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2006 National Ambient Air Quality Standards (NAAQS) for Fine Particulate Matter (PM2.5): Designating Nonattainment Areas
This report summarizes and describes the EPA's (Environmental Protection Agency) final revisions to the NAAQS (National Ambient Air Quality Standards). The summary also explores how the revisions are contentious in certain areas that may not be meeting those standards which materializes as congressional oversight.
Date:
December 17, 2009
Creator:
Esworthy, Robert
Object Type:
Report
System:
The UNT Digital Library
CHARACTERIZATION OF TANK 19F SAMPLES
The Savannah River National Laboratory (SRNL) was asked by Liquid Waste Operations to characterize Tank 19F closure samples. Tank 19F slurry samples analyzed included the liquid and solid fractions derived from the slurry materials along with the floor scrape bottom Tank 19F wet solids. These samples were taken from Tank 19F in April 2009 and made available to SRNL in the same month. Because of limited amounts of solids observed in Tank 19F samples, the samples from the north quadrants of the tank were combined into one Tank 19F North Hemisphere sample and similarly the south quadrant samples were combined into one Tank 19F South Hemisphere sample. These samples were delivered to the SRNL shielded cell. The Tank 19F samples were analyzed for radiological, chemical and elemental components. Where analytical methods yielded additional contaminants other than those requested by the customer, these results were also reported. The target detection limits for isotopes analyzed were based on detection values of 1E-04 {micro}Ci/g for most radionuclides and customer desired detection values of 1E-05 {micro}Ci/g for I-129, Pa-231, Np-237, and Ra-226. While many of the target detection limits, as specified in the technical task request and task technical and quality assurance plans were …
Date:
December 17, 2009
Creator:
Oji, L.; Diprete, D. & Click, D.
Object Type:
Report
System:
The UNT Digital Library
CHARACTERIZATION OF THE TANK 18F SAMPLES
The Savannah River National Laboratory (SRNL) was asked by Liquid Waste Operations to characterize Tank 18F closure samples. Tank 18F slurry samples analyzed included the liquid and solid fractions derived from the 'as-received' slurry materials along with the floor scrape bottom Tank 18F wet solids. These samples were taken from Tank 18F in March 2009 and made available to SRNL in the same month. Because of limited amounts of solids observed in Tank 18F samples, the samples from the north quadrants of the tank were combined into one North Tank 18F Hemisphere sample and similarly the south quadrant samples were combined into one South Tank 18F Hemisphere sample. These samples were delivered to the SRNL shielded cell. The Tank 18F samples were analyzed for radiological, chemical and elemental components. Where analytical methods yielded additional contaminants other than those requested by the customer, these results were also reported. The target detection limits for isotopes analyzed were 1E-04 {micro}Ci/g for most radionuclides and customer desired detection values of 1E-05 {micro}Ci/g for I-129, Pa-231, Np-237, and Ra-226. While many of the minimum detection limits, as specified in the technical task request and task technical and quality assurance plans were met for the species …
Date:
December 17, 2009
Creator:
Oji, L.; Click, D. & Diprete, D.
Object Type:
Report
System:
The UNT Digital Library
Construction of Large Period Symplectic Maps by Interpolative Methods
The goal is to construct a symplectic evolution map for a large section of an accelerator, say a full turn of a large ring or a long wiggler. We start with an accurate tracking algorithm for single particles, which is allowed to be slightly non-symplectic. By tracking many particles for a distance S one acquires sufficient data to construct the mixed-variable generator of a symplectic map for evolution over S, given in terms of interpolatory functions. Two ways to find the generator are considered: (1) Find its gradient from tracking data, then the generator itself as a line integral. (2) Compute the action integral on many orbits. A test of method (1) has been made in a difficult example: a full turn map for an electron ring with strong nonlinearity near the dynamic aperture. The method succeeds at fairly large amplitudes, but there are technical difficulties near the dynamic aperture due to oddly shaped interpolation domains. For a generally applicable algorithm we propose method (2), realized with meshless interpolation methods.
Date:
December 17, 2009
Creator:
Warnock, Robert; Cai, Yunhai & Ellison, James A.
Object Type:
Article
System:
The UNT Digital Library
Digital Divide in Sub-Saharan African Universities: Recommendations and Monitoring
The Digital Divide prevents Africa from taking advantages of new information technologies. One of the most urgent priorities is to bring the Internet in African Universities, Research, and Learning Centers to the level of other regions of the world. eGY-Africa, and the Sharing Knowledge Foundation are two bottom-up initiatives by scientists to secure better cyber-infrastructure and Internet facilities in Africa. Recommendations by the present scientific communities are being formulated at national, regional and international levels. The Internet capabilities are well documented at country level overall, but this is not the case at the University level. The snapshot of the Internet status in universities in 17 African countries, obtained by a questionnaire survey, is consistent with measures of Internet penetration in the corresponding country. The monitoring of Internet performance has been proposed to those African universities to provide an information base for arguing the need to improve the coverage for Africa. A pilot program is recommended that will start scientific collaboration with Europe in western Africa using ICT. The program will lay the foundations for the arrival of new technologies like Grids.
Date:
December 17, 2009
Creator:
Barry, Boubakar; Chukwuma, Victor; Petitdidier, Monique; Cottrell, Les & Bartons, Charles
Object Type:
Article
System:
The UNT Digital Library
DOD Civilian Personnel: Intelligence Personnel System Incorporates Safeguards, but Opportunities Exist for Improvement
A letter report issued by the Government Accountability Office with an abstract that begins "Since 2001, Government Accountability Office (GAO) has designated strategic human capital management as a high-risk area because of the federal government's long-standing lack of a consistent approach to such management. In 2007, the Under Secretary of Defense for Intelligence (USD(I)) began developing a human capital system--called the Defense Civilian Intelligence Personnel System (DCIPS)--to manage Department of Defense (DOD) civilian intelligence personnel. In response to a congressional request, GAO examined the extent to which DOD has (1) incorporated internal safeguards into DCIPS and monitored the implementation of these safeguards and (2) developed mechanisms to identify employee perceptions about DCIPS. GAO analyzed guidance, interviewed appropriate officials, and conducted discussion groups with employees at select DOD components. At the end of GAO's review, legislation was enacted that impacts, among other things, how DCIPS employees will be paid."
Date:
December 17, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Evaluating Cumulative Ecosystem Response to Restoration Projects in the Lower Columbia River and Estuary, 2008
Draft annual report for the Cumulative Effects Study for the US Army Corps of Engineers, Portland District
Date:
December 17, 2009
Creator:
Johnson, Gary E.; Diefenderfer, Heida L.; Borde, Amy B.; Dawley, Earl M.; Ebberts, Blaine D.; Roegner, G. Curtis et al.
Object Type:
Report
System:
The UNT Digital Library
FCC Management: Improvements Needed in Communication, Decision-Making Processes, and Workforce Planning
A letter report issued by the Government Accountability Office with an abstract that begins "Rapid changes in the telecommunications industry, such as the development of broadband technologies, present new regulatory challenges for the Federal Communications Commission (FCC). Government Accountability Office (GAO) was asked to determine (1) the extent to which FCC's bureau structure presents challenges for the agency in adapting to an evolving marketplace; (2) the extent to which FCC's decision-making processes present challenges for FCC, and what opportunities, if any, exist for improvement; and (3) the extent to which FCC's personnel management and workforce planning efforts face challenges in ensuring that FCC has the workforce needed to achieve its mission. GAO reviewed FCC documents and data and conducted literature searches to identify proposed reforms, criteria, and internal control standards and compared them with FCC's practices. GAO also interviewed current and former FCC chairmen and commissioners, industry stakeholders, academic experts, and consumer representatives."
Date:
December 17, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Focusing DIRC Design for Super B
In this paper we present a new design of the Focusing DIRC for the Barrel PID to be used at the proposed Super-B factory. The new imaging optics is made of a solid Fused Silica block with a double folded optics using two mirrors, one cylindrical and one flat, focusing photons on a detector plane conveniently accessible for the detector access. The design assumes that the BaBar bar boxes are re-used without any modification, including the wedges and windows. Each bar box will have its own focusing block, which will contain 40 H-9500 (or H-8500) MaPMTs according to present thinking. There are 12 bar boxes in the entire detector, so the entire SuperB FDIRC system would have 480 MaPMTs. The design is very compact and therefore reduces sensitivity to the background. The chosen MaPMTs are fast enough to be able both to reject the background and to perform the chromatic correction. The 3D optics simulation is coded with the Mathematica program. The work in this paper was a basis of the LDRD proposal made to SLAC in 2009 [1].
Date:
December 17, 2009
Creator:
Va'Vra, J.
Object Type:
Report
System:
The UNT Digital Library
Higher-Twist Dynamics in Large Transverse Momentum Hadron Production
A scaling law analysis of the world data on inclusive large-p{sub {perpendicular}} hadron production in hadronic collisions is carried out. A significant deviation from leading-twist perturbative QCD predictions at next-to-leading order is reported. The observed discrepancy is largest at high values of x{sub {perpendicular}} = 2p{sub {perpendicular}}/{radical}s. In contrast, the production of prompt photons and jets exhibits the scaling behavior which is close to the conformal limit, in agreement with the leading-twist expectation. These results bring evidence for a non-negligible contribution of higher-twist processes in large-p{sub {perpendicular}} hadron production in hadronic collisions, where the hadron is produced directly in the hard subprocess rather than by gluon or quark jet fragmentation. Predictions for scaling exponents at RHIC and LHC are given, and it is suggested to trigger the isolated large-p{sub {perpendicular}} hadron production to enhance higher-twist processes.
Date:
December 17, 2009
Creator:
Arleo, Francois; Brodsky, Stanley J.; Hwang, Dae Sung & Sickles, Anne M.
Object Type:
Article
System:
The UNT Digital Library
Juvenile Justice: DOJ Is Enhancing Information on Effective Programs, but Could Better Assess the Utility of This Information
A letter report issued by the Government Accountability Office with an abstract that begins "State juvenile justice systems face critical problems when it comes to juvenile delinquency issues such as reentry--when offenders return home from incarceration--and substance abuse. GAO was asked to review juvenile reentry and substance abuse program research and efforts by the Department of Justice's (DOJ) Office of Juvenile Justice and Delinquency Prevention (OJJDP) to provide information on effective programs (i.e., whether a program achieves its intended goal) and cost-beneficial programs (i.e., whether the benefits of programs exceeded their costs). This report addresses (1) expert opinion and available research on these types of reentry and substance abuse programs, (2) the extent to which OJJDP assesses its efforts to disseminate information on effective programs, and (3) OJJDP's plans to accomplish its research and evaluation goals. GAO, among other things, reviewed academic literature, and OJJDP's dissemination efforts and research goals. GAO also interviewed OJJDP officials and a nonprobability sample of 26 juvenile justice experts selected based on their experience with juvenile reentry and substance abuse issues."
Date:
December 17, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Measurement of D0 lifetime with the BaBar detector
This work is the result of the researchers carried out during a three years Ph.D. period in the BABAR experiment. The first chapter consists in an introduction to the theoretical aspects of the D{sup 0} meson lifetime determination and CP violation parameters, as well as an overview of the CP violation in the B sector, which is the main topic of the experiment. The description of the experimental apparatus follows with particular attention to the Silicon Vertex Tracker detector, the most critical detector for the determination of decay vertices and thus of lifetimes and time dependent CP violation asymmetries. In the fourth chapter the operation and running of the vertex detector is described, as a result from the experience as Operation Manager of the SVT, with particular attention to the safety of the device and the data quality assurance. The last chapter is dedicated to the determination of the D{sup 0} meson lifetime with the BABAR detector, which is the main data analysis carried out by the candidate. The analysis is characterized by the selection of an extremely pure sample of D{sup 0} mesons for which the decay flight length and proper time is reconstructed. The description of the unbinned …
Date:
December 17, 2009
Creator:
Simi, Gabriele & /SLAC, /Pisa U.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Measurement of the B-bar 0 to D^* l ^- nu-bar Branching Fraction with a Partial Reconstruction Technique
Presented is a precise measurement of the {bar B}{sup 0} {yields} D*{sup +}{ell}{sup -}{bar {nu}}{sub {ell}} branching fraction using 81.47 fb{sup -1} of data collected with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring at the Stanford Linear Accelerator Center. The measurement was performed by partially reconstructing the D*{sup +} meson from {bar B}{sup 0} {yields} D*{sup +}{ell}{sup -}{bar {nu}}{sub {ell}} decays using only the soft pion of the D*{sup +} {yields} D{sup 0}{pi}{sup +} decay to reconstruct its four vector. The branching fraction was measured to be {Beta}({bar B}{sup 0} {yields} D*{sup +}{ell}{sup -}{bar {nu}}{sub {ell}}) = (4.91 {+-} 0.01{sub stat} {+-} 0.15{sub syst})%.
Date:
December 17, 2009
Creator:
Sonnek, Peter & U., /Mississippi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Measurements of the LCLS Laser Heater and its impact on the x-ray FEL Performance
The very bright electron beam required for an x-ray free-electron laser (FEL), such as the Linac Coherent Light Source (LCLS), is susceptible to a microbunching instability in the magnetic bunch compressors, prior to the FEL undulator. The uncorrelated electron energy spread in the LCLS can be increased by an order of magnitude to provide strong Landau damping against the instability without degrading the FEL performance. To this end, a 'laser-heater' system has been installed in the LCLS injector, which modulates the energy of a 135-MeV electron bunch with an IR laser beam in a short undulator, enclosed within a four-dipole chicane. In this paper, we report detailed measurements of laser heater-induced energy spread, including the unexpected self-heating phenomenon when the laser energy is very low. We discuss the suppression of the microbunching instability with the laser heater and its impact on the x-ray FEL performance. We also present the analysis of these experimental results and develop a three-dimensional longitudinal space charge model to explain the self-heating effect.
Date:
December 17, 2009
Creator:
Huang, Zhirong; Brachmann, A.; Decker, F. J.; Ding, Y.; Dowell, D.; Emma, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Medicare Advantage: CMS Assists Beneficiaries Affected by Inappropriate Marketing but Has Limited Data on Scope of Issue
A letter report issued by the Government Accountability Office with an abstract that begins "Members of Congress and state agencies have raised questions about complaints that some Medicare Advantage (MA) organizations and their agents inappropriately marketed their health plans to Medicare beneficiaries. Inappropriate marketing may include activities such as providing inaccurate information about covered benefits and conducting prohibited marketing practices. The Centers for Medicare & Medicaid Services (CMS) is responsible for oversight of MA organizations and their plans. The Government Accountability Office (GAO) was asked to examine (1) the extent to which CMS has taken compliance and enforcement actions, (2) how CMS has helped beneficiaries affected by inappropriate marketing and the problems beneficiaries have encountered, and (3) information CMS has about the extent of inappropriate marketing. To do this work, GAO reviewed relevant laws and policies; analyzed Medicare data on beneficiary complaints, compliance actions and enforcement actions; and interviewed officials from CMS and selected state departments of insurance, state health insurance assistance programs, and MA organizations."
Date:
December 17, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Observation of the Inclusive D^{* -} Production in the Decay of Y(1S)
The authors present a study of the inclusive D*{sup {+-}} production in the decay of {Upsilon}(1S) using (98.6 {+-} 0.9) x 10{sup 6} {Upsilon}(2S) mesons collected with the BABAR detector at the {Upsilon}(2S) resonance. Using the decay chain {Upsilon}(2S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(1S), {Upsilon}(1S) {yields} D*{sup {+-}}X, where X is unobserved, they measure the branching fraction {Beta}[{Upsilon}(1S) {yields} D*{sup {+-}}X] = (2.52 {+-} 0.13(stat) {+-} 0.15(syst))% and the D*{sup {+-}} momentum distribution in the rest frame of the {Upsilon}(1S). They find evidence for an excess of D*{sup {+-}} production over the expected rate from the virtual photon annihilation process {Upsilon}(1S) {yields} {gamma}* {yields} c{bar c} {yields} D*{sup {+-}} X.
Date:
December 17, 2009
Creator:
Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X. et al.
Object Type:
Article
System:
The UNT Digital Library
The Quasiparticle Puzzle: Reconciling ARPES and FTSTS Studies of Bi2212
Angle Resolved Photoemission Spectroscopy (ARPES) probes the momentum-space electronic structure of materials, and provides invaluable information about the high-temperature superconducting cuprates. Likewise, cuprates real-space, inhomogeneous electronic structure is elucidated by Scanning Tunneling Spectroscopy (STS). Recently, STS has exploited quasiparticle interference (QPI) - wave-like electrons scattering off impurities to produce periodic interference patterns - to infer properties of the QP in momentum-space. Surprisingly, some interference peaks in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} (Bi-2212) are absent beyond the antiferromagnetic (AF) zone boundary, implying the dominance of particular scattering process. Here, we show that ARPES sees no evidence of quasiparticle (QP) extinction: QP-like peaks are measured everywhere on the Fermi surface, evolving smoothly across the AF zone boundary. This apparent contradiction stems from different natures of single-particle (ARPES) and two-particle (STS) processes underlying these probes. Using a simple model, we demonstrate extinction of QPI without implying the loss of QP beyond the AF zone boundary.
Date:
December 17, 2009
Creator:
Vishik, I. M.; Nowadnick, E. A.; Lee, W. S.; Shen, Z. X.; /Stanford U., Materials Sci. Dept. /SLAC /Stanford U., Geballe Lab. /Stanford U., Appl. Phys. Dept. /Stanford U., Phys. Dept.; Moritz, B. et al.
Object Type:
Article
System:
The UNT Digital Library
A Search for B -> tau nu Recoiling Against B- -> D0 l- nu X
The authors present a search for the decay B{sup +} {yields} {ell}{sup +}{nu}{sub {ell}} ({ell} = {tau}, {mu}, or e) in (458.9 {+-} 5.1) x 10{sup 6} B{bar B} pairs recorded with the BABAR detector at the PEP-II B-Factory. They search for these B decays in a sample of B{sup +}B{sup -} events where one B-meson is reconstructed as B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}X. Using the method of Feldman and Cousins, they obtain {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) = (1.7 {+-} 0.8 {+-} 0.2) x 10{sup -4}, which excludes zero at 2.3{sigma}. They interpret the central value in the context of the Standard Model and find the B meson decay constant to be f{sub B}{sup 2} = (62 {+-} 31) x 10{sup 3} MeV{sup 2}. They find no evidence for B{sup +} {yields} e{sup +}{nu}{sub e} and B{sup +} {yields} {mu}{sup +}{nu}{sub {mu}} and set upper limits at the 90% C.L. {Beta}(B{sup +} {yields} e{sup +}{nu}{sub e}) < 0.8 x 10{sup -5} and {Beta}(B{sup +} {yields} {mu}{sup +}{nu}{sub {mu}}) < 1.1 x 10{sup -5}.
Date:
December 17, 2009
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
SLUDGE CHARACTERIZATION AND SRAT SIMULATIONS USING A NITRITE-FREE SLUDGE SIMULANT
Understanding catalytic hydrogen generation is fundamental to the safe operation of the Defense Waste Processing Facility (DWPF) Chemical Process Cell (CPC). Two Sludge Receipt and Adjustment Tank (SRAT) simulations were completed at the Aiken County Technology Laboratory (ACTL) of the Savannah River National Laboratory (SRNL) using a nitrite-free starting simulant. One simulation was trimmed with Rh and Hg and the other with Ru and Hg. The two noble metals were trimmed at the upper end of the recent Rh-Ru-Hg study. Mercury was trimmed at 1.5 wt% in the total solids. Excess acid comparable in quantity to that in the recent Rh-Ru-Hg matrix study was used. In spite of the favorable conditions for hydrogen generation, virtually no hydrogen production was observed during either SRAT simulation. The Rh test result confirmed the postulated significance of nitrite ion to the catalytic reactions producing hydrogen in CPC testing with normal DWPF sludge simulants. As for Ru, however, previous testing has shown that Ru activated for hydrogen generation only after nitrite destruction. Therefore, Ru could have potentially been catalytically active from the start of the nitrite-free SRAT test, but no such activity was seen. The nitrite-free Ru test result suggests that the intermediate form detected …
Date:
December 17, 2009
Creator:
Koopman, D.
Object Type:
Report
System:
The UNT Digital Library
Staffing for Adequate Fire and Emergency Response: The SAFER Grant Program
This report discusses Staffing for Adequate Fire and Emergency Response (SAFER) Act, which was enacted by the 108th Congress as Section 1057 of the FY2004 National Defense Authorization Act (P.L. 108-136). It includes background of the SAFER Act, appropriations from FY2009-FY2010, reauthorization of the program in the House and Senate, and information about program implementation.
Date:
December 17, 2009
Creator:
Kruger, Lennard G.
Object Type:
Report
System:
The UNT Digital Library
Statistical Analyses of Second Indoor Bio-Release Field Evaluation Study at Idaho National Laboratory
In September 2008 a large-scale testing operation (referred to as the INL-2 test) was performed within a two-story building (PBF-632) at the Idaho National Laboratory (INL). The report “Operational Observations on the INL-2 Experiment” defines the seven objectives for this test and discusses the results and conclusions. This is further discussed in the introduction of this report. The INL-2 test consisted of five tests (events) in which a floor (level) of the building was contaminated with the harmless biological warfare agent simulant Bg and samples were taken in most, if not all, of the rooms on the contaminated floor. After the sampling, the building was decontaminated, and the next test performed. Judgmental samples and probabilistic samples were determined and taken during each test. Vacuum, wipe, and swab samples were taken within each room. The purpose of this report is to study an additional four topics that were not within the scope of the original report. These topics are: 1) assess the quantitative assumptions about the data being normally or log-normally distributed; 2) evaluate differences and quantify the sample to sample variability within a room and across the rooms; 3) perform geostatistical types of analyses to study spatial correlations; and 4) …
Date:
December 17, 2009
Creator:
Amidan, Brett G.; Pulsipher, Brent A. & Matzke, Brett D.
Object Type:
Report
System:
The UNT Digital Library
Surplus Lines Insurance: Background and Current Legislation
None
Date:
December 17, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
U.S. Nuclear Cooperation with India: Issues for Congress
This report discusses the United States' relationship with India as it relates to nuclear arsenals and nuclear nonproliferation policies. The report includes background information on India's nuclear history and nuclear weapons-specific U.S. legislation.
Date:
December 17, 2009
Creator:
Kerr, Paul K.
Object Type:
Report
System:
The UNT Digital Library
Wave Propagation in Jointed Geologic Media
Predictive modeling capabilities for wave propagation in a jointed geologic media remain a modern day scientific frontier. In part this is due to a lack of comprehensive understanding of the complex physical processes associated with the transient response of geologic material, and in part it is due to numerical challenges that prohibit accurate representation of the heterogeneities that influence the material response. Constitutive models whose properties are determined from laboratory experiments on intact samples have been shown to over-predict the free field environment in large scale field experiments. Current methodologies for deriving in situ properties from laboratory measured properties are based on empirical equations derived for static geomechanical applications involving loads of lower intensity and much longer durations than those encountered in applications of interest involving wave propagation. These methodologies are not validated for dynamic applications, and they do not account for anisotropic behavior stemming from direcitonal effects associated with the orientation of joint sets in realistic geologies. Recent advances in modeling capabilities coupled with modern high performance computing platforms enable physics-based simulations of jointed geologic media with unprecedented details, offering a prospect for significant advances in the state of the art. This report provides a brief overview of these …
Date:
December 17, 2009
Creator:
Antoun, T
Object Type:
Report
System:
The UNT Digital Library