29 Matching Results

Search Results

Results: 1 - 24 next
open access

Combating Nuclear Smuggling: DHS's Cost-Benefit Analysis to Support the Purchase of New Radiation Detection Portal Monitors Was Not Based on Available Performance Data and Did Not Fully Evaluate All the Monitors' Costs and Benefits

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Since the attacks of September 11, 2001, combating terrorism has been one of the nation's highest priorities. As part of that effort, preventing nuclear and radioactive material from being smuggled into the United States--perhaps to be used by terrorists in a nuclear weapon or in a radiological dispersal device (a "dirty bomb")--has become a key national security objective. The Department of Homeland Sec… more
Date: October 17, 2006
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Cullen Davis Fire]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 17, 2006
Duration: 1 minute 21 seconds
Creator: NBC 5 (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Cullen Davis Fire]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 17, 2006
Duration: 49 seconds
Creator: NBC 5 (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections

[Students standing outside]

Description: Image of students standing outside and wearing backpacks. The one closest to the camera is in focus and he is wearing a UNT T-Shirt. Behind him are three others, and one of them is holding a book and using her cell-phone.
Date: October 17, 2006
Creator: Wilkerson, Angilee
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
open access

A Structure at 2175 MeV in e+e- to \phif_0(980) Observed via Initial-State Radiation

Description: We study the initial-state-radiation processes e{sup +}e{sup -} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{gamma} and e{sup +}e{sup -} {yields} K{sup +}K{sup -} {pi}{sup 0}{pi}{sup 0}{gamma} using an integrated luminosity of 232 fb{sup -1} collected at the {Upsilon}(4S) mass with the BABAR detector at SLAC. Even though these reactions are dominated by intermediate states with excited kaons, we are able to study for the first time the cross section for e{sup +}e{sup -} {yields} {phi}(1020)f… more
Date: October 17, 2006
Creator: Aubert, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Estimating maximum sustainable injection pressure duringgeological sequestration of CO2 using coupled fluid flow andgeomechanical fault-slip analysis

Description: This paper demonstrates the use of coupled fluid flow andgeomechanical fault slip (fault reactivation) analysis to estimate themaximum sustainable injection pressure during geological sequestration ofCO2. Two numerical modeling approaches for analyzing faultslip areapplied, one using continuum stress-strain analysis and the other usingdiscrete fault analysis. The results of these two approaches to numericalfault-slip analyses are compared to the results of a more conventionalanalytical fault-sl… more
Date: October 17, 2006
Creator: Rutqvist, J.; Birkholzer, J.; Cappa, F. & Tsang, C.-F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Branching Fraction Measurement of B0 to D(*)-pi+and B- to D(*)0pi+ and Isospin Analyses of B to D(*)pi Decays

Description: Using 65 million {Upsilon}(4S) {yields} B{bar B} events collected with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring at the Stanford Linear Accelerator Center, they measure the color-favored branching fractions {Beta}({bar B}{sup 0} {yields} D{sup +}{pi}{sup -}) = (2.63 {+-} 0.05 {+-} 0.22) x 10{sup -3}, {Beta}({bar B}{sup 0} {yields} D*{sup +}{pi}{sup -}) = (2.79 {+-} 0.08 {+-} 0.18) x 10{sup -3}, {Beta}(B{sup -} {yields} D{sup 0}{pi}{sup -}) = (4.90 {+-} 0.07 {+-} 0.23) x 10{… more
Date: October 17, 2006
Creator: Aubert, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser-Plasma Interactions in High-Energy-Density Plasmas

Description: High temperature hohlraums (HTH) are designed to reach high radiation temperatures by coupling a maximum amount of laser energy into a small target in a short time. These 400-800 {micro}m diameter gold cylinders rapidly fill with hot plasma during irradiation with multiple beams in 1ns laser pulses. The high-Z plasmas are dense, (electron density, n{sub e}/n{sub c} {approx} 0.1-0.4), hot (electron temperature, T{sub e} {approx} 10keV) and are bathed in a high-temperature radiation field (radiat… more
Date: October 17, 2006
Creator: Baldis, H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Identification of saline soils with multi-year remote sensing of crop yields

Description: Soil salinity is an important constraint to agricultural sustainability, but accurate information on its variation across agricultural regions or its impact on regional crop productivity remains sparse. We evaluated the relationships between remotely sensed wheat yields and salinity in an irrigation district in the Colorado River Delta Region. The goals of this study were to (1) document the relative importance of salinity as a constraint to regional wheat production and (2) develop techniques … more
Date: October 17, 2006
Creator: Lobell, D; Ortiz-Monasterio, I; Gurrola, F C & Valenzuela, L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Search for the Rare Leptonic B- to tau- anti-neutrino Recoiling against B+ to Decays to anti-D*0 l+ Lepton-neutrino

Description: This thesis describes a search for the decay B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}} in 231.8 x 10{sup 6} {Upsilon}(4S) decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay (B{sup +} {yields} {bar D}*{sup 0} {ell}{sup +}{nu}{sub {ell}}) is selected, and in the recoil a search for B{sup -} {yields} {tau}{sup -} {bar {nu}}{sub {tau}} signal is performed in the following {tau} decay modes: {tau}{… more
Date: October 17, 2006
Creator: Datta, Mousumi
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Combined Climate and Carbon-Cycle Effects of Large-Scale Deforestation

Description: The prevention of deforestation and promotion of afforestation have often been cited as strategies to slow global warming. Deforestation releases CO{sub 2} to the atmosphere, which exerts a warming influence on Earth's climate. However, biophysical effects of deforestation, which include changes in land surface albedo, evapotranspiration, and cloud cover also affect climate. Here we present results from several large-scale deforestation experiments performed with a three-dimensional coupled glo… more
Date: October 17, 2006
Creator: Bala, G.; Caldeira, K.; Wickett, M.; Phillips, T. J.; Lobell, D. B.; Delire, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Public Release of a One Dimensional Version of the Photon Clean Method (PCM1D)

Description: We announce the public release of a one dimensional version of the Photon Clean Method (PCM1D). This code is in the general class of 'inverse Monte Carlo' methods and is specifically designed to interoperate with the public analysis tools available from the Chandra Science Center and the HEASARC. The tool produces models of event based data on a photon by photon basis. The instrument models are based on the standard ARF and RMF fits files. The resulting models have a high number of degrees of f… more
Date: October 17, 2006
Creator: Carpenter, M H & Jernigan, J G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experiment on mass-stripping of interstellar cloud following shock passage

Description: The interaction of supernova shocks and interstellar clouds is an important astrophysical phenomenon which can lead to mass-stripping (transfer of material from cloud to surrounding flow, ''mass-loading'' the flow) and possibly increase the compression in the cloud to high enough densities to trigger star formation. Our experiments attempt to simulate and quantify the mass-stripping as it occurs when a shock passes through interstellar clouds. We drive a strong shock using 5 kJ of the 30 kJ Ome… more
Date: October 17, 2006
Creator: Hansen, J. F.; Robey, H. F.; Klein, R. I. & Miles, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Z' Phenomenology and the LHC

Description: A brief pedagogical overview of the phenomenology of Z{prime} gauge bosons is ILC in determining Z{prime} properties is also discussed. and explore in detail how the LHC may discover and help elucidate the models, review the current constraints on the possible properties of a Z{prime} nature of these new particles. We provide an overview of the Z{prime} studies presented. Such particles can arise in various electroweak extensions of that have been performed by both ATLAS and CMS. The role of th… more
Date: October 17, 2006
Creator: Rizzo, Thomas G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Center for Catalysis at Iowa State University

Description: The overall objective of this proposal is to enable Iowa State University to establish a Center that enjoys world-class stature and eventually enhances the economy through the transfer of innovation from the laboratory to the marketplace. The funds have been used to support experimental proposals from interdisciplinary research teams in areas related to catalysis and green chemistry. Specific focus areas included: • Catalytic conversion of renewable natural resources to industrial materials • D… more
Date: October 17, 2006
Creator: Kraus, George A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Latin America: Energy Supply, Political Developments, and U.S. Policy Approaches

Description: This report examines Latin America's current political environment and its apparent effect on energy production in the region. It also examines regional integration efforts, including Venezuela's oil programs offering oil to many Latin American and Caribbean countries on a preferential basis, the Mexico-led Meso-American Energy Integration Program, and the proposed South American natural gas pipeline. The report also examines policy approaches that have been proposed for increased hemispheric e… more
Date: October 17, 2006
Creator: Sullivan, Mark P. & Ribando, Clare M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Brownfields Tax Incentive Extension

Description: The brownfields tax incentive expired on December 31, 2005. Enacted in 1997, the provision allowed a taxpayer to fully deduct the costs of environmental cleanup in the year the costs were incurred, rather than spreading the costs over a period of years. The provision was adopted to stimulate the cleanup and developers of less seriously contaminated sites by providing a benefit to taxpaying developers of brownfield properties. This report contains information on the background of brownfields, su… more
Date: October 17, 2006
Creator: Reisch, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen