Partner
Private Collection of Jim Bell
381
UNT Libraries Government Documents Department
234
Oklahoma Historical Society
36
UNT Libraries
31
UNT Libraries Special Collections
13
UNT College of Information
13
UNT Music Library
12
Sweetwater/Nolan County City-County Library
9
Sterling Municipal Library
8
National Museum of the Pacific War/Admiral Nimitz Foundation
4
39 More
Collection
Jim Bell Texas Architecture Photograph Collection
381
Texas Digital Newspaper Program
95
Office of Scientific & Technical Information Technical Reports
88
Congressional Research Service Reports
69
United States Census Map Collection
54
Oklahoma Digital Newspaper Program
41
Tocker Foundation Grant
29
The Greensheet
24
Burushaski Language Resource
13
Computational Resource on South Asian Languages
13
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Iran: Regional Perspectives and U.S. Policy
This report provides a description of Iran's neighbors' policies and interests, options for Congressional consideration, and an analysis of potential regional implications.
Date:
January 13, 2010
Creator:
Addis, Casey L.; Blanchard, Christopher M.; Katzman, Kenneth; Migdalovitz, Carol; Nichol, Jim; Sharp, Jeremy M. et al.
Object Type:
Report
System:
The UNT Digital Library
LITERATURE REVIEW ON MAXIMUM LOADING OF RADIONUCLIDES ON CRYSTALLINE SILICOTITANATE
Plans are underway to use small column ion exchange (SCIX) units installed in high-level waste tanks to remove Cs-137 from highly alkaline salt solutions at Savannah River Site. The ion exchange material slated for the SCIX project is engineered or granular crystalline silicotitanate (CST). Information on the maximum loading of radionuclides on CST is needed by Savannah River Remediation for safety evaluations. A literature review has been conducted that culminated in the estimation of the maximum loading of all but one of the radionuclides of interest (Cs-137, Sr-90, Ba-137m, Pu-238, Pu-239, Pu-240, Pu-241, Am-241, and Cm-244). No data was found for Cm-244.
Date:
October 13, 2010
Creator:
Adu-Wusu, K. & Pennebaker, F.
Object Type:
Report
System:
The UNT Digital Library
Laser-Wakefield driven compact Compton scattering gamma-ray source
None
Date:
April 13, 2010
Creator:
Albert, F.; Froula, D. H.; Hartemann, F. V. & Joshi, C.
Object Type:
Report
System:
The UNT Digital Library
Doctoral Recital: 2010-04-13 - Reuben Allred, piano
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 13, 2010
Creator:
Allred, Reuben
Object Type:
Sound
System:
The UNT Digital Library
QMDS: A File System Metadata Management Service Supporting a Graph Data Model-Based Query Language
Proposes QMDS: a file system metadata management service that integrates all file system metadata and uses a graph model with attributes on nodes and edges.
Date:
September 13, 2010
Creator:
Ames, S; Gokhale, M B & Maltzahn, C
Object Type:
Article
System:
The UNT Digital Library
Discharge Physics of High Power Impulse Magnetron Sputtering
High power impulse magnetron sputtering (HIPIMS) is pulsed sputtering where the peak power exceeds the time-averaged power by typically two orders of magnitude. The peak power density, averaged over the target area, can reach or exceed 107 W/m2, leading to plasma conditions that make ionization of the sputtered atoms very likely. A brief review of HIPIMS operation is given in a tutorial manner, illustrated by some original data related to the self-sputtering of niobium in argon and krypton. Emphasis is put on the current-voltage-time relationships near the threshold of self-sputtering runaway. The great variety of current pulse shapes delivers clues on the very strong gas rarefaction, self-sputtering runaway conditions, and the stopping of runaway due to the evolution of atom ionization and ion return probabilities as the gas plasma is replaced by metal plasma. The discussions are completed by considering instabilities and the special case of ?gasless? self-sputtering.
Date:
October 13, 2010
Creator:
Anders, Andre
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Daniel Andrews, April 13, 2010
The National Museum of the Pacific War presents an oral interview with Daniel Andrews. Andrews joined the United States Navy in 1941 where he became a SeaBee. Andrews was sent to Saipan to help build airfields and seaplane bases. He left Saipan in July of 1945.
Date:
April 13, 2010
Creator:
Andrews, Daniel
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Daniel Andrews, April 13, 2010
The National Museum of the Pacific War presents an oral interview with Daniel Andrews. Andrews joined the United States Navy in 1941 where he became a SeaBee. Andrews was sent to Saipan to help build airfields and seaplane bases. He left Saipan in July of 1945.
Date:
April 13, 2010
Creator:
Andrews, Daniel
Object Type:
Text
System:
The Portal to Texas History
Spin Crossover in Ferropericlase at High Pressure: A Seismically Hidden Transition?
None
Date:
September 13, 2010
Creator:
Antonangeli, Daniele; Siebert, Julien; Aracne, Chantel M.; Farber, Daniel L.; Bosak, A.; Hoesch, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Mechanical design and analysis of an eight-pole superconducting vector magnet for soft x-ray magnetic dichroism measurements
An eight-pole superconducting magnet is being developed for soft x-ray magnetic dichroism (XMD) experiments at the Advanced Light Source, Lawrence Berkley National Laboratory (LBNL). Eight conical Nb{sub 3}Sn coils with Holmium poles are arranged in octahedral symmetry to form four dipole pairs that provide magnetic fields of up to 5 T in any direction relative to the incoming x-ray beam. The dimensions of the magnet yoke as well as pole taper, diameter, and length were optimized for maximum peak field in the magnet center using the software package TOSCA. The structural analysis of the magnet is performed using ANSYS with the coil properties derived using a numerical homogenization scheme. It is found that the use of orthotropic material properties for the coil has an important influence in the design of the magnet.
Date:
January 13, 2010
Creator:
Arbelaez, D.; Black, A.; Prestemon, S.O.; Wang, S.; Chen, J. & Arenholz, E.
Object Type:
Article
System:
The UNT Digital Library
U.S.-EU Cooperation Against Terrorism
This report examines the evolution of counterterrorism cooperation between the United States and the European Union (EU), particularly since the September 11, 2001 terrorist attacks. It includes a discussion of U.S.-EU cooperation progress and ongoing challenges, as well as perspectives and issues for Congress.
Date:
May 13, 2010
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
Direct Comparison of Brookhaven Reflectivity Measurements with Free-Electron Theory
The reflectivity at normal incidence of copper and aluminum samples was recently measured over a large frequency range at Brookhaven by one of us (JT). Then using the Kramers-Kroning integrals, and assuming the free-electron model of conductivity, the dependence of conductivity on frequency was obtained. The results seemed to suggest, for example, that the dc conductivities of the copper and evaporated aluminum samples are a factor of 3 lower than expected. We propose in this report, instead, directly fitting the free-electron model to the low frequency end of the reflectivity data. This fitting does not depend on the higher frequency results and on Kramers-Kronig integrations, but it does assume that the data at the low frequency end is sufficiently accurate. Note that for our LCLS wakefield studies, it is only over these (relatively) low frequencies that we need to know the electrical properties of the metals. The equations that relate reflectivity R with the free electron parameters dc conductivity {sigma} and relaxation time {tau} are: (1) {tilde {sigma}} = {sigma}/1-ikc{tau}; (2) {tilde n} = {radical} {tilde {epsilon}} = {radical}(1+4{pi}i{tilde k}c/{omega}); and (3) R = |{tilde n}-1/{tilde n} + 1|{sup 2}. The parameters are ac conductivity {tilde {sigma}}, index of refraction …
Date:
December 13, 2010
Creator:
Bane, Karl L.F.
Object Type:
Report
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
Tracking the Sun III; The Installed Cost of Photovoltaics in the United States from 1998-2009
Installations of solar photovoltaic (PV) systems have been growing at a rapid pace in recent years. In 2009, approximately 7,500 megawatts (MW) of PV were installed globally, up from approximately 6,000 MW in 2008, consisting primarily of grid-connected applications. With 335 MW of grid-connected PV capacity added in 2009, the United States was the world's fourth largest PV market in 2009, behind Germany, Italy, and Japan. The market for PV in the United States is driven by national, state, and local government incentives, including up-front cash rebates, production-based incentives, requirements that electricity suppliers purchase a certain amount of solar energy, and federal and state tax benefits. These programs are, in part, motivated by the popular appeal of solar energy, and by the positive attributes of PV - modest environmental impacts, avoidance of fuel price risks, coincidence with peak electrical demand, and the possible deployment of PV at the point of use. Given the relatively high cost of PV, however, a key goal of these policies is to encourage cost reductions over time. Therefore, as policy incentives have become more significant and as PV deployment has accelerated, so too has the desire to track the installed cost of PV systems over …
Date:
December 13, 2010
Creator:
Barbose, Galen; Darghouth, Naim & Wiser, Ryan
Object Type:
Report
System:
The UNT Digital Library
Field Test of a DHW Distribution System: Temperature and Flow Analyses
This presentation discusses a field test of a DHW distribution system in an occupied townhome. It includes measured fixture flows and temperatures, a tested recirculation system, evaluated disaggregation of flow by measured temperatures, Aquacraft Trace Wizard analysis, and comparison.
Date:
May 13, 2010
Creator:
Barley, C. D.; Hendron, B. & Magnusson, L.
Object Type:
Presentation
System:
The UNT Digital Library
Quark mass variation constraints from Big Bang nucleosynthesis
We study the impact on the primordial abundances of light elements created of a variation of the quark masses at the time of Big Bang nucleosynthesis (BBN). In order to navigate through the particle and nuclear physics required to connect quark masses to binding energies and reaction rates in a model-independent way we use lattice QCD data and an hierarchy of effective field theories. We find that the measured {sup 4}He abundances put a bound of {delta}-1% {approx}< m{sub q}/m{sub 1} {approx}< 0.7%. The effect of quark mass variations on the deuterium abundances can be largely compensated by changes of the baryon-to-photon ratio {eta}. Including the bounds on the variation of {eta} coming from WMAP results and some additional assumptions narrows the range of allowed values of {delta}m{sub q}/m{sub q} somewhat.
Date:
December 13, 2010
Creator:
Bedaque, P.; Luu, T. & Platter, L.
Object Type:
Article
System:
The UNT Digital Library
[Across from Old Jail]
Photograph of the old red brick Atascosa County jail building, seen from across the street, in Jourdanton, Texas. A red truck is parked to the left, and trees are visible around the jail.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Arch Above Window]
Photograph of an arch above a window on the exterior of the Karnes County courthouse in Karnes City, Texas.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Architectural Detail]
Photograph of an architectural detail beneath a window on the exterior of the Atascosa County courthouse in Jourdanton, Texas.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Atascosa County Courthouse]
Photograph of the exterior of the Atascosa County courthouse in Jourdanton, Texas. There are short palm trees on the courthouse lawn, and several cars are parked in the lot.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Atascosa County Courthouse]
Photograph of the exterior of the Atascosa County courthouse in Jourdanton, Texas, showing the top few floors.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Atascosa County Courthouse Cornerstone]
Photograph of a close-up of the cornerstone of the Atascosa County courthouse in Jourdanton, Texas.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Atascosa County Courthouse Cornerstone]
Photograph of one of the cornerstones on the Atascosa County courthouse in Jourdanton, Texas. It lists H. T. Phelps of San Antonio as the architect, and Gordon Jones as the contractor.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History
[Atascosa County Jail Cornerstone]
Photograph of the cornerstone on the red brick Atascosa County jail in Jourdanton, Texas.
Date:
October 13, 2010
Creator:
Bell, Jim
Object Type:
Photograph
System:
The Portal to Texas History