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7,109 Matching Results
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Shock-induced alpha-omega structural phase transformation of titanium: A molecular-dynamics study
None
Date:
March 15, 2004
Creator:
Sadigh, B; Lenosky, T; Oppelstrup, T; Minich, R & Gilmer, G
Object Type:
Article
System:
The UNT Digital Library
[News Script: Ling_Temco-Vought]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
March 5, 1971, 10:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: Ling-Temco-Vought]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
March 5, 1971, 6:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[Funeral Program for John Thomas Dossie, March 5, 2014]
Funeral program for John Thomas (Bubba) Dossie, born December 27, 1952 and died February 23, 2014. The funeral was held March 5, 2014 at Collins Funeral Home, officiated by Rev. Michael Richardson. Funeral arrangements were made through Collins Funeral Home.
Date:
March 5, 2014
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
[Letter from Geraldine Smedler to Friends - March 26, 1987]
Letter from Geraldine Smedler to the San Antonio chapter of The Links, Inc. inviting them to attend and support a fashion show, pageant, and fund raiser hosted by the San Antonio chapter of the Alpha Kappa Alpha Sorority.
Date:
March 26, 1987
Creator:
Smedler, Geraldine
Object Type:
Letter
System:
The Portal to Texas History
[Letter from Geraldine Smedler to Friends - March 26, 1987]
Letter from Geraldine Smedler to the San Antonio chapter of The Links, Inc. inviting them to attend and support a fashion show, pageant, and fund raiser hosted by the San Antonio chapter of the Alpha Kappa Alpha Sorority. Included is a blank form for buying advertisements in the event's program.
Date:
March 26, 1987
Creator:
Smedler, Geraldine
Object Type:
Letter
System:
The Portal to Texas History
Constraining |V(td)|/|V(ts)| Using Radiative Penguin B -> V(K*/rho/omega)gamma Decays
Exclusive radiative penguin B decays, B {yields} (K*{sup 0}/K*{sup +}) and B {yields} ({rho}/{omega}){gamma}, are flavor-changing neutral-current (FCNC) processes. Studies of these decays are of special interest in testing Standard Model (SM) predictions and searching for other beyond-the-SM FCNC interactions. Using 89 x 10{sup 6} B{bar B} pairs from BABAR, we measure the branching fraction ({Beta}), CP-asymmetry ({Alpha}), and isospin asymmetry ({Delta}{sub 0-}) of B {yields} (K*{sup 0}/K*{sup +}){gamma} as follows: {Beta}(B{sup 0} {yields} K*{sup 0}{gamma}) = 3.92 {+-} 0.20(stat.) {+-} 0.24(syst.); {Beta}(B{sup +} {yields} K*{sup +}{gamma}) = 3.87 {+-} 0.28(stat.) {+-} 0.26(syst.); {Alpha}(B {yields} K*{gamma}) = -0.013 {+-} 0.36(stat.) {+-} 0.10(syst.); {Delta}{sub 0-}(B {yields} K*{gamma}) = 0.050 {+-} 0.045(stat.) {+-} 0.028(syst.) {+-} 0.024(R{sup +/0}). The 90% confidence intervals for the CP-asymmetry and the isospin-asymmetry in the B {yields} K*{gamma} decay are given as: -0.074 < {Alpha}(B {yields} K*{gamma}) < 0.049, -0.046 < {Delta}{sub 0-} (B {yields} K*{gamma}) < 0.146. We also search for B {yields} ({rho}/{omega}){gamma} decays using 211 x 10{sup 6} B{bar B} pairs from BABAR. No evidence for these decays is found. We set the upper limits at 90% confidence level for these decays: {Beta}(B{sup 0} {yields} {rho}{sup 0}{gamma}) < 0.4 x 10{sup -6}; {Beta}(B{sup +}{yields} {rho}{sup …
Date:
March 8, 2006
Creator:
Tan, Ping
Object Type:
Report
System:
The UNT Digital Library
The Role of Ledge Nucleation/Migration in ''Omega'' Plate Thickening Behavior in Al-Cu-Mg-Ag Alloys
The thickening kinetics of {Omega} plates in an Al-4Cu-0.3Mg-0.2Ag (wt. %) alloy have been measured at 200 C, 250 C and 300 C using conventional transmission electron microscopy techniques. At all temperatures examined the thickening showed a linear dependence on time. At 200 C the plates remained less than 6nm in thickness after 1000h exposure. At temperatures above 200 C the thickening kinetics are greatly increased. Atomic resolution Z-contrast microscopy has been used to examine the structure and chemistry of the (001){sub {Omega}} {parallel} (111){sub {alpha}} interphase boundary in samples treated at each temperature. In all cases, two atomic layers of Ag and Mg segregation were found at the broad face of the plate. The risers of the growth ledges and the ends of the plates were free of segregation. No significant levels of Ag or Mg were detected inside the plate at any time. The necessary redistribution of Ag and Mg accompanying a migrating thickening ledge occurs at all temperatures and is not considered to play a decisive role in the excellent coarsening resistance exhibited by the {Omega} plates at temperatures up to 200 C. Plates transformed at 200 C rarely contained ledges and usually exhibited a strong vacancy …
Date:
March 16, 2001
Creator:
Hutchinson, C.R.
Object Type:
Article
System:
The UNT Digital Library
[News Script: Okonite]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about Ling-Temco-Vought Inc having bids for their divestment.
Date:
March 2, 1971, 6:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[News Script: TCU students]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a news story about Texas Christian University hosting Derby Day in Fort Worth, Texas.
Date:
March 24, 1961
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
[38th Annual Greek Explosion]
Video of the 38th Annual Greek Explosion, a step show hosted by the University of North Texas in 2008.
Date:
March 1, 2008
Creator:
University of North Texas. Center for Media Production.
Object Type:
Video
System:
The UNT Digital Library
Near-Infrared Properties of Moderate-Redshift Galaxy Clusters: Halo Occupation Number, Mass-to-Light Ratios and Omega(M)
Using K-band imaging for 15 of the Canadian Network for Observational Cosmology (CNOC1) clusters we examine the near-infrared properties of moderate-redshift (0.19 < z < 0.55) galaxy clusters. We find that the number of K-band selected cluster galaxies within R{sub 500} (the Halo Occupation Number, HON) is well-correlated with the cluster dynamical mass (M{sub 500}) and X-ray Temperature (T{sub x}); however, the intrinsic scatter in these scaling relations is 37% and 46% respectively. Comparison with clusters in the local universe shows that the HON-M{sub 500} relation does not evolve significantly between z = 0 and z {approx} 0.3. This suggests that if dark matter halos are disrupted or undergo significant tidal-stripping in high-density regions as seen in numerical simulations, the stellar mass within the halos is tightly bound, and not removed during the process. The total K-band cluster light (L{sub 200},K) and K-band selected richness (parameterized by B{sub gc,K}) are also correlated with both the cluster T{sub x} and M{sub 200}. The total (intrinsic) scatter in the L{sub 200,K}-M{sub 200} and B{sub gc,K}-M{sub 200} relations are 43%(31%) and 35%(18%) respectively and indicates that for massive clusters both L{sub 200,K} and B{sub gc,K} can predict M{sub 200} with similar accuracy as …
Date:
March 1, 2007
Creator:
Muzzin, Adam; Yee, H. K. C.; Hall, Patrick B. & Lin, Huan
Object Type:
Article
System:
The UNT Digital Library
Direct Observation of the alpha-epsilon Transition in Shock-compressed Iron via Nanosecond X-ray Diffraction
In-situ x-ray diffraction studies of iron under shock conditions confirm unambiguously a phase change from the bcc ({alpha}) to hcp ({var_epsilon}) structure. Previous identification of this transition in shock-loaded iron has been inferred from the correlation between shock wave-profile analyses and static high-pressure x-ray measurements. This correlation is intrinsically limited because dynamic loading can markedly affect the structural modifications of solids. The in-situ measurements are consistent with a uniaxial collapse along the [001] direction and shuffling of alternate (110) planes of atoms, and in good agreement with large-scale non-equilibrium molecular dynamics simulations.
Date:
March 21, 2005
Creator:
Kalantar, D. H.; Belak, J. F.; Collins, G. W.; Colvin, J. D.; Davies, H. M.; Eggert, J. H. et al.
Object Type:
Article
System:
The UNT Digital Library
Early-time measurements of soft x-ray emission in an omega-upgrade laser-produced plasma. Semi-annual report, October 1, 1996--March 31, 1997
Beginning in January 1997 (following arrival of the FY-97 funding) we have been preparing for our first series of experiments under this grant at the University of Rochester Laboratory for Laser Energetics (LLE) on the Omega Upgrade laser facility, now scheduled to commence June 2, 1997. For these experiments we have purchased (just arrived) a four-channel gated-stripline microchannel plate (MCP) detector to be coupled to our soft x-ray flat-field grazing incidence spectrograph used previously at LLE. This will permit time-resolved `snapshots` of the complete spectra with a resolution to times as short as 180 ps per strip. An advantage of this technique over the streak camera used previously is the lack of any carbon absorbers such as in the thin plastic cathode required for the streak camera. This eliminates absorption in the 30-44 {angstrom} spectral region in which we are interested for intermediate-Z target materials such as Mg, Al and Si. An auxiliary turbomolecular-drag pump has also been installed in order to obtain the necessary vacuum for optimum MCP operation.
Date:
March 31, 1997
Creator:
Griem, H. R.; Elton, R. C. & Welch, B. L.
Object Type:
Report
System:
The UNT Digital Library
Group velocity effects in broadband frequency conversion on OMEGA. 1998 summer research program for high school juniors at the University of Rochester`s Laboratory for Laser Energetics: Student research reports
The powerful lasers needed for ICF can only produce light in the infrared wavelengths. However, the one micron wavelength produced by the neodymium glass that powers OMEGA and other lasers used for fusion research does not efficiently compress the fuel pellet. This happens because the infrared light is not well absorbed by the target, and because of the creation of suprathermal electrons. These suprathermal electrons preheat the fuel, adding extra resistance to compression. To eliminate these problems associated with longer wavelengths of light, the process of frequency converting the laser beam was invented. This process efficiently converts the initial beam to a beam which has three times the frequency and one third the wavelength. The third-harmonic beam, in the UV range, has a better absorption rate. The PV-WAVE computer program that the author has written has shown that increasing the frequency of SSD (Smoothing by Spectral Dispersion) on OMEGA to approximately 10 GHz as planned will not hurt the third harmonic generation conversion efficiency significantly. The increased bandwidth and increased frequency of SSD will make the laser beams that strike the target on OMEGA much smoother and more uniform than ever before. Therefore it is both safe and advisable to …
Date:
March 1, 1999
Creator:
Grossman, P.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0224.0527]
Photograph taken for a newspaper owned by the Oklahoma Publishing Company. Caption: "Eating in Alpha Chi Omega, discussion on "Values of Religion."
Date:
March 2, 1949
Creator:
Owen, A. Y.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
An analysis of the uncertainty in temperature and density estimates from fitting model spectra to data. 1998 summer research program for high school juniors at the University of Rochester`s Laboratory for Laser Energetics: Student research reports
Temperature and density histories of direct-drive laser fusion implosions are important to an understanding of the reaction`s progress. Such measurements also document phenomena such as preheating of the core and improper compression that can interfere with the thermonuclear reaction. Model x-ray spectra from the non-LTE (local thermodynamic equilibrium) radiation transport post-processor for LILAC have recently been fitted to OMEGA data. The spectrum fitting code reads in a grid of model spectra and uses an iterative weighted least-squares algorithm to perform a fit to experimental data, based on user-input parameter estimates. The purpose of this research was to upgrade the fitting code to compute formal uncertainties on fitted quantities, and to provide temperature and density estimates with error bars. A standard error-analysis process was modified to compute these formal uncertainties from information about the random measurement error in the data. Preliminary tests of the code indicate that the variances it returns are both reasonable and useful.
Date:
March 1, 1999
Creator:
Schubmehl, M.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0370.0208]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Yards of pretty material become aprons under the skillful fingers of Mrs. Mike Lehr, left, and Mrs. Andrew R. Hickam, members of Alpha Chi Omega Alumnae."
Date:
March 2, 1970
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1064.0058]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Alpha Phi Omega, national service fraternity, has accepted its first woman honorary member, Miss Barbara Lee Price, a junior at Northeastern State College."
Date:
March 10, 1964
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0155.0262]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Half century of service to Alpha Tau Omega fraternity has paid off in a 50th anniversary award for Chief Justice Denver Davison of the staste supreme court, right."
Date:
March 23, 1959
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1136.0323]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Mr. and Mrs. Rosenberry both were graduated from the University of Oklahoma and she is a member of Alpha Chi Omega sorority."
Date:
March 25, 1954
Creator:
King, Cliff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0422B.0170]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Princess of the Oklahoma City University homecoming dance, Linda McDonald, a sophomore from Cordell and member of Alpha Chi Omega sorority, is about to be crowned by Chieftain Joe Gibbon during the half-time ceremonies in Fredrickson Field House Friday night."
Date:
March 1, 1963
Creator:
King, Cliff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1124.0115]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Money spells out welcome gift to Susan Wait Memorial Loan Fund from Alpha Chi Omega Sorority at oklahoma City University, Miss Roberta Reed, left, chapter vice president, and Mrs. Richard L. Long, chapter advisor, spoil their sorority."
Date:
March 2, 1963
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Lead-Alpha Age Determinations of Granitic Rocks from Alaska
Abstract: "Lead-alpha activity age determinations were made on zircon from seven granitic rocks of central and southeastern Alaska. The results of the age determinations indicate two periods of igneous intrusion, one about 95 million years ago, during the Cretaceous period, and another about 53 million years ago, during the early part of the Tertiary. The individual ages determined on zircon from 2 rocks from southeastern Alaska and 1 from east-central Alaska gave results of 90, 100, and 96 million years; those determined on 4 rocks from central Alaska gave results of 47, 56, 58, and 51 million years."
Date:
March 1957
Creator:
Matzo, J. J.; Jaffe, H. W. & Waring, C. L.
Object Type:
Report
System:
The UNT Digital Library