Partner
UNT Libraries Special Collections
119
UNT Libraries Government Documents Department
91
Oklahoma Historical Society
60
Rosenberg Library
29
Texas Parks & Wildlife Department
5
Hoston History Research Center at Houston Public Library
4
Lockheed Martin Aeronautics Company, Fort Worth
4
Hardin-Simmons University Library
3
Moody Medical Library, UT
3
Private Collection of Mike Cochran
3
10 More
Collection
KXAS-NBC 5 News Collection
112
Office of Scientific & Technical Information Technical Reports
64
Oklahoma Publishing Company Photography Collection
30
Preston George Collection
30
Harris and Eliza Kempner
29
Defense Base Closure and Realignment Commission
14
Technical Report Archive and Image Library
12
Texas Digital Newspaper Program
8
Abilene Library Consortium
6
Battleship Texas Newspaper Collection
5
28 More
Country
States
Decade
Month
Day
Language
Results:
1 - 24 of
335
next
Fixed tilt solar collector employing reversible vee-trough reflectors and vacuum tube receivers for solar heating and cooling systems. Final report. JPL Publication 77-78
The objective of the Vee-Trough/Vacuum Tube Collector (VTVTC) Project was to prove the usefulness of vee-trough concentrators in improving the efficiency and reducing the cost of collectors assembled from evacuated tube receivers. The VTVTC was analyzed rigorously and various mathematical models were developed to calculate the optical performance of the vee-trough concentrator and the thermal performance of the evacuated tube receiver. A test bed was constructed to verify the mathematical analyses and compare reflectors made out of glass, Alzak and aluminized FEP Teflon. Tests were run at temperatures ranging from 95 to 180/sup 0/C during the months of April, May, June, July and August 1977. Vee-trough collector efficiencies of 35 to 40% were observed at an operating temperature of about 175/sup 0/C. Test results compared well with the calculated values. Test data covering a complete day are presented for selected dates throughout the test season. Predicted daily useful heat collection and efficiency values are presented for a year's duration at operation temperatures ranging from 65 to 230/sup 0/C. Estimated collector costs and resulting thermal energy costs are presented. Analytical and experimental results are discussed along with a complete economic evaulation. Recommendations for the continuation of the project are presented.
Date:
December 1, 1977
Creator:
Selcuk, M. K.
Object Type:
Report
System:
The UNT Digital Library
Evaluation and verification of epitaxial process sequence for silicon solar-cell production. Final program summary report
Progress, present status, and data are presented for work in the areas of silicon substrate materials epitaxial substrates and epitaxial growth and of solar cells production process sequence determination especially, and also in the areas of process specification, minimodule design, process and design verification, and cost evaluation and projections. (LEW)
Date:
November 1, 1981
Creator:
Redfield, D.
Object Type:
Report
System:
The UNT Digital Library
Helical Screw Expander Evaluation Project. Final report
A functional 1-MW geothermal electric power plant that featured a helical screw expander was produced and then tested in Utah in 1978 to 1979 with a demonstrated average performance of approximately 45% machine efficiency over a wide range of test conditions in noncondensing operation on two-phase geothermal fluids. The Project also produced a computer-equipped data system, an instrumentation and control van, and a 1000-kW variable load bank, all integrated into a test array designed for operation at a variety of remote test sites. Additional testing was performed in Mexico in 1980 under a cooperative test program using the same test array, and machine efficiency was measured at 62% maximum with the rotors partially coated with scale, compared with approximately 54% maximum in Utah with uncoated rotors, confirming the importance of scale deposits within the machine on performance. Data are presented for the Utah testing and for the noncondensing phases of the testing in Mexico. Test time logged was 437 hours during the Utah tests and 1101 hours during the Mexico tests.
Date:
March 1, 1982
Creator:
McKay, R.
Object Type:
Report
System:
The UNT Digital Library
Development of alternative oxygen production source using a zirconia solid electrolyte membrane
The objective of this multiyear effort was the development, fabrication and testing of a zirconia oxygen production module capable of delivering approximately 100 liters/minute (LPM) of oxygen. The work discussed in this report consists of development and improvement of the zirconia cell along with manufacture of cell components, preliminary design of the final plant, additional economic analysis and industrial participation. (VC)
Date:
August 1, 1990
Creator:
Suitor, J. W.; Clark, D. J. & Losey, R. W.
Object Type:
Report
System:
The UNT Digital Library
Direct Conversion Technology
The overall objective of the Direct Conversion Technology task is to develop an experimentally verified technology base for promising direct conversion systems that have potential application for energy conservation in the end-use sectors. Initially, two systems were selected for exploratory research and advanced development. These are Alkali Metal Thermal-to-Electric Converter (AMTEC) and Two-Phase Liquid Metal MD Generator (LMMHD). This report describes progress that has been made during the first six months of 1992 on research activities associated with these two systems. (GHH)
Date:
July 1, 1992
Creator:
Back, L.H.; Fabris, G. & Ryan, M.A.
Object Type:
Report
System:
The UNT Digital Library
Letter from Dale Benedetti to Commissioner Bilbray
Community Correspondence - Letter from Dale Benedetti to Commissioner Bilbray regarding Pt. Mugu Naval Air Base in California.
Date:
September 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Executive Correspondence - From Congress Member Anna G. Eshoo, To Chairman Principi
Executive Correspondence - From Congress Member Anna G. Eshoo, To Chairman Principi
Date:
August 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Photograph 2012.201.B0413.0156]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "A Texas oil millionaire Monday night spent $125,000 on a party to prove that Texans can be genteel."
Date:
January 1, 1957
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Executive Correspondence - From Congress Member Anna G. Eshoo, To Jim Hansen, Commissioner
Executive Correspondence - From Congress Member Anna G. Eshoo, To Jim Hansen, Commissioner
Date:
August 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Executive Correspondence - From Congress Member Anna G. Eshoo, To General James T. Hill, Commissioner
Executive Correspondence - From Congress Member Anna G. Eshoo, To General James T. Hill, Commissioner
Date:
August 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Executive Correspondence - From Congress Member Anna G. Eshoo, To Commissioner Coyle
Executive Correspondence - From Congress Member Anna G. Eshoo, To Commissioner Coyle
Date:
August 1, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Photograph 2012.201.B0051.0904]
Photograph taken for a story in the Oklahoma City Times newspaper. Caption: "The wreckage of a DC-10 jetliner sits on Los Angeles runway after it crashed on takeoff."
Date:
March 1, 1978
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0316.0041]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Vicky Drake, Stanford University coed running for president of the student body, is taking no chances on her assets going unnoticed as she tacks up one of many posters of herself, clothed only in a smile."
Date:
May 1, 1968
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Script: Sirhan]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story. This story aired at 6pm.
Date:
April 1, 1969, 6:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: International News]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story. This story aired at 6:30am.
Date:
April 1, 1969, 6:30 a.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: Sirhan]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story. This story aired at 10pm.
Date:
April 1, 1969, 10:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: Washington Report]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
May 1, 1969, 10:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: Mayor elections]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story. This story aired at 12am.
Date:
1969-04-01T24:00:00
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: Tregoff]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
1969-05-01T24:00:00
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
Dual arm master controller development
The advanced servomanipulator (ASM) slave was designed with an anthropomorphic stance, gear/torque tube power drives, and modular construction. These features resulted in increased inertia, friction, and backlash relative to tape-driven manipulators. Studies were performed which addressed the human factors design and performance trade-offs associated with the corresponding master controller best suited for the ASM. The results of these studies, as well as the conceptual design of the dual arm master controller, are presented. This work was performed as part of the Consolidated Fuel Reprocessing Program at the Oak Ridge National Laboratory. 5 refs., 7 figs., 1 tab.
Date:
January 1, 1985
Creator:
Kuban, D. P. & Perkins, G. S.
Object Type:
Article
System:
The UNT Digital Library
Low Energy X-Ray Spectra Measured With a Mercuric Iodide Energy Dispersive Spectrometer in a Scanning Electron Microscope
A mercuric iodide energy dispersive x-ray spectrometer, with Peltier cooling provided for the detector and input field effect transistor, has been developed and tested in a scanning electron microscope. X-ray spectra were obtained with the 15 keV electron beam. An energy resolution of 225 eV (FWHM) for Mn-K/sub ..cap alpha../ at 5.9 keV and 195 eV (FWHM) for Mg-K line at 1.25 keV has been measured. Overall system noise level was 175 eV (FWHM). The detector system characterization with a carbon target demonstrated good energy sensitivity at low energies and lack of significant spectral artifacts at higher energies. 16 refs., 5 figs.
Date:
January 1, 1985
Creator:
Iwanczyk, J. S.; Dabrowski, A. J.; Huth, G. C.; Bradley, J. G.; Conley, J. M. & Albee, A. L.
Object Type:
Article
System:
The UNT Digital Library
Refractory materials for high-temperature thermoelectric energy conversion
Theoretical work of two decades ago adequately explained the transport behavior and effectively guided the development of thermoelectric materials of high conversion efficiencies of conventional semiconductors (e.g., SiGe alloys). The more significant contributions involved the estimation of optimum doping concentrations, the reduction of thermal conductivity by solid solution doping and the development of a variety of materials with ZT approx. 1 in the temperature range 300 K to 1200 K. It was also shown that ZT approx. 1 is not a theoretical limitation although, experimentally, values in excess of one were not achieved. Work has continued with emphasis on higher temperature energy conversion. A number of promising materials have been discovered in which it appears that ZT > 1 is realizable. These materials can be divided into two classes: (i) the rare-earth chalcogenides, which behave as itinerant highly-degenerate n-type semiconductors at room-temperature, and (ii) the boron-rich borides, which exhibit p-type small-polaronic hopping conductivity.
Date:
January 1, 1983
Creator:
Wood, C. & Emin, D.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0305B.235]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Parnelli Jones, who came within a whisker of winning the Indianapolis 500 in his controversial turbine-powered car two years ago."
Date:
September 1, 1967
Creator:
Brown, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Script: Oilman Faces Extradition]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about Eugene M. Shirley being extradited from Texas to California to faces charges for selling oil leases without a permit.
Date:
August 1, 1956
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library