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Evaluation of near field rock treatment during constructions (LADSfeature #22)

Description: The purpose of this report is to evaluate the effect of near-field rock treatment by injection of reactive material (calcite) above the drift for the purpose of decreasing postclosure drift seepage. The method used for the calculation was a coupled reaction-transport numerical model for gas-water-rock interaction. This includes the mass conservation of heat, liquid and gas for thermohydrological calculations, of aqueous and gaseous species for advective and diffusive transport, and the kinetics… more
Date: November 24, 1998
Creator: Sonnenthal, Eric & Spycher, Nicolas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Clean Water Act Issues in the 106th Congress

Description: In the 106th Congress, no comprehensive activity on reauthorizing the Clean Water Act occurred, although a number of individual clean water bills were enacted. Other issues have been debated recently, such as reforming the law to provide regulatory relief for industry, states and cities, and individual landowners. The debate over many of these issues highlights differing views of the Act and its implementation by some who seek to strengthen existing requirements and others who believe that cost… more
Date: November 24, 1998
Creator: Copeland, Claudia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Environmental Effects in Advanced Intermetallics

Description: This paper provides a comprehensive review of environmental embrittlement in iron and nickel aluminizes. The embrittlement involves the interaction of these intermetallics with moisture in air and generation of atomic hydrogen, resulting in hydrogen-induced embrittlement at ambient temperatures. Environmental embrittlement promotes brittle grain-boundary fracture in Ni{sub 3}Al alloys but brittle cleavage fracture in Fe{sub 3}Al-FeAl alloys. The embrittlement strongly depends on strain rate, wi… more
Date: November 24, 1998
Creator: Liu, C.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron heat transport in improved confinement discharges in DIII-D

Description: In DIII-D tokamak plasmas with an internal transport barrier (ITB), the comparison of gyrokinetic linear stability (GKS) predictions with experiments in both low and strong negative magnetic shear plasmas provide improved understanding for ion and electron thermal transport within much of the plasma. As previously reported, the region for improved ion transport seems well characterized by the condition OE~B>Y-, where SERB is the ExB flow shear, calculated from measured quantities, and y,, is th… more
Date: November 24, 1998
Creator: Stallard, B. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Moldable Transient Suppression Polymer Composite

Description: The objective of the CRADA was to cooperate in the development of a moldable transient suppression polymer composite that can be used to protect electrical equipment and electronics from damage caused by electrical disturbances and faults. The composite was to provide a solid- state means of fault current limitation, particularly for high-current applications. The composite was envisioned to have the following properties: (1) be moldable and therefore suited to the automated manufacture at a lo… more
Date: November 24, 1998
Creator: Campbell, V. B. & Modine, F. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Uranium (VI) Sorption and Transport in Unsaturated, Subsurface Hanford Site Sediments - Effect of Moisture Content and Sediment Texture: Final Report for Subtask 2b

Description: A series of experiments were conducted in fiscal year 1998 at the Pacific Northwest National Laboratory as part of the Immobilized Low-Activity Waste-Performance Assessment. These experiments evaluated the sorption and transport of uranium, U(VI), under conditions of partial moisture saturation that are relevant to arid region burial sites and vadose-zone far-field conditions at the Hanford Site. The focus was on measuring breakthrough curves (from which distribution coefficient [K{sub d}] valu… more
Date: November 24, 1998
Creator: Gamerdinger, A.P.; Resch, C.T. & Kaplan, D.I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ethanol Demand in United States Gasoline Production

Description: The Oak Ridge National Laboratory (OWL) Refinery Yield Model (RYM) has been used to estimate the demand for ethanol in U.S. gasoline production in year 2010. Study cases examine ethanol demand with variations in world oil price, cost of competing oxygenate, ethanol value, and gasoline specifications. For combined-regions outside California summer ethanol demand is dominated by conventional gasoline (CG) because the premised share of reformulated gasoline (RFG) production is relatively low and b… more
Date: November 24, 1998
Creator: Hadder, G.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical Kinetics for Modeling Silicon Epitaxy from Chlorosilanes

Description: A reaction mechanism has been developed that describes the gas-phas 0971 and surface reactions involved in the chemical vapor deposition of Si from chlorosilanes. Good agreement with deposition rate data from a single wafer reactor with no wafer rotation has been attained over a range of gas mixtures, total flow rates, and reactor temperatures.
Date: November 24, 1998
Creator: Balakrishna, A.; Chacin, J.M.; Comita, P.B.; Haas, B.; Ho, P. & Thilderkvist, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advanced Diagnostics for Developing High-Brightness Electron Beams

Description: The production of high-brightness particle beams calls for the development of advanced beam diagnostics. High brightness beams, meaning beams with a high density in phase space, are important for many applications, such as short-wavelength Free-Electron Lasers and advanced accelerator systems. A diagnostic that provides detailed information on the density distribution of the electron bunch in multi-dimensional phase-space is an essential tool for obtaining small emittance at a high charge. This… more
Date: November 24, 1998
Creator: Ben-Zvi, Ilan; Babzien, M.; Malone, R.; Wang, X. J. & Yakimenko, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

U.S.-Russian experts NATO collaborative research grant exchange visit meeting on excess Pu ceramics formulations and characterizations

Description: This document contains the agenda and meeting notes. Topics of discussion included US Pu disposition ceramics activities, Russian experience and proposals in Pu ceramics, and development of possible Russian ceramic proposals or collaborations.
Date: November 24, 1998
Creator: Jardine, L.J., LLNL
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Instruction-Level Characterization of Scientific Computing Applications Using Hardware Performance Counters

Description: Workload characterization has been proven an essential tool to architecture design and performance evaluation in both scientific and commercial computing areas. Traditional workload characterization techniques include FLOPS rate, cache miss ratios, CPI (cycles per instruction or IPC, instructions per cycle) etc. With the complexity of sophisticated modern superscalar microprocessors, these traditional characterization techniques are not powerful enough to pinpoint the performance bottleneck of … more
Date: November 24, 1998
Creator: Luo, Y. & Cameron, K.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solar Buildings: Transpired Air Collectors

Description: Transpired air collectors preheat building ventilation air by using the building's ventilation fan to draw fresh air through the system. The intake air is heated as it passes through the perforated absorber plate and up the plenum between the absorber and the south wall of the building. Reduced heating costs will pay for the systems in 3--12 years.
Date: November 24, 1998
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Mathematical Model of a Lithium/Thionyl Chloride Battery

Description: A mathematical model of a spirally wound lithium/thionyl chloride primary battery has been developed ~d used for parameter estimation and design studies. The model formulation is based on the fimdarnental Consemation laws using porous electrode theory and concentrated solution theory. The model is used to estimate the difision coefficient and the kinetic parameters for the reactions at the anode and the cathode as a function of temperature. These parameters are obtained by fitting the simulated… more
Date: November 24, 1998
Creator: Jain, M.; Jungst, R. G.; Nagasubramanian, G. & Weidner, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Initial Stages of Yield in Nanoindentation

Description: We have used the Interracial Force Microscope" to perform nanoindentations on Au single- crystal surfaces. We have observed two distinct regimes of plastic deformation which are distinguished by the magnitude of discontinuities in load relaxation. At lower stresses, relaxation occurs in small deviations from elastic behavior, while at the higher stresses they take the form of large load drops often resulting in complete relaxation of the applied load. These major events create a relatively wide… more
Date: November 24, 1998
Creator: Houston, J. E.; Jarausch, K. F.; Kiely, J. D. & Russell, P. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advanced Diagnostics for Developing High-Brightness Electron Beams.

Description: The production of high-brightness particle beams calls for the development of advanced beam diagnostics. High brightness beams, meaning beams with a high density in phase space, are important for many applications, such as short-wavelength Free-Electron Lasers and advanced accelerator systems. A diagnostic that provides detailed information on the density distribution of the electron bunch in multi-dimensional phase-space is an essential tool for obtaining small emittance at a high charge. This… more
Date: November 24, 1998
Creator: Ben-Zvi, Ilan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser Surface Profiler

Description: By accurately measuring the angle of reflection of a laser beam incident on a reflective surface with a position sensitive detector, changes in the surface normal direction (slope of the surface) can be determined directly. An instrument has been built that makes repeated measurements over the surface, and uses this data to produce a grayscale image of the slope. The resolution of this system to changes in the surface normal direction is found to be better than 0.01 degrees. By focusing the Ias… more
Date: November 24, 1998
Creator: Butler, M. A. & Chu, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

InGaAsN Solar Cells with 1.0eV Bandgap, Lattice Matched to GaAs

Description: The design, growth by metal-organic chemical vapor deposition, and processing of an In{sub 0.07}Ga{sub 0.93}As{sub 0.98}N{sub 0.02} solar Al, with 1.0 ev bandgap, lattice matched to GaAs is described. The hole diffusion length in annealed, n-type InGaAsN is 0.6-0.8 pm, and solar cell internal quantum efficiencies > 70% arc obwined. Optical studies indicate that defects or impurities, from InGAsN doping and nitrogen incorporation, limit solar cell performance.
Date: November 24, 1998
Creator: Allerman, A. A.; Banas, J. J.; Gee, J. M.; Hammons, B. E.; Jones, E. D. & Kurtz, S. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Variations in the Nature of Metal Adsorption on Ultrathin Al(2)O(3) Films

Description: First-principles density-functional calculations are used to study metal adsorption (Li, K, Y, Nb, Ru, Pd, Pt, Cu, Ag, Au, and Al at 1/3-4 monolayer coverages) atop 5 ~ A1203 films on Al(Ill). The oxide-metal bond is ionic at Iow coverages but, with interesting exceptions, caused by polari@i ,~-cE!vED at high coverages where the overlayer is metallic. Binding trends are explained in terms of s'imp e concepts. Increasing overlayer thickness can cause the adsorbate-oxide interface structure to th… more
Date: November 24, 1998
Creator: Bogicevic, Alexander & Jennison, Dwight R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SunLab: Concentrating Solar Power Program Overview

Description: DOE's Concentrating Solar Power (CSP) program is collaborating with its partners in the private sector to develop two new solar technologies -- power towers and dish/engines -- to meet the huge commercial potential for solar power. Concentrating solar power plants produce electric power by first converting the sun's energy into heat, and then to electricity in a conventional generator.
Date: November 24, 1998
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Melvin Calvin: Fuels from Plants

Description: A logical extension of his early work on the path of carbon during photosynthesis, Calvin's studies on the production of hydrocarbons by plants introduced many in the scientific and agricultural worlds to the potential of renewable fuel and chemical feedstocks. He and his co-workers identified numerous candidate compounds from plants found in tropical and temperate climates from around the world. His travels and lectures concerning the development of alternative fuel supplies inspired laborator… more
Date: November 24, 1998
Creator: Taylor, S. E. & Otvos, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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