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Flow Enhancement of Annulus Damping (open access)

Flow Enhancement of Annulus Damping

Significant increases in flow damping were observed for a tube passing through a plate when a sharp-edge raised-diameter constriction was added to the hole in a plate subject to a constant pressure drop. A correlation of the data in the form of a concentrated viscous damper (dashpot) is given which will be useful in structural dynamic analysis.
Date: April 1986
Creator: Mulcahy, T. M.
Object Type: Report
System: The UNT Digital Library

[Photograph 2012.201.B0144.0170A]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Peggy Jones, activity director at Four seasons Nursing Home, 2900 Parklawn, Midwest City, releases Sam Cornelius, a nursing home physician, from a makeshift jail at the home."
Date: April 16, 1986
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0147.0453]

Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date: April 4, 1986
Creator: Argo, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0161.0004]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Fred Myers, director of the Gilcrease Museum in Tulsa Marion and John DeVore and Mary Frances Myers, from left, bottom photo, admire a painting from the "Oklahoma Treasures" Collection, which will be on display in Oklahoma city trough May 30."
Date: April 17, 1986
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0156.0228]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Edward J. DeBartolo, left, is greeted by state Senate leader Rodger Randle and Gov. George Nigh during a fete Wednesday night for DeBartolo."
Date: April 30, 1986
Creator: Hoke, Doug
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0138.0813]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jane Coker, right, signs a letter of intent while Stephanie Findley and Ben Sasser watch."
Date: April 7, 1986
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0155.0670]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gary Dean chases down a calf in Friday's 89er Days competition ."
Date: April 18, 1986
Creator: Hellstern, Paul
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0152.0666]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Cheryl Hewett, Bushra Dahr and Lily Hummel, from left were some of the hostesses for the Cajun luncheon"
Date: April 4, 1986
Creator: Southerland, Paul B.
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0152.0871]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Anne and Ed Dalton, Lida Elkins and Betsy White, from left, are party guests."
Date: April 15, 1986
Creator: Hoke, Doug
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0156.0218]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Edward J. DeBartolo. . . honored at banquet."
Date: April 30, 1986
Creator: Hoke, Doug
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0156.0613]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Judy Duffy, Left, Joyce Collins display a handsome quilt that will be given away during Sunday's Deer Creek Farm Tour."
Date: April 8, 1986
Creator: Argo, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0151.0562]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Duane Dahlgren , Mrs. Jack Dahlgren , Patricia Reynolds and Jack Dahlgren , from left, talk at the cocktail party honoring Patricia and Duane.."
Date: April 19, 1986
Creator: Wilson, George R.
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0156.0223]

Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date: April 30, 1986
Creator: Hoke, Doug
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0137.0133]

Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date: April 18, 1986
Creator: Cook, J. Don
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0141.0385]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Una Conover, left, Barbara Naranche, director for field services, Redland Corinal Girl Scouts."
Date: April 24, 1986
Creator: Klock, Roger
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0143.0211]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jay Cooper believes hospital food should be a treat, not something to dread."
Date: April 1, 1986
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0146.0173]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Lynn Cowan, Taco Bueno marketing executive from Dallas says Oklahomans are among America's top consumers of fast food, and Taco Bueno is getting its share of the business."
Date: April 22, 1986
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0147.0455]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mike Boudreau, left, of Durant, and instructor Joe Craig work on a rifle."
Date: April 4, 1986
Creator: Argo, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0141.0387]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Una Conover. left, receives a 50-year pin from Barbara Naranche, director of field services for the Redland Council of Girl Scouts of America."
Date: April 24, 1986
Creator: Klock, Roger
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0141.0196]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Tobi Conley"
Date: April 14, 1986
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0147.0452]

Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date: April 4, 1986
Creator: Argo, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0136.0666]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mary and Dick Clements, top photo, fill their plates with fruit at the Oklahoma Art Center reception."
Date: April 17, 1986
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History
Operational experience with SLAC energy upgrade (open access)

Operational experience with SLAC energy upgrade

To produce energies of over 50 GeV for SLC, all klystron stations on the accelerator are being upgraded to produce 250 MeV energy contribution per station. This involves installing new, higher power, longer pulse klystrons, upgrading klystron modulators to provide these higher voltage, longer klystron beam pulses, and a new interlock and protection system. A new VAX based diagnostic system including automated microwave measurements, klystron beam monitors, and modulator performance checks is being implemented. Figure 1 shows a block diagram of the klystron-modulator system. To date, over half of the new klystrons have been installed and tested, the modulator upgrade program has converted 22 sectors (8 stations each) of modulators out of 30, and a four sector sampling of klystrons has been run at full SLC specs, namely 350 kV beam voltage, 3.5 microsecond pulse duration, peak output power in excess of 60 MW, and PRF of 120 pps. This paper discusses the klystron design, modulator design, interlock and diagnostic systems, and the results of the initial operation.
Date: April 1, 1986
Creator: Allen, M. A.; Cassel, R. L.; Dean, N. R.; Konrad, G. T.; Koontz, R. F.; Schwarz, H. D. et al.
Object Type: Article
System: The UNT Digital Library
Bombardment-Induced Segregation and Redistribution (open access)

Bombardment-Induced Segregation and Redistribution

During ion bombardment, a number of processes can alter the compositional distribution and microstructure in near-surface regions of alloys. The relative importance of each process depends principally on the target composition, temperature, and ion characteristics. In addition to displacement mixing leading to a randomization of atomic locations, and preferential loss of alloying elements by sputtering, which are dominant at relatively low temperatures, several thermally-activated processes, including radiation-enhanced diffusion, radiation-induced segregation and Gibbsian adsorption, also play important roles. At elevated temperatures, nonequilibrium point defects induced by ion impacts become mobile and tend to anneal out by recombination and diffusion to extended sinks, such as dislocations, grain boundaries and free surfaces. The high defect concentrations, far exceeding the thermodynamic equilbrium values, can enhance diffusion-controlled processes, while persistent defect fluxes, originating from the spatial non-uniformity in defect production and annihilation, give rise to local redistribution of alloy constituents because of radiation-induced segregation. Moreover, when the alloy is maintained at high temperature, Gibbsian adsorption, driven by the reduction in free energy of the system, occurs even without irradiation; it involves a compositional perturbation in a few atom layers near the alloy surface. The combination of these processes leads to the complex development of a …
Date: April 1, 1986
Creator: Lam, N. Q. & Wiedersich, H.
Object Type: Article
System: The UNT Digital Library