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Pulse Jet Mixer Overblow Testing for Assessment of Loadings During Multiple Overblows
The U.S. Department of Energy (DOE) Office of River Protection’s Waste Treatment Plant (WTP) is being designed and built to pretreat and then vitrify a large portion of the wastes in Hanford’s 177 underground waste storage tanks. The WTP consists of three primary facilities: pretreatment, low-activity waste (LAW) vitrification, and high-level waste (HLW) vitrification. The pretreatment facility will receive waste feed from the Hanford tank farms and separate it into 1) a high-volume, low-activity liquid stream stripped of most solids and radionuclides and 2) a much smaller volume of HLW slurry containing most of the solids and most of the radioactivity. Many of the vessels in the pretreatment facility will contain pulse jet mixers (PJMs) that will provide some or all of the mixing in the vessels. This technology was selected for use in so-called “black cell” regions of the WTP, where maintenance capability will not be available for the operating life of the WTP. PJM technology was selected for use in these regions because it has no moving mechanical parts that require maintenance. The vessels with the most concentrated slurries will also be mixed with air spargers and/or steady jets in addition to the mixing provided by the PJMs. …
Date:
March 3, 2008
Creator:
Pfund, David M.; Bontha, Jagannadha R.; Michener, Thomas E.; Nigl, Franz; Yokuda, Satoru T.; Leigh, Richard J. et al.
Object Type:
Report
System:
The UNT Digital Library
The effect of problem perturbations on nonlinear dynamical systems and their reduced order models
Reduced order models are used extensively in many areas of science and engineering for simulation, design, and control. Reduction techniques for nonlinear dynamical systems produce models that depend strongly on the nominal set of parameters for which the reduction is carried out. In this paper we address the following two questions: 'What is the effect of perturbations in the problem parameters on the output functional of a nonlinear dynamical system?' and 'To what extent does the reduced order model capture this effect?'
Date:
March 3, 2005
Creator:
Serban, R; Homescu, C & Petzold, L
Object Type:
Article
System:
The UNT Digital Library
Accelerator mass spectrometry of Strontium-90 for homeland security, environmental monitoring, and human health
Strontium-90 is one of the most hazardous materials managed by agencies charged with protecting the public from radiation. Traditional radiometric methods have been limited by low sample throughput and slow turnaround times. Mass spectrometry offers the advantage of shorter analysis times and the ability to measure samples immediately after processing, however conventional mass spectrometric techniques are susceptible to molecular isobaric interferences that limit their overall sensitivity. In contrast, accelerator mass spectrometry is insensitive to molecular interferences and we have therefore begun developing a method for determination of {sup 90}Sr by accelerator mass spectrometry. Despite a pervasive interference from {sup 90}Zr, our initial development has yielded an instrumental background of {approx} 10{sup 8} atoms (75 mBq) per sample. Further refinement of our system (e.g., redesign of our detector, use of alternative target materials) is expected to push the background below 10{sup 6} atoms, close to the theoretical limit for AMS. Once we have refined our system and developed suitable sample preparation protocols, we will utilize our capability in applications to homeland security, environmental monitoring, and human health.
Date:
March 3, 2008
Creator:
Tumey, S J; Brown, T A; Hamilton, T F & Hillegonds, D J
Object Type:
Article
System:
The UNT Digital Library
Direct CP, Lepton Flavor and Isospin Asymmetries in the Decays B->K(*)l+l-
We measure rate asymmetries for the rare decays B {yields} K{sup (*)}{ell}{sup +}{ell}{sup -}, where {ell}{sup +}{ell}{sup -} is either e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -}, using a sample of 384 million B{bar B} events collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider. We find no evidence for direct CP or lepton-flavor asymmetries. For dilepton masses below the J/{psi} resonance, we find evidence for unexpectedly large isospin asymmetries in both B {yields} K{ell}{sup +}{ell}{sup -} and B {yields} K*{ell}{sup +}{ell}{sup -} which differ respectively by 3.2{sigma} and 2.7{sigma}, including systematic uncertainties, from the Standard Model expectations.
Date:
March 3, 2009
Creator:
Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Greensheet (Houston, Tex.), Vol. 40, No. 49, Ed. 1 Tuesday, March 3, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
March 3, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 50, Ed. 1 Tuesday, March 3, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
March 3, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 36, No. 45, Ed. 1 Thursday, March 3, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
March 3, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 35, No. 602, Ed. 1 Thursday, March 3, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
March 3, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 46, Ed. 1 Friday, March 3, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
March 3, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 48, Ed. 1 Friday, March 3, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
March 3, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Mannford Eagle (Mannford, Okla.), Vol. 22, No. 44, Ed. 1 Wednesday, March 3, 2004
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 3, 2004
Creator:
Retherford, Bill R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Woman speaking at 2007 College of Arts and Sciences Advisory Board planning retreat
Photograph of a woman speaking at the 2007 UNT College of Arts and Sciences Advisory Board planning retreat. Her nametag is hard to read but her name might be "Leane Markey."
Date:
March 3, 2007
Creator:
unknown
Object Type:
Image
System:
The UNT Digital Library
Unidentified woman speaks at 2007 College of Arts and Sciences Advisory Board planning retreat
Photograph of an unidentified woman giving a presentation at the 2007 UNT College of Arts and Sciences Advisory Board planning retreat.
Date:
March 3, 2007
Creator:
unknown
Object Type:
Image
System:
The UNT Digital Library
Larry Brinkley at 2007 College of Arts and Sciences Advisory Board planning retreat
Photograph of Larry Brinkley at the 2007 UNT College of Arts and Sciences Advisory Board planning retreat speaking to someone out of frame.
Date:
March 3, 2007
Creator:
unknown
Object Type:
Image
System:
The UNT Digital Library
Nissa Gordon Wilkins at 2007 College of Arts and Sciences Advisory Board planning retreat
Photograph of Nissa Gordon Wilkins at the 2007 UNT College of Arts and Sciences Advisory Board planning retreat. Ms. Wilkins stands in front of a white board with the retreat's agenda handwritten on it.
Date:
March 3, 2007
Creator:
unknown
Object Type:
Image
System:
The UNT Digital Library
Trade Preferences for Developing Countries and the WTO
This report discusses the trade preferences and General Agreement on Tariffs and Trade (GATT) most-favored-nation (MFN) requirements, World Trade Organization (WTO) waivers for preferential trade agreements, and WTO waivers for U.S. preference programs.
Date:
March 3, 2008
Creator:
Grimmett, Jeanne J.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 155, No. 2, Ed. 1 Wednesday, March 3, 2004
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
March 3, 2004
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
81st Texas Legislature, Senate Concurrent Resolutions 32
Concurrent resolution introduced by the Texas Senate and House of Representatives relating to granting the legislature permission to adjourn for more than three days during the period beginning on Wednesday, February 25, 2009, and ending on Monday, March 2, 2009.
Date:
March 3, 2009
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 88, No. 85, Ed. 1 Wednesday, March 3, 2004
Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date:
March 3, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Scene: North Texas Daily (Denton, Tex.), Vol. 90, No. 82, Ed. 1 Friday, March 3, 2006
Weekly magazine edition of the daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date:
March 3, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 93, No. 24, Ed. 1 Tuesday, March 3, 2009
Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date:
March 3, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 59, No. 9, Ed. 1 Thursday, March 3, 2005
Weekly Jewish newspaper from Fort Worth, Texas that includes local, state and national news along with extensive advertising.
Date:
March 3, 2005
Creator:
Wisch, Rene
Object Type:
Newspaper
System:
The Portal to Texas History
The University News (Irving, Tex.), Vol. 34, No. 18, Ed. 1 Tuesday, March 3, 2009
Weekly student newspaper from the University of Dallas in Irving, Texas that includes campus news and commentaries along with advertising.
Date:
March 3, 2009
Creator:
Tetzlaff, Mary
Object Type:
Newspaper
System:
The Portal to Texas History
The University News (Irving, Tex.), Vol. 33, No. 18, Ed. 1 Wednesday, March 3, 2004
Weekly student newspaper from the University of Dallas in Irving, Texas that includes campus news and commentaries along with advertising.
Date:
March 3, 2004
Creator:
Kuckelman, Meghan
Object Type:
Newspaper
System:
The Portal to Texas History