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1,807 Matching Results
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Bridging the Gap Between Speech Production and Speech Recognition
None
Date:
February 1, 2000
Creator:
Hogden, J. E. & Valdez, P. F.
Object Type:
Article
System:
The UNT Digital Library
Budget Issues: Effective Oversight and Budget Discipline Are Essential--Even in a Time of Surplus
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed selected performance challenges within federal agencies and programs and possible changes to congressional oversight models to help address such problems, focusing on: (1) the federal services that could be better provided by the private sector; (2) the federal subsidies to individuals, business, or states and local governments are no longer needed or are poorly targeted; (3) the overlapping or fragmented programs that could be consolidated or better coordinated; (4) the federal facilities or locations that are outmoded, ineffective, or excess to requirement; and (5) what areas major federal capital investments could be more cost effective in."
Date:
February 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Bursting frequency prediction in turbulent boundary layers
The frequencies of the bursting events associated with the streamwise coherent structures of spatially developing incompressible turbulent boundary layers were predicted using global numerical solution of the Orr-Sommerfeld and the vertical vorticity equations of hydrodynamic stability problems. The structures were modeled as wavelike disturbances associated with the turbulent mean flow. The global method developed here involves the use of second and fourth order accurate finite difference formula for the differential equations as well as the boundary conditions. An automated prediction tool, BURFIT, was developed. The predicted resonance frequencies were found to agree very well with previous results using a local shooting technique and measured data.
Date:
February 1, 2000
Creator:
Liou, William W. & Fang, Yichung
Object Type:
Report
System:
The UNT Digital Library
Cat's Claw (Archer City, Tex.), Vol. 54, No. 4, Ed. 1 Tuesday, February 1, 2000
Monthly student newspaper from Archer City High School in Archer City, Texas that includes news and information of interest to students along with advertising.
Date:
February 1, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Characterization of the Li(Si)/CoS(2) couple for a high-voltage, high-power thermal battery
In order to determined the capabilities of a thermal battery with high-voltage and high-power requirements, a detailed characterization of the candidate LiSi/LiCl-LiBr-LiF/CoS{sub 2} electrochemical couple was conducted. The rate capability of this system was investigated using 0.75 inch-dia. and 1.25 inch-dia. single and multiple cells under isothermal conditions, where the cells were regularly pulsed at increasingly higher currents. Limitations of the electronic loads and power supplies necessitated using batteries to obtain the desired maximum current densities possible for this system. Both 1.25 inch-dia. and 3 inch-dia. stacks were used with the number of cells ranging from 5 to 20. Initial tests involved 1.25 inch-dia. cells, where current densities in excess of 15 A/cm{sup 2} (>200 W/cm{sup 2}) were attained with 20-cell batteries during 1-s pulses. In subsequent follow-up tests with 3 inch-dia., 10-cell batteries, ten 400-A 1-s pulses were delivered over an operating period often minutes. These tests formed the foundation for subsequent full-sized battery tests with 125 cells with this chemistry.
Date:
February 1, 2000
Creator:
GUIDOTTI,RONALD A. & REINHARDT,FREDERICK W.
Object Type:
Report
System:
The UNT Digital Library
Characterization Report Building A-1 at the U.S. Department of Energy Nevada Operations Office North Las Vegas Facility
None
Date:
February 1, 2000
Creator:
Shotton, M. D.
Object Type:
Report
System:
The UNT Digital Library
Charge separation technique for metal-oxide-silicon capacitors in the presence of hydrogen deactivated dopants
An improved charge separation technique for metal-oxide-silicon (MOS) capacitors is presented which accounts for the deactivation of substrate dopants by hydrogen at elevated irradiation temperatures or small irradiation biases. Using high-frequency capacitance-voltage (C-V) measurements, radiation-induced inversion voltage shifts are separated into components due to oxide trapped charge, interface traps and deactivated dopants, where the latter is computed from a reduction in Si capacitance. In the limit of no radiation-induced dopant deactivation, this approach reduces to the standard midgap charge separation technique used widely for the analysis of room-temperature irradiations. The technique is demonstrated on a p-type MOS capacitor irradiated with {sup 60}Co {gamma}-rays at 100 C and zero bias, where the dopant deactivation is significant.
Date:
February 1, 2000
Creator:
WITCZAK,STEVEN C.; WINOKUR,PETER S.; LACOE,RONALD C. & MAYER,DONALD C.
Object Type:
Article
System:
The UNT Digital Library
[Charting Educational Achievements at Houston Community College System]
A comprehensive document detailing the academic journey and accomplishments of an individual at the Houston Community College System.
Date:
February 1, 2000
Creator:
unknown
Object Type:
Image
System:
The UNT Digital Library
Chemical reactions in TEOS/ozone chemical vapor deposition[TetraEthylOrtho Silicate]
A reaction mechanism for TEOS/O{sub 3} CVD in a SVG/WJ atmospheric pressure furnace belt reactor has been developed and calibrated with experimental deposition rate data. One-dimensional simulations using this mechanism successfully reproduce the trends observed in a set of 31 experimental runs in a WJ-TEOS999 reactor. Two-dimensional simulations using this mechanism successfully reproduce the average deposition rates for 3 different experimental conditions in a WJ-1500TF reactor, although the deposition profiles predicted by the model are flatter than the experimental static prints.
Date:
February 1, 2000
Creator:
HO,PAULINE
Object Type:
Report
System:
The UNT Digital Library
Chiral invariant phase space event generator
The CHIPS model and its first implementation within the GEANT4 simulation software package are considered. Hadron production in the process of nucleon-antinucleon annihilation is used as the basic example showing the structure of the model and corresponding software modeling algorithms. Model calculations of multiplicities and spectra of secondary hadrons in the annihilation process are compared with experimental data.
Date:
February 1, 2000
Creator:
Degtyarenko, P. V.; Kossov, M. V. & Wellisch, H. P.
Object Type:
Article
System:
The UNT Digital Library
Closure Report for Housekeeping Category Corrective Action Unit 343: Areas 1, 3, & 4 Housekeeping Sites, Nevada Test Site, Nevada
None
Date:
February 1, 2000
Creator:
Fitzmaurice, T. M.
Object Type:
Report
System:
The UNT Digital Library
Comments on frictional cooling and the zero energy options for cooling intense muon beams
It is shown that the proposed frictional cooling method is not directly applicable to intense ({approximately} 10{sup 12}) muon bunches, mostly due to space charge constraints. Other difficulties stem from the fact that the initial emittance must be quite small, compared to the nominal muon collider emittance. Excessive heat due to energy deposition in the foils, from the primary muon beam or from secondary electrons could also destroy the thin foils used as moderator. Other zero energy schemes are considered, separately for {mu}{sup {minus}} and {mu}{sup +}. All of them lead the authors to the study of exotic electrons-ions-muons plasma.
Date:
February 1, 2000
Creator:
Lebrun, P.
Object Type:
Article
System:
The UNT Digital Library
Commercialization of the Conversion of Bagasse to Ethanol. Summary quarterly report for the period January-September 1999
These studies were intended to further refine sugar yield parameters which effect sugar yield such as feedstock particle size, debris, acid soak time, temperature, dewatering, and pretreatment conditions (such as temperature, reaction time, percentage solids concentration, acid concentration), liquid-solids separation, and detoxification parameters (such as time temperature and mixing of detoxification ingredients). Validate and refine parameters, which affect ethanol yield such as detoxification conditions mentioned above, and to fermenter conditions such as temperature, pH adjustment, aeration, nutrients, and charging sequence. Materials of construction will be evaluated also. Evaluate stillage to determine clarification process and suitability for recycle; evaluate lignocellulosic cake for thermal energy recovery to produce heat and electricity for the process; and Support Studies at UF - Toxin Amelioration and Fermentation; TVA work will provide pre-hydroylsates for the evaluation of BCI proprietary methods of toxin amelioration. Pre-hydrolysates from batch studies will allow the determination of the range of allowable hydrolyze conditions that can be used to produce a fermentable sugar stream. This information is essential to guide selection of process parameters for refinement and validation in the continuous pretreatment reactor, and for overall process design. Additional work will be conducted at UFRFI to develop improved strains that are resistant …
Date:
February 1, 2000
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
COMPARISON OF SIGNATURE PATTERN ANALYSIS METHODS IN MOLECULAR EPIDEMIOLOGY
None
Date:
February 1, 2000
Creator:
Burr, T.; Charlton, W. & Stanbro, W.
Object Type:
Article
System:
The UNT Digital Library
COMPARISONS OF CALCULATED AND MEASURED 241AM AND 243AM CONCENTRATIONS IN PWR AND VVER SPENT FUEL
None
Date:
February 1, 2000
Creator:
CHARLTON, W. S.; STANBRO, W. D. & PERRY, R. T.
Object Type:
Article
System:
The UNT Digital Library
COMPONENT AND PROCESSES THAT ENABLED LOS ALAMOS NATIONAL LABORATORY TO SHIP TRANSURANIC WASTE TO WIPP OR WHAT IT TOOK TO SMOOTH THE FINAL SPEED BUMPS ON THE ROAD TO WIPP
None
Date:
February 1, 2000
Creator:
YEAMANS, D. R.; KOSIEWICZ, S. T. & AL, ET
Object Type:
Article
System:
The UNT Digital Library
Comprehensive testing to measure the response of fluorocarbon rubber (FKM) to Hanford tank waste simulant
This report presents the findings of the Chemical Compatibility Program developed to evaluate plastic packaging components that may be incorporated in packaging mixed-waste forms for transportation. Consistent with the methodology outlined in this report, the authors performed the second phase of this experimental program to determine the effects of simulant Hanford tank mixed wastes on packaging seal materials. That effort involved the comprehensive testing of five plastic liner materials in an aqueous mixed-waste simulant. The testing protocol involved exposing the materials to {approximately}143, 286, 571, and 3,670 Krad of gamma radiation and was followed by 7-, 14-, 28-, 180-day exposures to the waste simulant at 18, 50, and 60 C. Fluorocarbon (FKM) rubber samples subjected to the same protocol were then evaluated by measuring seven material properties: specific gravity, dimensional changes, mass changes, hardness, compression set, vapor transport rates, and tensile properties. From the analyses, they determined that FKM rubber is not a good seal material to withstand aqueous mixed wastes having similar composition to the one used in this study. They have determined that FKM rubber has limited chemical durability after exposure to gamma radiation followed by exposure to the Hanford tank simulant mixed waste at elevated temperatures above …
Date:
February 1, 2000
Creator:
Nigrey, Paul J. & Bolton , Dennis L.
Object Type:
Report
System:
The UNT Digital Library
Computer control raises welding from art to science: Inventions & Innovations success story
Fact sheet written for the Inventions and Innovation Program about a new welding control system that provides precise, effective welds and documents weld integrity.
Date:
February 1, 2000
Creator:
unknown
Object Type:
Book
System:
The UNT Digital Library
A CONCEPTUAL AND CALCULATION MODEL FOR GAS FORMATION FROM IMPURE CALCINED PLUTONIUM OXIDES
None
Date:
February 1, 2000
Creator:
Lyman, J. & Eller, P.
Object Type:
Article
System:
The UNT Digital Library
Consumer Price Index: Update of Boskin Commission's Estimate of Bias
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the Advisory Commission to Study the Consumer Price Index's (CPI) updated estimate of CPI bias, focusing on the: (1) methodological changes the Bureau of Labor Statistics (BLS) made to the CPI since December 1996, when the Advisory Commission (also referred to as the Boskin Commission) issued its final report; and (2) opinions of the five former Boskin Commission members on how much of the bias in the CPI that the Commission estimated in its December 1996 report remains after recent methodological changes to the CPI."
Date:
February 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Continuous casting/inside rolling of hollow rounds: Steel Project fact sheet
Fact sheet written for the Inventions and Innovation Program about a new process for casting hollow steel rounds that saves energy and costs.
Date:
February 1, 2000
Creator:
National Renewable Energy Laboratory (U.S.)
Object Type:
Book
System:
The UNT Digital Library
Continuous-flow stirred-tank reactor 20-L demonstration test: Final report
One of the proposed methods of removing the cesium, strontium, and transuranics from the radioactive waste storage tanks at Savannah River is the small-tank tetraphenylborate (TPB) precipitation process. A two-reactor-in-series (15-L working volume each) continuous-flow stirred-tank reactor (CSTR) system was designed, constructed, and installed in a hot cell to test the Savannah River process. The system also includes two cross-flow filtration systems to concentrate and wash the slurry produced in the process, which contains the bulk of radioactivity from the supernatant processed through the system. Installation, operational readiness reviews, and system preparation and testing were completed. The first test using the filtration systems, two CSTRs, and the slurry concentration system was conducted over a 61-h period with design removal of Cs, Sr, and U achieved. With the successful completion of Test 1a, the following tests, 1b and 1c, were not required.
Date:
February 1, 2000
Creator:
Lee, D. D. & Collins, J. L.
Object Type:
Report
System:
The UNT Digital Library
Core Financial System Requirements: Checklist for Reviewing Systems Under the Federal Financial Management Improvement Act (Superseded by GAO-05-225G)
Guidance issued by the General Accounting Office with an abstract that begins "This publication has been superseded by GAO-05-225G, Core Financial System Requirements: Checklist for Reviewing Systems under the Federal Financial Management Improvement Act, February 2005. GAO published a guide to assist agencies and internal auditors in maintaining their financial management systems in compliance with the Federal Financial Management Improvement Act of 1996."
Date:
February 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Critical Infrastructure Protection: Comments on the National Plan for Information Systems Protection
A statement of record issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the National Plan for Information Systems Protection, focusing on: (1) a detailed overview of the plan; (2) opportunities for sharpening the plan's proposals for improving the federal government's security programs; and (3) the challenges facing the government in building the public-private partnerships necessary for comprehensive infrastructure protections."
Date:
February 1, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library