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National Security: Key Challenges and Solutions to Strengthen Interagency Collaboration

Description: Testimony issued by the Government Accountability Office with an abstract that begins "Recent terrorist events such as the attempted bomb attacks in New York's Times Square and aboard an airliner on Christmas Day 2009 are reminders that national security challenges have expanded beyond the traditional threats of the Cold War Era to include unconventional threats from nonstate actors. Today's threats are diffuse and ambiguous, making it difficult--if not impossible--for any single federal agency… more
Date: June 9, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Military Readiness: Navy Needs to Reassess Its Metrics and Assumptions for Ship Crewing Requirements and Training

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Since 2000, the Navy has undertaken a number of initiatives to achieve greater efficiencies and reduce costs. For example, it has reduced crew sizes on some of its surface ships and has moved from instructor-led to more computer-based training. In House Report 111-166, which accompanied the National Defense Authorization Act for Fiscal Year 2010, the House Armed Services Committee directed GAO to review… more
Date: June 9, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Strongly Interacting Matter Matter at Very High Energy Density: 3 Lectures in Zakopane

Description: These lectures concern the properties of strongly interacting matter at very high energy density. I begin with the Color Glass Condensate and the Glasma, matter that controls the earliest times in hadronic collisions. I then describe the Quark Gluon Plasma, matter produced from the thermalized remnants of the Glasma. Finally, I describe high density baryonic matter, in particular Quarkyonic matter. The discussion will be intuitive and based on simple structural aspects of QCD. There will be som… more
Date: June 9, 2010
Creator: McLerran, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Phase Segregation in Polystyrene?Polylactide Blends

Description: Spun-cast films of polystyrene (PS) blended with polylactide (PLA) were visualized and characterized using atomic force microscopy (AFM) and synchrotron-based X-ray photoemission electron microscopy (X-PEEM). The composition of the two polymers in these systems was determined by quantitative chemical analysis of near-edge X-ray absorption signals recorded with X-PEEM. The surface morphology depends on the ratio of the two components, the total polymer concentration, and the temperature of vacuu… more
Date: June 9, 2010
Creator: Leung, Bonnie; Hitchcock, Adam; Brash, John; Scholl, Andreas & Doran, Andrew
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Verification of the Defense Waste Processing Facility Process Digestion Method for the Sludge Batch 6 Qualification Sample

Description: For each sludge batch that is processed in the Defense Waste Processing Facility (DWPF), the Savannah River National Laboratory (SRNL) confirms applicability of the digestion method to be used by the DWPF lab for elemental analysis of Sludge Receipt and Adjustment Tank (SRAT) receipt samples and SRAT product process control samples.1 DWPF SRAT samples are typically dissolved using a room temperature HF-HNO3 acid dissolution (i.e., DWPF Cold Chem (CC) Method, see DWPF Procedure SW4-15.201) and t… more
Date: June 9, 2010
Creator: Click, D.; Jones, M. & Edwards, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Implications of HARP Results for the Energy of the Proton Driver for a Neutrino Factory and Muon Collider

Description: Cross-section data from the HARP experiment for pion production by protons from a tantalum target have been convoluted with the acceptance of the front-end channel for the proposed neutrino factory or muon collider and integrated over the full phase space measured by HARP, to determine the beam-energy dependence of the muon yield. This permits a determination of the optimal beam energy for the proton driver for these projects. The cross-section data are corrected for the beam-energy dependent '… more
Date: June 9, 2010
Creator: Strait, J.; Mokhov, N. V. & Striganov, S. I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

GLOBAL MONITORING OF URANIUM HEXIFLORIDE CYLINDERS NEXT STEPS IN DEVELOPMENT OF AN ACTION PLAN

Description: Over 40 industrial facilities world-wide use standardized uranium hexafluoride (UF{sub 6}) cylinders for transport, storage and in-process receiving in support of uranium conversion, enrichment and fuel fabrication processes. UF{sub 6} is processed and stored in the cylinders, with over 50,000 tU of UF{sub 6} transported each year in these International Organization for Standardization (ISO) qualified containers. Although each cylinder is manufactured to an ISO standard that calls for a namepla… more
Date: June 9, 2010
Creator: Hanks, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

End of Enrichment Reconstruction

Description: The age and composition of special nuclear material (SNM) offers a great deal of forensic information; e.g., likely producer or country of origin. Nuclear materials (nuclides) decay at different rates, often in a chain fashion; therefore, the composition of the nuclides changes over time. Trace nuclides in special nuclear material often carry more information regarding age and original composition, but trace nuclides can be easily lost in 'approximations.' Current decay calculation technology i… more
Date: June 9, 2010
Creator: Yuan, Ding
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Data Network Equipment Energy Use and Savings Potential in Buildings

Description: Network connectivity has become nearly ubiquitous, and the energy use of the equipment required for this connectivity is growing. Network equipment consists of devices that primarily switch and route Internet Protocol (IP) packets from a source to a destination, and this category specifically excludes edge devices like PCs, servers and other sources and sinks of IP traffic. This paper presents the results of a study of network equipment energy use and includes case studies of networks in a camp… more
Date: June 9, 2010
Creator: Lanzisera, Steven; Nordman, Bruce & Brown, Richard E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Probing the evolution of antiferromagnetism in multiferroics

Description: This study delineates the evolution of magnetic order in epitaxial films of the room-temperature multiferroic BiFeO3 system. Using angle- and temperature-dependent dichroic measurements and spectromicroscopy, we have observed that the antiferromagnetic order in the model multiferroic BiFeO3 evolves systematically as a function of thickness and strain. Lattice-mismatch-induced strain is found to break the easy-plane magnetic symmetry of the bulk and leads to an easy axis of magnetization which c… more
Date: June 9, 2010
Creator: Holcomb, M.; Martin, L.; Scholl, A.; He, Q.; Yu, P.; Yang, C. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-ray Spectromicroscopy Study of Protein Adsorption to a Polystyrene-Polylactide Blend

Description: Synchrotron-based X-ray photoemission electron microscopy (X-PEEM) was used to study the adsorption of human serum albumin (HSA) to polystyrene-polylactide (40:60 PS-PLA, 0.7 wt percent) thin films, annealed under various conditions. The rugosity of the substrate varied from 35 to 90 nm, depending on the annealing conditions. However, the characteristics of the protein adsorption (amounts and phase preference) were not affected by the changes in topography. The adsorption was also not changed b… more
Date: June 9, 2010
Creator: Leung, Bonnie; Hitchcock, Adam; Cornelius, Rena; Brash, John; Scholl, Andreas & Doran, Andrew
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ambient Laboratory Coater for Advanced Gas Reactor Fuel Development

Description: this research is targeted at developing improved experimentally-based scaling relationships for the hydrodynamics of shallow, gas-spouted beds of dense particles. The work is motivated by the need to more effctively scale up shallow spouted beds used in processes such as in the coating of nuclear fuel particles where precise control of solids and gas circulation is critically important. Experimental results reported here are for a 50 mm diameter spouted bed containing two different types of b… more
Date: June 9, 2010
Creator: Bruns, Duane D.; Counce, Robert M. & Rojas, Irma D. Lima
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reactor Physics Modeling of Spent Nuclear Research Reactor Fuel for Snm Attribution and Nuclear Forensics

Description: Nuclear research reactors are the least safeguarded type of reactor; in some cases this may be attributed to low risk and in most cases it is due to difficulty from dynamic operation. Research reactors vary greatly in size, fuel type, enrichment, power and burnup providing a significant challenge to any standardized safeguard system. If a whole fuel assembly was interdicted, based on geometry and other traditional forensics work, one could identify the material's origin fairly accurately. If th… more
Date: June 9, 2010
Creator: Sternat, M.; Beals, D.; Webb, R. & Nichols, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Writable graphene: Breaking sp2 bonds with soft X-rays

Description: We study the stability of various kinds of graphene samples under soft x-ray irradiation. Our results show that in single-layer exfoliated graphene (a closer analog to two-dimensional material), the in-plane carbon-carbon bonds are unstable under x-ray irradiation, resulting in nanocrystalline structures. As the interaction along the third dimension increases by increasing the number of graphene layers or through the interaction with the substrate (epitaxial graphene), the effect of x-ray irrad… more
Date: June 9, 2010
Creator: Zhou, S.; Girit, C.; Scholl, A.; Jozwiak, C.; Siegel, D.; Yu, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nanostructured Lanthanum Halides and CeBr3 for Nuclear Radiation and Detection

Description: Scintillator materials are used to detect, and in some cases identify, gamma rays. Higher performance scintillators are expensive, hard to manufacture, fragile, and sometimes require liquid nitrogen or cooling engines. But whereas lower-quality scintillators are cheap, easy to manufacture, and more rugged, their performance is lower. At issue: can the desirable qualities of high-and low-performance scintillators be combined to achieve better performance at lower cost? Preliminary experiments sh… more
Date: June 9, 2010
Creator: Paul Guss, Sanjoy Mukhopadhyay, Ron Guise, Ding Yuan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ch. 37, Inertial Fusion Energy Technology

Description: Nuclear fission, nuclear fusion, and renewable energy (including biofuels) are the only energy sources capable of satisfying the Earth's need for power for the next century and beyond without the negative environmental impacts of fossil fuels. Substantially increasing the use of nuclear fission and renewable energy now could help reduce dependency on fossil fuels, but nuclear fusion has the potential of becoming the ultimate base-load energy source. Fusion is an attractive fuel source because i… more
Date: June 9, 2010
Creator: Moses, E.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Stripe-to-bubble transition of magnetic domains at the spin reorientation of (Fe/Ni)/Cu/Ni/Cu(001)

Description: Magnetic domain evolution at the spin reorientation transition (SRT) of (Fe/Ni)/Cu/Ni/Cu(001) is investigated using photoemission electron microscopy. While the (Fe/Ni) layer exhibits the SRT, the interlayer coupling of the perpendicularly magnetized Ni layer to the (Fe/Ni) layer serves as a virtual perpendicular magnetic field exerted on the (Fe/Ni) layer. We find that the perpendicular virtual magnetic field breaks the up-down symmetry of the (Fe/Ni) stripe domains to induce a net magnetizati… more
Date: June 9, 2010
Creator: Wu, J.; Choi, J.; Won, C.; Wu, Y. Z.; Scholl, A.; Doran, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Federal Register, Volume 75, Number 110, June 9, 2010, Pages 32649-32840

Description: Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date: June 9, 2010
Creator: United States. Office of the Federal Register.
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Libraries Government Documents Department
open access

Spectrum Policy in the Age of Broadband: Issues for Congress

Description: This report discusses spectrum policy issues in the 111th Congress. In formulating spectrum policy, mainstream viewpoints generally diverge on whether to give priority to market economics or social goals. Among the spectrum policy initiatives that have been proposed in Congress in recent years are: allocating more spectrum for unlicensed use; auctioning airwaves currently allocated for federal use; and devising new fees on spectrum use, notably those collected by the FCC's statutory authority t… more
Date: June 9, 2010
Creator: Moore, Linda K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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