7Be(p,(gamma))8B S-factor from Ab Initio No-Core Shell Model Wave Functions (open access)

7Be(p,(gamma))8B S-factor from Ab Initio No-Core Shell Model Wave Functions

Nuclear structure of {sup 7}Be, {sup 8}B and {sup 7,8}Li is studied within the ab initio no-core shell model (NCSM). Starting from high-precision nucleon-nucleon (NN) interactions, wave functions of {sup 7}Be and {sup 8}B bound states are obtained in basis spaces up to 10 h bar{Omega} and used to calculate channel cluster form factors (overlap integrals) of the {sup 8}B ground state with {sup 7}Be+p. Due to the use of the harmonic oscillator (HO) basis, the overlap integrals have incorrect asymptotic properties. We fix this problem in two alternative ways. First, by a Woods-Saxon (WS) potential solution fit to the interior of the NCSM overlap integrals. Second, by a direct matching with the Whittaker function. The corrected overlap integrals are then used for the {sup 7}Be(p,{gamma}){sup 8}B S-factor calculation. We study the convergence of the S-factor with respect to the NCSM HO frequency and the model space size. Our S-factor results are in agreement with recent direct measurement data. We also test the spectroscopic factors and the corrected overlap integrals from the NCSM in describing the momentum distributions in knockout reactions with {sup 8}B projectiles. A good agreement with the available experimental data is also found, attesting the overall consistency …
Date: December 2, 2005
Creator: Navratil, P; Bertulani, C A & Caurier, E
Object Type: Article
System: The UNT Digital Library
Application of a Multidimensional Wavelet Denoising Algorithm for the Detection and Characterization of Astrophysical Sources of Gamma Rays (open access)

Application of a Multidimensional Wavelet Denoising Algorithm for the Detection and Characterization of Astrophysical Sources of Gamma Rays

Zhang, Fadili, & Starck have recently developed a denoising procedure for Poisson data that offers advantages over other methods of intensity estimation in multiple dimensions. Their procedure, which is nonparametric, is based on thresholding wavelet coefficients. The restoration algorithm applied after thresholding provides good conservation of source flux. We present an investigation of the procedure of Zhang et al. for the detection and characterization of astrophysical sources of high-energy gamma rays, using realistic simulated observations with the Large Area Telescope (LAT). The LAT is to be launched in late 2007 on the Gamma-ray Large Area Space Telescope mission. Source detection in the LAT data is complicated by the low fluxes of point sources relative to the diffuse celestial background, the limited angular resolution, and the tremendous variation of that resolution with energy (from tens of degrees at {approx}30 MeV to 0.1{sup o} at 10 GeV). The algorithm is very fast relative to traditional likelihood model fitting, and permits immediate estimation of spectral properties. Astrophysical sources of gamma rays, especially active galaxies, are typically quite variable, and our current work may lead to a reliable method to quickly characterize the flaring properties of newly-detected sources.
Date: December 2, 2005
Creator: Digel, S. W.; /SLAC; Zhang, B.; Chiang, J.; U., /Maryland; Fadili, J. M. et al.
Object Type: Article
System: The UNT Digital Library
An Archaeological Survey of the Proposed Burleson Bicycle Trails (open access)

An Archaeological Survey of the Proposed Burleson Bicycle Trails

An archaeological survey of 2.8 miles of bicycle trails in the city of Burleson.
Date: December 2, 2005
Creator: Todd, Jesse
Object Type: Report
System: The Portal to Texas History
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research (Naval Warfare Development Command) Newport, RI, by David Epstein of the NAVY Team. Part 2 of 2(DCN:11705)
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research(FINAL Report documents)Various States by the INTERAGENCY TEAM. Part 2 of 2
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research (651 MUNS Briefing) Lackland, AFB TX, by Art Beauchamp of the AIR FORCE Team.
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research (General) NUWC Newport, RI by David Epstein of the NAVY Team.
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research (NSWC Indian Head Detachment Louisville, KY) by David Epstein of the NAVY Team.
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research (General) NASVSTA Newport, RI by David Epstein of the NAVY Team.
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
BRAC Analysis-Notes and Research (open access)

BRAC Analysis-Notes and Research

Contains notes and research (Naval Warfare Development Command) Newport RI, by David Epstein of the NAVY TEAM. Part 1 of 2(DCN:11706)
Date: December 2, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
Object Type: Text
System: The UNT Digital Library
Civil Rights of Individuals with Disabilities: The Opinions of Judge Alito (open access)

Civil Rights of Individuals with Disabilities: The Opinions of Judge Alito

Judge Samuel Alito Jr. was nominated by President Bush to the U.S. Supreme Court on October 31, 2005. This report examines the opinions written by Judge Alito relating to civil rights for individuals with disabilities and includes a discussion of cases relating to the Americans with Disabilities Act (ADA), the Individuals with Disabilities Education Act (IDEA), section 504 of the Rehabilitation Act of 1973, and the Fair Housing Amendments Act. In addition, Judge Alito’s federalism decisions are briefly analyzed and their potential impact on disability related issues is discussed. Decisions authored by Judge Alito, as well as selected dissents and decisions where he joined the majority are examined.
Date: December 2, 2005
Creator: Jones, Nancy Lee
Object Type: Report
System: The UNT Digital Library
Combating Charitable Fraud: An Overview of State and Federal Law (open access)

Combating Charitable Fraud: An Overview of State and Federal Law

This report will provide a brief overview of the regulation of charitable fundraising and federal and state government efforts to combat charity fraud, including state statutes requiring the registration of charities and professional fundraisers and statutes addressing fraudulent solicitations.
Date: December 2, 2005
Creator: Welborn, Angie A. & Muhlfeld, Alison
Object Type: Report
System: The UNT Digital Library
Design and evaluation of Nemesis, a scalable, low-latency, message-passing communication subsystem. (open access)

Design and evaluation of Nemesis, a scalable, low-latency, message-passing communication subsystem.

This paper presents a new low-level communication subsystem called Nemesis. Nemesis has been designed and implemented to be scalable and efficient both in the intranode communication context using shared-memory and in the internode communication case using high-performance networks and is natively multimethod-enabled. Nemesis has been integrated in MPICH2 as a CH3 channel and delivers better performance than other dedicated communication channels in MPICH2. Furthermore, the resulting MPICH2 architecture outperforms other MPI implementations in point-to-point benchmarks.
Date: December 2, 2005
Creator: Buntinas, D.; Mercier, G. & Gropp, W.
Object Type: Report
System: The UNT Digital Library
Determination of MSSM Parameters from LHC and ILCObservables in a Global Fit (open access)

Determination of MSSM Parameters from LHC and ILCObservables in a Global Fit

We present the results of a realistic global fit of the Lagrangian parameters of the Minimal Supersymmetric Standard Model assuming universality for the first and second generation and real parameters. No assumptions on the SUSY breaking mechanism are made. The fit is performed using the precision of future mass measurements of superpartners at the LHC and mass and polarized topological cross-section measurements at the ILC. Higher order radiative corrections are accounted for wherever possible to date. Results are obtained for a modified SPS1a MSSM benchmark scenario but they were checked not to depend critically on this assumption. Exploiting a simulated annealing algorithm, a stable result is obtained without any a priori assumptions on the values of the fit parameters. Most of the Lagrangian parameters can be extracted at the percent level or better if theoretical uncertainties are neglected. Neither LHC nor ILC measurements alone will be sufficient to obtain a stable result. The effects of theoretical uncertainties arising from unknown higher-order corrections and parametric uncertainties are examined qualitatively. They appear to be relevant and the result motivates further precision calculations. The obtained parameters at the electroweak scale are used for a fit of the parameters at high energy scales within …
Date: December 2, 2005
Creator: Bechtle, Philip; /SLAC; Desch, Klaus; U., /Freiburg; Porod, Werner; /Valencia U., IFIC /Zurich U. et al.
Object Type: Article
System: The UNT Digital Library
Exact Solution of the Isovector Proton Neutron Pairing Hamiltonian (open access)

Exact Solution of the Isovector Proton Neutron Pairing Hamiltonian

The complete exact solution of the T = 1 neutron-proton pairing Hamiltonian is presented in the context of the SO(5) Richardson-Gaudin model with non-degenerate single-particle levels and including isospin-symmetry breaking terms. The power of the method is illustrated with a numerical calculation for {sup 64}Ge for a pf + g{sub 9/2} model space which is out of reach of modern shell-model codes.
Date: December 2, 2005
Creator: Dukelsky, J.; Gueorguiev, V. G.; Van Isacker, P.; Dimitrova, S. S.; Errea, B. & Lerma H., S.
Object Type: Article
System: The UNT Digital Library
Exclusive Two-Photon Processes in QCD (open access)

Exclusive Two-Photon Processes in QCD

Hadron pair production from two-photon annihilation plays an important role in unraveling the perturbative and non-perturbative structure of QCD, first by testing the validity and empirical applicability of leading-twist factorization theorems, second by verifying the structure of the underlying perturbative QCD subprocesses, and third, through measurements of angular distributions and ratios which are sensitive to the shape of the distribution amplitudes. In effect, photon-photon collisions provide a microscope for testing fundamental scaling laws of PQCD and for measuring distribution amplitudes. The determination of the shape and normalization of the distribution amplitude is particularly important in view of their importance in the analysis of exclusive semi-leptonic and two-body hadronic B-decays. The data from the Belle and CLEO collaborations on single and double meson production are in excellent agreement with the QCD predictions. In contrast, the normalization of the nominal leading-order predictions of PQCD for proton pair production appears to be significantly below recent Belle measurements. I also review issues relating to renormalization scale setting.
Date: December 2, 2005
Creator: Brodsky, Stanley J.
Object Type: Article
System: The UNT Digital Library
EXTENDING PRESSURE RELIEF VALVE INSPECTION INTERVALS BY USING STATISTICAL ANALYSIS OF PROOF TEST DATA (open access)

EXTENDING PRESSURE RELIEF VALVE INSPECTION INTERVALS BY USING STATISTICAL ANALYSIS OF PROOF TEST DATA

None
Date: December 2, 2005
Creator: GROSS, ROBERT
Object Type: Article
System: The UNT Digital Library
Extrinsic Paramagnetic Meissner Effect in Multiphase Indium-Tin Alloys (open access)

Extrinsic Paramagnetic Meissner Effect in Multiphase Indium-Tin Alloys

A well-known effect in superconducting materials below their critical temperatures (T{sub c}) is the reduction to zero of their electrical resistivities. Concomitantly, the materials become perfect diamagnets for small fields. This effect, termed the Meissner Effect, allows for the direct measurement of the transition temperature (T{sub c}) by magnetic techniques such as the superconducting quantum interference device (SQUID). A Paramagnetic Meissner Effect (PME), i.e., the unexpected observation of positive magnetic moment in a superconductor below its critical temperature during field cooling (FC), was first reported in 1989 by Svedlindh et al. (1). The origin of PME in high T{sub c} superconductors has been discussed by numerous investigators as possibly resulting from {pi}-junctions, d-wave behavior, giant vortex states, flux compression, or weak links. In conventional superconductors like Nb, the PME was ascribed to the inhomogeneous nature of such samples, whereby their surface is sufficiently different from the interior and becomes superconducting at a higher temperature than the interior on cooling, thereby trapping the magnetic flux. There remains significant controversy regarding the fundamental origin of the PME. Here, we show that the PME in two-phase and three-phase In-Sn alloys is a property resulting from the morphological distribution of the multiple phases. We …
Date: December 2, 2005
Creator: Chu, S; Schwartz, A J; Massalski, T B & Laughlin, D E
Object Type: Article
System: The UNT Digital Library
Federal Employees Health Benefits Program: Differences in Health Care Prices Across Metropolitan Areas Linked to Competition and Other Factors (open access)

Federal Employees Health Benefits Program: Differences in Health Care Prices Across Metropolitan Areas Linked to Competition and Other Factors

Testimony issued by the Government Accountability Office with an abstract that begins "Differences in utilization of health care services across the country have been well documented, but less has been reported on geographic variation in price. As health care spending is the product of utilization and price, information on health care prices and factors contributing to price differences provides an additional perspective on drivers of health care spending. In an August 2005 report, GAO examined claims data on enrollees of preferred provider organizations (PPO) participating in the Federal Employees Health Benefits Program (FEHBP) and found substantial price variation across metropolitan areas, after adjusting prices to account for area differences in the cost of providing services and in the types of services provided. This statement is based on GAO's August 2005 report entitled Federal Employees Health Benefits Program: Competition and Other Factors Linked to Wide Variation in Health Care Prices (GAO-05-856). It focuses on (1) factors that underlie area differences in price and (2) the contribution of price to geographic differences in spending on health care."
Date: December 2, 2005
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Final Technical Report (open access)

Final Technical Report

The City of Albuquerque Aviation Department began planning for an alternative fuels facility in 1999 and began actively pursuing funding for the project in 2000. The original project scope was intended to provide a fueling station that provided unleaded gasoline, E-85, diesel, compressed natural gas (CNG) and propane. When the tragedy of 9/11 occurred, all capital projects were put on hold and then reassessed to validate needs and priorities. The alternative fuels station was scaled back to a CNG facility to: (1) Provide fuel for the common shuttle that served the rental car facilities at the airport; (2) Provide a CNG fuel center for use by all levels of government for vehicle fueling; (3) Provide another CNG facility near the interstate to improve the State network for CNG fueling; (4) Provide a backup fueling facility for the University of New Mexico and the City of Albuquerque Transit Department who were also using CNG vehicles; and (5) Provide another fueling facility accessible to the general public.
Date: December 2, 2005
Creator: Hinde, Jim
Object Type: Report
System: The UNT Digital Library
Graphene Layer Growth: Collision of Migrating Five-MemberRings (open access)

Graphene Layer Growth: Collision of Migrating Five-MemberRings

A reaction pathway is explored in which two cyclopenta groups combine on the zigzag edge of a graphene layer. The process is initiated by H addition to a five-membered ring, followed by opening of that ring and the formation of a six-membered ring adjacent to another five-membered ring. The elementary steps of the migration pathway are analyzed using density functional theory to examine the region of the potential energy surface associated with the pathway. The calculations are performed on a substrate modeled by the zigzag edge of tetracene. Based on the obtained energetics, the dynamics of the system are analyzed by solving the energy transfer master equations. The results indicate energetic and reaction-rate similarity between the cyclopenta combination and migration reactions. Also examined in the present study are desorption rates of migrating cyclopenta rings which are found to be comparable to cyclopenta ring migration.
Date: December 2, 2005
Creator: Whitesides, Russell; Kollias, Alexander C.; Domin, Dominik; Lester Jr., William A. & Frenklach, Michael
Object Type: Article
System: The UNT Digital Library
The Linac Coherent Light Source at SLAC. Radiological Considerations and Shielding calculations (open access)

The Linac Coherent Light Source at SLAC. Radiological Considerations and Shielding calculations

The Linac Coherent Light Source (LCLS) at SLAC will be the world's first X-ray free electron laser when it becomes operational in 2009. Pulses of X-ray laser light from LCLS will be many orders of magnitude brighter and several orders of magnitude shorter than what can be produced by other X-ray sources available in the world. These characteristics will enable frontier new science in many areas. This paper describes the LCLS beam parameters and its lay-out. Results of the Monte Carlo calculations for the shielding design of the electron dump line, radiation damage to undulator, the residual radiation and the soil activation around the electron dump are presented.
Date: December 2, 2005
Creator: Mao, X. S.; Fasso, A.; Nakao, N.; Rokni, S. H. & Vincke, H.
Object Type: Article
System: The UNT Digital Library
Medicaid and the State Fiscal Crisis of 2000-2003 (open access)

Medicaid and the State Fiscal Crisis of 2000-2003

None
Date: December 2, 2005
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Parental Notification and Ayotte v. Planned Parenthood of Northern New England (open access)

Parental Notification and Ayotte v. Planned Parenthood of Northern New England

None
Date: December 2, 2005
Creator: Shimabukuro, Jon O.
Object Type: Report
System: The UNT Digital Library