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Medicare: Covert Testing Exposes Weaknesses in the Durable Medical Equipment Supplier Screening Process

Description: A letter report issued by the Government Accountability Office with an abstract that begins "According to the Department of Health and Human Services (HHS), schemes to defraud the Medicare program have grown more elaborate in recent years. In particular, HHS has acknowledged Centers for Medicare & Medicaid Service's (CMS) oversight of suppliers of durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS) is inadequate to prevent fraud and abuse. Specifically, weaknesses in the DM… more
Date: July 3, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microwave Transmission Measurements of the Electron Cloud Density In The Positron Ring of PEP-II

Description: Clouds of electrons in the vacuum chambers of accelerators of positively charged particle beams present a serious limitation for operation of these machines at high currents. Because of the size of these accelerators, it is difficult to probe the low energy electron clouds over substantial lengths of the beam pipe. We applied a novel technique to directly measure the electron cloud density via the phase shift induced in a TE wave which is independently excited and transmitted over a straight se… more
Date: July 3, 2008
Creator: Pivi, M. T. F.; Krasnykh, A. K; Byrd, J.; Santis, S.De; Sonnad, K. G.; Caspers, F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A New Chicane Experiment In PEP-II to Test Mitigations of the Electron Cloud Effect for Linear Colliders

Description: Beam instability caused by the electron cloud has been observed in positron and proton storage rings, and it is expected to be a limiting factor in the performance of future colliders [1-3]. The effect is expected to be particularly severe in magnetic field regions. To test possible mitigation methods in magnetic fields, we have installed a new 4-dipole chicane experiment in the PEP-II Low Energy Ring (LER) at SLAC with both bare and TiN-coated aluminum chambers. In particular, we have observed… more
Date: July 3, 2008
Creator: Pivi, M. T. F.; Ng, J. S. T.; Arnett, D.; Cooper, F.; Kharakh, D.; King, F. K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quantum Phase Transitions and New Scales in QCD-Like Theories

Description: It is commonly believed that in confining vector-like gauge theories the center and chiral symmetry realizations are parametrically entangled, and if phase transitions occur, they must take place around the strong scale {Lambda}{sup -1} of the gauge theory. We demonstrate that (non-thermal) vector-like theories formulated on R{sup 3} x S{sup 1} where S{sup 1} is a spatial circle exhibit new dynamical scales and new phenomena. There are chiral phase transitions taking place at {Lambda}{sup -1}/N… more
Date: July 3, 2008
Creator: Unsal, Mithat
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

(2,2-Bipyridyl)bis(eta5-1,2,3,4,5-pentamethylcyclopentadienyl)Strontium(II)

Description: In the title compound, the Sr-N distances are 2.624 (3) and 2.676 (3) Angstroms. The Sr-centroid distances are 2.571 and 2.561 Angstroms. The N-C-C-N torsion angle in the bipyridine ligand is 2.2 (4){sup o}. Interestingly, the bipyridine ligand is tilted. The angle between the plane defined by Sr1, N1 and N2 and the plane defined by the 12 atoms of the bipyridine ligand is 10.7{sup o}.
Date: July 3, 2008
Creator: Kazhdan, Daniel; Kazhdan, Daniel; Hu, Yung-Jin; Kokai, Akos; Levi, Zerubba & Rozenel, Sergio
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

DE-FG02-06ER15364: Final Technical Report Nanoscale Reactivity of Clays, Clay Analogues (Micas), and Clay Minerals

Description: The project objectives were to determine the nanoscale to molecular scale structure of the interface between muscovite mica and aqueous solutions containing various sorbates and to explore systematics that control the incorporation of inorganic and organic chemical components during aging of nanoparticles of iron-oxides and aluminosilicate clays. The basal surface of phyllosilicates is a primary sorbent of environmental contaminants, natural organic matter, and nutrients. Micas are also superb … more
Date: July 3, 2008
Creator: Nagy, Kathryn L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated analysis for detecting beams in laser wakefield simulations

Description: Laser wakefield particle accelerators have shown the potential to generate electric fields thousands of times higher than those of conventional accelerators. The resulting extremely short particle acceleration distance could yield a potential new compact source of energetic electrons and radiation, with wide applications from medicine to physics. Physicists investigate laser-plasma internal dynamics by running particle-in-cell simulations; however, this generates a large dataset that requires t… more
Date: July 3, 2008
Creator: Ushizima, Daniela M.; Rubel, Oliver; Prabhat, Mr.; Weber, Gunther H.; Bethel, E. Wes; Aragon, Cecilia R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Lattice Design of PEP-X as a Light Source Machine at SLAC

Description: SLAC is studying an option of building a high brightness synchrotron light source machine, PEP-X, in the existing PEP-II tunnel [1]. The new machine will replace the PEPII High Energy Ring (HER) with the goal of achieving an ultra low emittance of {approx} 0.1 nm-rad at 4.5 GeV. The PEPX will utilize the same layout as in the PEP-II with 6 arcs and 6 long straight sections. The existing RF and injection systems will be re-used. The two HER FODO arcs will be replaced with the DBA arcs providing … more
Date: July 3, 2008
Creator: Wang, Min-Huey; Cai, Yunhai; Hettel, Robert & Nosochkov, Yuri
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Secondary Electron Yield Measurements and Groove Chambers Tests in the PEP-II Beam Line Straights Sections

Description: Beam instability caused by the electron cloud has been observed in positron and proton storage rings and it is expected to be a limiting factor in the performance of the positron Damping Ring (DR) of future Linear Colliders such as ILC and CLIC [1, 2]. In the Positron Low Energy Ring (LER) of the PEP-II accelerator, we have installed vacuum chambers with rectangular grooves in a straight magnetic-free section to test this promising possible electron cloud mitigation technique. We have also inst… more
Date: July 3, 2008
Creator: Pivi, M. T. F.; King, F.; Kirby, R. E.; Markiewicz, T; Raubenheimer, T. O.; Seeman, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Search for Oscillation of the Electron-Capture Decay Probability of Pm-142

Description: We have searched for time modulation of the electron capture decay probability of 142Pm in an attempt to confirm a recent claim from a group at the Gesellschaft fur Schwerionenforschung (GSI). We produced 142Pm via the 124Sn(23Na, 5n)142Pm reaction at the Berkeley 88-Inch Cyclotron with a bombardment time short compared to the reported modulation period. Isotope selection by the Berkeley Gas-filled Separator is followed by implantation and a long period of monitoring the 142Nd K alpha x-rays fr… more
Date: July 3, 2008
Creator: Vetter, Paul A; Vetter, Paul; Clark, Roderick; Dvorak, Jan; Freedman, Stuart; Gregorich, Kenneth et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Forest Carbon Markets: Potential and Drawbacks

Description: This report describes current markets for forest carbon sequestration, the potential for using forest to offset other sources of greenhouse gas emissions, and the drawbacks related to forest carbon sequestration efforts.
Date: July 3, 2008
Creator: Gorte, Ross W. & Ramseur, Jonathan L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Agricultural Disaster Assistance

Description: This report discusses the ongoing major USDA disaster programs designed to help crop producers recover from the financial effects of natural disasters — federal crop insurance, noninsured assistance program (NAP) payments, and emergency disaster loans.
Date: July 3, 2008
Creator: Chite, Ralph M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

U.S. National Science Foundation: An Overview

Description: This report provides an overview of developments and considerations regarding wave, tidal, and in-stream energy generation technology. It summarizes federal involvement in the regulation of this new industry and highlights current issues in the field.
Date: July 3, 2008
Creator: Matthews, Christine M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Forest Carbon Markets: Potential and Drawbacks

Description: This report describes current markets for forest carbon sequestration, the potential for using forest to offset other sources of greenhouse gas emissions, and the drawbacks related to forest carbon sequestration efforts.
Date: July 3, 2008
Creator: Gorte, Ross W. & Ramseur, Jonathan L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Arab League Boycott of Israel

Description: This report briefly discusses the Arab League's boycott of Israeli companies and Israeli-made goods since Israel's founding in 1948, as well as U.S. efforts to end the boycott and prevent U.S. firms in participating in the boycott.
Date: July 3, 2008
Creator: Weiss, Martin A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Emergency Alert System (EAS) and All-Hazard Warnings

Description: This report gives an overview of issues and legislation relating to the Emergency Alert System (EAS). It includes a discussion of the EAS administration, National Oceanic and Atmospheric Administration (NOAA) weather radios, all-hazard warning technology, proposals and programs, the executive order regarding the public alert and warning system and legislation from the 109th and 110th Congresses.
Date: July 3, 2008
Creator: Moore, Linda K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Brief History of Veterans' Education Benefits and Their Value

Description: This report reviews the evolution of veterans' education benefit programs and describes the types of education benefits that have been made available under these programs. The first section provides an historical overview of education benefits for military veterans, beginning with the Servicemen's Readjustment Act of 1944 (GI Bill of Rights). The second section is an analysis of the estimated value of veterans' education benefits relative to average college prices. This section focuses on the e… more
Date: July 3, 2008
Creator: Smole, David P. & Loane, Shannon S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[UNT Women's Center symbol, 2008]

Description: A logo for the UNT Women's Center. It is a symbol that represents Venus or the female sex. It is in green and looks as if it was painted.
Date: July 3, 2008
Creator: University of North Texas. Multicultural Center.
Item Type: Refine your search to only Image
Partner: UNT Libraries Special Collections
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