Resource Type
Partner
Oklahoma Historical Society
101
Rice University Woodson Research Center
55
UNT Libraries Government Documents Department
55
Hardin-Simmons University Library
33
Howard Payne University Library
27
UNT Libraries
26
McMurry University Library
16
Sterling Municipal Library
9
Abilene Christian University Library
6
University of Texas at El Paso
6
39 More
Collection
Texas Digital Newspaper Program
240
Oklahoma Digital Newspaper Program
101
Abilene Library Consortium
91
The Rice Thresher
55
Office of Scientific & Technical Information Technical Reports
48
The Brand (Abilene, TX)
30
Tocker Foundation Grant
27
The Yellow Jacket
26
The War Whoop
16
The Baytown Sun
9
99 More
Degree Department
Country
Decade
Month
Language
401 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Results:
1 - 24 of
401
next
Automatic Silt And Sand Separator.
Patent for an automatic silt and sand separator that settles and discharges sand, slimes and any foreign matters.
Date:
March 15, 1904
Creator:
Allen, Charles
Object Type:
Patent
System:
The Portal to Texas History
Optimization of Comminution Circuit Throughput and Product Size Distribution by Simulation and Control
The goal of this project is to improve energy efficiency of industrial crushing and grinding operations (comminution). Mathematical models of the comminution process are being used to study methods for optimizing the product size distribution, so that the amount of excessively fine material produced can be minimized. The goal is to save energy by reducing the amount of material that is ground below the target size, while simultaneously reducing the quantity of materials wasted as ''slimes'' that are too fine to be useful. This is being accomplished by mathematical modeling of the grinding circuits to determine how to correct this problem. The approaches taken included (1) Modeling of the circuit to determine process bottlenecks that restrict flow rates in one area while forcing other parts of the circuit to overgrind the material; (2) Modeling of hydrocyclones to determine the mechanisms responsible for retaining fine, high-density particles in the circuit until they are overground, and improving existing models to accurately account for this behavior; and (3) Evaluation of advanced technologies to improve comminution efficiency and produce sharper product size distributions with less overgrinding.
Date:
March 31, 2005
Creator:
Kawatra, S. K.; Eisele, T. C.; Weldum, T.; Larsen, D.; Mariani, R. & Pletka, J.
Object Type:
Report
System:
The UNT Digital Library
Radiological survey of the inactive uranium-mill tailings at Green River, Utah
The uranium-mill tailings at Green River, Utah, are relatively low in /sup 226/Ra content and concentration (20 Ci and 140 pCi/g, respectively) because the mill was used to upgrade the uranium ore by separating the sand and slime fractions; most of the radium was transported along with the slimes to another mill site. Spread of tailings was observed in all directions, but near-background gamma exposure rates were reached at distances of 40 to 90 m from the edge of the pile. Water erosion of the tailings is evident and, since a significant fraction of the tailings pile lies in Brown's Wash, the potential exists for repetition of the loss of a large quantity of tailings such as occurred during a flood in 1959. In general, the level of surface contamination was low at this site, but some areas in the mill site, which were being used for nonuranium work, have gamma-ray exposure rates up to 143 ..mu..R/hr.
Date:
March 1, 1980
Creator:
Haywood, F. F.; Christian, D. J.; Ellis, B. S.; Hubbard Jr., H. M.; Lorenzo, D. & Shinpaugh, W. H.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of the cover cracking potential due to ground subsidence at UMTRA Project disposal cells
The US Department of Energy`s Uranium Mill Tailings Remedial Action (UMTRA) Project requires that mill tailings, containing low-level radioactive uranium mill tailings and other waste, be stabilized and controlled by placement in an encapsulated disposal cell. The cover of the cell is a multi-layer system which includes a low-permeability earthen radon/infiltration barrier, a bedding layer, and a erosion protection layer. The radon/infiltration barrier is designed to limit the radon flux and reduce water infiltration. The performance criteria established by the US Environmental Protection Agency in 40 CFR 192 require the cover to be effective for up to 1000 years to the extent reasonably achievable, and in any case, for at least 200 years. One concern that would affect the integrity of the radon/infiltration barrier is the potential for cracking due to the post-construction settlement of underlying compressible materials. To investigate the potential of cover cracking for UMTRA disposal cells, a simplified beam analysis is used to determine the horizontal movements and strains due to the differential settlements at the top surface of a relatively incompressible layer (e.g. radon/infiltration barrier and compacted tailings). The potential of cover cracking is then evaluated by comparing the calculated horizontal tensile strains with the strains …
Date:
March 1, 1994
Creator:
Claire, R. F.; Kuo, J. C. & Wanket, D. R.
Object Type:
Article
System:
The UNT Digital Library
LIFE CYCLE INVENTORY ANALYSIS IN THE PRODUCTION OF METALS USED IN PHOTOVOLTAICS.
Material flows and emissions in all the stages of production of zinc, copper, aluminum, cadmium, indium, germanium, gallium, selenium, tellurium, and molybdenum were investigated. These metals are used selectively in the manufacture of solar cells, and emission and energy factors in their production are used in the Life Cycle Analysis (LCA) of photovoltaics. Significant changes have occurred in the production and associated emissions for these metals over the last 10 years, which are not described in the LCA databases. Furthermore, emission and energy factors for several of the by-products of the base metal production were lacking. This report aims in updating the life-cycle inventories associated with the production of the base metals (Zn, Cu, Al, Mo) and in defining the emission and energy allocations for the minor metals (Cd, In, Ge, Se, Te and Ga) used in photovoltaics.
Date:
March 30, 2007
Creator:
Fthenakis, V. M.; Kim, H. C. & Wang, W.
Object Type:
Report
System:
The UNT Digital Library
The Thresher (Houston, Tex.), Vol. 28, No. 20, Ed. 1 Friday, March 5, 1943
A weekly student newspaper from the Rice Institute in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
March 5, 1943
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The War Whoop (Abilene, Tex.), Vol. 33, No. 20, Ed. 1, Friday, March 23, 1956
Weekly student newspaper from McMurry College in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
March 23, 1956
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Asphalt Emulsion Radon Barrier Systems for Uranium Mill Tailings: An Overview of the Technology
Pacific Northwest Laboratory (PNL), under contract to the US Department of Energy (DOE) Uranium Mill Tailings Remedial Action Project (UMTRAP) office, has developed an asphalt emulsion cover system to reduce the release of radon from uranium mill tailings. The system has been field tested at Grand Junction, Colorado. Results from laboratory and field tests indicate that this system is effective in reducing radon release to near-background levels (<2.5 pCi m/sup -2/s/sup -1/) and has the properties required for long-term effectiveness and stability. Engineering specifications have been developed, and analysis indicates that asphalt emulsion covers are cost-competitive with other cover systems. This report summarizes the technology for asphalt emulsion radon barrier systems. 59 references, 45 figures, 36 tables.
Date:
March 1, 1984
Creator:
Baker, E.G.; Hartley, J.N.; Freeman, H.D.; Gates, T.E.; Nelson, D.A. & Dunning, R.L.
Object Type:
Report
System:
The UNT Digital Library
The Simmons Brand (Abilene, Tex.), Vol. 8, No. 22, Ed. 1, Saturday, March 1, 1924
Weekly student newspaper from Simmons College in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
March 1, 1924
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Simmons Brand (Abilene, Tex.), Vol. 8, No. 24, Ed. 1, Saturday, March 15, 1924
Weekly student newspaper from Simmons College in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
March 15, 1924
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 46, No. 109, Ed. 1 Wednesday, March 6, 1963
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 6, 1963
Creator:
Fenwick, Babs
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Automatic Ore And Slime Separator
Patent for a automatic ore and slime separator. This invention is designed to separate the sand and other solid particles from water. Illustration included.
Date:
March 15, 1904
Creator:
Allen, Charles
Object Type:
Patent
System:
The Portal to Texas History
McMurry War Whoop (Abilene, Tex.), Vol. 18, No. 23, Ed. 1, Saturday, March 29, 1941
Weekly student newspaper from McMurry College in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
March 29, 1941
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Thresher (Houston, Tex.), Vol. 34, No. 20, Ed. 1 Thursday, March 27, 1947
A weekly student newspaper from the Rice Institute in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
March 27, 1947
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. A summary of the Phase II, Title I
Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals residing nearby, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the tailings on the site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The sparse population and relatively low radiation levels yield minimal immediate environmental impact; hence, the two alternative actions presented are directed towards restricting access to the site (Options I and II), and returning the windblown tailings to the pile and stabilizing the pile with 2 ft of cover material (Option II). Both options include remedial action costs for offsite locations where tailings have been placed. Cost estimates for the two options are $585,000 and $1,165,000. Reprocessing the tailings for uranium is not economically feasible.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Rice Thresher (Houston, Tex.), Vol. 74, No. 23, Ed. 1 Friday, March 13, 1987
A weekly student newspaper from the Rice University in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
March 13, 1987
Creator:
Greene, Spencer
Object Type:
Newspaper
System:
The Portal to Texas History
Yellow Jacket (Brownwood, Tex.), Vol. 3, No. 23, Ed. 1, Thursday, March 4, 1926
Weekly student newspaper from Howard Payne College in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 4, 1926
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Engineering Solutions to the Long-Term Stabilization and Isolation of Uranium Mill Tailings in the United States
Engineering solutions to the safe and environmentally protective disposal and isolation of uranium mill tailings in the US include many factors. Cover design, materials selection, civil engineering, erosive forces, and cost effectiveness are only a few of those factors described in this paper. The systems approach to the engineering solutions employed in the US is described, with emphasis on the standards prescribed for the Uranium Mill Tailings Remedial Action Project. Stabilization and isolation of the tailings from humans and the environment are the primary goals of the US uranium mill tailings control standards. The performance of cover designs with respect to water infiltration, radon exhalation, geotechnical stability, erosion protection, human and animal intrusion prevention, and longevity are addressed. The need for and frequency of surveillance efforts to ensure continued disposal system performance are also assessed.
Date:
March 1, 1995
Creator:
Sanders, Donald R. & Lommler, John C.
Object Type:
Report
System:
The UNT Digital Library
Yellow Jacket (Brownwood, Tex.), Vol. 17, No. 13, Ed. 1, Tuesday, March 17, 1931
Weekly student newspaper from Howard Payne College in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 17, 1931
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Engineering assessment of inactive uranium mill tailings, Shiprock site, Shiprock, New Mexico. Phase II, Title I
Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Shiprock, New Mexico. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the 1.7 million tons of tailings at the Shiprock site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The 11 alternative actions presented range from completion of the present ongoing EPA site decontamination plan (Option I), to stabilizing in-place with varying depths of cover material (Options II-IV), to removal to an isolated long-term disposal site (Options V-XI). All options include remedial action costs for off-site locations where tailings have been placed. Costs estimates for the 11 options range from $540,000 to $12,500,000. Reprocessing the tailings for uranium is not economically feasible.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Thresher (Houston, Tex.), Vol. 34, No. 19, Ed. 1 Thursday, March 20, 1947
A weekly student newspaper from the Rice Institute in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
March 20, 1947
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Phase II, Title I engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. [Environmental effects, health hazards, and options for stabilization of tailings or fencing of site]
An engineering assessment was made of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals residing nearby, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the tailings on the site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The sparse population and relatively low radiation levels yield minimal immediate environmental impact; hence, the two alternative actions presented are directed towards restricting access to the site and returning the windblown tailings to the pile and stabilizing the pile. Both options include remedial action costs for offsite locations where tailings have been placed. Cost estimates for the two options are $585,000 and $1,165,000.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Thresher (Houston, Tex.), Vol. 14, No. 20, Ed. 1 Friday, March 8, 1929
A weekly student newspaper from the Rice Institute in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
March 8, 1929
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Yellow Jacket (Brownwood, Tex.), Vol. 25, No. 24, Ed. 1, Thursday, March 23, 1939
Weekly student newspaper from Howard Payne College in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 23, 1939
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History