Partner
UNT Libraries Government Documents Department
253
UNT Libraries Special Collections
52
Oklahoma Historical Society
37
Mexic-Arte Museum
21
National Museum of the Pacific War/Admiral Nimitz Foundation
20
Sterling Municipal Library
12
Alvin Community College
5
Carl Albert Congressional Research and Studies Center
5
Nellie Pederson Civic Library
3
FM Buck Richards Library
3
48 More
Collection
Office of Scientific & Technical Information Technical Reports
173
Texas Digital Newspaper Program
81
Congressional Research Service Reports
60
Tocker Foundation Grant
46
Oklahoma Digital Newspaper Program
44
LGBT Collections
34
Texas Cultures Online
23
National Museum of the Pacific War Oral History Collection
20
National Museum of the Pacific War Digital Archive
20
Government Accountability Office Reports
17
79 More
Degree Department
Country
States
Year
Month
Day
Language
Results:
1 - 24 of
479
next
Accuracy and precision of compartmental model parameters obtained from directly estimated dynamic SPECT time-activity curves
None
Date:
December 2, 2002
Creator:
Reutter, Bryan W.; Gullberg, Grant T. & Huesman, Ronald H.
Object Type:
Article
System:
The UNT Digital Library
Advanced Characterization of Fractured Reservoirs in Carbonate Rocks: The Michigan Basin
The purpose of the study was to collect and analyze existing data on the Michigan Basin for fracture patterns on scales ranging form thin section to basin. The data acquisition phase has been successfully concluded with the compilation of several large digital databases containing nearly all the existing information on formation tops, lithology and hydrocarbon production over the entire Michigan Basin. These databases represent the cumulative result of over 80 years of drilling and exploration.
Date:
December 2, 2002
Creator:
Wood, James R. & Harrison, William B.
Object Type:
Report
System:
The UNT Digital Library
Advantages of improved timing accuracy in PET cameras using LSOscintillator
PET scanners based on LSO have the potential forsignificantly better coincidence timing resolution than the 6 ns fwhmtypically achieved with BGO. This study analyzes the performanceenhancements made possible by improved timing as a function of thecoincidence time resolution. If 500 ps fwhm coincidence timing resolutioncan be achieved in a complete PET camera, the following four benefits canbe realized for whole-body FDG imaging: 1) The random event rate can bereduced by using a narrower coincidence timing window, increasing thepeak NECR by~;50 percent. 2) Using time-of-flight in the reconstructionalgorithm will reduce the noise variance by a factor of 5. 3) Emissionand transmission data can be acquired simultaneously, reducing the totalscan time. 4) Axial blurring can be reduced by using time-of-flight todetermine the correct axial plane that each event originated from. Whiletime-of-flight was extensively studied in the 1980's, practical factorslimited its effectiveness at that time and little attention has been paidto timing in PET since then. As these potential improvements aresubstantial and the advent of LSO PET cameras gives us the means toobtain them without other sacrifices, efforts to improve PET timingshould resume after their long dormancy.
Date:
December 2, 2002
Creator:
Moses, William W.
Object Type:
Article
System:
The UNT Digital Library
AIDS in Africa
Sub-Saharan Africa has been far more severely affected by AIDS than any other part of the world. The United Nations reports that 25.3 million adults and children are infected with the HIV virus in the region, which has about 10% of the world's population but more than 70% of the worldwide total of infected people. This report discusses this issue in detail, including the cause of the African AIDS epidemic, the social and economic consequences, response and treatment, and U.S. policy.
Date:
December 2, 2002
Creator:
Copson, Raymond W.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. [104], No. [220], Ed. 1 Monday, December 2, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Sun (Alvin, Tex.), Vol. 111, No. 93, Ed. 1 Monday, December 2, 2002
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 2002
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Appropriations for FY2003: Foreign Operations, Export Financing and Related Programs
Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress considers each year. It is designed to supplement the information provided by the House and Senate Foreign Operations Appropriations Subcommittees.
Date:
December 2, 2002
Creator:
Nowels, Larry
Object Type:
Report
System:
The UNT Digital Library
Assembly of Oriented Virus Arrays by Chemo-Selective Ligation Methods and Nanolithography Techniques
The present work describes our ongoing efforts towards the creation of nano-scaled ordered arrays of protein/virus covalently attached to site-specific chemical linkers patterned by different nanolithograpy techniques. We will present a new and efficient solid-phase approach for the synthesis of chemically modified long alkyl-thiols. These compounds can be used to introduce chemoselective reacting groups onto gold and silicon-based surfaces. Furthermore, these modified thiols have been used to create nanometric patterns by using different nanolithography techniques. We will show that these patterns can react chemoselectively with proteins and/or virus which have been chemically or recombinantly modified to contain complementary chemical groups at specific positions thus resulting in the oriented attachment of the protein or virus to the surface.
Date:
December 2, 2002
Creator:
Camarero, J. A.; Cheung, C. L.; Lin, T.; Johnson, J. E.; Weeks, B. L.; Noy, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Automobile and Light Truck Fuel Economy: The CAFE Standards
One of the least controversial provisions of the Energy Policy and Conservation Act of 1975 (P.L. 94-163) established corporate average fuel economy (CAFE) standards for new passenger cars. This report presents a brief background and analysis regarding the price of crude oil that brought into sharp focus the fuel inefficiency of U.S. automobiles. The report also discusses the previous issues and the most recent developments regarding CAFE.
Date:
December 2, 2002
Creator:
Bamberger, Robert L.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 81, No. 6, Ed. 1 Monday, December 2, 2002
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 2002
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Beam Physics in X-Ray Radiography Facilities
Performance of x-ray radiography facilities requires focusing the electron beams to sub-millimeter spots on the x-ray converters. Ions extracted from a converter by impact of a high intensity beam can partially neutralize the beam space charge and change the final focusing system. We will discuss these ion effects and mitigation.
Date:
December 2, 2002
Creator:
Chen, Y. J.; Caporaso, G. J.; Chambers, F. W.; Falabella, S.; Goldin, F. J.; Guethlein, G. et al.
Object Type:
Article
System:
The UNT Digital Library
Beam Tools for Geant4 (User's Guide)
Geant4 is a tool kit developed by a collaboration of physicists and computer professionals in the high energy physics field for simulation of the passage of particles through matter. The motivation for the development of the Beam Tools is to extend the Geant4 applications to accelerator physics. The Beam Tools are a set of C++ classes designed to facilitate the simulation of accelerator elements: r.f. cavities, magnets, absorbers, etc. These elements are constructed from Geant4 solid volumes like boxes, tubes, trapezoids, or spheers. There are many computer programs for beam physics simulations, but Geant4 is ideal to model a beam through a material or to integrate a beam line with a complex detector. There are many such examples in the current international High Energy Physics programs. For instance, an essential part of the R&D associated with the Neutrino Source/Muon Collider accelerator is the ionization cooling channel, which is a section of the system aimed to reduce the size of the muon beam in phase space. The ionization cooling technique uses a combination of linacs and light absorbers to reduce the transverse momentum and size of the beam, while keeping the longitudinal momentum constant. The MuCool/MICE (muon cooling) experiments need accurate …
Date:
December 2, 2002
Creator:
V.Daniel Elvira, Paul Lebrun and Panagiotis Spentzouris
Object Type:
Report
System:
The UNT Digital Library
Chemical Treatment of US Department of Energy High Level and Low Level Waste to Obtain a Pure Radiochemical Fraction for Determination of Californium Alpha-Decay Content
We have developed a chemical separation technique that allows the radiochemical determination of the californium a-decay content in Department of Energy (DOE) high level wastes from the Hanford and Savannah River sites. The chemical separation technique uses a series of column extraction chromatography steps that use Eichrom Industries' lanthanide and actinide plus 3 oxidation state selective Ln-resin(R) and the transuranic selective plus 4 oxidation state TRU-resin(R) to obtain intermediate product phases in dilute nitric acid. The technique has been demonstrated on three types of authentic DOE high and low level waste samples. We obtain discrimination from Pu a-activity by a factor of over 200 and from Cm-244 a-activity by a factor approaching 1700. Californium recoveries are measured by addition of a Cf-249 spike and are in the range of 50 percent to 90 percent in the synthetic samples and are in the range of 1.4 percent to 48 percent for the authentic DOE waste samples.
Date:
December 2, 2002
Creator:
Dewberry, R.
Object Type:
Article
System:
The UNT Digital Library
Child Nutrition and WIC Legislation in the 106th and 107th Congresses
This report provides information about the Child Nutrition and Women, Infant and children (WIC) Legislation in the 106th and 107th Congresses.
Date:
December 2, 2002
Creator:
Richardson, Joe
Object Type:
Report
System:
The UNT Digital Library
A CMOS Active Pixel Sensor for Charged Particle Detection
Active Pixel Sensor (APS) technology has shown promise for next-generation vertex detectors. This paper discusses the design and testing of two generations of APS chips. Both are arrays of 128 by 128 pixels, each 20 by 20 {micro}m. Each array is divided into sub-arrays in which different sensor structures (4 in the first version and 16 in the second) and/or readout circuits are employed. Measurements of several of these structures under Fe{sup 55} exposure are reported. The sensors have also been irradiated by 55 MeV protons to test for radiation damage. The radiation increased the noise and reduced the signal. The noise can be explained by shot noise from the increased leakage current and the reduction in signal is due to charge being trapped in the epi layer. Nevertheless, the radiation effect is small for the expected exposures at RHIC and RHIC II. Finally, we describe our concept for mechanically supporting a thin silicon wafer in an actual detector.
Date:
December 2, 2002
Creator:
Matis, Howard S.; Bieser, Fred; Kleinfelder, Stuart; Rai, Gulshan; Retiere, Fabrice; Ritter, Hans George et al.
Object Type:
Article
System:
The UNT Digital Library
Combating Child Pornography: Federal Agencies Coordinate Law Enforcement Efforts, but an Opportunity Exists for Further Enhancement
A letter report issued by the General Accounting Office with an abstract that begins "The trafficking of child pornography through increasingly sophisticated electronic media, including Internet chat rooms, newsgroups, and peer-to-peer networks, has made such images more readily accessible. These technological advances have created more challenges for law enforcement, including requiring effective coordination to combat this crime. The federal law enforcement agencies that play a role in investigating child pornography are the FBI, Customs, Postal Inspection Service, and Secret Service. This report provides information on the coordination of federal efforts to combat child pornography. Specifically, it (1) identifies mechanisms federal agencies have in place to combat child pornography and (2) provides information on an opportunity to further enhance coordination among federal law enforcement agencies."
Date:
December 2, 2002
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
COMBUSTION TURBINE (CT) HOT SECTION COATING LIFE MANAGEMENT
The integrity of coatings used in hot section components of combustion turbine is crucial to the reliability of the buckets. This project was initiated in recognition of the need for predicting the life of coatings analytically, and non destructively; correspondingly, three principal tasks were established. Task 1, with the objective of analytically developing stress, strain and temperature distributions in the bucket and thereby predicting thermal fatigue (TMF) damage for various operating conditions; Task 2 with the objective of developing eddy current techniques to measure both TMF damage and general degradation of coatings and, Task 3, with the objective of developing mechanism based algorithms. This report is a record of the progress to date on these 3 key tasks. Two supporting tasks relating to field validation (Task 4) and economic analysis (Task 5) have not yet been initiated.
Date:
December 2, 2002
Creator:
Viswanathan, R.; Gandy, D.; Krzywosz, K.; Cheruvu, S. & Wan, E.
Object Type:
Report
System:
The UNT Digital Library
Cooperative Threat Reduction Program Annual Report
Correspondence issued by the General Accounting Office with an abstract that begins "Section 1308 of the National Defense Authorization Act for Fiscal Year 2001 requires the Comptroller General to provide Congress with an assessment of the Department of Defense's annual report on the Cooperative Threat Reduction (CTR) program within 90 days of the submission of the annual report to Congress. The Department of Defense submitted its CTR annual report for Fiscal Year 2002 to Congress on September 3, 2002 almost 19 months after the submission date mandated by law. GAO found that the report (1) did not clearly set forth future funding data required by Congress, (2) did not include certain important planning elements, (3) in some instances asserted the use of a more rigorous methodology than was actually used, and (4) incorporated some but not all prior GAO recommendations."
Date:
December 2, 2002
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Daily Journal (Perry, Okla.), Vol. 109, No. 234, Ed. 1 Monday, December 2, 2002
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 2002
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Deep-Burn Modular Helium Reactor Fuel Development Plan
This document contains the workscope, schedule and cost for the technology development tasks needed to satisfy the fuel and fission product transport Design Data Needs (DDNs) for the Gas Turbine-Modular Helium Reactor (GT-MHR), operating in its role of transmuting transuranic (TRU) nuclides in spent fuel discharged from commercial light-water reactors (LWRs). In its application for transmutation, the GT-MHR is referred to as the Deep-Burn MHR (DB-MHR). This Fuel Development Plan (FDP) describes part of the overall program being undertaken by the U.S. Department of Energy (DOE), utilities, and industry to evaluate the use of the GT-MHR to transmute transuranic nuclides from spent nuclear fuel. The Fuel Development Plan (FDP) includes the work on fuel necessary to support the design and licensing of the DB-MHR. The FDP is organized into ten sections. Section 1 provides a summary of the most important features of the plan, including cost and schedule information. Section 2 describes the DB-MHR concept, the features of its fuel and the plan to develop coated particle fuel for transmutation. Section 3 describes the knowledge base for fabrication of coated particles, the experience with irradiation performance of coated particle fuels, the database for fission product transport in HTGR cores, and …
Date:
December 2, 2002
Creator:
McEachern, D
Object Type:
Report
System:
The UNT Digital Library
Defense Acquisitions: Factors Affecting Outcomes of Advanced Concept Technology Demonstrations
A letter report issued by the General Accounting Office with an abstract that begins "The Advanced Concept Technology Demonstration (ACTD) program was started by the Department of Defense (DOD) as a way to get new technologies that meet critical military needs into the hands of users faster and less cost. GAO was asked to examine DOD's process for structuring and executing ACTDs."
Date:
December 2, 2002
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Effect of electrode density on cycle performance and irreversible capacity loss for natural graphite anode in lithium ion batteries
The effect of electrode thickness and density for unpressed and pressed natural graphite electrodes were studied using electrochemical characterization. Pressing the graphite electrode decreases the reversible capacity and the irreversible capacity loss during formation. As electrode density increased, the capacity retention at high rate increased until 0.9g/cm{sup 3}, and then decreased. The cycle performances of the pressed graphite electrodes were more stable than the unpressed one. Pressing graphite electrode affected on its electrochemical characterization such as irreversible capacity loss, high rate cycling and cycle performance.
Date:
December 2, 2002
Creator:
Shim, Joongpyo & Striebel, Kathryn A.
Object Type:
Article
System:
The UNT Digital Library
Effects of clone, silvicultural, and miticide treatments on cottonwood leafcurl mite (Acari: Eriophyidae) damage in plantation Populus
Aculops lobuliferus (Keifer) is a little known pest of plantation Populus spp., which is capable of causing substantial damage. This is the first documented occurrence of A. lobuliferus in South Carolina. Previous anecdotal data indicated clonal variation in Populus susceptibility to A. lobuliferus damage. A damage rating scale was created to monitor mite damage in 2000-2001 in a short-rotation woody crop plantation; damage descriptions and seasonal phenology also were recorded. Foliar damage and terminal mortality were monitored on two Populus deltoides Bartr. clones, ST66 and S7C15, receiving one of three silvicultural treatments (irrigated, fertilized or both) or no treatment (control). In 2001, early season foliar damage ratings were significantly higher on clone S7C15; however, damage on clone ST66 was greater after miticide treatments later in the year. Terminal mortality did not differ between clones. Silvicultural treatments significantly affected foliar damage levels in both clones. Application of a commercially available miticide significantly reduced A. lobuliferus damage levels. This study demonstrates that A. lobuliferus damage levels can be influenced by Populus clone and silvicultural treatment. Foliar and terminal damage levels observed in this study indicate the potential for substantial economic impact of A. lobuliferus on plantation Populus. Although an effective control method …
Date:
December 2, 2002
Creator:
Coyle, David, R.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, December 2, 2002
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 2002
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History