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19,998 Matching Results
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Archaeological Investigations at Five Prehistoric Sites at Lewisville Lake, Denton County, Texas
This report describes the results of excavations performed by the Institute of Applied Sciences at the Lewisville Lake project, Denton County, Texas.
Date:
1998
Creator:
Ferring, C. Reid & Yates, Bonnie C.
Object Type:
Book
System:
The UNT Digital Library
Archer County News (Archer City, Tex.), No. 1, Ed. 1 Thursday, January 1, 1998
Weekly newspaper from Archer City, Texas that includes local, state and national news along with advertising.
Date:
January 1, 1998
Creator:
Lobpries, F. Mike
Object Type:
Newspaper
System:
The Portal to Texas History
Archivos de Laredo: Documentos Referentes a Los Indios
Transcription of materials in both Spanish and English from the Laredo Archives, held by St. Mary's University in San Antonio, Texas; the documents contain information related to the activities of American Indians in Texas and Mexico during the late 1700s and early 1800s. A topical index starts on 88.
Date:
1998
Creator:
Wood, Robert D.
Object Type:
Book
System:
The Portal to Texas History
Around the Bend, Volume 4, Number 1, Winter 1998
Quarterly newsletter discussing news and events related to the Corpus Christi Bay National Estuary Program, as well as research and information related to the bays, estuaries, and bayous in the Copano, Aransas, Corpus Christi, Nueces, Baffin and upper Laguna Madre bay systems.
Date:
1998-01~
Creator:
Corpus Christi Bay National Estuary Program
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Art Lies, Volume 18, Spring 1998
Journal containing essays, commentaries, and exhibition information regarding Texas artwork and other contemporary art issues.
Date:
1998
Creator:
Birringer, Johannes
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Art Lies, Volume 20, Fall 1998
Journal containing essays, commentaries, and exhibition information regarding Texas artwork and other contemporary art issues.
Date:
1998
Creator:
Watson, Randy
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Art Lies, Volume 21, Winter 1998-1999
Journal containing essays, commentaries, and exhibition information regarding Texas artwork and other contemporary art issues.
Date:
1998
Creator:
Gooden, Troy & Brown, David P.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Assessing microbiologically induced corrosion of waste package materials in the Yucca Mountain repository
The contribution of bacterial activities to corrosion of nuclear waste package materials must be determined to predict the adequacy of containment for a potential nuclear waste repository at Yucca Mountain (YM), NV. The program to evaluate potential microbially induced corrosion (MIC) of candidate waste container materials includes characterization of bacteria in the post-construction YM environment, determination of their required growth conditions and growth rates, quantitative assessment of the biochemical contribution to metal corrosion, and evaluation of overall MIC rates on candidate waste package materials.
Date:
January 1, 1998
Creator:
Horn, J. M., LLNL
Object Type:
Article
System:
The UNT Digital Library
Assessment of methods for hydrogen production using concentrated solar energy
The purpose of this work was to assess methods for hydrogen production using concentrated solar energy. The results of this work can be used to guide future work in the application of concentrated solar energy to hydrogen production. Specifically, the objectives were to: (1) determine the cost of hydrogen produced from methods that use concentrated solar thermal energy, (2) compare these costs to those of hydrogen produced by electrolysis using photovoltaics and wind energy as the electricity source. This project had the following scope of work: (1) perform cost analysis on ambient temperature electrolysis using the 10 MWe dish-Stirling and 200 MWe power tower technologies; for each technology, sue two cases for projected costs, years 2010 and 2020 the dish-Stirling system, years 2010 and 2020 for the power tower, (2) perform cost analysis on high temperature electrolysis using the 200 MWe power tower technology and projected costs for the year 2020, and (3) identify and describe the key technical issues for high temperature thermal dissociation and the thermochemical cycles.
Date:
January 1998
Creator:
Glatzmaier, G.; Blake, D. & Showalter, S.
Object Type:
Report
System:
The UNT Digital Library
Assessment of Strippable Coatings for Decontamination and Decommissioning
Strippable or temporary coatings were developed to assist in the decontamination of the Three Mile Island (TMI-2) reactor. These coatings have become a viable option during the decontamination and decommissioning (D and D) of both US Department of Energy (DOE) and commercial nuclear facilities to remove or fix loose contamination on both vertical and horizontal surfaces. A variety of strippable coatings are available to D and D professionals. However, these products exhibit a wide range of performance criteria and uses. The Hemispheric Center for Environmental Technology (HCET) at Florida International University (FIU) was commissioned to perform a 2-year investigation into strippable coatings. This investigation was divided into four parts: (1) identification of commercially available strippable coating products; (2) survey of D and D professionals to determine current uses of these coatings and performance criteria; (3) design and implementation of a non-radiological testing program to evaluate the physical properties of these coatings; and (4) design and implementation of a radiological testing program to determine decontamination factors and effects of exposure to ionizing radiation. Activities during fiscal year 1997 are described.
Date:
January 1, 1998
Creator:
Ebadian, M.A.
Object Type:
Report
System:
The UNT Digital Library
Assessment of the RELAP5 multi-dimensional component model using data from LOFT test L2-5
The capability of the RELAP5-3D computer code to perform multi-dimensional analysis of a pressurized water reactor (PWR) was assessed using data from the LOFT L2-5 experiment. The LOFT facility was a 50 MW PWR that was designed to simulate the response of a commercial PWR during a loss-of-coolant accident. Test L2-5 simulated a 200% double-ended cold leg break with an immediate primary coolant pump trip. A three-dimensional model of the LOFT reactor vessel was developed. Calculations of the LOFT L2-5 experiment were performed using the RELAP5-3D Version BF02 computer code. The calculated thermal-hydraulic responses of the LOFT primary and secondary coolant systems were generally in reasonable agreement with the test. The calculated results were also generally as good as or better than those obtained previously with RELAP/MOD3.
Date:
January 1, 1998
Creator:
Davis, C.B.
Object Type:
Report
System:
The UNT Digital Library
Atmospheric tests of trailing-edge aerodynamic devices
An experiment was conducted at the National Renewable Energy Laboratory`s (NREL`s) National Wind Technology Center (NWTC) using an instrumented horizontal-axis wind turbine that incorporated variable-span, trailing-edge aerodynamic brakes. The goal of the investigation was to directly compare results with (infinite-span) wind tunnel data and to provide information on how to account for device span effects during turbine design or analysis. Comprehensive measurements were used to define effective changes in the aerodynamic and hinge-moment coefficients, as a function of angle of attack and control deflection, for three device spans (7.5%, 15%, and 22.5%) and configurations (Spoiler-Flap, vented sileron, and unvented aileron). Differences in the lift and drag behavior are most pronounced near stall and for device spans of less than 15%. Drag performance is affected only minimally (about a 30% reduction from infinite-span) for 15% or larger span devices. Interestingly, aerodynamic controls with vents or openings appear most affected by span reductions and three-dimensional flow.
Date:
January 1, 1998
Creator:
Miller, L. S.; Huang, S. & Quandt, G. A.
Object Type:
Report
System:
The UNT Digital Library
Atom probe field ion microscopy of titanium aluminides
Titanium aluminides have a number of potential high temperature applications due to their good elevated-temperature mechanical properties, low density, and good creep and oxidation resistance. However, fabrication of commercial components of these materials has been impeded by their poor mechanical properties at ambient temperatures. Significant efforts with various degrees of success have been made to improve the mechanical properties of these TiAl alloys by doping them with a variety of different elements including B, C, Cr, Er, Fe, Mn, Mo, Ni, Nb, P, Si, Ta, V and W. One of the optimum analytical tools for investigating the effects of these additions on the microstructure is the atom probe field ion micro scope. However, relatively few studies of titanium aluminides, compared to some other intermetallic compounds, have performed by atom probe field ion microscopy. This lack of attention can be attributed to the brittle nature of the material, in-situ transformations that occur during the field ion microscopy and preferential evaporation problems that were encountered in some of the early studies. The atom probe field ion microscope used for the current experiments has a low base pressure ({approximately} 2 {times} 10{sup 9} Pa) and careful attention was paid to optimizing the experimental …
Date:
January 1, 1998
Creator:
Larson, D. J. & Miller, M. K.
Object Type:
Report
System:
The UNT Digital Library
An Audit Report on Limited Reviews of Management Controls at the University of Texas at Austin
Report of the Texas State Auditor's Office related to a high-level assessment of key management control systems within The University of Texas at Austin, conducted to identify opportunities for improvement and determine established strengths.
Date:
January 1998
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on Managed Health Care at The Texas Department of Criminal Justice
Report of the Texas State Auditor's Office related to the implementation of a managed health care system by the Texas Department of Criminal Justice in order to control increasing costs of providing health care to inmates, and opportunities for improvement of the management controls in the prison health care system.
Date:
January 1998
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on Management Controls at Prairie View A&M University
Report of the Texas State Auditor's Office related to several opportunities for Prairie View A&M University's (University) management to improve aspects of policy development and implementation; the management of personnel, revenues, and expenditures; and the accuracy and usefulness of data and performance information.
Date:
January 1998
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on Management Controls at the Texas Water Development Board
Report of the Texas State Auditor's Office related to whether the Texas Water Development Board had established appropriate controls over policies, information, performance, and resources, specifically considering whether the Board is making progress toward goals and objectives, safeguards its assets uses them efficiently, complies with applicable laws and regulations, and maintains and reports reliable data.
Date:
January 1998
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on Petroleum Violation Escrow Funds Contract Administration at the State Energy Conservation Office of the General Services Commission
Report of the Texas State Auditor's Office related to opportunities for the State Energy Conservation Office (Energy Office) of the General Services Commission to improve fiscal management of the LoanSTAR Revolving Loan Program to ensure that it meets statutory requirements, and to improve some of its contract administration practices.
Date:
January 1998
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on The Implementation of House Bill 2377 and the Conversion of State-Operated Community Services to Local Control
Report of the Texas State Auditor's Office related to evaluating plans for the House Bill 2377 pilot project, reviewing selected management controls at the community centers participating in the pilot, and evaluating the plans to convert the state-operated services to local control.
Date:
January 1998
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Axion overview and the U.S. RF cavity axion search
The axion, a hypothetical elementary particle, originally emerged from a solution to the strong CP problem in QCD. Later, axions were recognized as good dark matter candidates. Dark matter axions have only feeble couplings to matter and radiation, so their detection offers considerable challenge. Nonetheless, a new generation of exquisitely sensitive searches is underway. One such effort, in the United States, has already achieved sensitivity to plausible halo dark matter axion to photon couplings.
Date:
January 1, 1998
Creator:
Rosenberg, L. J. & Van Bibber, K. A.
Object Type:
Article
System:
The UNT Digital Library
B Physics at the Tevatron
The CDF and D0 experiments have collected large samples of b hadrons during the 1992-1996 p{bar p} collider run at the Fermilab Tevatron. We report the discovery of the B{sub c} meson in the semileptonic decay B{sub c} {yields} J/{psi}{ell}{nu}X and give updates on B{sup 0} - {bar B}{sup 0} mixing and B{sub s} lifetime results. Improved limits on the branching fractions of rare B decays are also shown.
Date:
January 1, 1998
Creator:
Erdmann, W.
Object Type:
Article
System:
The UNT Digital Library
B-physics results from D-Zero
A number of B-physics results from the D0 experiment at the Fermilab Tevatron Collider is reported. Measurements of b{anti b} production in p{anti p} interactions at {radical}s = 1800 GeV and 630 GeV are used to evaluate, for the first time with the same detector, the center-of-mass energy and rapidity dependence of b-quark production cross section. A measurement of the b{anti b} angular correlations using dimuon triggers is also presented. Preliminary results from these measurements are compared with the next-to-leading order QCD predictions. Finally, dimuon data samples are used to study P{sub T} and rapidity dependence of b-produced and direct charmonium production.
Date:
January 1, 1998
Creator:
Baarmand, M.M.
Object Type:
Article
System:
The UNT Digital Library
Bandgap renormalization: GaAs/AlGaAs quantum wells
Bandgap energy renormalization by many-body interactions has been studied in a series of n-type 8-nm-wide GaAs/AlGaAs single quantum wells using magnetoluminescence spectroscopy at 1.4K and for magnetic fields up to 30T. The 2D- carrier densities varied between 1 and 12 x 10(11) cm(-2). At the maximum 2D-carrier density, the bandgap energy difference between the doped and undoped samples was about 34 meV.
Date:
January 1, 1998
Creator:
Jones, E. D.; Blount, M.; Chow, W.; Hou, H.; Simmons, J. A.; Kim, Yongmin et al.
Object Type:
Article
System:
The UNT Digital Library
Baseline neutron logging measurements in the drift scale test
The Drift Scale Test (DST) is one of the thermal tests being conducted in the Exploratory Studies Facility (ESF). One of the objectives of the DST is to study the coupled thermal-mechanical- hydrological-chemical (TMHC) processes in the ESF at the repository horizon of the potential high-level nuclear waste repository in Yucca Mountain, Nevada. The objectives, the test design, and the test layouts of the DST are included in the test design report by CRWMS M&O Contractor LLNL. The configuration of the DST includes a declining Observation Drift driven mostly east and downward from main tunnel in the ESF, at about 2.827 km from the North portal. The downward slope of the Observation Drift (11.5 to 14.0 percent) ensures a minimum 10 m of middle nonlithophysal Topopah Spring Tuff as the overburden for the DST. The length of the Observation Drift is about 136 m. At the elevation of the DST crown (nominally 10 m below the upper extent of the middle nonlithophysal Topopah Spring Tuff) the Connecting Drift breaks out to the north from the Observation Drift, 136 m from the main tunnel of the ESF. The Connecting Drift extends approximately 40 m to the north from the Observation Drift. …
Date:
January 1, 1998
Creator:
Lin, W.; Carlson, R. & Neubaurer, D.
Object Type:
Report
System:
The UNT Digital Library