Search Results

open access

Acquisition of Leased Space for the U.S. Patent and Trademark Office

Description: Correspondence issued by the General Accounting Office with an abstract that begins "This report reviews the data, assumptions, and conclusions reached by the General Services Administration (GSA) and the Patent and Trademark Office (PTO) on the acquisition of about two million square feet of leased space for the consolidation of PTO activities. This build-to-suit lease, valued at approximately $1.2 billion over its 20-year term, was signed in June 2000. this report responds to allegations and … more
Date: June 5, 2001
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
open access

Customs Service Modernization: Results of Review of First Automated Commercial Environment Expenditure Plan

Description: A letter report issued by the General Accounting Office with an abstract that begins "This report discusses the U.S. Custom Service's expenditure plan for its Automated Commercial Environment System (ACE). GAO found that (1) Customs' expenditure plan satisfies the legislative conditions specified in the 2001 Consolidated Appropriations Act, (2) activities described in the plan are consistent with GAO's two open recommendations regarding the need for Customs to justify and make ACE investment de… more
Date: June 5, 2001
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
open access

NIF Power Conditioning System Testing at LLNL

Description: The National Ignition Facility (NIF) is now under construction at the Lawrence Livermore National Laboratory (LLNL). The Power Conditioning System (PCS) for NIF, when completed will consist of a 192 nearly identical 2 megajoule capacitor storage banks driving 7680 two meter long flashlamps. A fully integrated single-module test facility was completed in August of 2000 at LLNL. The purpose to the Test Facility is to conduct Reliability and Maintainability (RAM) testing of a true ''First Article'… more
Date: June 5, 2001
Creator: Fulkerson, E S; Newton, M; Hulsey, s; Hammon, J & Moore, W
Partner: UNT Libraries Government Documents Department
open access

Automated Test System for NIF Flashlamps

Description: This paper describes design and operation of the flashlamp test system, used to evaluate the primary laser flashlamps on the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory (LLNL) in Livermore, California. The tester delivers repetitive high voltage pulses to a series pair of flashlamps at levels closely simulating those encountered in normal operation. Each lamp pair is subjected to a pre-ionization and main pulse shot sequence, with two minute intervals between … more
Date: June 5, 2001
Creator: da Silva, T; Creely, P; Hammon, J; Shaw, R; Boyle, R T & Fulkerson, E S
Partner: UNT Libraries Government Documents Department
open access

Secondary Uranium-Phase Paragenesis and Incorporation of Radionuclides into Secondary Phase

Description: The purpose of this analysis/model report (AMR) is to assess the potential for uranium (U) (VI) compounds, formed during the oxidative corrosion of spent uranium-oxide (UO{sub 2}) fuels, to sequester certain radionuclides and, thereby, limit their release. The ''unsaturated drip tests'' being conducted at Argonne National Laboratory (ANL) provide the basis of this AMR (Table 1). The ANL drip tests on spent fuel are the only experiments on fuel corrosion from which solids have been analyzed for … more
Date: June 5, 2001
Creator: Finch, R.
Partner: UNT Libraries Government Documents Department
open access

10 (micro)m and 5 (micro)m Pinhole-Assisted Point-Projection Backlit Imaging for NIF

Description: Pinhole-assisted point-projection backlighting with 10{micro}m and 5 {micro}m pinholes placed a small distance of order 1 mm away from the backlighter produces images with large field of view and high resolution. Pinholes placed closely to high-power backlighter sources can vaporize and close due to x-ray driven ablation, thereby limiting the usefulness of this method. A study of streaked 1-D backlit imaging of 25 {micro}m W wires using the OMEGA laser is presented. The pinhole closure timescal… more
Date: June 5, 2001
Creator: Bullock, A. B.; Landen, O. L. & Bradley, D. K.
Partner: UNT Libraries Government Documents Department
open access

Strange Goings on in Quark Matter.

Description: We review recent work on how the superfluid state of three flavor quark matter is affected by non-zero quark masses and chemical potentials. The study of hadronic matter at high baryon density has recently attracted a lot of interest. At zero baryon density chiral symmetry is broken by a quark-anti-quark condensate. At high density condensation in the quark-anti-quark channel is suppressed. Instead, attractive interactions in the color anti-symmetric quark-quark channel favor the formation of d… more
Date: June 5, 2001
Creator: Schafer, T.
Partner: UNT Libraries Government Documents Department
open access

Manganin Gauge and Reactive Flow Modeling Study of the Shock Initiation of PBX 9501

Description: A series of 101mm diameter gas gun experiments was fired using manganin pressure gauges embedded in the HMX-based explosive PBX 9501 at initial temperatures of 20 C and 50 C. Flyer plate impact velocities were chosen to produce impact pressure levels in PBX 9501 at which the growth of explosive reaction preceding detonation was measured on most of the gauges and detonation pressure profiles were recorded on some of the gauges placed deepest into the explosive targets. All measured pressure hist… more
Date: June 5, 2001
Creator: Tarver, C M; Forbes, J W; Garcia, F & Urtiew, P A
Partner: UNT Libraries Government Documents Department
open access

Automatic Extraction of Closed Pixel Clusters for Target Cueing in Hyperspectral Images

Description: Traditional algorithms for automatic target cueing (ATC) in hyperspectral images, such as the RX algorithm, treat anomaly detection as a simple hypothesis testing problem. Each decision threshold gives rise to a different set of anomalous pixels. The clustered Rx algorithm generates target cues by grouping anomalous pixels into spatial clusters, and retaining only those clusters that satisfy target specific spatial constraints. It produces one set of target cues for each of several decision thr… more
Date: June 5, 2001
Creator: Paglieroni, D W & Perkins, D E
Partner: UNT Libraries Government Documents Department
open access

The Specification of Source-to-source Transformations for the Compile-time Optimization of Parallel Object-oriented Scientific Applications

Description: The performance of object-oriented applications in scientific computing often suffers from the inefficient use of high-level abstractions provided by underlying libraries. Since these library abstractions are not part of the programming language itself there is no compiler mechanism to respect their semantics and thus to perform appropriate optimizations, e.g., array semantics within object-oriented array class libraries which permit parallel optimizations inconceivable to the serial compiler. … more
Date: June 5, 2001
Creator: Quinlan, D & Kowarschik, M
Partner: UNT Libraries Government Documents Department
open access

Modeling The Effect of Drifts on the Edge, Scrape-Off Layer, and Divertor Plasma in DIII-D

Description: Simulations of plasmas with a DIII-D shape indicate plasma drifts are important at power levels near the L- to H-mode plasma transition. In addition to enhancing plasma flows in the divertor region, drifts are found to play a key role in establishing highly sheared radial electric fields in the edge of the confined plasma, for the physics of the high confinement operating mode (H-mode). Measurements of the plasma structure in the vicinity of the X-point of DIII-D indicate the importance of drif… more
Date: June 5, 2001
Creator: Porter, G. D.; Boedo, J. A.; Groebner, R. J.; Carlstrom, T. N.; Rognlien, T. D.; Rensink, M. E. et al.
Partner: UNT Libraries Government Documents Department
open access

Shock Initiation of UF-TATB at 250(degree)C

Description: The shock initiation properties of pure ultrafine grade triaminotrinitrobenzne (UF-TATB) pressed to an initial density of 1.80 g/cm{sup 3} and fired at ambient temperature and 250 C are reported. Embedded manganin pressure gauges are used to measure the pressure histories during the buildup to detonation at several input pressures. The ambient temperature results confirm previous run distance to detonation versus shock pressure results. UF-TATB at 250 C is shown to be much more shock sensitive … more
Date: June 5, 2001
Creator: Urtiew, P A; Forbes, J W; Garcia, F & Tarver, C M
Partner: UNT Libraries Government Documents Department
open access

A New Technique for Troubleshooting Large Capacitive Energy Storage Banks

Description: The Power Conditioning System (PCS) of the National Ignition Facility (NIF) like many pulse power systems relies on large numbers of inductively isolated high voltage capacitors configured in parallel for energy storage. When an energy storage capacitor fails in such a capacitor bank, there is often little or no external indication showing which capacitor failed. Identifying the failed component can be a time consuming and potentially hazardous operation. Conventional methods using capacitance … more
Date: June 5, 2001
Creator: Fulkerson, S E & Hammon, J
Partner: UNT Libraries Government Documents Department
open access

The Gender Wage Gap and Pay Equity: Is Comparable Worth the Next Step?

Description: This report mainly focuses on The Gender Wage Gap and Pay Equity. Women's participation in the labor market has undergone considerable change in the last few decades. The majority of today's married women have forsaken the traditional role of full time child care givers for the dual role of unpaid homemakers.
Date: June 5, 2001
Creator: Levine, Linda
Partner: UNT Libraries Government Documents Department
open access

Standard Formats for Atomic Data: the APED

Description: Standardized formats for atomic data used in calculating emission from a collisionally-ionized plasma are described. The formats use the astronomical-standard FITS format, and are extendible to other purposes, such as photoionization data. The formats emphasize storing references to the original data source and keeping the data in as-received form, to aid in checking against the original literature.
Date: June 5, 2001
Creator: Smith, R K; Brickhouse, N S; Liedahl, D A & Raymond, J C
Partner: UNT Libraries Government Documents Department
open access

Depleted uranium hexafluoride management program : data compilation for the Portsmouth site.

Description: This report is a compilation of data and analyses for the Portsmouth site, near Portsmouth, Ohio. The data were collected and the analyses were done in support of the U.S. Department of Energy (DOE) 1999 Programmatic Environmental Impact Statement for Alternative Strategies for the Long-Term Management and Use of Depleted Uranium Hexafluoride (DOE/EIS-0269). The report describes the affected environment at the Portsmouth site and summarizes potential environmental impacts that could result from… more
Date: June 5, 2001
Creator: Hartmann, H. M.
Partner: UNT Libraries Government Documents Department
open access

Depleted uranium hexafluoride management program : data compilation for the K-25 site.

Description: This report is a compilation of data and analyses for the K-25 site on the Oak Ridge Reservation, Oak Ridge, Tennessee. The data were collected and the analyses were done in support of the U.S. Department of Energy (DOE) 1999 Programmatic Environmental Impact Statement for Alternative Strategies for the Long-Term Management and Use of Depleted Uranium Hexafluoride (DOE/EIS-0269). The report describes the affected environment at the K-25 site and summarizes the potential environmental impacts th… more
Date: June 5, 2001
Creator: Hartmann, H. M.
Partner: UNT Libraries Government Documents Department
open access

Plasma Profile and Shape Optimization for the Advanced Tokamak Power Plant, ARIES-AT

Description: An advanced tokamak plasma configuration is developed based on equilibrium, ideal-MHD stability, bootstrap current analysis, vertical stability and control, and poloidal-field coil analysis. The plasma boundaries used in the analysis are forced to coincide with the 99% flux surface from the free-boundary equilibrium. Using an accurate bootstrap current model and external current-drive profiles from ray-tracing calculations in combination with optimized pressure profiles, beta(subscript N) value… more
Date: June 5, 2001
Creator: Kessel, C. E.; Mau, T. K.; Jardin, S. C. & Najmabadi, F.
Partner: UNT Libraries Government Documents Department
open access

Security Implications of Typical Grid Computing Usage Scenarios

Description: A Computational Grid is a collection of heterogeneous computers and resources spread across multiple administrative domains with the intent of providing users uniform access to these resources. There are many ways to access the resources of a Computational Grid, each with unique security requirements and implications for both the resource user and the resource provider. A comprehensive set of Grid usage scenarios are presented and analyzed with regard to security requirements such as authentica… more
Date: June 5, 2001
Creator: Humphrey, Marty & Thompson, Mary R.
Partner: UNT Libraries Government Documents Department
open access

Insulated Concrete Homes Increase Durability and Energy Efficiency

Description: New houses designed by Mercedes Homes in Melbourne, Florida, with technical support from the U.S. Department of Energy's Building America Program, save their homeowners money by using energy efficient features such as a high performance heat pump and solar control glazing to reduce cooling costs.
Date: June 5, 2001
Creator: America, Building; Hendron, B. & Poole, L.
Partner: UNT Libraries Government Documents Department
open access

PowerGuard Advanced Manufacturing, PVMaT Phase II Technical Progress Report; 1 July 1999--30 September 2000

Description: This project introduced incremental improvements to PowerGuard system components and manufacturing processes to significantly reduce the costs of a PowerGuard system. The improvement resulted in a lower cost, higher impact PV product. During Phase II, these accomplishments have resulted in: A production rate of greater than 400 PowerGuard tiles per shift (20 MW/year) manufacturing capacity; 57% cost reduction for PowerGuard tile; UL listing for four additional PowerGuard tiles configurations; I… more
Date: June 5, 2001
Creator: Dinwoodie, T. L. & Botkin, J.
Partner: UNT Libraries Government Documents Department
open access

Congo (formerly Zaire)

Description: This report discusses the Democratic Republic of the Congo, formerly Zaire, which is a vast-resource-rich country of 48 million people. Events there affect much of sub-Saharan Africa. In August 1998, Congo was plunged into its second civil war in 2 years. A peace accord was concluded in Lusaka, Zambia, in July and August 1999, and the U.N. Security Council later agreed to send a 5,500-member observer force, MONUC, to assist in the peace process. Fewer than 250 observers have gone to Congo, due … more
Date: June 5, 2001
Creator: Copson, Raymond W.
Partner: UNT Libraries Government Documents Department
open access

The Gender Wage Gap and Pay Equity: Is Comparable Worth the Next Step?

Description: This report mainly focuses on The Gender Wage Gap and Pay Equity. Women's participation in the labor market has undergone considerable change in the last few decades. The majority of today's married women have forsaken the traditional role of full time child care givers for the dual role of unpaid homemakers.
Date: June 5, 2001
Creator: Levine, Linda
Partner: UNT Libraries Government Documents Department
Back to Top of Screen