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Advanced Hydrogen Transport Membranes for Vision 21 Fossil Fuel Plants

Description: During this quarter, work was focused on testing layered composite membranes under varying feed stream flow rates at high pressure. By optimizing conditions, H{sub 2} permeation rates as high as 423 mL {center_dot} min{sup -1} {center_dot} cm{sup -2} at 440 C were measured. Membrane stability was investigated by comparison to composite alloy membranes. Permeation of alloyed membranes showed a strong dependence on the alloying element. Impedance analysis was used to investigate bulk and grain bo… more
Date: July 26, 2004
Creator: Evenson, Carl R.; Sammells, Anthony F.; Mackay, Richard; Treglio, Richard; Rolfe, Sara L.; Blair, Richard et al.
Item Type: Refine your search to only Report
open access

CALFED Bay-Delta Program: Overview of Institutional and Water Use Issues

Description: The California Bay-Delta Program (CALFED) was initiated in 1995 to resolve water resources conflicts in the Sacramento/San Joaquin Rivers Delta and San Francisco Bay (Bay-Delta) in California. The program planning effort focused on developing a plan to address three main problem areas in the Bay-Delta: ecosystem health, water quality, and water supply reliability. CALFED was authorized to receive federal funding from FY1998 to FY2000, and is now being considered for reauthorization.
Date: July 26, 2004
Creator: Sheikh, Pervaze A. & Cody, Betsy A.
Item Type: Refine your search to only Report
open access

DEPENDENCY OF SULFATE SOLUBILITY ON MELT COMPOSITION AND MELT POLYMERIZATION

Description: Sulfate and sulfate salts are not very soluble in borosilicate waste glass. When sulfate is present in excess it can form water soluble secondary phases and/or a molten salt layer (gall) on the melt pool surface which is purported to cause steam explosions in slurry fed melters. Therefore, sulfate can impact glass durability while formation of a molten salt layer on the melt pool can impact processing. Sulfate solubility has been shown to be compositionally dependent in various studies, (e.g. ,… more
Date: July 26, 2004
Creator: JANTZEN, CAROLM.
Item Type: Refine your search to only Article
open access

DETECTION OF UNAUTHORIZED CONSTRUCTION EQUIPMENT IN PIPELINE RIGHT-OF-WAYS

Description: Natural gas transmission companies mark the right-of-way areas where pipelines are buried with warning signs to prevent accidental third-party damage. Nevertheless, pipelines are sometimes damaged by third-party construction equipment. A single incident can be devastating, causing death and millions of dollars of property loss. This damage would be prevented if potentially hazardous construction equipment could be detected, identified, and an alert given before the pipeline was damaged. The Gas… more
Date: July 26, 2004
Creator: Huebler, James E.
Item Type: Refine your search to only Report
open access

Development & Implementation of the Best Means of Correcting Vaisala Radiosonde Humidity & Temperature Measuremwnts

Description: The first of two main goals of this project has been to develop and implement a correction procedure that maximizes the accuracy of relative humidity (RH) measurements from ARM (Vaisala) radiosondes, and to evaluate the correction algorithm using a dataset of simultaneous measurements from Vaisala radiosones and the reference-quality NOAA/CMDL cryogenic hygrometer. The second main goal has been to determine how comparison of radiosonde RH measurements to reference-quality RH measurements obtain… more
Date: July 26, 2004
Creator: Miloshevich, Larry
Item Type: Refine your search to only Report
open access

Electron-Cloud Simulation and Theory for High-Current Heavy-Ion Beams

Description: Stray electrons can arise in positive-ion accelerators for heavy ion fusion or other applications as a result of ionization of ambient gas or gas released from walls due to halo-ion impact, or as a result of secondary- electron emission. We summarize the distinguishing features of electron cloud issues in heavy-ion-fusion accelerators and a plan for developing a self-consistent simulation capability for heavy-ion beams and electron clouds. We also present results from several ingredients in thi… more
Date: July 26, 2004
Creator: Cohen, R; Friedman, A; Lund, S; Molvik, A; Lee, E; Azevedo, T et al.
Item Type: Refine your search to only Article
open access

Error Analysis of Composite Shock Interaction Problems.

Description: We propose statistical models of uncertainty and error in numerical solutions. To represent errors efficiently in shock physics simulations we propose a composition law. The law allows us to estimate errors in the solutions of composite problems in terms of the errors from simpler ones as discussed in a previous paper. In this paper, we conduct a detailed analysis of the errors. One of our goals is to understand the relative magnitude of the input uncertainty vs. the errors created within the n… more
Date: July 26, 2004
Creator: Lee, T.; Yu, Y.; Zhao, M.; Glimm, J.; Li, X. & Ye, K.
Item Type: Refine your search to only Article
open access

An Improved N-Bit to N-Bit Reversible Haar-Like Transform

Description: We introduce the Piecewise-Linear Haar (PLHaar) transform, a reversible n-bit to n-bit transform that is based on the Haar wavelet transform. PLHaar is continuous, while all current n-bit to n-bit methods are not, and is therefore uniquely usable with both lossy and lossless methods (e.g. image compression). PLHaar has both integer and continuous (i.e. non-discrete) forms. By keeping the coefficients to n bits PLHaar is particularly suited for use in hardware environments where channel width is… more
Date: July 26, 2004
Creator: Senecal, J G; Lindstrom, P; Duchaineau, M A & Joy, K I
Item Type: Refine your search to only Article
open access

The Madden-Julian Oscillation in the National Center for Atmospheric Research Community Atmospheric Model-2 with the Tiedtke Convective Scheme

Description: The boreal winter Madden-Julian oscillation (MJO) remains very weak and irregular in structure in the National Center for Atmospheric Research (NCAR) Community Atmosphere Model version 2 (CAM2) as in its direct predecessor, the Community Climate Model version 3 (CCM3). The standard version of CAM2 uses the deep convective scheme of Zhang and McFarlane (1995), as in CCM3, with the closure dependent on convective available potential energy (CAPE). Here, sensitivity tests using several versions of… more
Date: July 26, 2004
Creator: Liu, P; Wang, B; Sperber, K R; Li, T & Meehl, G A
Item Type: Refine your search to only Article
open access

Mass Transfer Model for a Breached Waste Package

Description: The degradation of waste packages, which are used for the disposal of spent nuclear fuel in the repository, can result in configurations that may increase the probability of criticality. A mass transfer model is developed for a breached waste package to account for the entrainment of insoluble particles. In combination with radionuclide decay, soluble advection, and colloidal transport, a complete mass balance of nuclides in the waste package becomes available. The entrainment equations are der… more
Date: July 26, 2004
Creator: Hsu, C. & McClure, J.
Item Type: Refine your search to only Article
open access

Modeling the Long-Term Isolation Performance of Natural and Engineered Geologic CO2 Storage Sites

Description: Long-term cap rock integrity represents the single most important constraint on the long-term isolation performance of natural and engineered geologic CO{sub 2} storage sites. CO{sub 2} influx that forms natural accumulations and CO{sub 2} injection for EOR/sequestration or saline-aquifer disposal both lead to concomitant geochemical alteration and geomechanical deformation of the cap rock, enhancing or degrading its seal integrity depending on the relative effectiveness of these interdependent… more
Date: July 26, 2004
Creator: Johnson, J. W.; Nitao, J. J. & Morris, J. P.
Item Type: Refine your search to only Article
open access

Perfectly matched layers for Maxwell's equations in second order formulation

Description: We consider the two-dimensional Maxwell's equations in domains external to perfectly conducting objects of complex shape. The equations are discretized using a node-centered finite-difference scheme on a Cartesian grid and the boundary condition are discretized to second order accuracy employing an embedded technique which does not suffer from a ''small-cell'' time-step restriction in the explicit time-integration method. The computational domain is truncated by a perfectly matched layer (PML).… more
Date: July 26, 2004
Creator: Sjogreen, B & Petersson, A
Item Type: Refine your search to only Article
open access

Quantum leaps in philosophy of mind: Reply to Bourget'scritique

Description: David Bourget has raised some conceptual and technical objections to my development of von Neumann's treatment of the Copenhagen idea that the purely physical process described by the Schroedinger equation must be supplemented by a psychophysical process called the choice of the experiment by Bohr and Process 1 by von Neumann. I answer here each of Bourget's objections.
Date: July 26, 2004
Creator: Stapp, Henry P.
Item Type: Refine your search to only Article
open access

Reactive Transport Modelling of CO2 Storage in Saline Aquifers to Elucidate Fundamental Processes, Trapping Mechanisms, and Sequestration Partitioning

Description: The ultimate fate of CO{sub 2} injected into saline aquifers for environmental isolation is governed by three interdependent yet conceptually distinct processes: CO{sub 2} migration as a buoyant immiscible fluid phase, direct chemical interaction of this rising plume with ambient saline waters, and its indirect chemical interaction with aquifer and cap-rock minerals through the aqueous wetting phase. Each process is directly linked to a corresponding trapping mechanism: immiscible plume migrati… more
Date: July 26, 2004
Creator: Johnson, J. W.; Nitao, J. J. & Knauss, K. G.
Item Type: Refine your search to only Article
open access

REVERSIBLE N-BIT TO N-BIT INTEGER HAAR-LIKE TRANSFORMS

Description: We introduce TLHaar, an n-bit to n-bit reversible transform similar to the S-transform. TLHaar uses lookup tables that approximate the S-transform, but reorder the coefficients so they fit into n bits. TLHaar is suited for lossless compression in fixed-width channels, such as digital video channels and graphics hardware frame buffers. Tests indicate that when the incoming image data has lines or hard edges TLHaar coefficients compress better than S-transform coefficients. For other types of ima… more
Date: July 26, 2004
Creator: Senecal, J G; Duchaineau, M A & Joy, K I
Item Type: Refine your search to only Article
open access

Simulation of the Future LSST Data Pipelines

Description: In this paper we describe our approach to build a pipeline simulator for the future Large-scale Synoptic Survey Telescope (LSST). The simulated pipeline will be used to research and evaluate software architectures that are efficient and flexible. It will also be used to define the real-time software and hardware requirements needed to support the anticipated LSST data rates. The LSST data pipeline requirements are still being defined, however, previous surveys can provide a good source for data… more
Date: July 26, 2004
Creator: Abdulla, Ghaleb M.
Item Type: Refine your search to only Article
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