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At Risk: Capturing and Preserving Web Resources

Description: This presentation discusses the Web-at-Risk project and the issues related to capturing and preserving web resources. It introduces collection development issues, organization and metadata issues, and the findings that support the needs for a web archiving service.
Date: June 12, 2006
Creator: Hartman, Cathy Nelson & Murray, Kathleen R.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries
open access

Convergence Analysis of a Domain Decomposition Paradigm

Description: We describe a domain decomposition algorithm for use in several variants of the parallel adaptive meshing paradigm of Bank and Holst. This algorithm has low communication, makes extensive use of existing sequential solvers, and exploits in several important ways data generated as part of the adaptive meshing paradigm. We show that for an idealized version of the algorithm, the rate of convergence is independent of both the global problem size N and the number of subdomains p used in the domain … more
Date: June 12, 2006
Creator: Bank, R E & Vassilevski, P S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improved Technology To Prevent Nuclear Proliferation And Counter Nuclear Terrorism

Description: As the world moves into the 21st century, the possibility of greater reliance on nuclear energy will impose additional technical requirements to prevent proliferation. In addition to proliferation resistant reactors, a careful examination of the various possible fuel cycles from cradle to grave will provide additional technical and nonproliferation challenges in the areas of conversion, enrichment, transportation, recycling and waste disposal. Radiation detection technology and information mana… more
Date: June 12, 2006
Creator: Richardson, J; Yuldashev, B; Labov, S & Knapp, R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ion Implanted Ge:B Far Infrard Blocked Impurity BandDetectors

Description: Ge Blocked Impurity Band (BIB) photoconductors have the potential to replace stressed Ge:Ga photoconductors for far-infrared astronomical observations. A novel planar BIB device has been fabricated in which ion-implanted boron is used to form the blocking and absorbing layers of necessary purity and compensation. The effect of doping in the infrared active layer on the far-infrared photoconductive response has been studied, and the optimum doping concentration is found to be {approx} 4 x 10{sup… more
Date: June 12, 2006
Creator: Beeman, J. W.; Goyal, S.; Reichertz, L. A. & Haller, E. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Method for the Automatic Detection of Insect Clutter in Doppler-Radar Returns.

Description: The accurate detection and removal of insect clutter from millimeter wavelength cloud radar (MMCR) returns is of high importance to boundary layer cloud research (e.g., Geerts et al., 2005). When only radar Doppler moments are available, it is difficult to produce a reliable screening of insect clutter from cloud returns because their distributions overlap. Hence, screening of MMCR insect clutter has historically involved a laborious manual process of cross-referencing radar moments against mea… more
Date: June 12, 2006
Creator: Luke,E.; Kollias, P. & Johnson, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An Arbitrary Lagrangian-Eulerian Discretization of MHD on 3D Unstructured Grids

Description: We present an arbitrary Lagrangian-Eulerian (ALE) discretization of the equations of resistive magnetohydrodynamics (MHD) on unstructured hexahedral grids. The method is formulated using an operator-split approach with three distinct phases: electromagnetic diffusion, Lagrangian motion, and Eulerian advection. The resistive magnetic dynamo equation is discretized using a compatible mixed finite element method with a 2nd order accurate implicit time differencing scheme which preserves the diverg… more
Date: June 12, 2006
Creator: Rieben, R. N.; White, D. A.; Wallin, B. K. & Solberg, J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multigrid Methods for Mesh Relaxation

Description: When generating a mesh for the initial conditions for a computer simulation, you want the mesh to be as smooth as possible. A common practice is to use equipotential mesh relaxation to smooth out a distorted computational mesh. Typically a Laplace-like equation is set up for the mesh coordinates and then one or more Jacobi iterations are performed to relax the mesh. As the zone count gets really large, the Jacobi iteration becomes less and less effective and we are stuck with our original unrel… more
Date: June 12, 2006
Creator: O'Brien, M J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The NIF Ignition Program: Progress And Planning

Description: The first experimental campaign for ignition, beginning in 2010 after NIF construction and commissioning are completed, will include experiments to measure and optimize key laser and target conditions necessary for ignition. These ''tuning campaigns'' will precede the first ignition shots. Ignition requires acceptable target performance in several key areas: Energetics, Symmetry, Shock timing, and Capsule Hydrodynamics. Detailed planning and simulations for ''tuning campaigns'' in each of these… more
Date: June 12, 2006
Creator: Hammel, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Program Pu Futures 2006

Description: The coordination chemistry of plutonium remains relatively unexplored. Thus, the fundamental coordination chemistry of plutonium is being studied using simple multi-dentate ligands with the intention that the information gleaned from these studies may be used in the future to develop plutonium-specific sequestering agents. Towards this goal, hard Lewis-base donors are used as model ligands. Maltol, an inexpensive natural product used in the commercial food industry, is an ideal ligand because i… more
Date: June 12, 2006
Creator: Fluss, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Magnetic Field Line Tracing Calculations for Conceptual PFC Design in the National Compact Stellarator Experiment

Description: The National Compact Stellarator Experiment (NCSX) is a three-field period compact stellarator presently in the construction phase at Princeton, NJ. The design parameters of the device are major radius R=1.4m, average minor radius <a> = 0.32m, 1.2 {le} toroidal field (B{sub t}) {le} 1.7 T, and auxiliary input power up to 12 MW with neutral beams and radio-frequency heating. The NCSX average aspect ratio <R/a> of 4.4 lies well below present stellarator experiments and designs, enabli… more
Date: June 12, 2006
Creator: Maingi, R; Kaiser, T; Hill, D N; Lyon, J F; Monticello, D & Zarnstorff, M C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The MARX Modulator Development Program for the International Linear Collider

Description: The ILC Marx Modulator Development Program at SLAC is working towards developing a full-scale ILC Marx ''Reference Design'' modulator prototype, with the goal of significantly reducing the size and cost of the ILC modulator while improving overall modulator efficiency and availability. The ILC Reference Design prototype will provide a proof-of-concept model to industry in advance of Phase II SBIR funding, and also allow operation of the new 10MW L-Band Klystron prototypes immediately upon their… more
Date: June 12, 2006
Creator: Leyh, G. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects of WENO flux reconstruction order and spatial resolution on reshocked two-dimensional Richtmyer-Meshkov instability

Description: Weighted essentially non-oscillatory (WENO) simulations of the reshocked two-dimensional single-mode Richtmyer-Meshkov instability using third-, fifth- and ninth-order spatial flux reconstruction and uniform grid resolutions corresponding to 128, 256 and 512 points per initial perturbation wavelength are presented. The dependence of the density, vorticity, simulated density Schlieren and baroclinic production fields, mixing layer width, circulation deposition, mixing profiles, production and mi… more
Date: June 12, 2006
Creator: Latini, M; Schilling, O & Don, W S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Brazil-U.S. Relations

Description: This report analysis Brazil's political, economic, and social conditions, and how those conditions affect its role in the world and its relationship with the United States.
Date: June 12, 2006
Creator: Ribando, Clare M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Near-Core and In-Core Neutron Radiation Monitors for Real Time Neutron Flux Monitoring and Reactor Power Level Measurements

Description: MPFDs are a new class of detectors that utilize properties from existing radiation detector designs. A majority of these characteristics come from fission chamber designs. These include radiation hardness, gamma-ray background insensitivity, and large signal output.
Date: June 12, 2006
Creator: McGregor, Douglas S.; Adams, Marvin L.; Carron, Igor & Nelson, Paul
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Configurational forces in solid nanostructures

Description: The DOE grant (DE-FG02-99ER45787) to Princeton University, entitled Configurational Forces in Solid Nanostructures, was intended to cover the four-year period from September 1999 to September 2003. Effective 1 July 2003, the PI will relocate from Princeton to join the Harvard faculty. Princeton University will submit the Final Financial Report, the Final Property Report, and the Final Patent Report. The expenditures to date are $261,513 with %8,487 remaining of the awarded amount of $320,000. H… more
Date: June 12, 2006
Creator: Suo, Zhigang
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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