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Grafting AMR Capability Into the Diffusion Package of an Existing ALE Code
None
Date:
December 31, 2012
Creator:
Howell, Louis
System:
The UNT Digital Library
The Radio and Optical Luminosity Evolution of Quasars II - The SDSS Sample
We determine the radio and optical luminosity evolutions and the true distribution of the radio loudness parameter R, defined as the ratio of the radio to optical luminosity, for a set of more than 5000 quasars combining SDSS optical and FIRST radio data. We apply the method of Efron and Petrosian to access the intrinsic distribution parameters, taking into account the truncations and correlations inherent in the data. We find that the population exhibits strong positive evolution with redshift in both wavebands, with somewhat greater radio evolution than optical. With the luminosity evolutions accounted for, we determine the density evolutions and local radio and optical luminosity functions. The intrinsic distribution of the radio loudness parameter R is found to be quite different than the observed one, and is smooth with no evidence of a bi-modality in radio loudness. The results we find are in general agreement with the previous analysis of Singal et al., 2011 which used POSS-I optical and FIRST radio data.
Date:
December 28, 2012
Creator:
Singal, J.; Petrosian, V.; Stawarz, L. & Lawrence, A.
System:
The UNT Digital Library
Roles of Information Technology in Nuclear Criticality Safety Training
None
Date:
December 28, 2012
Creator:
Huang, S.; Lee, M.; Morman, J.; Goold, R.; Lee, C. & Heinrichs, D.
System:
The UNT Digital Library
Collisionless coupling of ion and electron temperatures in counter-streaming plasma flows
None
Date:
December 27, 2012
Creator:
Ross, J. S.; Park, H. S.; Berger, D.; Divol, L.; Kugland, N. L.; Rozmus, W. et al.
System:
The UNT Digital Library
Averages of B-Hadron, C-Hadron, and Tau-Lepton Properties as of Early 2012
This report talks about Averages of B-Hadron, C-Hadron, and Tau-Lepton Properties as of Early 2012
Date:
December 21, 2012
Creator:
Amhis, Y.; /LPHE, Lausanne; Banerjee, Sw.; U., /Victoria; Bernhard, R.; U., /Freiburg et al.
System:
The UNT Digital Library
Gravitationally Consistent HALO Catalogs and Merger Trees for Precision Cosmology
Presents a new algorithm for generating merger trees and halo catologs.
Date:
December 21, 2012
Creator:
Behroozi, Peter S.; Wechsler, Risa H.; Wu, Hao-Yi; Busha, Michael T.; Klypin, Anatoly A. & Primack, Joel R.
System:
The UNT Digital Library
The Rockstar Phase-Space Temporal HALO Finder and the Velocity Offsets of Cluster Cores
Presents a new algorithm for identifying dark matter halos, substructure, and tidal features.
Date:
December 21, 2012
Creator:
Behroozi, Peter S.; Wechsler, Risa H. & Wu, Hao-Yi
System:
The UNT Digital Library
Sheet Beam Klystron for the Navy FEL
None
Date:
December 21, 2012
Creator:
Jensen, Aaron; Fazio, Michael; Haase, Andy; Jongewaard, Erik; Martin, David; Neilson, Jeff et al.
System:
The UNT Digital Library
One System Integrated Project Team: Retrieval And Delivery Of The Hanford Tank Wastes For Vitrification In The Waste Treatment Plant
The One System Integrated Project Team (IPT) was formed in late 2011 as a way for improving the efficiency of delivery and treatment of highly radioactive waste stored in underground tanks at the U.S. Department of Energy's (DOE's) 586-square-mile Hanford Site in southeastern Washington State. The purpose of the One System IPT is to improve coordination and integration between the Hanford's Waste Treatment Plant (WTP) contractor and the Tank Operations Contractor (TOC). The vision statement is: One System is a WTP and TOC safety conscious team that, through integrated management and implementation of risk-informed decision and mission-based solutions, will enable the earliest start of safe and efficient treatment of Hanford's tank waste, to protect the Columbia River, environment and public. The IPT is a formal collaboration between Bechtel National, Inc. (BNI), which manages design and construction of the WTP for the U.S. Department of Energy's Office of River Protection (DOEORP), and Washington River Protection Solutions (WRPS), which manages the TOC for ORP. More than fifty-six (56) million gallons of highly radioactive liquid waste are stored in one hundred seventy-seven (177) aging, underground tanks. Most of Hanford's waste tanks - one hundred forty-nine (149) of them - are of an old …
Date:
December 20, 2012
Creator:
Harp, Benton J.; Kacich, Richard M. & Skwarek, Raymond J.
System:
The UNT Digital Library
Thermal Analysis for Ion-Exchange Column System
Models have been developed to simulate the thermal characteristics of crystalline silicotitanate ion exchange media fully loaded with radioactive cesium either in a column configuration or distributed within a waste storage tank. This work was conducted to support the design and operation of a waste treatment process focused on treating dissolved, high-sodium salt waste solutions for the removal of specific radionuclides. The ion exchange column will be installed inside a high level waste storage tank at the Savannah River Site. After cesium loading, the ion exchange media may be transferred to the waste tank floor for interim storage. Models were used to predict temperature profiles in these areas of the system where the cesium-loaded media is expected to lead to localized regions of elevated temperature due to radiolytic decay. Normal operating conditions and accident scenarios (including loss of solution flow, inadvertent drainage, and loss of active cooling) were evaluated for the ion exchange column using bounding conditions to establish the design safety basis. The modeling results demonstrate that the baseline design using one central and four outer cooling tubes provides a highly efficient cooling mechanism for reducing the maximum column temperature. In-tank modeling results revealed that an idealized hemispherical mound …
Date:
December 20, 2012
Creator:
Lee, Si Y. & King, William D.
System:
The UNT Digital Library
Charge Pump Detector: Optimization with Process and Device Simulation
None
Date:
December 18, 2012
Creator:
Segal, Julie D. & Kenney, Christopher J.
System:
The UNT Digital Library
S-Band Sheet Beam Klystron Research and Development at SLAC
None
Date:
December 17, 2012
Creator:
Jensen, Aaron; Fazio, Michael V.; Haase, Andrew; Jongewaard, Erik N.; Martin, David W.; Neilson, Jeffrey et al.
System:
The UNT Digital Library
CORROSION ISSUES ASSOCIATED WITH AUSTENITIC STAINLESS STEEL COMPONENTS USED IN NUCLEAR MATERIALS EXTRACTION AND SEPARATION PROCESSES
This paper illustrated the magnitude of the systems, structures and components used at the Savannah River Site for nuclear materials extraction and separation processes. Corrosion issues, including stress corrosion cracking, pitting, crevice corrosion and other corrosion induced degradation processes are discussed and corrosion mitigation strategies such as a chloride exclusion program and corrosion release testing are also discussed.
Date:
December 17, 2012
Creator:
Mickalonis, J.; Louthan, M. & Sindelar, R.
System:
The UNT Digital Library
Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
None
Date:
December 14, 2012
Creator:
Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J.; Barbiellini, G. et al.
System:
The UNT Digital Library
Effect of Thermal Anneal on Growth Behavior of Laser-Induced Damage Sites on the Exit Surface of Fused Silica
None
Date:
December 14, 2012
Creator:
Raman, R N; Negres, R A; Matthews, M J & Carr, C W
System:
The UNT Digital Library
Fundamental Physics at the Intensity Frontier
None
Date:
December 14, 2012
Creator:
Hewett, J. L.; Weerts, H.; Brock, R.; Butler, J. N.; Casey, B. C. K.; Collar, J. et al.
System:
The UNT Digital Library
Halo-to-Halo Similarity and Scatter in the Velocity Distribution of Dark Matter
Examines the velocity distribution function (VDF) in dark matter halos from milky way to cluster mass scales.
Date:
December 14, 2012
Creator:
Mao, Yao-Yuan; Strigari, Louis E.; Wechsler, Risa H.; Wu, Hao-Yi & Hahn, Oliver
System:
The UNT Digital Library
Systematic Uncertainties in NLO PS Matching
None
Date:
December 14, 2012
Creator:
Schonherr, Marek; Hoeche, Stefan; Krauss, Frank & Siegert, Frank
System:
The UNT Digital Library
Uncertainties in NLO + Parton Shower Matched Simulations of Inclusive Jet and Dijet Production
None
Date:
December 14, 2012
Creator:
Hoeche, Stefan & Schonherr, Marek
System:
The UNT Digital Library
W+n-jet Predictions at NLO Matched with a Parton Shower
None
Date:
December 14, 2012
Creator:
Siegert, Frank; Hoeche, Stefan; Krauss, Frank & Schonherr, Marek
System:
The UNT Digital Library
A Best Fit Approach to Estimating Multiple Diffuse Source Terms Using Ambient Air Monitoring Data and an Air Dispersion Model
None
Date:
December 13, 2012
Creator:
MacQueen, D. H.; Bertoldo, N. A. & Wegrecki, A. M.
System:
The UNT Digital Library
The Birth of a Galaxy: Primordial Metal Enrichment and Stellar Populations
None
Date:
December 13, 2012
Creator:
Wise, John H.; Turk, Matthew J.; Norman, Michael L.; Abel, Tom & /KIPAC, Menlo Park
System:
The UNT Digital Library
Branching Fraction and Form-factor Shape Measurements of Exclusive Charmless Semileptonic B Decays, and Determination of |Vub|
None
Date:
December 13, 2012
Creator:
Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A. et al.
System:
The UNT Digital Library
A Demonstration of the Disposal Systems Evaluation Framework (DSEF)
None
Date:
December 13, 2012
Creator:
Greenberg, H. R.; Blink, J. A.; Sharma, M. & Sutton, M.
System:
The UNT Digital Library