Partner
UNT Libraries Government Documents Department
27,405
UNT Libraries Special Collections
6,924
Private Collection of Jim Bell
2,101
UNT Libraries
1,811
Oklahoma Historical Society
1,298
UNT Music Library
422
UNT College of Information
388
National Museum of the Pacific War/Admiral Nimitz Foundation
336
Sweetwater/Nolan County City-County Library
306
Sterling Municipal Library
266
120 More
Collection
United States Census Map Collection
13,249
Office of Scientific & Technical Information Technical Reports
5,628
The Black Academy of Arts and Letters Records
5,360
USGS Topographic Map Collection
4,340
Texas Digital Newspaper Program
3,616
Congressional Research Service Reports
2,321
Jim Bell Texas Architecture Photograph Collection
2,101
Oklahoma Digital Newspaper Program
1,472
Tocker Foundation Grant
998
The Greensheet
941
228 More
Serial/Series Title
2010 Census County Block Map
7,811
2010 Census P.L. 94-171 County Block Map
5,438
Digital US Topo Maps: 7.5 Minute Series (Topographic)
4,340
Comedy Night at the Muse
1,625
All the Queen's Men
1,085
The Greensheet
941
Roundtable Writer's Breakfast
903
27th Annual Black Music and the Civil Rights Movement Concert
453
Black Music and the Civil Rights Movement Concert
453
Folder 10: 18th Annual Christmas/Kwanzaa Concert, December 10, 2010
397
585 More
Degree Department
Degree Discipline
Degree Level
Country
States
Year
Month
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
PRELIMINARY REPORT ON EVALUATION OF POTENTIAL ELUANTS FOR NON-ACID ELUTION OF CESIUM FROM RESORCINOL-FORMALDEHYDE RESIN
Small-column ion exchange (SCIX) units installed in high-level waste tanks to remove Cs-137 from highly alkaline salt solutions are among the waste treatment plans in the DOE-complex. Spherical Resorcinol-Formaldehyde (sRF) is the ion exchange resin selected for use in the Hanford Waste Treatment and Immobilization Plant (WTP). It is also the primary ion exchange material under consideration for SCIX at the Hanford site. The elution step of the multi-step ion exchange process is typically done with 0.5 M nitric acid. An acid eluant is a potential hazard in the event of a spill, leak, etc. because the high-level waste tanks are made of carbon steel. Corrosion and associated structural damage may ensue. Studies are ongoing to explore non-acid elution as an alternative. Batch contact sorption equilibrium screening tests have been conducted with 36 potential non-acid eluants. The sorption tests involve equilibrating each cesium-containing eluant solution with the sRF resin for 48 hours at 25 C in a shaker oven. In the sorption tests, an eluant is deemed to have a high cesium elution potential if it minimizes cesium sorption onto the sRF resin. The top candidates (based on lowest cesium sorption distribution coefficients) include ammonium carbonate, ammonium carbonate/ammonium hydroxide, ammonium …
Date:
September 1, 2010
Creator:
Adu-Wusu, K. & Pennebaker, F.
Object Type:
Report
System:
The UNT Digital Library
Southwestern Regional Partnership For Carbon Sequestration (Phase 2) Pump Canyon CO2- ECBM/Sequestration Demonstration, San Juan Basin, New Mexico
Within the Southwest Regional Partnership on Carbon Sequestration (SWP), three demonstrations of geologic CO{sub 2} sequestration are being performed -- one in an oilfield (the SACROC Unit in the Permian basin of west Texas), one in a deep, unmineable coalbed (the Pump Canyon site in the San Juan basin of northern New Mexico), and one in a deep, saline reservoir (underlying the Aneth oilfield in the Paradox basin of southeast Utah). The Pump Canyon CO{sub 2}-enhanced coalbed methane (CO{sub 2}/ECBM) sequestration demonstration project plans to demonstrate the effectiveness of CO{sub 2} sequestration in deep, unmineable coal seams via a small-scale geologic sequestration project. The site is located in San Juan County, northern New Mexico, just within the limits of the high-permeability fairway of prolific coalbed methane production. The study area for the SWP project consists of 31 coalbed methane production wells located in a nine section area. CO{sub 2} was injected continuously for a year and different monitoring, verification and accounting (MVA) techniques were implemented to track the CO{sub 2} movement inside and outside the reservoir. Some of the MVA methods include continuous measurement of injection volumes, pressures and temperatures within the injection well, coalbed methane production rates, pressures and …
Date:
January 31, 2010
Creator:
Advanced Resources International
Object Type:
Report
System:
The UNT Digital Library
The climate of HD 189733b from fourteen transits and eclipses measured by Spitzer
We present observations of six transits and six eclipses of the transiting planet system HD 189733 taken with the Spitzer Space Telescope IRAC camera at 8 microns, as well as a re-analysis of previously published data. We use several novel techniques in our data analysis, the most important of which is a new correction for the detector 'ramp' variation with a double-exponential function which performs better and is a better physical model for this detector variation. Our main scientific findings are: (1) an upper limit on the variability of the day-side planet flux of 2.7% (68% confidence); (2) the most precise set of transit times measured for a transiting planet, with an average accuracy of 3 seconds; (3) a lack of transit-timing variations, excluding the presence of second planets in this system above 20% of the mass of Mars in low-order mean-motion resonance at 95% confidence; (4) a confirmation of the planet's phase variation, finding the night side is 64% as bright as the day side, as well as an upper limit on the night-side variability of 17% (68% confidence); (5) a better correction for stellar variability at 8 micron causing the phase function to peak 3.5 hours before secondary …
Date:
July 1, 2010
Creator:
Agol, E.; /Washington U., Seattle, Astron. Dept. /Santa Barbara, KITP /UC, Santa Barbara; Cowan, Nicolas B.; /Washington U., Seattle, Astron. Dept.; Knutson, Heather A.; /UC, Berkeley, Astron. Dept. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of $\nu_\mu$-Induced Charged-Current Neutral Pion Production Cross Sections on Mineral Oil at $E_\nu\in0.5-2.0$ GeV
MiniBooNE reports the first absolute cross sections for neutral current single {pi}{sup 0} production on CH{sub 2} induced by neutrino and antineutrino interactions measured from the largest sets of NC {pi}{sup 0} events collected to date. The principal result consists of differential cross sections measured as functions of {pi}{sup 0} momentum and {pi}{sup 0} angle averaged over the neutrino flux at MiniBooNE. We find total cross sections of (4.76 {+-} 0.05{sub stat} {+-} 0.76{sub sys}) x 10{sup -40} cm{sup 2}/nucleon at a mean energy of E{sub {nu}} = 808 MeV and (1.48 {+-} 0.05{sub stat} {+-} 0.23{sub sys}) x 10{sup -40} cm{sup 2}/nucleon at a mean energy of E{sub {nu}} = 664 MeV for {nu}{sub {mu}} and {bar {nu}}{sub {mu}} induced production, respectively. In addition, we have included measurements of the neutrino and antineutrino total cross sections for incoherent exclusive NC 1{pi}{sup 0} production corrected for the effects of final state interactions to compare to prior results.
Date:
October 1, 2010
Creator:
Aguilar-Arevalo, A. A.; Anderson, C. E.; Bazarko, A. O.; Brice, S. J.; Brown, B. C.; Bugel, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the Neutrino Neutral-Current Elastic Differential Cross Section on Mineral Oil at E sub nu ~ 1 GeV
We report a measurement of the flux-averaged neutral-current elastic differential cross section for neutrinos scattering on mineral oil (CH{sub 2}) as a function of four-momentum transferred squared, Q{sup 2}. It is obtained by measuring the kinematics of recoiling nucleons with kinetic energy greater than 50 MeV which are readily detected in MiniBooNE. This differential cross-section distribution is fit with fixed nucleon form factors apart from an axial mass, M{sub A}, that provides a best fit for M{sub A} = 1.39 {+-} 0.11 GeV. Using the data from the charged-current neutrino interaction sample, a ratio of neutral-current to charged-current quasi-elastic cross sections as a function of Q{sup 2} has been measured. Additionally, single protons with kinetic energies above 350 MeV can be distinguished from neutrons and multiple nucleon events. Using this marker, the strange quark contribution to the neutral-current axial vector form factor at Q{sup 2} = 0, {Delta}s, is found to be {Delta}s = 0.08{+-} 0.26.
Date:
July 1, 2010
Creator:
Aguilar-Arevalo, A. A.; Anderson, C. E.; Bazarko, A. O.; Brice, S. J.; Brown, B. C.; Bugel, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Europe's Preferential Trade Agreements: Status, Content, and Implications
The first section of this report describes the status and primary motivations of the EU's preferential trade agreements (PTAs) currently in place or under negotiation. The second compares the content and trade coverage of Europe's PTAs to U.S. PTAs. A third section assesses the implications of the EU's PTA program for the multilateral trading system and U.S. trade policy. A concluding section evaluates future directions for Europe's PTA policy.
Date:
March 22, 2010
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Globalization, Worker Insecurity, and Policy Approaches
This report discusses the trends driving global economic integration, sources of worker insecurity and policy approaches. There appears to be a range of views on the merits of each of these policy approaches and the extent to which they can be designed and implemented in a way that would reduce worker insecurity without undermining the benefits of globalization.
Date:
January 20, 2010
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
International Trade and Finance: Key Policy Issues for the 112th Congress
This report highlights major international trade and finance issues Congress may address this year and next.
Date:
December 30, 2010
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Trade Primer: Qs and As on Trade Concepts, Performance, and Policy
This report is divided into four sections in a question-and-answer format: trade concepts, U.S. trade performance, formulation of U.S. trade policy, and trade and investment issues. The first section on "Trade Concepts" deals with why countries trade, the consequences of trade expansion, and the relationship between globalization and trade. The second section, on trade performance, focuses on the U.S. trade deficit and its impact on industries. The third section deals with the roles played by the Executive Branch, Congress, the private sector, and the Judiciary in the formulation of U.S. trade policy. The fourth section, on U.S. trade and investment policy, asks questions related to trade negotiations and agreements and to imports, exports, and investments.
Date:
December 8, 2010
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Transatlantic Regulatory Cooperation: Background and Analysis
This report discusses commercial ties between the United States and the 27-member European Union. While ties between the U.S. and EU are substantial, growing, and mutually beneficial, differences in regulatory approaches limit an even more integrated marketplace from developing. To deal with this situation, a variety of government-to-government efforts have been created to dismantle existing regulatory barriers and to prevent new ones from emerging.
Date:
January 21, 2010
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
The German Economy and U.S.-German Economic Relations
This report discusses Germany's recent trends in economic performance and trade relations with the U.S. This report elaborates on these themes in three parts: historical economic performance; reform challenges facing German political leaders; and selected U.S.-German economic policy differences.
Date:
January 27, 2010
Creator:
Ahearn, Raymond J. & Belkin, Paul
Object Type:
Report
System:
The UNT Digital Library
World Trade Organization (WTO): Issues in the Debate on Continued U.S. Participation
Following World War II, the United States led efforts to establish an open and nondiscriminatory trading system with the expressed goal of raising the economic well-being of all countries and bolstering world peace. These efforts culminated in the creation of the General Agreement on Tariffs and Trade (GATT) in 1948, a provisional agreement on tariffs and trade rules that governed world trade for 47 years. The World Trade Organization (WTO) succeeded the GATT in 1995 and today serves as a permanent body that administers the rules and agreements negotiated and signed by 153 participating parties, as well as a forum for dispute settlement and negotiations. The purpose of this report is to analyze some of the main issues in any debate on U.S. participation in the WTO and to address some of the criticisms leveled at the organization. Academic studies indicate that the United States benefits from broad reductions in trade barriers worldwide, but some workers and industries might not share in those gains. Decisions in the WTO are made by member governments, which determine their negotiating positions, file dispute challenges, and implement their decisions. However, some argue that smaller countries are left out of decision-making and that governments tend …
Date:
June 16, 2010
Creator:
Ahearn, Raymond J. & Fergusson, Ian F.
Object Type:
Report
System:
The UNT Digital Library
Transatlantic Regulatory Cooperation: A Possible Role for Congress
This report focuses on the creation of the Transatlantic Economic Council; the role of legislatures in the regulatory process; and the Transatlantic Legislators' Dialogue and its new role as an advisor to transatlantic regulatory efforts.
Date:
January 4, 2010
Creator:
Ahearn, Raymond J. & Morelli, Vincent
Object Type:
Report
System:
The UNT Digital Library
The Future of the Eurozone and U.S. Interests
This report details the consequences of the European financial crisis of 2010 beginning with the economic fallout of the Greek economy. It then highlights six factors that would be instrumental regarding the "Eurozones" future.
Date:
September 14, 2010
Creator:
Ahearn, Raymond J.; Jackson, James K.; Nelson, Rebecca M. & Weiss, Martin A.
Object Type:
Report
System:
The UNT Digital Library
Studies of non-proportionality in alkali halide and strontium iodide scintillators using SLYNCI
Recently a collaboration of LLNL and LBNL has constructed a second generation Compton coincidence instrument to study the non-proportionality of scintillators. This device, known as SLYNCI (Scintillator Light-Yield Non-proportionality Characterization Instrument), has can completely characterize a sample with less than 24 hours of running time. Thus, SLYNCI enables a number of systematic studies of scintillators since many samples can be processed in a reasonable length of time. These studies include differences in nonproportionality between different types of scintillators, different members of the same family of scintillators, and impact of different doping levels. The results of such recent studies are presented here, including a study of various alkali halides, and the impact of europium doping level in strontium iodide. Directions of future work area also discussed.
Date:
October 14, 2010
Creator:
Ahle, Larry; Bizarri, Gregory; Boatner, Lynn; Cherepy, Nerine J.; Choong, Woon-Seng; Moses, William W. et al.
Object Type:
Article
System:
The UNT Digital Library
Results from a Low-Energy Analysis of the CDMS II Germanium Data
We report results from a reanalysis of data from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with a lowered, 2 keV recoil-energy threshold, to give increased sensitivity to interactions from Weakly Interacting Massive Particles (WIMPs) with masses below {approx}10 GeV/c{sup 2}. This analysis provides stronger constraints than previous CDMS II results for WIMP masses below 9 GeV/c{sup 2} and excludes parameter space associated with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments.
Date:
November 1, 2010
Creator:
Ahmed, Z.; Akerib, D. S.; Arrenberg, S.; Bailey, C. N.; Balakishiyeva, D.; Baudis, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Effect of non-axisymmetric magnetic perturbations on divertor profiles in NSTX H-mode plasmas
None
Date:
June 15, 2010
Creator:
Ahn, J W; Canik, J; Maingi, R; Gray, T; McLean, A; Roquemore, A L et al.
Object Type:
Article
System:
The UNT Digital Library
Characteristics of Divertor Heat and Particle Deposition with Intrinsic and Applied 3-D Fields in NSTX H-mode Plasmas
None
Date:
June 4, 2010
Creator:
Ahn, J. W.; Canik, J.; Maingi, R.; Grey, T. K.; Lore, J. D.; McLean, A. G. et al.
Object Type:
Article
System:
The UNT Digital Library
A simple crunching of the AGS 'bare' machine ORM data - February 2007 - to extract some aspects of AGS transverse coupling at injection and extraction
The objective of this note is to (once again) explore the AGS 'ORM' (orbit response matrix) data taken (by Operations) early during the 2007 run with an AGS bare machine and gold beam. Indeed the present motivation is to extract as much information about the AGS inherent transverse coupling as possible - from general arguments and the copious ORM data. And taking this one step further, (though not accomplished yet) the goal really should be to tell the model how to describe this coupling. 'Bare' as used here means the AGS with no quadrupole, sextupole or octupole magnets powered. Only the main (combined-function) magnet string and dipole bumps necessary to optimize beam survival are powered. 'ORM data' means the systematic recording of the equilibrium orbit beam position monitor response to powering individual dipole corrector magnets. The 'matrix' results from looking at the effect of each of the (12 superperiods X 4 dipoles per superperiod) 'kicks' on each of the (12 X 6) pick up electrodes (pues) in each transverse plane. So then we have two (48 X 72) matrices of numbers from the ORM data. (Though 'pue' usually refers to the hardware in the vacuum chamber and 'bpm' to the …
Date:
November 1, 2010
Creator:
Ahrens, L.
Object Type:
Report
System:
The UNT Digital Library
Linear and chromatic optics measurements at RHIC
Measurements of chromatic beta-beating were carried out for the first time in the RHIC accelerator during Run 2009. The analysis package developed for the LHC was used to extract the off-momentum optics for injection and top energy. Results from the beam experiments and compassion to the optics model are presented. The primary goal of the RHIC experiments were execute an on-line measurement of the optics using the tools developed for the LHC. Turn-by-turn BPM trajectories (typically 1000 turns) acquired immediately after an external dipole kick are numerically analyzed to determine the optical parameters at the location of the beam position monitors (BPMs). For chromatic optics, a similar analysis, but on a beam with finite momentum offset(s). Each optical measurement typically is calculated from multiple data sets to capture statistical variations and ensure reproducibility. The procedure of measurement and analysis is detailed in ref [1, 2]. Two dedicated experiments were performed at RHIC with protons during Run 2009. The first at injection energy and optics and the other at 250 GeV and squeezed optics. The basic RHIC parameters relevant for the two experiments are listed in Table 1.
Date:
May 23, 2010
Creator:
Aiba, M.; Calaga, R.; Aiba, M.; Tomas, R. & Vanbavinkove, G.
Object Type:
Article
System:
The UNT Digital Library
Enabling R&D for accurate simulation of non-ideal explosives.
We implemented two numerical simulation capabilities essential to reliably predicting the effect of non-ideal explosives (NXs). To begin to be able to treat the multiple, competing, multi-step reaction paths and slower kinetics of NXs, Sandia's CTH shock physics code was extended to include the TIGER thermochemical equilibrium solver as an in-line routine. To facilitate efficient exploration of reaction pathways that need to be identified for the CTH simulations, we implemented in Sandia's LAMMPS molecular dynamics code the MSST method, which is a reactive molecular dynamics technique for simulating steady shock wave response. Our preliminary demonstrations of these two capabilities serve several purposes: (i) they demonstrate proof-of-principle for our approach; (ii) they provide illustration of the applicability of the new functionality; and (iii) they begin to characterize the use of the new functionality and identify where improvements will be needed for the ultimate capability to meet national security needs. Next steps are discussed.
Date:
September 1, 2010
Creator:
Aidun, John Bahram; Thompson, Aidan Patrick & Schmitt, Robert Gerard
Object Type:
Report
System:
The UNT Digital Library
Silicon Detector Letter of Intent
This document presents the current status of SiD's effort to develop an optimized design for an experiment at the International Linear Collider. It presents detailed discussions of each of SiD's various subsystems, an overview of the full GEANT4 description of SiD, the status of newly developed tracking and calorimeter reconstruction algorithms, studies of subsystem performance based on these tools, results of physics benchmarking analyses, an estimate of the cost of the detector, and an assessment of the detector R&D needed to provide the technical basis for an optimised SiD.
Date:
May 26, 2010
Creator:
Aihara, H.; Burrows, P. & Oreglia, M.
Object Type:
Report
System:
The UNT Digital Library
Fresh Water Generation from Aquifer-Pressured Carbon Storage
Can we use the pressure associated with sequestration to make brine into fresh water? This project is establishing the potential for using brine pressurized by Carbon Capture and Storage (CCS) operations in saline formations as the feedstock for desalination and water treatment technologies including reverse osmosis (RO) and nanofiltration (NF). Possible products are: Drinking water, Cooling water, and Extra aquifer space for CO{sub 2} storage. The conclusions are: (1) Many saline formation waters appear to be amenable to largely conventional RO treatment; (2) Thermodynamic modeling indicates that osmotic pressure is more limiting on water recovery than mineral scaling; (3) The use of thermodynamic modeling with Pitzer's equations (or Extended UNIQUAC) allows accurate estimation of osmotic pressure limits; (4) A general categorization of treatment feasibility is based on TDS has been proposed, in which brines with 10,000-85,000 mg/L are the most attractive targets; (5) Brines in this TDS range appear to be abundant (geographically and with depth) and could be targeted in planning future CCS operations (including site selection and choice of injection formation); and (6) The estimated cost of treating waters in the 10,000-85,000 mg/L TDS range is about half that for conventional seawater desalination, due to the anticipated pressure …
Date:
February 19, 2010
Creator:
Aines, R. D.; Wolery, T. J.; Bourcier, W. L.; Wolfe, T. & Haussmann, C.
Object Type:
Article
System:
The UNT Digital Library