J; Landingham, R L & Schaffers, K I
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Small Optical Components for the National Ignition Facility

Description: The National Ignition Facility will be the largest laser system in the world. The facility, currently under construction, requires over 25,000 small optical components. The small-optics requirements and latest procurement strategy will be presented.
Date: February 15, 2000
Creator: Taylor, J R; Chow, R & Bissinger, H D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Alternative Conceptual Model for Colloid Generation from Commercial Spent Nuclear Fuel

Description: Colloids have the potential to transport strongly sorbing radionuclide contaminants in soils and groundwater aquifers. Recent studies from the Nevada Test Site have indicated the enhanced mobility plutonium, albeit in minute quantities, associated with various silicate minerals (Kersting et al., 1999); however, significant colloidal transport of thorium (Th) and rare earths (RE) in nature, considered to be chemical analogs for plutonium, is rare. Yet, the current Yucca Mountain model for colloi… more
Date: February 15, 2004
Creator: Buck, Edgar C.; McNamara, Bruce K. & Hanson, Brady D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The crystal structure of Rv1347c, a putative antibiotic resistance protein from Mycobacterium tuberculosis, reveals a GCN5-related fold and suggests an alternative function in siderophore biosynthesis

Description: Mycobacterium tuberculosis, the cause of TB, is a devastating human pathogen. The emergence of multi-drug resistance in recent years has prompted a search for new drug targets and for a better understanding of mechanisms of resistance. Here we focus on the gene product of an open reading frame from M. tuberculosis, Rv1347c, which is annotated as a putative aminoglycoside N-acetyltransferase. The Rv1347c protein does not show this activity, however, and we show from its crystal structure, couple… more
Date: February 15, 2005
Creator: Card, G. L.; Peterson, N. A.; Smith, C. A.; Rupp, B.; Schick, B. M. & Baker, E. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

100 Areas, February 5--February 11

Description: This report gives the weekly status for the B, D, and F piles. Also given is the reactivity status at the end of the week for each pile. Process water control and pressure drop studies are discussed. Finally a brief discussion is given of the graphite expansion problem.
Date: February 15, 1946
Creator: Jordan, W. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hanford Laboratories Operation, monthly activities report, January 1958

Description: This document presents a summary of work and progress at the Hanford Engineer Works for January, 1958. The report is divided into sections by department. A plant wide general summary is included at the beginning of the report, after which the departmental summaries begin. The manufacturing Department reports plant statistics, and summaries for the Metal Preparation, Reactor and separation sections. The Engineering Department`s section summarizes work for the Technical, Design, and Project secti… more
Date: February 15, 1958
Creator: Parker, H. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen