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International Trade and Finance: Key Policy Issues for the 112th Congress
The 112th Congress, in both its legislative and oversight capacities, faces numerous international trade and finance issues. In addition to the broader congressional oversight of the economic and political context of the current U.S. participation in the global economy, this report highlights major international trade and finance issues Congress may address this year and next.
Date:
January 11, 2011
Creator:
Ahearn, Raymond J.
Object Type:
Report
System:
The UNT Digital Library
Highly Efficient Small Form Factor LED Retrofit Lamp: FInal Report
This report summarizes work to develop a high efficiency LED-based MR16 lamp downlight at OSRAM SYLVANIA under US Department of Energy contract DE-EE0000611. A new multichip LED package, electronic driver, and reflector optic were developed for these lamps. At steady-state, the lamp luminous flux was 409 lumens (lm), luminous efficacy of 87 lumens per watt (LPW), CRI (Ra) of 87, and R9 of 85 at a correlated color temperature (CCT) of 3285K. The LED alone achieved 120 lumens per watt efficacy and 600 lumen flux output at 25 C. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.90 at a power of only 5 watts. Compared to similar existing MR16 lamps using LED sources, these lamps had much higher efficacy and color quality. The objective of this work was to demonstrate a LED-based MR16 retrofit lamp for replacement of 35W halogen MR16 lamps having (1) luminous flux of 500 lumens, (2) luminous efficacy of 100 lumens per watt, (3) beam angle less than 40{sup o} and center beam candlepower of at least 1000 candelas, and (4) excellent color quality.
Date:
September 11, 2011
Creator:
Allen, Steven; Palmer, Fred & Li, Ming
Object Type:
Report
System:
The UNT Digital Library
Independent Confirmatory Survey Report for the University of Arizona Nuclear Reactor Laboratory, Tucson, Arizona
The University of Arizona (University) research reactor is a TRIGA swimming pool type reactor designed by General Atomics and constructed at the University in 1958. The reactor first went into operation in December of 1958 under U.S. Nuclear Regulatory Commission (NRC) license R-52 until final shut down on May 18, 2010. Initial site characterization activities were conducted in February 2009 during ongoing reactor operations to assess the radiological status of the Nuclear Reactor Laboratory (NRL) excluding the reactor tank, associated components, and operating systems. Additional post-shutdown characterization activities were performed to complete characterization activities as well as verify assumptions made in the Decommissioning Plan (DP) that were based on a separate activation analysis (ESI 2009 and WMG 2009). Final status survey (FSS) activities began shortly after the issuance of the FSS plan in May 2011. The contractor completed measurement and sampling activities during the week of August 29, 2011.
Date:
November 11, 2011
Creator:
Altic, Nick A.
Object Type:
Report
System:
The UNT Digital Library
AGN Unification at z ~ 1: u - R Colors and Gradients in X-ray AGN Hosts
None
Date:
July 11, 2011
Creator:
Ammons, S. M.; Rosario, D.; Koo, D.; Dutton, A.; Melbourne, J.; Max, C. et al.
Object Type:
Article
System:
The UNT Digital Library
Advanced High-Speed Framing Camera Development for Fast, Visible Imaging Experiments
The advances in high-voltage switching developed in this project allow a camera user to rapidly vary the number of output frames from 1 to 25. A high-voltage, variable-amplitude pulse train shifts the deflection location to the new frame location during the interlude between frames, making multiple frame counts and locations possible. The final deflection circuit deflects to five different frame positions per axis, including the center position, making for a total of 25 frames. To create the preset voltages, electronically adjustable {+-}500 V power supplies were chosen. Digital-to-analog converters provide digital control of the supplies. The power supplies are clamped to {+-}400 V so as not to exceed the voltage ratings of the transistors. A field-programmable gated array (FPGA) receives the trigger signal and calculates the combination of plate voltages for each frame. The interframe time and number of frames are specified by the user, but are limited by the camera electronics. The variable-frame circuit shifts the plate voltages of the first frame to those of the second frame during the user-specified interframe time. Designed around an electrostatic image tube, a framing camera images the light present during each frame (at the photocathode) onto the tube’s phosphor. The phosphor persistence …
Date:
May 11, 2011
Creator:
Amy Lewis, Stuart Baker, Brian Cox, Abel Diaz, David Glass, Matthew Martin
Object Type:
Article
System:
The UNT Digital Library
Web Archives: Outreach Strategy Task Force Proposal Review
Presentation for the 2011 International Internet Preservation Consortium General Assembly. This presentation discusses the International Internet Preservation Consortium's plans to increase awareness of web archiving activities and standards through outreach.
Date:
May 11, 2011
Creator:
Anderson, Martha
Object Type:
Presentation
System:
The UNT Digital Library
Certificate of Filing of the Dallas Way
A certificate recognizing the Dallas Way's submitted paperwork.
Date:
October 11, 2011
Creator:
Andrade, Hope
Object Type:
Text
System:
The UNT Digital Library
The Strategic Petroleum Reserve and Refined Product Reserves: Authorization and Drawdown Policy
This report discusses the Strategic Petroleum Reserve (SPR) in the Energy Policy and Consevation Act, which was authorized to help prevent a repetition of the economic dislocation caused by the 1973-1974 Arab oil embargo. The Government Accountability Office recently observed that the proportion of crude oil grades in the SPR has been growing less compatible with the heavier grades of crude oil that U.S. refineries have been upgrading to handle. This finding has raised questions about the SPR's effectiveness during a long-term oil disruption involving heavy oil.
Date:
March 11, 2011
Creator:
Andrews, Anthony & Pirog, Robert
Object Type:
Report
System:
The UNT Digital Library
[Email from Mike Anglin to Robert Emery, November 11, 2011]
Email from Mike Anglin to Robert Emery discussing Stan Arlen's interest in becoming a Dallas Way board member.
Date:
November 11, 2011
Creator:
Anglin, Mike
Object Type:
Letter
System:
The UNT Digital Library
Coil Creep and Skew-Quadrupole Field Components in the Tevatron
During the start-up of Run II of the Tevatron Collider program, several issues surfaced which were not present, or not seen as detrimental, during Run I. These included the repeated deterioration of the closed orbit requiring orbit smoothing every two weeks or so, the inability to correct the closed orbit to desired positions due to various correctors running at maximum limits, regions of systematically strong vertical dipole corrections, and the identification of very strong coupling between the two transverse degrees-of-freedom. It became apparent that many of the problems being experienced operationally were connected to a deterioration of the main dipole magnet alignment, and remedial actions were undertaken. However, the alignment alone was not enough to explain the corrector strengths required to handle transverse coupling. With one exception, strong coupling had generally not been an issue in the Tevatron during Run I. Based on experience with the Main Ring, the Tevatron was designed with a very strong skew quadrupole circuit to compensate any quadrupole alignment and skew quadrupole field errors that might present themselves. The circuit was composed of 48 correctors placed evenly throughout the arcs, 8 per sector, evenly placed in every other cell. Other smaller circuits were installed but …
Date:
July 11, 2011
Creator:
Annala, G.; Harding, D. J.; Syphers, M. J. & /Fermilab
Object Type:
Article
System:
The UNT Digital Library
Morocco: Current Issues
This report discusses the current political and foreign policy status of Morocco, especially with regard to its relationship with the United States and its struggles combating terrorism.
Date:
July 11, 2011
Creator:
Arieff, Alexis
Object Type:
Report
System:
The UNT Digital Library
Present Status And First Results of the Final Focus Beam Line at the KEK Accelerator Test Facility
ATF2 is a final-focus test beam line which aims to focus the low emittance beam from the ATF damping ring to a vertical size of about 37 nm and to demonstrate nanometer level beam stability. Several advanced beam diagnostics and feedback tools are used. In December 2008, construction and installation were completed and beam commissioning started, supported by an international team of Asian, European, and U.S. scientists. The present status and first results are described.
Date:
November 11, 2011
Creator:
Bambade, P.; Alabau Pons, M.; Amann, J.; Angal-Kalinin, D.; Apsimon, R.; Araki, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Ab Initio No-Core Shell Model
A long-standing goal of nuclear theory is to determine the properties of atomic nuclei based on the fundamental interactions among the protons and neutrons (i.e., nucleons). By adopting nucleon-nucleon (NN), three-nucleon (NNN) and higher-nucleon interactions determined from either meson-exchange theory or QCD, with couplings fixed by few-body systems, we preserve the predictive power of nuclear theory. This foundation enables tests of nature's fundamental symmetries and offers new vistas for the full range of complex nuclear phenomena. Basic questions that drive our quest for a microscopic predictive theory of nuclear phenomena include: (1) What controls nuclear saturation; (2) How the nuclear shell model emerges from the underlying theory; (3) What are the properties of nuclei with extreme neutron/proton ratios; (4) Can we predict useful cross sections that cannot be measured; (5) Can nuclei provide precision tests of the fundamental laws of nature; and (6) Under what conditions do we need QCD to describe nuclear structure, among others. Along with other ab initio nuclear theory groups, we have pursued these questions with meson-theoretical NN interactions, such as CD-Bonn and Argonne V18, that were tuned to provide high-quality descriptions of the NN scattering phase shifts and deuteron properties. We then add meson-theoretic NNN …
Date:
April 11, 2011
Creator:
Barrett, B R; Navratil, P & Vary, J P
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Joseph M. Base, August 11, 2011
Transcript of an oral interview with Joseph M. "Joe" Base. Base begins by discussing growing up during the Depression. In 1942, after he finished high school, Base enlisted in the Navy. When he finished basic training, Base attended signalman school before being assigned to submarine school at New London, Connecticut. Upon completing school, Base was assigned to the USS Redfin (SS-272) at Manitowoc, Wisconsin. Eventually, the Redfin made its way to the Panama Canal where it practiced firing torpedoes for a few days. Soon, they headed for Milne Bay, New Guinea and then to Darwin, Australia. From there, Base describes events that occurred during trhe Redfin's war patrols in the South China Seas and Celebes Sea: making contact with other US submarines; following Japanese tanker convoys; sinking Japanese destroyers; making torpedo attacks on convoys, being attacked with depth charges; enjoying some rest between patrols at Fremantle, Australia; rescuing survivors from the USS Flier (SS-250). Base served as a quartermaster aboard the Redfin, where he assisted the navigator in charting the ship's location, stood watches and steered the ship. After four or five war patrols, the Redfin returned to California for an overhaul where it received updated mine locating equipment. When …
Date:
August 11, 2011
Creator:
Base, Joseph M.
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Joseph M. Base, August 11, 2011
Transcript of an oral interview with Joseph M. "Joe" Base. Base begins by discussing growing up during the Depression. In 1942, after he finished high school, Base enlisted in the Navy. When he finished basic training, Base attended signalman school before being assigned to submarine school at New London, Connecticut. Upon completing school, Base was assigned to the USS Redfin (SS-272) at Manitowoc, Wisconsin. Eventually, the Redfin made its way to the Panama Canal where it practiced firing torpedoes for a few days. Soon, they headed for Milne Bay, New Guinea and then to Darwin, Australia. From there, Base describes events that occurred during trhe Redfin's war patrols in the South China Seas and Celebes Sea: making contact with other US submarines; following Japanese tanker convoys; sinking Japanese destroyers; making torpedo attacks on convoys, being attacked with depth charges; enjoying some rest between patrols at Fremantle, Australia; rescuing survivors from the USS Flier (SS-250). Base served as a quartermaster aboard the Redfin, where he assisted the navigator in charting the ship's location, stood watches and steered the ship. After four or five war patrols, the Redfin returned to California for an overhaul where it received updated mine locating equipment. When …
Date:
August 11, 2011
Creator:
Base, Joseph M.
Object Type:
Text
System:
The Portal to Texas History
Environmental Laws: Summaries of Major Statutes Administered by the Environmental Protection Agency
This report presents a summary of the body of federal environmental statutes that together constitute the main authorities of EPA, but this report is not comprehensive in terms of discussing all federal statutes that may authorize certain activities of the agency.
Date:
August 11, 2011
Creator:
Bearden, David M.; Copeland, Claudia; Luther, Linda; McCarthy, James E.; Schierow, Linda-Jo & Tiemann, Mary
Object Type:
Report
System:
The UNT Digital Library
TARGET: A multi-channel digitizer chip for very-high-energy gamma-ray telescopes
The next-generation very-high-energy (VHE) gamma-ray observatory, the Cherenkov Telescope Array, will feature dozens of imaging atmospheric Cherenkov telescopes (IACTs), each with thousands of pixels of photosensors. To be affordable and reliable, reading out such a mega-channel array requires event recording technology that is highly integrated and modular, with a low cost per channel. We present the design and performance of a chip targeted to this application: the TeV Array Readout with GSa/s sampling and Event Trigger (TARGET). This application-specific integrated circuit (ASIC) has 16 parallel input channels, a 4096-sample buffer for each channel, adjustable input termination, self-trigger functionality, and tight window-selected readout. We report the performance of TARGET in terms of sampling frequency, power consumption, dynamic range, current-mode gain, analog bandwidth, and cross talk. The large number of channels per chip allows a low cost per channel ($10 to $20 including front-end and back-end electronics but not including photosensors) to be achieved with a TARGET-based IACT readout system. In addition to basic performance parameters of the TARGET chip itself, we present a camera module prototype as well as a second-generation chip (TARGET 2), both of which have been produced.
Date:
August 11, 2011
Creator:
Bechtol, K.; Funk, S.; Okumura, A.; Ruckman, L.; Simons, A.; Tajima, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Nanometer-Scale Epitaxial Strain Release in Perovskite Heterostructures Using 'SrAlOx' Sliding Buffer Layers
We demonstrate the strain release of LaAlO{sub 3} epitaxial film on SrTiO{sub 3} (001) by inserting ultra-thin 'SrAlO{sub x}' buffer layers. Although SrAlO{sub x} is not a perovskite, nor stable as a single phase in bulk, epitaxy stabilizes the perovskite structure up to a thickness of 2 unit cells (uc). At a critical thickness of 3 uc of SrAlO{sub x}, the interlayer acts as a sliding buffer layer, and abruptly relieves the lattice mismatch between the LaAlO{sub 3} filmand the SrTiO{sub 3} substrate, while maintaining crystallinity. This technique may provide a general approach for strain relaxation of perovskite film far below the thermodynamic critical thickness. A central issue in heteroepitaxial filmgrowth is the inevitable difference in lattice constants between the filmand substrate. Due to this lattice mismatch, thin film are subjected to microstructural strain, which can have a significan effect on the filmproperties. This challenge is especially prominent in the rapidly developing fiel of oxide electronics, where much interest is focused on incorporating the emergent physical properties of oxides in devices. Although strain can be used to great effect to engineer unusual ground states, it is often deleterious for bulk first-orde phase transitions, which are suppressed by the strain and …
Date:
August 11, 2011
Creator:
Bell, Christopher
Object Type:
Article
System:
The UNT Digital Library
Reentrant Insulating State in Ultrathin Manganite Films
The transport and magnetic properties of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin-films grown by pulsed laser deposition on (LaAlO{sub 3}){sub 0.3}(SrAl{sub 0.5}Ta{sub 0.5}O{sub 3}){sub 0.7} single crystal substrates have been investigated. A systematic series with various thicknesses of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} was used to establish a phase diagram - which showed a clear difference compared to films grown on SrTiO{sub 3} substrates, highlighting the importance of film thickness and substrate strain. At 8 unit cells, the boundary between the metallic and insulating ground states, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned with by magnetic field, and is interpreted as a signature of electronic phase separation.
Date:
August 11, 2011
Creator:
Bell, Christopher
Object Type:
Article
System:
The UNT Digital Library
Tuning the Electron Gas at an Oxide Heterointerface via Free Surface Charges
Oxide heterointerfaces are emerging as one of the most exciting materials systems in condensed matter science. One remarkable example is the LaAlO{sub 3}/SrTiO{sub 3} (LAO/STO) interface, a model system in which a highly mobile electron gas forms between two band insulators, exhibiting two dimensional superconductivity and unusual magnetotransport properties. An ideal tool to tune such an electron gas is the electrostatic field effect. In principle, the electrostatic field can be generated by bound charges due to polarization (as in the normal and ferroelectric field effects) or by adding excess free charge. In previous studies, a large modulation of the carrier density and mobility of the LAO/STO interface has been achieved using the normal field effect. However, little attention has been paid to the field effect generated by free charges. This issue is scarcely addressed, even in conventional semiconductor devices, since the free charges are typically not stable. Here, we demonstrate an unambiguous tuning of the LAO/STO interface conductivity via free surface charges written using conducting atomic force microscopy (AFM). The modulation of the carrier density was found to be reversible, nonvolatile and surprisingly large, {approx}3 x 10{sup 13} cm{sup -2}, comparable to the maximum modulation by the normal field effect. …
Date:
August 11, 2011
Creator:
Bell, Christopher
Object Type:
Article
System:
The UNT Digital Library
Definitive Alkene Identification Needed for In-Vitro Studies with Ole (Olefin Synthesis) Proteins
None
Date:
July 11, 2011
Creator:
Beller, Harry; Goh, Ee-Been & Keasling, Jay
Object Type:
Article
System:
The UNT Digital Library
Health Insurance: A Primer
This report provides information about Health Insurance where people buy insurance to protect themselves against the possibility of financial loss in the future. Americans obtain insurance in different settings and a variety of methods.
Date:
January 11, 2011
Creator:
Bernadette, Fernandez
Object Type:
Report
System:
The UNT Digital Library
Intelligence Issues for Congress
This report gives an overview of current intelligence issues of interest to the 112th Congress. It includes background and analysis including most recent development, ongoing Congressional concerns, specific issues for the 112th Congress, and a summary of related legislation from the 109th through the 112th Congresses.
Date:
February 11, 2011
Creator:
Best, Richard A., Jr.
Object Type:
Report
System:
The UNT Digital Library
Supreme Court Nominations: Senate Floor Procedure and Practice, 1789-2011
This report examines the ways in which the Senate has handled the 160 Supreme Court nominations the President has sent to the Senate. As the purpose of this report is to examine the forms taken by Senate proceedings on these 160 nominations, it treats each nomination as a separate case. It is not couched in terms of the smaller number of different individuals nominated or the ultimate outcome the confirmation process may have had for each individual.
Date:
March 11, 2011
Creator:
Beth, Richard S. & Palmer, Betsy
Object Type:
Report
System:
The UNT Digital Library