Electron Anomalous Magnetic Moment in Basis Light-Front Quantization Approach (open access)

Electron Anomalous Magnetic Moment in Basis Light-Front Quantization Approach

We apply the Basis Light-Front Quantization (BLFQ) approach to the Hamiltonian field theory of Quantum Electrodynamics (QED) in free space. We solve for the mass eigenstates corresponding to an electron interacting with a single photon in light-front gauge. Based on the resulting non-perturbative ground state light-front amplitude we evaluate the electron anomalous magnetic moment. The numerical results from extrapolating to the infinite basis limit reproduce the perturbative Schwinger result with relative deviation less than 1.2%. We report significant improvements over previous works including the development of analytic methods for evaluating the vertex matrix elements of QED.
Date: February 17, 2012
Creator: Zhao, Xingbo; Honkanen, Heli; Maris, Pieter; Vary, James P. & Brodsky, Stanley J.
Object Type: Article
System: The UNT Digital Library
Exploration and Resource Assessment at Mountain Home Air Force Base, Idaho Using an Integrated Team Approach (open access)

Exploration and Resource Assessment at Mountain Home Air Force Base, Idaho Using an Integrated Team Approach

The U.S. Air Force is facing a number of challenges as it moves into the future, one of the biggest being how to provide safe and secure energy to support base operations. A team of scientists and engineers met at Mountain Home Air Force Base near Boise, Idaho, to discuss the possibility of exploring for geothermal resources under the base. The team identified that there was a reasonable potential for geothermal resources based on data from an existing well. In addition, a regional gravity map helped identify several possible locations for drilling a new well. The team identified several possible sources of funding for this well—the most logical being to use U.S. Department of Energy funds to drill the upper half of the well and U.S. Air Force funds to drill the bottom half of the well. The well was designed as a slimhole well in accordance with State of Idaho Department of Water Resources rules and regulations. Drilling operations commenced at the Mountain Home site in July of 2011 and were completed in January of 2012. Temperatures increased gradually, especially below a depth of 2000 ft. Temperatures increased more rapidly below a depth of 5500 ft. The bottom of …
Date: October 1, 2012
Creator: Armstrong, Joseph C.; Breckenridge, Robert P.; Nielson, Dennis L.; Shervais, John W. & Wood, Thomas R.
Object Type: Article
System: The UNT Digital Library
PRESERVATION OF H2 PRODUCTION ACTIVITY IN NANOPOROUS LATEX COATINGS OF RHODOPSEUDOMONAS PALUSTRIS CGA009 DURING DRY STORAGE AT AMBIENT TEMPERATURES (open access)

PRESERVATION OF H2 PRODUCTION ACTIVITY IN NANOPOROUS LATEX COATINGS OF RHODOPSEUDOMONAS PALUSTRIS CGA009 DURING DRY STORAGE AT AMBIENT TEMPERATURES

To assess the applicability of latex cell coatings as an "off-the-shelf' biocatalyst, the effect of osmoprotectants, temperature, humidity and O{sub 2} on preservation of H{sub 2} production in Rhodopseudomonas palustris coatings was evaluated. Immediately following latex coating coalescence (24 h) and for up to 2 weeks of dry storage, rehydrated coatings containing different osmoprotectants displayed similar rates of H{sub 2} production. Beyond 2 weeks of storage, sorbitol- treated coatings lost all H{sub 2} production activity, whereas considerable H{sub 2} production was still detected in sucrose- and trehalose-stabilized coatings. The relative humidity level at which the coatings were stored had a significant impact on the recovery and subsequent rates of H{sub 2} production. After 4 weeks storage under air at 60% humidity, coatings produced only trace amounts of H{sub 2} (0-0.1% headspace accumulation), whereas those stored at <5% humidity retained 27-53% of their H{sub 2} production activity after 8 weeks of storage. When stored in argon at <5% humidity and room temperature, R. palustris coatings retained full H{sub 2} production activity for 3 months, implicating oxidative damage as a key factor limiting coating storage. Overall, the results demonstrate that biocatalytic latex coatings are an attractive cell immobilization platform for preservation of …
Date: August 27, 2012
Creator: Milliken, C.; Piskorska, M.; Soule, T.; Gosse, J.; Flickinger, M.; Smith, G. et al.
Object Type: Article
System: The UNT Digital Library
Texas Law Review, Volume 90, Number 7, June 2012 (open access)

Texas Law Review, Volume 90, Number 7, June 2012

Journal containing articles, notes, book reviews, and other analyses of law and legal cases.
Date: June 2012
Creator: Texas Law Review Association
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas International Law Journal, Volume 47, Number 2, Spring 2012 (open access)

Texas International Law Journal, Volume 47, Number 2, Spring 2012

Journal containing "academic articles, essays, and student notes in the areas of public and private international law, international legal theory, the law of international organizations, comparative and foreign law, and domestic laws with significant international implications" (p. ii).
Date: Spring 2012
Creator: University of Texas at Austin. School of Law.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Central and Eastern United States (CEUS) Seismic Source Characterization (SSC) for Nuclear Facilities Project (open access)

Central and Eastern United States (CEUS) Seismic Source Characterization (SSC) for Nuclear Facilities Project

This report describes a new seismic source characterization (SSC) model for the Central and Eastern United States (CEUS). It will replace the Seismic Hazard Methodology for the Central and Eastern United States, EPRI Report NP-4726 (July 1986) and the Seismic Hazard Characterization of 69 Nuclear Plant Sites East of the Rocky Mountains, Lawrence Livermore National Laboratory Model, (Bernreuter et al., 1989). The objective of the CEUS SSC Project is to develop a new seismic source model for the CEUS using a Senior Seismic Hazard Analysis Committee (SSHAC) Level 3 assessment process. The goal of the SSHAC process is to represent the center, body, and range of technically defensible interpretations of the available data, models, and methods. Input to a probabilistic seismic hazard analysis (PSHA) consists of both seismic source characterization and ground motion characterization. These two components are used to calculate probabilistic hazard results (or seismic hazard curves) at a particular site. This report provides a new seismic source model. Results and Findings The product of this report is a regional CEUS SSC model. This model includes consideration of an updated database, full assessment and incorporation of uncertainties, and the range of diverse technical interpretations from the larger technical community. …
Date: January 31, 2012
Creator: Coppersmith, Kevin J.; Salomone, Lawrence A.; Fuller, Chris W.; Glaser, Laura L.; Hanson, Kathryn L.; Hartleb, Ross D. et al.
Object Type: Report
System: The UNT Digital Library
Long-Term Colloid Mobilization And Colloid-Facilitated Transport Of Radionuclides In A Semi-Arid Vadose Zone (open access)

Long-Term Colloid Mobilization And Colloid-Facilitated Transport Of Radionuclides In A Semi-Arid Vadose Zone

The main purpose of this project was to improve the fundamental mechanistic understanding and quantification of long-term colloid mobilization and colloid-facilitated transport of radionuclides in the vadose zone, with special emphasis on the semi-arid Hanford site. While we focused some of the experiments on hydrogeological and geochemical conditions of the Hanford site, many of our results apply to colloid and colloid-facilitated transport in general. Specific objectives were (1) to determine the mechanisms of colloid mobilization and colloid-facilitated radionuclide transport in undisturbed Hanford sediments under unsaturated flow, (2) to quantify in situ colloid mobilization and colloid-facilitated radionuclide transport from Hanford sediments under field conditions, and (3) to develop a field-scale conceptual and numerical model for colloid mobilization and transport at the Hanford vadose zone, and use that model to predict long-term colloid and colloid- facilitated radionuclide transport. To achieve these goals and objectives, we have used a combination of experimental, theoretical, and numerical methods at different spatial scales, ranging from microscopic investigations of single particle attachment and detachment to larger-scale field experiments using outdoor lysimeters at the Hanford site. Microscopic and single particle investigations provided fundamental insight into mechanisms of colloid interactions with the air-water interface. We could show that a …
Date: November 5, 2012
Creator: Flury, Markus; Harsh, James B; Zhang, Fred; Gee, Glendon W; Mattson, Earl D & Lichtner, Peter C
Object Type: Text
System: The UNT Digital Library
Computational Mechanics Research and Support for Aerodynamics and Hydraulics at TFRHC, Year 2 Quarter 3 Progress Report (open access)

Computational Mechanics Research and Support for Aerodynamics and Hydraulics at TFRHC, Year 2 Quarter 3 Progress Report

None
Date: October 4, 2012
Creator: Lottes, S.A.; Bojanowski, C.; Shen, J.; Xie, Z.; Zhai, Y. (Energy Systems) & Center), (Turner-Fairbank Highway Research
Object Type: Report
System: The UNT Digital Library
Computational Mechanics Research and Support for Aerodynamics and Hydraulics at THFRC, Year 2 Quarter 2 Progress Report (open access)

Computational Mechanics Research and Support for Aerodynamics and Hydraulics at THFRC, Year 2 Quarter 2 Progress Report

The computational fluid dynamics (CFD) and computational structural mechanics (CSM) focus areas at Argonne's Transportation Research and Analysis Computing Center (TRACC) initiated a project to support and compliment the experimental programs at the Turner-Fairbank Highway Research Center (TFHRC) with high performance computing based analysis capabilities in August 2010. The project was established with a new interagency agreement between the Department of Energy and the Department of Transportation to provide collaborative research, development, and benchmarking of advanced three-dimensional computational mechanics analysis methods to the aerodynamics and hydraulics laboratories at TFHRC for a period of five years, beginning in October 2010. The analysis methods employ well benchmarked and supported commercial computational mechanics software. Computational mechanics encompasses the areas of Computational Fluid Dynamics (CFD), Computational Wind Engineering (CWE), Computational Structural Mechanics (CSM), and Computational Multiphysics Mechanics (CMM) applied in Fluid-Structure Interaction (FSI) problems. The major areas of focus of the project are wind and water effects on bridges - superstructure, deck, cables, and substructure (including soil), primarily during storms and flood events - and the risks that these loads pose to structural failure. For flood events at bridges, another major focus of the work is assessment of the risk to bridges caused by …
Date: June 28, 2012
Creator: Lottes, S.A.; Bojanowski, C.; Shen, J.; Xie, Z.; Zhai, Y. (Energy Systems) & Center), (Turner-Fairbank Highway Research
Object Type: Report
System: The UNT Digital Library
Computational Mechanics Research and Support for Aerodynamics and Hydraulics at TFHRC, Year 2 Quarter 1 Progress Report. (open access)

Computational Mechanics Research and Support for Aerodynamics and Hydraulics at TFHRC, Year 2 Quarter 1 Progress Report.

The computational fluid dynamics (CFD) and computational structural mechanics (CSM) focus areas at Argonne's Transportation Research and Analysis Computing Center (TRACC) initiated a project to support and compliment the experimental programs at the Turner-Fairbank Highway Research Center (TFHRC) with high performance computing based analysis capabilities in August 2010. The project was established with a new interagency agreement between the Department of Energy and the Department of Transportation to provide collaborative research, development, and benchmarking of advanced three-dimensional computational mechanics analysis methods to the aerodynamics and hydraulics laboratories at TFHRC for a period of five years, beginning in October 2010. The analysis methods employ well-benchmarked and supported commercial computational mechanics software. Computational mechanics encompasses the areas of Computational Fluid Dynamics (CFD), Computational Wind Engineering (CWE), Computational Structural Mechanics (CSM), and Computational Multiphysics Mechanics (CMM) applied in Fluid-Structure Interaction (FSI) problems. The major areas of focus of the project are wind and water effects on bridges - superstructure, deck, cables, and substructure (including soil), primarily during storms and flood events - and the risks that these loads pose to structural failure. For flood events at bridges, another major focus of the work is assessment of the risk to bridges caused by scour …
Date: April 9, 2012
Creator: Lottes, S.A.; Bojanowski, C.; Shen, J.; Xie, Z.; Zhai, Y. (Energy Systems) & Center), (Turner-Fairbank Highway Research
Object Type: Report
System: The UNT Digital Library
Averages of B-Hadron, C-Hadron, and Tau-Lepton Properties as of Early 2012 (open access)

Averages of B-Hadron, C-Hadron, and Tau-Lepton Properties as of Early 2012

This report talks about Averages of B-Hadron, C-Hadron, and Tau-Lepton Properties as of Early 2012
Date: December 21, 2012
Creator: Amhis, Y.; /LPHE, Lausanne; Banerjee, Sw.; U., /Victoria; Bernhard, R.; U., /Freiburg et al.
Object Type: Article
System: The UNT Digital Library
Navajo Generating Station and Air Visibility Regulations: Alternatives and Impacts (open access)

Navajo Generating Station and Air Visibility Regulations: Alternatives and Impacts

Pursuant to the Clean Air Act, the U.S. Environmental Protection Agency (EPA) announced in 2009 its intent to issue rules for controlling emissions from Navajo Generating Station that could affect visibility at the Grand Canyon and at several other national parks and wilderness areas. The final rule will conform to what EPA determines is the best available retrofit technology (BART) for the control of haze-causing air pollutants, especially nitrogen oxides. While EPA is ultimately responsible for setting Navajo Generating Station's BART standards in its final rule, it will be the U.S. Department of the Interior's responsibility to manage compliance and the related impacts. This study aims to assist both Interior and EPA by providing an objective assessment of issues relating to the power sector.
Date: January 1, 2012
Creator: Hurlbut, D. J.; Haase, S.; Brinkman, G.; Funk, K.; Gelman, R.; Lantz, E. et al.
Object Type: Report
System: The UNT Digital Library
Texas International Law Journal, Volume 47, Number 3, Summer 2012 (open access)

Texas International Law Journal, Volume 47, Number 3, Summer 2012

Journal containing "academic articles, essays, and student notes in the areas of public and private international law, international legal theory, the law of international organizations, comparative and foreign law, and domestic laws with significant international implications" (p. ii).
Date: Summer 2012
Creator: University of Texas at Austin. School of Law.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
STOMP Subsurface Transport Over Multiple Phases: STOMP-CO2 and STOMP-CO2e Guide: Version 1.0 (open access)

STOMP Subsurface Transport Over Multiple Phases: STOMP-CO2 and STOMP-CO2e Guide: Version 1.0

This STOMP (Subsurface Transport Over Multiple Phases) guide document describes the theory, use, and application of the STOMP-CO2 and STOMP-CO2e operational modes. These operational modes of the STOMP simulator are configured to solve problems involving the sequestration of CO2 in geologic saline reservoirs. STOMP-CO2 is the isothermal version and STOMP-CO2e is the nonisothermal version. These core operational modes solve the governing conservation equations for component flow and transport through geologic media; where, the STOMP-CO2 components are water, CO2 and salt and the STOMP-CO2e operational mode also includes an energy conservation equation. Geochemistry can be included in the problem solution via the ECKEChem (Equilibrium-Conservation-Kinetic-Equation Chemistry) module, and geomechanics via the EPRMech (Elastic-Plastic-Rock Mechanics) module. This addendum is designed to provide the new user with a full guide for the core capabilities of the STOMP-CO2 and -CO2e simulators, and to provide the experienced user with a quick reference on implementing features. Several benchmark problems are provided in this addendum, which serve as starting points for developing inputs for more complex problems and as demonstrations of the simulator’s capabilities.
Date: April 3, 2012
Creator: White, Mark D.; Bacon, Diana H.; McGrail, B. Peter; Watson, David J.; White, Signe K. & Zhang, Z. F.
Object Type: Report
System: The UNT Digital Library
National Register of Historic Places Eligibility Testing of Sites 41LT172 and 41LT354 in Luminant's Kosse Mine, Limestone, Texas (open access)

National Register of Historic Places Eligibility Testing of Sites 41LT172 and 41LT354 in Luminant's Kosse Mine, Limestone, Texas

Report on the findings of an archaeological investigation of two sites at Luminant's Kosse Mine in Limestone County, Texas to determine whether they were eligible to be included on the National Register of Historic Places.
Date: February 2012
Creator: Atkins North America, Inc.
Object Type: Report
System: The Portal to Texas History
Eastern Interconnection Demand Response Potential (open access)

Eastern Interconnection Demand Response Potential

None
Date: November 1, 2012
Creator: Baek, Young Sun; Hadley, Stanton W; Uria Martinez, Rocio; Oladosu, Gbadebo A; Smith, Alexander M; Li, Fangxing et al.
Object Type: Report
System: The UNT Digital Library
Postdoctoral program guidelines. (open access)

Postdoctoral program guidelines.

We, the Postdoc Professional Development Program (PD2P) leadership team, wrote these postdoc guidelines to be a starting point for communication between new postdocs, their staff mentors, and their managers. These guidelines detail expectations and responsibilities of the three parties, as well as list relevant contacts. The purpose of the Postdoc Program is to bring in talented, creative people who enrich Sandia's environment by performing innovative R&D, as well as by stimulating intellectual curiosity and learning. Postdocs are temporary employees who come to Sandia for career development and advancement reasons. In general, the postdoc term is 1 year, renewable up to five times for a total of six years. However, center practices may vary; check with your manager. At term, a postdoc may apply for a staff position at Sandia or choose to move to university, industry or another lab. It is our vision that those who leave become long-term collaborators and advocates whose relationships with Sandia have a positive effect upon our national constituency.
Date: April 1, 2012
Creator: Teich-McGoldrick, Stephanie; Miller, Andrew W.; Sava, Dorina Florentina; Liu, Yanli; Ferreira, Summer Rhodes; Biedermann, Laura Butler et al.
Object Type: Report
System: The UNT Digital Library
American Journal of Criminal Law, Volume 39, Number 3, Summer 2012 (open access)

American Journal of Criminal Law, Volume 39, Number 3, Summer 2012

Triannual journal containing articles, notes, and other analyses of criminal law in the United States.
Date: Summer 2012
Creator: University of Texas at Austin. School of Law.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Radar-cross-section reduction of wind turbines. part 1. (open access)

Radar-cross-section reduction of wind turbines. part 1.

In recent years, increasing deployment of large wind-turbine farms has become an issue of growing concern for the radar community. The large radar cross section (RCS) presented by wind turbines interferes with radar operation, and the Doppler shift caused by blade rotation causes problems identifying and tracking moving targets. Each new wind-turbine farm installation must be carefully evaluated for potential disruption of radar operation for air defense, air traffic control, weather sensing, and other applications. Several approaches currently exist to minimize conflict between wind-turbine farms and radar installations, including procedural adjustments, radar upgrades, and proper choice of low-impact wind-farm sites, but each has problems with limited effectiveness or prohibitive cost. An alternative approach, heretofore not technically feasible, is to reduce the RCS of wind turbines to the extent that they can be installed near existing radar installations. This report summarizes efforts to reduce wind-turbine RCS, with a particular emphasis on the blades. The report begins with a survey of the wind-turbine RCS-reduction literature to establish a baseline for comparison. The following topics are then addressed: electromagnetic model development and validation, novel material development, integration into wind-turbine fabrication processes, integrated-absorber design, and wind-turbine RCS modeling. Related topics of interest, including alternative …
Date: March 5, 2012
Creator: Brock, Billy C.; Loui, Hung; McDonald, Jacob J.; Paquette, Joshua A.; Calkins, David A.; Miller, William K. et al.
Object Type: Report
System: The UNT Digital Library
The Rockstar Phase-Space Temporal HALO Finder and the Velocity Offsets of Cluster Cores (open access)

The Rockstar Phase-Space Temporal HALO Finder and the Velocity Offsets of Cluster Cores

Presents a new algorithm for identifying dark matter halos, substructure, and tidal features.
Date: December 21, 2012
Creator: Behroozi, Peter S.; Wechsler, Risa H. & Wu, Hao-Yi
Object Type: Article
System: The UNT Digital Library
SuperB Progress Report for Physics (open access)

SuperB Progress Report for Physics

SuperB is a high luminosity e{sup +}e{sup -} collider that will be able to indirectly probe new physics at energy scales far beyond the reach of any man made accelerator planned or in existence. Just as detailed understanding of the Standard Model of particle physics was developed from stringent constraints imposed by flavour changing processes between quarks, the detailed structure of any new physics is severely constrained by flavour processes. In order to elucidate this structure it is necessary to perform a number of complementary studies of a set of golden channels. With these measurements in hand, the pattern of deviations from the Standard Model behavior can be used as a test of the structure of new physics. If new physics is found at the LHC, then the many golden measurements from SuperB will help decode the subtle nature of the new physics. However if no new particles are found at the LHC, SuperB will be able to search for new physics at energy scales up to 10-100 TeV. In either scenario, flavour physics measurements that can be made at SuperB play a pivotal role in understanding the nature of physics beyond the Standard Model. Examples for using the interplay …
Date: February 14, 2012
Creator: O'Leary, B.; Matias, J.; Ramon, M.; Pous, E.; De Fazio, F.; Palano, A. et al.
Object Type: Report
System: The UNT Digital Library
The Review of Litigation, Volume 31, Number 1, Winter 2012 (open access)

The Review of Litigation, Volume 31, Number 1, Winter 2012

Quarterly journal containing articles, notes, and other analyses of litigation and related issues in the United States or internationally.
Date: Winter 2012
Creator: University of Texas at Austin. School of Law.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Review of Entertainment & Sports Law, Volume 14, Number 1, Fall 2012 (open access)

Texas Review of Entertainment & Sports Law, Volume 14, Number 1, Fall 2012

Annual journal containing articles, notes, and other analyses of law and legal cases related to sports and entertainment in the United States.
Date: Autumn 2012
Creator: University of Texas at Austin. School of Law.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Rhapsody: I. Structural Properties and Formation History from a Statistical Sample of Re-simulated Cluster-size Halos (open access)

Rhapsody: I. Structural Properties and Formation History from a Statistical Sample of Re-simulated Cluster-size Halos

Presents the first results from the RHAPSODY cluster re-simulation project.
Date: December 7, 2012
Creator: Wu, Hao-Yi; Hahn, Oliver; Wechsler, Risa H.; Mao, Yao-Yuan & Behroozi, Peter S.
Object Type: Article
System: The UNT Digital Library