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1,278 Matching Results
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NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
Methods of preparation of the copper, cobalt, and titanium catalysts were outlined. The catalyst samples were then analyzed through nuclear magnetic and nuclear quadrupole resonance.
Date:
February 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A study of steady-state steam-water counterflow in porous media
Vapor-liquid counterflow in porous media arises in processes such as heat pipes, oil recovery and geothermal systems. Previous studies analysed these phenomena in separate contexts. This paper presents a unified description from which previous models result as limiting cases. The analysis includes capillarity, heat conduction, and Kelvin effects. The importance of each term to various processes is examined. Significantly, it is found that the critical heat flux is not constant but increases with decreasing permeability. A threshold permeability is identified below which steady states may not exist. Analogous conclusions are reached regarding liquid-dominated geothermal systems. 24 refs., 15 figs.
Date:
February 1, 1990
Creator:
Satik, C.; Parlar, M. & Yortsos, Y.C.
Object Type:
Report
System:
The UNT Digital Library
Control of alpha particle transport by spatially inhomogeneous ion cyclotron resonance heating
Control of the radial alpha particle transport by using Ion Cyclotron Range of Frequency waves is investigated in a large-aspect-ratio tokamak geometry. It is shown that spatially inhomogeneous ICRF-wave energy with properly selected frequencies and wave numbers can induce fast convective transport of alpha particles at the speed of order {upsilon}{sub alpha} {approximately} (P{sub RF}/n{sub {alpha}}{epsilon}{sub 0}) {rho}{sub p}, where P{sub RF} is the ICRF-wave power density, n{sub {alpha}} is the alpha density, {epsilon}{sub 0} is the alpha birth energy, and {rho}{sub p} is the poloidal gyroradius of alpha particles at the birth energy. Application to ITER plasmas is studied and possible antenna designs to control alpha particle flux are discussed. 8 refs., 3 figs.
Date:
February 1, 1990
Creator:
Chang, C. S.; Imre, K.; Weitzner, H. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences) & Colestock, P. (Princeton Univ., NJ (USA). Plasma Physics Lab.)
Object Type:
Report
System:
The UNT Digital Library
The thermodynamic properties of 2-methylaniline and trans-(R,S)- decahydroquinoline
Measurements leading to the calculation of the ideal-gas thermodynamic properties for 2-methylaniline and trans-(R,S)-decahydroquinoline are reported. Experimental methods included combustion calorimetry, adiabatic heat-capacity calorimetry, comparative ebulliometry, inclined-piston gauge manometry, and differential-scanning calorimetry (dsc). Entropies, enthalpies, and Gibbs energies of formation were derived for the ideal gas at selected temperatures for both compounds. Critical properties were determined for 2-methylaniline with the dsc. Measured combustion enthalpies, vapor pressures, critical properties, and ideal-gas entropies were compared with estimated and experimental literature values. 59 refs., 7 figs., 15 tabs.
Date:
February 1, 1990
Creator:
Steele, W. V.; Chirico, R. D.; Nguyen, A. & Knipmeyer, S. E.
Object Type:
Report
System:
The UNT Digital Library
Control of energetic ion confinement by ion cyclotron range of frequency waves
It is shown that ICRF waves can induce fast convective radial transport of energetic ions in a tokamak geometry without affecting the background ion transport. Spatially inhomogeneous ICRF waves with directional parallel wave vectors are needed; otherwise, a net parallel flow of the energetic ions has to be present. 8 refs.
Date:
February 1, 1990
Creator:
Chang, C.S. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences)
Object Type:
Report
System:
The UNT Digital Library
Simulations of plasma performance in a beam-driven tokamak fusion reactor with Q approx 2-3
Supershot profiles were used to simulate plasmas in a neutral-beam driven tokamak reactor designed to achieve fusion energy production with Q {approx} 2-3. Profiles from a TFTR supershot were scaled to larger radii, density, and electron temperature. The TRANSP code was used to calculate performance of these plasmas. Examples are given of steady-state plasmas with large beam-driven bootstrap currents. The required energy transport rate is comparable to that in TFTR, but the particle transport rate must be less. The PEST code indicates that the plasmas would be MHD stable if the central q{sub {Psi}} can be controlled. 8 refs., 13 figs., 4 tabs.
Date:
February 1, 1990
Creator:
Budny, R.; Jassby, D. L.; Manickam, J.; McCune, D. & Wieland, R.
Object Type:
Report
System:
The UNT Digital Library
Activities and Operations of the Advanced Computing Research Facility : January 1989-January 1990
This report reviews the activities and operations of the Advanced Computing Research Facility (ACRF) for the period January 1, 1989, through January 31, 1990. The ACRF is operated by the Mathematics and Computer Science Division at Argonne National Laboratory. The facility's principal objective is to foster research in parallel computing. Toward this objective, the ACRF continues to operate experimental advanced computers and to sponsor new technology transfer efforts and new research projects.
Date:
February 1990
Creator:
Pieper, Gail W.
Object Type:
Report
System:
The UNT Digital Library
Southwest Retort, Volume 44, Number 2, February 1990
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
February 1990
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
[Letter from Joe B. Grisson to Bruce M. Burton, February 2, 1990]
Photocopy of a letter from Joe B. Grisson, Vice President of NCNB Texas to Bruce M. Burton, Director of Corporate and Foundation Relations, Office of Advancement at the University of North Texas. The letter is in regards to prior correspondence where Burton had invited Grisson to a luncheon for a presentation concerning the North Texas Institute for Educators on the Visual Arts. Enclosed in the letter to Burton, Grisson has included some charitable accounts that might be interested in granting awards to the program as well as a grant application information page.
Date:
February 2, 1990
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Jack Davis and William McCarter to Thomas F. Beech, February 5, 1990]
Photocopy of a letter from Jack Davis and William McCarter, co-directors of North Texas Institute for Educators on the Visual Arts to Thomas F. Beech, executive vice president of the Anne Burnett and Charles D. Tandy Foundation. The letter is in regards to the meeting Davis and McCarter had with Beech hosted by John Stevenson at the Fort Worth Club and how North Texas Institute for Educators on the Visual Arts will be submitting a formal proposal to the trustees of the Tandy Foundation for a four-year grant of $145,000. Attached to the letter is the North Texas Institute for Educators on the Visual Arts proposal to the Tandy Foundation.
Date:
February 5, 1990
Creator:
Davis, Donald Jack
Object Type:
Letter
System:
The UNT Digital Library
[Letter from William A. Hall to Rose Marie Wilkinson, February 9, 1990]
Photocopy of a letter from William A. Hall, assistant to the Chairman, Hallmark Cards, to Rose Marie Wilkinson, executive director of development, University of North Texas. The letter is in regard to correspondence with Mrs. Rein who forwarded Hall the letter of December 8th requesting participating by Hallmark in the Getty Foundation grant. However, Hall Foundations and Hallmark Cards cannot provide assistance with the program.
Date:
February 9, 1990
Creator:
Hall, William A.
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Jack Davis to Robert W. Decker, February 5, 1990]
Photocopy of a letter from Jack Davis, co-director of North Texas Institute for Educators on the Visual Arts to Robert W. Decker, President of the William E. Scott Foundation. The letter is in regards to the possible involvement of the Scott Foundation as a grant award for the North Texas Institute for Educators on the Visual Arts.
Date:
February 5, 1990
Creator:
Davis, Donald Jack
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Jack Davis to Val Wilkie, February 5, 1990]
Photocopy of a letter from Jack Davis, co-director of North Texas Institute for Educators on the Visual Arts to Val Wilkie, executive director for the Sid W. Richardson Foundation. The letter is in regards to the previous correspondence between Wilkie and Davis, where Wilkie gave bad news regarding the grant support from the foundation. In this letter Davis thanks Wilkie for the opportunity and time and will keep him updated on the institutes progress.
Date:
February 5, 1990
Creator:
Davis, Donald Jack
Object Type:
Letter
System:
The UNT Digital Library
Predictive modelling of boiler fouling
The primary objective of this work is the development of a comprehensive numerical model describing the time evolution of fouling under realistic heat exchanger conditions. As fouling is a complex interaction of gas flow, mineral transport and adhesion mechanisms, understanding and subsequently improved controlling of fouling achieved via appropriate manipulation of the various coupled, nonlinear processes in a complex fluid mechanics environment will undoubtedly help reduce the substantial operating costs incurred by the utilities annually, as well as afford greater flexibility in coal selection and reduce the emission of various pollutants. In a more specialized context the numerical model to be developed as part of this activity will be used as a tool to address the interaction of the various mechanisms controlling deposit development in specific regimes or correlative relationships. These should prove of direct use to the coal burning industry.
Date:
February 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Photoinitiated electron transfer in multi-chromophoric species: Synthetic tetrads and pentads
This research project involves the design, synthesis and study of the molecules which mimic many of the important aspects of photosynthetic electron and energy transfer. Specifically, the molecules are designed to mimic the following aspects of natural photosynthetic multistep electron transfer: electron donation from a tetrapyrrole excited singlet state, electron transfer between tetrapyrroles, electron transfer from tetrapyrroles to quinones, and electron transfer between quinones with different redox properties. In addition, they model carotenoid antenna function in photosynthesis (singlet-singlet energy transfer from carotenoid polyenes to chlorophyll) and carotenoid photoprotection from singlet oxygen damage (triplet-triplet energy transfer from chlorophyll to carotenoids).
Date:
February 14, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Soil and Groundwater Pollution Remediation Act
This law was passed by the Republic of China (Taiwan) to protect public health and the environment by preventing soil and groundwater pollution, and by promoting the sustainable use of soil and groundwater.
Date:
February 2, 1990
Creator:
China (Republic : 1949- ). Huan jing bao hu shu.
Object Type:
Text
System:
The UNT Digital Library
Making Things Better: Competing in Manufacturing
This report considers ways to promote the restoration of American leadership in manufacturing technology. Some of the things that most need doing are up to industry— especially in handling people, from managers to engineers to shopfloor workers, and in forming stable, productive relationships between different segments of an industry complex. Government also has a critical role to play.
Date:
February 1990
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library
Critical Connections: Communication for the Future
The U.S. communication infrastructure is changing rapidly as a result of technological advances, deregulation, and an economic climate that is increasingly competitive. This change is affecting the way in which information is created, processed, transmitted, and provided to individuals and institutions. The report analyzes the implications of new communication technologies for business, politics, culture, and individuals, and suggests possible strategies and options for congressional consideration.
Date:
February 1990
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Terry Moore]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story Portrait by reporter Ramona Logan about Terry Moore who volunteers at an Arlington library and other places, offering advice to people who stereotype those with disabilities. This story aired at 5pm.
Date:
February 28, 1990
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[Newspaper: It's my party and I'll run if I want to]
Pages from the Dallas Observer including an article about Greg Witherspoon, his ideologies, and attempts at running for public office.
Date:
February 22, 1990
Creator:
Dallas Observer
Object Type:
Clipping
System:
The UNT Digital Library
[Letter: AIDS Interfaith Network, Inc.]
A letter from the AIDS Interfaith Network in response to the Dallas Parks Director, Frank Wise. The letter addresess the Robert E. Lee Park controversy and the Dallas Morning News article by David Jackson.
Date:
February 2, 1990
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Press release: Post card campaign underway in U.S. Congress]
Press release promoting the NGLTF's post card campaign to Congress members to support the Federal Gay and Lesbian Civil Rights Bill.
Date:
February 6, 1990
Creator:
National Gay and Lesbian Task Force (U.S.)
Object Type:
Text
System:
The UNT Digital Library
[Letter: Massage, Model, Escort advertising]
A letter to Massage, Model, Escort Advertisers from Robert Moore, at the Dallas Voice, notifying the Advertisers that the Voice will no longer print their advertisements until the Voice receives some verification of Massage, Model, Escort Advertisers' legitimacy.
Date:
February 19, 1990
Creator:
Dallas Voice
Object Type:
Letter
System:
The UNT Digital Library
[Press release: World's only gay and lesbian Arab group seeking members]
Press release advertising the Gay and Lesbian Arab Society that is seeking members, especially in the San Francisco area.
Date:
February 6, 1990
Creator:
National Gay and Lesbian Task Force (U.S.)
Object Type:
Text
System:
The UNT Digital Library