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Repair Welding of Fusion Reactor Components (open access)

Repair Welding of Fusion Reactor Components

Recent experimental investigations indicate that the repair welding of irradiated materials containing greater than 1 to 2.5 appm helium leads to catastrophic cracking in the heat affected zone of the weld. The high temperatures and cooling tensile stresses which occur during the welding process lead to enhanced helium bubble growth in the heat affected zone region, resulting in catastrophic cracking upon cooling. An investigation is proposed which seeks to determine the effect of stress state on the helium bubble growth process and develop engineering modifications to the welding process based upon this understanding in an attempt to alleviate or eliminate the weld cracking problem in type 316 stainless steel materials.
Date: May 20, 1992
Creator: Chin, Bryan A.
Object Type: Report
System: The UNT Digital Library
Computed and experimental interactions between eddy structure and dispersed particles in developing free shear layers (open access)

Computed and experimental interactions between eddy structure and dispersed particles in developing free shear layers

We are investigating the interactive process between turbulent flow and dispersed phase particles. We are focusing on the mechanisms that appear to result in a reduction of local turbulent intensity and a corresponding reduction in wall heat transfer and subsequent wall erosion in turbulent solid propellant combustion flow. We apply computational simulations and physical experiments specialized to a developing free shear layer over a rearward facing step and over a parallel splitter plate. The flow configuration evolves in a two-dimensional, steady, combustion and non-combustion turbulent free shear mixing region, with and without particle additives. The computational simulations combine three basic components: gas phase Navier-Stokes solutions, Lagrange particle field solutions and a Monte Carlo technique for the random encounters, forces and accelerations between the two fields. We concentrate here on relatively large sized additive particles (of the order of tens of microns to 100 microns mean diameter). We examine their apparent influence in breaking up the larger, energy bearing eddy structures into smaller structures which are more readily dissipated.
Date: May 20, 1982
Creator: Buckingham, A. C.; Siekhaus, W. J.; Keller, J. O.; Ellzey, J.; Hubbard, G. & Daily, J. W.
Object Type: Article
System: The UNT Digital Library
The military-industrial complex. A current reading list. 1969 (open access)

The military-industrial complex. A current reading list. 1969

This report consists of list of the military-industrial complex.
Date: May 20, 1969
Creator: Browne, Marjorie Ann
Object Type: Report
System: The UNT Digital Library
Automatic voltage-imbalance detector (open access)

Automatic voltage-imbalance detector

A device is described for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.
Date: May 20, 1981
Creator: Bobbett, R. E.; McCormick, J. B. & Kerwin, W. J.
Object Type: Patent
System: The UNT Digital Library
Fusion product deposition and energy balance (open access)

Fusion product deposition and energy balance

Extensive Monte-Carlo calculations were performed of alpha-particle deposition in the Hill's Vortex configuration, as reported in D.E. Driemeyer's Ph.D. Thesis (University of Illinois, 1980). This has generally been done including a cold plasma density, n/sub c/, on the open field lines, with n/sub C//T/sub C//sup 3/2/ approx. = n/sub H//T/sub H//sup 3/2/ - i.e. with the slowing down ratio tau/sub H//tau/sub C/ lying between .1 and 10. Since many of the alpha particles spend a significant amount of their time on the open field lines, values of tau/sub H//tau/sub C/ greater than unity lead to significant removal of alpha-particle ash from the closed-field region. Surprisingly, one is able to perform this ash removal and still retain enough energy to raise the reactor Q significantly (or even ignite it).
Date: May 20, 1980
Creator: Condit, W.C. & Driemeyer, D.E.
Object Type: Report
System: The UNT Digital Library
Radiation interactions for tomography. Revision 1 (open access)

Radiation interactions for tomography. Revision 1

There are new requirements emerging in the field of tomography: the need for spatial resolution in the micrometre range, atomic species specificity, and quantitative density discrimination.
Date: May 20, 1985
Creator: Zolnay, A.S.
Object Type: Article
System: The UNT Digital Library
[News Clip: Hoffman] captions transcript

[News Clip: Hoffman]

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: May 20, 1994, 5:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
Survey of Magnetic Fields Near BPA 230-kV and 500-kV Transmission Lines. (open access)

Survey of Magnetic Fields Near BPA 230-kV and 500-kV Transmission Lines.

The purpose of this study was to characterize typical levels and variability of 60Hz magnetic fields at the centerline and edge of right-of-way of Bonneville Power Administration (BPA) 230-kV and 500-kV transmission lines. This was accomplished by taking magnetic field measurements at over 800 spans in Oregon and Washington. The spans were sampled using a stratified random sampling procedure with region (East vs. West), voltage (230-kV vs 500-kV), and circuit configuration as strata. There were five different circuit configuration groups for each region/voltage category requiring a total of 200 strata. Magnetic field measurements were taken at 13 locations under each span using an EMDEX-C as a survey meter. Additional information recorded for each span included conductor height (at 10 locations), right-of-way width, longitudinal and lateral slope, time of day, vegetation, terrain, weather conditions, temperature, wind speed, span length and presence of other lines in the corridor. 9 refs., 17 figs., 26 tabs.
Date: May 20, 1991
Creator: Perrin, Nancy; Aggarwal, Rajinder Pal & Bracken, T. Daniel
Object Type: Report
System: The UNT Digital Library
Laser produced plasma soft x-ray generation (open access)

Laser produced plasma soft x-ray generation

The efficiency of soft x-ray production from laser-irradiated plasmas is simulated for two different spectral regions. These two regions, 14{Angstrom} {plus minus} 15% and 130{Angstrom} {plus minus} 1%, were chosen for proximity mask or point-projection technological applications. Relatively large conversion efficiencies were obtained from irradiation of a stainless steel target using the conditions suggested by recent Hampshire Instruments' experiments for proximity masking. Pulse-width and laser frequency parameter studies were performed for point-projection applications which suggest that the conversion applications which suggest that the conversion efficiency is sensitive to pulse-width but not to laser frequency. One of the critical components of any x-ray lithographic scheme is of course the x-ray laser source. There are two primary contenders for a reliable, efficient source currently: synchrotron radiation and spectral emission from laser produced plasma. The dominant issue for laser-plasma emission is the conversion efficiency -- output in the intended operating spectral region relative the required incident laser energy. Simulations are described in the following for both high and low energy spectral regions which have been suggested by either the proximity masking or point-projection technology.
Date: May 20, 1991
Creator: Cerjan, C. & Rosen, M.D.
Object Type: Article
System: The UNT Digital Library
The Mangum Star. (Mangum, Okla.), Vol. 21, No. 47, Ed. 1 Thursday, May 20, 1909 (open access)

The Mangum Star. (Mangum, Okla.), Vol. 21, No. 47, Ed. 1 Thursday, May 20, 1909

Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1909
Creator: Farris, Giles W.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Greer County Democrat (Mangum, Okla.), Vol. 25, No. 36, Ed. 1 Thursday, May 20, 1915 (open access)

The Greer County Democrat (Mangum, Okla.), Vol. 25, No. 36, Ed. 1 Thursday, May 20, 1915

Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1915
Creator: Watt, W. O.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1490, Ed. 1 Sunday, May 20, 1894 (open access)

Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1490, Ed. 1 Sunday, May 20, 1894

Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date: May 20, 1894
Creator: Smith, Winfield S.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 8, No. 11, Ed. 1 Thursday, May 20, 1915 (open access)

The Oklahoma Democrat (Altus, Okla.), Vol. 8, No. 11, Ed. 1 Thursday, May 20, 1915

Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1915
Creator: Powell, Eugene
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 3, No. 8, Ed. 1 Thursday, May 20, 1909 (open access)

The Oklahoma Democrat. (Altus, Okla.), Vol. 3, No. 8, Ed. 1 Thursday, May 20, 1909

Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1909
Creator: Ruthruff, C. E.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Oklahoma Weekly Leader (Guthrie, Okla.), Vol. 30, No. 12, Ed. 1 Thursday, May 20, 1920 (open access)

Oklahoma Weekly Leader (Guthrie, Okla.), Vol. 30, No. 12, Ed. 1 Thursday, May 20, 1920

Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1920
Creator: Niblack, Leslie G.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Tyrone Observer. (Tyrone, Okla.), Vol. 5, No. 41, Ed. 1 Thursday, May 20, 1909 (open access)

Tyrone Observer. (Tyrone, Okla.), Vol. 5, No. 41, Ed. 1 Thursday, May 20, 1909

Weekly newspaper from Tyrone, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1909
Creator: unknown
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Altus Weekly News. (Altus, Okla.), Vol. 16, No. 12, Ed. 1 Thursday, May 20, 1915 (open access)

The Altus Weekly News. (Altus, Okla.), Vol. 16, No. 12, Ed. 1 Thursday, May 20, 1915

Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date: May 20, 1915
Creator: Orr, J. P.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Altus Weekly News. (Altus, Okla.), Vol. 21, No. 13, Ed. 1 Thursday, May 20, 1920 (open access)

The Altus Weekly News. (Altus, Okla.), Vol. 21, No. 13, Ed. 1 Thursday, May 20, 1920

Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date: May 20, 1920
Creator: Orr, J. P.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Cushing Independent. (Cushing, Okla.), Vol. 8, No. 26, Ed. 1 Thursday, May 20, 1909 (open access)

Cushing Independent. (Cushing, Okla.), Vol. 8, No. 26, Ed. 1 Thursday, May 20, 1909

Weekly newspaper from Cushing, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1909
Creator: Holland, Al. H.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Herald-Sentinel. (Cloud Chief, Okla. Terr.), Vol. 7, No. 19, Ed. 1 Friday, May 20, 1898 (open access)

The Herald-Sentinel. (Cloud Chief, Okla. Terr.), Vol. 7, No. 19, Ed. 1 Friday, May 20, 1898

Weekly newspaper from Cloud Chief, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date: May 20, 1898
Creator: unknown
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 25, No. 11, Ed. 1 Thursday, May 20, 1915 (open access)

The Guymon Herald. (Guymon, Okla.), Vol. 25, No. 11, Ed. 1 Thursday, May 20, 1915

Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1915
Creator: Zimmerman, Warren
Object Type: Newspaper
System: The Gateway to Oklahoma History
Hooker Advance (Hooker, Okla.), Vol. 7, No. 15, Ed. 1 Friday, May 20, 1910 (open access)

Hooker Advance (Hooker, Okla.), Vol. 7, No. 15, Ed. 1 Friday, May 20, 1910

Weekly newspaper from Hooker, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1910
Creator: unknown
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 5, No. 29, Ed. 1 Friday, May 20, 1910 (open access)

The Crowder City Guardian (Crowder, Oklahoma), Vol. 5, No. 29, Ed. 1 Friday, May 20, 1910

Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1910
Creator: Barrow, A. E.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 30, No. 12, Ed. 1 Thursday, May 20, 1920 (open access)

The Guymon Herald. (Guymon, Okla.), Vol. 30, No. 12, Ed. 1 Thursday, May 20, 1920

Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date: May 20, 1920
Creator: unknown
Object Type: Newspaper
System: The Gateway to Oklahoma History