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Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes (open access)

Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes

The diffuse galactic {gamma}-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess {gamma}-ray emission {ge}1 GeV relative to diffuse galactic {gamma}-ray emission models consistent with directly measured CR spectra (the so-called 'EGRET GeV excess'). The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse {gamma}-ray emission with improved sensitivity and resolution compared to EGRET. We report on LAT measurements for energies 100 MeV to 10 GeV and galactic latitudes 10{sup o} {le} |b| {le} 20{sup o}. The LAT spectrum for this region of the sky is well reproduced by a diffuse galactic {gamma}-ray emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.
Date: April 11, 2012
Creator: Abdo, A. A.; Ackermann, M.; Ajello, M.; Anderson, B.; Atwood, W. B.; Axelsson, M. et al.
Object Type: Article
System: The UNT Digital Library
SiD Letter of Intent (open access)

SiD Letter of Intent

This document presents the current status of the Silicon Detector (SiD) effort to develop an optimized design for an experiment at the International Linear Collider. It presents detailed discussions of each of SiD's various subsystems, an overview of the full GEANT4 description of SiD, the status of newly developed tracking and calorimeter reconstruction algorithms, studies of subsystem performance based on these tools, results of physics benchmarking analyses, an estimate of the cost of the detector, and an assessment of the detector R and D needed to provide the technical basis for an optimised SiD.
Date: April 11, 2012
Creator: Aihara, H.; Burrows, P.; Oreglia, M.; Berger, E. L.; Guarino, V.; Repond, J. et al.
Object Type: Report
System: The UNT Digital Library
The Lord's Resistance Army: The U.S. Response (open access)

The Lord's Resistance Army: The U.S. Response

A history of the Lord's Resistance Army, which is led by Joseph Kony, and the U.S.A. policies regarding it.
Date: April 11, 2012
Creator: Arieff, Alexis & Ploch, Lauren
Object Type: Report
System: The UNT Digital Library
U.S. Energy: Overview and Key Statistics (open access)

U.S. Energy: Overview and Key Statistics

Energy supplies and prices are major economic factors in the United States, and energy markets are volatile and unpredictable. Thus, energy policy has been a recurring issue for Congress since the first major crisis in the 1970s. As an aid in policy making, this report presents a current and historical view of the supply and consumption of various forms of energy.
Date: April 11, 2012
Creator: Behrens, Carl E. & Glover, Carol
Object Type: Report
System: The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 112, No. 261, Ed. 1 Wednesday, April 11, 2012 (open access)

The Altus Times (Altus, Okla.), Vol. 112, No. 261, Ed. 1 Wednesday, April 11, 2012

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: April 11, 2012
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
Comptroller Susan Combs Distributes $489 Million in Monthly Sales Tax Revenue to Local Governments (open access)

Comptroller Susan Combs Distributes $489 Million in Monthly Sales Tax Revenue to Local Governments

This document provides information on the distributions of $489 million in monthly sales tax revenue to local governments.
Date: April 11, 2012
Creator: Combs, Susan
Object Type: Book
System: The Portal to Texas History
2011 Computation Directorate Annual Report (open access)

2011 Computation Directorate Annual Report

From its founding in 1952 until today, Lawrence Livermore National Laboratory (LLNL) has made significant strategic investments to develop high performance computing (HPC) and its application to national security and basic science. Now, 60 years later, the Computation Directorate and its myriad resources and capabilities have become a key enabler for LLNL programs and an integral part of the effort to support our nation's nuclear deterrent and, more broadly, national security. In addition, the technological innovation HPC makes possible is seen as vital to the nation's economic vitality. LLNL, along with other national laboratories, is working to make supercomputing capabilities and expertise available to industry to boost the nation's global competitiveness. LLNL is on the brink of an exciting milestone with the 2012 deployment of Sequoia, the National Nuclear Security Administration's (NNSA's) 20-petaFLOP/s resource that will apply uncertainty quantification to weapons science. Sequoia will bring LLNL's total computing power to more than 23 petaFLOP/s-all brought to bear on basic science and national security needs. The computing systems at LLNL provide game-changing capabilities. Sequoia and other next-generation platforms will enable predictive simulation in the coming decade and leverage industry trends, such as massively parallel and multicore processors, to run petascale applications. …
Date: April 11, 2012
Creator: Crawford, D. L.
Object Type: Report
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, April 11, 2012 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, April 11, 2012

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: April 11, 2012
Creator: DeSilver, Debi
Object Type: Newspaper
System: The Gateway to Oklahoma History
Detention of U.S. Persons as Enemy Belligerents (open access)

Detention of U.S. Persons as Enemy Belligerents

The detainee provisions passed as part of the National Defense Authorization Act for FY2012 affirm that the Authorization for Use of Military Force in response to the terrorist attacks of September 11, 2001, authorizes the detention of persons captured in connection with hostilities. This report provides a background to the legal issues presented, followed by a brief introduction to the law of war pertinent to the detention of different categories of individuals. An overview of U.S. practice during wartime to detain persons deemed dangerous to the national security is presented.
Date: April 11, 2012
Creator: Elsea, Jennifer K.
Object Type: Report
System: The UNT Digital Library
Reduction of Carbon Footprint and Energy Efficiency Improvement in Aluminum Production by Use of Novel Wireless Instrumentation Integrated with Mathematical Modeling (open access)

Reduction of Carbon Footprint and Energy Efficiency Improvement in Aluminum Production by Use of Novel Wireless Instrumentation Integrated with Mathematical Modeling

The work addressed the greenhouse gas emission and electrical energy consumption of the aluminum industry. The objective was to provide a means for reducing both through the application of wireless instrumentation, coupled to mathematical modeling. Worldwide the aluminum industry consumes more electrical energy than all activities in many major countries (e.g. the UK) and emits more greenhouse gasses (e.g. than France). Most of these excesses are in the 'primary production' of aluminum; that is the conversion of aluminum oxide to metal in large electrolytic cells operating at hundreds of thousands of amps. An industry-specific GHG emission has been the focus of the work. The electrolytic cells periodically, but at irregular intervals, experience an upset condition known as an 'anode effect'. During such anode effects the cells emit fluorinated hydrocarbons (PFCs, which have a high global warming potential) at a rate far greater than in normal operation. Therefore curbing anode effects will reduce GHG emissions. Prior work had indicated that the distribution of electrical current within the cell experiences significant shifts in the minutes before an anode effect. The thrust of the present work was to develop technology that could detect and report this early warning of an anode effect so …
Date: April 11, 2012
Creator: Evans, James W.
Object Type: Report
System: The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 97, No. 148, Ed. 1 Wednesday, April 11, 2012 (open access)

Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 97, No. 148, Ed. 1 Wednesday, April 11, 2012

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date: April 11, 2012
Creator: Gibbs, Angenene
Object Type: Newspaper
System: The Gateway to Oklahoma History
Cherokeean Herald (Rusk, Tex.), Vol. 163, No. 7, Ed. 1 Wednesday, April 11, 2012 (open access)

Cherokeean Herald (Rusk, Tex.), Vol. 163, No. 7, Ed. 1 Wednesday, April 11, 2012

Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date: April 11, 2012
Creator: Gonzalez, Terrie
Object Type: Newspaper
System: The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 99, No. 46, Ed. 1 Wednesday, April 11, 2012 (open access)

North Texas Daily (Denton, Tex.), Vol. 99, No. 46, Ed. 1 Wednesday, April 11, 2012

Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state, and campus news along with advertising.
Date: April 11, 2012
Creator: Gorman, Sean
Object Type: Newspaper
System: The Portal to Texas History
Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress (open access)

Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Some Members of Congress have expressed concern over U.S. acquisition of rare earth materials composed of rare earth elements used in various components of defense weapon systems. On March 13, 2012, President Obama announced that the United States had joined with Japan and the European Union to bring a World Trade Organization joint dispute resolution case against China because of China's restrictive policies on rare earths and other minerals. Congress may encourage DOD to develop a collaborative, long-term, well-thought-out strategy designed to identify any material weaknesses and vulnerabilities associated with rare earths and to protect long-term U.S. national security interests.
Date: April 11, 2012
Creator: Grasso, Valerie Bailey
Object Type: Report
System: The UNT Digital Library
Kuwait: Security, Reform, and U.S. Policy (open access)

Kuwait: Security, Reform, and U.S. Policy

Because of its location and close cooperation with the United States, Kuwait is central to U.S. efforts to remain engaged in the northern Persian Gulf region following the completion of the withdrawal of U.S. forces from Iraq at the end of 2011. Kuwait's ruling elites have been in a power struggle for nearly six years, but Kuwait has not faced the mass popular unrest that other governments throughout the Middle East have faced in 2011-2012.This report discusses Kuwait's relations with other countries in the Middle East.
Date: April 11, 2012
Creator: Katzman, Kenneth
Object Type: Report
System: The UNT Digital Library
Charge transport properties of CdMnTe radiation detectors (open access)

Charge transport properties of CdMnTe radiation detectors

Growth, fabrication and characterization of indium-doped cadmium manganese telluride (CdMnTe)radiation detectors have been described. Alpha-particle spectroscopy measurements and time resolved current transient measurements have yielded an average charge collection efficiency approaching 100 %. Spatially resolved charge collection efficiency maps have been produced for a range of detector bias voltages. Inhomogeneities in the charge transport of the CdMnTe crystals have been associated with chains of tellurium inclusions within the detector bulk. Further, it has been shown that the role of tellurium inclusions in degrading chargecollection is reduced with increasing values of bias voltage. The electron transit time was determined from time of flight measurements. From the dependence of drift velocity on applied electric field the electron mobility was found to be n = (718 55) cm2/Vs at room temperature.
Date: April 11, 2012
Creator: Kim, K.; Rafiel, R.; Boardman, M.; Reinhard, I.; Sarbutt, A.; Watt, G. et al.
Object Type: Report
System: The UNT Digital Library
Delta f Monte Carlo Calculation Of Neoclassical Transport In Perturbed Tokamaks (open access)

Delta f Monte Carlo Calculation Of Neoclassical Transport In Perturbed Tokamaks

Non-axisymmetric magnetic perturbations can fundamentally change neoclassical transport in tokamaks by distorting particle orbits on deformed or broken flux surfaces. This so-called non-ambipolar transport is highly complex, and eventually a numerical simulation is required to achieve its precise description and understanding. A new delta#14;f particle code (POCA) has been developed for this purpose using a modi ed pitch angle collision operator preserving momentum conservation. POCA was successfully benchmarked for neoclassical transport and momentum conservation in axisymmetric con guration. Non-ambipolar particle flux is calculated in the non-axisymmetric case, and results show a clear resonant nature of non-ambipolar transport and magnetic braking. Neoclassical toroidal viscosity (NTV) torque is calculated using anisotropic pressures and magnetic fi eld spectrum, and compared with the generalized NTV theory. Calculations indicate a clear #14;B2 dependence of NTV, and good agreements with theory on NTV torque pro les and amplitudes depending on collisionality.
Date: April 11, 2012
Creator: Kimin Kim, Jong-Kyu Park, Gerrit Kramer and Allen H. Boozer
Object Type: Report
System: The UNT Digital Library

Senior Recital:2012-04-11 - William Kremer, cello

Access: Use of this item is restricted to the UNT Community
A senior recital presented at the UNT College of Music Recital Hall.
Date: April 11, 2012
Creator: Kremer, William
Object Type: Sound
System: The UNT Digital Library
Amplitude Analysis and Measurement of the Time-dependent CP Asymmetry of B0 to KsKsKs Decays (open access)

Amplitude Analysis and Measurement of the Time-dependent CP Asymmetry of B0 to KsKsKs Decays

We present the first results on the Dalitz-plot structure and improved measurements of the time-dependent CP-violation parameters of the process B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} obtained using 468 x 10{sup 6} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. The Dalitz-plot structure is probed by a time-integrated amplitude analysis that does not distinguish between B{sup 0} and {bar B}{sup 0} decays. We measure the total inclusive branching fraction {Beta}(B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0}) = (6.19 {+-} 0.48 {+-} 0.15 {+-} 0.12) x 10{sup -6}, where the first uncertainty is statistical, the second is systematic, and the third represents the Dalitz-plot signal model dependence. We also observe evidence for the intermediate resonant states f{sub 0}(980), f{sub 0}(1710), and f{sub 2}(2010). Their respective product branching fractions are measured to be (2.70{sub -1.19}{sup +1.25} {+-} 0.36 {+-} 1.17) x 10{sup -6}, (0.50{sub -0.24}{sup +0.46} {+-} 0.04 {+-} 0.10) x 10{sup -6}, and (0.54{sub -0.20}{sup +0.21} {+-} 0.03 {+-} 0.52) x 10{sup -6}. Additionally, we determine the mixing-induced CP-violation parameters to be S = -0.94{sub -0.21}{sup +0.24} {+-} 0.06 and C = -0.17 {+-} 0.18 {+-} …
Date: April 11, 2012
Creator: Lees, J. P.
Object Type: Article
System: The UNT Digital Library
Mesoscale Benchmark Demonstration Problem 1: Mesoscale Simulations of Intra-granular Fission Gas Bubbles in UO2 under Post-irradiation Thermal Annealing (open access)

Mesoscale Benchmark Demonstration Problem 1: Mesoscale Simulations of Intra-granular Fission Gas Bubbles in UO2 under Post-irradiation Thermal Annealing

A study was conducted to evaluate the capabilities of different numerical methods used to represent microstructure behavior at the mesoscale for irradiated material using an idealized benchmark problem. The purpose of the mesoscale benchmark problem was to provide a common basis to assess several mesoscale methods with the objective of identifying the strengths and areas of improvement in the predictive modeling of microstructure evolution. In this work, mesoscale models (phase-field, Potts, and kinetic Monte Carlo) developed by PNNL, INL, SNL, and ORNL were used to calculate the evolution kinetics of intra-granular fission gas bubbles in UO2 fuel under post-irradiation thermal annealing conditions. The benchmark problem was constructed to include important microstructural evolution mechanisms on the kinetics of intra-granular fission gas bubble behavior such as the atomic diffusion of Xe atoms, U vacancies, and O vacancies, the effect of vacancy capture and emission from defects, and the elastic interaction of non-equilibrium gas bubbles. An idealized set of assumptions was imposed on the benchmark problem to simplify the mechanisms considered. The capability and numerical efficiency of different models are compared against selected experimental and simulation results. These comparisons find that the phase-field methods, by the nature of the free energy formulation, are …
Date: April 11, 2012
Creator: Li, Yulan; Hu, Shenyang Y.; Montgomery, Robert; Gao, Fei; Sun, Xin; Tonks, Michael et al.
Object Type: Report
System: The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 97, No. 135, Ed. 1 Wednesday, April 11, 2012 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 97, No. 135, Ed. 1 Wednesday, April 11, 2012

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: April 11, 2012
Creator: Lusk, Chris
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Colony Courier-Leader (The Colony, Tex.), Vol. 31, No. 11, Ed. 1 Wednesday, April 11, 2012 (open access)

The Colony Courier-Leader (The Colony, Tex.), Vol. 31, No. 11, Ed. 1 Wednesday, April 11, 2012

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date: April 11, 2012
Creator: Mann, Rick
Object Type: Newspaper
System: The Portal to Texas History
Yoakum Herald-Times (Yoakum, Tex.), Vol. 120, No. 15, Ed. 1 Wednesday, April 11, 2012 (open access)

Yoakum Herald-Times (Yoakum, Tex.), Vol. 120, No. 15, Ed. 1 Wednesday, April 11, 2012

Weekly newspaper from Yoakum, Texas that includes local, state, and national news along with advertising.
Date: April 11, 2012
Creator: McCracken, Michael S.
Object Type: Newspaper
System: The Portal to Texas History
Oral History Interview with Glenn E. Neff, April 11, 2012 transcript

Oral History Interview with Glenn E. Neff, April 11, 2012

The National Museum of the Pacific War presents an oral interview with Glenn E. Neff. After Neff finished high school, he entered the service in March, 1945. Neff discusses several anecdotes about his training days at Camp Robinson, Arkansas. While he was training, the war in Europe ended. Neff headed for the Pacific and contracted pneumonia aboard the troopship and spent most of his time on the voyage in sick bay. En route to the Philippines, the atomic bombs were dropped and the war ended. Neff's group went on to Leyte and he describes his impressions of camp life near Tacloban. While there, Neff recalls participating in some mopping-up operations, and pulling guard duty to a Japanese prison stockade. After several months in the Philippines, Neff was transferred up to Guam. At Guam, Neff encountered his high school algebra teacher and another classmate from back home. They toured the island together. Also on Guam, Neff put up a lot of communication wires in the coconut trees and laid cables underground. Neff left Guam and returned to the US for discharge in November, 1946.
Date: April 11, 2012
Creator: Neff, Glenn E.
Object Type: Sound
System: The Portal to Texas History