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The Federal Workforce: Additional Steps Needed to Take Advantage of Federal Executive Boards' Ability to Contribute to Emergency Operations

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Office of Personnel Management (OPM), which provides direction to the federal executive boards (FEBs), is now emphasizing that in the post-9/11 environment, the boards have a transformed emergency support role. The report discusses the boards' emergency preparedness roles and responsibilities and their potential role in preparing for and responding to pandemic influenza. GAO selected 14 of the 28 FE… more
Date: May 4, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Medicare Part D: Challenges in Enrolling New Dual-Eligible Beneficiaries

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Since January 1, 2006, all dual-eligible beneficiaries--individuals with both Medicare and Medicaid coverage--must receive their drug benefit through Medicare's new Part D prescription drug plans (PDP) rather than from state Medicaid programs. GAO analyzed (1) current challenges in identifying and enrolling new dual-eligible beneficiaries in PDPs, (2) the Centers for Medicare & Medicaid Services' (CMS) … more
Date: May 4, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser heating of solid matter by light pressure-driven shocks

Description: Heating by irradiation of a solid surface in vacuum with 5 x 10{sup 20} W cm{sup -2}, 0.8 ps, 1.05 {micro}m wavelength laser light is studied by x-ray spectroscopy of the K-shell emission from thin layers of Ni, Mo and V. A surface layer is heated to {approx} 5 keV with an axial temperature gradient of 0.6 {micro}m scale length. Images of Ni Ly{sub {alpha}} show the hot region has a {approx} 25 {micro}m diameter, much smaller than {approx} 70 {micro}m region of K{sub {alpha}} emission. 2D parti… more
Date: May 4, 2007
Creator: Akli, K.; Hansen, S. B.; Kemp, A. J.; Freeman, R. R.; Beg, F. N.; Clark, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Topological Strings And (Almost) Modular Forms

Description: The B-model topological string theory on a Calabi-Yau threefold X has a symmetry group {Lambda}, generated by monodromies of the periods of X. This acts on the topological string wave function in a natural way, governed by the quantum mechanics of the phase space H{sup 3}(X). We show that, depending on the choice of polarization, the genus g topological string amplitude is either a holomorphic quasi-modular form or an almost holomorphic modular form of weight 0 under {Lambda}. Moreover, at each… more
Date: May 4, 2007
Creator: Aganagic, Mina; Bouchard, Vincent & Klemm, Albrecht
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Waveforms Measured in Confined Thermobaric Explosion

Description: Experiments with 1.5-g Shock-Dispersed-Fuel (SDF) charges have been conducted in six different chambers. Both flake Aluminum and TNT were used as the fuel. Static pressure gauges on the chamber wall were the main diagnostic. Waveforms for explosions in air were significantly larger than those in nitrogen - thereby demonstrating a strong thermobaric (combustion) effect. This effect increases as the confinement volume decreases and the mixture richness approaches 1.
Date: May 4, 2007
Creator: Reichenbach, H; Neuwald, P & Kuhl, A L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical Simulations of Thermobaric Explosions

Description: A Model of the energy evolution in thermobaric explosions is presented. It is based on the two-phase formulation: conservation laws for the gas and particle phases along with inter-phase interaction terms. It incorporates a Combustion Model based on the mass conservation laws for fuel, air and products; source/sink terms are treated in the fast-chemistry limit appropriate for such gas dynamic fields. The Model takes into account both the afterburning of the detonation products of the booster wi… more
Date: May 4, 2007
Creator: Kuhl, A L; Bell, J B; Beckner, V E & Khasainov, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quadractic Model of Thermodynamic States in SDF Explosions

Description: We study the thermodynamic states encountered during Shock-Dispersed-Fuel (SDF) explosions. Such explosions contain up to six components: three fuels (PETN, TNT and Aluminum) and their products corresponding to stoichiometric combustion with air. We establish the loci in thermodynamic state space that correctly describes the behavior of the components. Results are fit with quadratic functions that serve as fast equations of state suitable for 3D numerical simulations of SDF explosions.
Date: May 4, 2007
Creator: Kuhl, A L & Khasainov, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CDZNTE ROOM-TEMPERATURE SEMICONDUCTOR GAMMA-RAY DETECTOR FOR NATIONAL-SECURITY APPLICATIONS.

Description: One important mission of the Department of Energy's National Nuclear Security Administration is to develop reliable gamma-ray detectors to meet the widespread needs of users for effective techniques to detect and identify special nuclear- and radioactive-materials. Accordingly, the Nonproliferation and National Security Department at Brookhaven National Laboratory was tasked to evaluate existing technology and to develop improved room-temperature detectors based on semiconductors, such as CdZnT… more
Date: May 4, 2007
Creator: Camarda, G. S.; Bolotnikov, A. E.; Cui, Y.; Hossain, A.; Kohman, K. T. & James, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Directional Detection of Fission-Spectrum Neutrons.

Description: Conventional neutron detectors consisting of {sup 3}He tubes surrounded by a plastic moderator can be quite efficient in detecting fission spectrum neutrons, but do not indicate the direction of the incident radiation. We have developed a new directional detector based on double proton recoil in two separated planes of plastic scintillators. This method allows the spectrum of the neutrons to be measured by a combination of peak amplitude in the first plane and time of flight to the second plane… more
Date: May 4, 2007
Creator: Vanier, P. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The e+e- to to K+ K- \pi+\pi-, K+ K- \pi0\pi0 and K+ K- K+ K- Cross Sections Measured with Initial-State Radiation

Description: We study the processes e{sup +}e{sup -} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{gamma}, K{sup +}K{sup -}{pi}{sup 0}{pi}{sup 0}{gamma} and K{sup +}K{sup -}K{sup +}K{sup -}{gamma}, where the photon is radiated from the initial state. About 34600, 4400 and 2300 fully reconstructed events respectively, are selected from 232 fb{sup -1} of BABAR data. The invariant mass of the hadronic final state defines the effective e{sup +}e{sup -} center-of-mass energy, so that the K{sup +}K{sup -}{pi}{s… more
Date: May 4, 2007
Creator: Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J. P.; Poireau, V. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HOLDUP MEASUREMENTS FOR THREE VISUAL EXAMINATION AND TRU REMEDIATION GLOVEBOX FACILITIES AT THE SAVANNAH RIVER SITE

Description: Visual Examination (VE) gloveboxes are used to remediate transuranic waste (TRU) drums at three separate facilities at the Savannah River Site. Noncompliant items are removed before the drums undergo further characterization in preparation for shipment to the Waste Isolation Pilot Plant (WIPP). Maintaining the flow of drums through the remediation process is critical to the program's seven-days-per-week operation. Conservative assumptions are used to ensure that glovebox contamination from this… more
Date: May 4, 2007
Creator: Dewberry, R & Donald Pak, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

DHS’s Max-HR Personnel System: Regulations on Classification, Pay, and Performance Management Compared With Current Law, and Implementation Plans

Description: This report compares the final regulations with current law under Title 5 of the United States Code and relevant regulations under Title 5 of the Code of Federal Regulations. Specifically, Subparts A (General Provisions), B (Classification), C (Pay and Pay Administration), and D (Performance Management) of the final regulations are examined.
Date: May 4, 2007
Creator: Schwemle, Barbara L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Full System Model of Magnetron Sputter Chamber - Proof-of-Principle Study

Description: The lack of detailed knowledge of internal process conditions remains a key challenge in magnetron sputtering, both for chamber design and for process development. Fundamental information such as the pressure and temperature distribution of the sputter gas, and the energies and arrival angles of the sputtered atoms and other energetic species is often missing, or is only estimated from general formulas. However, open-source or low-cost tools are available for modeling most steps of the sputter … more
Date: May 4, 2007
Creator: Walton, C.; Gilmer, G.; Zepeda-Ruiz, L.; Wemhoff, A. & Barbee, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multilayers for next generation x-ray sources

Description: Multilayers are artificially layered structures that can be used to create optics and optical elements for a broad range of x-ray wavelengths, or can be optimized for other applications. The development of next generation x-ray sources (synchrotrons and x-ray free electron lasers) requires advances in x-ray optics. Newly developed multilayer-based mirrors and optical elements enabled efficient band-pass filtering, focusing and time resolved measurements in recent FLASH (Free Electron LASer in H… more
Date: May 4, 2007
Creator: Bajt, S.; Chapman, H. N.; Spiller, E.; Hau-Riege, S.; Alameda, J.; Nelson, A. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PArthENoPE: Public Algorithm Evaluating the Nucleosynthesis of Primordial Elements

Description: We describe a program for computing the abundances of light elements produced during Big Bang Nucleosynthesis which is publicly available at http://parthenope.na.infn.it/. Starting from nuclear statistical equilibrium conditions the program solves the set of coupled ordinary differential equations, follows the departure from chemical equilibrium of nuclear species, and determines their asymptotic abundances as function of several input cosmological parameters as the baryon density, the number o… more
Date: May 4, 2007
Creator: Pisanti, O.; Cirillo, A.; Esposito, S.; Iocco, F.; Mangano, G.; Miele, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analytic Models of Plausible Gravitational Lens Potentials

Description: Gravitational lenses on galaxy scales are plausibly modeled as having ellipsoidal symmetry and a universal dark matter density profile, with a Sersic profile to describe the distribution of baryonic matter. Predicting all lensing effects requires knowledge of the total lens potential: in this work we give analytic forms for that of the above hybrid model. Emphasizing that complex lens potentials can be constructed from simpler components in linear combination, we provide a recipe for attaining … more
Date: May 4, 2007
Creator: Baltz, Edward A.; Marshall, Phil & Oguri, Masamune
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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