Partner
UNT Libraries Government Documents Department
849
UNT Libraries
239
Private Collection of Jim Bell
173
Oklahoma Historical Society
104
National Museum of the Pacific War/Admiral Nimitz Foundation
39
Sweetwater/Nolan County City-County Library
27
Sterling Municipal Library
22
San Antonio Public Library
14
UNT Libraries Special Collections
14
Carl Albert Congressional Research and Studies Center
9
48 More
Collection
Office of Scientific & Technical Information Technical Reports
568
Texas Digital Newspaper Program
260
Jim Bell Texas Architecture Photograph Collection
173
Congressional Research Service Reports
162
UNT Theses and Dissertations
142
Oklahoma Digital Newspaper Program
118
Tocker Foundation Grant
78
The Greensheet
74
Texas State Publications
43
National Museum of the Pacific War Oral History Collection
39
89 More
Degree Department
Department of Psychology
20
College of Music
16
Department of Counseling and Higher Education
12
Department of Biological Sciences
11
Department of Chemistry
10
Department of Behavior Analysis
6
College of Information
5
Department of Computer Science and Engineering
5
Department of History
5
Chemistry
4
41 More
Degree Discipline
Degree Level
Country
States
Year
Month
Large-N reduction in QCD-like theories with massive adjoint fermions
Large-N QCD with heavy adjoint fermions emulates pure Yang-Mills theory at long distances. We study this theory on a four- and three-torus, and analytically argue the existence of a large-small volume equivalence. For any finite mass, center symmetry unbroken phase exists at sufficiently small volume and this phase can be used to study the large-volume limit through the Eguchi-Kawai equivalence. A finite temperature version of volume independence implies that thermodynamics on R3 x S1 can be studied via a unitary matrix quantum mechanics on S1, by varying the temperature. To confirm this non-perturbatively, we numerically study both zero- and one-dimensional theories by using Monte-Carlo simulation. Order of finite-N corrections turns out to be 1/N. We introduce various twisted versions of the reduced QCD which systematically suppress finite-N corrections. Using a twisted model, we observe the confinement/deconfinement transition on a 1{sup 3} x 2-lattice. The result agrees with large volume simulations of Yang-Mills theory. We also comment that the twisted model can serve as a non-perturbative formulation of the non-commutative Yang-Mills theory.
Date:
August 26, 2010
Creator:
Azeyanagi, Tatsuo; U., /Kyoto; Hanada, Masanori; Inst., /Weizmann; Unsal, Mithat; /Weizmann Inst. /SLAC /Stanford U., Phys. Dept. et al.
Object Type:
Article
System:
The UNT Digital Library
Building America Best Practices Series: Volume 7.1: Guide to Determining Climate Regions by County
This report for DOE's Building America program helps builders identify which Building America climate region they are building in. The guide includes maps comparing the Building America regions with climate designations used in the International Energy Conservation Code for Residential Buildings and lists all U.S. counties by climate zone. A very brief history of the development of the Building America climate map and descriptions of each climate zone are provided. This report is available on the Building America website www.buildingamerica.gov.
Date:
August 30, 2010
Creator:
Baechler, Michael C.; Williamson, Jennifer L.; Gilbride, Theresa L.; Cole, Pamala C.; Hefty, Marye G. & Love, Pat M.
Object Type:
Report
System:
The UNT Digital Library
Characterization of the DT Ice Layer in a Fusion Capsule Using a Two-Dimensional X-Ray Shearing Interferometer
None
Date:
August 9, 2010
Creator:
Baker, K L
Object Type:
Article
System:
The UNT Digital Library
Soldier Boys of Texas: The Seventh Texas Infantry in World War I
This study first offers a political, social, and economic overview of Texas during the first two decades of the twentieth century, including reaction in the Lone Star state to the declaration of war against Germany in April, 1917; the fear of saboteurs and foreign-born citizens; and the debate on raising a wartime army through a draft or by volunteerism. Then, focusing in-depth on northwest Texas, the study examines the Texas National Guard unit recruited there, the Seventh Texas Infantry Regiment. Using primarily the selective service registration cards of a sample of 1,096 members of the regiment, this study presents a portrait of the officers and enlisted soldiers of the Seventh Texas based on age, occupation, marital status, dependents and other criteria, something that has not been done in studies of World War I soldiers. Next, the regiment's training at Camp Bowie, near Fort Worth, Texas, is described, including the combining of the Seventh Texas with the First Oklahoma Infantry to form the 142nd Infantry Regiment of the Thirty-Sixth Division. After traveling to France and undergoing nearly two months of training, the regiment was assigned to the French Fourth Army in the Champagne region and went into combat for the first …
Date:
August 2010
Creator:
Ball, Gregory W.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Pep-X Impedance and Instability Calculations
PEP-X, a next generation, ring-based light source is designed to run with beams of high current and low emittance. Important parameters are: energy 4.5 GeV, circumference 2.2 km, beam current 1.5 A, and horizontal and vertical emittances, 185 pm by 8 pm. In such a machine it is important that impedance driven instabilities not degrade the beam quality. In this report they study the strength of the impedance and its effects in PEP-X. For the present, lacking a detailed knowledge of the vacuum chamber shape, they create a straw man design comprising important vacuum chamber objects to be found in the ring, for which they then compute the wake functions. From the wake functions they generate an impedance budget and a pseudo-Green function wake representing the entire ring, which they, in turn, use for performing microwave instability calculations. In this report they, in addition, consider in PEP-X the transverse mode-coupling, multi-bunch transverse, and beam-ion instabilities.
Date:
August 25, 2010
Creator:
Bane, K. L. F.; Lee, L. -Q.; Ng, C.; Stupakov, G.; au Wang, L. & Xiao, L.
Object Type:
Article
System:
The UNT Digital Library
COMPARISON OF SIMULATION CODES FOR MICROWAVE INSTABILITY IN BUNCHED BEAMS
In accelerator design, there is often a need to evaluate the threshold to the (longitudinal) microwave instability for a bunched beam in an electron storage ring. Several computational tools are available that allow them, once given the wakefield representing a ring, to numerically find the threshold current and to simulate the development of the instability. In this work, they present results of coputer simulations using two codes recently developed at the SLAC National Accelerator Laboratory: a Vlasov-Fokker-Planck (VFP) solver based on an algorithm by Warnock and Ellison, and a program that find the threshold from the linearized Vlasov equation. They apply the programs to find the instability threshold for three models of ring impedances: that of a Q = 1 resonator, of shielded coherent synchrotron radiation (CSR), and of a resistive wall. The first example is wel-bheaved, but the other two are singular wakes that need special care. Note that similar numerical studies of the threshold of a Q = 1 resonantor wake have been performed by Oide and Yokova, and others. They compare the results of the two programs and discuss their respective capabilities and limitations. In this report they assume the slippage factor {eta} is always positive. They …
Date:
August 25, 2010
Creator:
Bane, K.L.F.; Cai, Y. & Stupakov, G.
Object Type:
Article
System:
The UNT Digital Library
IMPEDANCE CONSIDERATIONS FOR THE DESIGN OF THE VACUUM SYSTEM OF THE CERN PS2
In order for the LHC to reach an ultimate luminosity goal of 10{sup 35}/cm{sup 2}/s, CERN is considering upgrade options for the LHC injector chain, including a new 50 GeV synchrotron of about 1.3 km length for protons and heavy ions, to be called the PS2 [1]. The proton energy will be ramped from 4 GeV to 50 GeV in 1.2 s, and the design proton current for LHC operation is 2.7 A. In the LARP framework, we are studying the instability thresholds and the impedance requirements of the vacuum system for the PS2. Goal of this study is to develop an impedance budget for the machine. We consider the standard single and multi-bunch collective effects that may be an issue in the PS2. For single bunch, we study the microwave instability and the transverse mode coupling instability (TMCI); for multi-bunch, the transverse coupled bunch instability. While the impedance budget will include many components in the machine, at present, we only have sufficient information to include the resistance of the beam pipe, the vacuum flanges that connect the various pieces of the vacuum chamber, and space charge impedance in our estimate. Note that earlier estimates of the impedance and its …
Date:
August 26, 2010
Creator:
Bane, K.L.F.; Stupakov, G.; Wienands, U.; Benedikt, M.; Grudiev, A.; Mahner, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Multilingual Subjectivity: Are More Languages Better?
This paper discusses multilingual subjectivity.
Date:
August 2010
Creator:
Banea, Carmen; Mihalcea, Rada, 1974- & Wiebe, Janyce M.
Object Type:
Paper
System:
The UNT Digital Library
Tank 40 Final SB6 Chemical Characterization Results
A sample of Sludge Batch 6 (SB6) was taken from Tank 40 in order to obtain radionuclide inventory analyses necessary for compliance with the Waste Acceptance Product Specifications (WAPS), and a portion of the sample was designated for SB6 processing studies. The SB6 WAPS sample was also analyzed for chemical composition including noble metals and fissile composition, and these results are reported here. These analyses along with the WAPS radionuclide analyses will help define the composition of the sludge in Tank 40 that is currently being fed to DWPF as SB6. At the Savannah River National Laboratory (SRNL) the 3-L Tank 40 SB6 sample was transferred from the shipping container into a 4-L high density polyethylene vessel and solids were allowed to settle overnight. Supernate was then siphoned off and circulated through the shipping container to complete the transfer of the sample. Following thorough mixing of the 3-L sample, a 485 g sub-sample was removed. This sub-sample was then utilized for all subsequent analytical samples.
Date:
August 13, 2010
Creator:
Bannochie, C.
Object Type:
Report
System:
The UNT Digital Library
A Training Program to Facilitate Caregiver Involvement in School Meetings
Caregivers of children with autism will likely meet with many school professionals once their children become school-aged. These meetings can be intimidating for caregivers who are unfamiliar with special education terminology and protocol, and caregivers may feel ineffective when communicating with school personnel. The purpose of this study is to describe a training curriculum to teach caregivers ways in which to communicate during meetings with school professionals, including the kinds of questions to ask/statements to make and when to ask or make them. A detailed overview of the training procedures, the participants, and the outcomes are described here. Preliminary data suggest the training produced increases in communication skills and that caregivers found the training effective and useful.
Date:
August 2010
Creator:
Barahona, Heather
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Preliminary characterization of active MEMS valves.
Partial characterization of a series of electrostatically actuated active microfluidic valves is to be performed. Tests are performed on a series of 24 valves from two different MEMS sets. Focus is on the physical deformation of the structures under variable pressure loadings, as well as voltage levels. Other issues that inhibit proper performance of the valves are observed, addressed and documented as well. Many microfluidic applications have need for the distribution of gases at finely specified pressures and times. To this end a series of electrostatically actuated active valves have been fabricated. Eight separate silicon die are discussed, each with a series of four active valves present. The devices are designed such that the valve boss is held at a ground, with a voltage applied to lower contacts. Resulting electrostatic forces pull the boss down against a series of stops, intended to create a seal as well as prevent accidental shorting of the device. They have been uniquely packaged atop a stack of material layers, which have inlaid channels for application of fluid flow to the backside of the valve. Electrical contact is supplied from the underlying printed circuit board, attached to external supplies and along traces on the silicon. …
Date:
August 1, 2010
Creator:
Barnard, Casey Anderson
Object Type:
Report
System:
The UNT Digital Library
Thermal-stress modeling of an optical microphone at high temperature.
To help determine the capability range of a MEMS optical microphone design in harsh conditions computer simulations were carried out. Thermal stress modeling was performed up to temperatures of 1000 C. Particular concern was over stress and strain profiles due to the coefficient of thermal expansion mismatch between the polysilicon device and alumina packaging. Preliminary results with simplified models indicate acceptable levels of deformation within the device.
Date:
August 1, 2010
Creator:
Barnard, Casey Anderson
Object Type:
Report
System:
The UNT Digital Library
Hepatotoxicity of Mercury to Fish
Tissue samples from spotted gar (Lepisosteus oculatus) and largemouth bass (Micropterus salmoides) were collected from Caddo Lake. Gar and bass livers were subjected to histological investigation and color analysis. Liver color (as abs at 400 nm) was significantly correlated with total mercury in the liver (r2 = 0.57, p = 0.02) and muscle (r2 = 0.58, p = 0.01) of gar. Evidence of liver damage as lipofuscin and discoloration was found in both species but only correlated with liver mercury concentration in spotted gar. Inorganic mercury was the predominant form in gar livers. In order to determine the role of mercury speciation in fish liver damage, a laboratory feeding study was employed. Zebrafish (Danio rerio) were fed either a control (0.12 ± 0.002 µg Hg.g-1 dry wt), inorganic mercury (5.03 ± 0.309 µg Hg.g-1 dry wt), or methylmercury (4.11 ± 0.146 µg Hg.g-1 dry wt) diet. After 78 days of feeding, total mercury was highest in the carcass of zebrafish fed methylmercury (12.49 ± 0.369 µg Hg.g-1 dry wt), intermediate in those fed inorganic mercury (1.09 ± 0.117 µg Hg.g-1 dry wt), and lowest in fish fed the control diet (0.48 ± 0.038 µg Hg.g-1 dry wt). Total mercury was …
Date:
August 2010
Creator:
Barst, Benjamin Daniel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Brittle superconducting magnets: an equivilent strain model
To exceed fields of 10 T in accelerator magnets, brittle superconductors like A15 Nb{sub 3}Sn and Nb{sub 3}Al or ceramic High Temperature Superconductors have to be used. For such brittle superconductors it is not their maximum tensile yield stress that limits their structural resistance as much as strain values that provoke deformations in their delicate lattice, which in turn affect their superconducting properties. Work on the sensitivity of Nb{sub 3}Sn cables to strain has been conducted in a number of stress states, including uniaxial and multi-axial, producing usually different results. This has made the need of a constituent design criterion imperative for magnet builders. In conventional structural problems an equivalent stress model is typically used to verify mechanical soundness. In the superconducting community a simple scalar equivalent strain to be used in place of an equivalent stress would be an extremely useful tool. As is well known in fundamental mechanics, there is not one single way to reduce a multiaxial strain state as represented by a 2nd order tensor to a scalar. The conceptual experiment proposed here will help determine the best scalar representation to use in the identification of an equivalent strain model.
Date:
August 1, 2010
Creator:
Barzi, E. & Danuso, M.
Object Type:
Report
System:
The UNT Digital Library
Commercialization of High Efficiency Low Cost CIGS Technology Based on Electroplating: Final Technical Progress Report, 28 September 2007 - 30 June 2009
This report describes SoloPower's work as a Photovoltaic Technology Incubator awardee within the U.S. Department of Energy's Solar Energy Technologies Program. The term of this subcontract with the National Renewable Energy Laboratory was two years. The project focused on SoloPower's electrodeposition-based copper indium gallium (di)selenide (CIGS) technology. Under this subcontract, SoloPower improved the quality of its flexible metal substrates, increased the size of its solar cells from 0.5 cm2 to 120 cm2, increased the small-area cell efficiencies from near 11% to near 14%, demonstrated large-area cells, and developed a module manufacturing process.
Date:
August 1, 2010
Creator:
Basol, B.
Object Type:
Report
System:
The UNT Digital Library
2009 Release of the Evaluated Nuclear Data Library (ENDL2009)
None
Date:
August 12, 2010
Creator:
Beck, B.; Brown, D. A.; Descalle, M. A.; Hagmann, C.; Hoffman, R.; Ormand, E. et al.
Object Type:
Report
System:
The UNT Digital Library
Characterization of High Level Waste from a Hybrid LIFE Engine for Enhanced Repository Performance
None
Date:
August 25, 2010
Creator:
Beckett, E. & Fratoni, M.
Object Type:
Report
System:
The UNT Digital Library
Waste Treatment Plant Support Program: Summaries of Reports Produced During Fiscal Years 1999-2010
The Waste Treatment Plant (WTP) being built on the U.S. Department of Energy (DOE) Hanford Site will be the largest chemical processing plant in the United States. Bechtel National Inc. (BNI) is the designer and constructor for the WTP. The Pacific Northwest National Laboratory (PNNL) has provided significant research and testing support to the WTP. This report provides a summary of reports developed initially under PNNL’s “1831” use agreement and later PNNL’s “1830” prime contract with DOE in support of the WTP. In March 2001, PNNL under its “1831” use agreement entered into a contract with BNI to support their research and testing activities. However, PNNL support to the WTP predates BNI involvement. Prior to March 2001, PNNL supported British Nuclear Fuels Ltd. in its role as overall designer and constructor. In February 2007, execution of PNNL’s support to the WTP was moved under its “1830” prime contract with DOE. Documents numbered “PNWD-XXXX” were issued under PNNL’s “1831” use agreement. Documents numbered “PNNL-XXXX” were issued under PNNL’s “1830” prime contract with DOE. The documents are sorted by fiscal year and categorized as follows: Characterization HLW (High Level Waste) Material Characterization Pretreatment Simulant Development Vitrification …
Date:
August 12, 2010
Creator:
Beeman, Gordon H.
Object Type:
Report
System:
The UNT Digital Library
Improved Limits on Spin-Dependent WIMP-Proton Interactions from a Two Liter CF$_3$I Bubble Chamber
Data from the operation of a bubble chamber filled with 3.5 kg of CF{sub 3}I in a shallow underground site are reported. An analysis of ultrasound signals accompanying bubble nucleations confirms that alpha decays generate a significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during an effective exposure of 28.1 kg-day, consistent with a neutron background. This observation provides the strongest direct detection constraint to date on WIMP-proton spin-dependent scattering for WIMP masses > 20 GeV/c{sup 2}.
Date:
August 1, 2010
Creator:
Behnke, E.; Behnke, J.; Brice, S. J.; Broemmelsiek, D.; Collar, J. I.; Cooper, P. S. et al.
Object Type:
Article
System:
The UNT Digital Library
FY2010 Supplemental for Wars, Disaster Assistance, Haiti Relief, and Other Programs
This report discusses the humanitarian relief funding, the Haiti FY2010 supplemental proposal, and other foreign economic and humanitarian assistance, as well as other domestic program funding.
Date:
August 6, 2010
Creator:
Belasco, Amy; Else, Daniel H.; Lindsay, Bruce R.; Margesson, Rhoda; Nakamura, Kennon H.; Taft-Morales, Maureen et al.
Object Type:
Report
System:
The UNT Digital Library
[Bench in Courthouse]
Photograph of a wooden bench pushed against a wall in the Hill County courthouse in Hillsboro, Texas. There is a door to the right, and wood paneling on the wall.
Date:
August 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Benches in Courtroom]
Photograph of several wooden benches in a courtroom in the Hill County courthouse in Hillsboro, Texas. Framed photos of white men are mounted on the wall.
Date:
August 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Building in Hillsboro]
Photograph of cars parked in the lot of a building in Hillsboro, Texas. A church steeple is visible to the right, and there is a road in the foreground.
Date:
August 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Cardboard Boxes in a Room]
Photograph of cardboard boxes piled against the right wall of a room in the Limestone County courthouse in Groesbeck, Texas. There is a wooden door in the background, and a skylight on the ceiling.
Date:
August 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History