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An Efficient Microwave Power Source: Free-electron Laser Afterburner

Description: A kind of microwave power source, called a free-electron laser afterburner (FEL afterburner) which consists of a free-electron laser buncher and a slow-wave output structure sharing a magnetic wiggler field with the buncher, is proposed. The buncher and the slow-wave structure can operate in either a travelling-wave state or a standing-wave state. In the buncher, the wiggler field together with the radiation field makes an electron beam bunched, and in the slow-wave structure the wiggler field … more
Date: March 4, 1993
Creator: Wang, C. & Sessler, Andrew M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Errors when shock waves interact due to numerical shock width

Description: A simple test problem proposed by Noh, a strong shock reflecting from a rigid wall, demonstrates a generic problem with numerical shock capturing algorithms at boundaries that Noh called excess wall heating.'' We show that the same type of numerical error occurs in general when shock waves interact. The underlying cause is the non-uniform convergence to the hyperbolic solution of the inviscid limit of the solution to the PDEs with viscosity. The error can be understood from an analysis of the a… more
Date: March 4, 1993
Creator: Menikoff, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of advanced NO[sub x] control concepts for coal-fired utility boilers

Description: The complete CombiNO[sub x], process has now been demonstrated at a level that is believed to be representative of a full-scale boiler in terms of mixing capabilities. A summary of the results is displayedin Figure 5-1. While firing Illinois Coal on the Reburn Tower, Advanced Reburning was capable of reducing NO[sub x], by 83 percent. The injection of methanol oxidized 50--58 percent of the existing NO to N0[sub 2]. Assuming that 85 percent of the newly formed N0[sub 2] can be scrubbed in a liq… more
Date: March 4, 1993
Creator: Evans, A.; Pont, J. N.; England, G. & Seeker, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of vanadium-phosphate catalysts for methanol production by selective oxidation of methane

Description: Amax R D will perform laboratory scale development of a promising, practical catalyst for the selective oxidation of methane to methanol. The primary component of this catalyst is vanadium-phosphate (VPO) which has shown good activity and selectivity in the partial oxidation of n-butane and propane but has not been studied in detail for methane oxidation. The goal of the project is to develop a catalyst which allows methane oxidation to methanol to be conducted at high conversion and selectivit… more
Date: March 4, 1993
Creator: McCormick, Robert L. & Jha, Mahesh C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methyl chloride via oxyhydrochlorination of methane

Description: Work to develop a highly selective methyl chloride synthesis catalyst continued, but no stable catalyst with >80% selectivity at 20% methane exists yet. Effort was made on finalizing the pre- engineering scope definition of the Process Demonstration Unit. Natural gas purification, reactor, reactor effluent and MeCl purification, and anhydrous HCl recovery are discussed.
Date: March 4, 1993
Creator: Naasz, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of advanced NO{sub x} control concepts for coal-fired utility boilers. Quarterly technical progress report No. 8, July 1, 1992--September 30, 1992

Description: The complete CombiNO{sub x}, process has now been demonstrated at a level that is believed to be representative of a full-scale boiler in terms of mixing capabilities. A summary of the results is displayed in Figure 5-1. While firing Illinois Coal on the Reburn Tower, Advanced Reburning was capable of reducing NO{sub x}, by 83 percent. The injection of methanol oxidized 50--58 percent of the existing NO to N0{sub 2}. Assuming that 85 percent of the newly formed N0{sub 2} can be scrubbed in a li… more
Date: March 4, 1993
Creator: Evans, A.; Pont, J. N.; England, G. & Seeker, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methyl chloride via oxyhydrochlorination of methane. Final quarterly technical report, July 1, 1992--September 30, 1992

Description: Work to develop a highly selective methyl chloride synthesis catalyst continued, but no stable catalyst with >80% selectivity at 20% methane exists yet. Effort was made on finalizing the pre- engineering scope definition of the Process Demonstration Unit. Natural gas purification, reactor, reactor effluent and MeCl purification, and anhydrous HCl recovery are discussed.
Date: March 4, 1993
Creator: Naasz, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Human cDNA mapping using fluorescence in situ hybridization. Progress report, April 1, 1992--December 31, 1992

Description: Genetic mapping is approached using the techniques of high resolution fluorescence in situ hybridization (FISH). This technology and the results of its application are designed to rapidly generate whole genome as tool box of expressed sequence to speed the identification of human disease genes. The results of this study are intended to dovetail with and to link the results of existing technologies for creating backbone YAC and genetic maps. In the first eight months, this approach generated 60-… more
Date: March 4, 1993
Creator: Korenberg, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Errors when shock waves interact due to numerical shock width

Description: A simple test problem proposed by Noh, a strong shock reflecting from a rigid wall, demonstrates a generic problem with numerical shock capturing algorithms at boundaries that Noh called ``excess wall heating.`` We show that the same type of numerical error occurs in general when shock waves interact. The underlying cause is the non-uniform convergence to the hyperbolic solution of the inviscid limit of the solution to the PDEs with viscosity. The error can be understood from an analysis of the… more
Date: March 4, 1993
Creator: Menikoff, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of vanadium-phosphate catalysts for methanol production by selective oxidation of methane. Quarterly technical progress report No. 1, October--December 1992

Description: Amax R&D will perform laboratory scale development of a promising, practical catalyst for the selective oxidation of methane to methanol. The primary component of this catalyst is vanadium-phosphate (VPO) which has shown good activity and selectivity in the partial oxidation of n-butane and propane but has not been studied in detail for methane oxidation. The goal of the project is to develop a catalyst which allows methane oxidation to methanol to be conducted at high conversion and selectivit… more
Date: March 4, 1993
Creator: McCormick, Robert L. & Jha, Mahesh C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Flag Symbol]

Description: Video footage from the NBC 5/KXAS station in Fort Worth, Texas, to accompany a news story about the meaning in the Star on the Branch Davidian's flag. This story was produced for the 5:00 P.M. news broadcast.
Date: March 4, 1993, 5:00 p.m.
Duration: 1 minute 50 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Human cDNA mapping using fluorescence in situ hybridization

Description: Genetic mapping is approached using the techniques of high resolution fluorescence in situ hybridization (FISH). This technology and the results of its application are designed to rapidly generate whole genome as tool box of expressed sequence to speed the identification of human disease genes. The results of this study are intended to dovetail with and to link the results of existing technologies for creating backbone YAC and genetic maps. In the first eight months, this approach generated 60-… more
Date: March 4, 1993
Creator: Korenberg, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technology development for cobalt F-T catalysts

Description: A computer search of both the open and the patent literature was conducted in order to ascertain the current state of cobalt-based catalyst technology for F-T synthesis. Two series of literature searches were conducted, one dealing specifically with cobalt catalysts for F-T synthesis and the other focusing on the preparation and/or characterization of supported cobalt catalysts including those not used for F-T synthesis. An initial screening of the literature was carried out by examining the 94… more
Date: March 4, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: ATF Press Conference]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story about a standoff between federal agents and Branch Davidians in Waco, Texas following a raid by Alcohol Tobacco and Firearms (ATF) agents. This footage includes a press conference with an unidentified representative from the FBI and ATF agent Dan Conroy speaking about the siege, the release of Davidian children, and the conditions for people still living in the compound. Aerial photography of the Mt. Carm… more
Date: March 4, 1993
Duration: 2 minutes 02 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections

Oral History Interview with Sam Hayes, March 4, 1993

Description: Interview with Sam Hayes, a veteran of the Civilian Conservation Corps from Groveton, Texas. Hayes talks about his childhood, experiences during the Great Depression, and experiences joining and serving the Civilian Conservation Corps.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: March 4, 1993
Creator: Hodges, Ann & Hayes, Sam
Item Type: Refine your search to only Text
Partner: UNT Oral History Program
captions transcript

[News Clip: ATF Protest]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 4, 1993, 5:00 p.m.
Duration: 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: FBI Raid]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story about
Date: March 4, 1993, 6:00 p.m.
Duration: 1 minute 50 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: Richards]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 4, 1993, 10:00 p.m.
Duration: 35 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: ATF Protest]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 4, 1993, 5:00 p.m.
Duration: 50 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: Museum]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 4, 1993, 6:00 p.m.
Duration: 58 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: Fatal House Fire]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 4, 1993, 10:00 p.m.
Duration: 34 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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