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Altus Times (Altus, Okla.), Vol. 101, No. 6, Ed. 1 Tuesday, March 21, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 21, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Analysis of hazardous biological material by MALDI mass spectrometry
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-MS) has become a valuable tool for analyzing microorganisms. The speed with which data can be obtained from MALDI-MS makes this a potentially important tool for biological health hazard monitoring and forensic applications. The excitement in the mass spectrometry community in this potential field of application is evident by the expanding list of research laboratories pursuing development of MALDI-MS for bacterial identification. Numerous research groups have demonstrated the ability to obtain unique MALDI-MS spectra from intact bacterial cells and bacterial cell extracts. The ability to differentiate strains of the same species has been investigated. Reproducibility of MALDI-MS spectra from bacterial species under carefully controlled experimental conditions has also been demonstrated. Wang et al. have reported on interlaboratory reproducibility of the MALDI-MS analysis of several bacterial species. However, there are still issues that need to be addressed, including the careful control of experimental parameters for reproducible spectra and selection of optimal experimental parameters such as solvent and matrix.
Date:
March 21, 2000
Creator:
Wahl, K. L.; Jarman, K. H.; Valentine, N. B.; Kingsley, M. T.; Petersen, C. E.; Cebula, S. T. et al.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 122, Ed. 1 Tuesday, March 21, 2000
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 21, 2000
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Bent Solenoids with Superimposed Dipole Fields
A conceptual design and manufacturing technique were developed for a superconducting bent solenoid magnet with a superimposed dipole field that would be used as a dispersion device in the cooling channel of a future Muon Collider. The considered bent solenoid is equivalent to a 180° section of a toroid with a major radius of ~610 mm and a coil aperture of ~416 mm. The required field components of this magnet are 4 tesla for the solenoid field and 1 tesla for the superimposed dipole field. A magnet of this size and shape, operating at these field levels, has to sustain large Lorentz forces resulting in a maximum magnetic pressure of about 2,000 psi. A flexible round mini-cable with 37 strands of Cu-NbTi was selected as the superconductor. Detailed magnetic analysis showed that it is possible to obtain the required superimposed dipole field by tilting the winding planes of the solenoid by ~25°. A complete structural analysis of the coil support system and the helium containment vessel under thermal, pressure, and Lorentz force loads was carried out using 3D finite element models of the structures. The main technical issues were studied and solutions were worked out so that a highly reliable …
Date:
March 21, 2000
Creator:
Meinke, Rainer, B. & Goodzeit, Carl, L.
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 95, No. 23, Ed. 1 Tuesday, March 21, 2000
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
March 21, 2000
Creator:
Keasling, Edna & Fierro, Jennifer
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Herald (Brady, Tex.), Vol. 57, No. 19, Ed. 1 Tuesday, March 21, 2000
Weekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
March 21, 2000
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Cold Vacuum Drying (CVD) Set Point Determination
The Safety Class Instrumentation and Control (SCIC) system provides active detection and response to process anomalies that, if unmitigated, would result in a safety event. Specifically, actuation of the SCIC system includes two portions. The portion which isolates the MCO and initiates the safety-class helium (SCHe) purge, and the portion which detects and stops excessive heat input to the MCO on high tempered water MCO inlet temperature. For the MCO isolation and purge, the SCIC receives signals from MCO pressure (both positive pressure and vacuum), helium flow rate, bay high temperature switches, seismic trips and time under vacuum trips.
Date:
March 21, 2000
Creator:
PHILIPP, B.L.
Object Type:
Report
System:
The UNT Digital Library
Combating Terrorism: Need to Eliminate Duplicate Federal Weapons of Mass Destruction Training
A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the potential for duplicative weapons of mass destruction training, focusing on: (1) the principal federal organizations that provide weapons of mass destruction training to first responders; (2) whether the training is well coordinated among federal organizations; and (3) actions being taken to improve the federal government's role in weapons of mass destruction training."
Date:
March 21, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Effect of Stainless-Steel Containers on High-Resolution Gamma-Ray Analysis of Plutonium
The goal of this work was to determine the effects on plutonium isotopic analysis of having plutonium inside of a 0.25 inch thick stainless steel can. To do this, they analyzed plutonium samples with a U-Pu InSpector (which uses a high-resolution gamma-ray detector and the analysis code MGA (Multi Group Analysis)), to determine both the 240-Pu/239-Pu ratio and the years since the plutonium was separated from americium. They analyzed a 1.6 kg plutonium sample that was placed inside of a 0.25 inch can at varying distances (0-2 meters) and count times (10 seconds-30 minutes). In separate experiments, they analyzed 0.4g plutonium sources with stainless-steel thickness' ranging from 0.125 to 1.0 inch. This report will show three effects of having plutonium in a stainless steel can: (1) 240-Pu/240-Pu can be quickly and accurately determined for a 1.6 kg plutonium sample inside of a 0.25 inch thick stainless-steel can, as this thickness of stainless steel acts as a perfect filter to reduce the intense 59 keV gamma peak from 241-Am. (2) The accuracy of determining the plutonium-americium separation date is not effected by 0.25 inch of stainless steel. (3) Both 240-Pu/239-Pu and the americium separation date can be accurately determined for stainless-steel …
Date:
March 21, 2000
Creator:
Dougan, R.; Koenig, Z. & Kitt, B.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2000-03-21 - Spectrum 3
Access:
Use of this item is restricted to the UNT Community
Concert presented at the UNT College of Music Recital Hall.
Date:
March 21, 2000
Creator:
unknown
Object Type:
Sound
System:
The UNT Digital Library
An Evaluation of Activated Bismuth Isotopes in Environmental Samples From the Former Western Pacific Proving Grounds
{sup 207}Bi (t{sub 1/2}=32.2 y) was generated by activation of weapons material during a few ''clean'' nuclear tests at the U.S. Western Pacific Proving Grounds of Enewetak and Bikini Atolls. The radionuclides first appeared in the Enewetak environment during 1958 and in the environment of Bikini during 1956. Crater sediments from Bikini with high levels of {sup 207}Bi were analyzed by gamma spectrometry in an attempt to determine the relative concentrations of {sup 208}Bi (t{sup 1/2} = 3.68 x 10{sup 5} y). The bismuth isotopes were probably generated during the ''clean'', 9.3 Mt Poplar test held on 7/12/58. The atom ratio of {sup 208}Bi to {sup 207}Bi (R value) ranges from {approx}12 to over 200 in sections of core sediments from the largest nuclear crater at Bikini atoll. The presence of bismuth in the device is suggested to account for R values in excess of 10.
Date:
March 21, 2000
Creator:
Robison, W. L.; Brunk, J. A. & Jokela, T. A.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, March 21, 2000
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 21, 2000
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
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
Final report: DOE Grant ''Development of focusing monochromators for neutron scattering instruments'' (DE-FG02-96ER45599)
Bent crystal monochromators were developed for the neutron scattering community: (1) doubly focusing bulk silicon, for high-resolution neutron diffraction; (2) doubly focusing multi-wafer silicon, for residual stress instruments; (3) silicon-wafer: (a) with pneumatic spherical bending, (b) with mechanical cylindrical bending, (c) with mechanical two-dimensional bending, for high-resolution three-axis spectrometry; (4) doubly focusing multi-wafer silicon, for epithermal (eV range) neutrons; (5) doubly focusing composite pyrolytic graphite (low-cost), for high-flux applications.
Date:
March 21, 2000
Creator:
Popovici, Mihai P.
Object Type:
Report
System:
The UNT Digital Library
Financial Management: USDA Faces Major Financial Management Challenges
Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the financial management issues facing the Department of Agriculture (USDA), focusing on problems in the areas of: (1) implementing the Federal Credit Reform Act (FCRA) of 1990 and related accounting standards; (2) reconciling its Fund Balance with Treasury accounts; (3) addressing weaknesses in the Forest Service's financial accounting and reporting; (4) correcting certain other material internal control weaknesses; and (5) complying with some key laws and regulations."
Date:
March 21, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Formation and diffusion of S-decorated clusters on Cu(111)
Because of their strong internal bonding, S-decorated Cu trimers are a likely agent of S-enhanced Cu transport between islands on Cu(111). According to ab-initio calculations, excellent healing of dangling Cu valence results in an ad-Cu{sub 3}S{sub 3} formation energy of only {approximately}0.28 eV, compared to 0.79 eV for a self-adsorbed Cu atom, and a diffusion barrier {le}0.35 eV.
Date:
March 21, 2000
Creator:
FEIBELMAN,PETER J.
Object Type:
Article
System:
The UNT Digital Library
Groundwater Quality Assessment Plan for Single-Shell Tank Waste Management Area U at the Hanford Site
Specific conductance in one of the downgradient well exceeded its background value during the fourth quarter of FY 1999, triggering an upgrade from detection monitoring to a groundwater quality assessment program. This document presents the investigatory approach to be used for the assessment program. The objective of the first phase of the assessment program is to make the first determination to determine whether the WMA is the source of dangerous waste or dangerous waste constituents in the groundwater.
Date:
March 21, 2000
Creator:
Hodges, Floyd N. & Chou, Charissa J.
Object Type:
Report
System:
The UNT Digital Library
Groundwater quality assessment plan for single-shell tank waste management Area U at the Hanford Site
Waste Management Area U (WMA U) includes the U Tank Farm, is currently regulated under RCRA interim-status regulations, and is scheduled for closure probably post-2030. Groundwater monitoring has been under an evaluation program that compared general contaminant indicator parameters from downgradient wells to background values established from upgradient wells. One of the indicator parameters, specific conductance, exceeded its background value in one downgradient well triggering a change from detection monitoring to a groundwater quality assessment program. The objective of the first phase of this assessment program is to determine whether the increased concentrations of nitrate and chromium in groundwater are from WMA U or from an upgradient source. Based on the results of the first determination, if WMA U is not the source of contamination, then the site will revert to detection monitoring. If WMA U is the source, then a second part of the groundwater quality assessment plan will be prepared to define the rate and extent of migration of contaminants in the groundwater and their concentrations.
Date:
March 21, 2000
Creator:
Hodges, FN & Chou, CJ
Object Type:
Report
System:
The UNT Digital Library
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
How to select nonlinear crystals and model their performance using SNLO Software
SNLO is public domain software developed at Sandia National Laboratories. It is intended to assist in the selection of the best nonlinear crystal for a particular application, and in predicting its performance. This paper briefly describes its functions and how to use them.
Date:
March 21, 2000
Creator:
SMITH,ARLEE V.
Object Type:
Article
System:
The UNT Digital Library
In situ redox manipulation of subsurface sediments from Fort Lewis, Washington: Iron reduction and TCE dechlorination mechanisms
Pacific Northwest National Laboratory (PNNL) conducted a bench-scale study to determine how effective chemically treated Ft. Lewis sediments can degrade trichloroethylene (TCE). The objectives of this experimental study were to quantify: (1) sediment reduction and oxidation reactions, (2) TCE degradation reactions, and (3) other significant geochemical changes that occurred. Sediment reduction and oxidation were investigated to determine the mass of reducible iron in the Ft. Lewis sediments and the rate of this reduction and subsequent oxidation at different temperatures. The temperature dependence was needed to be able to predict field-scale reduction in the relatively cold ({approximately}11 C) Ft. Lewis aquifer. Results of these experiments were used in conjunction with other geochemical and hydraulic characterization to design the field-scale injection experiment and predict barrier longevity. For example, the sediment reduction rate controls the amount of time required for the dithionite solution to fully react with sediments. Sediment oxidation experiments were additionally conducted to determine the oxidation rate and provide a separate measure of the mass of reduced iron. Laboratory experiments that were used to meet these objectives included: (1) sediment reduction in batch (static) systems, (2) sediment reduction in 1-D columns, and (3) sediment oxidation in 1-D columns. Multiple reaction modeling …
Date:
March 21, 2000
Creator:
Szecsody, J. E.; Fruchter, J. S.; Sklarew, D. S. & Evans, J. C.
Object Type:
Report
System:
The UNT Digital Library
Installation of a Synchrotron Radiation Beamline Facility at the J. Bennett Johnston Center. Final Report
The Johnston Center presents a unique opportunity for scientists and engineers at southern institutions to initiate and carry out original research using synchrotron radiation ranging from visible light to hard x-rays. The Science and Engineering Alliance proposes to carry out a comprehensive new synchrotron radiation research initiative at CAMD in carefully phased steps of increasing risks. (1) materials research on existing CAMD beam lines and end stations; (2) design, construction and installation of end stations on existing CAMD beam lines, and research with this new instrumentation; (3) design, construction and operation of dedicated synchrotron radiation beam lines that covers the full spectral range of the CAMD storage ring and expanded research in the new facility.
Date:
March 21, 2000
Creator:
Gooden, R.
Object Type:
Report
System:
The UNT Digital Library
Ion exchange distribution coefficients for {sup 137}Cs and {sup 99}Tc removal from Hanford tank supernatants AW-101 (Envelope A) and AN-107 (Envelope C)
The current BNFL Inc. flow sheet for the pretreatment of the Hanford High-Level tank wastes includes the use of Superlig{reg_sign} materials in a dual column system for the removal of {sup 137}Cs and {sup 99}Tc from the aqueous fraction of the waste. The Superlig{reg_sign} materials include the cesium selective Superlig 632and Superlig 644 for removal of {sup 137}Csband Superlig 639 for the removal of {sup 99}Tc present as TcO{sub 4}{sup {minus}}. These materials have been developed and supplied by IBC Technologies, Inc., American Fork, UT. The objectives of this work were to: Evaluate the equilibrium behavior of the Superlig materials for the removal of {sup 137}Cs and {sup 99}Tc (as pertechnetate) from AW-101 (Envelope A) and AN-107 (Envelope C) clarified supernatants; Obtain information of the composition of ion exchange feed streams and the pertechnetate/nonpertechnetate fraction in the samples; and Determine some of the Superlig material physical properties including particle size distribution, dry density and water content. To evaluate the equilibrium behavior, batch contacts at a phase ratio of 100 (5 mL of waste solution: 0.05g of exchanger) were conducted with each of the Superlig materials and each of the waste envelope samples. In order to obtain equilibrium data that bounds …
Date:
March 21, 2000
Creator:
Kurath, D. E.; Blanchard, D. L. & Bontha, J. R.
Object Type:
Report
System:
The UNT Digital Library
Laboratory experiments on arc deflection and instability
This article describes experiments on arc deflection instability carried out during the past few years at the Princeton University Plasma Physics Laboratory (PPPL). The approach has been that of plasma physicists interested in arcs, but they believe these results may be useful to engineers who are responsible for controlling arc behavior in large electric steel furnaces.
Date:
March 21, 2000
Creator:
Zweben, S. & Karasik, M.
Object Type:
Report
System:
The UNT Digital Library