Partner
UNT Libraries Government Documents Department
956
Oklahoma Historical Society
182
UNT Libraries Special Collections
101
Sterling Municipal Library
27
UNT Libraries
20
Carl Albert Congressional Research and Studies Center
18
Alvin Community College
13
Rice University Woodson Research Center
12
UNT Music Library
12
San Antonio Public Library
11
72 More
Collection
Office of Scientific & Technical Information Technical Reports
684
Texas Digital Newspaper Program
317
Oklahoma Digital Newspaper Program
165
Tocker Foundation Grant
155
Government Accountability Office Reports
150
Congressional Research Service Reports
60
Jim Argo Collection
43
KXAS-NBC 5 News Collection
36
Chickasha Newspaper Collection
28
LGBT Collections
28
125 More
Degree Department
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
Language
1,653 Matching Results
Results open in a new window/tab.
A UNIVERSAL LAW FOR TAILS OF DENSITY PDF'S IN MULTI-DIMENSIONAL BURGERS TURBULENCE
None
Date:
March 1, 2000
Creator:
Bec, J. & Frisch, U.
Object Type:
Article
System:
The UNT Digital Library
Use of EBSD data in mesoscale numerical analyses
Experimentation, theory, and modeling have all played vital roles in defining what is known about microstructural evolution and the effects of microstructure on material properties. Recently, technology has become an enabling factor, allowing significant advances to be made on several fronts. Experimental evidence of crystallographic slip and the basic theory of crystal plasticity were established in the early 20th century, and the theory and models evolved incrementally over the next 60 years. During this time, modeling was primarily concerned with the average response of polycrystalline aggregates. While some detailed finite element modeling (FEM) with crystal plasticity constitutive relations was performed in the early 1980's, such simulations over taxed the capacity of the available computer hardware. Advances in computer capabilities led to a flurry of activity in finite element modeling in the next 10 years, thus increasing understanding of lattice orientation evolution and generating detailed predictions of spatial orientation distributions that could not be readily validated with existing experimental characterization methods. Significant advancements in material characterization, particularly automated electron backscatter diffraction (EBSD), have made it possible to conduct detailed validation studies of the FEM predictions. The data collected are extensive, and many questions about the evolution of microstructure and its role …
Date:
March 30, 2000
Creator:
Becker, R & Wiland, H
Object Type:
Article
System:
The UNT Digital Library
Defect diffusion during annealing of low-energy ion-implanted silicon
We present a new approach for investigating the kinetics of defect migration during annealing of low-energy, ion-implanted silicon, employing a combination of computer simulations and atomic-resolution tunneling microscopy. Using atomically-clean Si(111)-7x7 as a sink for bulk point defects created by 5 keV Xe and Ar irradiation, we observe distinct, temperature-dependent surface arrival rates for vacancies and interstitials. A combination of simulation tools provides a detailed description of the processes that underly the observed temperature-dependence of defect segregation, and the predictions of the simulations agree closely with the experimental observations.
Date:
March 8, 2000
Creator:
Bedrossian, P J; Caturla, M-J & Diaz de la Rubia, T
Object Type:
Article
System:
The UNT Digital Library
Laboratory Data for X-Ray Astronomy
Laboratory facilities have made great strides in producing large sets of reliable data for X-ray astronomy, which include ionization and recombination cross sections needed for charge balance calculations as well as the atomic data needed for interpreting X-ray line formation. We discuss data from the new generation sources and pay special attention to the LLNL electron beam ion trap experiment, which is unique in it's ability to provide direct laboratory access to spectral data under precisely controlled conditions that simulate those found in many astrophysical plasmas. Examples of spectral data obtained in the 1-160 A wavelength range are given illustrating the type of laboratory X-ray data produced in support of such missions as Chandra, XMM, ASCA and EUVE.
Date:
March 2, 2000
Creator:
Beiersdorfer, P.; Brown, G.V.; Chen, H.; Gu, M.F.; Kahn, S.M.; Lepson, J.K. et al.
Object Type:
Article
System:
The UNT Digital Library
Communicating A Controversial and Complex Project to the Public: Yucca Mountain Tours - Real and Virtual Communication
Since 1983, under the Nuclear Waste Policy Act of 1982, as amended (42 U.S.C. 10101 et seq.), the U.S. Department of Energy (the Department) has been investigating a site at Yucca Mountain, Nevada, to determine whether it is suitable for development as the nation's first repository for permanent geologic disposal of spent nuclear fuel and high-level radioactive waste. By far, the largest quantity of waste destined for geologic disposal is spent nuclear fuel from 118 commercial nuclear power reactors at 72 power plant sites and 1 commercial storage site across the United States. Currently, 104 of these reactors are still in operation and generate about 20 percent of the country's electricity. Under standard contracts that DOE executed with the utilities, DOE is to accept spent nuclear fuel from the utilities for disposal. Until that happens, the utilities must safely store their spent nuclear fuel in compliance with Nuclear Regulatory Commission regulations. As of December 1998, commercial spent nuclear fuel containing approximately 38,500 metric tons of heavy metal (MTHM) was stored in 33 states. The balance of the waste destined for geologic disposal in a repository is Department-owned spent nuclear fuel and high-level radioactive waste. The Department's spent nuclear fuel includes …
Date:
March 1, 2000
Creator:
Benson, A. B.; Nelson, P. V. & d'Ouville, M.
Object Type:
Report
System:
The UNT Digital Library
Top spin and experimental tests
The authors examine pair mass dependence near threshold as a means to measure the spin of the top quark in hadron collisions, and they discuss the possibility that a top quark signal could be hidden among the top events.
Date:
March 21, 2000
Creator:
Berger, E. L. & Tait, T. M. P.
Object Type:
Article
System:
The UNT Digital Library
Application of Integrated Reservoir Management and Reservoir Characterization
Reservoir performance and characterization are vital parameters during the development phase of a project. Infill drilling of wells on a uniform spacing, without regard to characterization does not optimize development because it fails to account for the complex nature of reservoir heterogeneities present in many low permeability reservoirs, especially carbonate reservoirs. These reservoirs are typically characterized by: (1) large, discontinuous pay intervals; (2) vertical and lateral changes in reservoir properties; (3) low reservoir energy; (4) high residual oil saturation; and (5) low recovery efficiency. The operational problems they encounter in these types of reservoirs include: (1) poor or inadequate completions and stimulations; (2) early water breakthrough; (3) poor reservoir sweep efficiency in contacting oil throughout the reservoir as well as in the nearby well regions; (4) channeling of injected fluids due to preferential fracturing caused by excessive injection rates; and (5) limited data availability and poor data quality. Infill drilling operations only need target areas of the reservoir which will be economically successful. If the most productive areas of a reservoir can be accurately identified by combining the results of geological, petrophysical, reservoir performance, and pressure transient analyses, then this ''integrated'' approach can be used to optimize reservoir performance during …
Date:
March 1, 2000
Creator:
Bergeron, Jack; Blasingame, Tom; Doublet, Louis; Kelkar, Mohan; Freeman, George; Callard, Jeff et al.
Object Type:
Report
System:
The UNT Digital Library
Application of integrated reservoir management and reservoir characterization to optimize infill drilling, Class II
The major purpose of this project was to demonstrate the use of cost effective reservoir characterization and management tools that will be helpful to both independent and major operators for the optimal development of heterogeneous, low permeability carbonate reservoirs such as the North Robertson (Clearfork) Unit.
Date:
March 16, 2000
Creator:
Bergeron, Jack; Blasingame, Tom; Doublet, Louis; Kelkar, Mohan; Freeman, George; Callard, Jeff et al.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED DIRECT LIQUEFACTION CONCEPTS FOR PETC GENERIC UNITS
The results of Laboratory and Bench-Scale experiments and supporting technical and economic assessments conducted under DOE Contract No. DE-AC22-91PC91040 is reported for the period April 1, 1998 to June 30, 1998. This contract is with the University of kentucky Research Foundation, which supports work with the University of Kentucky Center for Applied Energy Researc, CONSOL, Inc., LDP Associates, and Hydrocarbon Technologies, Inc. This work involves the introduction into the basic two-stage liquefaction process several novel concepts, which include dispersed lower-cost catalysts, coal cleaning by oil agglomeration, and distillate hydrotreating and dewaxing.
Date:
March 1, 2000
Creator:
Berkovich, Adam J.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED DIRECT LIQUEFACTION CONCEPTS FOR PETC GENERIC UNITS
The results of Laboratory and Bench-Scale experiments and supporting technical and economic assessments conducted under DOE Contract No. DE-ACC22-91PC91040 is reported for the period January 1, 1999 to March 31, 2000. This work involves the introduction into the basic two-stage liquefaction process several novel concepts, which include dispersed lower-cost catalysts, coal cleaning by oil agglomeration, and distillate hydrotreating and dewaxing. This project has been modified to include an investigation into the production of value added materials from coal using liquefaction based technologies.
Date:
March 1, 2000
Creator:
Berkovich, Adam J.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED DIRECT LIQUEFACTION CONCEPTS FOR PETC GENERIC UNITS
The results of Laboratory and Bench-Scale experiments and supporting technical and economic assessments conducted under DOE Contract No. DE-AC22-91PC91040 is reported for the period April 1, 1998 to June 30, 1998. This contract is with the University of kentucky Research Foundation, which supports work with the University of Kentucky Center for Applied Energy Researc, CONSOL, Inc., LDP Associates, and Hydrocarbon Technologies, Inc. This work involves the introduction into the basic two-stage liquefaction process several novel concepts, which include dispersed lower-cost catalysts, coal cleaning by oil agglomeration, and distillate hydrotreating and dewaxing.
Date:
March 1, 2000
Creator:
Berkovich, Adam J.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED DIRECT LIQUEFACTION CONCEPTS FOR PETC GENERIC UNITS
The results of Laboratory and Bench-Scale experiments and supporting technical and economic assessments conducted under DOE Contract No. DE-AC22-91PC91040 is reported for the period April 1, 1998 to June 30, 1998. This contract is with the University of kentucky Research Foundation, which supports work with the University of Kentucky Center for Applied Energy Researc, CONSOL, Inc., LDP Associates, and Hydrocarbon Technologies, Inc. This work involves the introduction into the basic two-stage liquefaction process several novel concepts, which include dispersed lower-cost catalysts, coal cleaning by oil agglomeration, and distillate hydrotreating and dewaxing.
Date:
March 1, 2000
Creator:
Berkovich, Adam J.
Object Type:
Report
System:
The UNT Digital Library
Development of the 2-MV injector for HIF
The 2-MV Injector consists of a 17-cm-diameter surface ionization source, an extraction diode, and an electrostatic quadrupole (ESQ) accelerator, with maximum current of 0.8 A of potassium beam at 2 MeV. Previous performance of the Injector produced a beam with adequate current and emittance but with a hollow profile at the end of the ESQ section. We have examined the profile of the beam as it leaves the diode. The measured nonuniform beam density distribution qualitatively agrees with EGUN simulation. Implications for emittance growth in the post acceleration and transport phase will be investigated.
Date:
March 17, 2000
Creator:
Bieniosek, F. M.; Kwan, J. W.; Henestroza, E. & Kim, C.
Object Type:
Article
System:
The UNT Digital Library
The Harper Herald (Harper, Tex.), Vol. 70, No. 9, Ed. 1 Tuesday, March 7, 2000
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
March 7, 2000
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
The Harper Herald (Harper, Tex.), Vol. 70, No. 12, Ed. 1 Tuesday, March 21, 2000
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
March 21, 2000
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
The Harper Herald (Harper, Tex.), Vol. 70, No. 13, Ed. 1 Tuesday, March 28, 2000
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
March 28, 2000
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
Doctoral Recital: 2000-03-27 – Gabriel Bita, piano
Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
March 27, 2000
Creator:
Bita, Gabriel
Object Type:
Sound
System:
The UNT Digital Library
Recent plant studies using Victoria 2.0
VICTORIA 2.0 is a mechanistic computer code designed to analyze fission product behavior within the reactor coolant system (RCS) during a severe nuclear reactor accident. It provides detailed predictions of the release of radioactive and nonradioactive materials from the reactor core and transport and deposition of these materials within the RCS and secondary circuits. These predictions account for the chemical and aerosol processes that affect radionuclide behavior. VICTORIA 2.0 was released in early 1999; a new version VICTORIA 2.1, is now under development. The largest improvements in VICTORIA 2.1 are connected with the thermochemical database, which is being revised and expanded following the recommendations of a peer review. Three risk-significant severe accident sequences have recently been investigated using the VICTORIA 2.0 code. The focus here is on how various chemistry options affect the predictions. Additionally, the VICTORIA predictions are compared with ones made using the MELCOR code. The three sequences are a station blackout in a GE BWR and steam generator tube rupture (SGTR) and pump-seal LOCA sequences in a 3-loop Westinghouse PWR. These sequences cover a range of system pressures, from fully depressurized to full system pressure. The chief results of this study are the fission product fractions that …
Date:
March 8, 2000
Creator:
Bixler, Nathan E. & Gasser, Ronald D.
Object Type:
Article
System:
The UNT Digital Library
Relocation impacts of an H-Separations coil and tube failure
The relocation impacts of an accidental release, scenario 1-RD-2.35, are evaluated for H-Separations. The extent of the area potentially contaminated to a level that would result in doses exceeding the relocation protective action guide (PAG) is calculated. The maximum calculated distance downwind from the accident at which the relocation PAG is exceeded is also determined. The consequences of the release are evaluated using the HOTSPOT model and an EXCEL spreadsheet.
Date:
March 6, 2000
Creator:
Blanchard, A.
Object Type:
Report
System:
The UNT Digital Library
DOSAR/CalLab Operations Manual
The Life Sciences Division (LSD) of Oak Ridge National Laboratory (ORNL) has a long record of radiation dosimetry research, primarily using the Health Physics Research Reactor (HPRR) and the Dosimetry Applications Research (DOSAR) Program Calibration Laboratory (CalLab), referred to formerly as the Radiation Calibration Laboratory. These facilities have been used by a broad segment of the research community to perform a variety of experiments in areas including, but not limited to, radiobiology, radiation dosimeter and instrumentation development and calibration, and the testing of materials in a variety of radiation environments.
Date:
March 1, 2000
Creator:
Bogard, J.S.
Object Type:
Report
System:
The UNT Digital Library
Partial Acceptance for Beneficial Use (ABU) for the Type 4 In Situ Vapor Sampler (ISVS) Carts
This document provides the ''Partial'' Acceptance for Beneficial Use (ABU), for the Type 4 in-situ vapor sampler system (ISVS). This document is generated to support the completion of equipment modifications and engineering documentation for the ISVS system that is used for sampling gaseous vapors in the Hanford single shell radioactive waste storage tanks. The ABU is used to document the items required for transferring the ISVS system to operations for field use. This document is generated following Characterization Engineering Desk Instruction DI-CE-004-001.
Date:
March 21, 2000
Creator:
Boger, R. M.
Object Type:
Report
System:
The UNT Digital Library
Specific PVMaT R and D in CdTe product manufacturing: Phase 1 annual report, 5 May 1998--4 May 1999
This report documents the work performed by First Solar, LLC, during the first year of this Photovoltaic Manufacturing Technology (PVMaT) subcontract. The following milestones were successfully completed: (1) Initiate lamination development program by interviewing key suppliers and experts such as STR, Inc., ARRI, and automotive glass manufacturers; (2) Complete process specification for high-throughput laminator; (3) Initiate contact with module testing laboratory and complete preliminary module design review; (4) Complete review and survey of current environmental, health and safety (EHS) programs; (5) Complete design specifications for the high-throughput laminator; (6) Complete preliminary testing of modules; (7) Establish Qualification Testing Schedule; (8) Develop plans for critical areas of EHS improvement with the assistance of industry experts such as OSHA On-Site Consultation; (9) Begin de-bug of high-throughput laminator; (10) Initiate qualification testing on First Solar's standard modules; (11) Initiate EHS improvement projects; (12) Complete prove-in of high-throughput laminator at a rate of 30 modules per hour; (13) Complete report on lamination rates, yields, and reductions in labor and equipment costs; (14) Complete qualification testing on First Solar's standard module for IEEE 1262 and UL 1703; and (15) Complete implementation of critical EHS improvements.
Date:
March 1, 2000
Creator:
Bohland, J.; Kormanyos, K.; Faykosh, G.; Champion, V.; Cox, S.; McCarthur, M. et al.
Object Type:
Report
System:
The UNT Digital Library
C-17 Cargo Aircraft Program
The C-17 Globemaster III is a long-range cargo/transport aircraft operated by the U.S. Air Force since 1993. Congress approved development of the aircraft in the late 1970s, when it was recognized that the Air Force did not have enough airlift capability. In 1981, the McDonnell Douglas C-17 emerged as winner of a competition with Boeing and Lockheed to develop a next-generation aircraft to replace C-130s and C-141s.
Date:
March 20, 2000
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
F-22 Aircraft Program
This report discusses the background information, analysis and the recent developments in the F-22 Aircraft Program. The F-22 program raises questions about its cost and the need for this aircraft, the capabilities it would have, and the number of these planes needed to meet military requirements. The F-22 has had strong congressional support, although some have criticized the program on grounds of cost, requirements, and coordination with other tactical aircraft programs. Deletion of procurement funds in the FY2000 defense appropriation bill passed by the House made the future of the program a major issue for House and Senate conferees in 1999.
Date:
March 21, 2000
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library