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captions transcript

[News Clip: Type]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about John McCready, a graduate student at Texas Christian University, who has developed a typewriter that will allow a child with cerebral palsy to communicate. In this story, McCready discusses the machine's design.
Date: June 17, 1964
Duration: 4 minutes 08 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Murder trial]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about the first day of testimony in the murder trial of Clarence Bearden who is accused of shooting his wife Wanda Bearden.
Date: June 17, 1964
Duration: 1 minute 29 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Plane]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about a ceremony for the new Ling-Temco-Vought (LTV) aircraft, the XC-1-42-A. The story includes footage of Marines emerging from the plane's cargo space.
Date: June 17, 1964
Duration: 2 minutes 11 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Miss FBE]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about North Texas State University student Sandra Anders being named Miss Future Business Executive of America.
Date: June 17, 1964
Duration: 1 minute 12 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Triplets]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about a Dallas mother who gave birth to triplets at Parkland Hospital.
Date: June 17, 1964
Duration: 1 minute 06 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Saddle]

Description: Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about Floyd Drusch of Ryon Saddle and Supply Store creating a saddle that will be a gift from the Texas Livestock Association to Lyndon B. Johnson. The story includes an interview with Drusch about the saddle design, including lady birds to honor the First Lady.
Date: June 17, 1964
Duration: 1 minute 54 seconds
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
open access

Potassium terbium fluoride crystal growth development for faraday rotator discs fabrication, 6 July 1978--6 February 1979

Description: Crystal growth experiments were performed and growth of KTb/sub 3/F/sub 10/ crystals were accomplished. The crystal growth experiments consisted of hot zone modification and development of growth parameters. Several boules of KTb/sub 3/F/sub 10/ 30 to 40mm in diameter and one boule 50mm in diameter were grown at rates varying from .5mm/hr to 3.0mm/hr. The crystals evaluated display excellent optical quality. The optical path distortion was less than 0.5 fringe/cm at 633nm as viewed in Twyman--Green interferometry. Growth of large crystals has been limited by mechanical cleavage.
Date: May 17, 1979
Partner: UNT Libraries Government Documents Department
open access

EPRI geothermal energy R and D 5-year program plan (1975 to 1979)

Description: The recommended EPRI Geothermal Research and Development 5-Year Program Plan has been defined to complement and provide focus for federally sponsored geothermal energy R and D efforts. The scope of the program includes: verification of hydrothermal reservoir capability and low salinity brine heat transfer characteristics at a potential demonstration site followed by design, development and construction of a low salinity hydrothermal demonstration plant in conjunction with an electric utility or utility consortium. Development of a comprehensive set of Guidelines Manuals for use by utility management and engineers spanning the full range of geothermal resource utilization from exploration through plant startup, including not only technical, but environmental, institutional and regulatory factors. A subprogram to define the potential and requirements for Geothermal Systems. A supporting research and technology subprogram oriented toward minimizing the risk associated with utilization of low and high salinity hydrothermal sources. An Advanced Research and Technology subprogram to assess the potential of geopressure resources in conjunction with the Federal government and limited R and D on advanced concepts for utilization of hydrothermal fluids. (MHR)
Date: October 17, 1974
Creator: Spencer, D.F.
Partner: UNT Libraries Government Documents Department
open access

Nonrelativistic theory of heavy-ion collisions

Description: A wide range of phenomena is observed in heavy-ion collisions, calling for a comprehensive theory based on fundamental principles of many-particle quantum mechanics. At low energies, the nuclear dynamics is controlled by the mean field, as we know from spectroscopic nuclear physics. We therefore expect the comprehensive theory of collisions to contain mean-field theory at low energies. The mean-field theory is the subject of the first lectures in this chapter. This theory can be studied quantum mechanically, in which form it is called TDHF (time-dependent Hartree-Fock), or classically, where the equation is called the Vlasov equation. 25 references, 14 figures.
Date: July 17, 1984
Creator: Bertsch, G.
Partner: UNT Libraries Government Documents Department
open access

Advances in ICF power reactor design

Description: Fifteen ICF power reactor design studies published since 1980 are reviewed to illuminate the design trends they represent. There is a clear, continuing trend toward making ICF reactors inherently safer and environmentally benign. Since this trend accentuates inherent advantages of ICF reactors, we expect it to be further emphasized in the future. An emphasis on economic competitiveness appears to be a somewhat newer trend. Lower cost of electricity, smaller initial size (and capital cost), and more affordable development paths are three of the issues being addressed with new studies.
Date: April 17, 1985
Creator: Hogan, W.J. & Kulcinski, G.L.
Partner: UNT Libraries Government Documents Department
open access

Optimized flashlamp pumping of disc amplifiers

Description: Disk amplifier design for inertial fusion lasers has evolved with changing fusion-driver requirements from a primary emphasis on gain to a primary emphasis on efficiency. In this paper we compare Shiva and Nova amplifiers to a developmental amplifier (SSA) and show greater than a two-fold improvement in efficiency over past designs under all operating conditions. Experiments to optimize the efficiency of the SSA show that preionization of the flashlamps produces significant benefits and that the packing fraction of lamps is more important than the flashlamp reflector shape. They also show that the optimized flashlamp pulselength and reflector geometry depend on the desired stored energy in the laser medium. We have demonstrated a 7% storage efficiency at a stored fluence per disk of 0.5 J/cm/sup 2/ (stored energy density of 0.06 J/cm/sup 3/) and 4% at 2.0 J/cm/sup 2/ (0.25 J/cm/sup 3/). Comparison of SSA measurements with storage-efficiency calculations show that our flashlamp model accurately predicts the single-pass pumping of disk amplifiers. 24 refs., 22 figs.
Date: January 17, 1986
Creator: Murray, J. E.; Powell, H. T. & Woods, B. W.
Partner: UNT Libraries Government Documents Department
open access

Thermal damage study of beryllium windows used as vacuum barriers in synchrotron radiation beamlines

Description: An experimental study to investigate thermal-induced damage to SSRL-designed beryllium foil windows was performed at LLNL's Laser Welding Research Facility. The primary goal of this study was to determine the threshold at which thermal-stress-induced damage occurs in these commonly used vacuum barriers. An Nd:Yag pulsed laser with cylindrical optics and a carefully designed test cell provided a test environment that closely resembles the actual beamline conditions at SSRL. Tests performed on two beryllium window geometries, with different vertical aperture dimensions but equal foil thicknesses of 0.254 mm, resulted in two focused total-power thresholds at which incipient damage was determined. For a beam spot size similar to that of the Beamline-X Wiggler Line, onset of surface damage for a 5-mm by 25-mm aperture window was observed at 170 W after 174,000 laser pulses (1.2-ms pulse at 100 pps). A second window with double the vertical aperture dimension (10 mm by 25 mm) was observed to have surface cracking after 180,000 laser pulses with 85 W impinging its front surface. It failed after approximately 1,000,000 pulses. Another window of the same type (10 mm by 25 mm) received 2,160,000 laser pulses at 74.4 W, and subsequent metallographic sectioning revealed no signs of through-thickness damage. Comparison of windows with equal foil thicknesses and aperture dimensions has effectively identified the heat flux limit for incipient failure. The data show that halving the aperture's vertical dimension allows doubling the total incident power for equivalent onsets of thermal-induced damage.
Date: September 17, 1987
Creator: Holdener, F.R.; Johnson, G.L.; Karpenko, V.P.; Wiggins, R.K.; Cerino, J.A.; Dormiani, M.T. et al.
Partner: UNT Libraries Government Documents Department
open access

Removal of cesium from uranium recovery process wastes

Description: The Uranium Recovery Process (TBP Process) at Hanford extracts and decontaminates uranium from the Metal Waste produced in the Bismuth Phosphate Process. Aqueous waste, approximately equal in volume to that of the Metal Waste itself, results from the process. Although of several years' age, these wastes are still sufficiently radioactive that they must be returned to underground tanks for storage. For several years aqueous wastes of low radioactive content have been discharged to ground at Hanford. Polyvalent cations are strongly absorbed by the soil. Monovalent cations are poorly absorbed if present in solutions of high salt content. Ground waters migrate toward the Columbia River very slowly. These observations point out the desirability of removing, from wastes to be cribbed, those long-lived radioactive constituents which are poorly absorbed by soil. Cesium (Cs-137) and strontium (Sr-90) are the principal constituents of Hanford wastes which possess these characteristics. Strontium, while more hazardous biologically, is of somewhat less concern than cesium because it is better absorbed from high-salt solutions by soils. This report describes research done to develop on inexpensive process for the removal of fission products, especially cesium, from Uranium Recovery Process Wastes. 4 refs., 13 tabs.
Date: May 17, 1954
Creator: Burns, R. E.; Brandt, R. L. & Clifford, W. E.
Partner: UNT Libraries Government Documents Department
open access

Oxidation of hazardous waste in supercritical water: A comparison of modeling and experimental results for methanol destruction

Description: Recent experiments at Sandia National Laboratories conducted in conjunction with MODEC Corporation have demonstrated successful clean- up of contaminated water in a supercritical water reactor. These experiments targeted wastes of interest to Department of Energy production facilities. In this paper we present modeling and experimental results for a surrogate waste containing 98% water, 2% methanol, and parts per million of chlorinated hydrocarbons and laser dyes. Our initial modeling results consider only methanol and water. Experimental data are available for inlet and outlet conditions and axial temperature profiles along the outside reactor wall. The purpose of our model is to study the chemical and physical processes inside the reactor. We are particularly interested in the parameters that control the location of the reaction zone. The laboratory-scale reactor operates at 25 MPa., between 300 K and 900 K; it is modeled as a plug-flow reactor with a specified temperature profile. We use Chemkin Real-Gas to calculate mixture density, with the Peng-Robinson equation of state. The elementary reaction set for methanol oxidation and reactions of other C{sub 1} and C{sub 2} hydrocarbons is based on previous models for gas-phase kinetics. Results from our calculations show that the methanol is 99.9% destroyed at 1/3 the total reactor length. Although we were not able to measure composition of the fluid inside the experimental reactor, this prediction occurs near the location of the highest reactor temperature. This indicates that the chemical reaction is triggered by thermal effects, not kinetic rates. Results from ideal-gas calculations show nearly identical chemical profiles inside the reactor in dimensionless distance. However, reactor residence times are overpredicted by nearly 150% using an ideal-gas assumption. Our results indicate that this oxidation process can be successfully modeled using gas-phase chemical mechanisms. 23 refs., 8 figs.
Date: March 17, 1991
Creator: Butler, P.B. (Iowa Univ., Iowa City, IA (United States)); Bergan, N.E.; Bramlette, T.T. (Sandia National Labs., Albuquerque, NM (United States)); Pitz, W.J. & Westbrook, C.K. (Lawrence Livermore National Lab., CA (United States))
Partner: UNT Libraries Government Documents Department
open access

Compact Torus Compression of Microwaves

Description: The possibility that a compact torus (CT) might be accelerated to large velocities has been suggested by Hartman and Hammer. If this is feasible one application of these moving CTs might be to compress microwaves. The proposed mechanism is that a coaxial vacuum region in front of a CT is prefilled with a number of normal electromagnetic modes on which the CT impinges. A crucial assumption of this proposal is that the CT excludes the microwaves and therefore compresses them. Should the microwaves penetrate the CT, compression efficiency is diminished and significant CT heating results. MFE applications in the same parameters regime have found electromagnetic radiation capable of penetrating, heating, and driving currents. We report here a cursory investigation of rf penetration using a 1-D version of a direct implicit PIC code.
Date: May 17, 1985
Creator: Hewett, D. W. & Langdon, A. B.
Partner: UNT Libraries Government Documents Department

Quadrula mortoni, Specimen #927

Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits a round shape; moderately thick shell; white internal coloring; brown external coloring; external sculpturing in the form of pustules. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Date: March 17, 1972
Creator: Pettit, J.
Partner: Elm Fork Natural Heritage Museum

Quadrula petrina, Specimen #991

Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures between 100 - 120 mm in length and was assessed to be very-long dead when collected.
Date: August 17, 1979
Creator: Britton, Joseph & Britton, David
Partner: Elm Fork Natural Heritage Museum
open access

Time-implicit simulation of particle-fluid systems

Description: This paper presents one-dimensional particle-fluid hybrid simulations in which the strongly collisional components of the plasma (e.g., ions and thermal electrons with nu/sub cf/..delta..t > 1) are treated as fluids and the weakly collisional components (e.g., energetic electrons with nu/sub cp/..delta..t << 1) are treated as particles. Here nu/sub cf/ denotes the fluid ion and electron collision frequencies, nu/sub cp/ is the energetic particle collision frequency and ..delta..t is the time step. Collisions between particle and fluid components are treated by a Monte-Carlo method and mass transfers between the particle and fluid electron components are governed by collision frequency thresholds. The field is computed implicitly to allow time steps with ..omega../sub p/ ..delta..t > 1 (..omega../sub p/: plasma frequency).
Date: January 17, 1985
Creator: Denavit, J.
Partner: UNT Libraries Government Documents Department
open access

Mechanism of the optogalvanic effect in a hollow-cathode discharge

Description: There are two significantly different mechanisms proposed for the origin of the optogalvanic effect in a hollow-cathode discharge: (1) laser excitation of atoms to higher electronic states leads to an increased cross section for electron impact ionization, with the result that the excited atom becomes ionized and the conductivity of the discharge increases; and (2) laser excitation of atoms to higher electronic states perturbs the equilibrium established between the electron temperature and the atomic excitation temperature. Superelastic collisions between the electrons and the laser-excited atoms restore the equilibrium, with the excess energy ending up in an increased electron temperature and therefore an increased conductivity of the discharge. Both mechanisms undoubtedly proceed simultaneously and what needs to be determined is their relative importance at different discharge conditions and different excitation conditions. This is important because laser isotope enrichment schemes have been proposed using selective excitation in a hollow-cathode discharge. In order for these schemes to work, (1) must be the predominant mechanism. We have measured the optogalvanic signal, concentration of uranium atoms, impedance of the discharge, and electron temperature as a function of the discharge current in a neon-filled uranium hollow-cathode discharge. The hollow cathode operating characteristics are used as input parameters in a simple discharge model. Predictions of electron density, changes in electron temperature, and discharge impedance compare well with experimental observations. Our model and experimental observations yield a qualitative understanding of the optogalvanic effect in a hollow-cathode discharge and estimate the relative importance of the two optogalvanic mechanisms.
Date: June 17, 1983
Creator: Keller, Richard A.; Warner, Bruce E.; Zalewski, Edward F.; Dyer, P.; Engleman, Rolf, Jr. & Palmer, Byron A.
Partner: UNT Libraries Government Documents Department
open access

Study of EOCR Modifications for Testing Fast Reactor Fuels

Description: Report issued by the APDA over studies conducted on "methods for increasing the power generation in a fast reactor fuel element test sample" (p. 9). The methods investigated are presented and discussed. This report includes tables, and illustrations.
Date: February 17, 1964
Creator: Ball, G.; DeFelice, J.; Edwards, J. J.; Jens, W. H.; Kovac, L. R.; Poggi, R. et al.
Partner: UNT Libraries Government Documents Department
open access

Magnet technology for the Engineering Test Reactor

Description: The consideration for building an international Engineering Test Reactor emerged from the November 1985 Geneva Summit, in which President Reagan and Secretary Gorbachev called for the ''widest practical development of international cooperation'' in fusion. In parallel with the OTR design in the USSR, the FER in Japan, and the NET in Europe, the US has pursued the TIBER (Tokamak Ignition/Burn Experimental Reactor). This compact design of 3-m major radius is achievable because of high-current-density, radiation-tolerant magnets with nuclear heating rates up to 10 mW . cm/sup -3/. Full development of cable-in-conduit conductors (CICC) is seen as a credible path to achieve 40 A . mm/sup -2/ at fields of 12 T in the toroidal field (TF) coils and 14 T in the central poloidal field (PF) coils. Since neutron fluences of up to 10/sup 19/ n . cm/sup -2/ are expected in the TF coils, the unalloyed niobium-tin would be superior at 12 T. However, the central PF coil at 14 T is better shielded, so modified niobium tin would be advantageous. Polyimide insulation in the TF coils would withstand the equivalent 10/sup 10/) rads if loads in the winding pack are taken in compression. 13 refs., 7 figs., 2 tabs.
Date: September 17, 1987
Creator: Henning, C. D. & Miller, J. R.
Partner: UNT Libraries Government Documents Department
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