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UNT Libraries Government Documents Department
244
UNT Libraries Special Collections
47
Oklahoma Historical Society
37
Sterling Municipal Library
11
National Museum of the Pacific War/Admiral Nimitz Foundation
9
Carl Albert Congressional Research and Studies Center
6
Alvin Community College
5
Lee College
4
Patrick Heath Public Library
4
San Antonio Public Library
4
46 More
Collection
Office of Scientific & Technical Information Technical Reports
111
Texas Digital Newspaper Program
92
Congressional Research Service Reports
91
Tocker Foundation Grant
48
Oklahoma Digital Newspaper Program
45
The Black Academy of Arts and Letters Records
34
Government Accountability Office Reports
30
The Baytown Sun
11
Chickasha Newspaper Collection
9
National Museum of the Pacific War Oral History Collection
9
80 More
Country
Year
Month
Day
Language
The Clifton Record (Clifton, Tex.), Vol. 108, No. 70, Ed. 1 Friday, August 29, 2003
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
August 29, 2003
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 108, No. 9, Ed. 1 Wednesday, January 29, 2003
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
January 29, 2003
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 81, No. 246, Ed. 1 Tuesday, July 29, 2003
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 29, 2003
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 81, No. 334, Ed. 1 Wednesday, October 29, 2003
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 29, 2003
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 31, Ed. 1 Wednesday, January 29, 2003
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
January 29, 2003
Creator:
Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 96, No. 5, Ed. 1 Wednesday, October 29, 2003
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
October 29, 2003
Creator:
Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 74, Ed. 1 Sunday, June 29, 2003
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 29, 2003
Creator:
Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
Hondo Anvil Herald (Hondo, Tex.), Vol. 117, No. 22, Ed. 1 Thursday, May 29, 2003
Weekly newspaper from Hondo, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 29, 2003
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 121, No. 43, Ed. 1 Thursday, May 29, 2003
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
May 29, 2003
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 22, Ed. 1 Thursday, May 29, 2003
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
May 29, 2003
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 121, No. 52, Ed. 1 Sunday, June 29, 2003
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
June 29, 2003
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Are both symmetric and buckled dimers on Si(100) minima? Density functional and multireference perturbation theory calculations
We report a spin-unrestricted density functional theory (DFT) solution at the symmetric dimer structure for cluster models of Si(100). With this solution, it is shown that the symmetric structure is a minimum on the DFT potential energy surface, although higher in energy than the buckled structure. In restricted DFT calculations the symmetric structure is a saddle point connecting the two buckled minima. To further assess the effects of electron correlation on the relative energies of symmetric versus buckled dimers on Si(100), multireference second order perturbation theory (MRMP2) calculations are performed on these DFT optimized minima. The symmetric structure is predicted to be lower in energy than the buckled structure via MRMP2, while the reverse order is found by DFT. The implications for recent experimental interpretations are discussed.
Date:
August 29, 2003
Creator:
Jung, Yousung; Shao, Yihan; Gordon, Mark S.; Doren, Douglas J. & Head-Gordon, Martin
Object Type:
Article
System:
The UNT Digital Library
Computational economy improvements in PRISM
The PRISM piecewise solution mapping procedure, in which the solution of the chemical kinetic ODE system is parameterized with quadratic polynomials, is applied to CFD simulations of H{sub 2}+air combustion. Initial cost of polynomial construction is expensive, but it is recouped as the polynomial is reused. We present two methods that help us to parameterize only in places that will ultimately have high reuse. We also implement non-orthogonal Gosset factorial designs, that reduce polynomial construction costs by a factor of two over previously used orthogonal factorial designs.
Date:
January 29, 2003
Creator:
Tonse, Shaheen R. & Brown, Nancy J.
Object Type:
Article
System:
The UNT Digital Library
Effects of Scatter Modeling on Time-Activity Curves Estimated Directly From Dynamic SPECT Projections
Quantitative analysis of uptake and washout of cardiac single photon emission computed tomography (SPECT) radiopharmaceuticals has the potential to provide better contrast between healthy and diseased tissue, compared to conventional reconstruction of static images. Previously, we used B-splines to model time-activity curves (TACs) for segmented volumes of interest and developed fast least-squares algorithms to estimate spline TAC coefficients and their statistical uncertainties directly from dynamic SPECT projection data. This previous work incorporated physical effects of attenuation and depth-dependent collimator response. In the present work, we incorporate scatter and use a computer simulation to study how scatter modeling affects directly estimated TACs and subsequent estimates of compartmental model parameters. An idealized single-slice emission phantom was used to simulate a 15 min dynamic {sup 99m}Tc-teboroxime cardiac patient study in which 500,000 events containing scatter were detected from the slice. When scatter was modeled, unweighted least-squares estimates of TACs had root mean square (RMS) error that was less than 0.6% for normal left ventricular myocardium, blood pool, liver, and background tissue volumes and averaged 3% for two small myocardial defects. When scatter was not modeled, RMS error increased to average values of 16% for the four larger volumes and 35% for the small …
Date:
October 29, 2003
Creator:
Reutter, Bryan W.; Gullberg, Grant T. & Huesman, Ronald H.
Object Type:
Article
System:
The UNT Digital Library
CAPACITIVE TOMOGRAPHY FOR THE LOCATION OF PLASTIC PIPE
Throughout the utility industry, there is high interest in subsurface imaging of plastic, ceramic, and metallic objects because of the cost, reliability, and safety benefits available in avoiding impacts with the existing infrastructure and in reducing inappropriate excavations. Industry interest in locating plastic pipe has resulted in funding available for the development of technologies that enable this imaging. Gas Technology Institute (GTI) proposes to develop a compact and inexpensive capacitive tomography imaging sensor that takes the form of a flat plate or flexible mat that can be placed on the ground to image objects embedded in the soil. A compact, low-cost sensor that can image objects through soil could be applied to multiple operations and will produce a number of cost savings for the gas industry. In a stand-alone mode, it could be used to survey an area prior to excavation. The technology would improve the accuracy and reliability of any operation that involves excavation by locating or avoiding buried objects. An accurate subsurface image of an area will enable less costly keyhole excavations and other cost-saving techniques. Ground penetrating radar (GPR) has been applied to this area with limited success. Radar requires a high-frequency carrier to be injected into …
Date:
July 29, 2003
Creator:
Huber, Brian J.
Object Type:
Report
System:
The UNT Digital Library
Stabilized numerical solutions of three-phase porous media flow using a multiscale finite element formulation
None
Date:
January 29, 2003
Creator:
Juanes, Ruben & Patzek, Tadeusz W.
Object Type:
Report
System:
The UNT Digital Library
DISTRIBUTED GENERATION POWER UNITS AT MARGINAL OIL WELL SITES
The CEC approved funding on April 9, 2003 for $1,000,000.00 instead of the $1,500,000.00 COPE requested for the project. A kickoff meeting with the California Energy Commission (CEC) was held on Monday, April 14, 2003, in their Sacramento, CA offices. Mark Carl, IOGCC project manager for the DOE grant, attended this meeting, along with Bob Fickes with COPE, Edan Prabhu, Mike Merlo and CEC officials. The change in funding by the CEC required a modification in the scope of work and an amended form DOE F 4600.1. The modifications were completed and the IOGCC received approval to commence work on the project on May 9, 2003. On May 29, 2003, Virginia Weyland with DOE/NETL, Mark Carl with IOGCC, and Bob Fickes with COPE, Edan Prabhu and Mike Merlo, consultants with COPE, participated in a teleconference kick-off meeting. During May, 2003, COPE canvassed its membership for potential locations for the four test sites. They received a very good response and have identified at least two potential sites for each of the four test sites. COPE has been obtaining gas samples from the various potential lease sites for analyses to verify the chemical properties analyses which the oil and gas producers provided …
Date:
October 29, 2003
Creator:
Carl, Mark A.
Object Type:
Report
System:
The UNT Digital Library
Fracture and fatigue resistance of Mo-Si-B alloys for ultrahigh-temperature structural applications
Fracture and fatigue-crack growth properties are examined for a series of Mo-Mo3Si-Mo5SiB2 containing alloys, which utilize a continuous a-Mo matrix to achieve unprecedented room-temperature fracture resistance (>20 MPaAm). Mechanistically, these properties are explained in terms of toughening by crack trapping and crack bridging by the more ductile a-Mo phase.
Date:
August 29, 2003
Creator:
Kruzic, J. J.; Schneibel, J. H. & Ritchie, R. O.
Object Type:
Article
System:
The UNT Digital Library
A week of SRI 2003 in San Francisco
The Eighth International Conference on Synchrotron Radiation (SRI 2003) ended its August 25-28 run at the Yerba Buena Center for the Arts in San Francisco with almost as many in attendance as at the beginning. The steady attendance was surely a tribute to the quality of the program and the excitement it generated among the more than 700 registrants who gathered for four days of plenary talks, parallel sessions, and posters, as well as facility tours of the ALS and SSRL on August 29.
Date:
September 29, 2003
Creator:
Robinson, Art
Object Type:
Article
System:
The UNT Digital Library
Towards increased policy relevance in energy modeling
Historically, most energy models were reasonably equipped to assess the impact of a subsidy or change in taxation, but are often insufficient to assess the impact of more innovative policy instruments. We evaluate the models used to assess future energy use, focusing on industrial energy use. We explore approaches to engineering-economic analysis that could help improve the realism and policy relevance of engineering-economic modeling frameworks. We also explore solutions to strengthen the policy usefulness of engineering-economic analysis that can be built from a framework of multi-disciplinary cooperation. We focus on the so-called ''engineering-economic'' (or ''bottom-up'') models, as they include the amount of detail that is commonly needed to model policy scenarios. We identify research priorities for the modeling framework, technology representation in models, policy evaluation and modeling of decision-making behavior.
Date:
July 29, 2003
Creator:
Worrell, Ernst; Ramesohl, Stephan & Boyd, Gale
Object Type:
Article
System:
The UNT Digital Library
Railplug Ignition System for Enhanced Engine Performance and Reduced Maintenance Progress Report
During the first 6 months of this project, four subtasks were scheduled. Two of these commenced earlier than originally proposed. The experimental task, development of new railplug designs, was completed on schedule. The three numerical subtasks were not completed on schedule. However, this is not expected to affect the capability to complete the overall project on schedule. Because we are early in the project, no results or conclusions were generated. Our progress included development of new railplug geometries, to be tested during the second 6 months of the project, and development of an initial 3D model. Progress was also made in development of the appropriate chemical kinetics and generation of a model for the ignition circuit.
Date:
May 29, 2003
Creator:
Matthews, Ron
Object Type:
Report
System:
The UNT Digital Library
Observation of Microwave Induced Zero-Conductance State in Corbino Rings of a Two-Dimensional Electron System
Using Corbino samples they have observed oscillatory dc conductance in a high-mobility two-dimensional electron system when it is subjected to crossed microwave and magnetic fields. At the strongest of the oscillation minima the conductance is found to be vanishingly small, indicating a macroscopic insulating state associated with this minimum. With increasing voltage bias, a crossover from Ohmic to electron-heating regime is observed.
Date:
August 29, 2003
Creator:
Yang, C. L.; Pfeiffer, M. A.; Knuttila, T. A.; Du, R. R.; Pfeiffer,, L. N. & West, K. W.
Object Type:
Article
System:
The UNT Digital Library
Signatures of special nuclear material: High-energy gamma rays following fission
Since September 11, 2001, much effort has been devoted to the development of new and improved means for the detection and prevention of the clandestine transport of special nuclear material (SNM, i.e. {sup 235}U or {sup 239}Pu) and other materials for producing weapons of mass destruction. In a recent Brief Communication, Borozdin et al. showed that cosmic-ray muons could be used to image dense objects inside containers. Here we describe a method for unequivocally identifying SNM in large seagoing containers. Our method is based on the fact that neutron-induced fission of {sup 235}U or {sup 239}Pu is followed by {beta} decays of short-lived fission fragments during which large numbers of high-energy {gamma} rays (above 3000 keV) are emitted. These {gamma} rays have energies above those of natural {gamma} background, are emitted with significantly greater intensity per fission than {beta}-delayed neutrons, have much higher probabilities of escaping hydrogenous cargo loadings than neutrons, and their energy spectra and time dependencies provide a unique signature of SNM. To demonstrate the main properties of high-energy delayed {gamma} rays, we produced neutrons by bombarding a 1-inch thick water-cooled Be target with 16-MeV deuterons from Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. Neutrons were moderated using steel …
Date:
May 29, 2003
Creator:
Norman, Eric B.; Prussin, Stanley G.; Larimer, Ruth-Mary; Shugart, Howard; Browne, Edgardo; Smith, Alan R. et al.
Object Type:
Article
System:
The UNT Digital Library
REDUCING RISK IN LOW-PERMEABILITY GAS FORMATIONS: UNDERSTANDING THE ROCK/FLUID CHARACTERISTICS OF ROCKY MOUNTAIN LARAMIDE BASINS
An anomalous velocity model was constructed for the Wind River Basin (WRB) based on {approx}2000 mi of 2-D seismic data and 175 sonic logs, for a total of 132,000 velocity/depth profiles. Ten cross sections were constructed through the model coincident with known gas fields. In each cross section, an intense, anomalously slow velocity domain coincided with the gas-productive rock/fluid interval. The anomalous velocity model: (1) Easily isolates gas-charged rock/fluid systems characterized by anomalously slow velocities and water-rich rock/fluid systems characterized by normal velocities; and (2) Delineates the regional velocity inversion surface, which is characterized by steepening of the Ro/depth gradient, a significant increase in capillary displacement pressure, a significant change in formation water composition, and acceleration of the reaction rate of smectite-to-illite diagenesis in mixed-layer clays. Gas chimneys are observed as topographic highs on the regional velocity inversion surface. Beneath the surface are significant fluid-flow compartments, which have a gas-charge in the fluid phase and are isolated from meteoric water recharge. Water-rich domains may occur within regional gas-charged compartments, but are not being recharged from the meteoric water system (i.e., trapped water). The WRB is divided into at least two regionally prominent fluid-flow compartments separated by the velocity inversion surface: …
Date:
December 29, 2003
Creator:
Surdam, Ronald C.
Object Type:
Report
System:
The UNT Digital Library