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Nanoscale Twinning and Martensitic Transformation in Shock-Deformed BCC Metals

Description: Shock-induced twinning and martensitic transformation in BCC-based polycrystalline metals (Ta and U-6wt%Nb) have been observed and studied using transmission electron microscopy (TEM). The length-scale of domain thickness for both twin lamella and martensite phase is found to be smaller than 100 nm. While deformation twinning of {l_brace}112{r_brace}<111>-type is found in Ta when shock-deformed at 15 GPa, both twinning and martensitic transformation are found in Ta when shock-deformed at … more
Date: March 22, 2005
Creator: Hsiung, L L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of fluoride in NTS groundwaters on the aqueous speciation of U, Np, Pu, Am and Eu

Description: To address SNJV concerns that fluoride in Nevada Test site (NTS) groundwaters may impact radionuclide speciation and transport, NTS water quality databases were obtained and scanned for analyses with high fluoride concentrations (> 10 mg/L). The aqueous speciation of nine representative samples of these groundwaters with added trace amounts of uranium (U), neptunium (Np), plutonium (Pu), americium (Am) and europium (Eu) was then calculated with the computer code EQ3NR assuming a temperature … more
Date: March 22, 2005
Creator: Bruton, C J & Nimz, G J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis Summary of an Assembled Western U.S. Dataset

Description: The dataset for this report is described in Walter et al. (2004) and consists primarily of Nevada Test Site (NTS) explosions, hole collapse and earthquakes. In addition, there were several earthquakes in California and Utah; earthquakes recorded near Cataract Creek, Arizona; mine blasts at two areas in Arizona; and two mine collapses in Wyoming. In the vicinity of NTS there were mainshock/aftershock sequences at Little Skull Mt, Scotty's Junction and Hector ere mine. All the events were shallow… more
Date: March 22, 2005
Creator: Ryall, F
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Strain Relaxation in Si{sub 1-x}Ge{sub x} Thin Films on Si(100) Substrates: Modeling and Comparisons with Experiments

Description: Strained semiconductor thin films grown epitaxially on semiconductor substrates of different composition, such as Si{sub 1-x}Ge{sub x}/Si, are becoming increasingly important in modern microelectronic technologies. In this paper, we report a hierarchical computational approach for analysis of dislocation formation, glide motion, multiplication, and annihilation in Si{sub 1-x}Ge{sub x} epitaxial thin films on Si substrates. Specifically, a condition is developed for determining the critical film… more
Date: March 22, 2005
Creator: Kolluri, K; Zepeda-Ruiz, L A; Murthy, C S & Maroudas, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ON OPTIMIZATION OF THE DISPERSIVE SECTION STRENGTH IN HGHG FREE ELECTRON LASER

Description: In HGHG FEL the optimum strength of dispersive section is determined by the maximum bunching that beam obtains after interaction with seed laser. In this paper we present a simple semi-analytic expression of the required dispersive section strength for a wide range of laser power, intrinsic energy spread and harmonic number.
Date: March 22, 2005
Creator: STAFTAN, T. & YU, L. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Obtaining Identical Results on Varying Numbers of Processors In Domain Decomposed particle Monte Carlo Simulations

Description: Domain decomposed Monte Carlo codes, like other domain-decomposed codes, are difficult to debug. Domain decomposition is prone to error, and interactions between the domain decomposition code and the rest of the algorithm often produces subtle bugs. These bugs are particularly difficult to find in a Monte Carlo algorithm, in which the results have statistical noise. Variations in the results due to statistical noise can mask errors when comparing the results to other simulations or analytic res… more
Date: March 22, 2005
Creator: Gentile, N A; Kalos, M H & Brunner, T A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laboratory Directed Research and Development Program FY2004

Description: The Ernest Orlando Lawrence Berkeley National Laboratory (Berkeley Lab or LBNL) is a multi-program national research facility operated by the University of California for the Department of Energy (DOE). As an integral element of DOE's National Laboratory System, Berkeley Lab supports DOE's missions in fundamental science, energy resources, and environmental quality. Berkeley Lab programs advance four distinct goals for DOE and the nation: (1) To perform leading multidisciplinary research in the… more
Date: March 22, 2005
Creator: Hansen, Todd C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GHG Mitigation Potential, Costs and Benefits in Global Forests: ADynamic Partial Equilibrium Approach

Description: This paper reports on the global potential for carbonsequestration in forest plantations, and the reduction of carbonemissions from deforestation, in response to six carbon price scenariosfrom 2000 to 2100. These carbon price scenarios cover a range typicallyseen in global integrated assessment models. The world forest sector wasdisaggregated into tenregions, four largely temperate, developedregions: the European Union, Oceania, Russia, and the United States; andsix developing, mostly tropical,… more
Date: March 22, 2005
Creator: Sathaye, Jayant; Makundi, Willy; Dale, Larry; Chan, Peter & Andrasko, Kenneth
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Image Content Engine (ICE): A System for Fast Image Database Searches

Description: The Image Content Engine (ICE) is being developed to provide cueing assistance to human image analysts faced with increasingly large and intractable amounts of image data. The ICE architecture includes user configurable feature extraction pipelines which produce intermediate feature vector and match surface files which can then be accessed by interactive relational queries. Application of the feature extraction algorithms to large collections of images may be extremely time consuming and is lau… more
Date: March 22, 2005
Creator: Brase, J M; Paglieroni, D W; Weinert, G F; Grant, C W; Lopez, A S & Nikolaev, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Target Selection and Deselection at the Berkeley StructuralGenomics Center

Description: At the Berkeley Structural Genomics Center (BSGC), our goalis to obtain a near-complete structural complement of proteins in theminimal organisms Mycoplasma genitalium and M. pneumoniae, two closelyrelated pathogens. Current targets for structure determination have beenselected in six major stages, starting with those predicted to be mosttractable to high throughput study and likely to yield new structuralinformation. We report on the process used to select these proteins, aswell as our target … more
Date: March 22, 2005
Creator: Chandonia, John-Marc; Kim, Sung-Hou & Brenner, Steven E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Systematic Regional Trend in Helium Isotopes Across the NorthernBasin and Range Province, Western North America

Description: An extensive study of helium isotopes in fluids collectedfrom surface springs, fumaroles and wells across the northern Basin andRange Province reveals a systematic trend of decreasing 3He/4He ratiosfrom west to east. The western margin of the Basin and Range ischaracterized by mantle-like ratios (6-8 Ra) associated with active orrecently active crustal magma systems (e.g. Coso, Long Valley, Steamboat,and the Cascade volcanic complex). Moving towards the east, the ratiosdecline systematically to… more
Date: March 22, 2005
Creator: Kennedy, B. Mack & van Soest, Matthijs C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Techniques for qualitative and quantitative measurement of aspects of laser-induced damage important for laser beam propagation

Description: Characterizing laser-induced damage in optical materials is important for laser design and operation. Previous methods of evaluating optical materials damage resistance to high-power laser irradiation have typically suffered from shot to shot uncertainties in laser energy output and/or have insufficient sensitivity. More importantly such methods do not address the aspects of laser-induced damage important to laser beam propagation, namely the amount of light scattered by the damage. We present … more
Date: March 22, 2005
Creator: Carr, C. W.; Feit, M. D.; Nostrand, M. C. & Adams, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Title X Family Planning Program

Description: This report discusses Title X of the Public Health Service Act. The program, enacted in 1970, is the only federal program devoted solely to family planning and related preventive health services. Although the authorization for Title X ended with FY1985, funding for the program has been provided through bills that provide appropriations for the Departments of Labor, Health and Human Services, and Education, and Related Agencies.
Date: March 22, 2005
Creator: Coleman, Sharon K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Agriculture and FY2006 Budget Reconciliation

Description: This report compares and contrasts the differences in House and Senate action on a FY2006 budget resolution. The report details that both bills would require cuts to mandatory programs within each committee's jurisdiction. Although no cuts will be required until a conference agreement on the resolution is reached.
Date: March 22, 2005
Creator: Chite, Ralph M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical and Electronic Properties Changed by Aging Plutonium

Description: Plutonium, because of its radioactive nature, ages from the ''inside out'' by means of self-irradiation damage and thus produces Frankel-type defects and defect clusters. The defects resulting from the residual lattice damage and helium in-growth could result in microstructural, electronic, and physical property changes. This paper presents volume, density, and electronic property change observed from both naturally and accelerated aged plutonium alloys. Accelerated alloys are plutonium alloys … more
Date: March 22, 2005
Creator: Chung, B. W.; Tobin, J. G.; Thompson, S. R. & Ebbinghaus, B. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical Studies of Fluid Leakage from a Geologic DisposalReservoir for CO2 Show Self-Limiting Feedback between Fluid Flow and HeatTransfer

Description: Leakage of CO2 from a hypothetical geologic storage reservoir along an idealized fault zone has been simulated, including transitions between supercritical, liquid, and gaseous CO2. We find strong non-isothermal effects due to boiling and Joule-Thomson cooling of expanding CO2. Leakage fluxes are limited by limitations in conductive heat transfer to the fault zone. The interplay between multiphase flow and heat transfer effects produces non-monotonic leakage behavior.
Date: March 22, 2005
Creator: Pruess, Karsten
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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