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A Linac Simulation Code for Macro-Particles Tracking and Steering Algorithm Implementation
In this paper, a linac simulation code written in Fortran90 is presented and several simulation examples are given. This code is optimized to implement linac alignment and steering algorithms, and evaluate the accelerator errors such as RF phase and acceleration gradient, quadrupole and BPM misalignment. It can track a single particle or a bunch of particles through normal linear accelerator elements such as quadrupole, RF cavity, dipole corrector and drift space. One-to-one steering algorithm and a global alignment (steering) algorithm are implemented in this code.
Date:
May 3, 2012
Creator:
sun, yipeng
Object Type:
Report
System:
The UNT Digital Library
Maltose Biochemistry and Transport in Plant Leaves
Starch is a desirable plant product for both food and biofuel. Leaf starch is ideal for use in biofuels because it does not compete with grain starch, which is used for food. Starch is accumulated in plant leaves during the day and broken down at night. If we can manipulate leaf starch breakdown it may be possible to design a plant that provides both grain starch for food and leaf starch for biofuel. The pathway of leaf starch breakdown was not known when this work started. Preliminary evidence had shown that maltose was the primary product of leaf starch breakdown (Weise, Weber & Sharkey, 2004) and that it was metabolized by a disproportionating enzyme called amylomaltase but given the initials DPE2 (Lu & Sharkey, 2004). In this work we showed that only one form of maltose was metabolically active (Weise et al., 2005a) and that maltose was located in two different places when the amylomaltase was knocked out but only inside the chloroplast when the maltose transporter was knocked out (Lu et al., 2006a). This allowed us to estimate the energetics of maltose export and to show that maltose export is more efficient than glucose export (Weise et al., 2005b). …
Date:
May 3, 2012
Creator:
Sharkey, Thomas D
Object Type:
Report
System:
The UNT Digital Library
Measuring the absolute DT neutron yield using the Magnetic Recoil Spectrometer at OMEGA and the NIF
A Magnetic Recoil Spectrometer (MRS) has been installed and extensively used on OMEGA and the National Ignition Facility (NIF) for measurements of the absolute neutron spectrum from inertial confinement fusion (ICF) implosions. From the neutron spectrum measured with the MRS, many critical implosion parameters are determined including the primary DT neutron yield, the ion temperature, and the down-scattered neutron yield. As the MRS detection efficiency is determined from first principles, the absolute DT neutron yield is obtained without cross-calibration to other techniques. The MRS primary DT neutron measurements at OMEGA and the NIF are shown to be in excellent agreement with previously established yield diagnostics on OMEGA, and with the newly commissioned nuclear activation diagnostics on the NIF.
Date:
May 3, 2012
Creator:
Mackinnon, A.; Casey, D.; Frenje, J. A.; Johnson, M. G.; Seguin, F. H.; Li, C. K. et al.
Object Type:
Article
System:
The UNT Digital Library
Nanorods of Silicon and Germanium with Well-Defined Shapes and Sizes
We have made number of important discoveries along the major goals of the project, namely i) electrodeposition of germanium thin films from clusters, ii) synthesis of cluster-based surfactants with long hydrocarbon chains and micelles made of them, iii) grafting of Ge{sub 9}-clusters onto self assembled films of siloxanes attached to glass substrates, iv) doping of Ge{sub 9}-clusters, and v) expanding the clusters to ten-atom cages of Ge{sub 10}{sup 2-}.
Date:
May 3, 2012
Creator:
Sevov, Slavi C.
Object Type:
Report
System:
The UNT Digital Library
Reconciliation Directives: Components and Enforcement
None
Date:
May 3, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Renewable Energy and Environmental Sustainability Using Biomass From Dairy and Beef Animal Production: Final Report, Volume 1
The Texas Panhandle is regarded as the 'Cattle Feeding Capital of the World', producing 42% of the fed beef cattle in the United States within a 200-mile radius of Amarillo generating more than 5 million tons of feedlot manure/year. Apart from feedlots, the Bosque River Region in Erath County, just north of Waco, Texas with about 110,000 dairy cattle in over 250 dairies, produces 1.8 million tons of manure biomass (excreted plus bedding) per year. While the feedlot manure has been used extensively for irrigated and dry land crop production, most dairies, as well as other concentrated animal feeding operations (CAFO's), the dairy farms utilize large lagoon areas to store wet animal biomass. Water runoff from these lagoons has been held responsible for the increased concentration of phosphorus and other contaminates in the Bosque River which drains into Lake Waco - the primary source of potable water for Waco's 108,500 people. The concentrated animal feeding operations may lead to land, water, and air pollution if waste handling systems and storage and treatment structures are not properly managed. Manure-based biomass (MBB) has the potential to be a source of green energy at large coal-fired power plants and on smaller-scale combustion systems …
Date:
May 3, 2012
Creator:
Annamalai, Kalyan; Sweeten, John M.; Auvermann, Brent W.; Muhtar, Saqib; Caperada, Sergio; Engler, Cady R. et al.
Object Type:
Report
System:
The UNT Digital Library
Renewable Energy and Environmental Sustainability Using Biomass From Dairy and Beef Animal Production: Final Report, Volume III
ABSTRACT The Texas Panhandle is regarded as the âCattle Feeding Capital of the Worldâ, producing 42% of the fed beef cattle in the United States within a 200-mile radius of Amarillo generating more than 5 million tons of feedlot manure /year. Apart from feedlots, the Bosque River Region in Erath County, just north of Waco, Texas with about 110,000 dairy cattle in over 250 dairies, produces 1.8 million tons of manure biomass (excreted plus bedding) per year. While the feedlot manure has been used extensively for irrigated and dry land crop production, most dairies, as well as other concentrated animal feeding operations (CAFOâs), the dairy farms utilize large lagoon areas to store wet animal biomass. Water runoff from these lagoons has been held responsible for the increased concentration of phosphorus and other contaminates in the Bosque River which drains into Lake Wacoâthe primary source of potable water for Wacoâs 108,500 people. The concentrated animal feeding operations may lead to land, water, and air pollution if waste handling systems and storage and treatment structures are not properly managed. Manure-based biomass (MBB) has the potential to be a source of green energy at large coal-fired power plants and on smaller-scale combustion systems …
Date:
May 3, 2012
Creator:
Sweeten, John M.; Annamalai, Kalyan; Auvermann, Brent; Mukhtar, Saqib; Capareda, Sergio C.; Engler, Cady et al.
Object Type:
Report
System:
The UNT Digital Library
Renewable Energy and Environmental Sustainability Using Biomass From Dairy and Beef Animal Production: Volume 2. Cattle Biomass Feedstocks: Properties, Preparation, Logistics and Economics
The Texas Panhandle is regarded as the 'Cattle Feeding Capital of the World', producing 42% of the fed beef cattle in the United States within a 200-mile radius of Amarillo generating more than 5 million tons of feedlot manure/year. Apart from feedlots, the Bosque River Region in Erath County, just north of Waco, Texas with about 110,000 dairy cattle in over 250 dairies, produces 1.8 million tons of manure biomass (excreted plus bedding) per year. While the feedlot manure has been used extensively for irrigated and dry land crop production, most dairies, as well as other concentrated animal feeding operations (CAFO's), the dairy farms utilize large lagoon areas to store wet animal biomass. Water runoff from these lagoons has been held responsible for the increased concentration of phosphorus and other contaminates in the Bosque River which drains into Lake Waco - the primary source of potable water for Waco's 108,500 people. The concentrated animal feeding operations may lead to land, water, and air pollution if waste handling systems and storage and treatment structures are not properly managed. Manure-based biomass (MBB) has the potential to be a source of green energy at large coal-fired power plants and on smaller-scale combustion systems …
Date:
May 3, 2012
Creator:
Sweeten, John M.; Annamalai, Kalyan; Auvermann, Brent; Mukhtar, Saqib; Capareda, Sergio, C.; Engler, Cady et al.
Object Type:
Report
System:
The UNT Digital Library
Simultaneous High-Resolution 2-Dimensional Spatial and 1-Dimensional Picosecond Streaked X-ray Pinhole Imaging
A Kentech x-ray streak camera was run at the LLNL Compact Multipulse Terawatt (COMET) laser to record simultaneous space- and time-resolved measurements of picosecond laser-produced plasmas. Four different x-ray energy channels were monitored using broad-band filters to record the time history of Cu targets heated at irradiances of 10{sup 16} - 10{sup 19} W/cm{sup 2}. Through the Cu filter channel, a time-resolution below 3ps was obtained. Additionally, an array of 10 {micro}m diameter pinholes was placed in front of the camera to produce multiple time-resolved x-ray images on the photocathode and time-integrated images on the phosphor with 10 and 15 times magnification, respectively, with spatial resolution of <13 {micro}m.
Date:
May 3, 2012
Creator:
Steel, A. B.; Nagel, S. R.; Dunn, J. & Baldis, H. A.
Object Type:
Article
System:
The UNT Digital Library
Tennessee Valley and Eastern Kentucky Wind Working Group
In December 2009, the Southern Alliance for Clean Energy (SACE), through a partnership with the Appalachian Regional Commission, EKPC, Kentucky's Department for Energy Development and Independence, SACE, Tennessee's Department of Environment and Conservation, and TVA, and through a contract with the Department of Energy, established the Tennessee Valley and Eastern Kentucky Wind Working Group (TVEKWWG). TVEKWWG consists of a strong network of people and organizations. Working together, they provide information to various organizations and stakeholders regarding the responsible development of wind power in the state. Members include representatives from utility interests, state and federal agencies, economic development organizations, non-government organizations, local decision makers, educational institutions, and wind industry representatives. The working group is facilitated by the Southern Alliance for Clean Energy. TVEKWWG supports the Department of Energy by helping educate and inform key stakeholders about wind energy in the state of Tennessee.
Date:
May 3, 2012
Creator:
Stokes, Katie
Object Type:
Report
System:
The UNT Digital Library
U.S. Spent Nuclear Fuel Storage
This report focuses on the current situation with spent nuclear fuel storage in the United States. It does not address all of the issues associated with permanent disposal of SNF, but rather focuses on the SNF storage situation, primarily at current and former reactor facilities for the potentially foreseeable future.
Date:
May 3, 2012
Creator:
Werner, James D.
Object Type:
Report
System:
The UNT Digital Library
A User Perspective of High-Performance Computing on the Cloud
None
Date:
May 3, 2012
Creator:
Marathe, A.; Lowenthal, D.; Rountree, B.; Yuan, X.; Schulz, M. & de Supinski, B.
Object Type:
Article
System:
The UNT Digital Library
Application of the Split Hopkinson Resonant Bar Test for Seismic Property Characterization of Hydrate-bearing Sand Undergoing Water Saturation
Conventional resonant bar tests allow the measurement of seismic properties of rocks and sediments at low frequencies (several kilohertz). However, the tests require a long, slender sample which is often difficult to obtain from the deep subsurface and weak and fractured formations. We present an alternative low-frequency measurement technique to the conventional resonant bar tests. This technique involves a jacketed core sample placed between a pair of long, metal extension rods with attached seismic source and receiver—the same geometry as the split Hopkinson pressure bar test for large-strain, dynamic impact experiments. Because of the added length and mass to the sample, the resonance frequency of the entire system can be lowered significantly, compared to the sample alone. The proposed “Split Hopkinson Resonant Bar (SHRB)” test is applied in two steps. In the first step, extension and torsion-mode resonance frequencies and attenuation of the system are measured. Then, numerical inversions for the compressional and shear wave velocities and attenuation are performed. We initially applied the SHRB test to synthetic materials (plastics) for testing its accuracy, then used it for measuring the seismic velocities and attenuation of a rock core containing supercritical CO{sub 2}, and a sediment core while methane hydrate formed …
Date:
May 3, 2011
Creator:
Nakagawa, S. & Kneafsey, T. J.
Object Type:
Report
System:
The UNT Digital Library
Bell/Williamson Regional Water Supply Facility Plan
This document contains the "Jarrel Schwertner Water Supply Corporation (JSWSC)final report for the Regional Water Supply Facility Planning Grant and their response to the Texas Development Boards (TWDB) draft report comment letter."
Date:
May 3, 2011
Creator:
Texas Water Development Board
Object Type:
Report
System:
The Portal to Texas History
CAD-centric Computation Management System for a Virtual TBM
HyPerComp Inc. in research collaboration with TEXCEL has set out to build a Virtual Test Blanket Module (VTBM) computational system to address the need in contemporary fusion research for simulating the integrated behavior of the blanket, divertor and plasma facing components in a fusion environment. Physical phenomena to be considered in a VTBM will include fluid flow, heat transfer, mass transfer, neutronics, structural mechanics and electromagnetics. We seek to integrate well established (third-party) simulation software in various disciplines mentioned above. The integrated modeling process will enable user groups to interoperate using a common modeling platform at various stages of the analysis. Since CAD is at the core of the simulation (as opposed to computational meshes which are different for each problem,) VTBM will have a well developed CAD interface, governing CAD model editing, cleanup, parameter extraction, model deformation (based on simulation,) CAD-based data interpolation. In Phase-I, we built the CAD-hub of the proposed VTBM and demonstrated its use in modeling a liquid breeder blanket module with coupled MHD and structural mechanics using HIMAG and ANSYS. A complete graphical user interface of the VTBM was created, which will form the foundation of any future development. Conservative data interpolation via CAD (as …
Date:
May 3, 2011
Creator:
Munipalli, Ramakanth; Szema, K. Y.; Huang, P. Y.; Rowell, C. M.; Ying, A. & Abdou, M.
Object Type:
Report
System:
The UNT Digital Library
Clean Energy Standard: Potential Qualifying Energy Sources
This report begins with a brief examination of clean energy, renewable energy, and alternative energy. It then presents possible selection criteria Congress could use to determine which sources could be eligible for a CES depending on the goal(s) of the CES. The report provides an overview of the energy sources most commonly discussed as potential CES qualifying sources: biomass, fossil fuels (natural gas combined-cycle and coal-fired power plants with carbon capture and sequestration), geothermal resources, nuclear, solar, water, and wind. The report describes where each source can be found in the United States, the estimated quantity available for electricity generation, technologies used to create electricity from the source, advantages and disadvantages of using the source for electricity generation, and policy implications should the source be included in a CES.5 The report also contains a section on energy efficiency and its potential inclusion in a CES.
Date:
May 3, 2011
Creator:
Bracmort, Kelsi; Folger, Peter; Holt, Mark; Ratner, Michael & Sissine, Fred
Object Type:
Report
System:
The UNT Digital Library
The Compact Salaginella Genome Identifies Changes in Gene Content Associated with the Evolution of Vascular Plants
None
Date:
May 3, 2011
Creator:
Lucas, S.; Grigoriev, I.; Banks, J.; Nishiyama, T.; Bowman, J.; Gribskov, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Computing the energy of a water molecule using MultiDeterminants: A simple, efficient algorithm
None
Date:
May 3, 2011
Creator:
Clark, B K; Morales, M A; McMinis, J; Kim, J & Scuseria, G
Object Type:
Article
System:
The UNT Digital Library
The Construction Sector in the U.S. Economy
The construction sector is a major component of the U.S. economy. During the past decade, construction was a prime beneficiary of low interest rates and the housing-led economic boom, but was also one of the largest casualties of the subsequent financial crisis. Construction spending comprised about 7%-8% of U.S. annual economic output from 1995 to mid-2000, reaching nearly 9% of gross domestic product at the peak of the housing run-up in 2006, before declining to about 5% in 2010. Likewise, construction employment ranged from a low of about 4.6 million during the early 1990s to a high of 7.7 million during the 2006 housing boom, and was about 5.5 million in early 2011.
Date:
May 3, 2011
Creator:
Kirchhoff, Suzanne M.
Object Type:
Report
System:
The UNT Digital Library
Côte d'Ivoire Post-Gbagbo: Crisis Recovery
Côte d'Ivoire is emerging from a severe political-military crisis that followed a disputed November 28, 2010, presidential runoff election between former president Laurent Gbagbo and his, former Prime Minister Alassane Ouattara. Both claimed electoral victory and formed opposing governments. Their rivalry spurred a full-scale civil military conflict in early March 2011, after months of growing political violence. Armed conflict largely ended days after Gbagbo's arrest by pro-Ouattara forces, aided by United Nations (U.N.) and French peacekeepers, but limited residual fighting was continuing to occur as of April 20.
Date:
May 3, 2011
Creator:
Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
Côte d’Ivoire Post-Gbagbo: Crisis Recovery
This report discusses about Côte d’Ivoire which is emerging from a severe political-military crisis that followed a disputed November 28, 2010, Presidential runoff election between former president Laurent Gbagbo and his, former Prime Minister Alassane Ouattara.
Date:
May 3, 2011
Creator:
Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
Defense Authorization and Appropriations Bills: FY1970-FY2011
This report is a research aid, which lists the Department Of Defense authorization bills and appropriations bills for FY1970-FY2011. It includes all the pertinent information on the passage of these bills through the legislative process: bill numbers, report numbers, dates reported and passed, recorded vote numbers and vote tallies, dates of passage of the conference reports with their numbers and votes, vetoes, substitutions, dates of final passage, and public law numbers. Key definitions are also included.
Date:
May 3, 2011
Creator:
DeBruyne, Nese F.
Object Type:
Report
System:
The UNT Digital Library
Disentangling the Mn moments on different sublattices in the half-metallic ferrimagnet Mn3?xCoxGa
Ferrimagnetic Mn{sub 3-x}Co{sub x}Ga compounds have been investigated by magnetic circular dichroism in x-ray absorption (XMCD). Compounds with x > 0.5 crystallize in the CuHg{sub 2}Ti structure. A tetragonal distortion of the cubic structure occurs for x {le} 0.5. For the cubic phase, magnetometry reveals a linearly increasing magnetization of 2x Bohr magnetons per formula unit obeying the generalized Slater-Pauling rule. XMCD confirms the ferrimagnetic character with Mn atoms occupying two different sublattices with antiparallel spin orientation and different degrees of spin localization and identifies the region 0.6 < x {le} 0.8 as most promising for a high spin polarization at the Fermi level. Individual Mn moments on inequivalent sites are compared to theoretical predictions.
Date:
May 3, 2011
Creator:
Klaer, P.; Jenkins, C. A.; Alijani, V.; Winterlik, J.; Balke, B.; Felser, C. et al.
Object Type:
Article
System:
The UNT Digital Library
Electronic structure and f-orbital occupancy in Yb-substituted CeCoIn5
The local structure and 4f orbital occupancy have been investigated in Ce{sub 1−x}Yb{sub x}CoIn{sub 5} via Yb L{sub III}-edge extended x-ray absorption fine structure (EXAFS), Ce and Yb L{sub III}-edge x-ray absorption near-edge structure (XANES), and angle-resolved photoemission spectroscopy (ARPES) measurements. Yb(III) (4f{sup 13}) is the hole analog of Ce(III) (4f{sup 1}). Yb is found to be strongly intermediate-valent in Ce{sub 1−x}Yb{sub x}CoIn{sub 5} throughout the entire doping range, including pure YbCoIn{sub 5}, with an f-hole occupancy for Yb of n{sub f} ≃ 0.3 (i.e. Yb{sup 2.3+}), independent of Yb concentration and independent of temperature down to T = 20 K. In contrast, the f-electron orbital occupancy for Ce remains close to 1 for all Yb concentrations, suggesting that there is no mutual influence on n{sub f} between neighboring Ce and Yb sites. Likewise, ARPES measurements at 12 K have found that the electronic structure along {Gamma} − X is not sensitive to the Yb substitution, suggesting that the Kondo hybridization of Ce f electrons with the conduction band is not affected by the presence of Yb impurities in the lattice. The emerging picture is that in Ce{sub 1−x}Yb{sub x}CoIn{sub 5} there are two networks, interlaced but independent, that couple …
Date:
May 3, 2011
Creator:
Booth, C. H.; Durakiewicz, T.; Capan, C.; Hurt, D.; Bianchi, A. D.; Joyce, J.J. et al.
Object Type:
Article
System:
The UNT Digital Library