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Primordial Compositions of Refractory Inclusions

Description: Bulk chemical and oxygen, magnesium and silicon isotopic compositions were measured for each of 17 Types A and B refractory inclusions from CV3 chondrites. After bulk chemical compositions were corrected for non-representative sampling in the laboratory, the Mg and Si isotopic compositions of each inclusion were used to calculate its original chemical composition assuming that the heavy-isotope enrichments of these elements are due to Rayleigh fractionation that accompanied their evaporation fr… more
Date: February 20, 2008
Creator: Grossman, L.; Simon, S. B.; Rai, V. K.; Thiemens, M. H.; Hutcheon, I. D.; Williams, R. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Simulation Strategies for Shock-Turbulence Interactions

Description: The computational challenge of predicting shock-turbulence interactions stems from the fundamentally different physics at play. Shock waves are microscopically thin regions wherein flow properties change rapidly over a distance roughly equal to the molecular mean free path; hence, they are essentially strong discontinuities in the flow field. Turbulence, on the other hand, is a chaotic phenomenon with broadband spatial and temporal scales of motion. Most shock-capturing methods rely on strong n… more
Date: February 20, 2008
Creator: Cook, A; Larsson, J; Cabot, W & Lele, S K
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fluor Hanford, Inc. Groundwater and Technical Integration Support (Master Project) Quality Assurance Management Plan

Description: The scope of the Fluor Hanford, Inc. Groundwater and Technical Integration Support (Master Project) is to provide technical and integration support to Fluor Hanford, Inc., including operable unit investigations at 300-FF-5 and other groundwater operable units, strategic integration, technical integration and assessments, remediation decision support, and science and technology. This Quality Assurance Management Plan provides the quality assurance requirements and processes that will be followed… more
Date: February 20, 2008
Creator: Fix, N. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY 2007 Miniature Spherical Retroreflectors Final Report

Description: Miniature spherical retroreflectors, less than 8 millimeters in diameter, are currently being developed to enhance remote optical detection of nuclear proliferation activities. These retroreflecting spheres resemble small, sand-colored marbles that have the unique optical property of providing a strong reflection directly back to the source (i.e., retroreflecting) when illuminated with a laser. The addition of specific coatings, sensitive to specific chemicals or radioactive decay in the enviro… more
Date: February 20, 2008
Creator: Anheier, Norman C.; Bernacki, Bruce E. & Krishnaswami, Kannan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nevada Test Site-Directed Research and Development, FY 2007 Report

Description: The Nevada Test Site-Directed Research and Development (SDRD) program completed a very successful year of research and development activities in FY 2007. Twenty-nine new projects were selected for funding this year, and eight projects started in FY 2006 were brought to conclusion. The total funds expended by the SDRD program were $5.67 million, for an average per-project cost of $153 thousand. An external audit conducted in September 2007 verified that appropriate accounting practices were appl… more
Date: February 20, 2008
Creator: Wil Lewis, editor
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling of Laser-Induced Metal Combustion

Description: Experiments involving the interaction of a high-power laser beam with metal targets demonstrate that combustion plays an important role. This process depends on reactions within an oxide layer, together with oxygenation and removal of this layer by the wind. We present an analytical model of laser-induced combustion. The model predicts the threshold for initiation of combustion, the growth of the combustion layer with time, and the threshold for self-supported combustion. Solutions are compared… more
Date: February 20, 2008
Creator: Boley, C D & Rubenchik, A M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Response to "Comment on ' A New Derivation of the Plasma Susceptibility Tensor for a Hot Magnetized Plasma Without Infinite Sums of Products of Bessel Functions'

Description: We welcome the Comment by Lerche et al on our recent paper titled "A new derivation of the plasma susceptibility tensor for a hot magnetized plasma without infinite sums of products of Bessel functions." The Comment brings up additional historical facts about previous research on the infinite sums of products of Bessel functions appearing in the plasma susceptibility.
Date: February 20, 2008
Creator: Hong Qin, Cynthia K. Phillips, and Ronald C. Davidson
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MECHANICAL ALLOYING AND THERMAL TREATMENT FOR PRODUCTION OF ZIRCONIUM IRON HYDROGEN ISOTOPE GETTERS

Description: The objective of this task was to demonstrate that metal hydrides could be produced by mechanical alloying in the quantities needed to support production-scale hydrogen isotope separations. Three starting compositions (ratios of elemental Zr and Fe powders) were selected and attritor milled under argon for times of 8 to 60 hours. In general, milling times of at least 24 hours were required to form the desired Zr{sub 2}Fe and Zr{sub 3}Fe phases, although a considerable amount of unalloyed Zr and… more
Date: February 20, 2008
Creator: Fox, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Research, Monitoring, and Evaluation for the Federal Columbia River Estuary Program.

Description: The purpose of this document is to describe research, monitoring, and evaluation (RME) for the Federal Columbia River Estuary Program, hereafter called 'the Estuary Program'. The intent of this RME effort is to provide data and information to evaluate progress toward meeting program goals and objectives and support decision making in the Estuary Program. The goal of the Estuary Program is to understand, conserve, and restore the estuary ecosystem to improve the performance of listed salmonid po… more
Date: February 20, 2008
Creator: Johnson, Gary E. & Diefenderfer, Heida L. (Pacific Northwest National Laboratory)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water-Soluble 2-Hydroxyisophthalamides for Sensitization of Lanthanide Luminescence

Description: A series of octadentate ligands featuring the 2-hydroxyisophthalamide (IAM) antenna chromophore (to sensitize Tb(III) and Eu(III) luminescence) has been prepared and characterized. The length of the alkyl amine scaffold that links the four IAM moieties has been varied in order to investigate the effect of the ligand backbone on the stability and photophysical properties of the Ln(III) complexes. The amine backbones utilized in this study are N,N,N{prime},N{prime}-tetrakis-(2-aminoethyl)-ethane-… more
Date: February 20, 2008
Creator: Samuel, Amanda P. S.; Moore, Evan G.; Melchior, Marco; Xu, Jide & Raymond, Kenneth N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-ray Spectral Measurements and Collisional Radiative Modeling of Hot, High-Z Plasmas at the Omega Laser

Description: M-Band and L-Band Gold spectra between 3 to 5 keV and 8 to 13 keV, respectively, have been recorded by a photometrically calibrated crystal spectrometer. The spectra were emitted from the plasma in the laser deposition region of a 'hot hohlraum'. This is a reduced-scale hohlraum heated with {approx} 9 kJ of 351 nm light in a 1 ns square pulse at the Omega laser. The space- and time-integrated spectra included L-Band line emission from Co-like to Ne-like gold. The three L-Band line features were… more
Date: February 20, 2008
Creator: May, M. J.; Schneider, M. B.; Hansen, S. B.; Chung, H.; Hinkel, D. E.; Baldis, H. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

China-U.S. Trade Issues

Description: This report mainly focuses on China-U.S. Trade Issues. China-U.S. ties have expanded substantially over the past several years. China overtook Japan to become the third-largest U.S .Export market and overtook Canada to become the Largest source of U.S imports.
Date: February 20, 2008
Creator: Morrison, Wayne M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Pollution Control Laws: How Are They Enforced?

Description: This report provides an overview of the statutory framework, key players, infrastructure, resources, tools, and operations associated with enforcement and compliance of the major pollution control laws and regulations administered by EPA.
Date: February 20, 2008
Creator: Esworthy, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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