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Quantitative Microanalysis with high Spatial Resolution: Application of FEG-DTEM XEDS Microanalysis to the Characterization of Complex Microstructures in Irradiated Low Alloy Steet

Description: To assist in the characterization of microstructural changes associated with irradiation damage in low alloy steels, the technique of quantitative x-ray mapping using a field emission gun scanning transmission electron microscope (FEG-STEM) equipped with an x-ray energy Dispersive spectrometer (XEDS) has been employed. Quantitative XEDS microanalyses of the matrix and grain boundaries of irradiated specimens have been compared with previous quantitative analyses obtained using 3D-Atom Probe Fie… more
Date: November 14, 2001
Creator: Williams, D.B., Watanabe, M. and Burke, M.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mechanical properties of D0 Run IIB silicon detector staves

Description: A proposed stave design for the D0 Run IIb silicon tracker outer layers featuring central cooling channels and a composite shell mechanical structure is evaluated for self-deflection and deflection due to external loads. This paper contains an introduction to the stave structure, a section devoted to composite lamina and laminate properties and finally a section discussing the beam deflections expected for assembled staves using these laminates.
Date: June 14, 2001
Creator: Lanfranco, Giobatta & Fast, James
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Waveguide Fabrication in Fused Silica Using Tightly Focused Femtosecond Laser Pulses

Description: Refractive index changes have been induced inside bulk fused silica by using femtosecond (fs) laser pulses tightly focused inside the material. Waveguides have been fabricated inside the glass by scanning the glass with respect to the focal point of the laser beam. The refractive index change is estimated to be {approx} 10{sup -4}. Other more complex three-dimensional structures have also been fabricated (curved waveguides, splitters, and interferometers). We also report on fluorescence spectro… more
Date: December 14, 2001
Creator: Chan, J W; Huser, T; Risbud, S H & Krol, D M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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FY2001 Annual Report for EMSP Project #70108: Effects of Fluid Distribution on Measured Geophysical Properties for Partially Saturated, Shallow Subsurface Conditions

Description: Our goal is to improve geophysical imaging of the vadose zone. We will achieve this goal by providing new methods to improve interpretation of field data. The purpose of this EMSP project is to develop relationships between laboratory measured geophysical properties and porosity, saturation, and fluid distribution, for partially saturated soils. Algorithms for relationships between soil composition, saturation, and geophysical measurements will provide new methods to interpret geophysical field… more
Date: June 14, 2001
Creator: Berge, P. A.; Bonner, B. P.; Roberts, J. J.; Wildenschild, D.; Aracne-Ruddle, C. M.; Berryman, J. G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New Technology Demonstration Program - Results of an Attempted Field Test of Full-Spectrum Polarized Lighting in a Mail Processing/Office Space

Description: An assessment of the potential energy savings associated with the use of full-spectrum polarized lighting in a work space was initiated as part of the Department of Energy's (DOE) Federal Energy Management Program (FEMP) New Technology Demonstration Program (NTDP) in 1997. This project was intended to provide information on the effectiveness and application of this technology that could help federal energy managers and other interested individuals determine whether this technology had benefits … more
Date: June 14, 2001
Creator: Richman, Eric E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hanford Site Annual Treatability Studies Report: Calendar Year 2000

Description: This report provides information required to be reported annually by the Washington Administrative Code (WAC) 173-303-071 (3)(r)(ii)(F) and (3)(s)(ix) on the treatability studies conducted on the Hanford Site in 2000. These studies were conducted as required by WAC 173-303-071, ?Excluded Categories of Waste,? sections (3)(r) and (s). Unless otherwise noted, the waste samples were provided by and the treatability studies were performed for the U.S. Department of Energy, Richland Operations Offic… more
Date: February 14, 2001
Creator: McCoy, Michael W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New Technology Demonstration Program - Results of an Attempted Field Test of Multi-Layer Light Polarizing Panels in an Office Space

Description: An assessment of the potential energy savings associated with the use of multi-layer light polarizing panels in an office space was initiated as part of the Department of Energy's (DOE) Federal Energy Management Program (FEMP) New Technology Demonstration Program (NTDP) in 1997. This project was intended to provide information on the effectiveness and application of this technology that could help federal energy managers and other interested individuals determine whether this technology had ben… more
Date: June 14, 2001
Creator: Richman, Eric E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Stacktail Magic Numbers

Description: This note will tabulate the desired phase and delay offsets for a Stacktail Momentum beam transfer function measurement as a function of beam energy and pickup leg. These phase and delay offsets were computed from beam transfer functions made around April 14, 2000. The StackTail system with these offsets will have a gain slope of about 10 MeV.
Date: March 14, 2001
Creator: McGinnis, Dave
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Metal Carbonyl-Hydrosilane Reactions and Hydrosilation Catalysis

Description: Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a siloxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Three relevant catalytic reactions are shown. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(C0){sub 4}MnR [L = CO, PPh{sub 3}; R = COCH{su… more
Date: April 14, 2001
Creator: Cutler, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spectroscopic and Microscopic Characterization of Contaminant Uptake and Retention by Carbonates in Soils and Vadose Zone Sediments

Description: Historical releases and subsequent migration of toxic metals and radionuclides within the soil and vadose zone at various sites over the DOE Complex pose serious technological challenges, including the design and implementation of cost-effective remediation and/or monitoring strategies. This requires knowledge of the fundamental processes that govern contaminant mobility and reactivity with their host materials. The main research objective of this project is to assess the effectiveness of uptak… more
Date: June 14, 2001
Creator: Reeder, Richard J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

In Situ Field Testing of Processes

Description: The purpose of this Analysis/Model Report (AMR) is to update and document the data and subsequent analyses from ambient field-testing activities performed in underground drifts of the Yucca Mountain Site Characterization Project (YMP). This revision updates data and analyses presented in the initial issue of this AMR. This AMR was developed in accordance with the ''Technical Work Plan for Unsaturated Zone (UZ) Flow and Transport Process Model Report'' and ''Technical Work Plan for UZ Flow, Tran… more
Date: December 14, 2001
Creator: Wang, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced High Resolution Seismic Imaging, Material Properties Estimation and Full Wavefield Inversion for the Shallow Subsurface

Description: Develop and test advanced near vertical to wide-angle seismic methods for structural imaging and material properties estimation of the shallow subsurface for environmental characterization efforts.
Date: June 14, 2001
Creator: Levander, A.; Zelt, C. A. & Symes, W. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microbially Mediated Immobilization of Contaminants Through In Situ Biostimulation: Scale up of EMSP Project 55267

Description: The overall goal of the proposed research is to provide an improved understanding and predictive capability of the mechanisms that allow metal-reducing bacteria to be effective in the bioremediation of redox sensitive toxic metals and radionuclides. The study is motivated by the likelihood that subsurface metal-reducing bacteria can be stimulated to effectively alter the redox state of contaminants so that they are immobilized in situ for long time periods. The work described in this proposal w… more
Date: June 14, 2001
Creator: Jardine, Philip M. & Fendorf, Scott E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HISTORY OF THE ENGINEERING PHYSICS AND MATHEMATICS DIVISION 1955-1993

Description: A review of division progress reports noting significant events and findings of the Applied Nuclear Physics, Neutron Physics, Engineering Physics, and then Engineering Physics and Mathematics divisions from 1955 to 1993 was prepared for use in developing a history of the Oak Ridge National Laboratory in celebration of its 50th year. The research resulted in an accumulation of historic material and photographs covering 38 years of effort, and the decision was made to publish a brief history of t… more
Date: September 14, 2001
Creator: Maskewitz, B.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A study of sediment motion and bottom boundary layer dynamics over the Middle Atlantic Bight shelf and upper slope. Final report

Description: This report summarizes research on circulation and particle dynamics over the Middle Atlantic Bight shelf and upper slope. It includes an overview of the field experiments conducted in the waters off North Carolina, and gives the principal results from these experiments.
Date: February 14, 2001
Creator: Churchill, James H. & Williams, Albert J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Metal carbonyl-hydrosilane reactions and hydrosilation catalysis. Final report for period May 1, 1995 - August 14, 1999

Description: Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a doxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(CO){sub 4}MnR [L = CO, PPh{sub 3}; R = COCH{sub 3}, COPh, CH{sub 3}] and (b) halides (CO){sub … more
Date: April 14, 2001
Creator: Cutler, Alan R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New insights in third phase formation in the U(VI)-HNO{sub 3}, TBP-alkane system.

Description: In this work, the system U(VI)-HNO{sub 3}-tributylphosphate (TBP)-n-dodecane has been revisited with the objective of gaining coordination chemistry and structural information on the species that are formed in the organic phase before and after third phase formation. Chemical analyses, spectroscopic and EXAFS data indicate that U(VI) is extracted as the UO{sub 2}(NO{sub 3}){sub 2} {center_dot} 2TBP adduct, while the third phase species has the composition UO{sub 2}(NO{sub 3}){sub 2} {center_dot… more
Date: June 14, 2001
Creator: Jensen, M. P.; Chiarizia, R.; Ferraro, J. R.; Borkowski, M.; Nash, K. L.; Thiyagarajan, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A spatial time series framework for modeling daily precipitationat regional scales

Description: In this paper, a framework for stochastic spatiotemporal modeling of daily precipitation in a hindcast mode is presented. Observed precipitation levels in space and time are modeled as a joint realization of a collection of space-indexed time series, one for each spatial location. Time series model parameters are spatially varying, thus capturing space-time interactions. Stochastic simulation, i.e., the procedure of generating alternative precipitation realizations (synthetic fields) over the s… more
Date: November 14, 2001
Creator: Kyriakidis, Phaedon C.; Miller, Norman L. & Kim, Jinwon
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Seeing atoms only 0.78A apart

Description: The one-Angstrom microscope (OAM) project at the USDOE's National Center for Electron Microscopy has extended the limits of high-resolution transmission electron microscopy to sub-Angstrom levels. The OAM combines image-processing software with a modified 300keV electron microscope equipped with a highly-coherent field-emission electron gun. We have found that a reduction in the OAM's electron-gun extraction voltage allows us to ''see'' silicon atoms separated by only 0.78A.
Date: March 14, 2001
Creator: O'Keefe, M. A. & Nelson, E. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance

Description: This project involves the design and synthesis of receptors for oxoanions of environmental importance and specifically those found in high level waste tanks. Polyammonium macrocycles as receptors and nitrate as anion were the focus of the first phase of this project. A second phase involved the synthesis of lipophilic amide-based receptors in order to increase the potential for obtaining workable receptors for both separations and sensing applications on site. A three tier approach was employed… more
Date: June 14, 2001
Creator: Bowman-James, Kristin; Wilson, George S. & Moyer, Bruce
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermodynamics of the extraction of selected metal ions by Di(2-ethylhexyl) alkylenediphosphonic acids.

Description: The thermodynamics of extraction of Am(III), Sr(II) and U(VI) from aqueous HNO{sub 3} solutions by o-xylene solutions of p,p'-de(2-ethylhexyl) methylene- (H{sub 2}DEH[MDP]), ethylene-(H{sub 2}DEH[EDP]), and butylene- (H{sub 2}DEH[BuDP]) disphosphonic acids has been studied by the temperature coefficient method in the 25.0 to 60.0 C range. Both extractive aggregation and extraction stoichiometries did not change with temperature. The extraction of Am(III) by H{sub 2}DEH[MDP], and that of U(VI) b… more
Date: June 14, 2001
Creator: Otu, E. O. & Chiarizia, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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