Partner
UNT Libraries Government Documents Department
273
UNT Libraries Special Collections
91
Oklahoma Historical Society
40
UNT Libraries
20
National Museum of the Pacific War/Admiral Nimitz Foundation
9
Sterling Municipal Library
9
Carl Albert Congressional Research and Studies Center
8
Harper Library
7
Dallas Area Rapid Transit (DART)
5
UNT Music Library
5
59 More
Collection
Office of Scientific & Technical Information Technical Reports
164
Texas Digital Newspaper Program
131
Congressional Research Service Reports
77
Tocker Foundation Grant
57
The Black Academy of Arts and Letters Records
56
Oklahoma Digital Newspaper Program
50
Government Accountability Office Reports
30
KXAS-NBC 5 News Collection
16
The Greensheet
13
Abilene Library Consortium
10
102 More
Degree Department
Decade
Month
Day
Language
569 Matching Results
Results open in a new window/tab.
Identity Theft: Available Data Indicate Growth in Prevalence and Cost
Testimony issued by the General Accounting Office with an abstract that begins "Identity theft involves "stealing" another person's personal identifying information, such as their Social Security Number (SSN), date of birth, or mother's maiden name, and using it to fraudulently establish credit, run up debt, or take over existing financial accounts. The prevalence and cost of identity theft seem to be increasing. Recently introduced bills seek to prevent identity theft and enforce laws prohibiting identity theft. Since May 1998, various actions--particularly passage of federal and state statutes--have been taken to address identity theft. Precise, statistical measurement of identity theft trends is difficult for several reasons. Federal law enforcement agencies lack information systems to track identity theft cases. Also, identity theft almost always accompanies white-collar or financial crimes, such as bank fraud, credit card or access device fraud, or the use of counterfeit financial instruments. Data sources, such as consumer complaints and hotline allegations, can be used as proxies for gauging the prevalence of identity theft. Law enforcement investigations and prosecutions of identity theft-related crimes, such as bank and credit card fraud, also provide data."
Date:
February 14, 2002
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Focus Group Report: University of North Texas - Denton - August 2005
This report discusses a focus group that was part of the Web-at-Risk project. The report includes the following three sections: (a) the methodology used to conduct the focus groups and analyze the data, (b) the detailed results of the analysis organized into phases of the collection development process, and (c) a discussion of the key findings.
Date:
February 14, 2006
Creator:
Murray, Kathleen R. & Hsieh, Inga K.
Object Type:
Report
System:
The UNT Digital Library
DESIGN OF THE DEMOSNTRATION BULK VITRIFICATION SYSTEM FOR THE SUPPLEMENTAL TREATMENT OF LOW ACTIVITY TANK WASTE AT HANFORD
In June 2004, the Demonstration Bulk Vitrification System (DBVS) was initiated with the intent to design, construct, and operate a full-scale bulk vitrification pilot-plant to treat low-activity tank waste from Hanford Tank 241-S-109. The DBVS facility uses In-Container Vitrification{trademark} (ICV{trademark}) at the core of the treatment process. The basic process steps combine liquid low-activity waste (LAW) and glassformers; dry the mixture; and then vitrify the mixture in a batch feed-while-melt process in a refractory lined steel container. Off-gases are processed through a state-of-the-art air pollution control system including sintered-metal filtration, thermal oxidation, acid gas scrubbing, and high-efficiency particulate air (HEPA) and high-efficiency gas adsorber (HEGA) filtration. Testing has focused on development and validation of the waste dryer, ICV, and sintered-metal filters (SMFs) equipment, operations enhancements, and glass formulation. With a parallel testing and design process, testing has allowed improvements to the DBVS equipment configuration and operating methodology, since its original inception. Design improvements include optimization of refractory panels in the ICV, simplifying glassformer addition equipment, increasing the number of waste feed chutes to the ICV, and adding capability for remote clean-out of piping, In addition, the U.S. Department of Energy (DOE) has provided an independent review of the entire DBVS …
Date:
February 14, 2008
Creator:
JE, VAN BEEK
Object Type:
Article
System:
The UNT Digital Library
Analysis of the Argonne Distance Tabletop Exercise Method
The purpose of this report is to summarize and evaluate the Argonne Distance Tabletop Exercise (DISTEX) method. DISTEX is intended to facilitate multi-organization, multi-objective tabletop emergency response exercises that permit players to participate from their own facility's incident command center. This report is based on experience during its first use during the FluNami 2007 exercise, which took place from September 19-October 17, 2007. FluNami 2007 exercised the response of local public health officials and hospitals to a hypothetical pandemic flu outbreak. The underlying purpose of the DISTEX method is to make tabletop exercising more effective and more convenient for playing organizations. It combines elements of traditional tabletop exercising, such as scenario discussions and scenario injects, with distance learning technologies. This distance-learning approach also allows playing organizations to include a broader range of staff in the exercise. An average of 81.25 persons participated in each weekly webcast session from all playing organizations combined. The DISTEX method required development of several components. The exercise objectives were based on the U.S. Department of Homeland Security's Target Capabilities List. The ten playing organizations included four public health departments and six hospitals in the Chicago area. An extent-of-play agreement identified the objectives applicable to each …
Date:
February 14, 2008
Creator:
Tanzman, E. A.; Nieves, L. A. & Sciences, Decision and Information
Object Type:
Report
System:
The UNT Digital Library
Decomposition of the Multistatic Response Matrix and Target Characterization
Decomposition of the time-reversal operator for an array, or equivalently the singular value decomposition of the multistatic response matrix, has been used to improve imaging and localization of targets in complicated media. Typically, each singular value is associated with one scatterer even though it has been shown in several cases that a single scatterer can generate several singular values. In this paper we review the analysis of the time-reversal operator (TRO), or equivalently the multistatic response matrix (MRM), of an array system and a small target. We begin with two-dimensional scattering from a small cylinder then show the results for a small non-spherical target in three dimensions. We show that the number and magnitudes of the singular values contain information about target composition, shape, and orientation.
Date:
February 14, 2008
Creator:
Chambers, D H
Object Type:
Article
System:
The UNT Digital Library
Evaluation of Statistical Methodologies Used in U. S. Army Ordnance and Explosive Work
Oak Ridge National Laboratory was tasked by the U.S. Army Engineering and Support Center (Huntsville, AL) to evaluate the mathematical basis of existing software tools used to assist the Army with the characterization of sites potentially contaminated with unexploded ordnance (UXO). These software tools are collectively known as SiteStats/GridStats. The first purpose of the software is to guide sampling of underground anomalies to estimate a site's UXO density. The second purpose is to delineate areas of homogeneous UXO density that can be used in the formulation of response actions. It was found that SiteStats/GridStats does adequately guide the sampling so that the UXO density estimator for a sector is unbiased. However, the software's techniques for delineation of homogeneous areas perform less well than visual inspection, which is frequently used to override the software in the overall sectorization methodology. The main problems with the software lie in the criteria used to detect nonhomogeneity and those used to recommend the number of homogeneous subareas. SiteStats/GridStats is not a decision-making tool in the classical sense. Although it does provide information to decision makers, it does not require a decision based on that information. SiteStats/GridStats provides information that is supplemented by visual inspections, land-use …
Date:
February 14, 2000
Creator:
Ostrouchov, G
Object Type:
Report
System:
The UNT Digital Library
Versatile microbial surface-display for environmental remediation and biofuels production
Surface display is a powerful technique that utilizes natural microbial functional components to express proteins or peptides on the cell exterior. Since the reporting of the first surface-display system in the mid-1980s, a variety of new systems have been reported for yeast, Gram-positive and Gram-negative bacteria. Non-conventional display methods are emerging, eliminating the generation of genetically modified microorganisms. Cells with surface display are used as biocatalysts, biosorbents and biostimulants. Microbial cell-surface display has proven to be extremely important for numerous applications ranging from combinatorial library screening and protein engineering to bioremediation and biofuels production.
Date:
February 14, 2008
Creator:
Wu, Cindy H.; Mulchandani, Ashok & Chen, wilfred
Object Type:
Article
System:
The UNT Digital Library
Human Factors Considerations in New Nuclear Power Plants: Detailed Analysis.
This Nuclear Regulatory Commission (NRC) sponsored study has identified human-performance issues in new and advanced nuclear power plants. To identify the issues, current industry developments and trends were evaluated in the areas of reactor technology, instrumentation and control technology, human-system integration technology, and human factors engineering (HFE) methods and tools. The issues were organized into seven high-level HFE topic areas: Role of Personnel and Automation, Staffing and Training, Normal Operations Management, Disturbance and Emergency Management, Maintenance and Change Management, Plant Design and Construction, and HFE Methods and Tools. The issues where then prioritized into four categories using a 'Phenomena Identification and Ranking Table' methodology based on evaluations provided by 14 independent subject matter experts. The subject matter experts were knowledgeable in a variety of disciplines. Vendors, utilities, research organizations and regulators all participated. Twenty issues were categorized into the top priority category. This Brookhaven National Laboratory (BNL) technical report provides the detailed methodology, issue analysis, and results. A summary of the results of this study can be found in NUREG/CR-6947. The research performed for this project has identified a large number of human-performance issues for new control stations and new nuclear power plant designs. The information gathered in this project …
Date:
February 14, 2008
Creator:
O'Hara, John; Higgins, James C.; Brown, William S. & Fink, Robert
Object Type:
Report
System:
The UNT Digital Library
Molecular Dynamics Simulations of Temperature Equilibration in Dense Hydrogen
The temperature equilibration rate in dense hydrogen (for both T{sub i} > T{sub e} and T{sub i} < T{sub e}) has been calculated with large-scale molecular dynamics simulations for temperatures between 10 and 300 eV and densities between 10{sup 20}/cc to 10{sup 24}/cc. Careful attention has been devoted to convergence of the simulations, including the role of semiclassical potentials. We find that for Coulomb logarithms L {approx}> 1, Brown-Preston-Singleton [Brown et al., Phys. Rep. 410, 237 (2005)] with the sub-leading corrections and the fit of Gericke-Murillo-Schlanges [Gericke et al., PRE 65, 036418 (2003)] to the T-matrix evaluation of the collision operator, agrees with the MD data to within the error bars of the simulation. For more strongly-coupled plasmas where L {approx}< 1, our numerical results are consistent with the fit of Gericke-Murillo-Schlanges.
Date:
February 14, 2008
Creator:
Glosli, J; Graziani, F; More, R; Murillo, M; Streitz, F; Surh, M et al.
Object Type:
Article
System:
The UNT Digital Library
Hydrologic Data and Evaluation for Model Validation Wells, MV-1, MV-2, and MV-3 near the Project Shoal Area
In 2006, a drilling campaign was conducted at the Project Shoal Area (PSA) to provide information for model validation, emplace long-term monitoring wells, and develop baseline geochemistry for long term hydrologic monitoring. Water levels were monitored in the vicinity of the drilling, in the existing wells HC-1 and HC-6, as well as in the newly drilled wells, MV-1, MV-2 and MV-3 and their associated piezometers. Periodic water level measurements were also made in existing wells HC-2, HC-3, HC-4, HC-5 and HC-7. A lithium bromide chemical tracer was added to drilling fluids during the installation of the monitoring and validation (MV) wells and piezometers. The zones of interest were the fractured, jointed and faulted horizons within a granitic body. These horizons generally have moderate hydraulic conductivities. As a result, the wells and their shallower piezometers required strenuous purging and development to remove introduced drilling fluids as evidenced by bromide concentrations. After airlift and surging well development procedures, the wells were pumped continuously until the bromide concentration was less then 1 milligram per liter (mg/L). Water quality samples were collected after the well development was completed. Tritium scans were preformed before other analyses to ensure the absence of high levels of radioactivity. …
Date:
February 14, 2007
Creator:
Lyles, B.; Oberlander, P.; Gillespie, D.; Donithan, D.; Chapman, J. & Healey, J.
Object Type:
Report
System:
The UNT Digital Library
An Implementation and Evaluation of the AMLS Method for SparseEigenvalue Problems
We describe an efficient implementation and present aperformance study of an algebraic multilevel sub-structuring (AMLS)method for sparse eigenvalue problems. We assess the time and memoryrequirements associated with the key steps of the algorithm, and compareitwith the shift-and-invert Lanczos algorithm in computational cost. Oureigenvalue problems come from two very different application areas: theaccelerator cavity design and the normal mode vibrational analysis of thepolyethylene particles. We show that the AMLS method, when implementedcarefully, is very competitive with the traditional method in broadapplication areas, especially when large numbers of eigenvalues aresought.
Date:
February 14, 2006
Creator:
Gao, Weiguo; Li, Xiaoye S.; Yang, Chao & Bai, Zhaojun
Object Type:
Article
System:
The UNT Digital Library
Preliminary Evaluation of a Portable Handheld Combined Gamma and Neutron Directional Isotopic Identifying Detector
Purpose: To simulate the performance of a portable dual gamma and neutron identification detector array with dual directional detection capability for preliminary algorithm evaluation. Experimental procedures: Monte Carlo N-Particle (MCNP) analysis on a compact array of borated polyvinyl toluene light pipes and photomultiplier tubes, standard spectral histogramming, and directional detection capability simulations. Results: Results demonstrate that the detector system is fully capable of correcting for background variations when identifying common gamma and neutron sources while simultaneously providing source location direction estimates. Familiar anthropogenic isotopes are readily identified such as Am-241, Cs-137, Cf-252 and Co-60. Directional resolution is estimated to be within approximately 15 degrees. Specifically, all features expected for the array have been demonstrated to be credible through MCNP analysis. Conclusions: Use of this handheld dual neutron and gamma spectrometer has the promise of widespread applicability. By ultimately correlating MCNP results with empirical measurements, substantial confidence can be placed on predicting detector response to sufficiently similar spectral sources under alternate experimental configurations. Use of the detector has substantial promise for operational health physics applications.
Date:
February 14, 2008
Creator:
Hayes, Robert
Object Type:
Article
System:
The UNT Digital Library
HANFORD DOUBLE SHELL TANK (DST) THERMAL & SEISMIC PROJECT BUCKLING EVALUATION METHODS & RESULTS FOR THE PRIMARY TANKS
This report documents a detailed buckling evaluation of the primary tanks in the Hanford double-shell waste tanks (DSTs), which is part of a comprehensive structural review for the Double-Shell Tank Integrity Project. This work also provides information on tank integrity that specifically responds to concerns raised by the Office of Environment, Safety, and Health (ES&H) Oversight (EH-22) during a review of work performed on the double-shell tank farms and the operation of the aging waste facility (AWF) primary tank ventilation system. The current buckling review focuses on the following tasks: (1) Evaluate the potential for progressive I-bolt failure and the appropriateness of the safety factors that were used for evaluating local and global buckling. The analysis will specifically answer the following questions: (a) Can the EH-22 scenario develop if the vacuum is limited to -6.6-inch water gage (w.g.) by a relief valve? (b) What is the appropriate factor of safety required to protect against buckling if the EH-22 scenario can develop? (c) What is the appropriate factor of safety required to protect against buckling if the EH-22 scenario cannot develop? (2) Develop influence functions to estimate the axial stresses in the primary tanks for all reasonable combinations of tank loads, …
Date:
February 14, 2007
Creator:
TC, MACKEY; KI, JOHNSON; JE, DEIBLER; SP, PILLI; MW, RINKER & NK, KARRI
Object Type:
Report
System:
The UNT Digital Library
Devloping High Energy Radiography for HED Experiments on NIF and Omega-EP
High energy radiography capabilities are essential for many future DNT/HED experiments on NIF. We have been developing bright, high-energy (15-100 keV), high resolution (< 20 {micro}m), 1-D and 2-D radiography solutions for DNT experiments on NIF. In this LDRD, we have made significant progress utilizing high-energy, high-intensity, short-pulse lasers to generate hard K-{alpha} photons. High energy K-{alpha} sources are created by hot electrons interacting in the target fluor material after irradiation by lasers with intensity I{sub L} > 10{sup 17} W/cm{sup 2}. High resolution point projection 1-D and 2-D radiography have been achieved using {mu}-foil and {mu}-wire targets attached to low-Z substrate materials. The {mu}-wire size was 10 x 10 x 300 {micro}m on a 300 x 300 x 5 {micro}m CH substrate creating the point source size equivalent to these micro targets. This unique technique will utilize the NIF short pulse laser (ARC) as a backlighter suitable for the full range of DNT science experiments on NIF.
Date:
February 14, 2008
Creator:
Maddox, B.; Tommasini, R.; Remington, B.; Key, M. & Town, R.
Object Type:
Report
System:
The UNT Digital Library
R-LODs: Fast LOD-Based Ray Tracing of Massive Models
We present a novel LOD (level-of-detail) algorithm to accelerate ray tracing of massive models. Our approach computes drastic simplifications of the model and the LODs are well integrated with the kd-tree data structure. We introduce a simple and efficient LOD metric to bound the error for primary and secondary rays. The LOD representation has small runtime overhead and our algorithm can be combined with ray coherence techniques and cache-coherent layouts to improve the performance. In practice, the use of LODs can alleviate aliasing artifacts and improve memory coherence. We implement our algorithm on both 32bit and 64bit machines and able to achieve up to 2.20 times improvement in frame rate of rendering models consisting of tens or hundreds of millions of triangles with little loss in image quality.
Date:
February 14, 2006
Creator:
Yoon, S.; Lauterbach, C. & Manocha, D.
Object Type:
Article
System:
The UNT Digital Library
Development of the Low Swirl Injector for Fuel-Flexible Gas Turbines
Industrial gas turbines are primarily fueled with natural gas. However, changes in fuel cost and availability, and a desire to control carbon dioxide emissions, are creating pressure to utilize other fuels. There is an increased interest in the use of fuels from coal gasification, such as syngas and hydrogen, and renewable fuels, such as biogas and biodiesel. Current turbine fuel injectors have had years of development to optimize their performance with natural gas. The new fuels appearing on the horizon can have combustion properties that differ substantially from natural gas. Factors such as turbulent flame speed, heat content, autoignition characteristics, and range of flammability must be considered when evaluating injector performance. The low swirl injector utilizes a unique flame stabilization mechanism and is under development for gas turbine applications. Its design and mode of operation allow it to operate effectively over a wide range of conditions. Studies conducted at LBNL indicate that the LSI can operate on fuels with a wide range of flame speeds, including hydrogen. It can also utilize low heat content fuels, such as biogas and syngas. We will discuss the low swirl injector operating parameters, and how the LSC performs with various alternative fuels.
Date:
February 14, 2007
Creator:
Littlejohn, D.; Cheng, R.K.; Nazeer,W.A. & Smith, K.O
Object Type:
Article
System:
The UNT Digital Library
WIPP Facility Work Plan for Solid Waste Management Units
This 2002 Facility Work Plan (FWP) has been prepared as required by Module VII, Permit Condition VII.U.3 of the Waste Isolation Pilot Plant (WIPP) Hazardous Waste Facility Permit, NM4890139088-TSDF (the Permit) (New Mexico Environment Department [NMED], 1999a), and incorporates comments from the NMED received on December 6, 2000 (NMED, 2000a). This February 2002 FWP describes the programmatic facility-wide approach to future investigations at Solid Waste Management Units (SWMU) and Areas of Concern (AOC) specified in the Permit. The Permittees are evaluating data from previous investigations of the SWMUs and AOCs against the most recent guidance proposed by the NMED. Based on these data, and completion of the August 2001 sampling requested by the NMED, the Permittees expect that no further sampling will be required and that a request for No Further Action (NFA) at the SWMUs and AOCs will be submitted to the NMED. This FWP addresses the current Permit requirements. It uses the results of previous investigations performed at WIPP and expands the investigations as required by the Permit. As an alternative to the Resource Conservation and Recovery Act (RCRA) Facility Investigation (RFI) specified in Module VII of the Permit, current NMED guidance identifies an Accelerated Corrective Action Approach …
Date:
February 14, 2002
Creator:
Westinghouse TRU Solutions LLC
Object Type:
Report
System:
The UNT Digital Library
Greensheet (Houston, Tex.), Vol. 37, No. 14, Ed. 1 Tuesday, February 14, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
February 14, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 20, Ed. 1 Thursday, February 14, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
February 14, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 21, Ed. 1 Thursday, February 14, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
February 14, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 38, No. 18, Ed. 1 Wednesday, February 14, 2007
Free weekly newspaper that includes business and classified advertising.
Date:
February 14, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
[Email from Caro Bosca to Eleanor Brown, February 14, 2005]
Email from Caro Bosca to Eleanor Brown discussing room reservations for the board meeting in Washington, D.C. She also provides Brown with a list of the email addresses for the current board of directors and committee chairs.
Date:
February 14, 2005
Creator:
Bosca, Caro Bayley
Object Type:
Letter
System:
The Portal to Texas History
Bogata News (Bogata, Tex.), Vol. 91, No. 38, Ed. 1 Thursday, February 14, 2002
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
February 14, 2002
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 157, No. 52, Ed. 1 Wednesday, February 14, 2007
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
February 14, 2007
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History