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Security and Prosperity Partnership of North America: An Overview and Selected Issues
The Security and Prosperity Partnership of North America (SPP) is a trilateral initiative that was launched in March 2005 for the purpose of increasing and enhancing security and prosperity in the United States, Canada, and Mexico. This initiative promoted communication and cooperation across several key policy areas of mutual interest, such as improving certain sectors of the economy, developing higher health and safety standards, and addressing environmental concerns. This report describes this initiative in brief detail, including summaries of several SPP-related meetings between the three countries' leaders.
Date:
May 27, 2009
Creator:
Villarreal, M. Angeles & Lake, Jennifer E.
Object Type:
Report
System:
The UNT Digital Library
Mine-Resistant, Ambush-Protected (MRAP) Vehicles: Background and Issues for Congress
In late 2007, the Department of Defense (DOD) launched a major procurement initiative to replace most uparmored High Mobility, Multi-Wheeled Vehicles (HMMWVs) in Iraq with Mine-Resistant, Ambush-Protected (MRAP) vehicles by FY2009. MRAPs have been described as providing significantly more protection against Improvised Explosive Devices (IEDs) than uparmored HMMWVs. DOD's decision to acquire a new, smaller MRAP variant for use in Afghanistan; MRAP mechanical, logistical, and readiness concerns could be potential policy issues for congressional consideration. This report will be updated.
Date:
April 27, 2009
Creator:
Feickert, Andrew
Object Type:
Report
System:
The UNT Digital Library
Time Reversal Violation
This talk briefly reviews three types of time-asymmetry in physics, which I classify as universal, macroscopic and microscopic. Most of the talk is focused on the latter, namely the violation of T-reversal invariance in particle physics theories. In sum tests of microscopic T-invariance, or observations of its violation, are limited by the fact that, while we can measure many processes, only in very few cases can we construct a matched pair of process and inverse process and observe it with sufficient sensitivity to make a test. In both the cases discussed here we can achieve an observable T violation making use of flavor tagging, and in the second case also using the quantum properties of an antisymmetric coherent state of two B mesons to construct a CP-tag. Both these tagging properties depend only on very general properties of the flavor and/or CP quantum numbers and so provide model independent tests for T-invariance violations. The microscopic laws of physics are very close to T-symmetric. There are small effects that give CP- and T-violating processes in three-generation-probing weak decays. Where a T-violating observable can be constructed we see the relationships between T-violation and CP-violation expected in a CPT conserving theory. These microscopic …
Date:
January 27, 2009
Creator:
Quinn, H.
Object Type:
Article
System:
The UNT Digital Library
FINAL REPORT DOE Grant: DE-FG02-89ER45391
The work reported here took place at the University of Minnesota from 07/01/1989 to 06/30/2006. Most of this work focused on computational materials applied to oxides during the first part of this funding period and to nanoscale materials toward the end of the funding period. This funding resulted in three monographs, 36 invited articles or book chapters, 160 articles in refereed journals and 89 invited talks. The funding helped train 13 PhD students and one masters student. The PI received two national research awards for this work. A list of these contributions are presented.
Date:
February 27, 2009
Creator:
Chelikowsky, James R.
Object Type:
Report
System:
The UNT Digital Library
CCN Spectral Measurements
Detailed aircraft measurements were made of cloud condensation nuclei (CCN) spectra associated with extensive cloud systems off the central California coast in the July 2005 MASE project. These measurements include the wide supersaturation (S) range (2-0.01%) that is important for these polluted stratus clouds. Concentrations were usually characteristic of continental/anthropogenic air masses. The most notable feature was the consistently higher concentrations above the clouds than below. CCN measurements are so important because they provide a link between atmospheric chemistry and cloud-climate effects, which are the largest climate uncertainty. Extensive comparisons throughout the eleven flights between two CCN spectrometers operated at different but overlapping S ranges displayed the precision and accuracy of these difficult spectral determinations. There are enough channels of resolution in these instruments to provide differential spectra, which produce more rigorous and precise comparisons than traditional cumulative presentations of CCN concentrations. Differential spectra are also more revealing than cumulative spectra. Only one of the eleven flights exhibited typical maritime concentrations. Average below cloud concentrations over the two hours furthest from the coast for the 8 flights with low polluted stratus was 614?233 at 1% S, 149?60 at 0.1% S and 57?33 at 0.04% S cm-3. Immediately above cloud average …
Date:
February 27, 2009
Creator:
Hudson, James G.
Object Type:
Report
System:
The UNT Digital Library
Molecular dissection of the roles of the SOD genes in mammalian response to low dose irradiation
“Molecular dissection of the roles of the SOD genes in mammalian response to low dose irradiation " was started on 09/01/03 and ended on 08/31/07. The primary objective of the project was to carry out mechanistic studies of the roles of the anti-oxidant SOD genes in mammalian cellular response to low dose ionizing radiation.
Date:
January 27, 2009
Creator:
Li, Dr. Chuan-Yaun
Object Type:
Text
System:
The UNT Digital Library
Final Technical Report
Bioremediation of radionuclides and metals in the subsurface necessitate an understanding of the metabolic capacities and interactions of the anaerobic microorganisms that are found there, including members of the sulfate-reducing bacteria (SRB). Genetic investigation into the pathway of reductant flow to U(VI) in the SRB belonging to the genus Desulfovibrio has been the focus of this project. In Dv. desulfuricans strain G20, we confirmed the importance of the tetraheme cytochrome c3 by disruption of the gene encoding that cytochrome, cycA, and demonstrated a decrease in the ability of the mutant (I2) to reduce U(VI). We found that the cytochrome c3 was necessary for electrons from pyruvate to reach sulfate or fumarate as terminal electron acceptors. It was not needed for electrons from lactate to reach sulfate, from which we infer that a different pathway is used for the electrons from these two substrates. Cyrstal structure of the tetraheme cytochrome c3 was obtained and site-directed mutations of the protein indicated a binding site for metals at heme 4 of the structure. Kinetic studies for oxidation of reduced cytochrome c3 with U(VI) or molybdate revealed a preference for U(VI) as a substrate. Evidence for a role for sodium gradients in the energetic …
Date:
February 27, 2009
Creator:
Wall, Judy D.
Object Type:
Report
System:
The UNT Digital Library
Fundamental Mechanistic Investigations of Silane and Chlorocarbon Addition to Low Valent Palladium Species and their Application to Catalysis
The collaboration between Mark Fink (Tulane University) and R. Morris Bullock (Brookhaven National Laboratory, currently at PNL) is an effort to understand some of the fundamental processes involved in catalytic bond activations with low coordinate palladium species. The project involves the photochemical generation of reactive low-valent palladium species as transients using nanosecond laser flash photolysis and the subsequent investigation of their reactions with chloroarenes and hydrosilanes. In the case of Si-H activation of hydrosilanes, relatively long-lived sigma complexes are implicated. These complexes may be important models for C-H activation in hydrocarbons. The information obtained from these studies will help in the understanding of fundamental processes involved in a number of important catalytic reactions in the petrochemical and environmental areas.
Date:
January 27, 2009
Creator:
Fink, Mark J.
Object Type:
Report
System:
The UNT Digital Library
FINAL REPORT (DE-FG02-97ER62338): Single-column modeling, GCM parameterizations, and ARM data
Our overall goal is the development of new and improved parameterizations of cloud-radiation effects and related processes, using ARM data at all three ARM sites, and the implementation and testing of these parameterizations in global models. To test recently developed prognostic parameterizations based on detailed cloud microphysics, we have compared SCM (single-column model) output with ARM observations at the SGP, NSA and TWP sites. We focus on the predicted cloud amounts and on a suite of radiative quantities strongly dependent on clouds, such as downwelling surface shortwave radiation. Our results demonstrate the superiority of parameterizations based on comprehensive treatments of cloud microphysics and cloud-radiative interactions. At the SGP and NSA sites, the SCM results simulate the ARM measurements well and are demonstrably more realistic than typical parameterizations found in conventional operational forecasting models. At the TWP site, the model performance depends strongly on details of the scheme, and the results of our diagnostic tests suggest ways to develop improved parameterizations better suited to simulating cloud-radiation interactions in the tropics generally. These advances have made it possible to take the next step and build on this progress, by incorporating our parameterization schemes in state-of-the-art three-dimensional atmospheric models, and diagnosing and evaluating …
Date:
February 27, 2009
Creator:
Somerville, Richard C. J.
Object Type:
Report
System:
The UNT Digital Library
Microbunching Instability in a Chicane: Two-Dimensional Mean Field Treatment
We study the microbunching instability in a bunch compressor by a parallel code with some improved numerical algorithms. The two-dimensional charge/current distribution is represented by a Fourier series, with coefficients determined through Monte Carlo sampling over an ensemble of tracked points. This gives a globally smooth distribution with low noise. The field equations are solved accurately in the lab frame using retarded potentials and a novel choice of integration variables that eliminates singularities. We apply the scheme with parameters for the first bunch compressor system of FERMI{at}Elettra, with emphasis on the amplification of a perturbation at a particular wavelength. Gain curves agree with those of the linearized Vlasov model at long wavelengths, but show some deviation at the smallest wavelengths treated.
Date:
January 27, 2009
Creator:
Bassi, G.; Ellison, James A.; Heinemann, Klaus & Warnock, Robert
Object Type:
Article
System:
The UNT Digital Library
The Greensheet (Houston, Tex.), Vol. 40, No. 356, Ed. 1 Thursday, August 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
August 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 613, Ed. 1 Tuesday, January 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
January 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 198, Ed. 1 Wednesday, May 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
May 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 457, Ed. 1 Tuesday, October 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
October 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 458, Ed. 1 Tuesday, October 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
October 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 46, Ed. 1 Friday, February 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
February 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 94, Ed. 1 Friday, March 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
March 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 39, No. 35, Ed. 1 Thursday, August 27, 2009
Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.
Date:
August 27, 2009
Creator:
Judson, Mary Henkel
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 39, No. 614, Ed. 1 Tuesday, January 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
January 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 514, Ed. 1 Friday, November 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
November 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 357, Ed. 1 Thursday, August 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
August 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 48, Ed. 1 Friday, February 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
February 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 516, Ed. 1 Friday, November 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
November 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 40, No. 96, Ed. 1 Friday, March 27, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
March 27, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History