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Missile Defense: Actions Needed to Improve Information for Supporting Future Key Decisions for Boost and Ascent Phase Elements (open access)

Missile Defense: Actions Needed to Improve Information for Supporting Future Key Decisions for Boost and Ascent Phase Elements

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) has spent about $107 billion since the mid-1980s to develop a capability to destroy incoming ballistic missiles. DOD has set key decision points for deciding whether to further invest in capabilities to destroy missiles during the initial phases after launch. In March 2006, DOD issued a report on these capabilities in response to two mandates. To satisfy a direction from the House Appropriations Committee, GAO agreed to review the report. To assist Congress in evaluating DOD's report and preparing for future decisions, GAO studied the extent to which DOD (1) analyzed technical and operational issues and (2) presented complete cost information. To do so, GAO assessed the report's methodology, explanation of assumptions and their effects on results, and whether DOD followed key principles for developing life-cycle costs."
Date: April 17, 2007
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
DHS Immigration Attorneys: Workload Analysis and Workforce Planning Efforts Lack Data and Documentation (open access)

DHS Immigration Attorneys: Workload Analysis and Workforce Planning Efforts Lack Data and Documentation

A letter report issued by the Government Accountability Office with an abstract that begins "The legal staff of key Department of Homeland Security (DHS) components--Immigration and Customs Enforcement (ICE), U.S. Citizenship and Immigration Services (USCIS), and Customs and Border Protection (CBP)--perform important immigration enforcement, inspection, and service functions. This report addresses the actions ICE, USCIS, and CBP legal offices are taking to identify attorney needs, determine where those attorneys should be deployed, and address staffing shortfalls. To conduct its work, GAO interviewed component senior legal office officials in headquarters and regional offices and reviewed available documentation on staffing."
Date: April 17, 2007
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
International Trade: Persistent Weaknesses in the In-Bond Cargo System Impede Customs and Border Protection's Ability to Address Revenue, Trade, and Security Concerns (open access)

International Trade: Persistent Weaknesses in the In-Bond Cargo System Impede Customs and Border Protection's Ability to Address Revenue, Trade, and Security Concerns

A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. Customs and Border Protection (CBP) must strive to balance its competing goals of facilitating trade, providing port security, and collecting trade revenues. CBP's in-bond system, which allows goods to transit the United States without formally entering U.S. commerce, must also balance these goals. In response to concerns that previously identified weaknesses in the in-bond system have not been remedied, GAO examined (1) the purpose of the in-bond system and the extent of its use (2) CBP efforts to ensure that revenues are collected and trade concerns are minimized, and (3) CBP efforts to ensure that security-related inspections are properly targeted. GAO examined audit reports and agency documents, interviewed officials at CBP headquarters and at 10 CBP port offices. GAO also discussed the in-bond system with trade groups impacted by the in-bond system."
Date: April 17, 2007
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
U.S. Postal Service: Postal Reform Law Provides Opportunities to Address Postal Challenges (open access)

U.S. Postal Service: Postal Reform Law Provides Opportunities to Address Postal Challenges

Testimony issued by the Government Accountability Office with an abstract that begins "When GAO originally placed the U.S. Postal Service's (the Service) transformation efforts and long-term outlook on its high-risk list in early 2001, it was to focus urgent attention on the Service's deteriorating financial situation. Aggressive action was needed, particularly in cutting costs, improving productivity, and enhancing financial transparency. GAO testified several times since 2001 that comprehensive postal reform legislation was needed to address the Service's unsustainable business model, which assumed that increasing mail volume would cover rising costs and mitigate rate increases. This outdated model limited its flexibility and incentives needed to realize sufficient cost savings to offset rising costs, declining First-Class Mail volumes, unfunded obligations, and an expanding delivery network. This limitation threatened the Service's ability to achieve its mission of providing affordable, high-quality universal postal services on a self-financing basis. This testimony will focus on (1) why GAO recently removed the Service's transformation efforts and outlook from GAO's high-risk list, (2) the Service's financial condition in fiscal year 2007, (3) the opportunities and challenges facing the Service, and (4) major issues and areas for congressional oversight. This testimony is based on GAO's past work, review of …
Date: April 17, 2007
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library

Senior Recital: 2007-04-17 - Nathan Sankary, percussion

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 17, 2007
Creator: Sankary, Nathan
Object Type: Sound
System: The UNT Digital Library
Economic and Fiscal Impacts of Dallas Area Rapid Transit Operations and Capital Expenditures (open access)

Economic and Fiscal Impacts of Dallas Area Rapid Transit Operations and Capital Expenditures

This report summarizes the findings of the University of North Texas Center for Economic Development and Research's analysis of the economic and fiscal impacts of Dallas Area Rapid Transit operations and capital spending.
Date: April 17, 2007
Creator: Clower, Terry L. & Weinstein, Bernard L.
Object Type: Report
System: The UNT Digital Library
CAMS/LLNL Ion Source Efficiency Revisited (open access)

CAMS/LLNL Ion Source Efficiency Revisited

None
Date: April 17, 2007
Creator: Fallon, S. J.; Guilderson, T. P. & Brown, T. A.
Object Type: Article
System: The UNT Digital Library
Counting constituents in molecular complexes by fluorescence photon antibunching (open access)

Counting constituents in molecular complexes by fluorescence photon antibunching

Modern single molecule fluorescence microscopy offers new, highly quantitative ways of studying the systems biology of cells while keeping the cells healthy and alive in their natural environment. In this context, a quantum optical technique, photon antibunching, has found a small niche in the continuously growing applications of single molecule techniques to small molecular complexes. Here, we review some of the most recent applications of photon antibunching in biophotonics, and we provide a guide for how to conduct photon antibunching experiments at the single molecule level by applying techniques borrowed from time-correlated single photon counting. We provide a number of new examples for applications of photon antibunching to the study of multichromophoric molecules and small molecular complexes.
Date: April 17, 2007
Creator: Fore, S; Laurence, T; Hollars, C & Huser, T
Object Type: Article
System: The UNT Digital Library
The Treatment of Renewable Energy Certificates, EmissionsAllowances, and Green Power Programs in State Renewables PortfolioStandards (open access)

The Treatment of Renewable Energy Certificates, EmissionsAllowances, and Green Power Programs in State Renewables PortfolioStandards

Twenty-one states and the District of Columbia have adopted mandatory renewables portfolio standards (RPS) over the last ten years. Renewable energy attributes-such as the energy source, conversion technology, plant location and vintage, and emissions-are usually required to verify compliance with these policies, sometimes through attributes bundled with electricity, and sometimes with the attributes unbundled from electricity and traded separately as renewable energy certificates (RECs). This report summarizes the treatment of renewable energy attributes in state RPS rules. Its purpose is to provide a source of information for states considering RPS policies, and also to draw attention to certain policy issues that arise when renewable attributes and RECs are used for RPS compliance. Three specific issues are addressed: (1) the degree to which unbundled RECs are allowed under existing state RPS programs and the status of systems to track RECs and renewable energy attributes; (2) definitions of the renewable energy attributes that must be included in order to meet state RPS obligations, including the treatment of available emissions allowances; and (3) state policies on whether renewable energy or RECs sold through voluntary green power transactions may count towards RPS obligations.
Date: April 17, 2007
Creator: Holt, Edward A. & Wiser, Ryan H.
Object Type: Report
System: The UNT Digital Library
High-Power Laser Pulse Recirculation for Inverse Compton Scattering-Produced Gamma-Rays (open access)

High-Power Laser Pulse Recirculation for Inverse Compton Scattering-Produced Gamma-Rays

Inverse Compton scattering of high-power laser pulses on relativistic electron bunches represents an attractive method for high-brightness, quasi-monoenergetic {gamma}-ray production. The efficiency of {gamma}-ray generation via inverse Compton scattering is severely constrained by the small Thomson scattering cross section. Furthermore, repetition rates of high-energy short-pulse lasers are poorly matched with those available from electron accelerators, resulting in low repetition rates for generated {gamma}-rays. Laser recirculation has been proposed as a method to address those limitations, but has been limited to only small pulse energies and peak powers. Here we propose and experimentally demonstrate an alternative method for laser pulse recirculation that is uniquely capable of recirculating short pulses with energies exceeding 1 J. Inverse Compton scattering of recirculated Joule-level laser pulses has a potential to produce unprecedented peak and average {gamma}-ray brightness in the next generation of sources.
Date: April 17, 2007
Creator: Jovanovic, I; Shverdin, M; Gibson, D & Brown, C
Object Type: Article
System: The UNT Digital Library
Greensheet (Houston, Tex.), Vol. 38, No. 121, Ed. 1 Tuesday, April 17, 2007 (open access)

Greensheet (Houston, Tex.), Vol. 38, No. 121, Ed. 1 Tuesday, April 17, 2007

Free weekly newspaper that includes business and classified advertising.
Date: April 17, 2007
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 38, No. 122, Ed. 1 Tuesday, April 17, 2007 (open access)

Greensheet (Houston, Tex.), Vol. 38, No. 122, Ed. 1 Tuesday, April 17, 2007

Free weekly newspaper that includes business and classified advertising.
Date: April 17, 2007
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 91, No. 98, Ed. 1 Tuesday, April 17, 2007 (open access)

North Texas Daily (Denton, Tex.), Vol. 91, No. 98, Ed. 1 Tuesday, April 17, 2007

Daily student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date: April 17, 2007
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Attorney General Opinion: GA-0539 (open access)

Texas Attorney General Opinion: GA-0539

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether the Calhoun County Navigation District may enact a tax limitation under article VIII, section 1-b(h) of the Texas Constitution.
Date: April 17, 2007
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: GA-0540 (open access)

Texas Attorney General Opinion: GA-0540

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether an individual may simultaneously serve as a constable in Goliad County and as a member of the board of directors of the Goliad County Groundwater Conservation District.
Date: April 17, 2007
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Economics of Federal Reserve Independence (open access)

Economics of Federal Reserve Independence

This report gives a brief description of the structure of the Fed. It then discusses the economics of how Fed independence affects monetary policy. The report does not consider how Fed independence may affect the Fed's other duties, such as its oversight of the financial system. It then examines the probable economic ramifications of proposals to curb the independence of the Fed.
Date: April 17, 2007
Creator: Labonte, Marc
Object Type: Report
System: The UNT Digital Library
Federal Farm Promotion (“Check-Off”) Programs (open access)

Federal Farm Promotion (“Check-Off”) Programs

None
Date: April 17, 2007
Creator: Becker, Geoffrey S.
Object Type: Report
System: The UNT Digital Library
Striped Bass Spawning in Non-Estuarine Portions of the Savannah River (open access)

Striped Bass Spawning in Non-Estuarine Portions of the Savannah River

Historically, the estuarine portions of the Savannah River have been considered to be the only portion of the river in which significant amounts of striped bass (Morone saxatilis) spawning normally occur. A reexamination of data from 1983 through 1985 shows a region between River Kilometers 144 and 253 where significant numbers of striped bass eggs and larvae occur with estimated total egg production near that currently produced in the estuarine reaches. It appears possible that there are two separate spawning populations of striped bass in the Savannah River.
Date: April 17, 2007
Creator: Martin, D. & Paller, M.
Object Type: Article
System: The UNT Digital Library
Precision Measurement of the Undulator K Parameter using Spontaneous Radiation (open access)

Precision Measurement of the Undulator K Parameter using Spontaneous Radiation

Obtaining precise values of the undulator parameter, K, is critical for producing high-gain FEL radiation. At the LCLS [1], where the FEL wavelength reaches down to 1.5 {angstrom}, the relative precision of K must satisfy ({Delta}K/K){sub rms} {approx}< 0.015% over the full length of the undulator. Transverse misalignments, construction errors, radiation damage, and temperature variations all contribute to errors in the mean K values among the undulator segments. It is therefore important to develop some means to measure relative K values, after installation and alignment. We propose a method using the angle-integrated spontaneous radiation spectrum of two nearby undulator segments, and the natural shot-to-shot energy jitter of the electron beam. Simulation of this scheme is presented using both ideal and measured undulator fields. By ''leap-frogging'' to different pairs of segments with extended separations we hope to confirm or correct the values of K, including proper tapering, over the entire 130-m long LCLS undulator.
Date: April 17, 2007
Creator: Welch, J. J.; Arthur, J.; Emma, P.; Hastings, J. B.; Huang, Z.; Nuhn, H. D. et al.
Object Type: Article
System: The UNT Digital Library
First Principles Investigations of Americium, Plutonium and their Mixtures using Dynamical Mean Field Theory (open access)

First Principles Investigations of Americium, Plutonium and their Mixtures using Dynamical Mean Field Theory

We developed a relativistic dynamical mean field approach to study the properties of Plutonium Americium mixtures.
Date: April 17, 2007
Creator: Kotliar, Gabriel & Savrasov, Sergej
Object Type: Report
System: The UNT Digital Library
Linac Coherent Light Source Undulator RF BPM System (open access)

Linac Coherent Light Source Undulator RF BPM System

The Linac Coherent Light Source (LCLS) will be the world's first x-ray free-electron laser (FEL) when it becomes operational in 2009. The LCLS is currently in the construction phase. The beam position monitor (BPM) system planned for the LCLS undulator will incorporate a high-resolution X-band cavity BPM system described in this paper. The BPM system will provide high-resolution measurements of the electron beam trajectory on a pulse-to-pulse basis and over many shots. The X-band cavity BPM size, simple fabrication, and high resolution make it an ideal choice for LCLS beam position detection. We will discuss the system specifications, design, and prototype test results.
Date: April 17, 2007
Creator: Lill, R. M.; Morrison, L. H.; Waldschmidt, G. J.; Walters, D. R.; Johnson, R.; Li, Z. et al.
Object Type: Article
System: The UNT Digital Library
QUANTITATIVE EVALUATION OF FIRE SEPARATION AND BARRIERS (open access)

QUANTITATIVE EVALUATION OF FIRE SEPARATION AND BARRIERS

Fire barriers, and physical separation are key components in managing the fire risk in Nuclear Facilities. The expected performance of these features have often been predicted using rules-of-thumb or expert judgment. These approaches often lack the convincing technical bases that exist when addressing other Nuclear Facility accident events. This paper presents science-based approaches to demonstrate the effectiveness of fire separation methods.
Date: April 17, 2007
Creator: Coutts, D
Object Type: Article
System: The UNT Digital Library
Industrial Assessment Center (open access)

Industrial Assessment Center

The University of Dayton (UD) performed energy assessments, trained students and supported USDOE objectives. In particular, the UD Industrial Assessment Center (IAC) performed 96 industrial energy assessment days for mid-sized manufacturers. The average identified and implemented savings on each assessment were $261,080 per year and $54,790 per year. The assessments served as direct training in industrial energy efficiency for 16 UD IAC students. The assessments also served as a mechanism for the UD IAC to understand manufacturing energy use and improve upon the science of manufacturing energy efficiency. Specific research results were published in 16 conference proceedings and journals, disseminated in 22 additional invited lectures, and shared with the industrial energy community through the UD IAC website.
Date: April 17, 2007
Creator: Kissock, J. Kelly & Blust, Becky
Object Type: Report
System: The UNT Digital Library
Behavior of the Diamond Difference and Low-Order Nodal Numerical Transport Methods in the Thick Diffusion Limit for Slab Geometry (open access)

Behavior of the Diamond Difference and Low-Order Nodal Numerical Transport Methods in the Thick Diffusion Limit for Slab Geometry

The objective of this work is to investigate the thick diffusion limit of various spatial discretizations of the one-dimensional, steady-state, monoenergetic, discrete ordinates neutron transport equation. This work specifically addresses the two lowest order nodal methods, AHOT-N0 and AHOT-N1, as well as reconsiders the asymptotic limit of the Diamond Difference method. The asymptotic analyses of the AHOT-N0 and AHOT-N1 nodal methods show that AHOT-N0 does not possess the thick diffusion limit for cell edge or cell average fluxes except under very limiting conditions, which is to be expected considering the AHOT-N0 method limits to the Step method in the thick diffusion limit. The AHOT-N1 method, which uses a linear in-cell representation of the flux, was shown to possess the thick diffusion limit for both cell average and cell edge fluxes. The thick diffusion limit of the DD method, including the boundary conditions, was derived entirely in terms of cell average scalar fluxes. It was shown that, for vacuum boundaries, only when {sigma}{sub t}, h, and Q are constant and {sigma}{sub a} = 0 is the asymptotic limit of the DD method close to the finite-differenced diffusion equation in the system interior, and that the boundary conditions between the systems will …
Date: April 17, 2007
Creator: Gill, D. F.
Object Type: Thesis or Dissertation
System: The UNT Digital Library