Access
Partner
UNT Libraries Government Documents Department
264
UNT Libraries Special Collections
249
Oklahoma Historical Society
136
Sterling Municipal Library
27
Calhoun County Public Library
21
Carl Albert Congressional Research and Studies Center
20
Deaf Smith County Library
20
UNT Libraries
20
Red River County Public Library
12
San Antonio Public Library
10
71 More
Collection
Texas Digital Newspaper Program
340
Office of Scientific & Technical Information Technical Reports
190
Tocker Foundation Grant
186
KXAS-NBC 5 News Collection
177
Oklahoma Digital Newspaper Program
159
Texas State Publications
34
Chickasha Newspaper Collection
30
Altus Times-Democrat
26
The Baytown Sun
26
Sapulpa Herald
26
128 More
Degree Department
Degree Discipline
Degree Level
Country
States
Year
Month
Language
1,062 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
1,062
next
The giant ion sources of neutral-beam injectors for fusion
All large tokamak fusion experiments today use auxiliary heating by multi-megawatt beams of neutral isotopes of hydrogen injected with energies in the neighborhood of 100 keV per atom. This requires reliable operation of large ion sources, each delivering many tens of amperes of protons or deuterons, and soon even tritons. For meaningful experiments these sources must operate with pulse durations measured in seconds, although the duty factor may still be small. It is remarkable that the successful sources developed in Europe, Japan and the US are all very similar in basic design: the plasma is produced by diffuse low-pressure high-current discharges in magnetic multipole buckets'' was distributed thermionically emitting cathodes. This paper briefly reviews the principal considerations and the basic physics of these sources, and summarizes the collective experience to date and describes the impressive recent performance of the US Common Long Pulse Source, as a specific example. 20 refs., 6 figs., 2 tabs.
Date:
July 1, 1989
Creator:
Kunkel, W.B.
Object Type:
Article
System:
The UNT Digital Library
Geologic and production characteristics of the Tight Mesaverde Group: Piceance Basin, Colorado
The Mesaverde Group of the Piceance Basin in western Colorado has been a pilot study area for government-sponsored tight gas sand research for over 20 years. This study provides a critical comparison of the geologic, production and reservoir characteristics of existing Mesaverde gas producing areas within the basin to those same characteristics at the MWX site near Rifle, Colorado. As will be discussed, the basin has been partitioned into three areas having similar geologic and production characteristics. Stimulation techniques have been reviewed for each partitioned area to determine the most effective stimulation technique currently used in the Mesaverde. This study emphasizes predominantly the southern Piceance Basin because of the much greater production and geologic data there. There may be Mesaverde gas production in northern areas but because of the lack of production and relatively few penetrations, the northern Piceance Basin was not included in the detailed parts of this study. 54 refs., 31 figs., 7 tabs.
Date:
July 1, 1989
Creator:
Myal, F. R.; Price, E. H.; Hill, R. E.; Kukal, G. C.; Abadie, P. A. & Riecken, C. C.
Object Type:
Report
System:
The UNT Digital Library
Integrated system design report
The primary objective of the integrated system test phase is to demonstrate the commercial potential of a coal fueled diesel engine in its actual operating environment. The integrated system in this project is defined as a coal fueled diesel locomotive. This locomotive, shown on drawing 41D715542, is described in the separate Concept Design Report. The test locomotive will be converted from an existing oil fueled diesel locomotive in three stages, until it nearly emulates the concept locomotive. Design drawings of locomotive components (diesel engine, locomotive, flatcar, etc.) are included.
Date:
July 1, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Dworshak Reservoir Investigations: Trout, Bass and Forage Species, 1988 Annual Report.
For the period March 1988 through February 1989, an estimated 154,558 angler-hours were expended to catch 20,037 rainbow trout, 3,933 smallmouth bass, and 14 bull trout. Estimated catch of other species, including cutthroat trout, whitefish, suckers, and squawfish totalled 84. Subcatchable rainbow trout (135 to 185mm) caught and released by boat anglers comprised 53% (12,770) of the total catch. An estimated 88.6% of the smallmouth bass caught were under the minimum legal size limit of 305mm and were released. Estimated harvest of smallmouth bass was 450. The highest monthly catch rate documented for all species excluding kokanee was 1.81 fish per hour during October. Severe weather conditions during February reduced effort and no fish were documented in the creel. Cumulative catch rates through the survey period for rainbow trout and smallmouth bass were .13 and .02, respectively. The lowest monthly catch rates generally occurred when fishing pressure was the highest, with fishing effort targeting on kokanee during the May through July high use periods. The Arlee strain rainbow trout was somewhat more vulnerable to boat anglers than the Shasta strain during the early post-release period. 20 refs., 16 figs., 12 tabs.
Date:
July 1, 1989
Creator:
Statler, David P.
Object Type:
Report
System:
The UNT Digital Library
MTX (Microwave Tokamak Experiment) diagnostic and auxiliary systems for confinement, transport, and plasma physics studies
This note describes the diagnostics and auxiliary systems on the Microwave Tokamak Experiment (MTX) for confinement, transport, and other plasma physics studies. It is intended as a reference on the installed and planned hardware on the machine for those who need more familiarity with this equipment. Combined with the tokamak itself, these systems define the opportunities and capabilities for experiments in the MTX facility. We also illustrate how these instruments and equipment are to be used in carrying out the MTX Operations Plan. Near term goals for MTX are focussed on the absorption and heating by the microwave beam from the FEL, but the Plan also includes using the facility to study fundamental phenomena in the plasma, to control MHD activity, and to drive current noninductively.
Date:
July 28, 1989
Creator:
Hooper, E. B.; Allen, S. L.; Casper, T. A. & Thomassen, K. I.
Object Type:
Report
System:
The UNT Digital Library
Simulation of atmospheric dispersion of radioactivity from the Chernobyl accident
Measurements of airborne radioactivity over Europe, Japan, and the United States indicated that the release from the Chernobyl reactor accident in the Soviet Union on April 26, 1986 contained a wide spectrum of fission up to heights of 7 km or more within a few days after the initial explosion. This high-altitude presence of radioactivity would in part be attributable to atmospheric dynamics factors other than the thermal energy released in the initial explosion. Indications were that two types of releases had taken place -- an initial powerful explosion followed by days of a less energetic reactor fire. The Atmospheric Release Advisory Capability (ARAC) at the Lawrence Livermore National Laboratory (LLNL) utilized three-dimensional atmospheric dispersion models to determine the characteristics of the source term (release) and the evolution of the spatial distributions of the airborne radioactivity as it was transported over Europe and subsequently over the northern hemisphere. This paper describes the ARAC involvement and the results of the hemispheric model calculations which graphically depict the extensive dispersal of radioactivity. 1 fig.
Date:
July 1, 1989
Creator:
Lange, R.; Sullivan, T.J. & Gudiksen, P.H. (Lawrence Livermore National Lab., CA (USA))
Object Type:
Article
System:
The UNT Digital Library
Results of the radiological survey at Kennedy Park, Money and Sidney Streets, Lodi, New Jersey (LJ062)
Maywood Chemical Works (MCW) of Maywood, New Jersey, generated process wastes and residues associated with the production and refining of thorium and thorium compounds from monazite ores from 1916 to 1956. MCW supplied rare earth metals and thorium compounds to the Atomic Energy Commission and various other government agencies from the late 1940s to the mid-1950s. Area residents used the sandlike waste from this thorium extraction process mixed with tea and cocoa leaves as mulch in their yards. Some of these contaminated wastes were also eroded from the site into Lodi Brook. At the request of the US Department of Energy (DOE), a group from Oak Ridge National Laboratory conducts investigative radiological surveys of properties in the vicinity of MCW to determine whether a property is contaminated with radioactive residues, principally {sup 232}Th, derived from the MCW site. The survey typically includes direct measurement of gamma radiation levels and soil sampling for radionuclide analyses. The survey of this site, Kennedy Park, Money and Sidney Streets, Lodi, New Jersey (LJ062), was conducted during 1986 and 1987. Results of the survey demonstrated radionuclide concentrations in excess of the DOE Formerly Utilized Sites Remedial Action Program criteria. The radionuclide distributions are typical of …
Date:
July 1, 1989
Creator:
Foley, R.D.; Cottrell, W.D. & Floyd, L.M.
Object Type:
Report
System:
The UNT Digital Library
Site Characterization Program at the Radioactive Waste Management Complex of the Idaho National Engineering Laboratory
The Radioactive Waste Management Complex (RWMC) Site Characterization Program is a continuation of the Subsurface Investigation Program (SIP). The scope of the SIP has broadened in response to the results of past work that identified hazardous as well as radionuclide contaminants in the subsurface environment and in response to the need to meet regulatory requirements. Two deep boreholes were cored at the RWMC during FY-1988. Selected sediment samples were submitted for Appendix IX of 40 CFR Part 264 and radionuclide analyses. Detailed geologic logging of archived core was initiated. Stratigraphic studies of the unsaturated zone were conducted. Studies to determine hydrologic properties of sediments and basalts were conducted. Geochemical studies and analyses were initiated to evaluate contaminant and radionuclide speciation and migration in the Subsurface Disposal Area (SDA) geochemical environment. Analyses of interbed sediments in boreholes D15 and 8801D did not confirm the presence of radionuclide contamination in the 240-ft interbed. Analyses of subsurface air and groundwater samples identified five volatile organic compounds of concern: carbon tetrachloride, trichloroethylene, 1,1,1-trichloroethane, chloroform, and tetrachloroethylene. 33 refs., 5 figs., 2 tabs.
Date:
July 1, 1989
Creator:
McElroy, D. L.; Rawson, S. A.; Hubbell, J. M.; Minkin, S. C.; Baca, R. G.; Vigil, M. J. et al.
Object Type:
Report
System:
The UNT Digital Library
[Letter from Julian Stanley to Richard Simms, July 28, 1989]
Letter from Julian Stanley to Richard Simms, on July 28, 1989, informing him that he will be willing to teach a class on the nature and needs of the gifted at UNT for two months.
Date:
July 28, 1989
Creator:
Stanley, Julian C.
Object Type:
Letter
System:
The UNT Digital Library
Article of Incorporation of Parents' Council, Texas Academy of Mathematics and Science
Articles of incorporation for the Texas Academy of Mathematics and Science Parents' Council. The articles include the name, status, duration, purpose, use of earnings, dissolution, selection of directors, president of the corporation, registered agents, and directors of the council. The bylaws of the Parents' Council are also included.
Date:
July 31, 1989
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Board OKs TAMS expansion
Article discussing the approved expansion of McConnell Hall, and the number of college and academy students who require campus housing.
Date:
July 20, 1989
Creator:
Hemby, Julie
Object Type:
Clipping
System:
The UNT Digital Library
Multiloop integral system test (MIST): Final report, Inter-group comparisons
The multiloop integral system test (MIST) was part of a multiphase program started in 1983 to address small-break loss-of-coolant accidents (SBLOCAs) specific to Babcock and Wilcox-designed plants. MIST was sponsored by the US Nuclear Regulatory Commission, the Babcock and Wilcox Owners Group, the Electric Power Research Institute, and Babcock and Wilcox. The unique features of the Babcock and Wilcox design, specifically the hot leg U-bends and steam generators, prevented the use of existing integral system data or existing integral system facilities to address the thermal-hydraulic SBLOCA questions. MIST and two other supporting facilities were specifically designed and constructed for this program, and an existing facility -- the once-through integral system (OTIS) -- was also used. Data from MIST and the other facilities will be used to benchmark the adequacy of system codes, such as RELAP5 and TRAC, for predicting abnormal plant transients. The individual tests are described in detail in Volumes 2 through 8 and Volume 11, and are summarized in Volume 1. Inter-group comparisons are addressed in this document, Volume 9. These comparisons are grouped as follows: mapping versus SBLOCA transients, SBLOCA, pump effects, and the effects of noncondensible gases. Appendix A provides an index and description of the …
Date:
July 1, 1989
Creator:
Gloudemans, J.R.
Object Type:
Report
System:
The UNT Digital Library
Renormalization theory of beam-beam interaction in electron-positron colliders
This note is devoted to explaining the essence of the renormalization theory of beam-beam interaction for carrying out analytical calculations of equilibrium particle distributions in electron-positron colliding beam storage rings. Some new numerical examples are presented such as for betatron tune dependence of the rms beam size. The theory shows reasonably good agreements with the results of computer simulations. 5 refs., 6 figs.
Date:
July 1, 1989
Creator:
Chin, Y. H.
Object Type:
Article
System:
The UNT Digital Library
Monte Carlo study of CP asymmetry measurement of a Tau-Charm Factory
It is shown that, for D/sup 0//bar D//sup 0/ mixing of order /approximately/ 1%, it may be possible to observe in a Tau-Charm Factory a CP violation effect in the D/sup 0//bar D//sup 0/ system via a CP asymmetry. The method used is to tag one D by its semi-leptonic decay and to look for decays of the other D into CP eigenstates. It is estimated that within 1 year of running at the designed luminosity of L = 10/sup 33/ cm/sup /minus/2/sec/sup /minus/1/, /approximately/ 6600 such events can be collected. 8 refs., 8 figs., 1 tab.
Date:
July 1, 1989
Creator:
Karshon, U.
Object Type:
Article
System:
The UNT Digital Library
Report from the polarization group of the Fermilab injector workshop
The group considered physics, accelerator, and polarized source issues. Most of the physics study was concerned with what significant and unique experiments could be done if polarized protons could be accelerated in the main injector and eventually in the Tevatron. 12 refs., 4 figs.
Date:
July 20, 1989
Creator:
Berger, E.; Glass, G.; Imai, K.; Jones, L.; Lin, A.M.T.; Mane, S.R. et al.
Object Type:
Article
System:
The UNT Digital Library
Damage and repair of irradiated mammalian brain
We have demonstrated that focal charged particle irradiation of the rabbit brain can create well-defined lesions which are observable by nuclear magnetic resonance imaging (NMR) and positron emission tomography (PET) imaging techniques. These are similar, in terms of location and characteristic NMR and PET features, to those that occur in the brain of about 10% of clinical research human subjects, who have been treated for intracranial vascular malformations with stereotactic radiosurgery. These lesions have been described radiologically as vasogenic edema of the deep white matter,'' and the injury is of variable intensity and temporal duration, can recede or progress to serious neurologic sequelae, and persist for a considerable period of time, frequently 18 mon to 3 yr. 8 refs., 6 figs.
Date:
July 1, 1989
Creator:
Frankel, K.; Lo, E.; Phillips, M.; Fabrikant, J.; Brennan, K.; Valk, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Neutron spectral and angular distribution measurements for 113 and 256 MeV protons on range-thick Al and sup 238 U targets using the foil activation techniques
Second neutron yields, energy spectra, and angular distributions have been measured at seven angles from 0 to 150{degree} for 113 and 256 MeV protons stopped in range-thick targets of aluminum and depleted uranium ({sup 238}U). Thin foil stacks of ten different materials were activated by secondary neutrons at distances of 20--30 cm from the targets. Following each irradiation, 30--40 different activation products were measured by gamma-ray spectroscopy. These activation rates were then used to adjust neutron energy spectra calculated by the HETC computer code. Activation cross sections were taken from ENDF/BV below 20 MeV, from literature values tested in Be(d,n) fields up to 50 MeV, and from proton spallation data and calculations from 50--250 MeV. Spectral adjustments were made with the STAY'SL computer code using a least-squares technique to minimize {chi}{sup 2} for a covariance matrix determined from uncertainties in the measured activities, cross sections, and calculated flux spectra. Neutron scattering effects were estimated from foil packets irradiated at different distances from the target. Proton effects were measured with (p,n) reactions. Systematic differences were found between the adjusted and calculated neutron spectra, namely, that HETC underpredicts the neutron flux at back angles by a factor of 2--3 and slightly overpredicts …
Date:
July 1, 1989
Creator:
Greenwood, L.R. & Intasorn, A.
Object Type:
Report
System:
The UNT Digital Library
Quantum groups, braiding matrices and coset models
We discuss a few results on quantum groups in the context of rational conformal field theory with underlying affine Lie algebras. A vertex-height correspondence - a well-known procedure in solvable lattice models - is introduced in the WZW theory. This leads to a new definition of chiral vertex operator in which the zero mode is given by the q-Clebsch Gordan coefficients. Braiding matrices of coset models are found to factorize into those of the WZW theories. We briefly discuss the construction of the generators of the universal enveloping algebra in Toda field theories. 21 refs., 2 figs.
Date:
July 1, 1989
Creator:
Itoyama, H.
Object Type:
Article
System:
The UNT Digital Library
Crystelle Waggoner Charitable Trust
A financial data report for the Crystelle Waggoner Charitable Trust. The financial report details their assets by the year starting from 1984 to 1988 and the support grant they have awarded for that following year. In addition information, no deadline, has been circled.
Date:
July 10, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Anne Burnett and Charles D. Tandy Foundation
A financial data report from the Anne Burnett and Charles D. Tandy Foundation for the tax year starting from 1984 to 1988. The data is tallied by how much assets the museum had at the end of the year and the amount they've awarded in grants.
Date:
July 11, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Helen Gertrude Sparks Charitable Trust
A financial data report on the Helen Gertrude Sparks Charitable Trust. The financial report lists the foundations assets by year starting from 1984 to 1988 and list the supporting grants they have awarded for the years as well. In the additional information, no deadlines, has been circled.
Date:
July 12, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Conservation potential of compact fluorescent lamps in India and Brazil
We evaluate the conservation potential of compact fluorescent lamps (CFLs) for managing the rapidly increasing electrical energy and peak demand in India and Brazil. Using very conservative assumptions, we find that the cost of conserved energy using 16 W CFLs is 4 and 6 times less than the long range marginal cost of electricity for the two countries. The cost of avoided peak installed capacity is 6 and 9.5 times less than the cost of new installed capacity for India and Brazil. The analysis is undertaken from the three separate perspectives of the national economies, the consumers, and the utilities. We find that because residential electricity is subsidized, the consumers have little or no incentive to purchase and install the CFLs, unless they too are subsidized. However, the benefits of CFL installation to the utility are so large that subsidizing them is a paying proposition for the utility are so large that subsidizing them is a paying proposition for the utility in almost all cases. As an illustration of a gradual introduction strategy for CFLs, we calculate a scenario where national savings of the order of US $1.2 million per day for India and US $2.5 million per day for …
Date:
July 1, 1989
Creator:
Gadgil, A.; Martino Jannuzzi, G. de (Lawrence Berkeley Lab., CA (USA) & Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia)
Object Type:
Report
System:
The UNT Digital Library
Helen Irwin Littauer Education Trust
A financial data report for the Helen Irwin Littauer Educational Trust. The financial report lists the foundations assets by the years from 1984 to 1988 and the supporting grant they awarded for that year as well. In the additional information, deadline: must be submitted annually, has been underlined.
Date:
July 11, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Mary Potishman Lard Trust Agency
A financial data report on the Mary Potishman Lard Trust Agency. The financial report defines their assets from the 1984 year to the 1988 year along with the grant they have awarded for that year.
Date:
July 12, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library