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139
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53
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46
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34
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17
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9
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The U.S. Secret Service: An Examination and Analysis of Its Evolving Missions
The U.S. Secret Service has two missions: criminal investigations and protection. This report looks at the history of the organization and purpose as it relates to Congress.
Date:
April 16, 2012
Creator:
Reese, Shawn
Object Type:
Report
System:
The UNT Digital Library
Applications of Photonuclear Physics for International Safeguards and Security
Studies of nuclear resonance fluorescence based applications are presented. Important for these applications are data for isotopes such as {sup 239}Pu. Nuclear resonance fluorescence measurements of {sup 239}Pu were performed at the free electron laser facility at UC Santa Barbara using photons from a bremsstrahlung beam with an endpoint energies between 4.0 MeV and 5.5 MeV. Though no discrete states with significant confidence level were measured, we have excluded the region above 27(3) eV-barns, or 4-sigma, where we would expect only a small chance of false positives. Details of the measurements and the results are presented here.
Date:
April 16, 2010
Creator:
Johnson, M. S.; Hall, J. M.; McNabb, D. P.; McFarland, J.; Norman, E.; Bertozzi, W. et al.
Object Type:
Article
System:
The UNT Digital Library
Cuba: U.S. Restrictions on Travel and Remittances
The first half of this report looks at the background of U.S. travel restrictions to Cuba over the last 40 years. The second half of this report looks at several initiatives from the 111th Congress that would ease U.S. travel restrictions to Cuba.
Date:
April 16, 2010
Creator:
Sullivan, Mark P.
Object Type:
Report
System:
The UNT Digital Library
Cuba: U.S. Restrictions on Travel and Remittances
This report covers the contentious travel restrictions between the U.S. and Cuba from the 1960s to the present time. It includes background on the restrictions, enforcement of restrictions, and arguments for or against maintaining travel restrictions. It also provides background on relevant legislative initiatives during the 106th through the 111th Congresses.
Date:
April 16, 2010
Creator:
Sullivan, Mark P.
Object Type:
Report
System:
The UNT Digital Library
Direct-Drive Inertial Fusion Research at the University of Rochester's Laboratory for Laser Energetics: A Review
This paper reviews the status of direct-drive inertial confinement fusion (ICF) research at the University of Rochester's Laboratory for Laser Energetics (LLE). LLE's goal is to demonstrate direct-drive ignition on the National Ignition Facility (NIF) by 2014. Baseline "all-DT" NIF direct-drive ignition target designs have been developed that have a predicted gain of 45 (1-D) at a NIF drive energy of ~1.6 MJ. Significantly higher gains are calculated for targets that include a DT-wicked foam ablator. This paper also reviews the results of both warm fuel and initial cryogenic-fuel spherical target implosion experiments carried out on the OMEGA UV laser. The results of these experiments and design calculations increase confidence that the NIF direct-drive ICF ignition goal will be achieved.
Date:
April 16, 2010
Creator:
McCrory, R. L.; Meyerhofer, D. D.; Loucks, S. J.; Skupsky, S.; Bahr, R. E.; Betti, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Earmarks Disclosed by Congress: FY2008-FY2010 Regular Appropriations Bills
This report summarizes the earmarks disclosed for the 12 regular, annual appropriations bills for each of FY2008, FY2009, and FY2010 and analyzes the data without additions or deletions. For individual earmarks, the disclosures typically identify the federal agency, project name, amount, and requester. In some cases, other information also has been included, such as an account within an agency, or the purpose or location of the earmark.
Date:
April 16, 2010
Creator:
Vincent, Carol H. & Monke, Jim
Object Type:
Report
System:
The UNT Digital Library
Estimating Offset Supply in a Cap-and-Trade Program
None
Date:
April 16, 2010
Creator:
Ramseur, Jonathan L.
Object Type:
Report
System:
The UNT Digital Library
Federal Register, Volume 75, Number 73, April 16, 2010, Pages 19873-20236
Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date:
April 16, 2010
Creator:
United States. Office of the Federal Register.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Financial Regulatory Reform and the 111th Congress
Financial regulatory reform is being discussed in the 111th Congress, the continuation of a policy debate that began before the September 2008 financial disruption. This report reviews issues related to financial regulation. It provides brief descriptions of comprehensive reform bills in the 111th Congress that addresses these issues.
Date:
April 16, 2010
Creator:
Webel, Baird; Carpenter, David H.; Labonte, Marc; Miller, Rena S.; Murphy, Edward V. & Shorter, Gary
Object Type:
Report
System:
The UNT Digital Library
Gratings for Increasing Solid-State Laser Gain and Efficiency
We introduce new concepts for increasing the efficiency of solid state lasers by using gratings deposited on laser slabs or disks. The gratings improve efficiency in two ways: (1) by coupling out of the slab deleterious amplified spontaneous emission (ASE) and (2) by increasing the absorption efficiency of pump light. The gratings also serve as antireflective coatings for the extracting laser beam. To evaluate the potential for such coatings to improve laser performance, we calculated optical properties of a 2500 groove/mm, tantala-silica grating on a 1cm x 4cm x 8cm titanium-doped sapphire slab and performed ray-trace calculations for ASE and pump light. Our calculations show substantial improvements in efficiency due to grating ASE-coupling properties. For example, the gratings reduce pump energy required to produce a 0.6/cm gain coefficient by 9%, 20% and 35% for pump pulse durations of 0.5 {micro}s, 1{micro}s and 3{micro}s, respectively. Gratings also increase 532-nm pump-light absorption efficiency, particularly when the product slab overall absorption is small. For example, when the single-pass absorption is 1 neper, absorption efficiency increases from 66%, without gratings, to 86%, when gratings are used.
Date:
April 16, 2010
Creator:
Erlandson, A C; Britten, J A & Bonlie, J D
Object Type:
Report
System:
The UNT Digital Library
Military Training: Actions Needed to Further Improve the Consistency of Combat Skills Training Provided to Army and Marine Corps Support Forces
A letter report issued by the Government Accountability Office with an abstract that begins "In conventional warfare, support forces such as military police, engineers, and medical personnel normally operate behind the front lines of a battlefield. But in Iraq and Afghanistan--both in U.S. Central Command's (CENTCOM) area of responsibility--there is no clear distinction between front lines and rear areas, and support forces are sometimes exposed to hostile fire without help from combat arms units. The House report to the National Defense Authorization Act for fiscal year 2010 directed GAO to report on combat skills training for support forces. GAO assessed the extent to which (1) Army and Marine Corps support forces are completing required combat skills training; (2) the services and CENTCOM have information to validate completion of required training; and (3) the services have used lessons learned to adjust combat skills training for support forces. To do so, GAO analyzed current training requirements, documentation of training completion, and lessons learned guidance; observed support force training; and interviewed headquarters officials, trainers, and trainees between August 2009 and February 2010."
Date:
April 16, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Proton Radiography: Cross Section Measurements and Detector Development
Proton radiography has become an important tool for predicting the performance of stockpiled nuclear weapons. Current proton radiography experiments at LANSCE are confined to relatively small targets on the order of centimeters in size because of the low beam energy. LANL scientists have made radiographs with 12 and 24 GeV protons produced by the accelerator at Brookhaven National Laboratory. These energies are in the range required for hydrotest radiography. The design of a facility for hydrotest radiography requires knowledge of the cross sections for producing high-energy particles in the forward direction, which are incorporated into the Monte Carlo simulation used in designing the beam and detectors. There are few existing measurements of neutron production cross sections for proton-nuclei interactions in the 50 GeV range, and almost no data exist for forward neutron production, especially for heavy target nuclei. Thus the data from the MIPP EMCAL and HCAL, for which our group was responsible, are critical to proton radiography. Since neutrons and photons cannot be focused by magnets, they cause a background “fog” on the images. This problem can be minimized by careful design of the focusing system and detectors. The purpose of our research was to measure forward production of …
Date:
April 16, 2010
Creator:
Longo, Michael J.; Rajaram, H. R. Gustafson: Durga & Nigmanov, Turgun
Object Type:
Text
System:
The UNT Digital Library
Seasonal versus Episodic Performance Evaluation for an Eulerian Photochemical Air Quality Model
This study presents detailed evaluation of the seasonal and episodic performance of the Community Multiscale Air Quality (CMAQ) modeling system applied to simulate air quality at a fine grid spacing (4 km horizontal resolution) in central California, where ozone air pollution problems are severe. A rich aerometric database collected during the summer 2000 Central California Ozone Study (CCOS) is used to prepare model inputs and to evaluate meteorological simulations and chemical outputs. We examine both temporal and spatial behaviors of ozone predictions. We highlight synoptically driven high-ozone events (exemplified by the four intensive operating periods (IOPs)) for evaluating both meteorological inputs and chemical outputs (ozone and its precursors) and compare them to the summer average. For most of the summer days, cross-domain normalized gross errors are less than 25% for modeled hourly ozone, and normalized biases are between {+-}15% for both hourly and peak (1 h and 8 h) ozone. The domain-wide aggregated metrics indicate similar performance between the IOPs and the whole summer with respect to predicted ozone and its precursors. Episode-to-episode differences in ozone predictions are more pronounced at a subregional level. The model performs consistently better in the San Joaquin Valley than other air basins, and episodic …
Date:
April 16, 2010
Creator:
Jin, Ling; Brown, Nancy J.; Harley, Robert A.; Bao, Jian-Wen; Michelson, Sara A & Wilczak, James M
Object Type:
Article
System:
The UNT Digital Library
Securing Nuclear Materials: The 2010 Summit and Issues for Congress
This report discusses domestic and global nuclear security measures. It talks about the challenges to achieve the four-year goal, the multilateral efforts to improve nuclear security, and the role of nongovernmental organization and the nuclear industry. The report concludes that Congress will continue to decide on funding for the U.S. domestic and international programs focused on nuclear material security and nuclear terrorism prevention. Congress is also likely to assess implementation of the Administration's goal to secure nuclear materials by the end of 2013.
Date:
April 16, 2010
Creator:
Nikitin, Mary Beth
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 35, Number 16, Pages 2899-3130, April 16, 2010
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
April 16, 2010
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
81st Texas Legislature, Senate Bill 769, Chapter 1
Bill introduced by the Texas Senate relating to methods for the recovery of system restoration costs incurred by electric utilities following hurricanes, tropical storms, ice or snow storms, floods, and other weather-related events and natural disasters.
Date:
April 16, 2009
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
Abelian Hidden Sectors at a GeV
We discuss mechanisms for naturally generating GeV-scale hidden sectors in the context of weak-scale supersymmetry. Such low mass scales can arise when hidden sectors are more weakly coupled to supersymmetry breaking than the visible sector, as happens when supersymmetry breaking is communicated to the visible sector by gauge interactions under which the hidden sector is uncharged, or if the hidden sector is sequestered from gravity-mediated supersymmetry breaking. We study these mechanisms in detail in the context of gauge and gaugino mediation, and present specific models of Abelian GeV-scale hidden sectors. In particular, we discuss kinetic mixing of a U(1){sub x} gauge force with hypercharge, singlets or bi-fundamentals which couple to both sectors, and additional loop effects. Finally, we investigate the possible relevance of such sectors for dark matter phenomenology, as well as for low- and high-energy collider searches.
Date:
April 16, 2009
Creator:
Morrissey, David E.; Poland, David; U., /Harvard; Zurek, Kathryn & U., /Fermilab /Michigan
Object Type:
Article
System:
The UNT Digital Library
Algeria: Current Issues
This report examines the current state of Algeria, including the country's associations with terrorism, despite steady decreases of domestic terrorism; the lessening in power of the Algerian military; and growing oil revenues.
Date:
April 16, 2009
Creator:
Migdalovitz, Carol
Object Type:
Report
System:
The UNT Digital Library
Assessment of Contribution of Contemporary Carbon Sources to Size-Fractionated Particulate Matter and Time-Resolved Bulk Particulate Matter Using the Measurement of Radiocarbon
This study was motivated by a desire to improve understanding of the sources contributing to the carbon that is an important component of airborne particulate matter (PM). The ultimate goal of this project was to lay a ground work for future tools that might be easily implemented with archived or routinely collected samples. A key feature of this study was application of radiocarbon measurement that can be interpreted to indicate the relative contributions from fossil and non-fossil carbon sources of atmospheric PM. Size-resolved PM and time-resolved PM{sub 10} collected from a site in Sacramento, CA in November 2007 (Phase I) and March 2008 (Phase II) were analyzed for radiocarbon and source markers such as levoglucosan, cholesterol, and elemental carbon. Radiocarbon data indicates that the contributions of non-fossil carbon sources were much greater than that from fossil carbon sources in all samples. Radiocarbon and source marker measurements confirm that a greater contribution of non-fossil carbon sources in Phase I samples was highly likely due to residential wood combustion. The present study proves that measurement of radiocarbon and source markers can be readily applied to archived or routinely collected samples for better characterization of PM sources. More accurate source apportionment will support …
Date:
April 16, 2009
Creator:
Hwang, H. M.; Young, T. M. & Buchholz, B. A.
Object Type:
Report
System:
The UNT Digital Library
Columbia River Hatchery Reform System-Wide Report.
The US Congress funded the Puget Sound and Coastal Washington Hatchery Reform Project via annual appropriations to the US Fish and Wildlife Service (USFWS) beginning in fiscal year 2000. Congress established the project because it recognized that while hatcheries have a necessary role to play in meeting harvest and conservation goals for Pacific Northwest salmonids, the hatchery system was in need of comprehensive reform. Most hatcheries were producing fish for harvest primarily to mitigate for past habitat loss (rather than for conservation of at-risk populations) and were not taking into account the effects of their programs on naturally spawning populations. With numerous species listed as threatened or endangered under the Endangered Species Act (ESA), conservation of salmon in the Puget Sound area was a high priority. Genetic resources in the region were at risk and many hatchery programs as currently operated were contributing to those risks. Central to the project was the creation of a nine-member independent scientific review panel called the Hatchery Scientific Review Group (HSRG). The HSRG was charged by Congress with reviewing all state, tribal and federal hatchery programs in Puget Sound and Coastal Washington as part of a comprehensive hatchery reform effort to: conserve indigenous salmonid …
Date:
April 16, 2009
Creator:
Warren, Dan
Object Type:
Report
System:
The UNT Digital Library
Developing the Optimal Technique for Cluster Photometric Redshift Determination: An Essential Ingredient in Measuring Dark Energy with Cluster Abundances
We received funding to fabricate and characterize dichroic beamsplitters for optical filtering applications in astronomical instrumentation. A competitive bidding process led to the selection of a vendor who has successfully fabricated subcomponents that meet our optical specifications. The final assembly of the subcomponents into a complete optical module is under way, and we expect final delivery of the part to our laboratory in May 2009.
Date:
April 16, 2009
Creator:
Stubbs, Christopher
Object Type:
Report
System:
The UNT Digital Library
Development of Modeling Capabilities for the Analysis of Supercritical Water-Cooled Reactor Thermal-Hydraulics and Dynamics
Develop an experimental and theoretical data base for heat transfer in tubes and channels cooled by water and CO2 at supercritical pressures.
Date:
April 16, 2009
Creator:
Podowski, Michael Z.
Object Type:
Report
System:
The UNT Digital Library
Disconnected Youth: A Look at 16- to 24-Year Olds Who Are Not Working or In School
This report provides information about 16- to 24-Year Olds Who Are Not Working or In School on Disconnected Youth. Policymakers and youth advocates have begun to focus greater attention on young people who are not working or in school.
Date:
April 16, 2009
Creator:
Fernandes, Adrienne L. & Gabe, Thomas
Object Type:
Report
System:
The UNT Digital Library
Effect of flow fluctuations and nonflow on elliptic flow methods
We discuss how the different estimates of elliptic flow are influenced by flow fluctuations and nonflow effects. It is explained why the event-plane method yields estimates between the two-particle correlation methods and the multiparticle correlation methods. It is argued that nonflow effects and fluctuations cannot be disentangled without other assumptions. However, we provide equations where, with reasonable assumptions about fluctuations and nonflow, all measured values of elliptic flow converge to a unique mean v_2,PP elliptic flow in the participant plane and, with a Gaussian assumption on eccentricity fluctuations, can be converted to the mean v_2,RP in the reaction plane. Thus, the 20percent spread in observed elliptic flow measurements from different analysis methods is no longer mysterious.
Date:
April 16, 2009
Creator:
Ollitrault, Jean-Yves; Poskanzer, Arthur M. & Voloshin, Sergei A.
Object Type:
Article
System:
The UNT Digital Library