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E-1 1989 Quality (Ca. 1989)
None
Date:
1989~
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
2 + 1 dimensional quantum gravity and the braid group
This paper discusses the following on quantum gravity: 2 + 1 gravity as a Chern-Simons theory; quantization; dynamics; the Braid group; and the emergence of space and time. 16 refs., 3 figs. (LSP)
Date:
October 1, 1989
Creator:
Carlip, S.
Object Type:
Article
System:
The UNT Digital Library
A 2-MeV microwave thermionic gun
A high-gradient, S-band microwave gun with a thermionic cathode is being developed in a collaborative effort by AET, Varian, and SSRL. A prototype design using an upgraded Varian dispenser cathode mounted with thermal isolation directly in the first half-cell of a 1-1/2 cell, side-coupled, standing-wave cavity has been fabricated and is being tested. Optimization of the cavity shape and beam formation was done using SUPERFISH, MASK, and PARMELA. An overview of design details, as well as the status of in-progress beam tests, will be presented. 9 refs., 6 figs.
Date:
August 1, 1989
Creator:
Tanabe, E.; Borland, M.; Green, M. C.; Miller, R. H.; Nelson, L. V.; Weaver, J. N. et al.
Object Type:
Article
System:
The UNT Digital Library
3-D computer simulations of EM field sin the APS vacuum chamber. Part 2: Time-domain analysis
Our simulations suggest that the strong peak around 4 GHz in the narrow gap observed in the measurements is generated by TE modes. Therefore, one should not worry about this peak insofar as the coupling impedance is concerned. On the other hand, some discrepancies between our simulations and the measurements are noticed and remain to be resolved.
Date:
January 20, 1989
Creator:
Chou, W.
Object Type:
Report
System:
The UNT Digital Library
A 3-D dynamical/chemical GCM for simulating the anthropogenical effects on ozone
In spite of the significantly increased attention atmospheric ozone has received over the last two decades or so, a fully quantitative understanding of the three-dimensional ozone structure remains unavailable. In the past, one-dimensional (vertical column) models have provided most of the quantitative simulations of atmospheric chemical systems, because these models can treat large ensembles of chemical process economically. More recently, two-dimensional (meridional cross section) models have become popular, in part because of increasing computer capabilities. There has been little work using a sophisticated 3-D GCM coupled with a comprehensive photochemical model to study the chemical-dynamical interactions involving the ozone abundance. Namely, either the dynamics or the chemistry is too simplified in most of the existing models. Relatively more advanced photochemistry has been included in the stratospheric models (dealing the vertical domain from 20 to 70 km above the surface) at the expense of tropospheric details. An important motivation for this research has been the desire to estimate the magnitude of changes in the ozone layer induced by anthropogenic perturbations such as the injection of oxides of nitrogen and chlorine compounds. Accordingly, the attempt has been to develop a complete but feasible photochemical scheme and to combine it with the Los …
Date:
January 1, 1989
Creator:
Kao, C. Y. J.; Glatzmaier, G. A.; Malone, R. C. & Turco, R. P.
Object Type:
Article
System:
The UNT Digital Library
3-D heat transfer computer calculations of the performance of the IAEA's air-bath calorimeters
A three dimensional (3-D) heat transfer computer code was developed to study and optimize the design parameters and to better understand the performance characteristics of the IAEA's air-bath calorimeters. The computer model accounts for heat conduction and radiation in the complex materials of the calorimeter and for heat convection and radiation at its outer surface. The temperature servo controller is modelled as an integral part of the heat balance equations in the system. The model predictions will be validated against test data using the ANL bulk calorimeter. 11 refs., 6 figs.
Date:
January 1, 1989
Creator:
Elias, E.; Kaizermann, S.; Perry, R. B. & Fiarman, S.
Object Type:
Article
System:
The UNT Digital Library
A 3-D measurement system using object-oriented FORTH
Discussed is a system for storing 3-D measurements of points that relates the coordinate system of the measurement device to the global coordinate system. The program described here used object-oriented FORTH to store the measured points as sons of the measuring device location. Conversion of local coordinates to absolute coordinates is performed by passing messages to the point objects. Modifications to the object-oriented FORTH system are also described. 1 ref.
Date:
January 1, 1989
Creator:
Butterfield, K.B.
Object Type:
Article
System:
The UNT Digital Library
3-D structures and intrinsic defects in trans-polyacetylene
We report first-principles local-density functional pseudopotential calculations of static and dynamic electronic structure properties of crystalline 3-D trans--(CH)/sub x/. We find a broken symmetry ground state of P2/sub 1//a symmetry with in-phase dimerizations. Using a Green's function technique, we show that the 3-D character of the electronic band edge states strongly suppresses self-trapping, destabilizing polarons and possibly bipolarons as well in perfectly ordered 3-D trans--(CH)/sub x/. 26 refs.
Date:
January 1, 1989
Creator:
Vogl, Peter & Campbell, David K.
Object Type:
Article
System:
The UNT Digital Library
[10 Ball Jefferson Blvd, 1989]
Photograph showing a mural of a ten-ball which bounces across the bottom of an exterior wall. The mural is painted on the side of a recreational building with "Club Privado" painted above it. Days of the week are painted in Spanish directly above the ten-ball. [1989, Dallas, TX]
Date:
1989
Creator:
Doherty, Richard
Object Type:
Photograph
System:
The UNT Digital Library
A 12-MW-scale pilot study of in-duct scrubbing (IDS) using a rotary atomizer
A low-cost, moderate-removal efficiency, flue gas desulfurization (FGD) technology was selected by the US Department of Energy for pilot demonstration in its Acid Rain Precursor Control Technology Initiative. The process, identified as In-Duct Scrubbing (IDS), applies rotary atomizer techniques developed for lime-based spray dryer FGD while utilizing existing flue gas ductwork and particulate collectors. IDS technology is anticipated to result in a dry desulfurization process with a moderate removal efficiency (50% or greater) for high-sulfur coal-fired boilers. The critical elements for successful application are: (1) adequate mixing of sorbent droplets with flue gas for efficient reaction contact, (2) sufficient residence time to produce a non-wetting product, and (3) appropriate ductwork cross-sectional area to prevent deposition of wet reaction products before particle drying is comple. The ductwork in many older plants, previously modified to meet 1970 Clean Air Act requirements for particulate control, usually meet these criteria. A 12 MW-scale IDS pilot plant was constructed at the Muskingum River Plant of the American Electric Power System. The pilot plant, which operates from a slipstrem attached to the air-preheater outlet duct from the Unit 5 boiler at the Muskingum River Plant (which burns about 4% sulfur coal), is equipped with three atomizer …
Date:
November 1, 1989
Creator:
Samuel, E. A.; Murphy, K. R. & Demian, A.
Object Type:
Report
System:
The UNT Digital Library
A 12-MW-scale pilot study of in-duct scrubbing (IDS) using a rotary atomizer
A low-cost, moderate-removal efficiency, flue gas desulfurization (FGD) technology was selected by the US Department of Energy for pilot demonstration in its Acid Rain Precursor Control Technology Initiative. The process, identified as In-Duct Scrubbing (IDS), applies rotary atomizer techniques developed for lime-based spray dryer FGD while utilizing existing flue gas ductwork and particulate collectors. IDS technology is anticipated to result in a dry desulfurization process with a moderate removal efficiency (50% or greater) for high-sulfur coal-fired boilers. The critical elements for successful application are: (1) adequate mixing of sorbent droplets with flue gas for efficient reaction contact, (2) sufficient residence time to produce a non-wetting product, and (3) appropriate ductwork cross-sectional area to prevent deposition of wet reaction products before particle drying is comple. The ductwork in many older plants, previously modified to meet 1970 Clean Air Act requirements for particulate control, usually meet these criteria. A 12 MW-scale IDS pilot plant was constructed at the Muskingum River Plant of the American Electric Power System. The pilot plant, which operates from a slipstrem attached to the air-preheater outlet duct from the Unit 5 boiler at the Muskingum River Plant (which burns about 4% sulfur coal), is equipped with three atomizer …
Date:
November 1, 1989
Creator:
Samuel, E. A.; Murphy, K. R. & Demian, A.
Object Type:
Report
System:
The UNT Digital Library
A 14-MeV beam-plasma neutron source for materials testing
The design and performance of 14-MeV beam-plasma neutron sources for accelerated testing of fusion reactor materials are described. Continuous production of 14-MeV neutron fluxes in the range of 5 to 10 MW/m{sup 2} at the plasma surface are produced by D-T reactions in a two-component plasma. In the present designs, 14-MeV neutrons result from collisions of energetic deuterium ions created by transverse injection of 150-keV deuterium atoms on a fully ionized tritium target plasma. The beam energy, which deposited at the center of the tritium column, is transferred to the warm plasma by electron drag, which flows axially to the end regions. Neutral gas at high pressure absorbs the energy in the tritium plasma and transfers the heat to the walls of the vacuum vessel. The plasma parameters of the neutron source, in dimensionless units, have been achieved in the 2XIIB high-{beta} plasma. The larger magnetic field of the present design permits scaling to the higher energy and density of the neutron source design. In the extrapolation, care has been taken to preserve the scaling and plasma attributes that contributed to equilibrium, magnetohydrodynamic (MHD) stability, and microstability in 2XIIB. The performance and scaling characteristics are described for several designs chosen …
Date:
January 1, 1989
Creator:
Futch, A. H.; Coensgen, F. H.; Damm, C. C. & Molvik, A. W.
Object Type:
Article
System:
The UNT Digital Library
[16 :10 sec spot clip PSA compilation]
Video recording from The Black Academy of Arts and Letters including a series of :10 sec PSAs for the Junior Black Academy to be aired May 21st 1989. Each PSA is preceded by a slide of the creation information. The footage features celebrities' active in the organization and from a variety of arts reciting the same script.
Date:
1989
Creator:
GrimCo Productions
Object Type:
Video
System:
The UNT Digital Library
[16 :10 sec spot clip PSA compilation, 2]
Video recording from The Black Academy of Arts and Letters including a series of :10 sec PSAs for the Junior Black Academy to be aired May 21st 1989. Each PSA is preceded by a slide of the creation information. The footage features celebrities' active in the organization and from a variety of arts reciting the same script.
Date:
May 1989
Creator:
GrimCo Productions
Object Type:
Video
System:
The UNT Digital Library
A 30 MW, 10 GHz Gyroklystron With Linear Collider Application
In this paper, the final preparations for bringing the University of Maryland's 10 GHz, 30 MW gyroklystron experiment on-line are discussed. We describe the initial operation of the modulator and the acceptance tests performed on the electron gun. We explain the enhanced circuit modelling and present a two-cavity design which predicts an efficiency of 33% and a gain of 27 dB. The realization of the design is also discussed. In addition, we briefly discuss the output waveguide and the diagnostics for beam and rf characterization. Finally, a four-cavity circuit design is presented with its predicted operating parameters that can achieve the necessary gain and efficiency required for accelerator application. 14 refs., 11 figs., 5 tabs.
Date:
January 1, 1989
Creator:
Lawson, W.; Latham, P.E.; Calame, J.; Skopec, M.; Welsh, D.; Hogan, B. et al.
Object Type:
Article
System:
The UNT Digital Library
40 CFR 265 interim-status ground-water monitoring plan for the 2101-M pond
This report outlines a ground-water monitoring plan for the 2101-M pond, located in the southwestern part of the 200-East Area on the Hanford Site in south-central Washington State. It has been determined that hazardous materials may have been discharged to the pond. Installation of an interim-status ground-water monitoring system is required under the Resource Conservation and Recovery Act to determine if hazardous chemicals are moving out of the pond. This plan describes the location of new wells for the monitoring system, how the wells are to be completed, the data to be collected, and how those data can be used to determine the source and extent of any ground-water contamination from the 2101-M pond. Four new wells are planned, one upgradient and three downgradient. 35 refs., 12 figs., 9 tabs.
Date:
March 1, 1989
Creator:
Chamness, M.A.; Luttrell, S.P. & Dudziak, S.
Object Type:
Report
System:
The UNT Digital Library
40 CFR 265 interim status indicator-evaluation ground-water monitoring plan for the 216-B-63 trench
This document outlines a ground-water monitoring plan for the 216-B-63 trench located in the northeast corner of the 200-East Area on the Hanford Site in southeastern Washington State. It has been determined that hazardous materials (corrosives) were disposed of to the trench during past operations. Installation of an interim-status ground-water monitoring system is required to determine whether hazardous chemicals are leaching to the ground water from beneath the trench. This document summarizes the existing data that are available from near the 216-B-63 trench and presents a plan to determine the extent of ground-water contamination, if any, derived from the trench. The plan calls for the installation of four new monitoring wells located near the west end of the trench. These wells will be used to monitor ground-water levels and water quality immediately adjacent to the trench. Two existing RCRA monitoring wells, which are located near the trench and hydraulically upgradient of it, will be used as background wells. 46 refs., 15 figs., 12 tabs.
Date:
March 1, 1989
Creator:
Bjornstad, B.N. & Dudziak, S.
Object Type:
Report
System:
The UNT Digital Library
65 Minutes, January-February 1989
Bimonthly newsletter of Denton Boy Scout Troop 65 containing a list of upcoming events, news and announcements, and other information for members.
Date:
January 1989
Creator:
Boy Scouts of America. Troop 65 (Denton, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
65 Minutes, July-August 1989
Bimonthly newsletter of Denton Boy Scout Troop 65 containing a list of upcoming events, news and announcements, and other information for members.
Date:
July 1989
Creator:
Boy Scouts of America. Troop 65 (Denton, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
65 Minutes, March-April 1989
Bimonthly newsletter of Denton Boy Scout Troop 65 containing a list of upcoming events, news and announcements, and other information for members.
Date:
March 1989
Creator:
Boy Scouts of America. Troop 65 (Denton, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
65 Minutes, May-June 1989
Bimonthly newsletter of Denton Boy Scout Troop 65 containing a list of upcoming events, news and announcements, and other information for members.
Date:
May 1989
Creator:
Boy Scouts of America. Troop 65 (Denton, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
65 Minutes, October-December 1989
Bimonthly newsletter of Denton Boy Scout Troop 65 containing a list of upcoming events, news and announcements, and other information for members.
Date:
October 1989
Creator:
Boy Scouts of America. Troop 65 (Denton, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
['89 Board of Regents group photo 1]
Photograph of the nine members of the University of North Texas Board of Regents, five seated and four standing behind them, who are posed for a group photo. The men in the photo are wearing suits and ties and the women are dressed either in skirts or dresses. Behind them is a cabinet with glass doors and plants are on either side.
Date:
1989
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
['89 Board of Regents group photo 2]
Photograph of the nine members of the University of North Texas Board of Regents, five seated and four standing behind them, who are posed for a group photo. The men in the photo are wearing suits and ties and the women are dressed either in skirts or dresses. Behind them is a cabinet with glass doors and plants are on either side.
Date:
1989
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library