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644 Matching Results
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Novel, convenient, and nonpersistent radiotracer for environmental and energy applications
A newly-available radioisotopic system, /sup 172/Hf-/sup 172/Lu, has excellent potential for tracer applications in which nuclear data acquisition must be accomplished in real time. The 6.7-day half-life of /sup 172/Lu is sufficient for a large fraction of tracer experiments, and should allow the direct incorporation of /sup 172/Lu into tests that have traditionally utilized much longer-lived radionuclides. Since /sup 172/Lu is the daughter component of a radioisotope generator, however, its effective shelf-life is determined by the half-life of its 1.9-year /sup 172/Hf parent. Consequently, the frequency of isotope procurement need not be any more extensive than investigators would normally be accustomed to. Discussion relevant to isotope production, generator operation, and nuclide acquisition is presented in this paper.
Date:
March 12, 1984
Creator:
Grant, P.M.
Object Type:
Article
System:
The UNT Digital Library
(Investigation of low-cost solar cells based on Cu/sub 2/O). Third quarterly progress report, November 1, 1979-January 31, 1980
Efforts this quarter concentrated on completion and check-out of the MBE system, deposition of ZnS films, analysis of the internal photoresponse for Cu-Cu/sub 2/O cells, and fabrication and characterization of Cu-Cu/sub 2/O solar cells. In-doped ZnS films with very good optical quality and finite conductivity were obtained by co-depositing In and ZnS. Analysis of the internal photoresponse indicated that minority carrier diffusion lengths on the order of 10 ..mu..m are being achieved with the present Cu/sub 2/O growth procedure. Active area values of J/sub PH/ = 8.52 mA/cm/sup 2/ and AM1 Efficiency = 1.76% were achieved for Cu-Cu/sub 2/O cells. These devices appear to have an MIS structure, or fixed charge at the interface. In particular, analysis of I-V data indicates that the current-voltage characteristics for applied voltages greater than 0.3 V are characterized by n approx. = 1 and J/sub 0/ approx. = 2 x 10/sup -9/ mA/cm/sup 2/, which implies an effective barrier height of 0.94 eV compared to the theoretical value of 0.7 eV for a Cu/Cu/sub 2/O Schottky barrier. Another very significant achievement this past quarter was the development of a surface preparation procedure which results in a nearly perfect stochiometry at the surface.
Date:
March 12, 1980
Creator:
Olsen, L. C.
Object Type:
Report
System:
The UNT Digital Library
At-sea test validation data needed to verify the NOAA/DOE CWP Analytic Code
Test data requirements are developed in this memorandum for the one-third scale Ocean Thermal Energy Conversion (OTEC) cold water pipe (CWP) at-sea tests. A major goal of the at-sea tests is to collect sufficient data so that the National Oceanic and Atmospheric Administration (NOAA)/Department of Energy (DOE) CWP Analytic Code can be validated. The code is examined to determine the individual responses requiring verification. The wave environment is then considered for prototype survival and the scaled test. The expected response of the OTEC CWP test article in the test environment is used to form a basis of the test plan. Requirements for the tests of standard configurations of the OTEC CWP test system are first planned followed by requirements for tests of alternate configurations and evolutions. The final product is a set of justified NOAA/CWP analytic code validation requirements.
Date:
March 12, 1980
Creator:
Major, R. A.
Object Type:
Report
System:
The UNT Digital Library
Massachusetts State Briefing Book for low-level radioactive waste management
The Massachusetts State Briefing Book is one of a series of State briefing books on low-level radioactive waste management practices. It has been prepared to assist State and Federal agency officials in planning for safe low-level radioactive waste disposal. The report contains a profile of low-level radioactive waste generators in Massachusetts. The profile is the result of a survey of NRC licensees in Massachusetts. The briefing book also contains a comprehensive assessment of low-level radioactive waste management issues and concerns as defined by all major interested parties including industry, government, the media, and interest groups. The assessment was developed through personal communications with representatives of interested parties, and through a review of media sources. Lastly, the briefing book provides demographic and socioeconomic data and a discussion of relevant government agencies and activities, all of which may impact waste management practices in Massachusetts.
Date:
March 12, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
ZONE - a finite element mesh generator. [2-D, for CDC 7600]
The ZONE computer program is a finite element mesh generator that produces the nodes and element description of any two-dimensional geometry. The geometry is subdivided into a mesh of quadrilateral and triangular zones arranged sequentially in an ordered march through the geometry. The order of march can be chosen so that the minimum bandwidth is obtained. The node points are defined in terms of the x and y coordinates in a global rectangular coordinate system. The zones generated are quadrilaterals or triangles defined by four node points in a counterclockwise sequence. Node points defining the outside boundary are generated for slide lines and to describe pressure boundary conditions. The mesh that is generated can be used as input to any two dimensional as well as any axisymmetrical structure program. The following points are taken up: program concept and characteristics; regions; layers; meridians (offset, circular arc, ellipse); rays; common characterstics - rays and meridians, ZONE input description; output files; examples; and program availability. Also generated is the input to the program PLOT. 15 figures. (RWR)
Date:
March 12, 1980
Creator:
Burger, M.J.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0144.0277]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Frank Cornwell, a member of the Mid-America Kiwanis Club, makes an emission check on an auto exhaust as a service of the club and the American Lung Association of Oklahoma."
Date:
March 12, 1981
Creator:
Buehner, Jeff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0353]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "But Benny Coleman won't be out in the fresh air playing softball or tennis."
Date:
March 12, 1980
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0434]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 12, 1984
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0611]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mike Daugherty of Oklahoma City rolled a perfect game at Bowling Green II Thursday night and shares the top spot in this week's Bowling Honor Roll with Jerry Meeley, who rolled a 300 at Moor bowl Friday night."
Date:
March 12, 1988
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0618]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Philip Cloud checks the controls on an energy conservation simulator at Central State University's Energy Week Fair in Edmond."
Date:
March 12, 1981
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0446]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Paul G. Darrough Sr. and granddaughter Terry Langley admire his state tennis trophies."
Date:
March 12, 1981
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0605]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "It was a Spring Fling!"
Date:
March 12, 1983
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0027]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 12, 1980
Creator:
Grier, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0139.0356]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "All-Stater Benny Coleman does some warm-ups during a freestyle wrestling clinic at Northwest High School."
Date:
March 12, 1980
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0350.0501]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "CHRISTY LAMBERTSON (PC NORTH)."
Date:
March 12, 1988
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0271.0494]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The Athletics Congress (TAC), the governing body for U. S. track and field, will operate a training camp in Davos, Switzerland, this summer for U. S. Olympians competing in Europe."
Date:
March 12, 1988
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0581]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Rehearsing a Handel work are Fred Haley, seated at harpsichord, music director Don Jensen, left, and soprano soloist Ida Huber."
Date:
March 12, 1985
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0338.0044]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Barbara Kernke encourages friend Kory Haigh, 7, in his artistic endeavors during their weekly session. Mrs. Kernke is among the eight Junior League volunteers involved in an adult and child interaction program called "Magic Moments" at Britton Elementary School."
Date:
March 12, 1981
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0422]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 12, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0251.0490]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Toy Harrison proudly displays his boxing awards."
Date:
March 12, 1980
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0261B.0345]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 12, 1980
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0328.0329]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Aziz Khan explains the squash tournament pairings to Liz White."
Date:
March 12, 1982
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0251.0241]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Harvest Hills principal Bill Spaeth helps Jonna Dyer, left, and Aubrey Hooper plant a tree."
Date:
March 12, 1987
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0352.0270]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 12, 1981
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History