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134
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Measurement of p p --> p x Between 50-GeV and 400-GeV
The authors present measurements of the invariant cross section for the inclusive reaction p + p {yields} p + X in the region 0.14 < |t| < 0.38 GeV{sup 2}, 100 < s < 750 GeV{sup 2} and 0.07 < M{sub x/s}{sup 2} < 0.20.
Date:
September 1, 1973
Creator:
Abe, K.; De Lillo, T.; Robinson, B.; Sannes, F.; /Rutgers U., Piscataway; Carr, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Beta Backscatter Measurement of Aluminum Coatings on Mylar Substrates
A series of experiments was performed to determine the relative beta backscatter obtained from aluminum and from mylar. These experimental values were then compared with calculated values of relative backscatter.
Date:
September 1, 1974
Creator:
Abel, W. B. & Heckman, R. V.
Object Type:
Report
System:
The UNT Digital Library
Diffusion of gases in solids: rare gas diffusion in solids; tritium diffusion in fission and fusion reactor metals. Final report
Major results of tritium and rare gas diffusion research conducted under the contract are summarized. The materials studied were austenitic stainless steels, Zircaloy, and niobium. In all three of the metal systems investigated, tritium release rates were found to be inhibited by surface oxide films. The effective diffusion coefficients that control tritium release from surface films on Zircaloy and niobium were determined to be eight to ten orders of magnitude lower than the bulk diffusion coefficients. A rapid component of diffusion due to grain boundaries was identified in stainless steels. The grain boundary diffusion coefficient was determined to be about six orders of magnitude greater than the bulk diffusion coefficient for tritium in stainless steel. In Zircaloy clad fuel pins, the permeation rate of tritium through the cladding is rate-limited by the extremely slow diffusion rate in the surface films. Tritium diffusion rates through surface oxide films on niobium appear to be controlled by cracks in the surface films at temperatures up to 600/sup 0/C. Beyond 600/sup 0/C, the cracks appear to heal, thereby increasing the activation energy for diffusion through the oxide film. The steady-state diffusion of tritium in a fusion reactor blanket has been evaluated in order to …
Date:
September 1, 1976
Creator:
Abraham, P. M.; Chandra, D.; Mintz, J. M.; Elleman, T. S. & Verghese, K.
Object Type:
Report
System:
The UNT Digital Library
Genetic effects of low x-ray doses. Progress report, October 1, 1975--September 30, 1976. [Drosophila oogonia]
Experiments on dose-kinetics of x-ray induced sexlinked lethal mutations in Drosophila oogonia were continued. A wide range of doses was tested, with special emphasis on the low-dose range (20 to 500R). This year more data were added for O R, 200, 500, 1500R and some high doses. Oogonia of adult females were irradiated, and only one daughter from each experimental parent-female was analyzed for a new lethal in her maternal X-chromosome. Thus no clusters of mutations of identical origin are encountered. The extensive accumulated data do not support the linearity principle, firmly established for recessive mutations induced in mature spermatozoa for high doses down to very low x-ray doses. A mathematical model describing the mutational yield is included that suggests that recessive mutations, like chromosome aberrations, result from both one-track and two-track events, with the latter playing an increasingly important role at higher doses.
Date:
September 1, 1976
Creator:
Abrahamson, S. & Meyer, H. U.
Object Type:
Report
System:
The UNT Digital Library
Genetic effects of low x-ray doses. Progress report, October 1, 1976--September 30, 1977. [In Drosophila]
A linear-quadratic model of dose-kinetics is proposed for x-ray induced recessive lethal mutations in oogonia of Drosophila. From this it should follow that at higher total doses fractionation treatments should give a lower yield of mutations than an equivalent acute exposure. A dose of 6000 R, given acutely and in 3 different fractionation regimes gave results in the expected direction for 2 x 3000 R, and a significant decrease for 3 x 2000 R and for 4 x 1500 R fractionations.
Date:
September 1, 1977
Creator:
Abrahamson, S. & Meyer, H.U.
Object Type:
Report
System:
The UNT Digital Library
Genetic effects of low x-ray doses. Progress report, September 16, 1974-- September 30, 1975
Results are reported from large-scale experiments on the dose-kinetics of x-ray induced sex-linked lethal mutations in treated oogonia of Drosophila. (auth)
Date:
September 1, 1975
Creator:
Abrahamson, S. & Meyer, H.U.
Object Type:
Report
System:
The UNT Digital Library
Energy calibration scheme for acoustic emission
The calibration technique described is an attempt to determine the actual energy release from the events causing emission bursts in beryllium and to quantitatively evaluate the effects of specimen geometry on the apparent energy per burst. (GHT)
Date:
September 13, 1977
Creator:
Adams, R. O. & Heiple, C. R.
Object Type:
Article
System:
The UNT Digital Library
A Field Test of Selected Insects and Pathogens for Control of Waterhyacinths, Report 1: Preliminary Results for the 1975-76 Season
"During the growing season of 1975, a field experiment was initiated on Lake Concordia, Louisiana, to test the potential effectiveness of selected organisms as control agents against waterhyacinths, Eichhornia crassipes (Mart.) Solms. [...] This report describes the experiment, presents the collected data, and summarizes the observations. Statistical analyses and interpretation of the data are also presented" (abstract).
Date:
September 1977
Creator:
Addor, Eugene E.
Object Type:
Report
System:
The UNT Digital Library
Hydrogen-engine performance-analysis project. Third quarterly report first year of program
The objective of this research effort is to obtain the design data-base covering performance, operational characteristics and emissions essential for making a rational decision regarding the selection and design of prototype hydrogen-fueled, air-breathing engines capable of being manufactured for general automotive use. To this end hydrogen-fueled internal combustion engines were divided into fourteen subgroups. An engine representative of each subgroup will be tested during the course of the three year program. The Project Program Plan calls for investigation of pre-intake valve closing fuel ingestion (Pre IVC) hydrogen-fueled engines during the first two years. Work accomplished during the third 3-month period of the project is reported. Activities in this quarter included: water injection experiments with the throttled and unthrottled engine mode of operation; design and construction of exhaust gas recirculation (EGR) equipment for use with the EGR experiments with the throttled and unthrottled engine configuration; construction of lithium-filled exhaust valves; and analysis of data for annual report preparation purposes. (LCL)
Date:
September 1, 1977
Creator:
Adt, R. R., Jr.; Swain, M. R. & Pappas, J. M.
Object Type:
Report
System:
The UNT Digital Library
ACTVE News, Volume 6, Number 9, September 1975
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
September 1975
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
ACTVE News, Volume 7, Number 9, September 1976
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
September 1976
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
ACTVE News, Volume 8, Number 8, September 1977
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
September 1977
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
ACTVE News, Volume 9, Number 9, September 1978
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
September 1978
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
ACTVE News, Volume [10], Number 8, September 1979
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
September 1979
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Current and future directions in the study of light nuclei employing an on-line mass separator
Recent work on isospin quintets utilizing the on-line mass analysis system RAMA is described. Possibilities for future studies of both proton-rich and neutron-rich light nuclides towards the limits of nuclear stability are discussed. 4 figures.
Date:
September 1, 1979
Creator:
Aeystoe, J. & Cerny, J.
Object Type:
Article
System:
The UNT Digital Library
DAMAGE TO MITOCHONDRIAL ELECTRON TRANSPORT AND ENERGY COUPLING BY VISIBLE LIGHT
Plutonium is one of the principal materials of both commercial and military nuclear power. It is produced primarily in fission reactors that contain uranium fuel, and its importance arises from the fact that a large portion of the plutonium produced is fissile: like uranium 235, the mass 239 and 241 isotopes of plutonium can be caused to fission by neutrons, including those with low energy. Because such fission events also release neutrons, substantial amounts of energy can be extracted from plutonium in a controlled or an explosive nuclear chain reaction. Now that commercial nuclear reactors provide a noticeable fraction of United States (and world) electrical energy, these reactors account for most plutonium production. For the most part, this material now remains in the irradiated fuel after removal from reactors, but should this fuel be reprocessed, the plutonium could be recycled to provide part and even most of the fissile content of fresh fuel. For the current generation of water-cooled reactors, the amount of plutonium to be recycled is substantial. In fast breeder reactors, designed to produce more fissile material than they destroy, considerably larger quantities of plutonium would be recycled. In other types of advanced reactors, particularly those which depend …
Date:
September 1, 1977
Creator:
Aggarwal, B. B.; Quintanilha, A. T.; Cammack, R. & Packer, L.
Object Type:
Article
System:
The UNT Digital Library
Experimental investigation of a superconducting niobium X-band deflecting cavity and suggestions for the design of the deflectors for a superconducting rf beam separator at NAL
Design considerations for a deflecting cavity intended for a superconducting rf beam separator at NAL are reviewed. The design parameters given are based on an investigation of a 7-cell niobium test deflector operating at 8.665 GHz. Peak magnetic field of 740 G, corresponding to a peak electric field of 25 MV/m, and an equivalent deflecting field of 6.9 MV/m were obtained. (auth)
Date:
September 12, 1973
Creator:
Aggus, J.; Bauer, W.; Giordano, S.; Hahn, H. & Halama, H.J.
Object Type:
Report
System:
The UNT Digital Library
Infrared studies of the adsorption-desorption of water on monoclinic and tetragonal ZrO$sub 2$ as a function of temperature
None
Date:
September 1, 1974
Creator:
Agron, P.A.; Fuller, E.L. & Holmes, H.F.
Object Type:
Report
System:
The UNT Digital Library
Plasma experiments with 1. 06. mu. m lasers at the Lawrence Livermore Laboratory
Irradiation experiments were performed with the two beam Nd:YAG glass laser systems, Janus(approximately less than 40 J/100 psec, approximately 0.4 TW), Cyclops (approximately less than 70 J/100 psec, approximately 0.7 TW), and Argus (approximately less than 70 J, 35 psec, approximately 2 TW). Two classes of targets have been used, glass microshells (approximately 40 to 120 ..mu..m diameter x approximately 0.75 ..mu..m wall thickness) filled with an equimolar DT mixture and disks (approximately 160 to 600 ..mu..m diameter x approximately 10 ..mu..m thick) of several compositions. The targets were supported in vacuum (pressure approximately less than 10/sup -5/ Torr) by thin glass stalks. This paper reports results related to the propagation, absorption and scattering of laser light by both spherical and planar targets. The absorption measurements cannot be explained using only inverse Bremsstrahlung. The scattered light and the plasma energy are polarization dependent, which is evidence of resonance absorption. The x-ray spectra are characterized by a thermal and a suprathermal distribution. The ''temperature'' of the hot x-rays is given by theta/sub H/ approximately equals I./sup 3/-./sup 4/ depending on the target material. Evidence is also presented which indicates that the laser radiation pressure is producing density steepening in the region …
Date:
September 19, 1976
Creator:
Ahlstrom, H. G.; Holzrichter, J. F.; Manes, K. R.; Storm, E. K.; Haas, R. A.; Phillion, D. W. et al.
Object Type:
Article
System:
The UNT Digital Library
Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1975--August 31, 1976
A variety of new seismological methods is being developed for determining the structure of a geothermal energy source region. In one approach, seismic signals generated in the source region are utilized by interpreting them in terms of the parameters of a seismic source model. For example, using a fluid-filled tensile crack driven by excess pressure in fluid as a model of volcanic tremor, formulas are derived which relate seismic observations with model parameters, and applied the formulas successfully to an actual eruption in Kilauea, giving a new insight to the magma transport in a volcano. Theoretical work is continued on the diffraction of seismic waves by a crack and it was demonstrated that the size and location of a crack can be well determined by particle motion near the crack at various frequencies. The method was applied to Kilauea Iki and the location of the magma lens was found to be in agreement with that estimated by another method. An extensive field experiment in Kilauea Iki was carried out with the cooperation of USGS and SANDIA, and interesting properties of the magma reservoir were revealed by a multiple use of active, passive, conventional, and unconventional seismic methods. The self-contained, digital …
Date:
September 1, 1976
Creator:
Aki, K.
Object Type:
Report
System:
The UNT Digital Library
Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1977--August 31, 1978
New seismological methods were developed for determining the structure of a geothermal energy source region by the use of data from both active and passive experiments. Technical papers were published on four topics, namely: a field experiment at Kilauea Iki, source models of volcanic tremors, microearthquake source spectra, and a numerical study of elastic wave diffraction by fluid-filled cracks. In addition, papers were submitted for publication on a statistical synthesis of source mechanism of seismic events in Kilauea Iki and the observation of a temporal variation in the attenuation of earthquake coda in central California. The following subjects were worked on: (1) interpretation of seismic data from the LASL Hot Dry Rock system; (2) analyisis of volcanic tremor data from the U.S.G.S. Hawaiian seismic network; (3) frequency dependence and three-dimensional distribution of seismic attenuation in central Japan; (4) experimental study of seismic scattering by a penny-shaped crack; (5) development of a microprocessor system for the treatment of the data from digital event recorders.
Date:
September 1, 1978
Creator:
Aki, K.
Object Type:
Report
System:
The UNT Digital Library
Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1978-August 31, 1979
An interpretation theory based on the fluid-filled crack model of geothermal systems is being developed and tested against a variety of data from various geothermal areas. Progress is reported on the following subjects: (1) analysis and interpretation of seismic data obtained from the bore holes at the LASL Hot Dry Rock geothermal site. (2) Collection, analysis and interpretation of data on deep volcanic tremors at the USGS Hawaii Volcano Observatory. (3) Development of a new method for determining seismic attenuation at frequencies higher than 1HZ, and initiation of a cooperative work with Mexican seismologists on the attenuation measurements at various geothermal areas in Baja, California using the method. (4) Installation of 3-component digital event-recorders at four stations in the Newberry Peak volcano, Oregon. (5) Developing a computer program for calculating seismic motion generated by the vibration of fluid-filled crack in a layered medium.
Date:
September 1, 1979
Creator:
Aki, K.
Object Type:
Report
System:
The UNT Digital Library
Early San Antonio Acequia System 1730-1800
Map depicting the acequia water control system of the 18th century along the San Antonio River.
Date:
September 1970
Creator:
Alamo Area Council of Governments
Object Type:
Map
System:
The Portal to Texas History
[Map 1.] Utility Open Space in the AACOG Region
Map of the utility open space in the Alamo area, specifically denoting soil classes, aquifer recharge zones, sewage treatment sites, solid waste disposal sites, and mining sites.
Date:
September 1972
Creator:
Alamo Area Council of Governments
Object Type:
Map
System:
The Portal to Texas History