A senior recital presented at the UNT College of Music Voertman Hall.

A letter report issued by the Government Accountability Office with an abstract that begins "Agencies use a risk-based approach, including workload and threat assessment data, to allocate resources, but most do not fully track those used for export control enforcement activities. As their missions are broader than export controls, agencies can use staff resources for other activities based on need, making tracking resources used solely for export control enforcement difficult. Only Commerce’s Office of Export Enforcement allocates its resources exclusively to export control enforcement as that is its primary mission. Other agencies, such as State and the Treasury, have relatively few export control enforcement staff to track. While several agencies acknowledge the need to better track export enforcement resources and have taken steps to do so, they do not know the full extent of their use of these resources and do not use this information in resource allocation decisions. In some cities, agencies are informally leveraging export enforcement resources through voluntarily created local task forces that bring together enforcement resources to work collectively on export control cases."

Testimony issued by the Government Accountability Office with an abstract that begins "GAO has reported on actions that the Department of Homeland Security (DHS) has taken to improve the security of the Visa Waiver Program; but, additional risks remain. In May 2011, GAO reported that DHS implemented the Electronic System for Travel Authorization (ESTA), required by the Implementing Recommendations of the 9/11 Commission Act of 2007 (9/11 Act), and took steps to minimize the burden associated with this requirement. DHS requires Visa Waiver Program travelers to submit biographical information and answers to eligibility questions through ESTA prior to travel. DHS made efforts to minimize the burden imposed by this requirement. For example, although travelers formerly filled out a Visa Waiver Program application form for each journey to the United States, ESTA approval is generally valid for 2 years. However, GAO reported that DHS had not fully evaluated security risks related to the small percentage of travelers without verified ESTA approval. In 2010, airlines complied with the requirement to verify ESTA approval for almost 98 percent of Visa Waiver Program passengers prior to boarding, but the remaining 2 percent—about 364,000 travelers—traveled under the program without verified ESTA approval. In May 2011, …

A letter report issued by the Government Accountability Office with an abstract that begins "U.S. agencies have adopted interagency guidance documents that establish PSI policies and procedures and have submitted annual reports; however, these reports do not contain expenditure data for all agencies as required by law. The agencies produced documents that contain general PSI policies and procedures. In addition, DOD and the Department of Homeland Security’s Customs and Border Protection (CBP) developed policies and procedures specifically to guide their agencies’ PSI activities. The annual reports submitted in 2009, 2010, and 2011 met requirements to describe PSI-related activities planned for future years and those that took place in the preceding year. Although the reports included an account of DOD’s PSI expenditures, they did not contain all expenditures for other agencies for PSI activities as required by law."

Testimony issued by the Government Accountability Office with an abstract that begins "Reliance on a global supply chain introduces multiple risks to federal information systems and underscores the importance of threat assessments and mitigation. Supply chain threats are present at various phases of a system’s development life cycle and could create an unacceptable risk to federal agencies. Key supply chain-related threats include"

A letter report issued by the Government Accountability Office with an abstract that begins "To collaborate with state and local law enforcement, the Federal Protective Service (FPS) uses memorandums of understanding (MOU), long-standing working relationships, written guidance to FPS staff, joint operations, and other initiatives. For example, FPS has MOUs ranging from sharing radio frequency usage in Alabama, to a mutual aid agreement with the Metropolitan Atlanta Rapid Transit Authority in Georgia. In some jurisdictions, such as the suburbs of the District of Columbia, FPS has no MOUs but has regular contact and long-standing mutual aid relationships with state and local law enforcement. To collaborate with state and local law enforcement, FPS has guidance that addresses issues such as the scope of law enforcement authorities on federal property and information sharing among jurisdictions. FPS established regional staff positions intended to improve collaboration with other organizations and has engaged in joint operations with state and local law enforcement. By comparison, other federal organizations with law enforcement responsibilities similar to FPS also use a variety of methods, ranging from the Department of Veterans Affairs’ policy to seek MOUs with state and local law enforcement to the Smithsonian Institution’s established relationships with the …

A letter report issued by the Government Accountability Office with an abstract that begins "Hypertension was the most commonly reported medical condition among adults that could result in a health insurer denying coverage, requiring higher-than-average premiums, or restricting coverage. GAO’s analysis found that about 33.2 million adults age 19-64 years old, or about 18 percent, reported hypertension in 2009. Individuals with hypertension reported average annual expenditures related to treating the condition of $650, but maximum reported expenditures were $61,540. Mental health disorders and diabetes were the second and third most commonly reported conditions among adults. Cancer was the condition with the highest average annual treatment expenditures—about $9,000."

Free weekly newspaper that includes business and classified advertising.

Free weekly newspaper that includes business and classified advertising.

The Magnetic Reconnection Experiment (MRX)[1] has been utilized to assess the effectiveness of minimum variance analysis on the magnetic field (MVAB) and boundary-crossing time analysis (BCTA). The neutral sheet is swept, or jogged, in a controlled manner with respect to the stationary probes by pulsed internal coil currents. Magnetic field data from measurement points resembling data from multi-spacecraft flying though a reconnecting current sheet is used to check both techniques to deduce a proper normal vector. We examine discharges with the two-dimensional (2-D) X-line structure as well as cases in which a flux rope forms within the layer. All discharges are in a two-fluid regime in which electrons are magnetized but not ions. Boundary-crossing time analysis with four sample measurement points forming a tetrahedron generates a reasonable unit normal vector and relative velocity along the normal vector for all of the tested cases. On the other hand, MVAB sometimes fails to predict a proper normal direction. This is because the X-line magnetic geometry is fundamentally 2-D or 3-D. However, the direction along the reconnecting field determined by MVAB does not deviate much from the real magnetic geometry documented by 2-D magnetic probe arrays and one additional probe at a different …

A resin slurry venting analysis was conducted to address safety issues associated with overpressurization of ion exchange columns used in the Purex process at the Savannah River Site (SRS). If flow to these columns were inadvertently interrupted, an exothermic runaway reaction could occur between the ion exchange resin and the nitric acid used in the feed stream. The nitric acid-resin reaction generates significant quantities of noncondensable gases, which would pressurize the column. To prevent the column from rupturing during such events, rupture disks are installed on the column vent lines. The venting analysis models accelerating rate calorimeter (ARC) tests and data from tests that were performed in a vented test vessel with a rupture disk. The tests showed that the pressure inside the test vessel continued to increase after the rupture disk opened, though at a slower rate than prior to the rupture. Calculated maximum discharge rates for the resin venting tests exceeded the measured rates of gas generation, so the vent size was sufficient to relieve the pressure in the test vessel if the vent flow rate was constant. The increase in the vessel pressure is modeled as a transient phenomenon associated with expansion of the resin slurry/gas mixture …

Friction Stir Extrusion (FSE) is a novel energy-efficient solid-state material synthesis and recycling technology capable of producing large quantity of bulk nano-engineered materials with tailored, mechanical, and physical properties. The novelty of FSE is that it utilizes the frictional heating and extensive plastic deformation inherent to the process to stir, consolidate, mechanically alloy, and convert the powders, chips, and other recyclable feedstock materials directly into useable product forms of highly engineered materials in a single step (see Figure 1). Fundamentally, FSE shares the same deformation and metallurgical bonding principles as in the revolutionary friction stir welding process. Being a solid-state process, FSE eliminates the energy intensive melting and solidification steps, which are necessary in the conventional metal synthesis processes. Therefore, FSE is highly energy-efficient, practically zero emissions, and economically competitive. It represents a potentially transformational and pervasive sustainable manufacturing technology for metal recycling and synthesis. The goal of this project was to develop the technological basis and demonstrate the commercial viability of FSE technology to produce the next generation highly functional electric cables for electricity delivery infrastructure (a multi-billion dollar market). Specific focus of this project was to (1) establish the process and material parameters to synthesize novel alloys such …

A fully variational, unstructured, electromagnetic particle-in-cell integrator is developed for integration of the Vlasov-Maxwell equations. Using the formalism of Discrete Exterior Calculus [1], the field solver, interpolation scheme and particle advance algorithm are derived through minimization of a single discrete field theory action. As a consequence of ensuring that the action is invariant under discrete electromagnetic gauge transformations, the integrator exactly conserves Gauss's law.

The goal of this project is to develop forensic genotyping assays for select agent viruses, addressing a significant capability gap for the viral bioforensics and law enforcement community. We used a multipronged approach combining bioinformatics analysis, PCR-enriched samples, microarrays and TaqMan assays to develop high resolution and cost effective genotyping methods for strain level forensic discrimination of viruses. We have leveraged substantial experience and efficiency gained through year 1 on software development, SNP discovery, TaqMan signature design and phylogenetic signature mapping to scale up the development of forensics signatures in year 2. In this report, we have summarized the Taqman signature development for South American hemorrhagic fever viruses, tick-borne encephalitis viruses and henipaviruses, Old World Arenaviruses, filoviruses, Crimean-Congo hemorrhagic fever virus, Rift Valley fever virus and Japanese encephalitis virus.

Currently, all H1616 shipping package containers undergo annual re-verification testing, including containment vessel leak testing to verify leak-tightness (<1 x 10{sup -7} ref cc/sec air) as per ANSI N14.5. The purpose of this literature review is to supplement aging studies currently being performed by SRNL on the EPDM O-rings to provide the technical basis for extending annual re-verification testing for the H1616 shipping package and to predict the life of the seals at bounding service conditions. The available data suggest that the EPDM O-rings can retain significant mechanical properties and sealing force at or below bounding service temperatures (169 F or 76 C) beyond the 1 year maintenance period. Interpretation of available data suggests that a service life of at least 2 years and potentially 4-6 years may be possible at bounding temperatures. Seal lifetimes at lower, more realistic temperatures will likely be longer. Being a hydrocarbon elastomer, EPDM O-rings may exhibit an inhibition period due to the presence of antioxidants. Once antioxidants are consumed, mechanical properties and seal performance could decline at a faster rate. Testing is being performed to validate the assumptions outlined in this report and to assess the long-term performance of O-ring seals under actual service …

We clarify a number of issues on Fayet-Iliopoulos (FI) terms in supergravity, keeping the formalism at a minimum and making use of explicit examples. We explain why, if the U(1) vector is massive everywhere in field space, FI terms are not genuine and can always be redefined away or introduced when they are not present. We formulate a simple anomaly-free model with a genuine FI term, a classically stable de Sitter (dS) vacuum and no global symmetries. We explore the relation between N = 2 and N = 1 FI terms by discussing N = 1 truncations of N = 2 models with classically stable dS vacua.

Maximizing the utility of upcoming photometric cluster surveys requires a thorough understanding of the richness-mass relation of galaxy clusters. We use Monte Carlo simulations to study the impact of various sources of observational scatter on this relation. Cluster ellipticity, photometric errors, photometric redshift errors, and cluster-to-cluster variations in the properties of red-sequence galaxies contribute negligible noise. Miscentering, however, can be important, and likely contributes to the scatter in the richness - mass relation of galaxy maxBCG clusters at the low mass end, where centering is more difficult. We also investigate the impact of projection effects under several empirically motivated assumptions about cluster environments. Using SDSS data and the maxBCG cluster catalog, we demonstrate that variations in cluster environments can rarely ({approx} 1%-5% of the time) result in significant richness boosts. Due to the steepness of the mass/richness function, the corresponding fraction of optically selected clusters that suffer from these projection effects is {approx} 5%-15%. We expect these numbers to be generic in magnitude, but a precise determination requires detailed, survey-specific modeling.

Transportation and storage of plutonium oxide is typically done using a convenience container to hold the oxide powder which is then placed inside a containment vessel. Intermediate containers which act as uncredited confinement barriers may also be used. The containment vessel is subject to an internal pressure due to several sources including; (1) plutonium oxide provides a heat source which raises the temperature of the gas space, (2) helium generation due to alpha decay of the plutonium, (3) hydrogen generation due to radiolysis of the water which has been adsorbed onto the plutonium oxide, and (4) degradation of plastic bags which may be used to bag out the convenience can from a glove box. The contributions of these sources are evaluated in a reasonably conservative manner.

Vectorization is data parallelism (SIMD, SIMT, etc.) - extension of ISA enabling the same instruction to be performed on multiple data items simultaeously. Many/most CPUs support vectorization in some form. Vectorization is difficult to enable, but can yield large efficiency gains. Extra programmer effort is required because: (1) not all algorithms can be vectorized (regular algorithm structure and fine-grain parallelism must be used); (2) most CPUs have data alignment restrictions for load/store operations (obey or risk incorrect code); (3) special directives are often needed to enable vectorization; and (4) vector instructions are architecture-specific. Vectorization is the best way to optimize for power and performance due to reduced clock cycles. When data is organized properly, a vector load instruction (i.e. movaps) can replace 'normal' load instructions (i.e. movsd). Vector operations can potentially have a smaller footprint in the instruction cache when fewer instructions need to be executed. Hybrid index sets insulate users from architecture specific details. We have applied hybrid index sets to achieve optimal vectorization. We can extend this concept to handle other programming models.

The image-current heating on the resistive beam chamber of a superconducting undulator (SCU) was calculated based on the normal and anomalous skin effects. Using the bulk resistivity of copper for the beam chamber, the heat loads were calculated for the residual resistivity ratios (RRRs) of unity at room temperature to 100 K at a cryogenic temperature as the reference. Then, using the resistivity of the specific aluminum alloy 6053-T5, which will be used for the SCU beam chamber, the heat loads were calculated. An electron beam stored in a storage ring induces an image current on the inner conducting wall, mainly within a skin depth, of the beam chamber. The image current, with opposite charge to the electron beam, travels along the chamber wall in the same direction as the electron beam. The average current in the storage ring consists of a number of bunches. When the pattern of the bunched beam is repeated according to the rf frequency, the beam current may be expressed in terms of a Fourier series. The time structure of the image current is assumed to be the same as that of the beam current. For a given resistivity of the chamber inner wall, the …

The overall goal of this project is to forensically characterize 100 unknown Burkholderia isolates in the US-Australia collaboration. We will identify genome-wide single nucleotide polymorphisms (SNPs) from B. pseudomallei and near neighbor species including B. mallei, B. thailandensis and B. oklahomensis. We will design microarray probes to detect these SNP markers and analyze 100 Burkholderia genomic DNAs extracted from environmental, clinical and near neighbor isolates from Australian collaborators on the Burkholderia SNP microarray. We will analyze the microarray genotyping results to characterize the genetic diversity of these new isolates and triage the samples for whole genome sequencing. In this interim report, we described the SNP analysis and the microarray probe design for the Burkholderia SNP microarray.

Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.

Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state, and campus news along with advertising.

Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.