The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position' (open access)

The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position'

None
Date: October 31, 2001
Creator: Cobessi, D.; Huang, L.-S.; Ban, M.; Pon, N. G.; Daldal, F. & Berry, E. A.
Object Type: Article
System: The UNT Digital Library
Advanced Oil Recovery Technologies for Improved Recovery From Slope Basin Clastic Reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, Nm (open access)

Advanced Oil Recovery Technologies for Improved Recovery From Slope Basin Clastic Reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, Nm

The Nash Draw Brushy Canyon Pool (NDP) in southeast New Mexico is one of the nine projects selected in 1995 by the U.S. Department of Energy (DOE) for participation in the Class III Reservoir Field Demonstration Program. The goals of the DOE cost-shared Class Program are to: (1) extend economic production, (2) increase ultimate recovery, and (3) broaden information exchange and technology application. Reservoirs in the Class III Program are focused on slope basin and deep-basin clastic depositional types. Production at the NDP is from the Brushy Canyon formation, a low-permeability turbidite reservoir in the Delaware Mountain Group of Permian, Guadalupian age. A major challenge in this marginal-quality reservoir is to distinguish oil-productive pay intervals from water-saturated non-pay intervals. Because initial reservoir pressure is only slightly above bubble-point pressure, rapid oil decline rates and high gas/oil ratios are typically observed in the first year of primary production. Limited surface access, caused by the proximity of underground potash mining and surface playa lakes, prohibits development with conventional drilling. Reservoir characterization results obtained to date at the NDP show that a proposed pilot injection area appears to be compartmentalized. Because reservoir discontinuities will reduce effectiveness of a pressure maintenance project, the pilot …
Date: October 31, 2001
Creator: Murphy, Mark B.
Object Type: Report
System: The UNT Digital Library
AMBIENT PM2.5 SAMPLING AND ANALYSIS (open access)

AMBIENT PM2.5 SAMPLING AND ANALYSIS

This interim report summarizes detailed findings and conclusions drawn from evaluations of data obtained from the operation of ambient PM{sub 2.5} speciation sites in a geographical area encompassing southeastern Ohio, western Pennsylvania and northwestern West Virginia. The overall goal of this program, called the Upper Ohio River Valley Project (UORVP), is to better understand the relationship between coal-based power system emissions and ambient air quality in the Upper Ohio River Valley region through the collection of chemically resolved or speciated data. A summary of the sampling activities, sample analyses and the correlation and interpretation of data acquired from February 1999 through March of 2001 are reported. Mass and speciated data from urban and rural sources are compared and seasonal variations in PM{sub 2.5} distribution are also examined. Correlations between meteorological parameters and total PM{sub 2.5} mass are also presented.
Date: October 31, 2001
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Anderson Localization of Ballooning Modes, Quantum Chaos and the Stability of Compact Quasiaxially Symmetric Stellarators (open access)

Anderson Localization of Ballooning Modes, Quantum Chaos and the Stability of Compact Quasiaxially Symmetric Stellarators

The radially local magnetohydrodynamic (MHD) ballooning stability of a compact, quasiaxially symmetric stellarator (QAS), is examined just above the ballooning beta limit with a method that can lead to estimates of global stability. Here MHD stability is analyzed through the calculation and examination of the ballooning mode eigenvalue isosurfaces in the 3-space [s, alpha, theta(subscript ''k'')]; s is the edge normalized toroidal flux, alpha is the field line variable, and q(subscript ''k'') is the perpendicular wave vector or ballooning parameter. Broken symmetry, i.e., deviations from axisymmetry, in the stellarator magnetic field geometry causes localization of the ballooning mode eigenfunction, and gives rise to new types of nonsymmetric eigenvalue isosurfaces in both the stable and unstable spectrum. For eigenvalues far above the marginal point, isosurfaces are topologically spherical, indicative of strong ''quantum chaos.'' The complexity of QAS marginal isosurfaces suggests that finite Larmor radius stabilization estimates will be difficult and that fully three-dimensional, high-n MHD computations are required to predict the beta limit.
Date: October 31, 2001
Creator: Redi, M. H.; Johnson, J. L.; Klasky, S.; Canik, J.; Dewar, R. L. & Cooper, W. A.
Object Type: Report
System: The UNT Digital Library
A beta test of linear tape-open (LTO) ultrium data storage technology (open access)

A beta test of linear tape-open (LTO) ultrium data storage technology

NERSC is participating in several HPSS (High Performance Storage System) research and development projects as part of the Probe testbed. One of these projects involved beta testing of the IBM 3584 UltraScalable Tape Library, which uses the new ultra-high-density Linear Tape-Open (LTO) Ultrium tape drives. Ultrium tape cartridges have a capacity of up to 300 GB of compressed data, greatly reducing the number of cartridges needed to store massive scientific datasets. NERSC's preliminary performance testing indicates that LTO Ultrium technology, with compatible products and media available from several vendors, may be a viable alternative for computer centers seeking higher-density archival storage media with a small footprint and relatively low cost per drive.
Date: October 31, 2001
Creator: Cholia, Shreyas & Meyer, Nancy
Object Type: Report
System: The UNT Digital Library
Caustic Leaching of Hanford Tank S-110 Sludge (open access)

Caustic Leaching of Hanford Tank S-110 Sludge

This report describes the Hanford Tank S-110 sludge caustic leaching test conducted in FY 2001 at the Pacific Northwest National Laboratory. The data presented here can be used to develop the baseline and alternative flowsheets for pretreating Hanford tank sludge. The U.S. Department of Energy funded the work through the Efficient Separations and Processing Crosscutting Program.
Date: October 31, 2001
Creator: Lumetta, Gregg J; Carson, Katharine J; Darnell, Lori P; Greenwood, Lawrence R; Hoopes, Francis V; Sell, Richard L et al.
Object Type: Report
System: The UNT Digital Library
Caustic Leaching of Hanford Tank S-110 Sludge (open access)

Caustic Leaching of Hanford Tank S-110 Sludge

This report describes the Hanford Tank S-110 sludge caustic leaching test conducted in FY 2001 at the Pacific Northwest National Laboratory. The data presented here can be used to develop the baseline and alternative flowsheets for pretreating Hanford tank sludge. The U.S. Department of Energy funded the work through the Efficient Separations and Processing Crosscutting Program (ESP; EM50).
Date: October 31, 2001
Creator: Lumetta, Gregg J.; Carson, Katharine J.; Darnell, Lori P.; Greenwood, Lawrence R.; Hoopes, Francis V.; Sell, Richard L. et al.
Object Type: Report
System: The UNT Digital Library
DEVELOPING STATE POLICIES SUPPORTIVE OF BIOENERGY DEVELOPMENT (open access)

DEVELOPING STATE POLICIES SUPPORTIVE OF BIOENERGY DEVELOPMENT

Working within the context of the Southern States Biobased Alliance (SSBA) and with officials in each state, the Southern States Energy Board (SSEB) is identifying bioenergy-related policies and programs within each state to determine their impact on the development, deployment or use of bioenergy. In addition, SSEB will determine which policies have impacted industry's efforts to develop, deploy or use biobased technologies or products. As a result, SSEB will work with the Southern States Biobased Alliance to determine how policy changes might address any negative impacts or enhance positive impacts.
Date: October 31, 2001
Creator: Baskin, Kathryn
Object Type: Report
System: The UNT Digital Library
Development of Interfacial Structure in a Confined Air-Water Cap-Turbulent and Churn-Turbulent Flow (open access)

Development of Interfacial Structure in a Confined Air-Water Cap-Turbulent and Churn-Turbulent Flow

The objective of the present work is to study and model the interfacial structure development of air-water two-phase flow in a confined test section. Experiments of a total of 9 flow conditions in a cap-turbulent and churn-turbulent flow regimes are carried out in a vertical air-water upward two-phase flow experimental loop with a test section of 20-cm in width and 1-cm in gap. The miniaturized four-sensor conductivity probes are used to measure local two-phase parameters at three different elevations for each flow condition. The bubbles captured by the probes are categorized into two groups in view of the two-group interfacial area transport equation, i.e., spherical/distorted bubbles as Group 1 and cap/churn-turbulent bubbles as Group 2. The acquired parameters are time-averaged local void fraction, interfacial velocity, bubble number frequency, interfacial area concentration, and bubble Sauter mean diameter for both groups of bubbles. Also, the line-averaged and area-averaged data are presented and discussed. The comparisons of these parameters at different elevations demonstrate the development of interfacial structure along the flow direction due to bubble interactions.
Date: October 31, 2001
Creator: Sun, X.; Kim, S.; Cheng, L.; Ishii, M. & Beus, S.G.
Object Type: Article
System: The UNT Digital Library
DEVELOPMENT OF OTM SYNGAS PROCESS AND TESTING OF SYNGAS-DERIVED ULTRA-CLEAN FUELS IN DIESEL ENGINES AND FUEL CELLS (open access)

DEVELOPMENT OF OTM SYNGAS PROCESS AND TESTING OF SYNGAS-DERIVED ULTRA-CLEAN FUELS IN DIESEL ENGINES AND FUEL CELLS

This topical report summarizes work accomplished for the Program from January 1 through September 15, 2001 in the following task areas: Task 1--materials development; Task 2--composite element development; Task 3--tube fabrication; Task 4--reactor design and process optimization; Task 5--catalyst development; Task 6--P-1 operation; Task 8--fuels and engine testing; and Task 10--project management. OTM benchmark material, LCM1, exceeds the commercial oxygen flux target and was determined to be sufficiently robust to carry on process development activities. Work will continue on second-generation OTM materials that will satisfy commercial life targets. Three fabrication techniques for composite elements were determined to be technically feasible. These techniques will be studied and a lead manufacturing process for both small and large-scale elements will be selected in the next Budget Period. Experiments in six P-0 reactors, the long tube tester (LTT) and the P-1 pilot plant were conducted. Significant progress in process optimization was made through both the experimental program and modeling studies of alternate reactor designs and process configurations. Three tailored catalyst candidates for use in OTM process reactors were identified. Fuels for the International diesel engine and Nuvera fuel cell tests were ordered and delivered. Fuels testing and engine development work is now underway.
Date: October 31, 2001
Creator: Robinson, E.T. (Skip); Meagher, James P. & Prasad, Ravi
Object Type: Report
System: The UNT Digital Library
FIDDLER CREEK POLYMER AUGMENTATION PROJECT (open access)

FIDDLER CREEK POLYMER AUGMENTATION PROJECT

The Fiddler Creek field is in Weston County, Wyoming, and was discovered in 1948. Secondary waterflooding recovery was started in 1955 and terminated in the mid-1980s with a fieldwide recovery of approximately 40%. The West Fiddler Creek Unit, the focus of this project, had a lower recovery and therefore has the most remaining oil. Before the project this unit was producing approximately 85 bbl of oil per day from 20 pumping wells and 17 swab wells. The recovery process planned for this project involved adapting two independent processes, the injection of polymer as a channel blocker or as a deep-penetrating permeability modifier, and the stabilization of clays and reduction of the residual oil saturation in the near-wellbore area around the injection wells. Clay stabilization was not conducted because long-term fresh water injection had not severely reduced the injectivity. It was determined that future polymer injection would not be affected by the clay. For the project, two adjoining project patterns were selected on the basis of prior reservoir studies and current well availability and production. The primary injection well of Pattern 1 was treated with a small batch of MARCIT gel to create channel blocking. The long-term test was designed for …
Date: October 31, 2001
Creator: Johnson, Lyle A., Jr.
Object Type: Report
System: The UNT Digital Library
Forecasting the Growth of Green Power Markets in the United States (open access)

Forecasting the Growth of Green Power Markets in the United States

In this report, we quantify the potential size and impact of the green power market in the United States, and identify features of the market that will most affect its ultimate growth trajectory.
Date: October 31, 2001
Creator: Wiser, R.; Bolinger, M. (Lawrence Berkeley National Laboratory); Holt, E. (Ed Holt and Associates, Inc.) & Swezey, B. (National Renewable Energy Laboratory)
Object Type: Report
System: The UNT Digital Library
FY 2002 Integrated Monitoring Plan for the Hanford Groundwater Monitoring Project (open access)

FY 2002 Integrated Monitoring Plan for the Hanford Groundwater Monitoring Project

This document is an integrated monitoring plan for the groundwater project and contains: well and constituent lists for monitoring required by the Atomic Energy Act of 1954 and its implementing orders ("surveillance monitoring"); other, established monitoring plans by reference; and a master well/ constituent/frequency matrix for the entire Hanford Site.
Date: October 31, 2001
Creator: Hartman, Mary J.; Dresel, P Evan; Lindberg, Jonathan W.; Newcomer, Darrell R. & Thornton, Edward C.
Object Type: Report
System: The UNT Digital Library
FY 2002 Integrated Monitoring Plan for the Hanford Groundwater Monitoring Project (open access)

FY 2002 Integrated Monitoring Plan for the Hanford Groundwater Monitoring Project

This document is an integrated monitoring plan for the groundwater project and contains: well and constituent lists for monitoring required by the Atomic Energy Act of 1954 and its implementing orders (''surveillance monitoring''); other, established monitoring plans by reference; and a master well/ constituent/frequency matrix for the entire Hanford Site.
Date: October 31, 2001
Creator: Hartman, Mary J; Dresel, P Evan; Lindberg, Jon W; Newcomer, Darrell R & Thornton, Edward C
Object Type: Report
System: The UNT Digital Library
A Germanium-Based, Coded Aperture Imager (open access)

A Germanium-Based, Coded Aperture Imager

We describe a coded-aperture based, gamma-ray imager that uses a unique hybrid germanium detector system. A planar, germanium strip detector, eleven millimeters thick is followed by a coaxial detector. The 19 x 19 strip detector (2 mm pitch) is used to determine the location and energy of low energy events. The location of high energy events are determined from the location of the Compton scatter in the planar detector and the energy is determined from the sum of the coaxial and planar energies. With this geometry, we obtain useful quantum efficiency in a position-sensitive mode out to 500 keV. The detector is used with a 19 x 17 URA coded aperture to obtain spectrally resolved images in the gamma-ray band. We discuss the performance of the planar detector, the hybrid system and present images taken of laboratory sources.
Date: October 31, 2001
Creator: Ziock, K P; Madden, N; Hull, E; William, C; Lavietes, T & Cork, C
Object Type: Article
System: The UNT Digital Library
Grid technologies and applications : architecture and achievements. (open access)

Grid technologies and applications : architecture and achievements.

None
Date: October 31, 2001
Creator: Foster, I.
Object Type: Article
System: The UNT Digital Library
High Efficancy Integrated Under-Cabinet Phosphorescent OLED (open access)

High Efficancy Integrated Under-Cabinet Phosphorescent OLED

In this two year program Universal Display Corporation (UDC) together with the University of Michigan, Teknokon, developed and delivered an energy efficient phosphorescent OLED under cabinet illumination system. Specifically the UDC team goal was in 2011 to deliver five (5) Beta level OLED under cabinet lighting fixtures each consisting of five 6-inch x 6-inch OLED lighting panels, delivering over 420 lumens, at an overall system efficacy of >60 lm/W, a CRI of >85, and a projected lifetime to 70% of initial luminance to exceed 20,000 hours. During the course of this program, the Team pursued the commercialization of these OLED based under cabinet lighting fixtures, to enable the launch of commercial OLED lighting products. The UDC team was ideally suited to develop these novel and efficient solid state lighting fixtures, having both the technical experience and commercial distribution mechanisms to leverage work performed under this contract. UDC's business strategy is to non-exclusively license its PHOLED technology to lighting manufacturers, and also supply them with our proprietary PHOLED materials. UDC is currently working with several licensees who are manufacturing OLED lighting panels using our technology. During this 2 year program, we further developed our high efficiency white Phosphorescent OLEDs from the …
Date: October 31, 2001
Creator: Hack, Michael
Object Type: Report
System: The UNT Digital Library
In-Drift Microbial Communities Model Validation Calculation (open access)

In-Drift Microbial Communities Model Validation Calculation

The objective and scope of this calculation is to create the appropriate parameter input for MING 1.0 (CSCI 30018 V1.0, CRWMS M&O 1998b) that will allow the testing of the results from the MING software code with both scientific measurements of microbial populations at the site and laboratory and with natural analogs to the site. This set of calculations provides results that will be used in model validation for the ''In-Drift Microbial Communities'' model (CRWMS M&O 2000) which is part of the Engineered Barrier System Department (EBS) process modeling effort that eventually will feed future Total System Performance Assessment (TSPA) models. This calculation is being produced to replace MING model validation output that is effected by the supersession of DTN MO9909SPAMING1.003 using its replacement DTN MO0106SPAIDM01.034 so that the calculations currently found in the ''In-Drift Microbial Communities'' AMR (CRWMS M&O 2000) will be brought up to date. This set of calculations replaces the calculations contained in sections 6.7.2, 6.7.3 and Attachment I of CRWMS M&O (2000) As all of these calculations are created explicitly for model validation, the data qualification status of all inputs can be considered corroborative in accordance with AP-3.15Q. This work activity has been evaluated in accordance …
Date: October 31, 2001
Creator: Jolley, D. M.
Object Type: Report
System: The UNT Digital Library
Innovative Fossil Fuel Fired Vitrification Technology for Soil Remediation: Final Report, Phase 3, 3A/4 (open access)

Innovative Fossil Fuel Fired Vitrification Technology for Soil Remediation: Final Report, Phase 3, 3A/4

This Final Report summarizes the progress of Phases 3,3A and 4 of a waste technology Demonstration Project sponsored under a DOE Environmental Management Research and Development Program and administered by the U.S. Department of Energy National Energy Technology Laboratory-Morgantown (DOE-NETL) for an ''Innovative Fossil Fuel Fired Vitrification Technology for Soil Remediation''. The Summary Reports for Phases 1 and 2 of the Program were previously submitted to DOE. The total scope of Phase 3 was to have included the design, construction and demonstration of Vortec's integrated waste pretreatment and vitrification process for the treatment of low level waste (LLW), TSCA/LLW and mixed low-level waste (MLLW). Due to funding limitations and delays in the project resulting from a law suit filed by an environmental activist and the extended time for DOE to complete an Environmental Assessment for the project, the scope of the project was reduced to completing the design, construction and testing of the front end of the process which consists of the Material Handling and Waste Conditioning (MH/C) Subsystem of the vitrification plant. Activities completed under Phases 3A and 4 addressed completion of the engineering, design and documentation of the MH/C System such that final procurement of the remaining process …
Date: October 31, 2001
Creator: Hnat, J.; Bartone, L. M. & Pineda, M.
Object Type: Report
System: The UNT Digital Library
Measurement of Helium-3/Helium-4 Ratios in Soil Gas at the 618-11 Burial Ground (open access)

Measurement of Helium-3/Helium-4 Ratios in Soil Gas at the 618-11 Burial Ground

Seventy soil gas-sampling points were installed around the perimeter of the 618-11 Burial Ground, approximately 400 feet downgradient of well 699-13-3A, and in four transects downgradient of the burial ground to a maximum distance of 3,100 feet. Soil gas samples were collected and analyzed for helium-3/helium-4 ratios from these 70 points. Helium-3/helium-4 ratios determined from the soil gas sampling points showed significant enrichments, relative to ambient air helium-3 concentrations. The highest concentrations were located along the northern perimeter of the burial ground. Helium-3/helium-4 ratios (normalized to the abundances in ambient air) ranged from 1.0 to 62 around the burial ground. The helium-3/helium-4 ratios from the 4 transect downgradient of the burial ground ranged from 0.988 to 1.68. The helium-3/helium-4 ratios from around the burial ground suggest there is a vadose zone source of tritium along the north side of the burial ground. This vadose zone source is likely the source of tritium in the groundwater. The helium-3/helium-4 ratios also suggest the groundwater plume is traveling east-northeast from the burial ground and the highest groundwater tritium value may be to the north of well 699-13-3A. Finally, there appears to be no immediately upgradient sources of tritium impacting the burial ground since …
Date: October 31, 2001
Creator: Olsen, Khris B.; Dresel, P Evan & Evans, John C.
Object Type: Report
System: The UNT Digital Library
Measurement of Helium-3/Helium-4 Ratios in Soil Gas at the 618-11 Burial Ground (open access)

Measurement of Helium-3/Helium-4 Ratios in Soil Gas at the 618-11 Burial Ground

Seventy soil gas-sampling points were installed around the perimeter of the 618-11 Burial Ground, approximately 400 feet downgradient of well 699-13-3A, and in four transects downgradient of the burial ground to a maximum distance of 3,100 feet. Soil gas samples were collected and analyzed for helium-3/helium-4 ratios from these 70 points. Helium-3/helium-4 ratios determined from the soil gas sampling points showed significant enrichments, relative to ambient air helium-3 concentrations. The highest concentrations were located along the northern perimeter of the burial ground. Helium-3/helium-4 ratios (normalized to the abundances in ambient air) ranged from 1.0 to 62 around the burial ground. The helium-3/helium-4 ratios from the 4 transect downgradient of the burial ground ranged from 0.988 to 1.68. The helium-3/helium-4 ratios from around the burial ground suggest there is a vadose zone source of tritium along the north side of the burial ground.
Date: October 31, 2001
Creator: Olsen, Khris B; Dresel, P Evan & Evans, John C
Object Type: Report
System: The UNT Digital Library
Modern Tools for Modern Software (open access)

Modern Tools for Modern Software

This is a proposal for a new software configure/build tool for building, maintaining, deploying, and installing software. At its completion, this new tool will replace current standard tool suites such as ''autoconf'', ''automake'', ''libtool'', and the de facto standard build tool, ''make''. This ambitious project is born out of the realization that as scientific software has grown in size and complexity over the years, the difficulty of configuring and building software has increased as well. For high performance scientific software, additional complexities often arises from the need for portability to multiple platforms (including many one-of-a-kind platforms), multilanguage implementations, use of third party libraries, and a need to adapt algorithms to the specific features of the hardware. Development of scientific software is being hampered by the quality of configuration and build tools commonly available. Inordinate amounts of time and expertise are required to develop and maintain the configure and build system for a moderately complex project. Better build and configure tools will increase developer productivity. This proposal is a first step in a process of shoring up the foundation upon which DOE software is created and used.
Date: October 31, 2001
Creator: Kumfert, G & Epperly, T
Object Type: Report
System: The UNT Digital Library
NIF Beam Shaping Masks (open access)

NIF Beam Shaping Masks

None
Date: October 31, 2001
Creator: Bowers, M.
Object Type: Report
System: The UNT Digital Library
Preliminary Feasibility Study of Using Solid-State Nuclear Magnetic Resonance Spectroscopy to Characterize Hanford Tank Waste Solids (open access)

Preliminary Feasibility Study of Using Solid-State Nuclear Magnetic Resonance Spectroscopy to Characterize Hanford Tank Waste Solids

This report describes experiments performed in FY 2001 to examine the feasibility of using nuclear magnetic resonance (NMR) spectroscopy to characterize Hanford tank sludge solids. The results demonstrate the potential utility of magic-angle spinning solid-state NMR spectroscopy for this purpose. We have shown that 27Al NMR signals can be easily detected in samples simulating the compositions of Hanford tank sludge solids. Different Al-containing species can be distinguished on the basis of a number of characteristics, including resonance frequency, lineshape, and response to excitation pulse length of the 27Al NMR signal. This work also indicates that 23Na NMR can likely be used to identify specific Na-containing phases present in tank wastes. It is expected that other NMR-active nuclides can be probed for information about specific phases present in tank-waste solids.
Date: October 31, 2001
Creator: Cho, Herman M. & Lumetta, Gregg J.
Object Type: Report
System: The UNT Digital Library