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386 Matching Results
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Investigation of Contaminant Sources at Navarre, Kansas.
The results of the 2006 investigation of contaminant sources at Navarre, Kansas, clearly demonstrate the following: {sm_bullet} Sources of carbon tetrachloride contamination were found on the Navarre Co-op property. These sources are the locations of the highest concentrations of carbon tetrachloride found in soil and groundwater at Navarre. The ongoing groundwater contamination at Navarre originates from these sources. {sm_bullet} The sources on the Co-op property are in locations where the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) never conducted grain storage operations. {sm_bullet} No definitive sources of carbon tetrachloride were identified on the portion of the current Co-op property formerly used by the CCC/USDA. {sm_bullet} The source areas on the Co-op property are consistent with the locations of the most intense Co-op operations, both historically and at present. The Co-op historically stored carbon tetrachloride for retail sale and used it as a grain fumigant in these locations. {sm_bullet} The distribution patterns of other contaminants (tetrachloroethene and nitrate) originating from sources on the Co-op property mimic the carbon tetrachloride plume. These other contaminants are not associated with CCC/USDA operations. {sm_bullet} The distribution of carbon tetrachloride at the Co-op source areas, particularly the absence of contamination in soils at …
Date:
November 5, 2007
Creator:
LaFreniere, L. M. & Division, Environmental Science
Object Type:
Report
System:
The UNT Digital Library
Electronic and magnetic properties of zincblende half-metal superlattices
Zincblende half-metallic compounds such as CrAs, with large magnetic moments and high Curie temperatures, are promising materials for spintronic applications. They explore layered materials, consisting of alternating layers of zincblende half-metals, by first principles calculations, and find that superlattices of (CrAs){sub 1}(MnAs){sub 1} and (CrAs){sub 2}(MnAs){sub 2} are half-metallic with magnetic moments of 7.0{mu}{sub B} and 14.0{mu}{sub B} per unit cell, respectively. They discuss the nature of the bonding and half-metallicity in these materials and, based on the understanding acquired, develop a simple expression for the magnetic moment in such materials. They explore the range of lattice constants over which half-metallicity is manifested, and suggest corresponding substrates for growth in thin film form.
Date:
November 5, 2003
Creator:
Fong, C Y; Qian, M C; Pask, J; Yang, L H & Dag, S
Object Type:
Article
System:
The UNT Digital Library
ACCUMULATION OF RADIOCESIUM BY MUSHROOMS IN THE ENVIRONMENT: A LITERATURE REVIEW AND IMAGE GALLERY
During the last 50 years, a large amount of information on radionuclide accumulators or 'sentinel-type' organisms in the environment has been published. Much of this work focused on the risks of food-chain transfer of radionuclides to higher organisms such as reindeer and man. However, until the 1980's and 1990's, there has been little published data on the radiocesium ({sup 134}Cs and {sup 137}Cs) accumulation by mushrooms. This presentation will consist of a review of the published data for {sup 134,137}Cs accumulation by mushrooms in nature. The review will consider the time of sampling, sample location characteristics, the radiocesium source term and other aspects that promote {sup 134,137}Cs uptake by mushrooms. This review will focus on published data for mushrooms that demonstrate a large propensity for use in the environmental biomonitoring of radiocesium contamination. It will also provide photographs and descriptions of habitats for many of these mushrooms to facilitate their collection for biomonitoring.
Date:
November 5, 2006
Creator:
Duff, M & Mary Ramsey, M
Object Type:
Article
System:
The UNT Digital Library
UNITED STATES DEPARTMENT OF ENERGY OFFICE OF ENVIRONMENTAL MANAGEMENT WASTE PROCESSING ANNUAL TECHNOLOGY DEVELOPMENT REPORT 2008
The Office of Waste Processing identifies and reduces engineering and technical risks and uncertainties of the waste processing programs and projects of the Department of Energy's Environmental Management (EM) mission through the timely development of solutions to technical issues. The risks, and actions taken to mitigate those risks, are determined through technology readiness assessments, program reviews, technology information exchanges, external technical reviews, technical assistance, and targeted technology development and deployment. The Office of Waste Processing works with other DOE Headquarters offices and project and field organizations to proactively evaluate technical needs, identify multi-site solutions, and improve the technology and engineering associated with project and contract management. Participants in this program are empowered with the authority, resources, and training to implement their defined priorities, roles, and responsibilities. The Office of Waste Processing Multi-Year Program Plan (MYPP) supports the goals and objectives of the U.S. Department of Energy (DOE) - Office of Environmental Management Engineering and Technology Roadmap by providing direction for technology enhancement, development, and demonstration that will lead to a reduction of technical risks and uncertainties in EM waste processing activities. The MYPP summarizes the program areas and the scope of activities within each program area proposed for the next …
Date:
November 5, 2009
Creator:
Bush, S.
Object Type:
Report
System:
The UNT Digital Library
Doing Business with NREL
This presentation, Working With NREL, was given by Casey Porto at the Industry Growth Forum in Golden, Colorado, November 5, 2009.
Date:
November 5, 2009
Creator:
Porto, C.
Object Type:
Presentation
System:
The UNT Digital Library
Seminole Sentinel (Seminole, Tex.), Vol. 98, No. 8, Ed. 1 Sunday, November 5, 2006
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 5, 2006
Creator:
Wright, Dustin
Object Type:
Newspaper
System:
The Portal to Texas History
Rains County Leader (Emory, Tex.), Vol. 115, No. 22, Ed. 1 Tuesday, November 5, 2002
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2002
Creator:
Hill, Earl Clyde, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 94, No. 6, Ed. 1 Sunday, November 5, 2000
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2000
Creator:
Dow, M. Gene & Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Longhorn Express (Harper, Tex.), Vol. 7, No. 2, Ed. 1 Friday, November 5, 2004
Student newspaper of Harper Independent School District in Harper, Texas that includes school news and information along with advertising.
Date:
November 5, 2004
Creator:
Harper Independent School District Journalism Class
Object Type:
Newspaper
System:
The Portal to Texas History
Lexington Observer (Lexington, Okla.), Vol. 14, No. 31, Ed. 1 Thursday, November 5, 2009
Weekly newspaper from Lexington, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 5, 2009
Creator:
McAfee, Shirley
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Polk County Enterprise (Livingston, Tex.), Vol. 124, No. 89, Ed. 1 Sunday, November 5, 2006
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
November 5, 2006
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 127, No. 91, Ed. 1 Thursday, November 5, 2009
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
November 5, 2009
Creator:
Reddell, Valerie
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 109, No. 54, Ed. 1 Friday, November 5, 2004
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2004
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 108, No. 89, Ed. 1 Wednesday, November 5, 2003
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2003
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 113, No. 45, Ed. 1 Wednesday, November 5, 2008
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2008
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Antiferromagnetic exchange bias of a ferromagnetic semiconductor by a ferromagnetic metal
We demonstrate an exchange bias in (Ga,Mn)As induced by antiferromagnetic coupling to a thin overlayer of Fe. Bias fields of up to 240 Oe are observed. Using element-specific x-ray magnetic circular dichroism measurements, we distinguish an interface layer that is strongly pinned antiferromagnetically to the Fe. The interface layer remains polarized at room temperature.
Date:
November 5, 2009
Creator:
Olejnik, K.; Wadley, P.; Haigh, J.; Edmonds, K. W.; Campion, R. P.; Rushforth, A. W. et al.
Object Type:
Article
System:
The UNT Digital Library
Polk County Enterprise (Livingston, Tex.), Vol. 118, No. 87, Ed. 1 Sunday, November 5, 2000
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
November 5, 2000
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 96, No. 7, Ed. 1 Wednesday, November 5, 2003
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 5, 2003
Creator:
Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
Cooper Review (Cooper, Tex.), Vol. 129, No. 44, Ed. 1 Thursday, November 5, 2009
Weekly newspaper from Cooper, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2009
Creator:
Palmer, Roger
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 45, Ed. 1 Thursday, November 5, 2009
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2009
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Improved Miscible Nitrogen Flood Performance Utilizing Advanced Reservoir Characterization and Horizontal Laterals in a Class I Reservoir - East Binger (Marchand) Unit Quarterly Report
Implementation of the work program of Budget Period 2 of the East Binger Unit (''EBU'') DOE Project is progressing and nearing completion. EBU 63-2H has been drilled, completed, and brought on line. This is the second of three horizontal wells planned for this Budget Period, but based on the costs and performances to date of all new wells, could be the last. It will take some time to evaluate their impact on sweep and ultimate recovery. In addition to the drilling of new wells, the project also includes conversions of five wells from producers to injectors. Three wells were previously converted, and a fourth, EBU 37-3H, was prepared for conversion at the end of this reporting period. The fifth will require an expensive workover and will be re-evaluated. Project response to the various projects continues to be very favorable. Gas injection into the pilot area has increased from 4.0 MMscf/d prior to development to an average 7.3 MMscf/d in this reporting period, while gas production has actually decreased from 4.1 MMscf/d to 3.9 MMscf/d. The nitrogen content of produced gas has dropped from 58% to 52%. This has reduced the nitrogen recycle within the pilot area from 60% to 27%. …
Date:
November 5, 2003
Creator:
Sinner, Joe
Object Type:
Report
System:
The UNT Digital Library
Phase III Advanced Anodes and Cathodes Utilized in Energy Efficient Aluminum Production Cells
During Phase I of the present program, Alcoa developed a commercial cell concept that has been estimated to save 30% of the energy required for aluminum smelting. Phase ii involved the construction of a pilot facility and operation of two pilots. Phase iii of the Advanced Anodes and Cathodes Program was aimed at bench experiments to permit the resolution of certain questions to be followed by three pilot cells. All of the milestones related to materials, in particular metal purity, were attained with distinct improvements over work in previous phases of the program. NiO additions to the ceramic phase and Ag additions to the Cu metal phase of the cermet improved corrosion resistance sufficiently that the bench scale pencil anodes met the purity milestones. Some excellent metal purity results have been obtained with anodes of the following composition: Further improvements in anode material composition appear to be dependent on a better understanding of oxide solubilities in molten cryolite. For that reason, work was commissioned with an outside consultant to model the MeO - cryolite systems. That work has led to a better understanding of which oxides can be used to substitute into the NiO-Fe2O3 ceramic phase to stabilize the ferrites …
Date:
November 5, 2001
Creator:
Christini, R.A.; Dawless, R.K.; Ray, S.P. & D.A. Weirauch, Jr.
Object Type:
Report
System:
The UNT Digital Library
Fracture Variability and Hydrologic Implications at Yucca Mountain, Nevada
An understanding of the role of fractures at Yucca Mountain, Nevada, is needed to evaluate the suitability of the site to host a high-level nuclear waste repository. Current infiltration rates at Yucca Mountain require water to move through some fractures in the unsaturated welded units because the matrix porosity and permeability of these units are too small to accommodate the total flow. Though only about 20% of connected fractures are estimated to actively transmit water, flow and transport within fractures can greatly affect repository performance because fractures could be fast pathways for migration of radioactive particles. Under the current design, the potential repository would be located in a densely welded tuff sequence with highly variable fracture characteristics. This variability, resulting largely from the presence of lithophysal cavities, creates heterogeneous flow patterns through the unsaturated zone. Lithophysal cavities interrupt the continuity of fractures they intersect and may locally influence fracture propagation. In welded nonlithophysal zones, fractures tend to be longer and more widely spaced than in lithophysal zones, which generally display a greater number of closely spaced, short-length fractures. Seepage of water into potential waste-emplacement drifts will be affected by the fracture characteristics within the surrounding rock wall. Fractures with sufficient …
Date:
November 5, 2001
Creator:
Hinds, Jenifer
Object Type:
Report
System:
The UNT Digital Library
Assessment of Nonnative Invasive Plants in the DOE Oak Ridge National Environmental Research Park
The Department of Energy (DOE) National Environmental Research Park at Oak Ridge, Tennessee, is composed of second-growth forest stands characteristic of much of the eastern deciduous forest of the Ridge and Valley Province of Tennessee. Human use of natural ecosystems in this region has facilitated the establishment of at least 167 nonnative, invasive plant species on the Research Park. Our objective was to assess the distribution, abundance, impact, and potential for control of the 18 most abundant invasive species on the Research Park. In 2000, field surveys were conducted of 16 management areas on the Research Park (14 Natural Areas, 1 Reference Area, and Walker Branch Watershed) and the Research Park as a whole to acquire qualitative and quantitative data on the distribution and abundance of these taxa. Data from the surveys were used to rank the relative importance of these species using the ''Alien Plant Ranking System, Version 5.1'' developed by the U.S. Geological Survey. Microstegium (Microstegium vimineum) was ranked highest, or most problematic, for the entire Research Park because of its potential impact on natural systems, its tendency to become a management problem, and how difficult it is to control. Microstegium was present in 12 of the 16 …
Date:
November 5, 2002
Creator:
Drake, S. J.
Object Type:
Report
System:
The UNT Digital Library