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5,763 Matching Results
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Enhanced oil recovery by CO/sub 2/ foam flooding. Annual report, October 1, 1982-September 30, 1983
The objective is to identify commercially available additives which are effective in reducing the mobility of carbon dioxide, CO/sub 2/, thereby improving its efficiency in the recovery of tertiary oil, and which are low enough in cost to be economically attractive. During the past year significant progress has been made in developing a commercial method of reducing the mobility of carbon dioxide in enhanced oil recovery processes. Four basic chemical structures, listed below, appear to show most promise for gas mobility control: (1) ethoxylated adducts of C/sub 8/ - C/sub 14/ linear alcohols; (2) sulfate esters of ethoxylated C/sub 9/ - C/sub 16/ linear alcohols; (3) low molecular weight co-polymers of ethylene oxide and propylene oxide; and (4) synthetic organic sulfonates. With the exception of the sulfonates, the above types are compatible with normal oil field brines, unaffected by the presence of crude oil and stable under conditions common in a petroleum reservoir. The second significant result during the year involves identification of several sulfonate structures that have high potential for mobility control for carbon dioxide. Commercial sulfonate additives are available that appear optimum for reservoirs where freshwater will be used to inject the surfactant solution. They can also be …
Date:
December 22, 1983
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Tritium half-life
Least squares analyses of calorimetric measurements made at Mound Laboratory on two tritide compounds over a period of 18 y were performed to determine the half-life of tritium. A half-life of 12.3232 +- 0.0043 mean solar years was obtained.
Date:
December 22, 1977
Creator:
Rudy, C. R. & Jordan, K. C.
Object Type:
Report
System:
The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection
The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on three coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices; tangential, wall, and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by overfire air addition. SO{sub x} emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace, at the superheater exit or into the ducting following the air heater. The sorbents trap SO{sub x} as solid sulfates and sulfites, which are collected in the particulate control device.
Date:
December 22, 1988
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[News Script: Hospital]
Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date:
December 22, 1968
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: Tahoka fire]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a broadcast news story.
Date:
December 22, 1968
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
Effects of a hypothetical loss-of-coolant accident on a Mark I Boiling Water Reactor pressure-suppression system
A loss-of-coolant accident (LOCA) in a boiling-water-reactor (BWR) power plant has never occurred. However, because this type of accident could be particularly severe, it is used as a principal theoretical basis for design. A series of consistent, versatile, and accurate air-water tests that simulate LOCA conditions has been completed on a /sup 1///sub 5/-scale Mark I BWR pressure-suppression system. Results from these tests are used to quantify the vertical-loading function and to study the associated fluid dynamics phenomena. Detailed histories of vertical loads on the wetwell are shown. In particular, variation of hydrodynamic-generated vertical loads with changes in drywell-pressurization rate, downcomer submergence, and the vent-line loss coefficient are established. Initial drywell overpressure, which partially preclears the downcomers of water, substantially reduces the peak vertical loads. Scaling relationships, developed from dimensional analysis and verified by bench-top experiments, allow the /sup 1///sub 5/-scale results to be applied to a full-scale BWR power plant. This analysis leads to dimensionless groupings that are invariant. These groupings show that, if water is used as the working fluid, the magnitude of the forces in a scaled facility is reduced by the cube of the scale factor and occurs in a time reduced by the square root …
Date:
December 22, 1977
Creator:
Pitts, J.H. & McCauley, E.W.
Object Type:
Article
System:
The UNT Digital Library
EXPERIMENTAL ATTEMPTS TO STABILIZE A CUBIC FORM OF BeO
Binary mixtures of BeO with the oxides Al/sub 2/O/sub 3/, CaO, Li/sub 2/ O, MgO, Sc/sub 2/O/sub 3/, TiO/sub 2/, Y/sub 2/O/sub 3/, and ZrO/sub 2/ were fired to temperatures in excess of 2050 deg C in an attempt to produce a stabilized cubic crystalline modification of BeO. No evidence was observed in microscopic and x-ray diffraction analyses of the cooled specimens that a cubic form of BeO had formed in the experiment. (auth)
Date:
December 22, 1961
Creator:
Thoma, R.E.; Friedman, H.A. & McVay, T.N.
Object Type:
Report
System:
The UNT Digital Library
Studies of encapsulant materials for terrestrial solar-cell arrays. First quarterly progress report, October 9--December 9, 1975
Study 1 of this contract is entitled ''Evaluation of World Experience and Properties of Materials for Encapsulation of Terrestrial Solar-Cell Arrays.'' The approach of this study is to review and analyze world experience and to compile data on properties of encapsulants for photovoltaic cells and for related applications. The objective of the effort is to recommend candidate materials and processes for encapsulating terrestrial photovoltaic arrays at low cost for a service life greater than 20 years. The objectives of Study 2, ''Definition of Encapsulant Service Environments and Test Conditions,'' are to develop the climatic/environmental data required to define the frequency and duration of detrimental environmental conditions in a 20-year array lifetime and to develop a corresponding test schedule for encapsulant systems. (WDM)
Date:
December 22, 1975
Creator:
Carmichael, D.C. (comp.)
Object Type:
Report
System:
The UNT Digital Library
MARITIME GAS-COOLED REACTOR PROGRAM. A REVIEW OF THE MARITIME GAS-COOLED REACTOR PROGRAM
Presented at the Eleventh Professional Divisions Conference of the San Francisco Section of the American Society of Mechanical Engineers, Noveraber l6, l96l. The MGCR program and its objectives are discussed. The basic MGCR plant is described. The design of the Experimental Beryllium Oxide Reactor is also described. (M.C.G.)
Date:
December 22, 1961
Creator:
Trickett, K.A.
Object Type:
Report
System:
The UNT Digital Library
Heavy quark production in ep collisions at HERA. [None]
There are substantial production rates of heavy quarks from ep collisions at HERA. The center of mass energy of about 300 GeV is well above any b-quark threshold effects, and for b/bar b/ production, the cross section is estimated to be 3.3 nb per event, leading to rates approaching 10/sup 6/ b mesons per year. The rates for c/bar c/ production are about two orders of magnitude greater. Two major detectors are under construction and a program of heavy quark physics will start in 1990. 3 refs., 4 figs.
Date:
December 22, 1987
Creator:
Derrick, M.
Object Type:
Article
System:
The UNT Digital Library
Oklahoma State Register. (Guthrie, Okla.), Vol. 13, No. 51, Ed. 1 Thursday, December 22, 1904
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
December 22, 1904
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 23, No. 26, Ed. 1 Thursday, December 22, 1910
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1910
Creator:
LeCompte, W. R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 4, No. 40, Ed. 1 Thursday, December 22, 1910
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1910
Creator:
Ruthruff, C. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guthrie Daily Star (Guthrie, Okla.), Vol. 9, No. 244, Ed. 1 Sunday, December 22, 1912
Daily newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1912
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cushing Independent. (Cushing, Okla.), Vol. 10, No. 3, Ed. 1 Thursday, December 22, 1910
Weekly newspaper from Cushing, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1910
Creator:
Holland, Al. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Willow Times (Willow, Okla.), Vol. 1, No. 34, Ed. 1 Friday, December 22, 1916
Weekly newspaper from Willow, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1916
Creator:
Roper, Ira T.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 7, No. 13, Ed. 1 Friday, December 22, 1911
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1911
Creator:
Barrow, A. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 20, No. 41, Ed. 1 Thursday, December 22, 1910
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1910
Creator:
Zimmerman, Warren
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 31, No. 43, Ed. 1 Thursday, December 22, 1921
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1921
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Canadian Valley News. (Canadian, Oklahoma), Vol. 2, No. 6, Ed. 1 Friday, December 22, 1911
Weekly newspaper from Canadian, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1911
Creator:
Tignor, J. D.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Sentinel Leader. (Sentinel, Okla.), Vol. 8, No. 21, Ed. 1 Friday, December 22, 1911
Weekly newspaper from Sentinel, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1911
Creator:
Inglish, G. L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Tyrone Observer. (Tyrone, Okla.), Vol. 7, No. 29, Ed. 1 Thursday, December 22, 1910
Weekly newspaper from Tyrone, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1910
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Woods County News. (Carmen, Okla.), Vol. 7, No. 2, Ed. 1 Thursday, December 22, 1904
Weekly newspaper from Carmen, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
December 22, 1904
Creator:
Watrus, P. B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Logan County News. (Crescent, Okla.), Vol. 9, No. 6, Ed. 1 Friday, December 22, 1911
Weekly newspaper from Crescent, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 22, 1911
Creator:
Wnorowski, B. F.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History