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Polycube Oxidation and Factors Affecting the Concentrations of Gaseous Products
The degraded polycube samples were tested in air and argon/oxygen atmospheres to determine the effect of size increase on the flammable gases concentrations. Within the size range tested, the flammable gas generation rate increases with increasing size but the extrapolation of the data to actual processing polycube size yielded flammable gas species concentration in the off-gas stream below the lower flammable limit of all the major gas species identified. Extreme surface area increase with a powder sample showed no significant effect on the flammable gas generation rate. The polycube went through the thermal stabilization process by undergoing both pyrolysis and oxidation generating at the end a plutonium oxide powder that showed unmeasurable weight change at 1273 K.
Date:
April 4, 2000
Creator:
Abrefah, John; MacFarlan, Paul J. & Sell, Rachel L.
System:
The UNT Digital Library
Portable and Transparent Message Compression in MPI Libraries to Improve the Performance and Scalability of Parallel Applications
The goal of this project has been to develop a lossless compression algorithm for message-passing libraries that can accelerate HPC systems by reducing the communication time. Because both compression and decompression have to be performed in software in real time, the algorithm has to be extremely fast while still delivering a good compression ratio. During the first half of this project, they designed a new compression algorithm called FPC for scientific double-precision data, made the source code available on the web, and published two papers describing its operation, the first in the proceedings of the Data Compression Conference and the second in the IEEE Transactions on Computers. At comparable average compression ratios, this algorithm compresses and decompresses 10 to 100 times faster than BZIP2, DFCM, FSD, GZIP, and PLMI on the three architectures tested. With prediction tables that fit into the CPU's L1 data acache, FPC delivers a guaranteed throughput of six gigabits per second on a 1.6 GHz Itanium 2 system. The C source code and documentation of FPC are posted on-line and have already been downloaded hundreds of times. To evaluate FPC, they gathered 13 real-world scientific datasets from around the globe, including satellite data, crash-simulation data, and …
Date:
April 17, 2009
Creator:
Albonesi, David & Burtscher, Martin
System:
The UNT Digital Library
Formulation of Moist Dynamics and Physics for Future Climate Models
In this project, one of our goals is to develop atmospheric models, in which innovative ideas on improving the quality of moisture predictions can be tested. Our other goal is to develop an explicit time integration scheme based on the multi-point differencing that does the same job as an implicit trapezoidal scheme but uses information only from limited number of grid points.
Date:
April 30, 2008
Creator:
Arakwa, Celal S. Konor and Akio
System:
The UNT Digital Library
Interface Documentation for MS Material Models
None
Date:
April 29, 2005
Creator:
Becker, R; Serednyakov, S; Skovpen, Y I; Solodov, E & Yushkov, A
System:
The UNT Digital Library
Core-Based Integrated Sedimentologic, Stratigraphic, and Geochemical Analysis of the Oil Shale Bearing Green River Formation, Uinta Basin, Utah
An integrated detailed sedimentologic, stratigraphic, and geochemical study of Utah's Green River Formation has found that Lake Uinta evolved in three phases (1) a freshwater rising lake phase below the Mahogany zone, (2) an anoxic deep lake phase above the base of the Mahogany zone and (3) a hypersaline lake phase within the middle and upper R-8. This long term lake evolution was driven by tectonic basin development and the balance of sediment and water fill with the neighboring basins, as postulated by models developed from the Greater Green River Basin by Carroll and Bohacs (1999). Early Eocene abrupt global-warming events may have had significant control on deposition through the amount of sediment production and deposition rates, such that lean zones below the Mahogany zone record hyperthermal events and rich zones record periods between hyperthermals. This type of climatic control on short-term and long-term lake evolution and deposition has been previously overlooked. This geologic history contains key points relevant to oil shale development and engineering design including: (1) Stratigraphic changes in oil shale quality and composition are systematic and can be related to spatial and temporal changes in the depositional environment and basin dynamics. (2) The inorganic mineral matrix of …
Date:
April 11, 2011
Creator:
Birgenheier, Lauren P. & Michael D. Vanden Berg,
System:
The UNT Digital Library
System Administration Guide for FEMIS Version 1.5
The Federal Emergency Management System (FEMIS) is an emergency management planning and response tool. The FEMIS System Administration Guide provides information on FEMIS System Administrator activities as well as the utilities that are included with FEMIS.
Date:
April 26, 2002
Creator:
Bower, John C.; Burnett, Robert A.; Carter, Richard J.; Downing, Timothy R.; Homer, Brian J.; Holter, Nancy A. et al.
System:
The UNT Digital Library
[Project Summary: Deepwater Program: The Archaeological and Biological Analysis of World War II Shipwrecks in the Gulf of Mexico: A Pilot Study of the Artificial Reef Effect in Deepwater]
Summary describing the work completed at C & C Technologies, Inc. for 'Deepwater Program: The Archaeological and Biological Analysis of World War II Shipwrecks in the Gulf of Mexico: A Pilot Study of the Artificial Reef Effect in Deepwater.' It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date:
April 2007
Creator:
C & C Technologies, Inc.
System:
The UNT Digital Library
Transcript of Commission on Wartime Contracting in Iraq & Afghanistan Hearing: April 1, 2011
Transcript of a public hearing held by the Commission on Wartime Contracting in Iraq & Afghanistan held April 1, 2011 in Washington, D.C. This hearing includes testimony from USAID administrator Dr. Rajiv Shah on the reform progress for the U.S. Agency for International Aid's contracting policy.
Date:
April 1, 2011
Creator:
CQ Transcriptions
System:
The UNT Digital Library
Transcript of Commission on Wartime Contracting in Iraq & Afghanistan Hearing: April 11, 2011
Transcript of a public hearing held by the Commission on Wartime Contracting in Iraq & Afghanistan held April 11, 2011 in Washington, D.C. This hearing includes an examination of the role of NGOs in the development of nations in a wartime environment. Testimony was received from four witnesses representing NGOs.
Date:
April 11, 2011
Creator:
CQ Transcriptions
System:
The UNT Digital Library
Transcript of Commission on Wartime Contracting in Iraq & Afghanistan Hearing: April 19, 2010
Transcript of a public hearing held by the Commission on Wartime Contracting in Iraq & Afghanistan held April 19, 2010 in Washington, D.C. This hearing includes testimony from two panels of witnesses representing governmental agencies and contractors on improving the federal government's oversight on service contracts in Southwest Asia operations.
Date:
April 19, 2010
Creator:
CQ Transcriptions
System:
The UNT Digital Library
Transcript of Commission on Wartime Contracting in Iraq & Afghanistan Hearing: April 25, 2011
Transcript of a public hearing held by the Commission on Wartime Contracting in Iraq & Afghanistan held April 25, 2011 in Washington D.C. This hearing includes testimony from five witnesses representing academic and government professional views on reform for contingency contracting.
Date:
April 25, 2011
Creator:
CQ Transcriptions
System:
The UNT Digital Library
Workshop on Environmental Issues Surrounding Deepwater Oil and Gas Development
A workshop in which issues concerning deepwater expansion and its impact on the environment were discussed.
Date:
April 1998
Creator:
Carney, Robert S.
System:
The UNT Digital Library
Rise Time Measurement for Ultrafast X-Ray Pulses
A pump-probe scheme measures the rise time of ultrafast x-ray pulses. Conventional high speed x-ray diagnostics (x-ray streak cameras, PIN diodes, diamond PCD devices) do not provide sufficient time resolution to resolve rise times of x-ray pulses on the order of 50 fs or less as they are being produced by modern fast x-ray sources. Here, we are describing a pump-probe technique that can be employed to measure events where detector resolution is insufficient to resolve the event. The scheme utilizes a diamond plate as an x-ray transducer and a p-polarized probe beam.
Date:
April 5, 2005
Creator:
Celliers, Peter M.; Weber, Franz A. & Moon, Stephen J.
System:
The UNT Digital Library
Temperature Trends in the Lower Atmosphere: Steps for Understanding and Reconciling Differences
This report focuses on understanding the causes of the differences between the atmospheric trends from the surface through the troposphere to the lower stratosphere.
Date:
April 2006
Creator:
Climate Change Science Program (U.S.)
System:
The UNT Digital Library
Carbon Isotopic Studies of Assimilated and Ecosystem Respired CO2 in a Southeastern Pine Forest
Carbon dioxide is the major “greenhouse” gas responsible for global warming. Southeastern pine forests appear to be among the largest terrestrial sinks of carbon dioxide in the US. This collaborative study specifically addressed the isotopic signatures of the large fluxes of carbon taken up by photosynthesis and given off by respiration in this ecosystem. By measuring these isotopic signatures at the ecosystem level, we have provided data that will help to more accurately quantify the magnitude of carbon fluxes on the regional scale and how these fluxes vary in response to climatic parameters such as rainfall and air temperature. The focus of the MBL subcontract was to evaluate how processes operating at the physiological and ecosystem scales affects the resultant isotopic signature of plant waxes that are emitted as aerosols into the convective boundary layer. These wax aerosols provide a large-spatial scale integrative signal of isotopic discrimination of atmospheric carbon dioxide by terrestrial photosynthesis (Conte and Weber 2002). The ecosystem studies have greatly expanded of knowledge of wax biosynthetic controls on their isootpic signature The wax aerosol data products produced under this grant are directly applicable as input for global carbon modeling studies that use variations in the concentration and …
Date:
April 10, 2008
Creator:
Conte, Maureen H.
System:
The UNT Digital Library
[Project Summary: Explosive Removal of Offshore Structures Information Search and Synthesis]
Summary describing the work completed at Continental Shelf Associates, Inc. for 'Explosive Removal of Offshore Structures Information Search and Synthesis.' It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date:
April 2004
Creator:
Continental Shelf Associates, Inc.
System:
The UNT Digital Library
Molecular Modeling and Simulation of Aqueous Electrolyte Systems
None
Date:
April 5, 2011
Creator:
Cummings, Peter
System:
The UNT Digital Library
Effect of coarse woody debris manipulation on soricid and herpetofaunal communities in upland pine stands of the southeastern coastal plain.
Abstract -The majority of studies investigating the importance of coarse woody debris (CWD) to forest- floor vertebrates have taken place in the Pacific Northwest and southern Appalachian Mountains, while comparative studies in the southeastern Coastal Plain are lacking. My study was a continuation of a long-term project investigating the importance of CWD as a habitat component for shrew and herpetofaunal communities within managed pine stands in the southeastern Coastal Plain. Results suggest that addition of CWD can increase abundance of southeastern and southern short-tailed shrews. However, downed wood does not appear to be a critical habitat component for amphibians and reptiles. Rising petroleum costs and advances in wood utilization technology have resulted in an emerging biofuels market with potential to decrease CWD volumes left in forests following timber harvests. Therefore, forest managers must understand the value of CWD as an ecosystem component to maintain economically productive forests while conserving biological diversity.
Date:
April 1, 2009
Creator:
Davis, Justin, Charles
System:
The UNT Digital Library
A Guide to Microsoft Active Directory (AD) Design
The goal of this paper is to facilitate the design process for those DOE sites that are currently engaged in designing their Active Directory (AD) network. It is a roadmap to enable analysis of the complicated design tradeoffs associated with Active Directory Design. By providing discussion of Active Directory design elements which are permanent and costly to change once deployed, the hope is to minimize the risks of sponsoring failed designs, or joining existing infrastructures not suitable to programmatic needs. Specifically, most Active Directory structures will fall under one of three common designs: Single Domain, Single Forest with Multiple Domains, or Multiple Forests. Each has benefits and concerns, depending on programmatic and organizational structures. The comparison of these three approaches will facilitate almost any Active Directory design effort. Finally, this paper describes some best practices to consider when designing Active Directory based on three years of research and experience.
Date:
April 29, 2002
Creator:
Dias, J
System:
The UNT Digital Library
Energy Market and Infrastructure Information for Evaluating Renewable Energy Projects for the Atlantic and Pacific OCS Regions, Volume 1: Technical Report
This report provides an overview of energy markets and synthesizes information that supports socioeconomic portions of environmental assessments and other types of Bureau of Ocean Energy Management (BOEM) decision documents related to renewable energy in the Atlantic and Pacific OCS regions.
Date:
April 2013
Creator:
Eastern Research Group, Inc.
System:
The UNT Digital Library
Energy Market and Infrastructure Information for Evaluating Renewable Energy Projects for the Atlantic and Pacific OCS Regions, Volume 2: Appendices
This report describes the regional reliability entities with significant opportunities for alternative energy resources on the Outer Continental Shelf.
Date:
April 2013
Creator:
Eastern Research Group, Inc.
System:
The UNT Digital Library
[Project Summary: Energy Market and Infrastructure Information for Evaluating Alternate Energy Projects for OCS Atlantic and Pacific Regions]
Summary describing the work completed at Eastern Research Group, Inc. for "Energy Market and Infrastructure Information for Evaluating Alternate Energy Projects for OCS Atlantic and Pacific Regions." It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date:
April 2013
Creator:
Eastern Research Group, Inc.
System:
The UNT Digital Library
EODC Migrant Manpower Project For Bexar County
A report on the Migrant Manpower Project of the Economic Opportunities Development Corporation in Bexar County.
Date:
April 10, 1972
Creator:
Economic Opportunities Development Corporation
System:
The Portal to Texas History
Opportunities for Near-Term Geothermal Development on Public Lands in the Western United States (CD-ROM)
This report provides information on priorities for U.S. Bureau of Land Management land-use planning in order to reduce barriers for accessing the public lands for geothermal development.
Date:
April 1, 2003
Creator:
Farhar, B. C. & Heimiller, D. M.
System:
The UNT Digital Library