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Enhanced oil recovery by CO/sub 2/ foam flooding. Annual report, October 1, 1982-September 30, 1983

Description: 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 considered for limited brine applications, for as temperature increases the utility of sulfonates for mobility control also increases. This is encouraging since some of the previously identified additives are chemically unstable at temperatures encountered in most petroleum reservoirs. 113 references, 23 figures, 4 tables.
Date: December 22, 1983
Partner: UNT Libraries Government Documents Department
open access

On Cratering: A Brief History, Analysis, and Theory of Cratering

Description: Cratering is a subject that has been studied by many investigators for many years for many purposes. These purposes range from experimental studies of physical properties to large scale excavations using explosive charges of kiloton size. In the past ten years considerable effort has been devoted to cratering experiments for the purposes of determining the effects of cratering by nuclear explosions, with recent accent on Plowshare applications. From the large amount of data available for craters in alluvian has been possible to establish very reliable relationships between charge size, depth of bursty crater radii, and crater depths. In addition it has been possible to construct a preliminary theory of the mechanics of explosive crater formation. The available experimental data for nuclear and high explosive craters are reviewed, with particular emphasis on the data for desert alluvium, and the pertinent relationships are derived. A theory of the important cratering mechanisms, which has been evolved on the basis of these data and data from other sources, is outlined. (auth)
Date: August 22, 1961
Creator: Nordyke, M. D.
Partner: UNT Libraries Government Documents Department
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EVALUATION OF ULTIMATE DISPOSAL METHOD FOR LIQUID AND SOLID RADIOACTIVE WASTES. PART I. INTERIM LIQUID STORAGE

Description: As the first part of a study to evaluate the economics of the various steps leading to and including the permanent disposal of high-activity liquid and solid radioactive waste, costs of interim liquid storage of acid and alkaline Purex and Thorex wastes were estimated for storage times of 0.5 to 30 years. A 6- ton/day plant was assumed, processing 1500 tons/year of uranium converter fuel at a burnup of 10,000 Mwd/ton and 270 tons/year of thorium converter fuel at a burnup of 20,000 Mwd/ton. Tanks of Savannah River design were assumed, with stainless steel construction for acid wastes and mild steel construction for neutralized wastes. The operating cycle of each tank was assumed to consist of equal filling and emptying periods plus a full (or dead) period. With interim storage time defined as filling time plus full time, tank costs were minimum when full time was 40 to 70% of the interim storage time, using present worth considerations. For waste storage times of 0.5 to 30 years, costs ranged from 2.2 x 10/sup -3/ to 9.5 x 10/sup -3/ mill/kwh/sub e/ for acid wastes and from 1.7 x 10/sup -3/ to 5.1 x 10/sup -3/ mill/kwh/sub e/ for neutralized wastes. (auth)
Date: August 22, 1961
Creator: Bradshaw, R.L.; Perona, J.J.; Roberts, J.T. & Blomeke, J.O.
Partner: UNT Libraries Government Documents Department
open access

Tritium half-life

Description: 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.
Partner: UNT Libraries Government Documents Department
open access

Physics of antimatter-matter reactions for interstellar propulsion

Description: At the stage of the antiproton-nucleon annihilation chain of events relevant to propulsion the annihilation produces energetic charged pions and gamma rays. If annihilation occurs in a complex nucleus, protons, neutrons, and other nuclear fragments are also produced. The charge, number, and energy of the annihilation products are such that annihilation rocket engine concepts involving relatively low specific impulse (I/sub sp/ approx. = 1000 to 2000 s) and very high I/sub sp/ (3 x 10/sup 7/ s) appear feasible and have efficiencies on the order of 50% for annihilation energy to propulsion energy conversion. At I/sub sp/'s of around 15,000 s, however, it may be that only the kinetic energy of the charged nuclear fragments can be utilized for propulsion in engines of ordinary size. An estimate of this kinetic energy was made from known pieces of experimental and theoretical information. Its value is about 10% of the annihilation energy. Control over the mean penetration depth of protons into matter prior to annihilation is necessary so that annihilation occurs in the proper region within the engine. Control is possible by varying the antiproton kinetic energy to obtain a suitable annihilation cross section. The annihilation cross section at low energies is on the order of or larger than atomic areas due to a rearrangement reaction, but it is very low at high energy where its value is closer to nuclear areas.
Date: August 22, 1986
Creator: Morgan, D.L. Jr.
Partner: UNT Libraries Government Documents Department
open access

Only source of energy

Description: Various plants that might play a role in the energy mix of the future are discussed and illustrated. Included among them are the Euphorbias and Guayule. (JGB)
Date: March 22, 1978
Creator: Calvin, G. J. & Calvin, M.
Partner: UNT Libraries Government Documents Department
open access

D/sup -/ production by multiple charge-transfer collisions of low-energy D ions and atoms in cesium vapor

Description: The production of D/sup -/ by multiple charge-transfer collisions of a D/sup +/ beam in a cesium-vapor target is considered for D/sup +/ energies above 300 eV. The cross sections relevant to D/sup -/ formation are obtained by a least-squares fit of three-charge-state differential equations to experimental yield curves. Implications for production of intense negative-ion beams are discussed, and speculations are made about extrapolation to lower engeries.
Date: January 22, 1978
Creator: Hooper, E. B. Jr.; Willmann, P. A. & Schlachter, A. S.
Partner: UNT Libraries Government Documents Department
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Enhancing the use of coals by gas reburning-sorbent injection

Description: 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
Partner: UNT Libraries Government Documents Department
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Evaluation of Wire Scanner for SM-1

Description: Preliminary design concepts are presented for a wire scanner for experimentally evaluating spatial variations of neutron flux in the SM-l reactor core. Results of a literature search and determination of optimum criteria for flux mapping the core in minimum time dictated requirements for design concepts and specifications. The utility of both manually instrumented and automatically instrumented wire scanners was analyzed with respect to rapidity of measurement, selectivity of detector location, cost, value of data, plant downtime, and additional factors. (auth)
Date: November 22, 1961
Creator: Kemp, S. N.
Partner: UNT Libraries Government Documents Department
open access

Effects of low-temperature fusion neutron irradiation on critical properties of a monofilament niobium-tin superconductor

Description: The objective of this work was to irradiate a Nb/sub 3/Sn superconductor with 14.8 MeV neutrons at 4 K and measure critical current in transverse fields of up to 12 T, irradiating up to a fluence sufficient to decrease the critical current to below its initial value. Critical temperatures were also to be measured. The samples were to be kept near 4 K between the irradiation and the measurement of critical properties. This work is directed toward establishing an engineering design fluence limit for Nb/sub 3/Sn when used in fusion reactor superconducting magnets.
Date: March 22, 1984
Creator: Guinan, M.W.; Van Konynenburg, R.A. & Mitchell, J.B.
Partner: UNT Libraries Government Documents Department
open access

Effects of Seismic Vibrations on the Experimental Gas-Cooled Reactor

Description: The effects of seismic vibrations on the dynamic behavior of a composite system were analyzed. The equations of motion were derived and soIved with special emphasis on determining the resulting stresses. The method of analysis thus developed was applied to the composite structure consisting of the core, pressure vessel, and supporting skirt of the Experimental Gas-Cooled Reactor (EGCR). A system with three degrees of freedom was considered in order to determine the effects of an earthquake of the maximum intensity expected in the area surrounding Oak Ridge, Tennessee. The system of equations of motion was solved both numerically and analytically, and the resonant frequencies were determined. The seismic effect was shown to be small when the frequency of the seismic disturbance coincided with a natural frequency of the system. In particular, the shear stresses in the graphite core were shown to be negligible. (auth)
Date: June 22, 1962
Creator: Witt, F.J.; Carver, D.R. & Maxwell, R.L.
Partner: UNT Libraries Government Documents Department
open access

Studies of Plasma Transport

Description: This report discusses the charge-coupled device camera and other plasma diagnostic equipment used to measure plasma density and other plasma properties. (LSP)
Date: July 22, 1991
Creator: Malmberg, J. H.; O'Neil, T. M. & Driscoll, C. F.
Partner: UNT Libraries Government Documents Department
open access

Political Parties in the Philippines

Description: This report discusses the two-party stem of the Philippines republic; NP and LP party structure, Np and LP party programs, its strength and discusses U.S - Philippine relations.
Date: April 22, 1968
Creator: Colwell, Carolyn K.
Partner: UNT Libraries Government Documents Department

[Banner from Proof exhibit]

Description: Photograph of one of the informational banners that was hung in the Special Collections room while the exhibit "Proof: The Byrd Williams Family Photography Archive" was housed there. It reads "Byrd Williams Photography; Byrd Photo; Byrd Williams III worked for Kodak and several other photography companies in addition to being involved in lens manufacturing prior to starting his business in Fort Worth. Through these jobs he gained the skill necessary to launch Byrd Photo which also included a portrait studio and photo lab. Studio work included work for a wide variety of clients including the city crime lab, architects, and magazines. Customers could have a photography painted over in oils, giving it the appearance of a painting - or oil paintings, based on these photographs.; Proof: Photographs from Four Generations of a Texas Family; Customers who came to Byrd Photo to have their portrait made would invariably be presented with a proof -- a photo print they could see before they placed their order for additional photographs. The Williams Collection is filled with photo proofs like these, but it's filled with proof of another kind as well-- proof of four lives spent in an unceasing attempt to capture our world, through the lens of a camera, as well as through the artifacts of their own lives. Over 190 images from the collection, as well as letters and other family mementos, are curated by Byrd Williams IV in the book Proof, available in fall 2016 through UNT Press." On the banner are also three black and white images, and a picture of a camera and old film.
Date: November 22, 2016
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections

[Display case at Proof exhibit]

Description: Photograph of a display case with various forms of photography set up inside. The case was a part of the "Proof: The Byrd Williams Family Photography Archive" exhibit, which was housed in the Special Collections room in Willis Library during the Fall 2016 Semester.
Date: November 22, 2016
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections

[Informative banner from Proof exhibit]

Description: Photograph of an informational banner hung on the wall during the "Proof: The Byrd Williams Family Photography Archive" exhibit. It was housed in the Special Collections room at Willis Library during the fall semester of 2016. The banner reads "Introduction; An archive is a story which hasn't been written. Within each box and folder are photos, letters, scrapbooks and artifacts. Individually they are curiosities, but combined, they are interconnected evidence of the past. The Byrd Williams Family Photography Collection was created by four photographers, all named Byrd Moore Williams, over four successive generations beginning in 1890 and continuing through the present day. The collection is proof of four lives, lived in vivid detail. The story is yet to be told.; The archive, acquired by UNT Libraries in 2014, contains over 300,000 unique images, ranging from snapshots to studio portraits to street photography. Subject matter is diverse too; in this collection the landscapes of Yosemite site alongside televangelists, professional hockey players and Fort Worth city landmarks new and old. The history of the Williams Family is told within the collection through letters, postcards, diaries and artifacts such as cameras and significant personal effects." Also on the banner are several examples of photos found in the archive collection.
Date: November 22, 2016
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections

[Byrd Williams Timeline Banner displayed at exhibit]

Description: Photograph of a banner displayed at the "Proof: The Byrd Williams Family Photography Archive". On it are images of each Byrd Williams next to names and a synopsis of their life. The banner reads "Byrd Williams Timeline; Byrd Moore Williams; Byrd Moore Williams owned a hardware store in Gainesville, Texas that sold photography equipment. His early prints were developed in a darkroom in the family's home. His work includes stunningly detailed images of his hardware store, photos of family members and places around Gainesville.; Byrd Moore Williams, Jr.; Byrd Williams II studied at the University of Texas (1905-1907), worked as an engineer, and expanded on family tradition by incorporating imagery in forms other than portraiture, which included landscapes and city scenery. His work includes documentation of civil engineering projects including the San Antonio River Walk. Byrd II's surveying equipment and notebooks are included in the collection as well as fragile nitrate based negatives featuring early scenes of Yosemite National Park.; Byrd Williams III; Byrd Williams III explored photography on his own terms as a fine art as well as a commercial enterprise. He owned a photo service in Fort Worth and in the 1930s created an expansive series of women at work. Through his images, he documented street scenes and the people of Fort Worth, which was developing rapidly in the mid-20th century. With the work of Byrd Williams III, we see photography develop into a unique way of making a personal statement.; Byrd Williams IV; Byrd Williams IV is a prolific exhibiting photographer, who has shown in the United States and abroad. His work is situated in our modern world, however it has significant historical weight. Although three previous generations of photographers are in his DNA, his vision is uniquely his own: humane, curious and full of life. Byrd …
Date: November 22, 2016
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections
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