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Theoretical study of the structure, energetics, and dynamics of silicon and carbon systems using tight-binding approaches

Description: Semiempirical interatomic potentials are developed for silicon and carbon by modeling the total energy of the system using tight-binding approaches. The parameters of the models were obtained by fitting to results from accurate first-principles Local Density Functional calculations. Applications to the computation of phonons as a function of volume for diamond-structured silicon and carbon and the thermal expansions for silicon and diamond yields results which agree well with experiment. The ph… more
Date: October 25, 1991
Creator: Xu, Chunhui.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Monthly energy review, October 1991. [Contains glossary]

Description: This report presents current data on production, consumption, stocks, imports, exports, and prices of the principal energy commodities in the United States. Also included are data on international production of crude oil, consumption of petroleum products, petroleum stocks, and production of electricity from nuclear-powered facilities. 36 figs., 57 tabs.
Date: October 25, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Iraq-Kuwait: United Nations Security Council Resolutions Test and Votes -- 1991

Description: This report lists the 12 adopted United Nations Security Council resolutions relating to the Iraq-Kuwait situation through October 1991. The texts of these resolutions, along with the votes by members of the Council, are included in this report.
Date: October 25, 1991
Creator: Browne, Marjorie Ann
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fundamental Studies of Water Pretreatment of Coal

Description: During the seventh quarter, water pretreatment experiments were done at lower pressures (1000 psig), with early H{sub 2}O injection or continuous H{sub 2}O injection, and with demineralized coals. In addition, a set of blank experiments was done with all four coals in helium at the following conditions: 350{degrees}C; 4000 psig; 20 minutes. An additional experiment was done with the Zap lignite at atmospheric pressure. Helium was used instead of nitrogen since it can be obtained in highly pure … more
Date: October 25, 1991
Creator: Serio, M. A.; Solomon, P. R.; Kroo, E.; Charpenay, S. & Bassilakis, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Topics in theoretical surface science

Description: The energetics and structures of clean and adsorbate covered surfaces are investigated in this dissertation. First, the formalism, within the Corrected Effective Medium (CEM) method, for calculating the surface energy of a clean surface is derived. The surface energies for many different metals and their low index surfaces are presented. The minimization of the surface energy is then used to predict the multilayer relaxation of the Al(111), (100), Ni(100), (110) and Fe(100) surfaces. Extensions… more
Date: October 25, 1991
Creator: Todd, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical techniques for measurement of high temperatures

Description: The availability of instrumentation to measure the high outlet gas temperature of a particle bed reactor is a topic of some concern. There are a number of possible techniques with advantages and disadvantages. In order to provide some baseline choice of instrumentation, a review has been conducted of these various technologies. This report summarizes the results of this review for a group of technologies loosely defined as optical techniques (excluding optical pyrometry). The review has concent… more
Date: October 25, 1991
Creator: Veligdan, J.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fundamental Studies of Water Pretreatment of Coal. Seventh Quarterly Report, April 1, 1991--June 30, 1991

Description: During the seventh quarter, water pretreatment experiments were done at lower pressures (1000 psig), with early H{sub 2}O injection or continuous H{sub 2}O injection, and with demineralized coals. In addition, a set of blank experiments was done with all four coals in helium at the following conditions: 350{degrees}C; 4000 psig; 20 minutes. An additional experiment was done with the Zap lignite at atmospheric pressure. Helium was used instead of nitrogen since it can be obtained in highly pure … more
Date: October 25, 1991
Creator: Serio, M. A.; Solomon, P. R.; Kroo, E.; Charpenay, S. & Bassilakis, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical techniques for measurement of high temperatures

Description: The availability of instrumentation to measure the high outlet gas temperature of a particle bed reactor is a topic of some concern. There are a number of possible techniques with advantages and disadvantages. In order to provide some baseline choice of instrumentation, a review has been conducted of these various technologies. This report summarizes the results of this review for a group of technologies loosely defined as optical techniques (excluding optical pyrometry). The review has concent… more
Date: October 25, 1991
Creator: Veligdan, J. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiological impact of Par Pond drawdown from liquid effluent pathways

Description: The water level of Par Pond has been lowered over the past several months to reduce the effects in the event of catastrophic dam failure while assessing the condition of the dam and determining if repairs are necessary. In lowering the level of Par Pond, 60 billion liters of water containing low levels of tritium and cesium-137 were discharged to several onsite streams. SRS surface streams flow to the Savannah River. An assessment made to determine the total amount of tritium and Cs-137 dischar… more
Date: October 25, 1991
Creator: Carlton, W. H. & Hamby, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Letter from D. Jack Davis and R. William McCarter to Vicki Rosenberg, October 25, 1991]

Description: A letter from D. Jack Davis and R. William McCarter to Vicki Rosenberg about enclosing copies of the 1991 North Texas Institute for Educators on the Visual Arts Project Report and 1992 Proposal. Attached are the 1991 Report and the 1992 Proposal.
Date: October 25, 1991
Creator: Davis, D. Jack & McCarter, R. William
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
open access

Radiological impact of Par Pond drawdown from liquid effluent pathways

Description: The water level of Par Pond has been lowered over the past several months to reduce the effects in the event of catastrophic dam failure while assessing the condition of the dam and determining if repairs are necessary. In lowering the level of Par Pond, 60 billion liters of water containing low levels of tritium and cesium-137 were discharged to several onsite streams. SRS surface streams flow to the Savannah River. An assessment made to determine the total amount of tritium and Cs-137 dischar… more
Date: October 25, 1991
Creator: Carlton, W. H. & Hamby, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Clipping: No to United Way this year]

Description: An open letter written by David Lott to United Way and published in This Week in Texas; Lott describes how disappointed he is in United Way's lack of involvement in the LGBTQIA+ community during the AIDS crisis.
Date: October 25, 1991
Creator: Lott, David
Item Type: Refine your search to only Clipping
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Adoption Case]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story about laws and steps for adoptions for children.
Date: October 25, 1991
Duration: 13 minutes 43 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Mhmr Psych]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 25, 1991, 6:00 p.m.
Duration: 1 minute 51 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Psych Teens]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 25, 1991, 10:00 p.m.
Duration: 1 minute 55 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: School Follow Up]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 25, 1991, 5:00 p.m.
Duration: 1 minute 45 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Lottery]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 25, 1991, 5:00 p.m.
Duration: 1 minute 38 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Jail Underwear]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 25, 1991, 6:00 p.m.
Duration: 41 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
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