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Identification of Matrix Conditions that Give Rise to the Linear Coupling Resonances (open access)

Identification of Matrix Conditions that Give Rise to the Linear Coupling Resonances

N/A
Date: March 1, 2009
Creator: Gardner, C. J.
System: The UNT Digital Library
Identification of matrix conditions that give rise to the linear coupling resonances (open access)

Identification of matrix conditions that give rise to the linear coupling resonances

General definitions of horizontal and vertical amplitudes for linear coupled motion are developed from the normal form of the one-turn matrix. This leads to the identification of conditions on the matrix that give rise to the linear coupling sum and difference resonances. The correspondence with the standard hamiltonian treatment of the resonances is discussed.
Date: March 1, 2009
Creator: Gardner,C.J.
System: The UNT Digital Library
The New Booster Dump and Dump Bumps (open access)

The New Booster Dump and Dump Bumps

N/A
Date: March 1, 2001
Creator: Gardner, C. J.
System: The UNT Digital Library
A New Approach for the Permanent Disposal of Long Lived Fission Waste (open access)

A New Approach for the Permanent Disposal of Long Lived Fission Waste

Nuclear fission can meet humanity's disparate requirements for carbon-free energy throughout this century and for millennia to come - not only for electricity but also as a source of hydrogen for transportation fuels and a heat source for desalination. However, most countries are not pursuing fission as an option for future energy and global climate needs. One paramount reason is diminished public acceptance over concerns of waste disposal. We would also add 'fuel resources' as a major future concern, because fission is not sustainable in the long term with the present 'once-through' fuel that utilizes less than 1% of the mined uranium and consigns its fertile potential to a permanent waste repository. Accordingly, global scale fission will become attainable (i.e., doable) if and when an integrated solution to this overall 'fuel-cycle' problem is realized. It is the back-end of the fuel cycle - i.e., the need for permanent storage of spent fuel and high-level waste - that has become the focus of much of the criticism. In particular, the construction and implementation of permanent waste repositories such as Yucca Mountain is becoming increasingly problematic from a financial and political perspective. The major shortcoming of these conventional repositories is that they …
Date: March 27, 2007
Creator: Perkins, L J
System: The UNT Digital Library
Biochemistry and genetics of autotrophy in Methanococcus (open access)

Biochemistry and genetics of autotrophy in Methanococcus

The project investigated fundamental aspects of carbon metabolism and genetics in the methane-producing archaeon Methanococcus maripaludis. The project yielded 23 peer-reviewed publications and five reviews from 1997-2007. PDFs of the peer-reviewed publications are included in the next section. Some papers of special interest are listed below. The pathway of pyruvate biosynthesis was elucidated by a combination of biochemical and physiological studies. This work characterized the very oxygen sensitive pyruvate oxidoreductase and showed that the enzyme was irreversible under physiological conditions. Evidence for the flow of electrons from the energy coupling hydrogenase b (Ehb) was presented. These results were published in the following papers. Yang, Y.L., J.N. Gluska, and W.B. Whitman (2002) Intracellular pyruvate flux in the methane-producing archaeon Methanococcus maripaludis. Arch. Microbiol. 178: 493-498. Lin, W.C., Y.L. Yang, and W.B. Whitman (2003) The anabolic pyruvate oxidoreductase from Methanococcus maripaludis. Arch. Microbiol. 179: 444-456. Lin, W., and W.B. Whitman (2004) The importance of porE and porF in the anabolic pyruvate oxidoreductase of Methanococcus maripaludis. Arch. Microbiol. 181: 68-73. Porat, I., W. Kim, E.L. Hendrickson, Q. Xia, Y. Zhang, T. Wang, F. Taub, B.C. Moore, I.J. Anderson, M. Hackett, J.A. Leigh, and W.B. Whitman (2006) Disruption of the Ehb hydrogenase operon limits …
Date: March 31, 2009
Creator: Whitman, William B.
System: The UNT Digital Library
Steam Explosions in Slurry-fed Ceramic Melters (open access)

Steam Explosions in Slurry-fed Ceramic Melters

This report assesses the potential and consequences of a steam explosion in Slurry Feed Ceramic Melters (SFCM). The principles that determine if an interaction is realistically probable within a SFCM are established. Also considered are the mitigating effects due to dissolved, non-condensable gas(es) and suspended solids within the slurry feed, radiation, high glass viscosity, and the existence of a cold cap. The report finds that, even if any explosion were to occur, however, it would not be large enough to compromise vessel integrity.
Date: March 28, 2001
Creator: Carter, J.T.
System: The UNT Digital Library
End-Of-Life Vehicle Recycling: State of the Art of Resource Recovery From Shredder Residue. (open access)

End-Of-Life Vehicle Recycling: State of the Art of Resource Recovery From Shredder Residue.

Each year, more than 50 million vehicles reach the end of their service life throughout the world. More than 95% of these vehicles enter a comprehensive recycling infrastructure that includes auto parts recyclers/dismantlers, remanufacturers, and material recyclers (shredders). Today, about 75% of automotive materials are profitably recycled via (1) parts reuse and parts and components remanufacturing and (2) ultimately by the scrap processing (shredding) industry. The process by which the scrap processors recover metal scrap from automobiles involves shredding the obsolete automobiles, along with other obsolete metal-containing products (such as white goods, industrial scrap, and demolition debris), and recovering the metals from the shredded material. The single largest source of recycled ferrous scrap for the iron and steel industry is obsolete automobiles. The non-metallic fraction that remains after the metals are recovered from the shredded materials (about 25% of the weight of the vehicle)--commonly called shredder residue--is disposed of in landfills. Over the past 10 to 15 years, a significant amount of research and development has been undertaken to enhance the recycle rate of end-of-life vehicles (ELVs), including enhancing dismantling techniques and improving remanufacturing operations. However, most of the effort has focused on developing technology to recover materials, such as …
Date: March 21, 2007
Creator: Jody, B. J.; Daniels, E. J. & Systems, Energy
System: The UNT Digital Library
Global and Regional Ecosystem Modeling: Databases of Model Drivers and Validation Measurements (open access)

Global and Regional Ecosystem Modeling: Databases of Model Drivers and Validation Measurements

Understanding global-scale ecosystem responses to changing environmental conditions is important both as a scientific question and as the basis for making policy decisions. The confidence in regional models depends on how well the field data used to develop the model represent the region of interest, how well the environmental model driving variables (e.g., vegetation type, climate, and soils associated with a site used to parameterize ecosystem models) represent the region of interest, and how well regional model predictions agree with observed data for the region. To assess the accuracy of global model forecasts of terrestrial carbon cycling, two Ecosystem Model-Data Intercomparison (EMDI) workshops were held (December 1999 and April 2001). The workshops included 17 biogeochemical, satellite-driven, detailed process, and dynamic vegetation global model types. The approach was to run regional or global versions of the models for sites with net primary productivity (NPP) measurements (i.e., not fine-tuned for specific site conditions) and analyze the model-data differences. Extensive worldwide NPP data were assembled with model driver data, including vegetation, climate, and soils data, to perform the intercomparison. This report describes the compilation of NPP estimates for 2,523 sites and 5,164 0.5{sup o}-grid cells under the Global Primary Production Data Initiative (GPPDI) …
Date: March 19, 2002
Creator: Olson, R.J.
System: The UNT Digital Library
Results from irradiation tests on D0 Run 2a silicon detectors at the Radiation Damage Facility at Fermilab (open access)

Results from irradiation tests on D0 Run 2a silicon detectors at the Radiation Damage Facility at Fermilab

Several different spare modules of the D0 experiment Silicon Microstrip Tracker (SMT) have been irradiated at the Fermilab Booster Radiation Damage Facility (RDF). The total dose received was 2.1 MRads with a proton flux of {approx} 3 {center_dot} 10{sup 11} p/cm{sup 2} sec. The irradiation was carried out in steps of 0.3 or 0.6 MRad, with several days between the steps to allow for annealing and measurements. The leakage currents and depletion voltages of the devices increased with dose, as expected from bulk radiation damage. The double sided, double metal devices showed worse degradation than the less complex detectors.
Date: March 1, 2006
Creator: Gardner, J.; Cerber, C.; Ke, Z.; Korjanevsky, S.; Leflat, A.; Lehner, F. et al.
System: The UNT Digital Library
Notice of Construction for Tank Waste Remediation System Vadose Zone Characterization (open access)

Notice of Construction for Tank Waste Remediation System Vadose Zone Characterization

The following description and any attachments and references are provided to the Washington State Department of Health (WDOH), Division of Radiation Protection, Air Emissions & Defense Waste Section as a notice of construction (NOC) in accordance with Washington Administrative Code (WAC) 246-247, Radiation Protection--Air Emissions. The WAC 246-247-060, ''Applications, registration, and licensing'', states ''This section describes the information requirements for approval to construct, modify, and operate an emission unit. Any NOC requires the submittal of information listed in Appendix A,'' Appendix A (WAC 246-247-1 10) lists the requirements that must be addressed. The original NOC was submitted in May of 1999 as DOE/TU-99-34. Additionally, the following description, attachments and references are provided to the U.S. Environmental Protection Agency (EPA) as an NOC, in accordance with Title 40 Code of Federal Regulations (CFR), Part 61, ''National Emission Standards for Hazardous Air Pollutants.'' The information required for submittal to the EPA is specified in 40 CFR 61.07. The potential emissions from this activity are estimated to provide less than 0.1 millirem/year total effective dose equivalent (TEDE) to the hypothetical offsite maximally exposed individual (MEI), and commencement is needed within a short time frame. Therefore, this application is also intended to provide notification …
Date: March 8, 2000
Creator: HILL, J.S.
System: The UNT Digital Library
Seismic Determination of Reservoir Heterogeneity: Application to the Characterization of Heavy Oil Reservoirs (open access)

Seismic Determination of Reservoir Heterogeneity: Application to the Characterization of Heavy Oil Reservoirs

The objective of the project was to examine how seismic and geologic data could be used to improve characterization of small-scale heterogeneity and their parameterization in reservoir models. Performed a theoretical and numerical study to examine which subsurface features the surface seismic method actually resolves.
Date: March 12, 2003
Creator: Imhof, Matthias G. & Castle, James W.
System: The UNT Digital Library
Seismic Determination of Reservoir Heterogeneity: Application to the Characterization of Heavy Oil Reservoirs (open access)

Seismic Determination of Reservoir Heterogeneity: Application to the Characterization of Heavy Oil Reservoirs

The objective of the project was to examine how seismic and geologic data could be used to improve characterization of small-scale heterogeneity and their parameterization in reservoir models. The study was performed at West Coalinga Field in California.
Date: March 12, 2003
Creator: Imhof, Matthias G. & Castle, James W.
System: The UNT Digital Library
RCRA Assessment Plan for Single-Shell Tank Waste Management Area S-SX at the Hanford Site, Interim Change Notice 1 (open access)

RCRA Assessment Plan for Single-Shell Tank Waste Management Area S-SX at the Hanford Site, Interim Change Notice 1

This interim change notice updates groundwater quality assessment plan at WMA S-SX and documents completion of three new wells planned for in the original document.
Date: March 2000
Creator: Johnson, V. G. & Chou, Charissa J.
System: The UNT Digital Library
Risk Reduction with a Fuzzy Expert Exploration Tool (open access)

Risk Reduction with a Fuzzy Expert Exploration Tool

A state-of-the-art exploration ''expert'' tool, relying on a computerized database and computer maps generated by neural networks, was developed through the use of ''fuzzy'' logic, a relatively new mathematical treatment of imprecise or non-explicit parameters and values. Oil prospecting risk can be reduced with the use of a properly developed and validated ''Fuzzy Expert Exploration (FEE) Tool.'' This FEE Tool can be beneficial in many regions of the U.S. by enabling risk reduction in oil and gas prospecting as well as decreased prospecting and development costs.
Date: March 6, 2003
Creator: Weiss, William W.; Broadhead, Ron & Mundorf, William R.
System: The UNT Digital Library
The Majorana Zero-Neutrino Double-Beta Decay Experiment White Paper (open access)

The Majorana Zero-Neutrino Double-Beta Decay Experiment White Paper

The goal of the Majorana Experiment is to determine the effective Majorana masss of the eletron neutrino. Detection of the neutrino mass implied by oscillation results in within our grasp. This exciting physics goal is best pursued using double-beta decay of germanium because of the historical and emerging advances in eliminating competing signals from radioactive backgrounds. The Majorana Experiment will consist of a large mass of 76Ge in the form of high-resolution detectors deep underground, searching for a sharp peak at the BB endpoint. We present here an overview of the entire project in order to help put in perspective the scope, the level and technial risk, and the readiness of the Collaboration to begin the undertaking.
Date: March 7, 2002
Creator: Gaitskell, R.; Barabash, A.; Konovalov, S.; Stekhanov, V.; Umatov,, V.; Brudanin, V. et al.
System: The UNT Digital Library
Diffractive Higgs Production from Intrinsic Heavy Flavors in the Proton (open access)

Diffractive Higgs Production from Intrinsic Heavy Flavors in the Proton

We propose a novel mechanism for exclusive diffractive Higgs production pp {yields} pHp in which the Higgs boson carries a significant fraction of the projectile proton momentum. This mechanism will provide a clear experimental signal for Higgs production due to the small background in this kinematic region. The key assumption underlying our analysis is the presence of intrinsic heavy flavor components of the proton bound state, whose existence at high light-cone momentum fraction x has growing experimental and theoretical support. We also discuss the implications of this picture for exclusive diffractive quarkonium and other channels.
Date: March 31, 2006
Creator: Brodsky, Stanley J.; Kopeliovich, Boris; Schmidt, Ivan & Soffer, Jacques
System: The UNT Digital Library
Developments in Pursuit of a Micro-Optic Gyroscope (open access)

Developments in Pursuit of a Micro-Optic Gyroscope

Rotation sensors (gyros) and accelerometers are essential components for all precision-guided weapons and autonomous mobile surveillance platforms. MEMS gyro development has been based primarily on the properties of moving mass to sense rotation and has failed to keep pace with the concurrent development of MEMS accelerometers because the reduction of size and therefore mass is substantially more detrimental to the performance of gyros than to accelerometers. A small ({approx}0.2 cu in), robust ({approx}20,000g), inexpensive ({approx}$500), tactical grade performance ({approx}10-20 deg/hr.) gyro is vital for the successful implementation of the next generation of ''smart'' weapons and surveillance apparatus. The range of applications (relevant to Sandia's mission) that are substantially enhanced in capability or enabled by the availability of a gyro possessing the above attributes includes nuclear weapon guidance, fuzing, and safing; synthetic aperture radar (SAR) motion compensation; autonomous air and ground vehicles; gun-launched munitions; satellite control; and personnel tracking. For example, a gyro of this capability would open for consideration more fuzing options for earth-penetration weapons. The MEMS gyros currently available are lacking in one or more of the aforementioned attributes. An integrated optical gyro, however, possesses the potential of achieving all desired attributes. Optical gyros use the properties of light …
Date: March 1, 2003
Creator: VAWTER, GREGORY A.; ZUBRZYCKI, WALTER J.; PEAKE, GREGORY M.; ALFORD, CHARLES; HARGETT, TERRY; SALTERS, BETTY et al.
System: The UNT Digital Library
Energy and water sector policy strategies for drought mitigation. (open access)

Energy and water sector policy strategies for drought mitigation.

Tensions between the energy and water sectors occur when demand for electric power is high and water supply levels are low. There are several regions of the country, such as the western and southwestern states, where the confluence of energy and water is always strained due to population growth. However, for much of the country, this tension occurs at particular times of year (e.g., summer) or when a region is suffering from drought conditions. This report discusses prior work on the interdependencies between energy and water. It identifies the types of power plants that are most likely to be susceptible to water shortages, the regions of the country where this is most likely to occur, and policy options that can be applied in both the energy and water sectors to address the issue. The policy options are designed to be applied in the near term, applicable to all areas of the country, and to ease the tension between the energy and water sectors by addressing peak power demand or decreased water supply.
Date: March 1, 2009
Creator: Kelic, Andjelka; Vugrin, Eric D.; Loose, Verne W. & Vargas, Vanessa N.
System: The UNT Digital Library
Hanford Site Groundwater Monitoring for Fiscal Year 2000 (open access)

Hanford Site Groundwater Monitoring for Fiscal Year 2000

This report presents the results of groundwater and vadose zone monitoring and remediation for fiscal year 2000 on the U.S. Department of Energy's Hanford Site, Washington. The most extensive contaminant plumes are tritium, iodine-129, and nitrate, which all had multiple sources and are very mobile in groundwater. Carbon tetrachloride and associated organic constituents form a relatively large plume beneath the central part of the Site. Hexavalent chromium is present in smaller plumes beneath the reactor areas along the river and beneath the central part of the site. Strontium-90 exceeds standards beneath each of the reactor areas, and technetium-99 and uranium are present in the 200 Areas. RCRA groundwater monitoring continued during fiscal year 2000. Vadose zone monitoring, characterization, remediation, and several technical demonstrations were conducted in fiscal year 2000. Soil gas monitoring at the 618-11 burial ground provided a preliminary indication of the location of tritium in the vadose zone and in groundwater. Groundwater modeling efforts focused on 1) identifying and characterizing major uncertainties in the current conceptual model and 2) performing a transient inverse calibration of the existing site-wide model. Specific model applications were conducted in support of the Hanford Site carbon tetrachloride Innovative Treatment Remediation Technology; to support …
Date: March 1, 2001
Creator: Hartman, Mary J.; Morasch, Launa F. & Webber, William D.
System: The UNT Digital Library
Hanford Site Groundwater Monitoring for Fiscal Year 2004 (open access)

Hanford Site Groundwater Monitoring for Fiscal Year 2004

This document presents the results of groundwater and vadose zone monitoring for fiscal year 2004 (October 2003 through September 2004)on the U.S. Department of Energy's Hanford Site in southeast Washington State.
Date: March 1, 2005
Creator: Hartman, Mary J.; Morasch, Launa F. & Webber, William D.
System: The UNT Digital Library
Hanford Site Groundwater Monitoring for Fiscal Year 2006 (open access)

Hanford Site Groundwater Monitoring for Fiscal Year 2006

This report presents the results of groundwater monitoring for FY 2006 on DOE's Hanford Site. Results of groundwater remediation, vadose zone monitoring, and characterization are summarized. DOE monitors groundwater at the Hanford Site to fulfill a variety of state and federal regulations, including the Atomic Energy Act (AEA), the Resource Conservation and Recovery Act (RCRA), the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), and Washington Administrative Code (WAC).
Date: March 1, 2007
Creator: Hartman, Mary J.; Morasch, Launa F. & Webber, William D.
System: The UNT Digital Library
Final Data Report: P- and S-Wave Velocity Logging Borings C4993, C4996, and C4997 Part B: Overall Logs (open access)

Final Data Report: P- and S-Wave Velocity Logging Borings C4993, C4996, and C4997 Part B: Overall Logs

Insitu borehole P- and S-wave velocity measurements were collected in three borings located within the Waste Treatment Plant (WTP) boundaries at the Hanford Site, southeastern Washington. Geophysical data acquisition was performed between August and October of 2006 by Rob Steller, Charles Carter, Antony Martin and John Diehl of GEOVision. Data analysis was performed by Rob Steller and John Diehl, and reviewed by Antony Martin of GEOVision, and report preparation was performed by John Diehl and reviewed by Rob Steller. The work was performed under subcontract with Battelle, Pacific Northwest Division with Marty Gardner as Battelle’s Technical Representative and Alan Rohay serving as the Technical Administrator for Pacific Northwest National Laboratory (PNNL). This report describes the field measurements, data analysis, and results of this work.
Date: March 20, 2007
Creator: Diehl, John & Steller, Robert
System: The UNT Digital Library
Combined Estimation of Hydrogeologic Conceptual Model and Parameter Uncertainty (open access)

Combined Estimation of Hydrogeologic Conceptual Model and Parameter Uncertainty

The objective of the research described in this report is the development and application of a methodology for comprehensively assessing the hydrogeologic uncertainties involved in dose assessment, including uncertainties associated with conceptual models, parameters, and scenarios. This report describes and applies a statistical method to quantitatively estimate the combined uncertainty in model predictions arising from conceptual model and parameter uncertainties. The method relies on model averaging to combine the predictions of a set of alternative models. Implementation is driven by the available data. When there is minimal site-specific data the method can be carried out with prior parameter estimates based on generic data and subjective prior model probabilities. For sites with observations of system behavior (and optionally data characterizing model parameters), the method uses model calibration to update the prior parameter estimates and model probabilities based on the correspondence between model predictions and site observations. The set of model alternatives can contain both simplified and complex models, with the requirement that all models be based on the same set of data. The method was applied to the geostatistical modeling of air permeability at a fractured rock site. Seven alternative variogram models of log air permeability were considered to represent data …
Date: March 1, 2004
Creator: Meyer, Philip D.; Ye, Ming; Neuman, Shlomo P. & Cantrell, Kirk J.
System: The UNT Digital Library
Modeling to Support Groundwater Contaminant Boundaries for the Shoal Underground Nuclear Test (open access)

Modeling to Support Groundwater Contaminant Boundaries for the Shoal Underground Nuclear Test

The purpose of this work is to characterize groundwater flow and contaminant transport at the Shoal underground nuclear test through numerical modeling using site-specific hydrologic data. The ultimate objective is the development of a contaminant boundary, a model-predicted perimeter defining the extent of radionuclide-contaminated groundwater from the underground test throughout 1,000 years at a prescribed level of confidence. This boundary will be developed using the numerical models described here, after they are approved for that purpose by DOE and NDEP.
Date: March 1, 2004
Creator: Pohlmann, K.; Pohll, G.; Chapman, J.; Hassan, A.; Carroll, R. & Shirley, C.
System: The UNT Digital Library