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397 Matching Results
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Ultra-Intense-laser produced high-Z backlighters for Compton Radiography
None
Date:
August 14, 2007
Creator:
Tommasini, R
Object Type:
Article
System:
The UNT Digital Library
A Multivariate Time Series Method for Monte Carlo Reactor Analysis
A robust multivariate time series method has been established for the Monte Carlo calculation of neutron multiplication problems. The method is termed Coarse Mesh Projection Method (CMPM) and can be implemented using the coarse statistical bins for acquisition of nuclear fission source data. A novel aspect of CMPM is the combination of the general technical principle of projection pursuit in the signal processing discipline and the neutron multiplication eigenvalue problem in the nuclear engineering discipline. CMPM enables reactor physicists to accurately evaluate major eigenvalue separations of nuclear reactors with continuous energy Monte Carlo calculation. CMPM was incorporated in the MCNP Monte Carlo particle transport code of Los Alamos National Laboratory. The great advantage of CMPM over the traditional Fission Matrix method is demonstrated for the three space-dimensional modeling of the initial core of a pressurized water reactor.
Date:
August 14, 2008
Creator:
Ueki, Taro
Object Type:
Report
System:
The UNT Digital Library
Detecting the limits of regulatory element conservation anddivergence estimation using pairwise and multiple alignments
Background: Molecular evolutionary studies of noncodingsequences rely on multiple alignments. Yet how multiple alignmentaccuracy varies across sequence types, tree topologies, divergences andtools, and further how this variation impacts specific inferences,remains unclear. Results: Here we develop a molecular evolutionsimulation platform, CisEvolver, with models of background noncoding andtranscription factor binding site evolution, and use simulated alignmentsto systematically examine multiple alignment accuracy and its impact ontwo key molecular evolutionary inferences: transcription factor bindingsite conservation and divergence estimation. We find that the accuracy ofmultiple alignments is determined almost exclusively by the pairwisedivergence distance of the two most diverged species and that additionalspecies have a negligible influence on alignment accuracy. Conservedtranscription factor binding sites align better than surroundingnoncoding DNA yet are often found to be misaligned at relatively shortdivergence distances, such that studies of binding site gain and losscould easily be confounded by alignment error. Divergence estimates frommultiple alignments tend to be overestimated at short divergencedistances but reach a tool specific divergence at which they cease toincrease, leading to underestimation at long divergences. Our moststriking finding was that overall alignment accuracy, binding sitealignment accuracy and divergence estimation accuracy vary greatly acrossbranches in a tree and are most accurate for terminal branches connectingsister taxa and least …
Date:
August 14, 2006
Creator:
Pollard, Daniel A.; Moses, Alan M.; Iyer, Venky N. & Eisen,Michael B.
Object Type:
Article
System:
The UNT Digital Library
Development of a CO2 Sequestration Module by Integrating Mineral Activation and Aqueous Carbonation
Mineral carbonation is a promising concept for permanent CO{sub 2} sequestration due to the vast natural abundance of the raw materials and the permanent storage of CO{sub 2} in solid form as carbonates. The sequestration of CO{sub 2} through the employment of magnesium silicates--olivine and serpentine--is beyond the proof of concept stage. For the work done in this project, serpentine was chosen as the feedstock mineral due to its abundance and availability. Although the reactivity of olivine is greater than that of serpentine, physical and chemical treatments have been shown to increase greatly the reactivity of serpentine. The primary drawback to mineral carbonation is reaction kinetics. To accelerate the carbonation, aqueous processes are preferred, where the minerals are first dissolved in solution. In aqueous carbonation, the key step is the dissolution rate of the mineral, where the mineral dissolution reaction is likely to be surface-controlled. The relatively low reactivity of serpentine has warranted research into physical and chemical treatments that have been shown to greatly increase its reactivity. The use of sulfuric acid as an accelerating medium for the removal of magnesium from serpentine has been investigated. To accelerate the dissolution process, the mineral can be ground to very fine …
Date:
August 14, 2006
Creator:
Alexander, George; Aksoy, Parvana; Andresen, John; Maroto-Valer, Mercedes & Schobert, Harold
Object Type:
Report
System:
The UNT Digital Library
Greensheet (Houston, Tex.), Vol. 38, No. 325, Ed. 1 Tuesday, August 14, 2007
Free weekly newspaper that includes business and classified advertising.
Date:
August 14, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 332, Ed. 1 Thursday, August 14, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
August 14, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 334, Ed. 1 Friday, August 14, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
August 14, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 38, No. 326, Ed. 1 Tuesday, August 14, 2007
Free weekly newspaper that includes business and classified advertising.
Date:
August 14, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 333, Ed. 1 Thursday, August 14, 2008
Free weekly newspaper that includes business and classified advertising.
Date:
August 14, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 38, No. 33, Ed. 1 Thursday, August 14, 2008
Weekly newspaper from Port Aransas, Texas that includes local, state and national news along with extensive advertising.
Date:
August 14, 2008
Creator:
Judson, Mary Henkel
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 336, Ed. 1 Friday, August 14, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
August 14, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
[Letter from Eleanor Brown to Catherine Murphy, August 14, 2005]
Letter from Eleanor Brown to Catherine Murphy requesting reimbursement for expenses she incurred while traveling to WASP events. "Copy" is handwritten across the top and bottom of the page. Included with the letter are two confirmation emails from Expedia.com and a boarding pass for her flight to Washington, D.C.
Date:
August 14, 2005
Creator:
Brown, Eleanor McLernon
Object Type:
Letter
System:
The Portal to Texas History
Emergency Supplemental Appropriations Legislation for Disaster Assistance: Summary Data
This report provides summary information on emergency supplemental appropriations enacted after major disasters since 1989. The report discusses the most recent and costly disasters occurred in the summer of 2005 when Hurricanes Katrina, Rita, and Wilma made landfall in Gulf Coast states.
Date:
August 14, 2008
Creator:
Murray, Justin & Lindsay, Bruce R.
Object Type:
Report
System:
The UNT Digital Library
U.S. Food and Agricultural Imports: Safeguards and Selected Issues
This report discusses the food and agricultural imports, federal oversight responsibilities, international trade considerations, and legislative proposals. The report includes list of tables with leading suppliers of U.S. agriculture and seafood imports, and imported meat and poultry products presented for inspection.
Date:
August 14, 2008
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 153, No. 25, Ed. 1 Wednesday, August 14, 2002
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
August 14, 2002
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Jewish Post (Fort Worth, Tex.), Vol. 62, No. 33, Ed. 1 Thursday, August 14, 2008
Weekly Jewish newspaper from Fort Worth, Texas that includes local, state and national news along with extensive advertising.
Date:
August 14, 2008
Creator:
Wisch, Rene
Object Type:
Newspaper
System:
The Portal to Texas History
[Woman placing cardboard sign into group of vegetables]
Photograph of a lady placing a price sign on a variety of vegetables at a farmers market. There are two cargo trucks parked behind the lady.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Woman placing vegetables in piles]
Photograph of a woman arranging vegetables at a farmers market. There are several cardboard signs shown on the vegetables and cloves of garlic are visible hanging from the roof. There are two trucks parked behind the lady.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Woman reaching over groups of vegetables]
Photograph of a woman arranging vegetables at a farmers market. There are two cargo trucks parked behind the lady.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Man with baskets of fruit and cardboard signs]
Photograph of a man at a farmers market with buckets of fruit placed in front of him. Two cardboard signs are also shown in the photograph describing the fruit prices.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Melon in foreground and man with baskets of vegetables in background]
Photograph of a man at a farmers market with buckets of fruit placed in front of him. Two cardboard signs are also shown in the photograph describing the fruit prices.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Woman paying for bags of produce]
Photograph of a lady paying for produce at a farmers market with a plastic bag on her left hand. The employee is handing over a plastic bag to the lady with her right hand while reaching for the payment with her left hand. A variety of vegetables are shown stacked in the photograph and cardboard signs describing prices.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Women placing produce into plastic bags]
None
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library
[Woman placing sign in baskets of vegetables]
Photograph of a lady placing a price sign on a variety of vegetables at a farmers market. There are two cargo trucks parked behind the lady.
Date:
August 14, 2006
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The UNT Digital Library