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424 Matching Results
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Altus Times (Altus, Okla.), Vol. 100, No. 56, Ed. 1 Sunday, May 23, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
Cole, Carol
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Alvin Sun-Advertiser (Alvin, Tex.), Vol. 108, No. 82, Ed. 1 Sunday, May 23, 1999
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 175, Ed. 1 Sunday, May 23, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Characterization and Process Development of Cyanate Ester Resin Composites
Cyanate ester resins offer advantages as composite matrices because of their high thermal stability, low outgassing, low water absorption, and radiation resistance. This paper describes the results of a processing study to develop a high-strength hoop-wound composite by the wet-filament winding method using Toray TI 000G carbon fiber and YLA RS- 14A cyanate ester resin as the constituent materials. The study shows that the cyanate ester resin has a broad process envelope but that an inert-atmosphere cure is essential for obtaining optimum resin and composite properties. Minimizing moisture exposure prior to and during cure is also crucial as it affects the glass transition temperature of the resin and composite. Composite cylinders wound and cured with these methods yielded excellent ring tensile strengths both at room and elevated temperature. A summary of the measured mechanical and thermal property data for these composites is presented. Potential applications for these materials include flywheeI energy storage systems for space and satellite structures.
Date:
May 23, 1999
Creator:
Frame, B.J.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Sunday, May 23, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Fiber-Matrix Interface Studies on Electron Beam Cured Composites
The recently completed Department of Energy (DOE) and industry sponsored Cooperative Research and Development Agreement (CRADA) entitled, ''Electron Beam Curing of Polymer Matrix Composites,'' determined that the interlaminar shear strength properties of the best electron beam cured IM7/epoxy composites were 19-28% lower than autoclave cured IM7/epoxy composites (i.e. IM7/977-2 and IM7/977-3). Low interlaminar shear strength is widely acknowledged as the key barrier to the successful acceptance and implementation of electron beam cured composites in the aircraft/aerospace industry. The objective of this work was to improve the interlaminar shear strength properties of electron beam cured composites by formulating and evaluating several different fiber sizings or coating materials. The researchers have recently achieved some promising results by having discovered that the application of epoxy-based, electron beam compatible sizings or coatings onto surface-treated, unsized IM7 carbon fibers improved the composite interlaminar shear strength properties by as much as 55% versus composites fabricated from surface-treated, unsized IM7 fibers. In addition, by applying these same epoxy-based sizings or coatings onto surface-treated, unsized IM7 fibers it was possible to achieve an 11% increase in the composite interlaminar shear strength compared to composites made from surface-treated, GP-sized IM7 fibers. Work is continuing in this area of research …
Date:
May 23, 1999
Creator:
Drazel, L. T.; Janke, C. J. & Yarborough, K. D.
Object Type:
Article
System:
The UNT Digital Library
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 21, No. 15, Ed. 1 Sunday, May 23, 1999
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
Rigg, John
Object Type:
Newspaper
System:
The Portal to Texas History
The Panola Watchman (Carthage, Tex.), Vol. 126, No. 41, Ed. 1 Sunday, May 23, 1999
Semiweekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 117, No. 41, Ed. 1 Sunday, May 23, 1999
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
May 23, 1999
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
The Seminole Sentinel (Seminole, Tex.), Vol. 92, No. 62, Ed. 1 Sunday, May 23, 1999
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1999
Creator:
Dow, M. Gene & Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
Step structure of GaInAsSb grown by OMVPE (Organometallic Vapor Phase Epitaxy)
The microscopic surface morphology of GaInAsSb grown by organometallic vapor phase epitaxy (OMVPE)on GaSb substrates has been studied by atomic force microscopy. The effects of growth temperature, alloy composition, and substrate misorientation on the step structure were investigated. The competition between thermodynamically driven phase separation and kinetically limited surface diffusion is discussed.
Date:
May 23, 1999
Creator:
Charache, G.W. & Wang, C.A.
Object Type:
Article
System:
The UNT Digital Library
[Wheeler Avenue Baptist Church Bulletin: May 23, 1999]
Church bulletin listing the order of worship for the 7:30 and 11:00 Sunday morning services at the Wheeler Avenue Baptist Church, as well as various notes about upcoming events, congregational news, and other information of relevance to church members.
Date:
May 23, 1999
Creator:
Wheeler Avenue Baptist Church (Houston, Tex.)
Object Type:
Pamphlet
System:
The Portal to Texas History
X-Ray Scattering Applications Using Pulsed X-Ray Sources
Pulsed x-ray sources have been used in transient structural phenomena investigations for over fifty years; however, until the advent of synchrotrons sources and the development of table-top picosecond lasers, general access to ligh temporal resolution x-ray diffraction was relatively limited. Advances in diffraction techniques, sample excitation schemes, and detector systems, in addition to IncEased access to pulsed sources, have ld tO what is now a diverse and growing array of pulsed-source measurement applications. A survey of time-resolved investigations using pulsed x-ray sources is presented and research opportunities using both present and planned pulsed x-ray sources are discussed.
Date:
May 23, 1999
Creator:
Larson, B.C.
Object Type:
Article
System:
The UNT Digital Library
Axionic hot dark matter in the hadronic axion window
Mixed dark matter scenario can reconcile the COBE data and the observed large scale structure. So far the massive neutrino with a mass of a few eV has been the only discussed candidate for the hot dark matter component. We point out that the hadronic axion in the so-called hadronic axion window, f{sub a} {approx} 10{sup 6} GeV, is a perfect candidate as hot dark matter within the mixed dark matter scenario. The current limits on the hadronic axion are summarized. The most promising methods to verify the hadronic axion in this window are the resonant absorption of almost-monochromatic solar axions from M1 transition of the thermally excited {sup 57}Fe in the Sun, and the observation of the ''axion burst'' in water Cerenkov detectors from another supernova.
Date:
May 23, 1998
Creator:
Moroi, Takeo & Murayama, Hitoshi
Object Type:
Article
System:
The UNT Digital Library
The Bastrop Advertiser (Bastrop, Tex.), Vol. 145, No. 24, Ed. 1 Saturday, May 23, 1998
Semi-weekly newspaper from Bastrop, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1998
Creator:
McAuley, Davis
Object Type:
Newspaper
System:
The Portal to Texas History
The Daily Chickasha Star (Chickasha, Okla.), Vol. 97, No. 79, Ed. 1 Saturday, May 23, 1998
Newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 23, 1998
Creator:
Settle, David
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Email from Charles Domingues to John Thomas]
Email from Charles Domingues to John Thomas. In the email, Domingues writes about how great of a mentor and contributor to the lesbian and gay community and hopes to discuss with him about renaming one of their buildings after him.
Date:
May 23, 1998
Creator:
Domingues, Charles
Object Type:
Text
System:
The UNT Digital Library
[Funeral Program for Thurman Charles Wallace, Sr., May 23, 1998]
Funeral program for Thurman Charles Wallace, Sr., born September 2, 1946. The funeral was held May 23, 1998 at Porter Memorial CME Church, officiated by Rev. Kenneth Cain. Funeral arrangements were made through Carter-Taylor Williams Mortuary, and he was buried in the Fort Sam Houston National Cemetery near San Antonio, Texas.
Date:
May 23, 1998
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
The Gilmer Mirror (Gilmer, Tex.), Vol. 121, No. 41, Ed. 1 Saturday, May 23, 1998
Semiweekly newspaper from Gilmer, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1998
Creator:
Overton, Mac
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Stolen Police Car]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
May 23, 1998, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 88, No. 41, Ed. 1 Saturday, May 23, 1998
Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 23, 1998
Creator:
Gann, Sherry
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Accelerator modeling at SPEAR
The response matrix, consisting of the closed orbit change at each beam position monitor (BPM) due to corrector magnet excitations, was measured and analyzed in order to calibrate a linear optics model of SPEAR. The model calibration was accomplished by varying model parameters to minimize the chi-square difference between the measured and the model response matrices. The singular value decomposition (SVD) matrix inversion method was used to solve the simultaneous equations. The calibrated model was then used to calculate corrections to the operational lattice. The results of the calibration and correction procedures are presented.
Date:
May 23, 1997
Creator:
LeBlanc, G. & Corbett, W.J.
Object Type:
Article
System:
The UNT Digital Library
Accurate atomistic simulations of the Peierls barrier and kink-pair formation energy for {lt}111{gt} screw dislocations in bcc-Mo
Using multi-ion MGPT interatomic potentials derived from first- principles generalized pseudopotential theory, we have performed accurate atomistic simulations on the energetic of dislocation motion in the bcc transition metal Mo. Our calculated results include the (110) and (211) generalized stacking fault ({gamma}) energy surfaces, the Peierls stress required to move an ideal straight <111> screw dislocation, and the kink-pair formation energy for nonstraight screw dislocations. Many-body angular forces, which are accounted for in the present theory through explicit three- and four-ion potentials, are quantitatively important to such properties for the bcc transition metals. This is demonstrated explicitly through the calculated {gamma} surfaces, which are found to be 10-50% higher in energy than those obtained with pure radial-force models. The Peierls stress for an applied <111>/{l_brace}112{r_brace} shear is computed to be about 0.025{mu}, where {mu} is the bulk shear modulus. For zero applied stress, stable kink pairs are predicted to form for kink lengths greater than 4b, where b is the magnitude of the Burgers vector. For long kinks greater than 15b, the calculated asymptotic value of the kink-pair formation energy is 2.0 eV.
Date:
May 23, 1997
Creator:
Xu, W. & Moriarty, J.A.
Object Type:
Article
System:
The UNT Digital Library
Advanced ceramics for land-based gas turbine applications. Final report
In order to increase the efficiency of land-based gas turbines, inlet gas temperatures have to be increased, and the amount of air which cools the turbine vanes has to be reduced, to the maximum extent possible. Presently, thermal barrier coatings (TBC`s) are the state of the art in achieving these goals. However, since TBC`s are very thin (typically 100 {mu}m), they have clearly limitations. Since all-ceramic turbine vanes would be a very large and risky development step, Westinghouse is considering to protect the leading edges of turbine vanes with high-performance ceramics. This might be done by either replacing the leading edge with a suitably shaped ceramic part, or by modifying the vanes such that they can accommodate ceramic inserts. Among the most important criteria for the success of ceramics in such applications are (a) thermodynamic compatibility with the turbine vane alloy, (b) sufficient thermal shock resistance to survive the thermal cycling during operation and in particular during emergency shut-down, and a design considering the thermal expansion mismatch of the metallic and ceramic components. This paper presents results of work performed on SiC, SiN, and aluminas.
Date:
May 23, 1997
Creator:
Schneibel, J.H.; Ludeman, E. & Sabol, S.M.
Object Type:
Report
System:
The UNT Digital Library