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13C-Tracer Experiments in DIII-D Preliminary to Thermal Oxidation Experiments to Understand Tritium Recovery in DIII-D, JET, C-Mod, and MAST (open access)

13C-Tracer Experiments in DIII-D Preliminary to Thermal Oxidation Experiments to Understand Tritium Recovery in DIII-D, JET, C-Mod, and MAST

Retention of tritium in carbon co-deposits is a serious concern for ITER. Developing a reliable in-situ removal method of the co-deposited tritium would allow the use of carbon plasma-facing components which have proven reliable in high heat flux conditions and compatible with high performance plasmas. Thermal oxidation is a potential solution, capable of reaching even hidden locations. It is necessary to establish the least severe conditions to achieve adequate tritium recovery, minimizing damage and reconditioning time. The first step in this multi-machine project is {sup 13}C-tracer experiments in DIII-D, JET, C-Mod and MAST. In DIII-D and JET, {sup 13}CH{sub 4} has been (and in C-Mod and MAST, will be) injected toroidally symmetrically, facilitating quantification and interpretation of the results. Tiles have been removed, analyzed for {sup 13}C content and will next be evaluated in a thermal oxidation test facility in Toronto with regard to the ability of different severities of oxidation exposure to remove the different types of (known and measured) {sup 13}C co-deposit. Removal of D/T from B on Mo tiles from C-Mod will also be tested. OEDGE interpretive code analysis of the {sup 13}C deposition patterns is used to generate the understanding needed to apply findings to ITER. …
Date: June 19, 2006
Creator: Stangeby, P.; Allen, S.; Bekris, N.; Brooks, N.; Christie, K.; Chrobak, C. et al.
Object Type: Article
System: The UNT Digital Library
Actinic Inspection of EUV Programmed Multilayer Defects and Cross-Comparison Measurements (open access)

Actinic Inspection of EUV Programmed Multilayer Defects and Cross-Comparison Measurements

The production of defect-free mask blanks remains a key challenge for extreme ultraviolet (EUV) lithography. Integral to this effort is the development and characterization of mask inspection tools that are sensitive enough to detect critical defects with high confidence. Using a single programmed-defect mask with a range of buried bump-type defects, we report a comparison of measurements made in four different mask-inspection tools: one commercial tool using 488-nm wavelength illumination, one prototype tool that uses 266-nm illumination, and two non-commercial EUV ''actinic'' inspection tools. The EUV tools include a darkfield imaging microscope and a scanning microscope. Our measurements show improving sensitivity with the shorter wavelength non-EUV tool, down to 33-nm spherical-equivalent-volume diameter, for defects of this type. Measurements conditions were unique to each tool, with the EUV tools operating at a much slower inspection rate. Several defects observed with EUV inspection were below the detection threshold of the non-EUV tools.
Date: June 19, 2006
Creator: Goldberg, K.; Barty, A.; Liu, Y.; Kearney, P.; Tezuka, Y.; Terasawa, T. et al.
Object Type: Article
System: The UNT Digital Library
Africa: U.S. Foreign Assistance Issues (open access)

Africa: U.S. Foreign Assistance Issues

Under the Administration's FY2006 foreign assistance request, U.S. aid to sub-Saharan Africa would continue to grow, due to sharp increases through the State Department's Global HIV/AIDS Initiative. Overall, non-food aid to Africa would total about $3.6 billion under the requst, compared with an estimated $3.4 billion being allocated in FY2005. U.S. assistance finds its way to Africa through a variety of channels, including the USAID-administered DA and Child Survival programs, food aid programs, and refugee assistance. The overall level of funding for aid to Africa remains a continuing subject of debate. Other issues include the eligibility of African countries for aid through the Millennium Challenge Account and U.S. support for the New Partnership for Africa's Development (NEPAD), an African initiative linking increased aid with policy reform.
Date: June 19, 2006
Creator: Dagne, Ted
Object Type: Report
System: The UNT Digital Library
Africa: U.S. Foreign Assistance Issues (open access)

Africa: U.S. Foreign Assistance Issues

This report discusses the issue of U.S. economic assistance to sub-Saharan Africa, highlighting the importance of continued assistance in light of U.S. national security and also various U.S.-led efforts to promote reform amongst African citizens themselves. U.S. assistance finds its way to Africa through a variety of channels, including the USAID-administered DA program, food aid programs, and indirect aid provided through international financial institutions and the United Nations.
Date: June 19, 2006
Creator: Dagne, Ted
Object Type: Report
System: The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 107, No. 374, Ed. 1 Monday, June 19, 2006 (open access)

Altus Times (Altus, Okla.), Vol. 107, No. 374, Ed. 1 Monday, June 19, 2006

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: June 19, 2006
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 85, No. 220, Ed. 1 Monday, June 19, 2006 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 85, No. 220, Ed. 1 Monday, June 19, 2006

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: June 19, 2006
Creator: Cash, Wanda Garner
Object Type: Newspaper
System: The Portal to Texas History
Biased Cosmology: Pivots, Parameters, and Figures of Merit (open access)

Biased Cosmology: Pivots, Parameters, and Figures of Merit

In the quest for precision cosmology, one must ensure that the cosmology is accurate as well. We discuss figures of merit for determining from observations whether the dark energy is a cosmological constant or dynamical, with special attention to the best determined equation of state value, at the ``pivot'' or decorrelation redshift. We show this is not necessarily the best lever on testing consistency with the cosmological constant, and moreover is subject to bias. The standard parametrization of w(a)=w_0+w_a(1-a) by contrast is quite robust, as tested by extensions to higher order parametrizations and modified gravity. Combination of complementary probes gives strong immunization against inaccurate, but precise, cosmology.
Date: June 19, 2006
Creator: Linder, Eric V.
Object Type: Article
System: The UNT Digital Library
Cable Franchising Provisions in House-Passed H.R. 5252, 109th Congress (open access)

Cable Franchising Provisions in House-Passed H.R. 5252, 109th Congress

This report consists of cable franchising provisions in house-passed H.R. 5252, 109th Congress.
Date: June 19, 2006
Creator: Goldfarb, Charles B.
Object Type: Report
System: The UNT Digital Library
Capella Corona Revisited: a Combined View from Textit XMM-Newton RGS, Textit Chandra HETGS, and LETGS (open access)

Capella Corona Revisited: a Combined View from Textit XMM-Newton RGS, Textit Chandra HETGS, and LETGS

We present a combined analysis of the X-ray emission of the Capella corona obtained with XMM-Newton RGS, Chandra HETGS, and LETGS. An improved atomic line database and a new differential emission measure (DEM) deconvolution method are developed for this purpose. Our new atomic database is based on the Astrophysical Plasma Emission Database and incorporates improved calculations of ionization equilibrium and line emissivities for L-shell ions of abundant elements using the Flexible Atomic Code. The new DEM deconvolution method uses a Markov Chain Monte-Carlo (MCMC) technique which differs from existing MCMC or {chi}{sup 2}-fitting based methods. We analyze the advantages and disadvantages of each individual instrument in determining the DEM and elemental abundances. We conclude that results from either RGS or HETGS data alone are not robust enough due to their failure to constrain DEM in some temperature region or the lack of significant continuum emission in the wavelength band of the spectrometers, and that the combination of HETGS and RGS gives more stringent constraints on the DEM and abundance determinations. Using the LETGS data, we show that the recently discovered inconsistencies between the EUV and X-ray lines of Fe XVIII and XIX also exist in more highly charged iron ions, …
Date: June 19, 2006
Creator: Gu, Ming Feng; Gupta, R.; Peterson, J.R.; Sako, M.; Kahn, S.M. & /Stanford U., Phys. Dept. /KIPAC, Menlo Park
Object Type: Article
System: The UNT Digital Library
Combustion of Shock-Dispersed Flake Aluminum - High-Speed Visualization (open access)

Combustion of Shock-Dispersed Flake Aluminum - High-Speed Visualization

Charges of 0.5 g PETN were used to disperse 1 g of flake aluminum in a rectangular test chamber of 4 liter inner volume and inner dimensions of approximately 10 cm x 10 cm x 40 cm. The subsequent combustion of the flake aluminum with the ambient air in the chamber gave rise to a highly luminous flame. The evolution of the luminous region was studied by means of high-speed cinematography. The high-speed camera is responsive to a broad spectral range in the visible and near infra-red. For a number of tests this response range was narrowed down by means of a band-pass filter with a center wavelength of 488 nm and a half-width of 23 nm. The corresponding images were expected to have a stronger temperature dependence than images obtained without the filter, thus providing better capability to highlight hot-spots. Emission in the range of the pass-band of the filter can be due to continuous thermal radiation from hot Al and Al{sub 2}O{sub 3} particles or to molecular band emission from gaseous AlO. A time-resolving spectrometer was improvised to inspect this topic. The results suggest that AlO emission occurs, but that the continuous spectrum is the dominating effect in …
Date: June 19, 2006
Creator: Neuwald, P; Reichenbach, H & Kuhl, A
Object Type: Article
System: The UNT Digital Library
[Dallas National Bank Check] (open access)

[Dallas National Bank Check]

Dallas National Bank check of $15.00 from Samuel Wenning.
Date: June 19, 2006
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Dam Removal: Issues, Considerations, and Controversies (open access)

Dam Removal: Issues, Considerations, and Controversies

This report provides an overview of the issues, considerations, and controversies on dam removal. Considerations up to the dam removal, and issues related to dam removal itself, are the focus of this report.
Date: June 19, 2006
Creator: Lane, Nic
Object Type: Report
System: The UNT Digital Library
Defense Management: Attention Is Needed to Improve Oversight of DLA Prime Vendor Program (open access)

Defense Management: Attention Is Needed to Improve Oversight of DLA Prime Vendor Program

Correspondence issued by the Government Accountability Office with an abstract that begins "In fiscal year 2005, prime vendor sales accounted for approximately $9 billion of the Defense Logistics Agency's (DLA) total sales and service of $32 billion. Under the prime vendor concept, the Department of Defense (DOD) relies on a distributor of a commercial product line, who provides that product line and incidental services to customers in an assigned region or area of responsibility. Products or services are to be delivered within a specified period of time after order placement. Since 1991, we have identified the use of prime vendors as a best commercial practice for inventory management. Nonetheless, media reports in October 2005, and a hearing before the House Armed Services Committee on November 9, 2005, raised concerns about the use of the prime vendor concept and the prices that DLA was paying for items acquired through a prime vendor. The use of prime vendor contracts is governed by the Federal Acquisition Regulation (FAR) and the Defense Federal Acquisition Regulation Supplement. DLA manages the program and the Director of DLA reports to the Under Secretary of Defense for Acquisition, Technology and Logistics through the Deputy Under Secretary of Defense …
Date: June 19, 2006
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
DIII-D Studies of Massive Gas Injection Fast Shutdowns for Disruption Mitigation (open access)

DIII-D Studies of Massive Gas Injection Fast Shutdowns for Disruption Mitigation

Injection of massive quantities of gas is a promising technique for fast shutdown of ITER for the purpose of avoiding divertor and first wall damage from disruptions. Previous experiments using massive gas injection (MGI) to terminate discharges in the DIII-D tokamak have demonstrated rapid shutdown with reduced wall heating and halo currents (relative to natural disruptions) and with very small runaway electron (RE) generation [1]. Figure 1 shows time traces which give an overview of shutdown time scales. Typically, of order 5 x 10{sup 22} Ar neutrals are fired over a pulse of 25 ms duration into stationary (non-disrupting) discharges. The observed results are consistent with the following scenario: within several ms of the jet trigger, sufficient Ar neutrals are delivered to the plasma to cause the edge temperature to collapse, initiating the inward propagation of a cold front. The exit flow of the jet [Fig. 1(a)] has a {approx} 9 ms rise time; so the quantity of neutrals which initiates the edge collapse is small (<10{sup 20}). When the cold front reaches q {approx} 2 surface, global magnetohydrodynamic (MHD) modes are destabilized [2], mixing hot core plasma with edge impurities. Here, q is the safety factor. Most (>90%) of …
Date: June 19, 2006
Creator: Hollmann, E.; Jernigan, T.; Antar, G.; Bakhtiari, M.; Boedo, J.; Combs, S. et al.
Object Type: Article
System: The UNT Digital Library
[Email from Betty J. Brown, June 19, 2006] (open access)

[Email from Betty J. Brown, June 19, 2006]

Email from Betty J. Brown to Caro Bosca, Sherry Ringler, and Nell Bright discussing Catherine Murphy's lack of response to the plan to hire an executive director.
Date: June 19, 2006
Creator: Brown, Betty J.
Object Type: Letter
System: The Portal to Texas History
[Email from Betty Jane Williams, June 19, 2006] (open access)

[Email from Betty Jane Williams, June 19, 2006]

Email from Betty Jane Williams to members of the WASP's Board of Directors and By-Laws Committee discussing proposed changes to the organization's by-laws and presenting the By-Laws Committee's recommendations.
Date: June 19, 2006
Creator: Williams, Betty Jane
Object Type: Letter
System: The Portal to Texas History
Environmental Protection Department Operations and Regulatory Affairs Division LLNL NESHAPs 2005 Annual Report (open access)

Environmental Protection Department Operations and Regulatory Affairs Division LLNL NESHAPs 2005 Annual Report

This annual report is prepared pursuant to the National Emission Standards for Hazardous Air Pollutants (NESHAPs; Title 40 Code of Federal Regulations [CFR] Part 61, Subpart H). Subpart H governs radionuclide emissions to air from Department of Energy (DOE) facilities. NESHAPs limits the emission of radionuclides to the ambient air from DOE facilities to levels resulting in an annual effective dose equivalent (EDE) of 10 mrem (100 {micro}Sv) to any member of the public. The EDEs for the Lawrence Livermore National Laboratory (LLNL) site-wide maximally exposed members of the public from operations in 2005 are summarized here. Livermore site: 0.0065 mrem (0.065 {micro}Sv) (41% from point source emissions, 59% from diffuse source emissions). The point source emissions include gaseous tritium modeled as tritiated water vapor as directed by EPA Region IX; the resulting dose is used for compliance purposes. Site 300: 0.018 mrem (0.18 {micro}Sv) (48% from point source emissions, 52% from diffuse source emissions). The EDEs were calculated using the EPA-approved CAP88-PC air dispersion/dose-assessment model, except for doses for two diffuse sources that were estimated using measured radionuclide concentrations and dose coefficients. Specific inputs to CAP88-PC for the modeled sources included site-specific meteorological data and source emissions data, the …
Date: June 19, 2006
Creator: Larson, J.; Peterson, S. R.; Wilson, K.; Bowen, B.; MacQueen, D. & Wegrecki, A.
Object Type: Report
System: The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, June 19, 2006 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Monday, June 19, 2006

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: June 19, 2006
Creator: Bush, Kent
Object Type: Newspaper
System: The Gateway to Oklahoma History
Faith-Based and Community Initiative: Improvements in Monitoring Grantees and Measuring Performance Could Enhance Accountability (open access)

Faith-Based and Community Initiative: Improvements in Monitoring Grantees and Measuring Performance Could Enhance Accountability

A letter report issued by the Government Accountability Office with an abstract that begins "The Administration's efforts to improve the federal government's provision of social services through its Faith-Based and Community Initiative have sparked considerable interest. GAO was asked to examine (1) the activities of the initiative-related centers in five federal agencies; (2) the grant award procedures for selected grants; (3) the extent to which selected federal and state agencies are providing information on and ensuring compliance with safeguards designed to protect faith-based organizations (FBO), beneficiaries, and the government; and (4) how the progress of the initiative is being measured. We interviewed government officials administering 10 grant programs and officials from 26 FBOs."
Date: June 19, 2006
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Final Technical Report ARM DOE Grant #DE-FG02-03ER63520 Parameterizations of Shortwave Radiactive Properties of Broken Clouds from Satellite and Ground-Based Measurements (open access)

Final Technical Report ARM DOE Grant #DE-FG02-03ER63520 Parameterizations of Shortwave Radiactive Properties of Broken Clouds from Satellite and Ground-Based Measurements

This study used DOE ARM data and facilities to: 1) study macroscopic properties of continental stratus clouds at SGP and the factors controlling these properties, 2) develop a scientific basis for understanding the pocesses responsible for the formation of boundary layer clouds using ARM observations in conjunction with simple parametric models and LES, and 3) evaluate cumulus cloud characteristics retrieved retrieved from the MMCR operating at TWP-Nauru. In addition we have used high resolution 94 GHz observations of boundary layer clouds and precipitation to: 1)develop techniques for using high temporal resolution Doppler velocities to study large-eddy circulations and turbulence in boundary layer clouds and estimate the limitations of using current and past MMCR data for boundary layer cloud studies, 2) evaluate the capability and limitation of the current MMCR data for estimating reflectivity, vertical velocities, and spectral under low-signal-to-noise conditions associated with weak non-precipitating clouds, 3) develop possible sampling modes for the new MMCR processors to allow for adequate sampling of boundary layer clouds, and 4) retrieve updraft and downdraft structures under precipitating conditions.
Date: June 19, 2006
Creator: Albrecht, Bruce, A.
Object Type: Report
System: The UNT Digital Library
First Wall and Operational Diagnostics (open access)

First Wall and Operational Diagnostics

In this chapter we review numerous diagnostics capable of measurements at or near the first wall, many of which contribute information useful for safe operation of a tokamak. There are sections discussing infrared cameras, visible and VUV cameras, pressure gauges and RGAs, Langmuir probes, thermocouples, and erosion and deposition measurements by insertable probes and quartz microbalance. Also discussed are dust measurements by electrostatic detectors, laser scattering, visible and IR cameras, and manual collection of samples after machine opening. In each case the diagnostic is discussed with a view toward application to a burning plasma machine such as ITER.
Date: June 19, 2006
Creator: Lasnier, C.; Allen, S.; Boedo, J.; Groth, M.; Brooks, N.; McLean, A. et al.
Object Type: Article
System: The UNT Digital Library
Geochemistry of Natural Components in the Near-Field Environment, Yucca Mountain, Nevada (open access)

Geochemistry of Natural Components in the Near-Field Environment, Yucca Mountain, Nevada

The natural near-field environment in and around the emplacement drifts of the proposed nuclear waste repository at Yucca Mountain, Nevada, includes the host rock, dust, seepage water, and pore water. The chemical compositions of these components have been analyzed to provide a basis for assessing possible chemical and mineralogical reactions that may occur in and around the emplacement drifts during the heating and cooling cycle. The crystal-poor rhyolite of the Topopah Spring Tuff of Miocene age with an average silica (SiO{sub 2}) content of 76 percent will host the proposed repository. Samples of the rhyolite are relatively uniform in chemical composition as shown by an average coefficient of variation (CV) of 8.6 percent for major elements. The major component of underground dust is comminuted tuff generated during construction of the tunnel. Average CVs for major elements of dust samples collected from the main tunnel (Exploratory Studies Facility, ESF) and a cross drift (Enhanced Characterization of the Repository Block, ECRB) are 25 and 28 percent, respectively. This increased variability is due to a variable amount of dust derived from trachyte with SiO{sub 2} contents as low as 66 percent (from overlying crystal-rich members) and from surface dust with an even lower …
Date: June 19, 2006
Creator: Peterman, Z. E. & Oliver, T. A.
Object Type: Report
System: The UNT Digital Library
[Golden Keys for lanyards] (open access)

[Golden Keys for lanyards]

A check statement of $2,737.10 to Golden Keys for lanyards on June 19, 2006. A handwritten note about lanyards for credential badges and Golden Key contact information.
Date: June 19, 2006
Creator: unknown
Object Type: Text
System: The UNT Digital Library
High Efficiency, Ultra-Low Emission, Integrated Process Heater System (open access)

High Efficiency, Ultra-Low Emission, Integrated Process Heater System

The team of TIAX LLC, ExxonMobil Research and Engineering Company, and Callidus Technologies, LLC conducted a six-year program to develop an ultra-low emission process heater burner and an advanced high efficiency heater design. This project addresses the critical need of process heater operators for reliable, economical emission reduction technologies to comply with stringent emission regulations, and for heater design alternatives that reduce process heater energy requirements without significant cost increase. The key project targets were NOx emissions of 10 ppm (@ 3% O2), and a heater thermal efficiency of 95 percent. The ultra low NOx burner was developed through a series of pilot-scale and field tests combined with computational fluid dynamic modeling to arrive at simultaneous low emissions and suitable flame shape and stability. Pilot scale tests were run at TIAX, at the 2 MMBtu/hr scale, and at Callidus at 8 MMBtu/hr. The full scale burner was installed on a 14 burner atmospheric pipestill furnace at an ExxonMobil refinery. A variety of burner configurations, gas tips and flame stabilizers were tested to determine the lowest emissions with acceptable flame shape and stability. The resulting NOx emissions were 22 ppm on average. Starting in 2001, Callidus commercialized the original ultra low …
Date: June 19, 2006
Creator: Mason, Howard; Boral, Anindya; Chhotray, San & Martin, Matthew
Object Type: Report
System: The UNT Digital Library