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AL 00-3
This abstract painting is mostly black with some white vertical scrapes.
Date:
2000
Creator:
Falsetta, Vincent
Object Type:
Artwork
System:
The UNT Digital Library
The 0.38 Percent Across-the-Board Cut in FY2000 Appropriations
This report outlines cuts made in the federal budget for FY2000. The 0.38% cut was expected to yield savings of $2.4 billion in budget authority and $1.4 billion in outlays for the fiscal year. Departments with cuts in excess of $100 million included the Departments of Defense, Transportation, Health and Human Services, and Education.
Date:
February 25, 2000
Creator:
Keith, Robert
Object Type:
Report
System:
The UNT Digital Library
1-D Equilibrium Discrete Diffusion Monte Carlo
We present a new hybrid Monte Carlo method for 1-D equilibrium diffusion problems in which the radiation field coexists with matter in local thermodynamic equilibrium. This method, the Equilibrium Discrete Diffusion Monte Carlo (EqDDMC) method, combines Monte Carlo particles with spatially discrete diffusion solutions. We verify the EqDDMC method with computational results from three slab problems. The EqDDMC method represents an incremental step toward applying this hybrid methodology to non-equilibrium diffusion, where it could be simultaneously coupled to Monte Carlo transport.
Date:
August 2000
Creator:
Evans, T. M.; Urbatsch, T. J. & Lichtenstein, H.
Object Type:
Article
System:
The UNT Digital Library
A 2-D Pore-Network Model of the Drying of Single-Component Liquids in Porous Media
The drying of liquid-saturated porous media is typically approaching using macroscopic continuum models involving phenomenological coefficients. Insight on these coefficients can be obtained by a more fundamental study at the pore- and pore-network levels. In this report, a model based on pore-network representation of porous media that accounts for various process at the pore-scale is presented. These include mass transfer by advection and diffusion in the gas phase, viscous flow in liquid and gas phases and capillary effects at the gas-liquid menisci in the pore throats.
Date:
January 20, 2000
Creator:
Yortsos, Yanic C.; Yiotis, A. G.; Stubos, A. K. & Boundovis, A. G.
Object Type:
Report
System:
The UNT Digital Library
A 3.3 MJ, Rb + 1 driver design based on an integrated systems analysis
A computer model for systems analysis of heavy ion drivers has been developed and used to evaluate driver designs for inertial fusion energy (IFE). The present work examines a driver for a close-coupled target design that requires less total beam energy but also smaller beam spots sizes than previous target designs. Design parameters and a cost estimate for a 160 beam, 3.3 MJ driver using rubidium ions (A = 85) are reported, and the sensitivity of the results to variations in selected design parameters is given.
Date:
March 7, 2000
Creator:
Meier, W. R.; Barnard, J. J. & Bangerter, R. O.
Object Type:
Article
System:
The UNT Digital Library
A 3.3 MJ, Rb{sup +1} Driver Design Based on an Integrated Systems Analysis
A computer model for systems analysis of heavy ion drivers has been developed and used to evaluate driver designs for inertial fusion energy (IFE). The present work examines a driver for a close-coupled target design that requires less total beam energy but also smaller beam spots sizes than previous target designs. Design parameters and a cost estimate for a 160 beam, 3.3 MJ driver using rubidium ions (A = 85) are reported, and the sensitivity of the results to variations in selected design parameters is given.
Date:
September 15, 2000
Creator:
Meier, W. R.; Barnard, J. J. & Bangerter, R. O.
Object Type:
Article
System:
The UNT Digital Library
3-D DETERMINISTIC TRANSPORT METHODS RESEARCH AT LANL UNDER ASCI
None
Date:
January 1, 2000
Creator:
Morel, J.
Object Type:
Article
System:
The UNT Digital Library
3-D Finite Element Analysis of Induction Logging in a Dipping Formation
Electromagnetic induction by a magnetic dipole located above a dipping interface is of relevance to the petroleum well-logging industry. The problem is fully three-dimensional (3-D) when formulated as above, but reduces to an analytically tractable one-dimensional (1-D) problem when cast as a small tilted coil above a horizontal interface. The two problems are related by a simple coordinate rotation. An examination of the induced eddy currents and the electric charge accumulation at the interface help to explain the inductive and polarization effects commonly observed in induction logs from dipping geological formations. The equivalence between the 1-D and 3-D formulations of the problem enables the validation of a previously published finite element solver for 3-D controlled-source electromagnetic induction.
Date:
July 20, 2000
Creator:
Everett, Mark E.; Badea, Eugene A,; Shen, Liang, C.; Merchant, Gulamabbas A. & Weiss, Chester J.
Object Type:
Article
System:
The UNT Digital Library
3-D Numerical Modeling of a Complex Salt Structure
Reliably processing, imaging, and interpreting seismic data from areas with complicated structures, such as sub-salt, requires a thorough understanding of elastic as well as acoustic wave propagation. Elastic numerical modeling is an essential tool to develop that understanding. While 2-D elastic modeling is in common use, 3-D elastic modeling has been too computationally intensive to be used routinely. Recent advances in computing hardware, including commodity-based hardware, have substantially reduced computing costs. These advances are making 3-D elastic numerical modeling more feasible. A series of example 3-D elastic calculations were performed using a complicated structure, the SEG/EAGE salt structure. The synthetic traces show that the effects of shear wave propagation can be important for imaging and interpretation of images, and also for AVO and other applications that rely on trace amplitudes. Additional calculations are needed to better identify and understand the complex wave propagation effects produced in complicated structures, such as the SEG/EAGE salt structure.
Date:
February 17, 2000
Creator:
House, L.; Larsen, S. & Bednar, J. B.
Object Type:
Article
System:
The UNT Digital Library
A 3-D SAR approach to IFSAR processing
Interferometric SAR (IFSAR) can be shown to be a special case of 3-D SAR image formation. In fact, traditional IFSAR processing results in the equivalent of merely a super-resolved, under-sampled, 3-D SAR image. However, when approached as a 3-D SAR problem, a number of IFSAR properties and anomalies are easily explained. For example, IFSAR decorrelation with height is merely ordinary migration in 3-D SAR. Consequently, treating IFSAR as a 3-D SAR problem allows insight and development of proper motion compensation techniques and image formation operations to facilitate optimal height estimation. Furthermore, multiple antenna phase centers and baselines are easily incorporated into this formulation, providing essentially a sparse array in the elevation dimension. This paper shows the Polar Format image formation algorithm extended to 3 dimensions, and then proceeds to apply it to the IFSAR collection geometry. This suggests a more optimal reordering of the traditional IFSAR processing steps.
Date:
March 1, 2000
Creator:
Doerry, Armin W. & Bickel, Doug L.
Object Type:
Article
System:
The UNT Digital Library
3-D SIMULATION FOR ASSESSMENT OF TRANSPARENT WEAPON DISASSEMBLY OPERATIONS
None
Date:
September 1, 2000
Creator:
JACKSON, J. W.
Object Type:
Article
System:
The UNT Digital Library
3-D Spectral IP Imaging: Non-Invasive Characterization DE FG02 96ER 14714
The Earth Resources Laboratory (ERL) performed a broad foundational study of spectral induced polarization (SIP) for site characterization. The project encompassed laboratory studies of microgeometry and chemistry effects on Induced Polarization (IP), an investigation of electromagnetic coupling (emc) noise, and development of 3D modeling and inversion codes. The major finding of the project is that emc noise presents a critical limitation for field implementation of SIP and conventional correction methods are inadequate. The project developed a frequency domain 3D complex resistivity modeling and inversion code Laboratory experiments were conducted to study the effects of solution chemistry and microgeometry on the SIP response of sandstone. Results indicate that changes in chemistry affect the magnitude of the spectral IP response and changes in microgeometry affect the shape of the spectral IP response. The developed physiochemical IP model can be used to invert spectral IP data for an apparent grain size distribution. Laboratory studies over the last twenty years have shown that SIP data must be acquired over several decades of frequency and include frequencies greater than 1kHz. A model of the components of emc noise has been developed and investigation with this model showed that inductive coupling is the most significant component. …
Date:
June 1, 2000
Creator:
Morgan, F. Dale; Rodi, William & Lesmes, David
Object Type:
Report
System:
The UNT Digital Library
3-D UNSTRUCTURED HEXAHEDRAL-MESH Sn TRANSPORT METHODS
This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). We have developed a method for solving the neutral-particle transport equation on 3-D unstructured hexahedral meshes using a S{sub n} discretization in angle in conjunction with a discontinuous finite-element discretization in space and a multigroup discretization in energy. Previous methods for solving this equation in 3-D have been limited to rectangular meshes. The unstructured-mesh method that we have developed is far more efficient for solving problems with complex 3-D geometric features than rectangular-mesh methods. In spite of having to make several compromises in our spatial discretization technique and our iterative solution technique, our method has been found to be both accurate and efficient for a broad class of problems.
Date:
November 1, 2000
Creator:
Morel, J. & McGhee, J.
Object Type:
Report
System:
The UNT Digital Library
3 V manganese oxide electrode materials for lithium batteries.
None
Date:
June 20, 2000
Creator:
Johnson, C. S. & Thackeray, M. M.
Object Type:
Article
System:
The UNT Digital Library
5.2 mW Single-Mode Power from a Coupled-Resonator Vertical-Cavity Laser
None
Date:
November 28, 2000
Creator:
Fischer, A. J.; Choquette, K. D.; Chow, W. W.; Allerman, A. A. & Geib, K. M.
Object Type:
Article
System:
The UNT Digital Library
8:1 thermal cavity problem
We present results for the 8:1 thermal cavity problem using FIDAP on 3 meshes--each using 3 elements. A brief summary of related results is also included. This contribution comes via the rather versatile and general commercial finite element code, FIDAP. This code still offers the user a wide selection with respect to element choices, statement of governing equations, (e.g., advective form, divergence form) implicit time integrators (variable-step or fixed step, first-order or second-order), and solution techniques for both the nonlinear and linear sets of equations. We have tested quite a number of these variations on this problem; here we report on an interesting subset and will present the remainder at the conference.
Date:
October 11, 2000
Creator:
Gresho, P M & Sutton, S
Object Type:
Article
System:
The UNT Digital Library
21,000th SCVI baby Registered for Immunization
Document about the birth of the 21,000th baby registered with the SCVI Childhood Immunization Program. The document discusses the role the SCVI Immunization Program played in informing mothers on the importance of vaccinating their children. A black-and-white photograph on the document shows the infant Michael Jones-Diggs with his mother Cheresa Jones-Diggs, his grandmother Sharon Wray, SCVI Program Assistant Dorothy Buckley, and SCS Volunteer Services Manager Deborah Evans-Young.
Date:
2000
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
24 Command Fire Improvement Action Program Plan
Fluor Hanford (FH) is responsible for providing support to the Department of Energy Richland Operations Office (RL) in the implementation of the Hanford Emergency Preparedness (EP) program. During fiscal year 2000, a number of program improvements were identified from various sources including a major range fire (24 Command Fire). Evaluations of the emergency preparedness program have confirmed that it currently meets all requirements and that performance of personnel involved is good, however the desire to effect continuous improvement resulted in the development of this improvement program plan. This program plan defines the activities that will be performed in order to achieve the desired performance improvements.
Date:
December 1, 2000
Creator:
Griffin, G. B.
Object Type:
Report
System:
The UNT Digital Library
50 years of excellence in science and engineering at the Savannah River Site
This is a collection of papers including abstracts about the celebration of 50 years of excellence in science and engineering at the Savannah River Site. The Symposium Committee invited current and former employees to nominate the innovations to be recognized. Several selection panels of experts in various technical fields reviewed 190 nominations and selected the achievements included in this proceedings. Neither the Symposium Committee nor the selection panels claim that these accomplishments are the best of the best. Instead, they believe that they typify the outstanding quality of science and engineering at the Site during its first half-century.
Date:
April 19, 2000
Creator:
Phillips, A G
Object Type:
Article
System:
The UNT Digital Library
84-Kilometer Radiological Monitoring Grid
The purpose of this report is to document the development of a radial grid that is suitable for evaluating the pathways and potential impacts of a release of radioactive materials to the environment within a distance of 84 kilometers.
Date:
July 31, 2000
Creator:
Roe, L.
Object Type:
Report
System:
The UNT Digital Library
100-D Area In Situ Redox Treatability Test for Chromate-Contaminated Groundwater
A treatability test was conducted for the In Situ Redox Manipulation (ISRM) technology at the 100 D Area of the U. S. Department of Energy's Hanford Site. The target contaminant was dissolved chromate in groundwater. The ISRM technology creates a permeable subsurface treatment zone to reduce mobile chromate in groundwater to an insoluble form. The ISRM permeable treatment zone is created by reducing ferric iron to ferrous iron within the aquifer sediments, which is accomplished by injecting aqueous sodium dithionite into the aquifer and then withdrawing the reaction products. The goal of the treatability test was to create a linear ISRM barrier by injecting sodium dithionite into five wells. Well installation and site characterization activities began in spring 1997; the first dithionite injection took place in September 1997. The results of this first injection were monitored through the spring of 1998. The remaining four dithionite injections were carried out in May through July of 1998.These five injections created a reduced zone in the Hanford unconfined aquifer approximately 150 feet in length (perpendicular to groundwater flow) and 50 feet wide. The reduced zone extended over the thickness of the unconfined zone. Analysis of post-emplacement groundwater samples showed concentrations of chromate, in …
Date:
October 12, 2000
Creator:
Williams, Mark D.; Vermeul, Vincent R.; Szecsody, James E. & Fruchter, Jonathan S.
Object Type:
Report
System:
The UNT Digital Library
100-D Area In Situ Redox Treatability Test for Chromate-Contaminated Groundwater
None
Date:
October 12, 2000
Creator:
Williams, M. D.; Vermeul, V. R.; Szecsody, J. E. & Fruchter, J. S.
Object Type:
Report
System:
The UNT Digital Library
100% foundry compatible packaging and full wafer release and die separation technique for surface micromachined devices
A completely foundry compatible chip-scale package for surface micromachines has been successfully demonstrated. A pyrex (Corning 7740) glass cover is placed over the released surface micromachined die and anodically bonded to a planarized polysilicon bonding ring. Electrical feedthroughs for the surface micromachine pass underneath the polysilicon sealing ring. The package has been found to be hermetic with a leak rate of less than 5 x 10{sup {minus}8} atm cm{sup {minus}3}/s. This technology has applications in the areas of hermetic encapsulation and wafer level release and die separation.
Date:
April 6, 2000
Creator:
Oliver, Andrew D. & Matzke, Carolyn M.
Object Type:
Article
System:
The UNT Digital Library
AZ-101 Gamma Cart Operational Test Report
Test Report documenting the successful completion of the Operational Test Procedure for the AZ-101 Gamma Carts. Gamma carts are in support of the AZ-101 Mixer Pump Test.
Date:
March 30, 2000
Creator:
Mendoza, R. E.
Object Type:
Report
System:
The UNT Digital Library