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300-MHz optical discriminator-counter
The prediction of future CO/sub 2/ content in the atmosphere is not completely credible because the oceanographers and terrestrial ecologists do not agree on the global CO/sub 2/ balance. Very precise measurements of O/sub 2//N/sub 2/ ratio using Raman scattering over a few years' period could provide important information and lead to the explanation of the disparity in the atmospheric CO/sub 2/ balance. An optical discriminator-counter has been developed to count closely spaced optical events in the few photon level. Simulated optical events as close as 2.5 ns apart had been positively detected by using selected photomultipliers and optimized discriminators. Testing of the optical discriminator-counter was done by using an electrical pulse pair spaced 3 ns apart and also by a similar optical pulse pair generated by fast light-emitting diode. The photomultiplier is capable of counting an average single photoelectron pulse frequency of 50 MHz and has a sensitive detecting area of 50 mm in diameter. The discriminator performance is discussed.
Date:
July 1, 1981
Creator:
Turko, B. & Lo, C.C.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 10, No. 34, Ed. 1 Wednesday, July 1, 1981
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
July 1, 1981
Creator:
Combs, Terrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 10, No. 35, Ed. 1 Wednesday, July 8, 1981
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
July 8, 1981
Creator:
Combs, Terrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 10, No. 36, Ed. 1 Wednesday, July 15, 1981
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
July 15, 1981
Creator:
Combs, Terrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 10, No. 37, Ed. 1 Wednesday, July 22, 1981
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
July 22, 1981
Creator:
Combs, Terrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 10, No. 38, Ed. 1 Wednesday, July 29, 1981
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
July 29, 1981
Creator:
Combs, Terrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Aber House, (north & east (front) elevations)]
Photograph of the Aber House (located at 823 S Bolton) in Jacksonville, Texas.
Date:
July 1, 1981
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Aber House, (south elevation facing NW oblique)]
Photograph of the Aber House (located at 823 S Bolton) in Jacksonville, Texas.
Date:
July 1, 1981
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Aber House, (south & west (rear) elevations)]
Photograph of the Aber House (located at 823 S Bolton) in Jacksonville, Texas.
Date:
July 1, 1981
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Aber House, (View of East (front) elevation)]
Photograph of the Aber House (located at 823 South Bolton) in Jacksonville, Texas.
Date:
July 1981
Creator:
Kleinschmiat, Ulrich
Object Type:
Photograph
System:
The Portal to Texas History
[Aber House, (View of North (side) and East (front) elevations)]
Photograph of the Aber House (located at 823 South Bolton) in Jacksonville, Texas.
Date:
July 1981
Creator:
Kleinschmiat, Ulrich
Object Type:
Photograph
System:
The Portal to Texas History
[Aber House, (View of South (side) elevation, Camera facing Northeast)]
Photograph of the Aber House (located at 823 South Bolton) in Jacksonville, Texas.
Date:
July 1981
Creator:
Kleinschmiat, Ulrich
Object Type:
Photograph
System:
The Portal to Texas History
[Aber House, (View of West (rear) and South (side) elevations, Camera facing Northeast)]
Photograph of the Aber House (located at 823 South Bolton) in Jacksonville, Texas.
Date:
July 1981
Creator:
Kleinschmiat, Ulrich
Object Type:
Photograph
System:
The Portal to Texas History
ACTVE News, Volume 12, Number 7, July 1981
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
July 1981
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[Adolphus Hotel]
Photograph of the Adolphus Hotel (located at 1327 Commerce St) in Dallas, Texas.
Date:
July 1, 1981
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Adolphus Hotel]
Photograph of the Adolphus Hotel (located at 1326 Commerce St) in Dallas, Texas.
Date:
July 1, 1981
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
[Adolphus Hotel]
Photograph of the Adolphus Hotel (located at 1324 Commerce St) in Dallas, Texas.
Date:
July 1, 1981
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
Advanced Fuel Cell Development Progress Report: July-September 1980
Quarterly report discussing fuel cell research and development work at Argonne National Laboratory (ANL). This report describes efforts directed toward (1) investigating alternative concepts for components of molten carbonate fuel cell stacks and (2) improving our understanding of component behavior.
Date:
July 1981
Creator:
Pierce, R. D.; Arons, R. M.; Dusek, J. T.; Fraioli, A. V.; Kucera, G. H.; Poeppel, R. B. et al.
Object Type:
Report
System:
The UNT Digital Library
Advanced Selenide Thermoelectric Development Program. Final Report
The primary objective of this work was to demonstrate that copper silver selenide and TAGS could be segmented. The hot junction temperature was planned to be 725/sup 0/C with the segmentation temperature at 400/sup 0/C, both temperatures were selected to prevent excessive sublimation from the hot ends of the segments, respectively. The program was planned as a cooperative effort between General Atomic company and Teledyne Energy Systems. Accordingly, General Atomic synthesized the CuAgSe that was used to fabricate the test hardware that was ultimately delivered to General Atomic for testing. Both the CuAgSe and TAGS were hot pressed in an argon atmosphere then the segments were furnace-bonded to each other. A secondary objective was to produce CuAgSe powder by rapid solidification.
Date:
July 20, 1981
Creator:
Seetoo, W. R.
Object Type:
Report
System:
The UNT Digital Library
Aerial Gamma Ray and Magnetic Survey, Final Report: Columbus Quadrangle, Ohio
Final report analyzing aerial gamma ray and magnetic data in the Columbus quadrangle, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.
Date:
July 1981
Creator:
EG & G GeoMetrics
Object Type:
Report
System:
The UNT Digital Library
Aerial Gamma Ray and Magnetic Survey, Final Report: Detroit Quadrangle, Michigan
Final report analyzing aerial gamma ray and magnetic data in the Detroit quadrangle, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.
Date:
July 1981
Creator:
EG & G GeoMetrics
Object Type:
Report
System:
The UNT Digital Library
Aerial Gamma Ray and Magnetic Survey, Final Report: Manitowoc and Traverse City Quadrangles, Wisconsin/Michigan
Final report analyzing aerial gamma ray and magnetic data in the Manitowoc and Traverse City quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.
Date:
July 1981
Creator:
EG & G GeoMetrics
Object Type:
Report
System:
The UNT Digital Library
Aerial Gamma Ray and Magnetic Survey, Final Report: Milwaukee and Midland Quadrangles, Wisconsin/Michigan
Final report analyzing aerial gamma ray and magnetic data in the Milwaukee and Midland quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.
Date:
July 1981
Creator:
EG & G GeoMetrics
Object Type:
Report
System:
The UNT Digital Library
Aerial Gamma Ray and Magnetic Survey, Final Report: Racine and Grand Rapids Quadrangles, Michigan/Wisconsin/Illinois
Final report analyzing aerial gamma ray and magnetic data in the Racine and Grand Rapids quadrangles, including a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.
Date:
July 1981
Creator:
EG & G GeoMetrics
Object Type:
Report
System:
The UNT Digital Library