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538 Matching Results
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Exact calculations of nuclear-recoil energies from prompt gamma decays resulting from neutron capture
The results of an accurate determination of the recoil spectrum from (n, ..gamma..) reactions in molybdenum are presented. The recoil spectrum has been calculated from nuclear level structure data and measured branching ratios. Angular correlations between successive gammas have been accounted for using the standard theoretical techniques of Racah algebra and the density matrix formalism.
Date:
July 20, 1981
Creator:
Kinney, J.H.
Object Type:
Report
System:
The UNT Digital Library
Automatic voltage-imbalance detector
A device is described for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.
Date:
May 20, 1981
Creator:
Bobbett, R. E.; McCormick, J. B. & Kerwin, W. J.
Object Type:
Patent
System:
The UNT Digital Library
Selective emitter. Task II topical report for radiative-cooling materials
The theoretical basis of the selective emitter is that, if a material emits only in the 8-13 micron interval, it will absorb only in the same interval. After a survey of several candidate materials, the silicon oxynitride system was found to have better optical properties than previously used materials as well as economic feasibility, and efforts to acquire a sample are described. Other promising materials are described: polyvinylidene fluoride (Tedlar), silicon monoxide, silicon dioxide, and silicon nitride. (LEW)
Date:
September 20, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Development of marketable solar assisted heat pumps. Phase II. Summary report, technical results
A water source heat pump has been designed that is capable of operating over the range from 40 to 110/sup 0/F entering water temperature and has a heating coefficient of performance greater than six in the upper portion of this range. A computerized heat pump balance program was written to allow the performance of either a water-to-water or a water-to-air heat pump to be predicted in either the heating or cooling mode. A detailed program description, flow charts, and sample outputs are appended. The balance program was used to specify components for a high efficiency water-to-water and a high efficiency water-to-air heat pump. Performance predictions for both units in heating and in cooling are included. The water-to-water and water-to-air performance predictions were compared. The water-to-air approach was clearly superior. A detailed design and layout was done for the three solar-assisted water-to-air heat pump. A horizontal configuration was chosen for marketability reasons. The design was made consistent with high quantity production equipment available in our factories and should result in the lowest possible manufacturing cost. A key question to be answered in this project is whether a reciprocating compressor can operate without damage at the high suction pressures characteristic to the …
Date:
February 20, 1981
Creator:
Hundt, R. & Heard, S.
Object Type:
Report
System:
The UNT Digital Library
Electron cyclotron resonant heating (ECRH) diagnostic system on TMX
The ECRH diagnostics system monitors the net power delivered to the plasma by four 200-kW gyrotron oscillators, the frequency of each gyrotron, and some operating parameters of the gyrotron power supply system. The combination CAMAC- and GPIB-based data acquisition system is under desktop computer control that provides the capability for data conversion and display. The data acquisition system is also interfaced to the main computer system that acquires and archives the data.
Date:
October 20, 1981
Creator:
Coffield, F.E. & Griffin, D.H.
Object Type:
Article
System:
The UNT Digital Library
BX in situ oil shale project. Quarterly technical progress report, September 1-November 30, 1981
September 1, 1981-November 30, 1981, was the fourth consecutive quarter of superheated steam injection at the BX In Situ Oil Shale Project. During the quarter, 117,520 barrels of water as steam were injected into project injection wells at an average wellhead temperature of 715/sup 0/F and an average wellhead pressure of 1378 PSIG. During the same period, 148,516 barrels of fluid were produced from the project production wells for a produced-to-injected fluid ratio of 1.26 to 1.0. Net oil production for the quarter was 169 barrels.
Date:
December 20, 1981
Creator:
Dougan, P. M.
Object Type:
Report
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #4, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #2, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #7, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #6, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #5, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #8, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #9, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Female Dips a Pretzel into a Fineline Graphics Gloss Container #3, December 20, 1981]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Woman pipping a pretzel in white paint]
Photograph of a female holding a pretzel by one of the holes and letting the excess white paint drip into the fineline graphics high gloss finish container. The container is on a table with a black paper mach background, the female is standing by the side of the table next to a light switch holding the pretzel on her right hand with two fingers.
Date:
December 20, 1981
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
Improved solvent extraction recovery of shale oil. [DOE patent application]
An improved process for solvent extraction of organic matter from shale by two extraction steps in sequence. The extraction steps are: (1) treating a kerogen-containing shale with a solvent system comprising a combination of water and an alcohol at a temperature of about 375 to 425/sup 0/C; and (2) treating the product of (1) with a solvent system comprising a combination of an alcohol and another organic solvent at an elevated temperature, but not above about 425/sup 0/C. The organic matter is recovered by separating the liquid which results from step (2) from the shale solids.
Date:
July 20, 1981
Creator:
McKay, John F. & Chong, Shuang-Ling
Object Type:
Patent
System:
The UNT Digital Library
Analysis of the obstacles to financing geothermal hydrothermal commercialization projects and the government programs designed to remove them
The risks associated with geothermal hydrothermal commercialization are broken down into five categories: resource risk; technological risk; regulatory risk; investment parity risks; and institutional risk aversion. The impact of each risk upon geothermal financing is assessed. The federal government's programs to provide financial incentives for geothermal development are presented as follows: tax incentives; indirect financial incentives programs; direct grant/cost-sharing programs; and attempts at reducing regulatory risk through the enactment of legal and institutional reforms. (MHR)
Date:
March 20, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Shock-wave studies: modeling the giant planets
The giant planets - Jupiter, Saturn, Uranus, and Neptune - differ markedly from the inner, or terrestrial, planets. Observations of their average density, gravitational moments, and atmospheric composition have enabled astrophysicists to draw some conclusions as to their structure, but efforts have been hampered by a lack of accurate data on the chemical, physical, and thermodynamic properties of constituent materials at the extremely high temperatures and pressures characteristic of planetary interiors. Shock-wave experiments conducted recently at LLNL have provided more accurate equations of state and electrical conductivities for many of these materials, and these have led to improved structural models of the giant planets.
Date:
July 20, 1981
Creator:
Ross, M.
Object Type:
Article
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 73, No. 34, Ed. 1 Thursday, August 20, 1981
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
August 20, 1981
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
Status of TMX upgrade diagnostics construction
This report describes the status of the initial TMX Upgrade diagnostics and the state of development of additional diagnostics being prepared for later TMX Upgrade experiments. The initial diagnostic instrument set has been described in the TMX Upgrade Proposal. This set is required to get TMX Upgrade operational and to evaluate its initial performance. Additional diagnostic instruments are needed to then carry out the more detailed experiments outlined by the TMX Upgrade program milestones. The relation of these new measurements to the physics program is described in The TMX Upgrade Program Plan.
Date:
July 20, 1981
Creator:
Hornady, R. S.; Davis, J. C. & Simonen, T. C.
Object Type:
Report
System:
The UNT Digital Library
Framework for Evaluating the Effectiveness of Nuclear-Safeguards Systems. [Aggregated Systems Model (ASM)]
This paper describes an analytical tool for evaluating the effectiveness of safeguards that protect special nuclear material (SNM). The tool quantifies the effectiveness using several measures, including probabilities and expected times to detect and respond to malevolent attempts against the facility. These measures are computed for a spectrum of threats involving outsiders, insiders, collusion, falsification, and deceit. Overall system effectiveness is judged using performance indices aggregated over all threats. These indices can be used by designers and regulators when comparing costs and benefits of various safeguards. The framework is demonstrated with an example in which we assess vulnerabilities of a safeguards system and identify cost-effective design modifications.
Date:
October 20, 1981
Creator:
Al-Ayat, R. A. & Judd, B. R.
Object Type:
Article
System:
The UNT Digital Library
One-dimensional magnetohydrodynamic calculations of a hydrogen-gas puff
A one-dimensional Lagrangian calculation of the implosion of a hydrogen gas puff is presented. At maximum compression, 60% of the mass is located in a density spike .5 mm off the axis with a half width of 40 ..mu..m. The temperature on axis reaches 200 eV.
Date:
April 20, 1981
Creator:
Maxon, S. & Nielsen, P.D.
Object Type:
Article
System:
The UNT Digital Library
Advanced Selenide Thermoelectric Development Program. Final Report
The primary objective of this work was to demonstrate that copper silver selenide and TAGS could be segmented. The hot junction temperature was planned to be 725/sup 0/C with the segmentation temperature at 400/sup 0/C, both temperatures were selected to prevent excessive sublimation from the hot ends of the segments, respectively. The program was planned as a cooperative effort between General Atomic company and Teledyne Energy Systems. Accordingly, General Atomic synthesized the CuAgSe that was used to fabricate the test hardware that was ultimately delivered to General Atomic for testing. Both the CuAgSe and TAGS were hot pressed in an argon atmosphere then the segments were furnace-bonded to each other. A secondary objective was to produce CuAgSe powder by rapid solidification.
Date:
July 20, 1981
Creator:
Seetoo, W. R.
Object Type:
Report
System:
The UNT Digital Library
Single-pass continuous-flow leach test of PNL 76-68 glass: some selected Bead Leach I results
A single-pass continuous-flow leach test of PNL 76-68 glass beads (7 mm dia) was concluded after 420 days of uninterrupted operation. Variables included in the experimental matrix were flow-rate, leachant composition, and temperature. Analysis was conducted on all leachate samples for /sup 237/Np and /sup 239/Pu as well as a number of nonradioactive elements. Results indicated that flow-rate and leachant systematically affected the leach rate, but only slightly. Temperature effects were significant. Plutonium leach rate was lower at higher temperature suggesting that Pu sorption onto the beads was enhanced at the higher temperature. The range of leach rates for all analyzed elements (except Pu), at both temperatures, at all three flow rates, and with all three leachant compositions varied over only three orders of magnitude. The range of variables used in this experiment covered those expected in many proposed repository environments.
Date:
August 20, 1981
Creator:
Coles, D. G.
Object Type:
Report
System:
The UNT Digital Library