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428 Matching Results
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Analytical Method for Measuring Total Protium and Total Deuterium in a Gas Mixture Containing H2, D2, and HD Via Gas Chromatography
A new analytical technique has been developed that measures both total protium (H) and deuterium (D) in a gas mixture containing H2, D2, and HD. This new analytical technique uses a micro gas chromatograph (GC) with two molecular sieve columns. One column uses D2 as the carrier gas and the other uses H2 as the carrier gas. Laboratory tests have shown that when used in this configuration the GC can measure both total protium and total deuterium, each with a sensitivity of less than 20 ppm. This new analytical technique was developed as a result of a request to provide instrumentation to measure the protium and deuterium concentrations at several process points during initial testing of the new hydrogen tritium thermal cycling absorption process columns.
Date:
March 24, 2004
Creator:
SESSIONS, HENRY
Object Type:
Report
System:
The UNT Digital Library
ANSI/ANS 8.12, Nuclear Criticality Control and Safety of Plutonium-Uranium Fuel Mixtures Outside Reactors
None
Date:
May 24, 2004
Creator:
Huang, S T
Object Type:
Article
System:
The UNT Digital Library
An Appraisal of Coupled Climate Model Simulations
In 2002, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) proposed the concept for a state-of-the-science appraisal of climate models to be performed approximately every two years. Motivation for this idea arose from the perceived needs of the international modeling groups and the broader climate research community to document progress more frequently than provided by the Intergovernmental Panel on Climate Change (IPCC) Assessment Reports. A committee of external reviewers, which included senior researchers from four leading international modeling centers, supported the concept by stating in its review: ''The panel enthusiastically endorses the suggestion that PCMDI develop an independent appraisal of coupled model performance every 2-3 years. This would provide a useful 'mid-course' evaluation of modeling progress in the context of larger IPCC and national assessment activities, and should include both coupled and single-component model evaluations.''
Date:
February 24, 2004
Creator:
Sperber, K.; Gleckler, P.; Covey, C.; Taylor, K.; Bader, D.; Phillips, T. et al.
Object Type:
Report
System:
The UNT Digital Library
APS Performance Summary - Update
High Energy Density Physics (HEDP) Experiments play an important role in corroborating the improved physics codes that underlie LLNL's Stockpile Stewardship mission. Conducting these experiments, whether on the National Ignition Facility (NIF) or another national facility such as Omega, will require not only improvement in the diagnostics for measuring the experiment, but also detailed knowledge of the as-built target components and assemblies themselves. To assist in this effort, a defined set of well-known reference standards have been built and are being used to quantify the performance of different characterization techniques. Without the critical step of using reference standards for qualifying characterization tools there can be no verification of either commercial or internally-developed characterization techniques and thus there is an uncertainty in the input to the as-built physics codes. In FY03, two reference standards were fabricated and characterized using metrology tools. One of the reference standards was built with a cylindrical geometry and the second reference standard was built with a spherical geometry. The standards were designed for manufacturability, stability, and to provide a range of features that can be measured using NDE methods. Detailed information about these methods has been previously documented.
Date:
September 24, 2004
Creator:
Gross, J.; Kozioziemski, B.; Waters, A. & Martz, H.
Object Type:
Report
System:
The UNT Digital Library
The Archer Advocate (Holliday, Tex.), Vol. 2, No. 34, Ed. 1 Wednesday, November 24, 2004
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
November 24, 2004
Creator:
Thomas, John
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 26, Ed. 1 Thursday, June 24, 2004
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
June 24, 2004
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Asian Summer Monsoon Intraseasonal Variability in General Circulation Models
The goals of this report are: (1) Analyze boreal summer Asian monsoon intraseasonal variability general circulation models--How well do the models represent the eastward and northward propagating components of the convection and how well do the models represent the interactive control that the western tropical Pacific rainfall exerts on the rainfall over India and vice-versa? (2) Role of air-sea interactions--prescribed vs. interactive ocean; and (3) Mean monsoon vs. variability.
Date:
February 24, 2004
Creator:
Sperber, K R & Annamalai, H
Object Type:
Report
System:
The UNT Digital Library
Aviation Security-Related Findings and Recommendations of the 9/11 Commission
The 9/11 Commission issued several recommendations designed to strengthen aviation security by: enhancing passenger pre-screening; improving measures to detect explosives on passengers; addressing human factors issues at screening checkpoints; expediting deployment of in-line baggage screening systems; intensifying efforts to identify, track, and screen potentially dangerous cargo; and deploying hardened cargo containers on passenger aircraft. In addition to these specific recommendations, an overarching recommendation for transportation security policy asserts that priorities should be set based on risk, and the most practical and cost effective deterrents should be implemented assigning appropriate roles and missions to federal, state, and local authorities, as well as private stakeholders.
Date:
August 24, 2004
Creator:
Elias, Bartholomew
Object Type:
Report
System:
The UNT Digital Library
Axial Pressure Drop Measurements during Pilot-Scale Testing of a Mott Crossflow Filter
The Department of Energy selected CSSX as the preferred cesium removal technology for Savannah River Site waste. As a pretreatment step for the CSSX flowsheet, personnel contact the incoming salt solution that contains entrained sludge with MST to adsorb strontium and select actinides. They filter the resulting slurry to remove the sludge and MST. The filtrate receives further treatment to remove cesium in the solvent extraction system. The baseline filtration technology uses a Mott crossflow filter. We conducted pilot-scale crossflow filter testing with simulated SRS high level waste to evaluate the impact of operating parameters on the crossflow filtration process. The tests employed 0.5 micron and 0.1 micron filters. The feed slurries for these tests included simulated sludge plus MST, simulated sludge only, and simulated sludge plus manganese oxide solids. The supernate for these tests consisted of 5.6-6.4 M sodium, average salt solution. During the tests, we measured the axial pressure drop as a function of axial velocity, feed slurry, and insoluble solids concentration. This report documents the axial pressure drop data.
Date:
June 24, 2004
Creator:
POIRIER, MICHAEL
Object Type:
Report
System:
The UNT Digital Library
B-factory signals for a warped extra dimension
We study predictions for B-physics in a class of models, recently introduced, with a non-supersymmetric warped extra dimension. In these models few ({approx} 3) TeV Kaluza-Klein masses are consistent with electroweak data due to bulk custodial symmetry. Furthermore, there is an analog of GIM mechanism which is violated by the heavy top quark (just as in SM) leading to striking signals at B-factories: (1) New Physics (NP) contributions to {Delta}F = 2 transitions are comparable to SM. This implies that, within this NP framework, the success of the SM unitarity triangle fit is a ''coincidence''. Thus, clean extractions of unitarity angles via e.g. B {yields} {pi}{pi}, {rho}{pi}, {rho}{rho}, DK are likely to be affected, in addition to O(1) deviation from SM prediction in Bs mixing. (2) O(1) deviation from SM predictions for B {yields} X{sub s}{ell}{sup +}{ell}{sup -} in rate as well as in forward-backward and direct CP asymmetry. (3) Large mixing-induced CP asymmetry in radiative B decays, wherein the SM unambiguously predicts very small asymmetries. Also, with KK masses 3 TeV or less, and with anarchic Yukawa masses, contributions to electric dipole moments of the neutron are roughly 20 times larger than the current experimental bound so that this …
Date:
August 24, 2004
Creator:
Agashe, Kaustubh; Perez, Gilad & Soni, Amarjit
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 53, Ed. 1 Saturday, January 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
January 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 84, Ed. 1 Tuesday, February 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 113, Ed. 1 Wednesday, March 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 145, Ed. 1 Saturday, April 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
April 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 175, Ed. 1 Monday, May 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 206, Ed. 1 Thursday, June 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
June 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 82, No. 236, Ed. 1 Saturday, July 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 259, Ed. 1 Tuesday, August 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
August 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 295, Ed. 1 Friday, September 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
September 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 325, Ed. 1 Sunday, October 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 83, No. 355, Ed. 1 Wednesday, November 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
November 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 84, No. 19, Ed. 1 Friday, December 24, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 24, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Benchmarking optimization software with COPS 3.0.
The authors describe version 3.0 of the COPS set of nonlinearly constrained optimization problems. They have added new problems, as well as streamlined and improved most of the problems. They also provide a comparison of the FILTER, KNITRO, LOQO, MINOS, and SNOPT solvers on these problems.
Date:
May 24, 2004
Creator:
Dolan, E. D.; More, J. J. & Munson, T. S.
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 98, No. 16, Ed. 1 Tuesday, February 24, 2004
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
February 24, 2004
Creator:
Cartwright, Brian & Morgan, Clay
Object Type:
Newspaper
System:
The Portal to Texas History