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462 Matching Results
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European Trade Retaliation: The FSC-ETI Case
None
Date:
February 11, 2005
Creator:
Aheam, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Asymmetric injection of cathodic arc plasma into a macroparticlefilter
The cathodic arc plasmas produced by cathode spots usuallyinclude macroparticles, which is undesirable for many applications. Acommon way of removing macroparticles is to use curved solenoid filterswhich guide the plasma from the source to the substrate. In this work, anarc source with relatively small cathode is used, limiting the possiblelocations of plasma production. The relative position of cathodic arcsource and macroparticle filtered was systematically varied and thefiltered plasma current was recorded. It was found that axis-symmetricplasma injection leads to maximum throughput only if an anode aperturewas used, which limited the plasma to near-axis flow by scraping offplasma at larger angles to the axis. When the anode aperture was removed,more plasma could enter the filter. In this case, maximum filtered ioncurrent was achieved when the plasma was injected off-axis, namely offsetin the direction where the filter is curved. Such behavior wasanticipated because the plasma column in the filter is known to beshifted by ExB and centrifugal drift as well as by non-axis-symmetriccomponents of the magnetic field in the filter entrance and exit plane.The data have implications for plasma transport variations caused bydifferent spot locations on cathodes that are not small compared to thefilter cross section.
Date:
February 11, 2004
Creator:
Anders, Andre & MacGill, Robert A.
Object Type:
Article
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 105, No. 283, Ed. 1 Wednesday, February 11, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 11, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 264, Ed. 1 Friday, February 11, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 11, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Kull ALE: I. Unstructured Mesh Advection, Interface Capturing, and Multiphase 2T RHD with Material Interfaces
Several advection algorithms are presented within the remap framework for unstructured mesh ALE codes. The methods discussed include a generic advection scheme based on a finite volume approach, and three groups of algorithms for the treatment of material boundary interfaces. The interface capturing algorithms belong to the Volume of Fluid (VoF) class of methods to approximate material interfaces from the local fractional volume of fluid distribution in arbitrary unstructured polyhedral meshes appropriate for the Kull code. Also presented are several schemes for extending single material radiation diffusion solvers to account for multi-material interfaces.
Date:
February 11, 2002
Creator:
Anninos, P
Object Type:
Report
System:
The UNT Digital Library
Kull ALE: II. Grid Motion on Unstructured Arbitrary Polyhedral Meshes
Several classes of mesh motion algorithms are presented for the remap phase of unstructured mesh ALE codes. The methods range from local shape optimization procedures to more complex variational minimization methods applied to arbitrary unstructured polyhedral meshes necessary for the Kull code.
Date:
February 11, 2002
Creator:
Anninos, P
Object Type:
Report
System:
The UNT Digital Library
The Prospect of using Three-Dimensional Earth Models To Improve Nuclear Explosion Monitoring and Ground Motion Hazard Assessment
The last ten years have brought rapid growth in the development and use of three-dimensional (3D) seismic models of earth structure at crustal, regional and global scales. In order to explore the potential for 3D seismic models to contribute to important societal applications, Lawrence Livermore National Laboratory (LLNL) hosted a 'Workshop on Multi-Resolution 3D Earth Models to Predict Key Observables in Seismic Monitoring and Related Fields' on June 6 and 7, 2007 in Berkeley, California. The workshop brought together academic, government and industry leaders in the research programs developing 3D seismic models and methods for the nuclear explosion monitoring and seismic ground motion hazard communities. The workshop was designed to assess the current state of work in 3D seismology and to discuss a path forward for determining if and how 3D earth models and techniques can be used to achieve measurable increases in our capabilities for monitoring underground nuclear explosions and characterizing seismic ground motion hazards. This paper highlights some of the presentations, issues, and discussions at the workshop and proposes a path by which to begin quantifying the potential contribution of progressively refined 3D seismic models in critical applied arenas.
Date:
February 11, 2008
Creator:
Antoun, T.; Harris, D.; Lay, T.; Myers, S. C.; Pasyanos, M. E.; Richards, P. et al.
Object Type:
Report
System:
The UNT Digital Library
Individuals with Disabilities Education Act (IDEA): Current Funding Trends
CRS Report for Congress entailing information about current funding trends within the Individuals with Disabilities Education Act (IDEA). Topics include, budget requests, federal funding and grants, funding trends, etc..
Date:
February 11, 2005
Creator:
Apling, Richard N.
Object Type:
Report
System:
The UNT Digital Library
Linear-scaling evaluation of the local energy in quantum MonteCarlo
For atomic and molecular quantum Monte Carlo calculations, most of the computational effort is spent in the evaluation of the local energy. We describe a scheme for reducing the computational cost of the evaluation of the Slater determinants and correlation function for the correlated molecular orbital (CMO) ansatz. A sparse representation of the Slater determinants makes possible efficient evaluation of molecular orbitals. A modification to the scaled distance function facilitates a linear scaling implementation of the Schmidt-Moskowitz-Boys-Handy (SMBH) correlation function that preserves the efficient matrix multiplication structure of the SMBH function. For the evaluation of the local energy, these two methods lead to asymptotic linear scaling with respect to the molecule size.
Date:
February 11, 2006
Creator:
Austin, Brian; Aspuru-Guzik, Alan; Salomon-Ferrer, Romelia & Lester Jr., William A.
Object Type:
Article
System:
The UNT Digital Library
Cold Pump Test and Training and Mock Up Facility Feasibility and Need Study
A cold pump test, training, and mock-up facility needs to be acquired and installed to support Tank Waste Retrieval and Disposal (TWR&D). Such a facility would serve useful purposes for the TWR&D, and would also have the capability to provide similar services for other Hanford Site activities.
Date:
February 11, 2000
Creator:
BELLOMY, J.R.
Object Type:
Report
System:
The UNT Digital Library
Cold Pump Test and Training and Mock Up Facility Functions and Requirements
This document defines the functions and requirements (F&R) for a test facility to provide for pre-deployment, checkout, testing, and training for the underground storage tank retrieval equipment, systems, and crews that will be developed or deployed as part of Waste Feed Delivery. The F&R for a River Protection Project retrieval test facility, one that supports a production mode tank farm system, are identified.
Date:
February 11, 2000
Creator:
BELLOMY, J.R.
Object Type:
Report
System:
The UNT Digital Library
Staff Draft Report. Comparative Cost of California Central Station Electricity Generation Technologies.
This Energy Commission staff draft report presents preliminary levelized cost estimates for several generic central-station electricity generation technologies. California has traditionally adopted energy policies that balance the goals of supporting economic development, improving environmental quality and promoting resource diversity. In order to be effective, such policies must be based on comprehensive and timely gathering of information. With this goal in mind, the purpose of the report is to provide comparative levelized cost estimates for a set of renewable (e.g., solar) and nonrenewable (e.g., natural gas-fired) central-station electricity generation resources, based on each technology's operation and capital cost. Decision-makers and others can use this information to compare the generic cost to build specific technology. These costs are not site specific. If a developer builds a specific power plant at a specific location, the cost of siting that plant at that specific location must be considered. The Energy Commission staff also identifies the type of fuel used by each technology and a description of the manner in which the technology operates in the generation system. The target audiences of this report are both policy-makers and anyone wishing to understand some of the fundamental attributes that are generally considered when evaluating the cost …
Date:
February 11, 2003
Creator:
Badr, Magdy & Benjamin, Richard
Object Type:
Report
System:
The UNT Digital Library
Laser Safety Inspection Criteria
A responsibility of the Laser Safety Officer (LSO) is to perform laser safety audits. The American National Standard Z136.1 Safe use of Lasers references this requirement in several sections: (1) Section 1.3.2 LSO Specific Responsibilities states under Hazard Evaluation, ''The LSO shall be responsible for hazards evaluation of laser work areas''; (2) Section 1.3.2.8, Safety Features Audits, ''The LSO shall ensure that the safety features of the laser installation facilities and laser equipment are audited periodically to assure proper operation''; and (3) Appendix D, under Survey and Inspections, it states, ''the LSO will survey by inspection, as considered necessary, all areas where laser equipment is used''. Therefore, for facilities using Class 3B and or Class 4 lasers, audits for laser safety compliance are expected to be conducted. The composition, frequency and rigueur of that inspection/audit rests in the hands of the LSO. A common practice for institutions is to develop laser audit checklists or survey forms. In many institutions, a sole Laser Safety Officer (LSO) or a number of Deputy LSO's perform these audits. For that matter, there are institutions that request users to perform a self-assessment audit. Many items on the common audit list and the associated findings are …
Date:
February 11, 2005
Creator:
Barat, K.
Object Type:
Article
System:
The UNT Digital Library
Lessons Learned Class
Basic laser safety training at Lawrence Livermore National Laboratory (LLNL) is provided through a multiple module web-based course. The web-based course presents a wide and detailed review of laser safety topics including: biological effects, laser protective eyewear, fiber optic laser use, control measures, and more. It opens with a re-enactment of a laser accident. While supportive of this web-based course and actively involved in its development, the NIF Directorate has developed a classroom presentation adjunct to the course for laser users working in NIF. This author considers the LLNL web-based laser safety course to be one of, if not the best, such course available. Still, experience has shown that a ''lessons learned program'' is a great re-enforcer of laser safety. What-is-more, the laser lessons learned class provides important ''face-to-face'' interactions and discussion. The object of the ''laser lessons learned course'' is not to repeat the web course but present laser related lessons learned to the staff. In this author's opinion, lessons learned is the strongest safety re-enforcement one can present to the laser user community. For example, it can show how a practice that might be common to laser users can lead to a dramatic injury and a programmatic long-term …
Date:
February 11, 2005
Creator:
Barat, K.
Object Type:
Article
System:
The UNT Digital Library
Ab Initio Large-Basis No-Core Shell Model
We discuss the motivation, theory, and formulation of the ab initio No-Core Shell Model (NCSM). In this method the effective Hamiltonians are derived microscopically from realistic nucleon-nucleon (NN) and theoretical three-nucleon (NNN) potentials, as a function of the finite harmonic-oscillator (HO) basis space. We present converged results for the A = 3 and 4 nucleon systems, which are in agreement with results obtained by other exact methods, followed by results for p-shell nuclei. Binding energies, rms radii, excitation spectra, and electromagnetic properties are discussed.The favorable comparison with available data is a consequence of the underlying NN and NNN interactions rather than a phenomenological fit.
Date:
February 11, 2005
Creator:
Barrett, B R; Navratil, P; Nogga, A; Ormand, W E; Stetcu, I; Vary, J P et al.
Object Type:
Article
System:
The UNT Digital Library
Neutron Transmission and Capture Measurements and Resonance Parameter Analysis of Neodymium from 1eV to 500 eV
None
Date:
February 11, 2005
Creator:
Barry, DP; Trbovich, MJ; Danon, Y; Block, RC & Slovacek, RE
Object Type:
Article
System:
The UNT Digital Library
DP1 and Completely Continuous Operators
This article demonstrates a relationship between the Dunford-Pettis property and the DP1 property with a similar relationship for vector-valued continuous function spaces.
Date:
February 11, 2003
Creator:
Bator, Elizabeth M. & Slavens, Dawn R.
Object Type:
Article
System:
The UNT Digital Library
Doctoral Recital: 2008-02-11 - Rebecca Beasley, mezzo-soprano
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
February 11, 2008
Creator:
Beasley, Rebecca
Object Type:
Sound
System:
The UNT Digital Library
Biotechnology in Animal Agriculture: Status and Current Issues
This report describes several scientifically emerging animal biotechnologies that are raising a variety of questions concerning risks to humans, animals, and the environment, as well as ethical concerns. The report examines applications of the technologies and discusses major issues that may arise.
Date:
February 11, 2009
Creator:
Becker, Geoffrey S. & Cowan, Tadlock
Object Type:
Report
System:
The UNT Digital Library
Modeling and characterization of recompressed damaged materials
Experiments have been performed to explore conditions under which spall damage is recompressed with the ultimate goal of developing a predictive model. Spall is introduced through traditional gas gun techniques or with laser ablation. Recompression techniques producing a uniaxial stress state, such as a Hopkinson bar, do not create sufficient confinement to close the porosity. Higher stress triaxialities achieved through a gas gun or laser recompression can close the spall. Characterization of the recompressed samples by optical metallography and electron microscopy reveal a narrow, highly deformed process zone. At the higher pressures achieved in the gas gun, little evidence of spall remains other than differentially etched features in the optical micrographs. With the very high strain rates achieved with laser techniques there is jetting from voids and other signs of turbulent metal flow. Simulations of spall and recompression on micromechanical models containing a single void suggest that it might be possible to represent the recompression using models similar to those employed for void growth. Calculations using multiple, randomly distributed voids are needed to determine if such models will yield the proper behavior for more realistic microstructures.
Date:
February 11, 2004
Creator:
Becker, R.; Cazamias, J. U.; Kalantar, D. H.; LeBlanc, M. M. & Springer, H. K.
Object Type:
Report
System:
The UNT Digital Library
Nuclear Nonproliferation Issues
None
Date:
February 11, 2003
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
RESERVOIR CHARACTERIZATION OF THE LOWER GREEN RIVER FORMATION, SOUTHWEST UINTA BASIN, UTAH
Anastamosing, low gradient distributary channels produce {approx}30 gravity, paraffinic oils from the Middle Member of the lacustrine Eocene Green River Formation in the south-central portion of the Uinta Basin. This localized depocenter was situated along the fluctuating southern shoreline of Lake Uinta, where complex deposits of marginal-lacustrine to lower delta plain accumulations are especially characteristic. The Middle Member contains several fining-upward parasequences that can be recognized in outcrop, core, and downhole logs. Each parasequence is about 60 to 120 feet thick and consists of strata deposited during multiple lake level fluctuations that approach 30 to 35 feet in individual thickness. Such parasequences represent 300,000-year cycles based on limited absolute age dating. The subaerial to subaqueous channels commonly possess an erosional base and exhibit a fining upward character. Accordingly, bedding features commonly range from large-scale trough and planar cross bedding or lamination at the base, to a nonreservoir, climbing ripple assemblage near the uppermost reservoir boundary. The best reservoir quality occurs within the laminated to cross-stratified portions, and the climbing ripple phase usually possesses more deleterious micas and/or detrital clays. Diagenesis also exerts a major control on reservoir quality. Certain sandstones were cemented by an early, iron-poor calcite cement, which can …
Date:
February 11, 2003
Creator:
Bereskin, S. Robert
Object Type:
Report
System:
The UNT Digital Library
The Director of National Intelligence and Intelligence Analysis
The 9/11 Commission made a number of recommendations to improve the quality of intelligence analysis. A key recommendation was the establishment of a Director of National Intelligence (DNI) position to manage the national intelligence effort and serve as the principal intelligence adviser to the President — along with a separate director of the Central Intelligence Agency. Subsequently, the Intelligence Reform and Terrorism Prevention Act of 2004, P.L. 108-458, made the DNI the principal adviser to the President on intelligence and made the DNI responsible for coordinating communitywide intelligence estimates. Some observers note that separating the DNI from the analytical offices may complicate the overall analytical effort.
Date:
February 11, 2005
Creator:
Best, Richard A., Jr.
Object Type:
Report
System:
The UNT Digital Library
Homeland Security: Defending U.S. Airspace
The September 11th attacks drew attention to U.S. air defense, and the 9/11 Commission Report recommended that Congress regularly assess the ability of Northern Command to defend the United States against military threats. Protecting U.S. airspace may require improvements in detecting aircraft and cruise missiles, making quick operational decisions, and intercepting them. A number of options exist in each of these areas. A variety of issues must be weighed including expediency, cost, and minimizing conflicts with civilian aviation.
Date:
February 11, 2005
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library