Adam Walsh Child Protection and Safety Act: A Sketch (open access)

Adam Walsh Child Protection and Safety Act: A Sketch

This report briefly summarizes the Adam Walsh Child Protection Act. The report specifically notes the four intentions the law has such as reformulating the federal standards for sex offender registration, and amending criminal law and procedure at the federal level. Finally, the report calls for the creation of the National Child Abuse Registry which will provide regulation on child safety.
Date: April 17, 2007
Creator: Doyle, Charles
Object Type: Report
System: The UNT Digital Library
Application of a XMM-Newton EPIC Monte Carlo to Analysis And Interpretation of Data for Abell 1689, RXJ0658-55 And the Centaurus Clusters of Galaxies (open access)

Application of a XMM-Newton EPIC Monte Carlo to Analysis And Interpretation of Data for Abell 1689, RXJ0658-55 And the Centaurus Clusters of Galaxies

We propose a new Monte Carlo method to study extended X-ray sources with the European Photon Imaging Camera (EPIC) aboard XMM Newton. The Smoothed Particle Inference (SPI) technique, described in a companion paper, is applied here to the EPIC data for the clusters of galaxies Abell 1689, Centaurus and RXJ 0658-55 (the ''bullet cluster''). We aim to show the advantages of this method of simultaneous spectral-spatial modeling over traditional X-ray spectral analysis. In Abell 1689 we confirm our earlier findings about structure in temperature distribution and produce a high resolution temperature map. We also confirm our findings about velocity structure within the gas. In the bullet cluster, RXJ 0658-55, we produce the highest resolution temperature map ever to be published of this cluster allowing us to trace what looks like the motion of the bullet in the cluster. We even detect a south to north temperature gradient within the bullet itself. In the Centaurus cluster we detect, by dividing up the luminosity of the cluster in bands of gas temperatures, a striking feature to the north-east of the cluster core. We hypothesize that this feature is caused by a subcluster left over from a substantial merger that slightly displaced the …
Date: April 17, 2007
Creator: Andersson, Karl E.; /SLAC, /Stockholm U.; Peterson, J.R.; /Purdue U. /KIPAC, Menlo Park; Madejski, G.M. & /SLAC /KIPAC, Menlo Park
Object Type: Article
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
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
Demystifying an Unidentified EGRET Source by VHE gamma-ray Observations (open access)

Demystifying an Unidentified EGRET Source by VHE gamma-ray Observations

In a novel approach in observational high-energy gamma-ray astronomy, observations carried out by imaging atmospheric Cherenkov telescopes provide necessary templates to pinpoint the nature of intriguing, yet unidentified EGRET gamma-ray sources. Using GeV-photons detected by CGRO EGRET and taking advantage of high spatial resolution images from H.E.S.S. observations, we were able to shed new light on the EGRET observed gamma-ray emission in the Kookaburra complex, whose previous coverage in the literature is some-what contradictory. 3EGJ1420-6038 very likely accounts for two GeV gamma-ray sources (E>1 GeV), both in positional coincidence with the recently reported pulsar wind nebulae (PWN) by HESS in the Kookaburra/Rabbit complex. PWN associations at VHE energies, supported by accumulating evidence from observations in the radio and X-ray band, are indicative for the PSR/plerionic origin of spatially coincident, but still unidentified Galactic gamma-ray sources from EGRET. This not only supports the already suggested connection between variable, but unidentified low-latitude gamma-ray sources with pulsar wind nebulae (3EGJ1420-6038 has been suggested as PWN candidate previously), it also documents the ability of resolving apparently confused EGRET sources by connecting the GeV emission as measured from a large-aperture space-based gamma-ray instrument with narrow field-of-view but superior spatial resolution observations by ground-based atmospheric Cherenkov …
Date: April 17, 2007
Creator: Reimer, Olaf; /Stanford U., HEPL /KIPAC, Menlo Park; Funk, Stefan & /KIPAC, Menlo Park
Object Type: Article
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
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
Federal Reserve: Lender of Last Resort Functions (open access)

Federal Reserve: Lender of Last Resort Functions

This report focuses on one particular responsibility: to act as a lender of last resort to the financial system to prevent financial panics.
Date: April 17, 2007
Creator: Labonte, Marc
Object Type: Report
System: The UNT Digital Library
Final Scientific/Technical Report for Award No. DE-FC36-02GO12096 (open access)

Final Scientific/Technical Report for Award No. DE-FC36-02GO12096

This project consisted primarily of conducting energy efficiency, productivity improvement, and waste reduction assessments of small- and medium-sized industrial facilities. These assessments were carried out by groups of engineering students, mostly from Mechanical & Aerospace Engineering and Industrial Engineering, led by faculty members at Arizona State University. The assessed industries were generally energy-intensive manufacturers located throughout Arizona, as well as some facilities in the Las Vegas, Nevada area. During the first four years of the project period, on average our recommended annual savings per plant were $224,717, of which $71,135 were energy savings. Of these recommended savings, on average $49,659 were implemented, of which $31,679 were implemented annual energy savings. These implemented savings greatly exceeded our budgeted cost to DOE, which was approximately $8,000/assessment. In addition, a number of undergraduate and graduate students were employed and trained at the IAC, and have gone on to graduate studies and engineering careers.
Date: April 17, 2007
Creator: Phelan, P.E.
Object Type: Report
System: The UNT Digital Library
Final Technical Report for University of Michigan Industrial Assessment Center (open access)

Final Technical Report for University of Michigan Industrial Assessment Center

The UM Industrial Assessment Center assisted 119 primary metals, automotive parts, metal casting, chemicals, forest products, agricultural, and glass manufacturers in Michigan, Ohio and Indiana to become more productive and profitable by identifying and recommending specific measures to improve energy efficiency, reduce waste and increase productivity. This directly benefits the environment by saving a total of 309,194 MMBtu of energy resulting in reduction of 0.004 metric tons of carbon emissions. The $4,618,740 implemented cost savings generated also saves jobs that are evaporating from the manufacturing industries in the US. Most importantly, the UM Industrial Assessment Center provided extremely valuable energy education to forty one UM graduate and undergraduate students. The practical experience complements their classroom education. This also has a large multiplier effect because the students take the knowledge and training with them.
Date: April 17, 2007
Creator: Atreya, Arvind
Object Type: Report
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
Fiscal Year 2007 Homeland Security Grant Program, H.R. 1, and S. 4: Description and Analysis (open access)

Fiscal Year 2007 Homeland Security Grant Program, H.R. 1, and S. 4: Description and Analysis

None
Date: April 17, 2007
Creator: Reese, Shawn & Maguire, Steven
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
High Sensitivity Low Fluorescence Detection for Beryllium Particulates SBIR Phase I Final Report ER84587 (open access)

High Sensitivity Low Fluorescence Detection for Beryllium Particulates SBIR Phase I Final Report ER84587

Abstract: The technical objective in Phase I was to enhance the detection limit of beryllium using fluorescence system by a minimum factor of 10. This was to be achieved by modifying the chemistry and instrumentation. Both of these were completed independently. In each case we were able to lower the detection limit as desired. The objectives in Phase II are to adapt these changes for commercial activity (chemicals and instrument changes including automation).
Date: April 17, 2007
Creator: Agrawal, Anoop; Tonazzi, Juan Carlos Lopez & Cronin, John
Object Type: Report
System: The UNT Digital Library
Identification of High Energy Gamma-Ray Sources And Source Populations in the Era of Deep All-Sky Coverage (open access)

Identification of High Energy Gamma-Ray Sources And Source Populations in the Era of Deep All-Sky Coverage

A large fraction of the anticipated source detections by the Gamma-ray Large Area Space Telescope (GLAST-LAT) will initially be unidentified. We argue that traditional approaches to identify individuals and/or populations of gamma ray sources will encounter procedural limitations. Those limitations are discussed on the background of source identifications from EGRET observations. Generally, our ability to classify (faint) source populations in the anticipated GLAST dataset with the required degree of statistical confidence will be hampered by sheer source wealth. A new paradigm for achieving the classification of gamma ray source populations is discussed.
Date: April 17, 2007
Creator: Reimer, Olaf & Torres, Diego F.
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
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
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
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
MODELING VENTILATION SYSTEM RESPONSE TO FIRE (open access)

MODELING VENTILATION SYSTEM RESPONSE TO FIRE

Fires in facilities containing nuclear material have the potential to transport radioactive contamination throughout buildings and may lead to widespread downwind dispersal threatening both worker and public safety. Development and implementation of control strategies capable of providing adequate protection from fire requires realistic characterization of ventilation system response which, in turn, depends on an understanding of fire development timing and suppression system response. This paper discusses work in which published HEPA filter data was combined with CFAST fire modeling predictions to evaluate protective control strategies for a hypothetical DOE non-reactor nuclear facility. The purpose of this effort was to evaluate when safety significant active ventilation coupled with safety class passive ventilation might be a viable control strategy.
Date: April 17, 2007
Creator: Coutts, D
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
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