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VA Faces Challenges in Providing Substance Use Disorder Services and Is Taking Steps to Improve These Services for Veterans

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Substance use disorders (SUD), such as alcohol abuse and drug addiction, are serious health conditions that affect many Americans, including a substantial number of veterans. According to the Department of Veterans Affairs (VA), about 420,000 of the over 5 million veterans receiving health care from VA had SUD diagnoses in fiscal year 2009. Both older veterans and veterans of the current military operati… more
Date: March 10, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Defense Acquisitions: Opportunities for the Army to Position Its Ground Force Modernization Efforts for Success

Description: Testimony issued by the Government Accountability Office with an abstract that begins "Since 2003, the Future Combat System (FCS) program has been the centerpiece of the Army's efforts to transition to a lighter, more agile, and more capable combat force. In 2009, however, concerns over the program's performance led to the Secretary of Defense's decision to significantly restructure and ultimately cancel the acquisition program. As a result, the Army is outlining a new approach to ground force … more
Date: March 10, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Space Acquisitions: DOD Poised to Enhance Space Capabilities, but Persistent Challenges Remain in Developing Space Systems

Description: Testimony issued by the Government Accountability Office with an abstract that begins "The majority of large-scale acquisition programs in the Department of Defense's (DOD) space portfolio have experienced problems during the past two decades that have driven up costs by billions of dollars, stretched schedules by years, and increased technical risks. To address the cost increases, DOD altered its acquisitions by reducing the number of satellites it intended to buy, reducing the capabilities of… more
Date: March 10, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Dynamics of Electroencephalogram Entropy and Pitfalls of Scaling Detection

Description: This article discusses dynamics of electroencephalogram entropy and pitfalls of scaling detection. Herein the authors study the time evolution of diffusion entropy to elucidate the scaling of EGG time series.
Date: March 10, 2010
Creator: Ignaccolo, Massimiliano; Latka, Miroslaw; Jernajczyk, Wojciech; Grigolini, Paolo & West, Bruce J.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

SOLUBILITY OF URANIUM AND PLUTONIUM IN ALKALINE SAVANNAH RIVER SITE HIGH LEVEL WASTE SOLUTIONS

Description: Five actual Savannah River Site tank waste samples and three chemically-modified samples were tested to determine solubility limits for uranium and plutonium over a one year time period. Observed final uranium concentrations ranged from 7 mg U/L to 4.5 g U/L. Final plutonium concentrations ranged from 4 {micro}g Pu/L to 12 mg Pu/L. Actinide carbonate complexation is believed to result in the dramatic solubility increases observed for one sample over long time periods. Clarkeite, NaUO{sub 2}(O)O… more
Date: March 10, 2010
Creator: King, W.; Hobbs, D.; Wilmarth, B. & Edwards, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advances in Modeling Exploding Bridgewire Initiation

Description: There is great interest in applying magnetohydrodynamic (MHD) simulation techniques to the designs of electrical high explosive (HE) initiators, for the purpose of better understanding a design's sensitivities, optimizing its performance, and/or predicting its useful lifetime. Two MHD-capable LLNL codes, CALE and ALE3D, are being used to simulate the process of ohmic heating, vaporization, and plasma formation in exploding bridgewires (EBW). Initiation of the HE is simulated using Ignition & Gr… more
Date: March 10, 2010
Creator: Hrousis, C A & Christensen, J S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reactive Flow Modeling of Liquid Explosives via ALE3D/Cheetah Simulations

Description: We carried out reactive flow simulations of liquid explosives such as nitromethane using the hydrodynamic code ALE3D coupled with equations of state and reaction kinetics modeled by the thermochemical code Cheetah. The simulation set-up was chosen to mimic cylinder experiments. For pure unconfined nitromethane we find that the failure diameter and detonation velocity dependence on charge diameter are in agreement with available experimental results. Such simulations are likely to be useful for … more
Date: March 10, 2010
Creator: Kuo, I W; Bastea, S & Fried, L E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MEASUREMENT OF MATERIAL PROPERTIES OF DAMAGED ENERGETIC MATERIALS

Description: We recently conducted damaged experiments on three explosives (mechanical damage on LX-04 and thermal experiments on HPP and PBXN-9) and characterized the effect of damage on some material properties. The MTS equipment was used to apply compressive cycling to LX-04 pressed parts and the results showed that older LX-04 parts became mechanically weaker than newer parts. After repeated compressive cycling for over 20,000 times, older LX-04 parts failed but newer LX-04 parts survived. Thermal insul… more
Date: March 10, 2010
Creator: Hsu, P C; Hust, G; Dehaven, M; Chidester, S; Glascoe, L; Hoffman, M et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Axions from cosmic string and wall decay

Description: If inflation occurred with a reheat temperature > T{sub PQ}, axions from the decay of global axion strings and domain walls would make an important contribution to the cosmological energy density, comparable to that from vacuum misalignment. Several groups have numerically studied the evolution of axion strings and walls in the past, however substantial uncertainties remain in their contribution to the present density {Omega}{sub a,string+wall} {approx} 1-100 (f{sub a}/10{sup 12} GeV){sup 7/… more
Date: March 10, 2010
Creator: Hagmann, C A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Wavelength measurement of n = 3 - n' = 3 transitions in highly charged tungsten ions

Description: 3s{sub 1/2} - 3p{sub 3/2} and 3p{sub 1/2} - 3d{sub 3/2} transitions have been studied in potassium-like W{sup 55+} through neon-like W{sup 64}+ ions at the electron-beam ion trap facility in Livermore. The wavelengths of the lines have been measured in high resolution relative to well known reference lines from oxygen and nitrogen ions. Using the high-energy SuperEBIT electron-beam ion trap and an R = 44.3 m grazing-incidence soft x-ray spectrometer, the lines were observed with a cryogenic cha… more
Date: March 10, 2010
Creator: Clementson, J & Beiersdorfer, P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The compressibility of cubic white and orthorhombic, rhombohedral, and simple cubic black phosphorus

Description: The effect of pressure on the crystal structure of white phosphorus has been studied up to 22.4 GPa. The ?alpha phase was found to transform into the alpha' phase at 0.87 +- 0.04 GPa with a volume change of 0.1 +- 0.3 cc/mol. A fit of a second order Birch- Murnaghan equation to the data gave Vo = 16.94 ? 0.08 cc/mol and Ko = 6.7 +- 0.5 GPa for the alpha phase and Vo = 16.4 +- 0.1 cc/mol and Ko = 9.1 +- 0.3 GPa for the alpha' phase. The alpha' phase was found to transform to the A17 phase of … more
Date: March 10, 2010
Creator: Clark, Simon M & Zaug, Joseph
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Prospective Type Ia supernova surveys from Dome A

Description: Dome A, the highest plateau in Antarctica, is being developed as a site for an astronomical observatory. The planned telescopes and instrumentation and the unique site characteristics are conducive toward Type Ia supernova surveys for cosmology. A self-contained search and survey over 5 years can yield a spectro-photometric time series of ~;; 1000 z< 0:08 supernovae. These can serve to anchor the Hubble diagram and quantify the relationship between luminosities and heterogeneities within the… more
Date: March 10, 2010
Creator: Kim, A.; Bonissent, A.; Christiansen, J. L.; Ealet, A.; Faccioli, L.; Gladney, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Efficient Bulk Data Replication for the Earth System Grid

Description: The Earth System Grid (ESG) community faces the difficult challenge of managing the distribution of massive data sets to thousands of scientists around the world. To move data replicas efficiently, the ESG has developed a data transfer management tool called the Bulk Data Mover (BDM). We describe the performance results of the current system and plans towards extending the techniques developed so far for the up- coming project, in which the ESG will employ advanced networks to move multi-TB dat… more
Date: March 10, 2010
Creator: Sim, Alex; Gunter, Dan; Natarajan, Vijaya; Shoshani, Arie; Williams, Dean; Long, Jeff et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A direct measurement of rotatable and frozen CoO spins in exchange bias system of CoO/Fe/Ag(001)

Description: The exchange bias of epitaxially grown CoO/Fe/Ag(001) was investigated using x-ray magnetic circular dichroism and x-ray magnetic linear dichroism (XMLD) techniques. A direct XMLD measurement on the CoO layer during the Fe magnetization reversal shows that the CoO compensated spins are rotatable at thinner thickness and frozen at larger thickness. By a quantitative determination of the rotatable and frozen CoO spins as a function of the CoO film thickness, we find the remarkable result that the… more
Date: March 10, 2010
Creator: Wu, J.; Park, J. S.; Kim, W.; Arenholz, E.; Liberati, M.; Scholl, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Federal Research and Development Funding: FY2011

Description: This report summarizes the FY2011 budget request for research & development (R&D) funding, including comparisons to R&D funding requests in the FY2010 budget. Congress will play a central role in defining the nation's R&D priorities, especially with respect to two overarching issues: the extent to which the Federal R&D investment can grow in the context of increased pressure on discretionary spending and how available funding will be prioritized and allocated. This report breaks down in detail … more
Date: March 10, 2010
Creator: Sargent, John F., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gun Control Legislation

Description: This report provides basic firearms-related statistics, an overview of federal firearms law, and a summary of legislative action in the 111th Congress. The report concludes with salient issues that have generated significant congressional interest, including the 1994-2004 LCAFD ban.
Date: March 10, 2010
Creator: Krouse, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Unique Treatment of GMAC Under the TARP

Description: March report of the U.S. Congressional Oversight Panel describing their activities and findings regarding the state of the General Motors Acceptance Corporation during the 2007-2008 financial crisis and the financial assistance received by the firm by the federal government.
Date: March 10, 2010
Creator: United States. Congressional Oversight Panel.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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