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Superconducting thermoelectric generator

Description: Thermoelectricity is produced by applying a temperature differential to dissimilar electrically conducting or semiconducting materials, thereby producing a voltage that is proportional to the temperature difference. Thermoelectric generators use this effect to directly convert heat into electricity; however, presently-known generators have low efficiencies due to the production of high currents which in turn cause large resistive heating losses. Some thermoelectric generators operate at efficie… more
Date: January 1, 1994
Creator: Metzger, J.D. & El-Genk, M.S.
Partner: UNT Libraries Government Documents Department
open access

Biocarrier Composition for and Method of Degrading Pollutants

Description: The present invention relates to biocarrier compositions that attract and bond pollutant-degrading antigens that will degrade the pollutants. Biocarriers are known generally as a variety of inert or semi-inert compounds or structures having the ability to sequester (attract), hold and biomagnify (enhance) specific microorganisms within their structure. Glass or polystyrene beads are the most well known biocarriers. The biocarrier, which is preferably in the form of glass microspheres, is coated… more
Date: January 1, 1994
Creator: Fliermans, Carl B.
Partner: UNT Libraries Government Documents Department
open access

Process for treating alkaline wastes for vitrification

Description: According to its major aspects and broadly stated, the present invention is a process for treating alkaline waste materials, including high level radioactive wastes, for vitrification. The process involves adjusting the pH of the wastes with nitric acid, adding formic acid (or a process stream containing formic acid) to reduce mercury compounds to elemental mercury and MnO{sub 2} to the Mn(II) ion, and mixing with class formers to produce a melter feed. The process minimizes production of hydro… more
Date: January 1, 1994
Creator: Hsu, Chia-lin W.
Partner: UNT Libraries Government Documents Department
open access

Flexible ultrasonic pipe inspection apparatus

Description: Pipe crawlers, pipe inspection {open_quotes}rabbits{close_quotes} and similar vehicles are widely used for inspecting the interior surfaces of piping systems, storage tanks and process vessels for damaged or flawed structural features. This paper describes the design of a flexible, modular ultrasonic pipe inspection apparatus.
Date: January 1, 1994
Creator: Jenkins, C.F. & Howard, B.D.
Partner: UNT Libraries Government Documents Department
open access

Immersible solar heater for fluids

Description: An immersible solar heater is described comprising a light-absorbing panel attached to a frame for absorbing heat energy from the light and transferring the absorbed heat energy directly to the fluid in which the heater is immersed. The heater can be used to heat a swimming pool, for example, and is held in position and at a preselected angle by a system of floats, weights and tethers so that the panel can operate efficiently. A skid can be used in one embodiment to prevent lateral movement of … more
Date: January 1, 1994
Creator: Hazen, T. C. & Fliermans, C. B.
Partner: UNT Libraries Government Documents Department
open access

Hydrogen storage composition and method

Description: A hydrogen storage composition based on a metal hydride dispersed in an aerogel prepared by a sol-gel process. The starting material for the aerogel is an organometallic compound, including the alkoxysilanes, organometals of the form M(OR){sub X} where R is an organic ligand of the form C{sub n}H{sub 2n+1}, and organometals of the form MO{sub x}Ry where R is an alkyl group, where M is an oxide-forming metal, n, x and y are integers and y is two less than the valence of M. A sol is prepared by c… more
Date: January 1, 1994
Creator: Wicks, G. G. & Heung, L. K.
Partner: UNT Libraries Government Documents Department
open access

Method for recovering materials from waste

Description: A method for recovering metals from metals-containing wastes, a vitrifying the remainder of the wastes for disposal. Metals-containing wastes such as circuit boards, cathode ray tubes, vacuum tubes, transistors and so forth, are broken up and placed in a suitable container. The container is heated by microwaves to a first temperature in the range of approximately 300--800{degrees}C to combust organic materials in the waste, then heated further to a second temperature in the range of approximate… more
Date: January 1, 1994
Creator: Wicks, G. G.; Clark, D. E. & Schulz, R. L.
Partner: UNT Libraries Government Documents Department
open access

Optical apparatus and method for sensing uranyl

Description: An optical sensing device for uranyl and other substances, a method for making an optical sensing device and a method for chemically binding uranyl and other indicators to glass, quartz, cellulose and similar substrates. The indicator, such as arsenazo III, is immobilized on the substrate using a chemical binding process. The immobilized arsenazo III causes uranyl from a fluid sample to bind irreversibly to the substrate at its active sites, thus causing absorption of a portion of light transmi… more
Date: January 1, 1994
Creator: Baylor, L.C. & Buchanan, B.R.
Partner: UNT Libraries Government Documents Department
open access

Composition for detecting uranyl

Description: The present invention relates to an indicator composition for use in spectrophotometric detection of a substance in a solution, and a method for making the composition. Useful indicators are sensitive to the particular substance being measured, but are unaffected by the fluid and other chemical species that may be present in the fluid. Optical indicators are used to measure the uranium concentration of process solutions in facilities for extracting uranium from ores, production of nuclear fuels… more
Date: January 1, 1994
Creator: Baylor, Lewis C. & Stephens, Susan M.
Partner: UNT Libraries Government Documents Department
open access

Method for compression of data using single pass LZSS and run-length encoding

Description: A method used preferably with LZSS-based compression methods for compressing a stream of digital data. The method uses a run-length encoding scheme especially suited for data strings of identical data bytes having large run-lengths, such as data representing scanned images. The method reads an input data stream to determine the length of the data strings. Longer data strings are then encoded in one of two ways depending on the length of the string. For data strings having run-lengths less than … more
Date: January 1, 1994
Creator: Berlin, Gary J.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for determining material structural integrity

Description: Disclosed are a nondestructive method and apparatus for determining the structural integrity of materials by combining laser vibrometry with damping analysis to determine the damping loss factor. The method comprises the steps of vibrating the area being tested over a known frequency range and measuring vibrational force and velocity vs time over the known frequency range. Vibrational velocity is preferably measured by a laser vibrometer. Measurement of the vibrational force depends on the vibr… more
Date: January 1, 1994
Creator: Pechersky, M. J.
Partner: UNT Libraries Government Documents Department
open access

Plutonium dissolution process

Description: A two-step process for dissolving Pu metal is disclosed in which two steps can be carried out sequentially or simultaneously. Pu metal is exposed to a first mixture of 1.0-1.67 M sulfamic acid and 0.0025-0.1 M fluoride, the mixture having been heated to 45-70 C. The mixture will dissolve a first portion of the Pu metal but leave a portion of the Pu in an oxide residue. Then, a mineral acid and additional fluoride are added to dissolve the residue. Alternatively, nitric acid between 0.05 and 0.0… more
Date: January 1, 1994
Creator: Vest, Michael A.; Fink, Samuel D.; Karraker, David G.; Moore, Edwin N. & Holcomb, H. Perry
Partner: UNT Libraries Government Documents Department
open access

Process for Removing Cadmium From Scrap Metal

Description: A process for the recovery of a metal, in particular, cadmium contained in scrap, in a stable form. The process comprises the steps of mixing the cadmium-containing scrap with an ammonium carbonate solution, preferably at least a stoichiometric amount of ammonium carbonate, and/or free ammonia, and an oxidizing agent to form a first mixture so that the cadmium will react with the ammonium carbonate to form a water-soluble ammine complex; evaporating the first mixture so that ammine complex diss… more
Date: January 1, 1994
Creator: Kronberg, James W.
Partner: UNT Libraries Government Documents Department
open access

Optical temperature sensor using thermochromic semiconductors

Description: Optical thermometry is a growing technological field which exploits the ability of certain materials to change their optical properties with temperature. A subclass of such materials are those which change their color as a reversible and reproducible function of temperature. These materials are thermochromic. This invention is a composition to measure temperature utilizing thermochromic semiconductors.
Date: January 1, 1994
Creator: Kronberg, James W.
Partner: UNT Libraries Government Documents Department
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