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3,421 Matching Results
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3,409 - 3,421 of
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A Hybrid Hydrologic-Geophysical Inverse Technique for the Assessment and Monitoring of Leachates in the Vadose Zone
The objective of this study is to develop and field test a new, integrated Hybrid Hydrologic- Geophysical Inverse Technique (HHGIT) for characterization of the vadose zone at contaminated sites. This new approach to site characterization and monitoring can provide detailed maps of hydrogeologic heterogeneity and the extent of contamination by combining information from 3D electric resistivity tomography (ERT) and/or 2D cross-borehole ground penetrating radar (XBGPR) surveys, statistical information about heterogeneity and hydrologic processes, and sparse hydrologic data. Because the electrical conductivity and dielectric constant of the vadose zone (from the ERT and XBGPR measurements, respectively) can be correlated to the fluid saturation and/or contaminant concentration, the hydrologic and geophysical measurements are related.
Date:
June 1, 2000
Creator:
Alumbaugh, David L.; Yeh, Jim; LaBrecque, Doug & Glass, Robert J.
Object Type:
Report
System:
The UNT Digital Library
Influence Of Radiation And Multivalent Cation Additions On Phase Separation And Crystallization Of Glass
The major objectives of this proposed investigation are as follows: (1) To investigate the influence of multivalent cations on the thermodynamics and kinetics of phase separation and crystallization in simple model glasses. (2) To study the influence of a and b particle, heavy ion bombardment and g irradiation on phase separation and crystallization in simple model glasses. (3) To examine the structural changes produced by radiation just prior to the onset of phase separation and/or crystallization. (4) To develop models to explain the observed effects of multivalent cations and radiation on phase separation and crystallization. (5) To utilize the results of these experimental and modeling studies to provide guidelines for the allowed range of composition choices and processing conditions in order to avoid the formation of unwanted phases in nuclear waste disposal glasses.
Date:
June 1, 2000
Creator:
Weinberg, Michael C.; Uhlmann, Donald R. & Smith, Gary L.
Object Type:
Report
System:
The UNT Digital Library
Coupling Sorption to Soil Weathering during Reactive Transport: Impacts of Mineral Transformation and Sorbate Aging on Contaminant Speciation and Mobility
The Hanford subsurface has become contaminated with highly alkaline, radioactive waste generated as a result of weapons production. The radioactive brine was stored in underground storage tanks, a number of which developed leaks and contaminated the surrounding subsurface. The high pH and ionic strength of these wastes has been predicted to accelerate the degree of soil weathering to produce new mineral phases--cancrinite and sodalite among the most abundant. Previous work has demonstrated that Cs and Sr, which along with I represent the most radioactive components in the waste, are sequestered by these neo-formed solids. The present work is aimed at assessing the stability of these neo-formed solids, with special emphasis on the degree of Cs, Sr and I release under ambient (neutral pH, low ionic strength) conditions expected to return to the Hanford area after the caustic radioactive brine waste is removed.
Date:
June 1, 2006
Creator:
Steefel, Carl I.; Thompson, Aaron & Chorover, Jon
Object Type:
Report
System:
The UNT Digital Library
Transcription: Monologue about courage and elders' wisdom
This is a monologue about the teachings of elders. He warns that people need to think carefully before judging. The speaker, Vshaq Sangdong Pōng, is from the Mvtjùng valley, and is about 70 years old at the time of recording. He speaks the lower Mvtjùng variety.
Date:
June 1, 2006
Creator:
LaPolla, Randy
Object Type:
Text
System:
The UNT Digital Library
Transcription: Description of the mountains in the area
This is a description of the mountains near Dukdang, Putao, and others in surrounding areas. The speaker, Vshaq Sangdong Pōng, is from the Mvtjùng valley, and is about 70 years old at the time of recording. He speaks the lower Mvtjùng variety. He lists the mountains, and the groups that live in those areas. He tells which mountains have roads nearby, and how some have changed names over time.
Date:
June 1, 2006
Creator:
LaPolla, Randy
Object Type:
Text
System:
The UNT Digital Library
Transcription: Description of rivers and streams in the area
This is a description of the rivers and streams near Dukdang, Putao, and others in surrounding areas. The speaker, Vshaq Sangdong Pōng, is from the Mvtjùng valley, and is about 70 years old at the time of recording. He speaks the lower Mvtjùng variety. He lists the names of different rivers, and describes where they meet, and what roads or villages are near them.
Date:
June 1, 2006
Creator:
LaPolla, Randy
Object Type:
Text
System:
The UNT Digital Library
Transcription: Traditional narrative about the orphan boy and the treasure
This is a traditional narrative about an orphan boy who finds treasure inside a gourd and becomes rich. The speaker, Vshaq Sangdong Pōng, is from the Mvtjùng valley, and is about 70 years old at the time of recording.
Date:
June 1, 2006
Creator:
LaPolla, Randy
Object Type:
Text
System:
The UNT Digital Library
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, June 1, 2001
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
June 1, 2001
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Mercedes Enterprise (Mercedes, Tex.), Vol. 93, No. 22, Ed. 1 Wednesday, June 1, 2005
Weekly newspaper from Mercedes, Texas that includes local, state, and national news along with advertising.
Date:
June 1, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 98, No. 44, Ed. 1 Tuesday, June 1, 2004
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
June 1, 2004
Creator:
Cartwright, Brian & Morgan, Clay
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Tuesday, June 1, 2004
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
June 1, 2004
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 109, No. 46, Ed. 1 Wednesday, June 1, 2005
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 1, 2005
Creator:
Bridges, G. Frank & Bridges, Georgie
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 101, No. 44, Ed. 1 Friday, June 1, 2007
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
June 1, 2007
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History