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2010 Census: Population Measures Are Important for Federal Funding Allocations

Description: Testimony issued by the Government Accountability Office with an abstract that begins "The decennial census is a constitutionally-mandated activity that produces critical data used to apportion congressional seats, redraw congressional districts, and allocate billions of dollars in federal assistance. This testimony discusses (1) the various measures of population used to allocate federal grant funds (2) how the accuracy of the population count and measurement of accuracy have evolved and the U… more
Date: October 29, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

A Compact Linac for Proton Therapy Based on a Dielectric Wall Accelerator

Description: A novel compact CT-guided intensity modulated proton radiotherapy (IMPT) system is described. The system is being designed to deliver fast IMPT so that larger target volumes and motion management can be accomplished. The system will be ideal for large and complex target volumes in young patients. The basis of the design is the dielectric wall accelerator (DWA) system being developed at the Lawrence Livermore National Laboratory (LLNL). The DWA uses fast switched high voltage transmission lines … more
Date: October 29, 2007
Creator: Caporaso, G. J.; Mackie, T. R.; Sampayan, S.; Chen, Y.; Wang, L.; Blackfield, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-Ray Active Matrix Pixel Sensors Basedon J-FET Technology Developed for the Linac Coherent Light Source.

Description: An X-ray Active Matrix Pixel Sensor (XAMPS) is being developed for recording data for the X-ray Pump Probe experiment at the Linac Coherent Light Source (LCLS). Special attention has to be paid to some technological challenges that this design presents. New processes were developed and refined to address problems encountered during previous productions of XAMPS. The development of these critical steps and corresponding tests results are reported here.
Date: October 29, 2007
Creator: Carini, G. A.; Chen, W.; Li, Z.; Rehak, P. & Siddons, D. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

In-situ X-ray photoelectron spectroscopy studies of water on metals and oxides at ambient conditions

Description: X-ray photoelectron spectroscopy (XPS) is a powerful tool for surface and interface analysis, providing the elemental composition of surfaces and the local chemical environment of adsorbed species. Conventional XPS experiments have been limited to ultrahigh vacuum (UHV) conditions due to a short mean free path of electrons in a gas phase. The recent advances in instrumentation coupled with third-generation synchrotron radiation sources enables in-situ XPS measurements at pressures above 5 Torr.… more
Date: October 29, 2007
Creator: Salmeron, Miquel; Yamamoto, S.; Bluhm, H.; Andersson, K.; Ketteler, G.; Ogasawara, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Neutron Capture gamma ENDF libraries for modeling and identification of neutron sources

Description: There are a number of inaccuracies and data omissions with respect to gammas from neutron capture in the ENDF libraries used as field reference information and by modeling codes used in JTOT. As the use of Active Neutron interrogation methods is expanded, these shortfalls become more acute. A new, more accurate and complete evaluated experimental database of gamma rays (over 35,000 lines for 262 isotopes up to U so far) from thermal neutron capture has recently become available from the IAEA. T… more
Date: October 29, 2007
Creator: Sleaford, B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Random Clustering on Surface Damage Density Estimates

Description: Identification and spatial registration of laser-induced damage relative to incident fluence profiles is often required to characterize the damage properties of laser optics near damage threshold. Of particular interest in inertial confinement laser systems are large aperture beam damage tests (>1cm{sup 2}) where the number of initiated damage sites for {phi}>14J/cm{sup 2} can approach 10{sup 5}-10{sup 6}, requiring automatic microscopy counting to locate and register individual damage si… more
Date: October 29, 2007
Creator: Matthews, M J & Feit, M D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Inelastic final-state interaction

Description: The final-state interaction in multichannel decay processes is systematically studied with application to B decay in mind. Since the final-state interaction is intrinsically interwoven with the decay interaction in this case, no simple phase theorem like"Watson's theorem" holds for experimentally observed final states. We first examine in detail the two-channel problem as a toy-model to clarify the issues and to remedy common mistakes made in earlier literature. Realistic multicha… more
Date: October 29, 2007
Creator: Suzuki, Mahiko & Suzuki, Mahiko
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Downstream Intensification Effects Associated with CO2 Laser Mitigation of Fused Silica

Description: Mitigation of 351nm laser-induced damage sites on fused silica exit surfaces by selective CO{sub 2} treatment has been shown to effectively arrest the exponential growth responsible for limiting the lifetime of optics in high-fluence laser systems. However, the perturbation to the optical surface profile following the mitigation process introduces phase contrast to the beam, causing some amount of downstream intensification with the potential to damage downstream optics. Control of the laser tr… more
Date: October 29, 2007
Creator: Matthews, M. J.; Bass, I. L.; Guss, G. M.; Widmayer, C. C. & Ravizza, F. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Growth of laser damage in fused silica: diameter to depth ratio

Description: Growth of laser initiated damage plays a major role in determining optics lifetime in high power laser systems. Previous measurements have established that the lateral diameter grows exponentially. Knowledge of the growth of the site in the propagation direction is also important, especially so when considering techniques designed to mitigate damage growth, where it is required to reach all the subsurface damage. In this work, we present data on both the diameter and the depth of a growing exit… more
Date: October 29, 2007
Creator: Norton, M. A.; Adams, J. J.; Carr, C. W.; Donohue, E. E.; Feit, M. D.; Hackel, R. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design for a High Energy Density Kelvin-Helmholtz Experiment

Description: While many high energy density physics (HEDP) Rayleigh-Taylor and Richtmyer-Meshkov instability experiments have been fielded as part of basic HEDP and astrophysics studies, not one HEDP Kelvin-Helmholtz (KH) experiment has been successfully performed. Herein, a design for a novel HEDP x-ray driven KH experiment is presented along with supporting radiation-hydrodynamic simulation and theory.
Date: October 29, 2007
Creator: Hurricane, O A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Wavelet Denoising of Mobile Radiation Data

Description: The investigation of wavelet analysis techniques as a means of filtering the gross-count signal obtained from radiation detectors has shown promise. These signals are contaminated with high frequency statistical noise and significantly varying background radiation levels. Wavelet transforms allow a signal to be split into its constituent frequency components without losing relative timing information. Initial simulations and an injection study have been performed. Additionally, acquisition and … more
Date: October 29, 2007
Creator: Campbell, D & Lanier, R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SRNL PARTICIPATION IN THE MULTI-SCALE ENSEMBLE EXERCISES

Description: Consequence assessment during emergency response often requires atmospheric transport and dispersion modeling to guide decision making. A statistical analysis of the ensemble of results from several models is a useful way of estimating the uncertainty for a given forecast. ENSEMBLE is a European Union program that utilizes an internet-based system to ingest transport results from numerous modeling agencies. A recent set of exercises required output on three distinct spatial and temporal scales.… more
Date: October 29, 2007
Creator: Buckley, R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Neutron Cross Sections for a Complete Set of Nd Isotopes.

Description: Neutron cross sections for a complete set of Nd isotopes, {sup 142,143,144,145,146,147,148,150}Nd, were evaluated in the incident energy range from 10{sup -5} eV to 20 MeV. In the low energy region, including thermal and resolved resonances, our evaluations are based on the latest data published in the Atlas of Neutron Resonances. In the unresolved resonance region we performed additional evaluation by using the averages of the resolved resonances and adjusting them to the experimental data. In… more
Date: October 29, 2007
Creator: Kim, H.; Herman, M.; Mughabghab, S. F.; Oblozinsky, P.; Rochman, D. & Lee, Y. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

LIGHT INDUCED TELLURIUM ENRICHMENT ON CDZNTE CRYSTALSURFACES DETECTED BY RAMAN SPECTROSCOPY

Description: Synthetic CdZnTe or 'CZT' crystals can be grown under controlled conditions to produce high quality crystals to be used as room temperature radiation detectors. Even the best crystal growth methods result in defects, such as tellurium secondary phases, that affect the crystal's performance. In this study, CZT crystals were analyzed by micro Raman spectroscopy. The growth of Te rich areas on the surface was induced by low powered lasers. The growth was observed versus time with low power Raman s… more
Date: October 29, 2007
Creator: Hawkins, S; Eliel Villa-Aleman, E; Martine Duff, M & Douglas02 Hunter, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

OPTIMIZING RADIOLOGICAL MONITOR SITING OVER THE CONTINENTAL U.S.

Description: The US Environmental Protection Agency (EPA) is installing a network of sensors in the US to monitor background radiation and elevated radiation levels expected from a possible nuclear incident. The network (RadNet) of 180 fixed sensors is intended to provide a basic estimate of the radiation level throughout the US and enhanced accuracy near population centers. This report discusses one of the objective methods for locating these monitors based on criteria outlined by the EPA. The analysis emp… more
Date: October 29, 2007
Creator: Chen, K; Robert Buckley, R; Robert Kurzeja, R; Lance Osteen, L & Saleem Salaymeh, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

[Letter from Ken Whalen to Buddy King, Ray Stafford, John Roberts and Wesley Turner, October 29, 2007]

Description: Letter from Ken Whalen to Buddy King, Ray Stafford, John Roberts and Wesley Turner on October 29, 2007 with the subject Nomination Committee. The letter begins with Whalen thanking the board of directors for accepting President Charles Moser to serve on the Board of Director's Nomination Committee. It is up to the board of directors to fill up the four available positions.
Date: October 29, 2007
Creator: Whalen, Ken
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
open access

[Letter from Ken Whalen to Charles Moser, October 29, 2007]

Description: Letter from Ken Whalen to Charles Moser, October 29, 2007 with the subject 2008 Board Elections. The letter begins with the Whalen thanking Moser to chairing the 2008 board of directors nomination committee and that the committee selected are Buddy King, John Roberts, Ray Stafford and Wesley R. Turner.
Date: October 29, 2007
Creator: Whalen, Ken
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
open access

Optical Cluster-Finding with an Adaptive Matched-Filter Technique: Algorithm and Comparison with Simulations

Description: We present a modified adaptive matched filter algorithm designed to identify clusters of galaxies in wide-field imaging surveys such as the Sloan Digital Sky Survey. The cluster-finding technique is fully adaptive to imaging surveys with spectroscopic coverage, multicolor photometric redshifts, no redshift information at all, and any combination of these within one survey. It works with high efficiency in multi-band imaging surveys where photometric redshifts can be estimated with well-understo… more
Date: October 29, 2007
Creator: Dong, Feng; Pierpaoli, Elena; Gunn, James E. & Wechsler, Risa H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SARC: Development and Support of a Sarcoma Research Consortium Infrastructure

Description: SARC is a non-for-profit organization whose mission and vision is to advocate for the collaboration on the design of clinical trials on sarcoma, to further the knowledge regarding the diagnosis and treatment of sarcoma and provide accurate and up to date information to physicians, patients and families. The objectives are to assist in the development of the infrastructure for the continued growth and spectrum of clinical research, to facilitate biannual meeting of investigators, and to develop … more
Date: October 29, 2007
Creator: Arkison, Jim
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Suzaku Observations of AGN and Synergy with GLAST

Description: In next five years, dramatic progress is anticipated for the AGN studies, as we have two important missions to observe celestial sources in the high energy regime: GLAST and Suzaku. Suzaku is the 5th Japanese X-ray astronomy satellite which was successfully launched in July 2005. It carries four X-ray sensitive imaging CCD cameras (0.2-12 keV) located in the focal planes of X-ray telescope, and a non-imaging, collimated hard X-ray detector, which extends the bandpass of the observatory to inclu… more
Date: October 29, 2007
Creator: Kataoka, Jun; Takahashi, Tad & Madejski, Greg
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Supermassive Black Hole Growth and Merger Rates from Cosmological N-body Simulations

Description: Understanding how seed black holes grow into intermediate and supermassive black holes (IMBHs and SMBHs, respectively) has important implications for the duty-cycle of active galactic nuclei (AGN), galaxy evolution, and gravitational wave astronomy. Most studies of the cosmological growth and merger history of black holes have used semianalytic models and have concentrated on SMBH growth in luminous galaxies. Using high resolution cosmological N-body simulations, we track the assembly of black … more
Date: October 29, 2007
Creator: Micic, Miroslav; Holley-Bockelmann, Kelly; Sigurdsson, Steinn & Abel, Tom
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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