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Ensemble: 2000-04-22 - African Percussion Ensemble
An African percussion concert performed at the UNT College of Music WInspear Hall.
Date:
April 22, 2000
Creator:
African Percussion Ensemble
Object Type:
Sound
System:
The UNT Digital Library
Nuclear structure studies from prompt gamma-ray spectroscopy of fission fragments.
None
Date:
June 22, 2000
Creator:
Ahmad, I.
Object Type:
Article
System:
The UNT Digital Library
Photoconductive properties of GaAs{sub 1{minus}x}N{sub x} double heterostructures as a function of excitation wavelength
The ternary semiconductor GaAs{sub 1{minus}x}N{sub x} with 0 < x < 0.3 can be grown epitaxially on GaAs and has a very large bowing coefficient. The alloy bandgap can be reduced to about 1.0 eV with about a 3% nitrogen addition. In this work, the authors measured the internal spectral response and recombination lifetime of a number of alloys using the ultra-high frequency photoconductive decay (UHFPCD) method. The data shows that the photoconductive excitation spectra of the GaAs{sub 0.97}N{sub 0.03} alloy shows a gradual increase in response through the absorption edge near E{sub g}. This contrasts with most direct bandgap semiconductors that show a steep onset of photoresponse at E{sub g}. The recombination lifetimes frequently are much longer than expected from radiative recombination and often exceeded 1.0{mu}s. The data were analyzed in terms of a band model that includes large potential fluctuations in the conduction band due to the random distribution of nitrogen atoms in the alloy.
Date:
May 22, 2000
Creator:
Ahrenkiel, R. K.; Mascarenhas, A.; Johnston, S. W.; Zhang, Y.; Friedman, D. J. & Vernon, S. M.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2000-04-22 - UNT African Percussion Ensemble
Access:
Use of this item is restricted to the UNT Community
Concert presented at Winspear Hall at the Murchison Performing Arts Center.
Date:
April 22, 2000
Creator:
Alorwoyie, Gideon Foli
Object Type:
Sound
System:
The UNT Digital Library
Protocol for development of authorized release limits for concrete at U.S. Department of Energy sites
The purpose of this protocol is to assist US Department of Energy (DOE) sites in releasing concrete for reuse. Current regulations allow the sites to release surface-contaminated materials if their radioactivity falls below certain levels and to possibly release materials with volumetric contamination or higher levels of surface contamination on a case-by-case basis. In all cases, an ALARA (as low as reasonably achievable) analysis that evaluates the risks of releasing volumetrically contaminated concrete or concrete with higher levels of surface contamination is required as a basis for proposing and setting new release limits that allow for reuse of the concrete material. To evaluate the dose impacts of reusing radioactively contaminated material, the measured radiation levels (pCi/g or disintegrations per minute [dpm]/100 cm{sup 2}) must be converted to the estimated dose (mrem/yr) that would be received by affected individuals. The dose depends on the amounts and types of isotopes present and the time, distance, and method of exposure (e.g., inhalation or external exposure). For each disposition alternative, the protocol provides a systematic method to evaluate the impact of the dose on the affected individuals. The cost impacts of reusing concrete also need to be evaluated. They too depend on the disposition …
Date:
August 22, 2000
Creator:
Arnish, J.; Kamboj, S.; Chen, S. Y.; Parker, F. L.; Smith, A. M.; Meservey, R. H. et al.
Object Type:
Report
System:
The UNT Digital Library
PFP Commercial Grade Food Pack Cans for Plutonium Handling and Storage Critical Characteristics
This screening addresses the critical characteristics for food industry type cans and containers used for handling and storage of special nuclear materials at the Plutonium Finishing Plant (PFP). HNF-5460, Revision 0 specified a minimum tin plate of 0.50 Ib./base box. Since the food pack cans currently used and that have been tested have a listed tin plate of 0.20 lbs. per base box, Revision 1 reduced the tin plate to {ge} 0.20 Ib./base box (i.e., No. 20 tinned commercial steel or heavier). This revision lists Critical Characteristics for two (2) large filtered containers, and associated shielding over-packs. These new containers are called ''Nuclear Material Containers'' (NMCs). They are supplied in various sizes, which can be nested, one inside another. The PFP will use NMCs with volumes up to 8-quarts as needed to over-pack largely bulged containers.
Date:
August 22, 2000
Creator:
BONADIE, E.P.
Object Type:
Report
System:
The UNT Digital Library
Transversely Polarized L Production.
Transversely polarized {Lambda} production in hard scattering processes is discussed in terms of a leading twist T-odd fragmentation function which describes the fragmentation of an unpolarized quark into a transversely polarized {Lambda}. We focus on the properties of this function and its relevance for the RHIC and HERMES experiments.
Date:
May 22, 2000
Creator:
BORER, D.
Object Type:
Article
System:
The UNT Digital Library
FUEL COMPOSITION EFFECTS ON FUEL PROCESSOR DYNAMICS
None
Date:
September 22, 2000
Creator:
BORUP, R. L.; INBODY, M. A. & AL., ET.
Object Type:
Article
System:
The UNT Digital Library
Thermodynamic analysis of Thermophotovoltaic Efficiency and Power Density Tradeoffs
This report presents an assessment of the efficiency and power density limitations of thermophotovoltaic (TPV) energy conversion systems for both ideal (radiative-limited) and practical (defect-limited) systems. Thermodynamics is integrated into the unique process physics of TPV conversion, and used to define the intrinsic tradeoff between power density and efficiency. The results of the analysis reveal that the selection of diode bandgap sets a limit on achievable efficiency well below the traditional Carnot level. In addition it is shown that filter performance dominates diode performance in any practical TPV system and determines the optimum bandgap for a given radiator temperature. It is demonstrated that for a given radiator temperature, lower bandgap diodes enable both higher efficiency and power density when spectral control limitations are included. The goal of this work is to provide a better understanding of the basic system limitations that will enable successful long-term development of TPV energy conversion technology.
Date:
February 22, 2000
Creator:
Baldasara, P. F.; Reynolds, J. E.; Charache, G. W.; DePoy, D. M.; Ballinger, C. T.; Donovan, T. et al.
Object Type:
Report
System:
The UNT Digital Library
''Self-Smoothing of Laser Light in Plasmas''.
The modification of the optical characteristics of a laser beam by a plasma is a key issue in laser-plasma coupling. it is critical to understand how this takes place, if we are ever to understand the interaction processes in the plasma corona as well as the coupling at super-high intensities--as when laser pulses approach Petawatt intensities. Interpreting and understanding parametric instabilities in laser-produced plasmas has been a problem of increasing complexity. Improvements in diagnostic capabilities in experimental studies, as well as refinements in the modeling (using different numerical techniques), are showing a complex scenario: strong interplay among instabilities, modification of the plasma conditions caused by the instabilities, and modification to the initial distribution of laser intensity inside the plasma. Of particular interest are stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS), instabilities which have been studied extensively during the past 20 years, both theoretically and experimentally. Until now, most studies--mainly driven by requirements associated with inertial confinement fusion (ICF)--have concentrated on backscattering instabilities. The role of forward instabilities has not received much attention, despite having the potentials for strongly modifying the overall laser-plasma interaction region. The objective of this project is to study numerically the nonlinear enhancement of large-angle, …
Date:
February 22, 2000
Creator:
Baldis, H. A.; Rozmus, W.; Labaune, C.; Cohen, B. & Bergen, R.
Object Type:
Report
System:
The UNT Digital Library
The National Forest Roadless Area Initiative
None
Date:
August 22, 2000
Creator:
Baldwin, Pamela
Object Type:
Report
System:
The UNT Digital Library
News Bulletin (Castroville, Tex.), Vol. 42, No. 25, Ed. 1 Thursday, June 22, 2000
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 22, 2000
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Tank Waste Remediation System (TWRS) Financial Analysis for Phase 1 Privatization for the Tank Farm Contractor
The purpose of the Financial Analysis for Phase 1 Privatization for the Tank Farm Contractor is to provide a third-party quantitative and qualitative cost and schedule risk analysis of HNF-1946. The purpose of this Financial Analysis for Phase 1 Privatization for the Tank Farm Contractor (TFC) is to document the results of the risk-based financial analysis of HNF-1946, Programmatic Baseline Summary for Phase 1 Privatization f o r the Tank Farm Contractor (Diediker 2000). This analysis was performed to evaluate how well the proposed baseline meets the U. S. Department of Energy, Office of River Protection (ORP) Letter OO-MSO-009, ''Contract NO. DE-AC06-99RL14047--The US Department of Energy, Office of River Protection (ORP) Mission Planning Guidance for Fiscal Year (FY) 2002--Revision 1'' (Short 2000). The letter requires a confidence level in the baseline schedule that is consistent with the Phase 1A readiness-to-proceed (RTP) assessment conducted in fiscal year (FY) 1998. Because the success of the project depends not only on the budget but also on the schedule, this risk analysis addresses both components of the baseline.
Date:
April 22, 2000
Creator:
Basche, A. D.
Object Type:
Report
System:
The UNT Digital Library
Direct releases to the surface and associated complementary cumulative distribution functions in the 1996 performance assessment for the Waste Isolation Pilot Plant: Cuttings, cavings and spallings
The following topics related to the treatment of cuttings, cavings and spallings releases to the surface environment in the 1996 performance assessment for the Waste Isolation Pilot Plant (WIPP) are presented: (1) mathematical description of models. (2) uncertainty and sensitivity analysis results arising from subjective (i.e., epistemic) uncertainty for individual releases, (3) construction of complementary cumulative distribution functions (CCDFs) arising from stochastic (i.e., aleatory) uncertainty, and (4) uncertainty and sensitivity analysis results for CCDFs. The presented results indicate that direct releases due to cuttings, cavings and spallings do not constitute a serious threat to the effectiveness of the WIPP as a disposal facility for transuranic waste. Even when the effects of uncertain analysis inputs are taken into account, the CCDFs for cuttings, cavings and spallings releases fall substantially to the left of the boundary line specified in the US Environmental Protection Agency standard for the geologic disposal of radioactive waste (40 CFR 191, 40 CFR 194).
Date:
May 22, 2000
Creator:
Berglund, J. W.; Garner, J. W.; Helton, Jon Craig; Johnson, J. D.; Smith, L. N. & Anderson, R. P.
Object Type:
Article
System:
The UNT Digital Library
Thin film CuIn{sub 1{minus}x}Ga{sub x}Se-based solar cells prepared from solution-based precursors
The authors have fabricated high-efficiency thin-film CuIn{sub 1{minus}x}Ga{sub x}Se{sub 2} (CIGS)-based photovoltaic devices from solution-based electroplated (EP) and auto-plated (AP) precursors. As-deposited precursors are Cu-rich CIGS. Compositions were adjusted to CuIn{sub 1{minus}x}Ga{sub x}Se{sub 2} with additional In and Ga by physical vapor deposition (PVD) to the EP and AP precursor films. Auger analysis and grazing incident X-ray diffraction (GIXRD) were performed on devices prepared from EP and AP precursor films. The authors have also analyzed and compared EP, AP, and an PVD CIGS device by deep-level transient spectroscopy (DLTS).
Date:
May 22, 2000
Creator:
Bhattacharya, R. N.; Balcioglu, A.; Ramanathan, K. & Batchelor, W. K., Ahrenkiel, R. K.
Object Type:
Article
System:
The UNT Digital Library
Nonlinear Harmonics in the High-Gain Harmonic Generation (HGHG) Experiment.
None
Date:
August 22, 2000
Creator:
Biedron, S. G.; Freund, H. P.; Wang, X. & Yu, L. H.
Object Type:
Article
System:
The UNT Digital Library
Sample push out fixture
This invention generally relates to the remote removal of pelletized samples from cylindrical containment capsules. V-blocks are used to receive the samples and provide guidance to push out rods. Stainless steel liners fit into the v-channels on the v-blocks which permits them to be remotely removed and replaced or cleaned to prevent cross contamination between capsules and samples. A capsule holder securely holds the capsule while allowing manual up/down and in/out movement to align each sample hole with the v-blocks. Both end sections contain identical v-blocks; one that guides the drive out screw and rods or manual push out rods and the other to receive the samples as they are driven out of the capsule.
Date:
February 22, 2000
Creator:
Biernat, John L.
Object Type:
Patent
System:
The UNT Digital Library
Oral History Interview with Herman Billnitzer, October 22, 2000
Transcript of an oral interview with Herman Billnitzer. Mr Billnitzer was a Pharmacist Mate in the Navy and spent most of his time as a corpsman with the 1st Marine Division, landing on Guadalcanal in October 1942. He describes the conditions on Guadalcanal as well as the conditions of the sailors that were rescued from ships sunk in Iron Bottom Sound. Near the end of the year, the 1st Marine Division was relieved by the Army and went to Australia for about eight months. From there, they were shipped to New Guinea, Milne Bay, where they stayed for about three months. Then, they landed on New Britain. Billnitzer gives a gripping description of the front line fighting on New Britain including the counterattacks by the Japanese; very revealing of what went on there. After New Britain, he was shipped back to the base hospital at Cape Gloucester and then to Pavuvu (Russell Islands) before he came back to the States for rest and rehabilitation in 1944; after over 20 months in the South Pacific. Billnitzer was sent to the naval hospital at Corpus Christi and then to the west coast for training at San Bruno, California. He went to Sasebo, …
Date:
October 22, 2000
Creator:
Billnitzer, Herman
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Herman Billnitzer, October 22, 2000
Transcript of an oral interview with Herman Billnitzer. Mr Billnitzer was a Pharmacist Mate in the Navy and spent most of his time as a corpsman with the 1st Marine Division, landing on Guadalcanal in October 1942. He describes the conditions on Guadalcanal as well as the conditions of the sailors that were rescued from ships sunk in Iron Bottom Sound. Near the end of the year, the 1st Marine Division was relieved by the Army and went to Australia for about eight months. From there, they were shipped to New Guinea, Milne Bay, where they stayed for about three months. Then, they landed on New Britain. Billnitzer gives a gripping description of the front line fighting on New Britain including the counterattacks by the Japanese; very revealing of what went on there. After New Britain, he was shipped back to the base hospital at Cape Gloucester and then to Pavuvu (Russell Islands) before he came back to the States for rest and rehabilitation in 1944; after over 20 months in the South Pacific. Billnitzer was sent to the naval hospital at Corpus Christi and then to the west coast for training at San Bruno, California. He went to Sasebo, …
Date:
October 22, 2000
Creator:
Billnitzer, Herman
Object Type:
Text
System:
The Portal to Texas History
Medical Missions: Demostrating Compassion of Jesus
Lecture given Tuesday, February 22, 2000, 3:30 PM at Abilene Christian University: "Representatives from several organizations involved with medical missions will discuss their services, e.g., International Health Care Foundation, Health Talents International, et al. Learn about the opportunities."
Date:
February 22, 2000
Creator:
Bingham, Janice
Object Type:
Sound
System:
The Portal to Texas History
The Harper Herald (Harper, Tex.), Vol. 70, No. 8, Ed. 1 Tuesday, February 22, 2000
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
February 22, 2000
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
Appropriations for FY2001: An Overview
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 broad overview of all appropriations activity and a guide to the CRS Appropriation Product Series that provides analytical perspectives on the 13 annual FY2001 appropriations bills.
Date:
September 22, 2000
Creator:
Bley, Mary Frances
Object Type:
Report
System:
The UNT Digital Library
Churches of Christ from the Viewpoint of Independent Christian Churches
Lecture given Tuesday, February 22, 2000, 8:30 AM at Abilene Christian University
Date:
February 22, 2000
Creator:
Blowers, Paul
Object Type:
Sound
System:
The Portal to Texas History
An Insider Look at Strengths/ Challenges of Independent Christian Churches
Lecture given Tuesday, February 22, 2000, 11:00 AM at Abilene Christian University
Date:
February 22, 2000
Creator:
Blowers, Paul
Object Type:
Sound
System:
The Portal to Texas History