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Fundamental Studies of Erosion for Coal Gasification Systems. Annual Progress Report, 1 November 1979-30 June 1980
The effort in this program is divided between modelling the particle impact event using numerical methods and computer calculations and actual measurement of erosion rates. While the results obtained from each of these activities must be combined to provide an improved understanding of particulate erosion of ductile materials, it is convenient to describe separately the progress in each activity area. The first step in the application of the finite element method to any problem is the dissolution of the continuum into small elements. The intent of this procedure is to use as few total elements as possible and to make the elements small where gradients are large and vice versa. The exact solution for the contact of a rigid cylinder with an elastic surface is available from Hertz. This solution has been compared with the computer results obtained from finite element maps containing 148, 273, and 474 elements. The correlation between the computer results and elastic solution is not good for the map with the fewest elements, but improves as the number of elements increases. Convergence to this exact solution has been examined as a function of the number of map elements as a means of improving the efficiency of …
Date:
July 27, 1980
Creator:
Follansbee, P. S.; Sinclair, G. B. & Williams, J. C.
Object Type:
Report
System:
The UNT Digital Library
Preliminary designs for ocean thermal energy conversion (OTEC) stationkeeping subsystems (SKSS). Task II. Conceptual design. Final report
The study is presented in five sections: design loads, conceptual designs, trade studies, cost analysis and concept evaluation and ranking. Extensive appendixes provide back up calculations and data to support the results. Environmental forces and yaw moments acting on the barge and spar in the various design sea states are presented including wave, wind and current effects. A parametric analysis illustrates the impact on holding power requirement of varying the return periods for operational and extreme sea state. The conceptual designs are presented for the barge followed by those for the spar, including configuration definition, performance characteristics, interfaces, areas for development, and deployment scenarios for selected concepts. The concept definition is followed by a set of trade studies that were performed to evaluate candidate anchor types and anchor leg materials. Parametric variations in anchor leg characteristics, wire-rope-to-chain length ratio for example, illustrate the influence of the significant design parameters on performance. An extensive cost analysis of the candidate SKSS concepts is presented, including cost estimates, life cycle cost scenarios leading to expected value of life cycle cost, and cost equivalence of operational failures. An evaluation of the eight SKSS concepts is presented, including assessment of performance and rankings based on …
Date:
July 27, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Simpson]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
July 27, 1994, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
AN ESTIMATE OF THE EFFECT OF NEUTRON-ENERGY SPECTRUM ON RADIATION DAMAGE OF STEEL
The postulate that the average number of lattice displacements is directly proportional to the available energy is carried one step further; it is assumed that damage to steel (particularly in regard to brittle fracture) is proportional to the number of lattice vacancies that occur. The model, although crude, permits estimation of the relative damage resulting from differences in neutron spectra. The results can be used as a rough method of correcting damage data for the effect of the neutron-energy spectrum. Radiation damage calculations for steel, relative to those for a fission spectrum, were made for neutron spectra that result from fission neutrons penetrating water or graphite. The results were plotted as a function of effective distance from the fission source. From this plot it is possible to make a conservative estimate of the correction factor to apply to damage data obtained with different neutron spectra. (auth)
Date:
July 27, 1962
Creator:
Claiborne, H.C.
Object Type:
Report
System:
The UNT Digital Library
EFFECTIVE CUTOFF ENERGIES FOR B, Cd, Gd, AND Sm FILTERS
Effective energy cutoffs have been calculated on an IBM7090 computer for Cd, Gd, Sm, and B filters as functions of filter geometry, the ratio of Maxwellian to epithermal flux (assumed to be 1/E), the lower energy limit of the 1/E flux, the energy corresponding to the Maxwellian most probable (modal) velocity and filter thickness. The geometrical configurations were spherical (which on the assumptions madc is equivalent to a beam flux case), cylindrical and slab. By the use of two or three different filters (Cd and Gd and perhaps Sm) it should be possible to detect resonances in the thermal to cutoff energy regions, in addition to measuring resonance integrals and thermial cross sections of unknown nuclides. (auth)
Date:
July 27, 1962
Creator:
Stoughton, R.W. & Halperin, J.
Object Type:
Report
System:
The UNT Digital Library
Temperature Coefficients of the Reactivity Measurement Facility
The temperature coefficient of the Reactivity Measurement Facility was found to be 49 plus or minus 1 mu k/ deg C (1 mu k = 10/sup -6/ DELTA k/k) in the range 15.4 to l7.8 deg C. The change in the net reactivity of a standard sample was --0.48 plus or minus 0.02, --0.66 plus or minus 0.03, and --0.78 plus or minus 0.02 mu k/ deg C in three measuring positions. These low values generally make temperature corrections insignificant. The above results are compared with previous determined values. This information developed in the RMF should be generally applicable to flux-trap-type reactors such as the Advanced Reactivity Measurement Facility (ARMF) and ARMF-ll, now under construction. RMF was dismantled in April 1962. (auth)
Date:
July 27, 1962
Creator:
Fast, E.
Object Type:
Report
System:
The UNT Digital Library
Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1546, Ed. 1 Friday, July 27, 1894
Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
July 27, 1894
Creator:
Smith, Winfield Scott
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 11, No. 3, Ed. 1 Wednesday, July 27, 1898
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
July 27, 1898
Creator:
Townsend, G. B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla. Terr.), Vol. 18, No. 4, Ed. 1 Thursday, July 27, 1905
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
July 27, 1905
Creator:
Echols, R. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Mirror (Mangum, Okla.), Vol. 1, No. 38, Ed. 1 Friday, July 27, 1917
Semi-weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1917
Creator:
Ryder, J. W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 9, No. 20, Ed. 1 Thursday, July 27, 1916
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1916
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Greer County Democrat (Mangum, Okla.), Vol. 26, No. 46, Ed. 1 Thursday, July 27, 1916
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1916
Creator:
Watt, W. O.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 5, No. 19, Ed. 1 Thursday, July 27, 1911
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1911
Creator:
Williams, R. T.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Taloga Times-Advocate (Taloga, Okla.), Vol. 29, No. 7, Ed. 1 Thursday, July 27, 1922
Weekly newspaper from Taloga, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1922
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guthrie Daily Star (Guthrie, Okla.), Vol. 9, No. 119, Ed. 1 Saturday, July 27, 1912
Daily newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1912
Creator:
Hornaday, W. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Canadian Advertiser. (Canadian, Indian Terr.), Vol. 6, No. 48, Ed. 1 Friday, July 27, 1900
Weekly newspaper from Canadian, Indian Territory that includes local, territorial, and national news along with advertising.
Date:
July 27, 1900
Creator:
Tignor, J. D.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Safeguard. (Guthrie, Okla.), Vol. 12, No. 26, Ed. 1 Thursday, July 27, 1905
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
July 27, 1905
Creator:
Buchanan, C. A.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Phase Equilibria in High Energy Density PVDF-Based Polymers
Article on phase equilibria in high energy density PVDF-based polymers.
Date:
July 27, 2007
Creator:
Ranjan, Vivek; Yu, Liping; Buongiorno Nardelli, Marco & Bernholc, Jerry
Object Type:
Article
System:
The UNT Digital Library
The Tyrone Observer (Tyrone, Okla.), Vol. 19, No. 8, Ed. 1 Thursday, July 27, 1922
Weekly newspaper from Tyrone, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1922
Creator:
Mast, C. W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News. (Altus, Okla.), Vol. 18, No. 22, Ed. 1 Thursday, July 27, 1916
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
July 27, 1916
Creator:
Orr, J. P.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Cushing Independent (Cushing, Okla.), Vol. 21, No. 49, Ed. 1 Friday, July 27, 1917
Weekly newspaper from Cushing, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1917
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 32, No. 22, Ed. 1 Thursday, July 27, 1922
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 27, 1922
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
West and South. (Guthrie, Okla.), Vol. 2, No. 38, Ed. 1 Thursday, July 27, 1893
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
July 27, 1893
Creator:
Copeland, A. G.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla. Terr.), Vol. 15, No. 18, Ed. 1 Thursday, July 27, 1905
Weekly newspaper from Guymon, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
July 27, 1905
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History