Tertiary Stratigraphy of Highly Extended Terranes, California, Arizona, and Nevada (open access)

Tertiary Stratigraphy of Highly Extended Terranes, California, Arizona, and Nevada

Proceedings of a workshop held in February 1990 called "Tertiary Stratigraphy of Highly Extended Terranes, Southern Basin and Range" at the Desert Research Center of the California State University System, Soda Springs, near Baker, California. This volume is a collection of stratigraphic data and interpretation.
Date: 1993
Creator: Sherrod, David R. & Nielson, Jane E.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation (open access)

Surfactant studies for bench-scale operation

A phase II study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the second quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs with Illinois No. 6 coal at processing temperatures of 300, 325, and 350[degrees]C, and pressures of 1800 psig, (2) analysis of the filter cake and the filtrate obtained from the treated slurry in each run, and (3) correlation of the coal conversions and the liquid yield quality to the surfactant concentration. An increase in coal conversions and upgrading of the liquid product quality due to surfactant addition was observed for all runs.
Date: January 15, 1993
Creator: Hickey, G.S. & Sharma, P.K.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Second quarterly technical progress report, October 1, 1992--December 31, 1992 (open access)

Surfactant studies for bench-scale operation. Second quarterly technical progress report, October 1, 1992--December 31, 1992

A phase II study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the second quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs with Illinois No. 6 coal at processing temperatures of 300, 325, and 350{degrees}C, and pressures of 1800 psig, (2) analysis of the filter cake and the filtrate obtained from the treated slurry in each run, and (3) correlation of the coal conversions and the liquid yield quality to the surfactant concentration. An increase in coal conversions and upgrading of the liquid product quality due to surfactant addition was observed for all runs.
Date: January 15, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
System Software and Tools for High Performance Computing Environments: A report on the findings of the Pasadena Workshop, April 14--16, 1992 (open access)

System Software and Tools for High Performance Computing Environments: A report on the findings of the Pasadena Workshop, April 14--16, 1992

The Pasadena Workshop on System Software and Tools for High Performance Computing Environments was held at the Jet Propulsion Laboratory from April 14 through April 16, 1992. The workshop was sponsored by a number of Federal agencies committed to the advancement of high performance computing (HPC) both as a means to advance their respective missions and as a national resource to enhance American productivity and competitiveness. Over a hundred experts in related fields from industry, academia, and government were invited to participate in this effort to assess the current status of software technology in support of HPC systems. The overall objectives of the workshop were to understand the requirements and current limitations of HPC software technology and to contribute to a basis for establishing new directions in research and development for software technology in HPC environments. This report includes reports written by the participants of the workshop`s seven working groups. Materials presented at the workshop are reproduced in appendices. Additional chapters summarize the findings and analyze their implications for future directions in HPC software technology development.
Date: April 1, 1993
Creator: Sterling, T.; Messina, P. & Chen, M.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Third quarterly technical progress report, January 1, 1993--March 31, 1993 (open access)

Surfactant studies for bench-scale operation. Third quarterly technical progress report, January 1, 1993--March 31, 1993

A phase 11 study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of, quantifying the enhancement in liquid yields and product quality. This report covers the third quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs and related analysis with Illinois {number_sign}6 coal at a processing temperature of 375{degree}C, and pressures of 1800 and 1500 psig, (2) completion and analysis of two autoclave reactor runs to observe the synergistic effect of the surfactant and an iron catalyst, and (3) setting up a subcontract with HRI Inc. to test the surfactant enhanced liquefaction process in a continuous flow reactor.
Date: April 20, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
Nuclear electric propulsion for future NASA space science missions (open access)

Nuclear electric propulsion for future NASA space science missions

This study has been made to assess the needs, potential benefits and the applicability of early (circa year 2000) Nuclear Electric Propulsion (NEP) technology in conducting NASA science missions. The study goals are: to obtain the performance characteristics of near term NEP technologies; to measure the performance potential of NEP for important OSSA missions; to compare NEP performance with that of conventional chemical propulsion; to identify key NEP system requirements; to clarify and depict the degree of importance NEP might have in advancing NASA space science goals; and to disseminate the results in a format useful to both NEP users and technology developers. This is a mission performance study and precludes investigations of multitudes of new mission operation and systems design issues attendant in a NEP flight.
Date: July 20, 1993
Creator: Yen, Chen-wan L.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Fourth quarterly technical progress report, April 1, 1993--June 30, 1993 (open access)

Surfactant studies for bench-scale operation. Fourth quarterly technical progress report, April 1, 1993--June 30, 1993

A phase 2 study has been initiated to investigate surfactant- assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the fourth quarter of work. The major accomplishments were (1) Completion of coal liquefaction autoclave reactor runs and related analysis with Illinois {number_sign}6 coal with time as a variable at 375{degree}C, and pressures of 1800 psig; (2) an investigation into the mechanism of the effect that the lignosulfonate surfactant has in enhancing liquefaction yields; and (3) completion of a bench-scale test with the surfactant in the continuous flow Catalytic Two Stage Liquefaction Process (CTSL) reactor at HRI.
Date: July 23, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
Design considerations for a fiber optic communications network for power systems (open access)

Design considerations for a fiber optic communications network for power systems

The design of a fiber optic communication network for monitoring and control in power systems is discussed. It is shown that by appropriate choice of protocols, a fault-tolerant system can be built that operates in any arbitrary configuration. Since the network is based on fiber optics, it can be made fast enough for substation monitoring and control. In this application, a relatively small number of cables is required to implement a high reliability system. The network can also be used for distribution automation. In this application the network is required to reach all parts of the power system, and the fiber cable itself becomes a significant fraction of the cost of communications. However, since many applications can be supported at once, the cost per function can be reasonable.
Date: August 1, 1993
Creator: Kirkham, H.; Johnston, A. R. & Allen, G. D.
Object Type: Article
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Fifth quarterly technical progress report: July 1, 1993--September 30, 1993 (open access)

Surfactant studies for bench-scale operation. Fifth quarterly technical progress report: July 1, 1993--September 30, 1993

A phase II study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the fifth quarter of work. The major accomplishments were: (1) Completion of coal liquefaction autoclave reactor runs and related analysis with Illinois no. 6 coal at 400{degrees}C with and without surfactant and/or catalyst at pressures of 1700 psig; (2) A literature search into the effect that lignin has in the coprocessing of coal; and (3) Presentation of a report summarizing the first year of work on this task at the Annual Liquefaction Contractors Review Conference. Results from this quarter show that lignosulfonate surfactant continues to increase overall MAF conversion of Illinois no. 6 coal at temperatures up to 400{degrees}C and produces an improvement in light boiling fraction distillate over the base case of no surfactant addition.
Date: October 22, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
The study of redox-active inorganic substituents of cellulase enzymes. Quarterly report, 25 August--25 November 1993 (open access)

The study of redox-active inorganic substituents of cellulase enzymes. Quarterly report, 25 August--25 November 1993

Cellulase (CBHI) was modified by bis (2,2- bipyridine) ruthenium (II) and the modified enzyme was assayed for cellulase activity using p- nitrophenyl beta-D-cellobioside as substrate. Absorption spectroscopy of native and modified CBHI was also conducted.
Date: December 31, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library