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National Security Letters: Proposed Amendments in the 111th Congress
This report includes a chart comparing the provisions of the bills and current law. It also reprints the text of the five National Security Letters (NSL) statutes as they now appear and as they appeared prior to amendment by the USA PATRIOT Act (to which form they would have returned under some of the bills).
Date:
December 21, 2009
Creator:
Doyle, Charles
Object Type:
Report
System:
The UNT Digital Library
Natural Outlook, Winter 2009
Monthly newsletter discussing environmental issues and policies in Texas. This issue includes the articles, "A Long Road to Remediation," "A New Cover for Closed Landfills," "Home Invasion," "More Services Move Online," and "Light Switch Around the Corner."
Date:
Winter 2009
Creator:
Texas Commission on Environmental Quality
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Nuclear Recoil Cross Sections from Time-dependent Studies of Two-Photon Double Ionization of Helium
We examine the sensitivity of nuclear recoil cross sections produced by two-photon double ionization of helium to the underlying triple differential cross sections (TDCS) used in their computation. We show that this sensitivity is greatest in the energy region just below the threshold for sequential double ionization. Accurate TDCS, extracted from non-perturbative solutions of the time-dependent Schroedinger equation, are used here in new computations of the nuclear recoil cross section.
Date:
December 21, 2009
Creator:
Horner, Daniel A.; Rescigno, Thomas N. & McCurdy, C. William
Object Type:
Article
System:
The UNT Digital Library
Panhandle Water News, Special Edition [2009]
Quarterly newsletter of the Panhandle Groundwater Conservation District discussing the news, activities, and events of the organization and other information related to water in Texas.
Date:
Winter 2009
Creator:
Panhandle Groundwater Conservation District
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Products of the Benzene + O(3P) Reaction
The gas-phase reaction of benzene with O(3P) is of considerable interest for modeling of aromatic oxidation, and also because there exist fundamental questions concerning the prominence of intersystem crossing in the reaction. While its overall rate constant has been studied extensively, there are still significant uncertainties in the product distribution. The reaction proceeds mainly through the addition of the O atom to benzene, forming an initial triplet diradical adduct, which can either dissociate to form the phenoxy radical and H atom, or undergo intersystem crossing onto a singlet surface, followed by a multiplicity of internal isomerizations, leading to several possible reaction products. In this work, we examined the product branching ratios of the reaction between benzene and O(3P) over the temperature range of 300 to 1000 K and pressure range of 1 to 10 Torr. The reactions were initiated by pulsed-laser photolysis of NO2 in the presence of benzene and helium buffer in a slow-flow reactor, and reaction products were identified by using the multiplexed chemical kinetics photoionization mass spectrometer operating at the Advanced Light Source (ALS) of Lawrence Berkeley National Laboratory. Phenol and phenoxy radical were detected and quantified. Cyclopentadiene and cyclopentadienyl radical were directly identified for the first …
Date:
December 21, 2009
Creator:
Taatjes, Craig A.; Osborn, David L.; Selby, Talitha M.; Meloni, Giovanni; Trevitt, Adam J.; Epifanovsky, Evgeny et al.
Object Type:
Article
System:
The UNT Digital Library
Rio Blanco, Colorado, Long-Term Hydrologic Monitoring Program Sampling and Analysis Results for 2009
The U.S. Department of Energy (DOE) Office of Legacy Management conducted annual sampling at the Rio Blanco, Colorado, Site, for the Long-Term Hydrologic Monitoring Program (LTHMP) on May 13 and 14, 2009. Samples were analyzed by the U.S. Environmental Protection Agency (EPA) Radiation&Indoor Environments National Laboratory in Las Vegas, Nevada. Samples were analyzed for gamma-emitting radionuclides by high-resolution gamma spectroscopy and tritium using the conventional and enriched methods.
Date:
December 21, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Semantic-Aware Automatic Parallelization of Modern Applications Using High-Level Abstractions
Automatic introduction of OpenMP for sequential applications has attracted significant attention recently because of the proliferation of multicore processors and the simplicity of using OpenMP to express parallelism for shared-memory systems. However, most previous research has only focused on C and Fortran applications operating on primitive data types. Modern applications using high-level abstractions, such as C++ STL containers and complex user-defined class types, are largely ignored due to the lack of research compilers that are readily able to recognize high-level object-oriented abstractions and leverage their associated semantics. In this paper, we use a source-to-source compiler infrastructure, ROSE, to explore compiler techniques to recognize high-level abstractions and to exploit their semantics for automatic parallelization. Several representative parallelization candidate kernels are used to study semantic-aware parallelization strategies for high-level abstractions, combined with extended compiler analyses. Preliminary results have shown that semantics of abstractions can help extend the applicability of automatic parallelization to modern applications and expose more opportunities to take advantage of multicore processors.
Date:
December 21, 2009
Creator:
Liao, C; Quinlan, D J; Willcock, J J & Panas, T
Object Type:
Article
System:
The UNT Digital Library
Spectrophotometric and Calorimetric Studies of Np(V) Complexation with Acetate at Variable Temperatures (T = 283 - 343 K)
Spectrophotometric titrations were performed to identify the Np(V)/acetate complex and determine the equilibrium constants at variable temperatures (T = 283 - 343 K) and at the ionic strength of 1.05 mol {center_dot} kg{sup -1}. The enthalpy of complexation at corresponding temperatures was determined by microcalorimetric titrations. Results show that the complexation of Np(V) with acetate is weak but strengthened as the temperature is increased. The complexation is endothermic and is entropy-driven. The enhancement of the complexation at elevated temperatures is primarily due to the increasingly larger entropy gain when the solvent molecules are released from the highly-ordered solvation spheres of NpO{sub 2}{sup +} and acetate to the bulk solvent where the degree of disorder is higher at higher temperatures.
Date:
December 21, 2009
Creator:
Rao, Linfeng; Tian, Guoxin; Srinivasan, Thandankorai G.; Zanonato, PierLuigi & Di Bernardo, Plinio
Object Type:
Article
System:
The UNT Digital Library
Spectroscopic signatures of proton transfer dynamics in the water dimer cation
Using full dimensional EOM-IP-CCSD/aug-cc-pVTZ potential energy surfaces, the photoelectron spectrum, vibrational structure, and ionization dynamics of the water dimer radical cation, (H2O)+2, were computed. We also report an experimental photoelectron spectrum which is derived from photoionization efficiency measurements and compares favorably with the theoretical spectrum. The vibrational structure is also compared with the recent experimental work of Gardenier et al. [J. Phys. Chem. A 113, 4772 (2009)] and the recent theoretical calculations by Cheng et al. [J. Phys. Chem. A 113 13779 (2009)]. A reduced dimensionality nuclear Hamiltonian was used to compute the ionization dynamics for both the ground state and first excited state of the cation. The dynamics show markedly different behavior and spectroscopic signatures depending on which state of the cation is accessed by the ionization. Ionization to the ground-state cation surface induces a hydrogen transfer which is complete within 50 femtoseconds, whereas ionization to the first excited state results in a much slower process.
Date:
December 21, 2009
Creator:
Kamarchik, Eugene; Kostko, Oleg; Bowman, Joel M.; Ahmed, Musahid & Krylov, Anna I.
Object Type:
Article
System:
The UNT Digital Library
Symmetry, Optical Properties and Thermodynamics of Neptunium(V) Complexes
Recent results on the optical absorption and symmetry of the Np(V) complexes with dicarboxylate and diamide ligands are reviewed. The importance of recognizing the 'silent' feature of centrosymmetric Np(V) species in analyzing the absorption spectra and calculating the thermodynamic constants of Np(V) complexes is emphasized.
Date:
December 21, 2009
Creator:
Rao, Linfeng & Tian, Guoxin
Object Type:
Article
System:
The UNT Digital Library
Texas Diabetes, Winter 2009
Quarterly newsletter providing information on diabetes health care and resources in Texas.
Date:
Winter 2009
Creator:
Texas Diabetes Program
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas International Law Journal, Volume 45, Number 2, Winter 2009
Journal containing "academic articles, essays, and student notes in the areas of public and private international law, international legal theory, the law of international organizations, comparative and foreign law, and domestic laws with significant international implications" (p. ii). This journal issue covers protocol I against world terrorism, offshore financial intermediation, Foreign Trade Antitrust Improvement Act, and Sotomayor and the Future of International Law.
Date:
Winter 2009
Creator:
University of Texas at Austin. School of Law.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Vital Statistics Today, Volume 12, Number 1, Winter 2009
Newsletter of the Texas Bureau of Vital Statistics discussing news and events related to the agency, as well as legislative updates and other information related to the Bureau's work.
Date:
Winter 2009
Creator:
Texas. Bureau of Vital Statistics.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Water for Texas, Volume 14, Number 1, Winter 2009
Quarterly publication of the Texas Water Development Board discussing activities of the organization and other relevant information about water conservation and resources in Texas.
Date:
Winter 2009
Creator:
Texas Water Development Board
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Water for Texas, Volume 19, Number 1, Winter 2009
Quarterly publication of the Texas Water Development Board discussing activities of the organization and other relevant information about water conservation and resources in Texas.
Date:
Winter 2009
Creator:
Texas Water Development Board
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Masters Thesis- Criticality Alarm System Design Guide with Accompanying Alarm System Development for the Radioisotope Production Laboratory in Richland, Washington
A detailed instructional manual was created to guide criticality safety engineers through the process of designing a criticality alarm system (CAS) for Department of Energy (DOE) hazard class 1 and 2 facilities. Regulatory and technical requirements were both addressed. A list of design tasks and technical subtasks are thoroughly analyzed to provide concise direction for how to complete the analysis. An example of the application of the design methodology, the Criticality Alarm System developed for the Radioisotope Production Laboratory (RPL) of Richland, Washington is also included. The analysis for RPL utilizes the Monte Carlo code MCNP5 for establishing detector coverage in the facility. Significant improvements to the existing CAS were made that increase the reliability, transparency, and coverage of the system.
Date:
December 20, 2009
Creator:
Greenfield, Bryce A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analysis of HLA-DP association with beryllium disease susceptibility in pooled exposed populations
Berylliosis or Chronic Beryllium Disease is a chronic granulomatous disorder primarily involving the lung associated with the exposition to low doses of Beryllium (Be) in the workplace. Berylliosis risk has been associated with the presence of a glutamate at position 69 of the HLA-DP beta chain (HLA-DPbetaGlu69) that is expressed in about 97% of disease cases and in 27% of the unaffected Be-exposed controls (p<0.0001) (Richeldi et al. Science 1993; 262: 242-244.12). Since this first observation of an immunogenetic association between berylliosis and HLA-DPbetaGlu69 a number of studies have confirmed the role of this marker as the primary gene of susceptibility of berylliosis (Richeldi et al Am J Ind Med. 1997; 32:337-40; Wang et al J. Immunol. 1999; 163: 1647-53; Saltini et al Eur Respir J. 2001 18:677-84; Rossman et al Am J Respir Crit Care Med. 2002 165:788-94). Moreover, a structure/function interaction between HLA-DP molecules carrying Glu69 and beryllium in driving and developing the immune response against beryllium itself has been observed as: (1) Be-specific T-cells clones obtained from berylliosis patients recognize beryllium as antigen only when presented in the context of the HLA-DP{beta}Glu69 molecules but not in the context of HLA-DP allelic variants carrying Lys69 (Lombardi G et …
Date:
December 19, 2009
Creator:
Cesare Saltini, Massimo Amicosante
Object Type:
Report
System:
The UNT Digital Library
Beam dynamics of the Neutralized Drift Compression Experiment-II (NDCX-II),a novel pulse-compressing ion accelerator
Intense beams of heavy ions are well suited for heating matter to regimes of emerging interest. A new facility, NDCX-II, will enable studies of warm dense matter at {approx}1 eV and near-solid density, and of heavy-ion inertial fusion target physics relevant to electric power production. For these applications the beam must deposit its energy rapidly, before the target can expand significantly. To form such pulses, ion beams are temporally compressed in neutralizing plasma; current amplification factors of {approx}50-100 are routinely obtained on the Neutralized Drift Compression Experiment (NDCX) at LBNL. In the NDCX-II physics design, an initial non-neutralized compression renders the pulse short enough that existing high-voltage pulsed power can be employed. This compression is first halted and then reversed by the beam's longitudinal space-charge field. Downstream induction cells provide acceleration and impose the head-to-tail velocity gradient that leads to the final neutralized compression onto the target. This paper describes the discrete-particle simulation models (1-D, 2-D, and 3-D) employed and the space-charge-dominated beam dynamics being realized.
Date:
December 19, 2009
Creator:
Friedman, A.; Barnard, J. J.; Cohen, R. H.; Grote, D. P.; Lund, S. M.; Sharp, W. M. et al.
Object Type:
Report
System:
The UNT Digital Library
Considering value of information when using CFD in design
This thesis presents an approach to find lower resolution CFD models that can accurately lead a designer to a correct decision at a lower computational cost. High-fidelity CFD models often contain too much information and come at a higher computational cost, limiting the designs a designer can test and how much optimization can be performed on the design. Lower model resolution is commonly used to reduce computational time. However there are no clear guidelines on how much model accuracy is required. Instead experience and intuition are used to select an appropriate lower resolution model. This thesis presents an alternative to this ad hoc method by considering the added value of the addition information provided by increasing accurate and more computationally expensive models.
Date:
December 19, 2009
Creator:
Misra, John Satprim
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluation of bisphenol E cyanate ester for the resin-injection repair of advanced composites
This thesis is a compilation of a general introduction and literature review that ties together the subsequent chapters which consist of two journal articles that have yet to be submitted for publication. The overall topic relates to the evaluation and application of a new class of cyanate ester resin with unique properties that lend it applicable to use as a resin for injection repair of high glass transition temperature polymer matrix composites. The first article (Chapter 2) details the evaluation and optimization of adhesive properties of this cyanate ester and alumina nanocomposites under different conditions. The second article (Chapter 3) describes the development and evaluation of an injection repair system for repairing delaminations in polymer matrix composites.
Date:
December 19, 2009
Creator:
Lio, Wilber Yaote
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
SAVANNAH RIVER SITE TANK 18 AND TANK 19 WALL SAMPLER PERFORMANCE
A sampling tool was required to evaluate residual activity ({mu}Curies per square foot) on the inner wall surfaces of underground nuclear waste storage tanks. The tool was required to collect a small sample from the 3/8 inch thick tank walls. This paper documents the design, testing, and deployment of the remotely operated sampling device. The sampler provides material from a known surface area to estimate the overall surface contamination in the tank prior to closure. The sampler consisted of a sampler and mast assembly mast assembly, control system, and the sampler, or end effector, which is defined as the operating component of a robotic arm. The mast assembly consisted of a vertical 30 feet long, 3 inch by 3 inch, vertical steel mast and a cantilevered arm hinged at the bottom of the mast and lowered by cable to align the attached sampler to the wall. The sampler and mast assembly were raised and lowered through an opening in the tank tops, called a riser. The sampler is constructed of a mounting plate, a drill, springs to provide a drive force to the drill, a removable sampler head to collect the sample, a vacuum pump to draw the sample from …
Date:
December 19, 2009
Creator:
Leishear, R.; Thaxton, D.; Minichan, R.; France, T.; Steeper, T.; Corbett, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Terrorist Attacks in Mumbai, India, and Implications for U.S. Interests
None
Date:
December 19, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
X-ray resonant magnetic scattering investigations of hexagonal multiferroics RMnO3 (R = Dy, Ho, Er)
Electricity and magnetism were unified into a common subject by James Clerk Maxwell in the nineteenth century yielding the electromagnetic theory. Four equations govern the dynamics of electric charges and magnetic fields, commonly known as Maxwell's equations. Maxwell's equations demonstrate that an accelerated charged particle can produce magnetic fields and a time varying magnetic field can induce a voltage - thereby linking the two phenomena. However, in solids, electric and magnetic ordering are most often considered separately and usually with good reason: the electric charges of electrons and ions are responsible for the charge effects, whereas the electron spin governs magnetic properties.
Date:
December 19, 2009
Creator:
Nandi, Shibabrata
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
2009 Exploring Giant Planets on NIF: A New Generation of Condensed Matter Workshop
None
Date:
December 18, 2009
Creator:
Eggert, J. H.; Robey, H. F.; Spears, B. K.; Thomas, C. A.; Weber, S. V.; Wilson, D. C. et al.
Object Type:
Article
System:
The UNT Digital Library