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The Odem-Edroy Times (Odem, Tex.), Vol. 58, No. 19, Ed. 1 Thursday, May 13, 2004
Weekly newspaper from Odem, Texas that includes local, state, and national news along with advertising.
Date:
May 13, 2004
Creator:
Perez, Jerry
Object Type:
Newspaper
System:
The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 34, No. 20, Ed. 1 Thursday, May 13, 2004
Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with advertising.
Date:
May 13, 2004
Creator:
Judson, Mary
Object Type:
Newspaper
System:
The Portal to Texas History
Hondo Anvil Herald (Hondo, Tex.), Vol. 118, No. 20, Ed. 1 Thursday, May 13, 2004
Weekly newspaper from Hondo, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 13, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 70, Ed. 1 Sunday, June 13, 2004
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 13, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Number of Waste Package Hit by Igneous Intrusion
The purpose of this scientific analysis report is to document calculations of the number of waste packages that could be damaged in a potential future igneous event through a repository at Yucca Mountain. The analyses include disruption from an intrusive igneous event and from an extrusive volcanic event. This analysis supports the evaluation of the potential consequences of future igneous activity as part of the total system performance assessment for the license application (TSPA-LA) for the Yucca Mountain Project (YMP). Igneous activity is a disruptive event that is included in the TSPA-LA analyses. Two igneous activity scenarios are considered: (1) The igneous intrusion groundwater release scenario (also called the igneous intrusion scenario) considers the in situ damage to waste packages or failure of waste packages that occurs if they are engulfed or otherwise affected by magma as a result of an igneous intrusion. (2) The volcanic eruption scenario depicts the direct release of radioactive waste due to an intrusion that intersects the repository followed by a volcanic eruption at the surface. An igneous intrusion is defined as the ascent of a basaltic dike or dike system (i.e., a set or swarm of multiple dikes comprising a single intrusive event) to …
Date:
October 13, 2004
Creator:
Wallace, M.
Object Type:
Report
System:
The UNT Digital Library
Filterability of Monosodium Titanate Supplied by Blue Grass Chemical Specialties
The design specification for monosodium titanate (MST) requires that less than 1 per cent of the particles are larger than 35 micron and that less than 1 per cent of the particles are smaller than 1 micron. Blue Grass Chemical Specialties produced two batches of MST for the Defense Waste Processing Facility (DWPF) that do not meet the particle size specification. The material has more than 1 per cent of the particles smaller than 1 micron. This increase in the fraction of particles less than 1 micron could adversely affect filtration within the Actinide Removal Project (ARP). The authors conducted dead-end filtration testing with 0.45 micron polymeric filter media, 0.5 micron Mott sintered stainless steel filter media, and 0.1 micron Mott sintered stainless steel filter media. The authors make the following recommendations for MST particle size. If a 0.5 micron Mott filter is used for the ARP process, the existing particle size specification (less than 1 per cent of particles less than 1 micron and less than 1 per cent of particles greater than 35 micron) should be maintained. If a 0.1 micron Mott filter is used for the ARP process and the existing particle size specification is not met, …
Date:
April 13, 2004
Creator:
POIRIER, MICHAEL R.
Object Type:
Report
System:
The UNT Digital Library
Measurement of the Internal Magnetic Field of Plasmas using an Alpha Particle Source
The internal magnetic fields of plasmas can be measured under certain conditions from the integrated v x B deflection of MeV alpha particles emitted by a small radioactive source. This alpha source and large-area alpha particle detector would be located inside the vacuum vessel but outside the plasma. Alphas with a typical energy of 5.5 MeV (241Am) can reach the center of almost all laboratory plasmas and magnetic fusion devices, so this method can potentially determine the q(r) profile of tokamaks or STs. Orbit calculations, background evaluations, and conceptual designs for such a vxB (or ''AVB'') detector are described.
Date:
May 13, 2004
Creator:
Zweben, S. J.; Darrow, D. S.; Ross, P. W.; Lowrance, J. L. & Renda, G.
Object Type:
Report
System:
The UNT Digital Library
"Coulomb Glasses"
This is a final report on DE-FG03-00ER45843 entitled ''Coulomb Glasses''. The work is continuing under grant DE-FG02-04ER46107 under the DOE Chicago Operations office. During the award period from August 15, 2000 to December 31, 2003, they studied the following: (1) 1/f Noise in Coulomb Glasses; (2) Coulomb glass phase transitions as a function of positional disorder; (3) a new structural probe of the structural glass transition; and (4) frequency dependence and equilibration of the specific heat of glass forming liquids.
Date:
December 13, 2004
Creator:
Yu, Clare
Object Type:
Report
System:
The UNT Digital Library
A hydrologic view on Biot's theory of poroelasticity
The main objective of this work is to obtain a simplified asymptotic representation of the reflection of seismic signal from a fluid-saturated porous medium in the low-frequency domain. In the first part, we derive the equations of low-frequency harmonic waves in a fluid-saturated elastic porous medium from the basic concepts of filtration theory. We demonstrate that the obtained equations can be related to the poroelasticity model of Frenkel-Gassmann-Biot, and to pressure diffusion model routinely used in well test analysis as well. We thus try to put the poroelastic and filtration theories on the same ground. We study the reflection of a low-frequency signal from a plane interface between elastic and elastic fluid-saturated porous media. We obtain an asymptotic scaling of the frequency-dependent component of the reflection coefficient with respect to a dimensionless parameter depending on the frequency of the signal and the reservoir fluid mobility. We also investigate the impact of the relaxation time and tortuosity on this scaling.
Date:
January 13, 2004
Creator:
Silin, D.B.; Korneev, V.A.; Goloshubin, G.M. & Patzek, T.W.
Object Type:
Report
System:
The UNT Digital Library
Optimized Loading for Particle-in-cell Gyrokinetic Simulations
The problem of particle loading in particle-in-cell gyrokinetic simulations is addressed using a quadratic optimization algorithm. Optimized loading in configuration space dramatically reduces the short wavelength modes in the electrostatic potential that are partly responsible for the non-conservation of total energy; further, the long wavelength modes are resolved with good accuracy. As a result, the conservation of energy for the optimized loading is much better that the conservation of energy for the random loading. The method is valid for any geometry and can be coupled to optimization algorithms in velocity space.
Date:
May 13, 2004
Creator:
Lewandowski, J.L.V.
Object Type:
Report
System:
The UNT Digital Library
OpenAD : algorithm implementation user guide.
Research in automatic differentiation has led to a number of tools that implement various approaches and algorithms for the most important programming languages. While all these tools have the same mathematical underpinnings, the actual implementations have little in common and mostly are specialized for a particular programming language, compiler internal representation, or purpose. This specialization does not promote an open test bed for experimentation with new algorithms that arise from exploiting structural properties of numerical codes in a source transformation context. OpenAD is being designed to fill this need by providing a framework that allows for relative ease in the implementation of algorithms that operate on a representation of the numerical kernel of a program. Language independence is achieved by using an intermediate XML format and the abstraction of common compiler analyses in Open-Analysis. The intermediate format is mapped to concrete programming languages via two front/back end combinations. The design allows for reuse and combination of already implemented algorithms. We describe the set of algorithms and basic functionality currently implemented in OpenAD and explain the necessary steps to add a new algorithm to the framework.
Date:
May 13, 2004
Creator:
Utke, J.
Object Type:
Report
System:
The UNT Digital Library
How to study weakly coupled neutral vector bosons
A weakly coupled new neutral gauge boson, forming a narrow resonance, can be efficiently produced at e{sup +}e{sup -} colliders through radiative return processes if the collider energy is larger than the gauge boson mass. This contribution analyzes the sensitivity of a future linear collider for weakly coupled gauge bosons and briefly discusses how, in case of discovery, its properties can be determined with high precision.
Date:
August 13, 2004
Creator:
afreitas@fnal.gov, Ayres Freitas
Object Type:
Article
System:
The UNT Digital Library
Observation of a High Performance Operating Regime with Small Edge-Localized Modes in the National Spherical Torus Experiment
We report observation of a high performance scenario in the National Spherical Torus Experiment with very small edge-localized modes (ELMs). These ELMs have no measurable impact on stored energy and are consistent with high bootstrap current operation with line average density approaching Greenwald scaling. The ELM perturbation is observed to typically originate near the lower divertor region, as opposed to the outer midplane for ELMs described in the literature. If extrapolable, this scenario would provide an attractive operating regime for next step fusion experiments
Date:
May 13, 2004
Creator:
Maingi, R.; Tritz, K.; Fredrickson, E. D.; Menard, J. E.; Sabbagh, S. A.; Stutman, D. et al.
Object Type:
Report
System:
The UNT Digital Library
Solid State Neutral Particle Analyzer Array on NSTX
A Solid State Neutral Particle Analyzer (SSNPA) array has been installed on the National Spherical Torus Experiment (NSTX). The array consists of four chords viewing through a common vacuum flange. The tangency radii of the viewing chords are 60, 90, 100, and 120 cm. They view across the three co-injection neutral beam lines (deuterium, 80 keV (typ.) with tangency radii 48.7, 59.2, and 69.4 cm) on NSTX and detect co-going energetic ions. A silicon photodiode used was calibrated by using a mono-energetic deuteron beam source. Deuterons with energy above 40 keV can be detected with the present setup. The degradation of the performance was also investigated. Lead shots and epoxy are used for neutron shielding to reduce handling any hazardous heavy metal. This method also enables us to make an arbitrary shape to be fit into the complex flight tube.
Date:
May 13, 2004
Creator:
Shinohara, K.; Darrow, D. S.; Roquemore, A. L.; Medley, S. S. & Cecil, F. E.
Object Type:
Report
System:
The UNT Digital Library
Phenomenology of Compressional Alfven Eigenmodes
Coherent oscillations with frequency 0.3 {le} {omega}/{omega}{sub ci} {le} 1, are seen in the National Spherical Torus Experiment [M. Ono, S.M. Kaye, Y-K.M. Peng, et al., Nucl. Fusion 40, 557 (2000)]. This paper presents new data and analysis comparing characteristics of the observed modes to the model of compressional Alfven eigenmodes (CAE). The toroidal mode number has been measured and is typically between 7 < n < 9. The polarization of the modes, measured using an array of four Mirnov coils, is found to be compressional. The frequency scaling of the modes agrees with the predictions of a numerical 2-D code, but the detailed structure of the spectrum is not captured with the simple model. The fast ion distribution function, as calculated with the beam deposition code in TRANSP [R.V. Budny, Nucl. Fusion 34, 1247 (1994)], is shown to be qualitatively consistent with the constraints of the Doppler-shifted cyclotron resonance drive model. This model also predicts the observed scaling of the low frequency limit for CAE.
Date:
May 13, 2004
Creator:
Fredrickson, E. D.; Gorelenkov, N. N. & Menard, J.
Object Type:
Report
System:
The UNT Digital Library
Global analysis of inclusive B decays
In light of the large amount of new experimental data, we revisit the determination of |V{sub cb}| and m{sub b} from inclusive semileptonic and radiative B decays. We study shape variables to order {Lambda}{sub QCD}{sup 3}/m{sub b}{sup 3} and {alpha}{sub s}{sup 2}{beta}{sub 0}, and include the order {alpha}{sub s} {Lambda}{sub QCD}/m{sub b} correction to the hadron mass spectrum in semileptonic decay, which improves the agreement with the data. We focus on the 1S and kinetic mass schemes for the b quark, with and without expanding m{sub b}-m{sub c} in HQET. We perform fits to all available data from BABAR, BELLE, CDF, CLEO, and DELPHI, discuss the theoretical uncertainties, and compare with earlier results. We find |V{sub cb}| = (41.9 {+-} 0.6 {+-} 0.1{sub {tau}{sub B}}) x 10{sup -3} and m{sub b}{sup 1S} = 4.68 {+-} 0.04GeV, including our estimate of the theoretical uncertainty in the fit.
Date:
August 13, 2004
Creator:
Bauer, Christian W.; Ligeti, Zoltan; Luke, Michael; Manohar, Aneesh & Trott, Michael
Object Type:
Article
System:
The UNT Digital Library
Complete photo-fragmentation of the deuterium molecule
All properties of molecules, from binding and excitation energies to their geometry, are determined by the highly correlated initial state wavefunction of the electrons and nuclei. Perhaps surprisingly, details of these correlations can be revealed by studying the break-up of these systems into their constituents. The fragmentation might be initiated by the absorption of a single photon [1, 2, 3, 4, 5, 6], collision with a charged particle [7, 8] or exposure to a strong laser pulse [9, 10]. If the exciting interaction is sufficiently understood, one can use the fragmentation process as a tool to learn about the bound initial state [11, 12]. However, often the interaction and the fragment motions pose formidable challenges to quantum theory [13, 14, 15]. Here we report the coincident measurement of the momenta of both nuclei and both electrons from the single photon induced fragmentation of the deuterium molecule. The results reveal that the correlated motion of the electrons is strongly dependent on the inter-nuclear separation in the molecular ground state at the instant of photon absorption.
Date:
May 13, 2004
Creator:
Weber, Thorsten; Czasch, Achim O.; Jagutzki, Ottmar; Muller, Alkis K.; Mergel, Volker; Kheifets, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Recommendations for Additional Design Development of Components for the SpinTek Rotary Microfilter Prior to Radioactive Service
The SpinTek rotary microfilter is being considered as an alternative to crossflow filtration. Prior testing evaluated the vendor's standard design for a 1-disk and 3-disk design. We noted several areas of improvement during the testing of the two filter systems that can be included in the 25-disk plant size unit.This report outlines several potential enhancements and improvements to the vendor's standard design which would extend the lifetime of the unit and increase the ability to perform maintenance for units deployed in radioactive service. The enhancements proposed in this report can be implemented to the current design with minimal impact to the cost and schedule of the purchase of the standard unit. An example of this is the replacement of the current mechanical seal with a bellows seal. The improvements proposed will require an extensive redesign of components found in the current system such as the filter chamber.
Date:
February 13, 2004
Creator:
Herman, D.T.
Object Type:
Report
System:
The UNT Digital Library
Method of Determining the Extent to which a Nickel Structure has been Attached by a Fluorine-Containing Gas
The method of determining the extent to which a nickel structure has been attacked by a halogen containing gas to which it has been exposed which comprises preparing a quantity of water substantially free from dissolved oxygen, passing ammonia gas through a cuprammonium solution to produce ammonia substantially free from oxygen, dissolving said oxygen-free ammonia in said water to produce a saturated aqueous ammonia solution free from uncombined oxygen, treating at least a portion of said nickel structure of predetermined weight with said solution to dissolve nickel compounds from the surface of said structure without dissolving an appreciable amount of said nickel and analyzing the resulting solution to determine the quantity of said nickel compounds that was associated with said said portion of said structure to determine the proportion of combined nickel in said nickel structure.
Date:
July 13, 2004
Creator:
Brusie, James P.
Object Type:
Patent
System:
The UNT Digital Library
Unconventional Magnetic Behavior in Multicomponent Compounds
This funding supported investigations of the behavior of complex materials. Very often the chosen materials were structurally complex, since in such cases more and new degrees of freedom that lead to more complicated interactions and more variable behavior. We summarize the most successful parts of that research: (1) implementation of Wannier functions to obtain magnetic coupling constants in magnetic insulators; (2) quasiparticle (single-particle excitation) studies of LiH under high pressure; (3) time-dependent density functional theory applied to study energy loss processes in superconducting MgB2.
Date:
December 13, 2004
Creator:
Pickett, Warren E.
Object Type:
Report
System:
The UNT Digital Library
Miniature Chemical Sensor
A new chemical detection technology has been realized that addresses DOE environmental management needs. The new technology is based on a variant of the sensitive optical absorption technique, cavity ring-down spectroscopy (CRDS). Termed evanescent-wave cavity ring-down spectroscopy (EW-CRDS), the technology employs a miniature solid-state optical resonator having an extremely high Q-factor as the sensing element, where the high-Q is achieved by using ultra-low-attenuation optical materials, ultra-smooth surfaces, and ultra-high reflectivity coatings, as well as low-diffraction-loss designs. At least one total-internal reflection (TIR) mirror is integral to the resonator permitting the concomitant evanescent wave to probe the ambient environment. Several prototypes have been designed, fabricated, characterized, and applied to chemical detection. Moreover, extensions of the sensing concept have been explored to enhance selectivity, sensitivity, and range of application. Operating primarily in the visible and near IR regions, the technology inherently enables remote detection by optical fiber. Producing 11 archival publications, 5 patents, 19 invited talks, 4 conference proceedings, a CRADA, and a patent-license agreement, the project has realized a new chemical detection technology providing >100 times more sensitivity than comparable technologies, while also providing practical advantages.
Date:
December 13, 2004
Creator:
Pipino, Andrew C. R.
Object Type:
Report
System:
The UNT Digital Library
Immiscibility in the NiFe2O4-NiCr2O4 Spinel Binary
The solid solution behavior of the Ni(Fe{sub 1-n}Cr{sub n}){sub 2}O{sub 4} spinel binary is investigated in the temperature range 400-1200 C. Non-ideal solution behavior, as exhibited by non-linear changes in lattice parameter with changes in n, is observed in a series of single-phase solids air-cooled from 1200 C. Air-annealing for one year at 600 C resulted in partial phase separation in a spinel binary having n = 0.5. Spinel crystals grown from NiO, Fe{sub 2}O{sub 3} and Cr{sub 2}O{sub 3} reactants, mixed to give NiCrFeO{sub 4}, by Ostwald ripening in a molten salt solvent, exhibited single phase stability down to about 750 C (the estimated consolute solution temperature, T{sub cs}). A solvus exists below T{sub cs}. The solvus becomes increasingly asymmetric at lower temperatures and extrapolates to n values of 0.2 and 0.7 at 300 C. The extrapolated solvus is shown to be consistent with that predicted using a primitive regular solution model in which free energies of mixing are determined entirely from changes in configurational entropy at room temperature.
Date:
August 13, 2004
Creator:
Ziemniak, S
Object Type:
Article
System:
The UNT Digital Library
SIAM Conference on Life Sciences Portland, OR July 11-14, 2004
None
Date:
September 13, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Stress Corrosion Cracking of the Drip Shield, the Waste Package Outer Barrier, and the Stainless Steel Structural Material
Stress corrosion cracking is one of the most common corrosion-related causes for premature breach of metal structural components. Stress corrosion cracking is the initiation and propagation of cracks in structural components due to three factors that must be present simultaneously: metallurgical susceptibility, critical environment, and static (or sustained) tensile stresses. This report was prepared according to ''Technical Work Plan for: Regulatory Integration Modeling and Analysis of the Waste Form and Waste Package'' (BSC 2004 [DIRS 171583]). The purpose of this report is to provide an evaluation of the potential for stress corrosion cracking of the engineered barrier system components (i.e., the drip shield, waste package outer barrier, and waste package stainless steel inner structural cylinder) under exposure conditions consistent with the repository during the regulatory period of 10,000 years after permanent closure. For the drip shield and waste package outer barrier, the critical environment is conservatively taken as any aqueous environment contacting the metal surfaces. Appendix B of this report describes the development of the SCC-relevant seismic crack density model (SCDM). The consequence of a stress corrosion cracking breach of the drip shield, the waste package outer barrier, or the stainless steel inner structural cylinder material is the initiation and …
Date:
October 13, 2004
Creator:
Gordon, G.
Object Type:
Report
System:
The UNT Digital Library