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[Letter from Nancy Reynolds to Vicki Rosenberg, November 10, 1992]
Photocopy of a letter from Nancy Reynolds, NTIEVA, to Vicki Rosenberg, program officer for the Getty Center, in regards to Rosenberg's interest in the Boys & Girls Clubs of Fort Worth. Reynolds states the the Club initially wanted NTIEVA to develop an art program for the six branches of Fort Worth, however, the person in charge of the program has no real power to implement the art program and their program director is opposed to the idea in general. Reynolds writes that the participants of the seminars feel that an art program is important and they want to implement programs into their branches, but unsure if progress will be made.
Date:
November 10, 1992
Creator:
Reynolds, Nancy
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Nancy Reynolds to Allison Perkins, August 10, 1992]
Photocopy of a letter from Nancy Reynolds, Project Coordinator of North Texas Institute for Educators on the Visual Arts, to Allison Perkins, Amon Carter Museum. To discuss the upcoming newsletter that Reynolds would like to distribute in September but needs information from Perkins on the Charlie Russell presentation scheduled for October. As well as inform Perkins that the institute is planning to offer a retreat for the consortium members at Ghost Ranch Conference Center in Abiquiu, New Mexico from March 14 - 18, 1993, and requests some Georgia O'Keefee's slides for a short presentation at the conference.
Date:
August 10, 1992
Creator:
Reynolds, Nancy
Object Type:
Letter
System:
The UNT Digital Library
Pyrolysis and gasification of coal at high temperatures
The macropore structure of chars is a major factor in determining their reactivity during the gasification stage. The major objectives of this contract were to (a) quantify by direct measurements the effect of pyrolysis conditions of the macropore structure, and (b) establish how the macropores affected the reactivity pattern, the ignition behavior and the fragmentation of the char particles during gasification in the regime of strong diffusional limitations. Results from this project provide much needed information on the factors that affect the quality of the solid products (chars) of coal utilization processes (for example, mild gasification processes). The reactivity data will also provide essential parameters for the optimal design of coal gasification processes. (VC)
Date:
February 10, 1992
Creator:
Zygourakis, K.
Object Type:
Report
System:
The UNT Digital Library
Development of improved iron Fischer-Tropsch catalysts
The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date:
January 10, 1992
Creator:
Bukur, D.B.
Object Type:
Report
System:
The UNT Digital Library
Synergistic capture mechanisms for alkali and sulfur species from combustion
An aerosol reactor system has been designed and constructed for the systematic study of the mechanisms governing the possible synergistic capture of sulfur oxide and alkalis with aluminosilicates and lime (CaO). Actual particle dynamics found in coal combustor systems can be simulated, mass balances can be closed, and the system conditions are well controlled. The collection of hot reactive aerosol flows is performed utilizing an isokinetic probe.
Date:
January 10, 1992
Creator:
Peterson, T.W.; Shadman, F.; Wendt, J.O.L. & Olsen, E.
Object Type:
Report
System:
The UNT Digital Library
[Letter from Alfred F. Hurley to M'Lou Bancroft, December 10, 1992]
Photocopy of a letter from Alfred F. Hurley, Chancellor of Texas College of Osteopathic Medicine, University of North Texas, to M'Lou Bancroft, executive director of the Edward and Betty Marcus Foundation. The letter is in regards to the chancellor's thanks on behalf of the entire institution on how please they were to receive the checks from the foundation to continued support of the North Texas Institute for Educators on the Visual Arts.
Date:
December 10, 1992
Creator:
Hurley, Alfred F.
Object Type:
Letter
System:
The UNT Digital Library
[Press Release: Gay and lesbian activists meet with Perot representatives following "insulting" comments]
A press release from the National Gay and Lesbian Task Force announcing gay and lesbian activists to meet with representatives from the H. Ross Parot campaign after discriminating comments.
Date:
June 10, 1992
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 84, No. 50, Ed. 1 Thursday, December 10, 1992
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
December 10, 1992
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 84, No. 37, Ed. 1 Thursday, September 10, 1992
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
September 10, 1992
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
Bogata News (Bogata, Tex.), Vol. 81, No. 43, Ed. 1 Thursday, September 10, 1992
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
September 10, 1992
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Bogata News (Bogata, Tex.), Vol. 82, No. 34, Ed. 1 Thursday, December 10, 1992
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
December 10, 1992
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
DC CICC Retrofit Magnet Preliminary Design, Software Development and Analysis Report
The proposed retrofit coil is made of superconducting Cable-in-Conduit Conductor (CICC). The coils are designed to produce a nominal vertical field of 4.5 tesla within the MHD channel based on a nominal current density of 13.05 MA/m{sup 2}. The coils are supported within a case, or so-called constant tension strap. When the magnet is energized, the electromagnetic J {times} B body forces push the winding pack laterally outward and vertically towards the machine's midplane, thus putting the strap in tension. The end turns add axial tension to the conductor (a condition which is not simulated by this 2-D model of the midlength cross section). A sketch of the magnet system and structure is shown in Fig. 1.0-1. The purpose of this report is to describe the progress made in the design and analysis of the DC CICC retrofit magnet, and to outline the proposed next step.
Date:
February 10, 1992
Creator:
Myatt, R. Leonard & Marston, P. G.
Object Type:
Report
System:
The UNT Digital Library
A novel approach to highly dispersing catalytic materials in coal for gasification
This project seeks to develop a technique, based on coal surface properties, for highly dispersing catalysts in coal for gasification and to investigate the potential of using potassium carbonate and calcium acetate mixtures as catalysts for coal gasification. The lower cost and higher catalytic activity of the latter compound will produce economic benefits by reducing the amount of K{sub 2}CO{sub 3} required for high coal char reactivities. As was shown in previous reports, coal loading with potassium or calcium at different pHs produced CO{sub 2} gasification activities which increased in the order pH 6 > pH 10 {much gt} pH 1. The current report shows that a similar trend was obtained when calcium and potassium were simultaneously loaded and char reaction times were less than about 75 min. Beyond this time, the coal impregnated with catalyst at pH 1 became more reactive, reaching 100% conversion after 1.5h. X-ray diffraction analysis suggest that the catalysts are well dispersed around pH 1 and 6 whereas reduced dispersion as obtained at pH 10. The reactivities are independent of the surface areas of the coals.
Date:
February 10, 1992
Creator:
Abotsi, G.M.K. & Bota, K.B.
Object Type:
Report
System:
The UNT Digital Library
The Savannah River Site's Groundwater Monitoring Program
The Environmental Protection Department/Environmental Monitoring Section (EPD/EMS) administers the Savannah River Site's (SRS) Groundwater Monitoring Program. During second quarter 1991 EPD/EMS conducted extensive sampling of monitoring wells. EPD/EMS established two sets of flagging criteria in 1986 to assist in the management of sample results. The flagging criteria do not define contamination levels; instead, they aid personnel in sample scheduling, interpretation of data, and trend identification. Beginning in 1991, the flagging criteria are based on EPA drinking water standards and method detection limits. A detailed explanation of the current flagging criteria is presented in the Flagging Criteria section of this document. Analytical results from second quarter 1991 are listed in this report.
Date:
January 10, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Synergistic capture mechanisms for alkali and sulfur species from combustion
Due to the generation of a wide variety of pollutants during coal combustion, research on the development of a multifunction sorbent for adsorbing SO{sub 2} and alkali compounds simultaneously is ongoing at the University of Arizona. The current work focuses on the thermodynamic behavior of the reacting system for alkali adsorption especially in gas phase. The temperature and pressure effects on sodium species and on the system are intensively investigated under the simulated flue gas composition condition. The interaction of sulfur dioxide with sodium chloride vapor and some other system elements is also explored.
Date:
January 10, 1992
Creator:
Peterson, T.W.; Shadman, F.; Wendt, J.O.L. & Wu, Baochun.
Object Type:
Report
System:
The UNT Digital Library
(Working model of new turbine pulser)
None
Date:
February 10, 1992
Creator:
Kotlyar, O.
Object Type:
Report
System:
The UNT Digital Library
Synergistic capture mechanisms for alkali and sulfur species from combustion
The research described here is directed towards an investigation of mechanisms governing the capture of alkali metals and SO{sub 2} by injection of clay based sorbents into a combustor environment. While the species of interest are products of coal combustion, the earlier parts of these investigations will use a gas flame doped with relevant levels of Potassium, Sodium and Sulfur dioxide typical of a coal flame environment. This ensures that the particles so sampled from the combustor are from the injected sorbents and not mixed with coal ash. The approach here is to translate results from bench scale studies into evaluating governing mechanisms at a practical combustor level scale in which there exist both temperature variations and flow mixing characteristics. The research will thus consist of two tasks: (1) Detailed experimental studies for Alkali metals K, Na and toxic metal Cr in the presence of SO{sub 2} in which effect of parameters such as Speciation, Temperature profiles, Injection temperatures, residence time, bulk concentration levels, sorbent particle size and sorbent injection rates will be evaluated. (2) Theoretical modeling: Both equilibrium thermodynamics and reaction kinetics models will be used to correlate the experimental data. For these experiments the Sorbent type is Kaolinite …
Date:
January 10, 1992
Creator:
Peterson, T.W.; Shadman, F.; Wendt, J.O.L. & Mwabe, P.O.
Object Type:
Report
System:
The UNT Digital Library
Differential calculus on quantum spaces and quantum groups
A review of recent developments in the quantum differential calculus. The quantum group GL[sub q](n) is treated by considering it as a particular quantum space. Functions on SL[sub q] (n) are defined as a subclass of functions on GL[sub q](n). The case of SO[sub q](n) is also briefly considered. These notes cover part of a lecture given at the XIX International Conference on Group Theoretic Methods in Physics, Salamanca, Spain 1992.
Date:
December 10, 1992
Creator:
Zumino, B.
Object Type:
Article
System:
The UNT Digital Library
A streamlined method for chiral fermions on the lattice
We discussed the use of renormalization counterterms to restore the chiral gauge symmetry in a lattice theory of Wilson fermions. We show that a large class of counterterms can be implemented automatically by making a simple modification to the fermion determinant.
Date:
November 10, 1992
Creator:
Bodwin, G.T. (Argonne National Lab., IL (United States). High Energy Physics Div.) & Kovacs, E.V. (Fermi National Accelerator Lab., Batavia, IL (United States))
Object Type:
Article
System:
The UNT Digital Library
Investigation of PACVD protective coating processes using advanced diagnostics techniques
Coherent anti-Stokes Raman Spectroscopy (CARS) is used to study the plasma-assisted chemical vapor deposition (PACVD) of TiB{sub 2}. CARS is applied to the dominent species in an inductively coupled B{sub 2}H{sub 6}/Ar rf plasma. Axial concentration profiles of diborane and hydrogen are probed in the plasma. A five-step mechanism is developed. Photochemical initiation of the chemical reaction is considered. 16 refs, 5 figs.(DLC)
Date:
July 10, 1992
Creator:
Roman, W.C.
Object Type:
Article
System:
The UNT Digital Library
Reactivity of young chars via energetic distribution measurements
We have developed what we believe to be the very first a priori prediction technique for the gasification reactivity of coal char. With this method the gasification reactivity of a coal char as function of temperature can be predicted from a single temperature programmed desorption (TPD) experiment following mild gasification at a single temperature (Calo et al., 1989; Hall and Calo, 1990a). This approach has been demonstrated for C0{sub 2} gasification of coal chars where the gasification reactivity is controlled by the thermal desorption of oxygen surface complexes formed during gasification. This approach may be extended to other oxidant species, such as steam, and carbon-hydrogen complexes for hydrogen gasification as well. In the current report, we present a summary of the work that has been conducted to date in constructing a new TGA/TPD-MS experimental system which provides us with the capability of simultaneous monitoring of transient sample mass data, as well as gas phase composition during thermal desorption experiments. In addition, we present some steam reactivity data obtained with another TGA (Cahn 113 system) which has been modified for steam gasification experiments.
Date:
June 10, 1992
Creator:
Calo, J.M.; Zhang, L.H.; Lu, W. & Lilly, W.D.
Object Type:
Report
System:
The UNT Digital Library
Nuclear studies with intermediate energy probes. [Dept. of Physics, Univ. of Virginia]
Data from measurements at NIKHEF-K of the electro-production of neutral pions from the proton were completely analyzed and axe about to be submitted for publication. These results represent the first precise measurement of this fundamental process in the threshold region. The results are completely consistent with calculations based upon the Low Energy Theorems. Results from studies of a gas jet target in the electron storage ring of the Saskatchewan Accelerator Laboratory (SAL) have been fully analyzed and are being prepared for publication. An Internal Target Development Facility (ITDF), established at NIKHEF-K in a collaborative effort for the purpose of developing higher density gas jet targets suitable for use in electron rings, is operational. Diagnostic techniques are being evaluated in preparation for evaluating jet technology options. Our study of the calcium isotopes ([sup 42]C and [sup 44]C) is nearing completion. Both the electron and proton scattering data have been completely analyzed. Consistent proton and neutron transition densities have been extracted, and are being compared to corresponding results from pion scattering. Preparations for ([gamma],[pi][sup [minus]]) measurements at SAL have been completed, and data taking is about to commence.
Date:
July 10, 1992
Creator:
Norum, B.E.
Object Type:
Report
System:
The UNT Digital Library
Release of ammonia from HAN-type PHA
A preliminary design basis for ammonia scrubbers in the DWPF has been issued. This design basis is based on a theoretical model of ammonia evolution from the SRAT, SME and RCT. It is desirable to acquire actual process data on ammonia evolution prior to performing detailed design of scrubbers for DWPF. The evolution of ammonia from the SRAT and SME in the Integrated DWPF Melter System (IDMS) was investigated during the HM4 run. In this run, Precipitate Hydrolysis Aqueous (PHA), which was made in the Precipitate Hydrolysis Experimental Facility (PHEF) using the HAN (hydroxylamine nitrate) process was used, thus resulting in PHA with a high concentration of ammonium ion.
Date:
June 10, 1992
Creator:
Zamecnik, J. R.
Object Type:
Report
System:
The UNT Digital Library
LIMB Demonstration Project Extension and Coolside Demonstration
This report presents results from the limestone Injection Multistage Burner (LIMB) Demonstration Project Extension. LIMB is a furnace sorbent injection technology designed for the reduction of sulfur dioxide (SO[sub 2]) and nitrogen oxides (NO[sub x]) emissions from coal-fired utility boilers. The testing was conducted on the 105 Mwe, coal-fired, Unit 4 boiler at Ohio Edison's Edgewater Station in Lorain, Ohio. In addition to the LIMB Extension activities, the overall project included demonstration of the Coolside process for S0[sub 2] removal for which a separate report has been issued. The primary purpose of the DOE LIMB Extension testing, was to demonstrate the generic applicability of LIMB technology. The program sought to characterize the S0[sub 2] emissions that result when various calcium-based sorbents are injected into the furnace, while burning coals having sulfur content ranging from 1.6 to 3.8 weight percent. The four sorbents used included calcitic limestone, dolomitic hydrated lime, calcitic hydrated lime, and calcitic hydrated lime with a small amount of added calcium lignosulfonate. The results include those obtained for the various coal/sorbent combinations and the effects of the LIMB process on boiler and plant operations.
Date:
November 10, 1992
Creator:
Goots, T.R.; DePero, M.J. & Nolan, P.S.
Object Type:
Report
System:
The UNT Digital Library