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[Photograph 2012.201.B1422.0048]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mickey Yarberry, Cindy Kendall and Viki Tucker, from left, admire several of the items which were auctioned off recently at the Alpha Chi Alumnae Holiday Boutique in the home of Mrs. John Presley, Edmond."
Date:
December 13, 1982
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1387.0473]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "One of Mrs. Eugene T. Wachter's favorite hobbies is sewing."
Date:
December 3, 1968
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1363.0201]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Wonder what's in this one? Jo Ann Shaw, Betye Jo Whaley and ADA Lee Bostick members of the Alpha Nu chapter of Phi Tau Omega, clockwise from left, shake warpped packages to guess what's inside."
Date:
December 8, 1987
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Funeral Program for Lenard Curtis Gaskin]
Funeral program for Reverend Lenard Curtis Gaskin, born July 19, 1923 and died December 25, 2007. The funeral was held at Friendship Baptist Church, officiated by Pastor Kevin L. Nelson. Funeral arrangements were made through Lewis Funeral Home and he was buried in Meadowlawn Memorial Park in San Antonio, Texas.
Date:
December 25, 2007
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
[Funeral Program for Theodore R. Edwards, Jr., December 18, 2009]
Funeral program for Theodore R. Edwards, Jr., born September 22, 1938 and died December 10, 2009. The funeral was held December 18, 2009 at Macedonia Missionary Baptist Church, officiated by Dr. Jerry Wm. Dailey. Funeral arrangements were made through Lewis Funeral Home and he was buried in Fort Sam Houston National Cemetery, near San Antonio, Texas
Date:
December 18, 2009
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
The Role of Misfit Strain and Oxygen Content on Formation and Evolution of Omega Precipitate in Metastable Beta-titanium Alloys
β-Ti alloys are widely used in airframe and biomedical applications due to their high ductility, high hardenability, and low elastic modulus. The phase transformations in β-Ti alloys are rather complex due to formation of metastable phases during various thermo-mechanical treatments. One such critical metastable phase, the hexagonal omega (ω) phase, can form in β-Ti alloys under quenching from the high temperature β phase and/or isothermal aging at intermediate temperature. Despite a substantial amount of reported works on the ω phase, there are several critical issues related to the ω formation need to be resolved, e.g. role of alloying elements and oxygen content. Therefore, this dissertation has attempted to provide insights into ω transformation in low misfit (Ti-Mo) and high misfit (Ti-V) binary systems as well as multicomponent (Ti-Nb-Zr-Ta) alloys. The evolution of ω structure, morphology and composition from the early stage (β-solution+quenched) to later stages after prolonged aging are systematically investigated by coupling transmission electron microscopy (TEM), atom probe tomography (APT) and high-energy synchrotron X-ray diffraction techniques. The influence of aging temperature and duration on characteristic of ω phase in Ti-Mo, and Ti-V alloys is addressed in details. It is found that compositional changes during aging can alter the structure, …
Date:
December 2016
Creator:
Hendrickson, Mandana
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Current 3 {omega} large optic test procedures and data analysis for the quality assurance of National Ignition Facility
A reliable metric is required to describe the damage resistance of large aperture 3{omega} transmissive optics for the National Ignition Facility (NIF) laser. The trend from single site testing to the more statistically valid Gaussian scanning test requires a well modeled experimental procedure, accurate monitoring of the test parameters, and careful interpretation of the resulting volumes of data. The methods described here provide reliable quality assurance data, as well as intrinsic damage concentration information used to predict the performance expected under use conditions. This paper describes the equipment, test procedure, and data analysis used to evaluate large aperture 3{omega} optics for the NIF laser.
Date:
December 22, 1998
Creator:
Schwartz, S; Feit, M D; Kozlowski, M R & Mouser, R P
Object Type:
Article
System:
The UNT Digital Library
Real-Time Monitoring of Alpha Emissions. Final report, FY 1994
A technology is being developed for on-line, real-time monitoring of mixed and low-level incinerator stacks for levels of airborne alpha activity. The Large-Volume Flow Thru Detector System uses a detector composed of multiple parallel plates of scintillating material fabricated so that the entire stack gas stream flows directly through the inter-plate volume. This report is largely a compilation of 3 reports on background reduction, once-through flow tests, and the aeronautical/mechanical engineering work. The full text of each report is included as an appendix.
Date:
December 31, 1994
Creator:
Gritzo, R.; Fowler, M. & Wouters, J.
Object Type:
Report
System:
The UNT Digital Library
Titanium Boride Formation and Its Subsequent Influence on Morphology and Crystallography of Alpha Precipitates in Titanium Alloys
Over the last two decades there has been an increased interest in understanding the influence of trace boron additions in Ti alloys. These additions refine the prior β grain size in as-cast Ti alloys along with increasing their modulus and yield strength due to the precipitation of TiB. TiB also acts as a heterogeneous nucleation site for α precipitation and has been shown to influence the α phase morphology. B is completely soluble in liquid Ti but has a negligible solubility in both body centered cubic β and hexagonal close packed α phases of Ti. Thus, during solidification of hypoeutectic B containing alloys, B is rejected from β into the liquid where it reacts with Ti to form pristine single crystal whiskers of TiB. Despite a substantial amount of reported experimental work on the characterization of TiB precipitates, its formation mechanism and influence on α phase precipitation are still not clear. The current work is divided into two parts – (i) understanding the mechanism of TiB formation using first principles based density functional theory (DFT) calculations and (ii) elucidating how TiB influences the α phase morphology and crystallography in titanium alloys using electron microscopy techniques. TiB exhibits anisotropic growth morphology …
Date:
December 2013
Creator:
Nandwana, Peeyush
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
[Photograph 2012.201.B0247.0096]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Attending the Alpha Chi Omega alumnae Christmas luncheon were Shelly Fleet, Teresa Roewe, Margaret Moedt and Dorothy Hammert."
Date:
December 8, 1994
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1431.0060]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "QUEEN of the All-College Basketball Tournament now under way is Gloria Zerger, Anadarko, sponsored by Alpha Chi Omega at Oklahoma City University."
Date:
December 26, 1961
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Dynamo dominated accretion and energy flow: The mechanism of active galactic nuclei
An explanation of the magnetic fields of the universe, the central mass concentration of galaxies, the massive black hole of every galaxy, and the AGN phenomena has been an elusive goal. The authors suggest here the outlines of such a theoretical understanding and point out where the physical understanding is missing. They believe there is an imperative to the sequence of mass flow and hence energy flow in the collapse of a galactic mass starting from the first non-linearity appearing in structure formation following decoupling. This first non-linearity of a two to one density fluctuation, the Lyman-{alpha} clouds, ultimately leads to the emission spectra of the phenomenon of AGN, quasars, blazars, etc. The over-arching physical principle is the various mechanisms for the transport of angular momentum. They believe they have now understood the new physics of two of these mechanisms that have previously been illusive and as a consequence they impose strong constraints on the initial conditions of the mechanisms for the subsequent emission of the gravitational binding energy. The new phenomena described are: (1) the Rossby vortex mechanism of the accretion disk {alpha}-viscosity, and (2) the mechanism of the {alpha}-{Omega} dynamo in the accretion disk. The Rossby vortex mechanism …
Date:
December 31, 1998
Creator:
Colgate, S.A. & Li, H.
Object Type:
Article
System:
The UNT Digital Library
Hyperon weak radiative decays and magnetic moments
We have measured the branching ratio and asymmetry parameter in the hyperon radiative decays {Sigma}{sup +} {sup {yields}} p{gamma} and {Xi}{sup {minus}} {sup {yields}} {Sigma}{sup {minus}} {gamma} with samples of 34754{plus_minus}212 and 211{plus_minus}33 events respectively decay {Omega}{sup {minus}} {yields} {Xi}{sup {minus}} {gamma} and made a precision measurement of the magnetic moments of the {Sigma}{sup +} and a first measurement of the magnetic moment of the anti({Sigma}{sup +}). These results and the techniques used in these measurements are discussed.
Date:
December 23, 1993
Creator:
Cooper, P. S. & Collaboration, E761
Object Type:
Report
System:
The UNT Digital Library
Inertial fusion target development for ignition and energy
The target needs of the next ICF experiments that will lead toward ignition and energy are different from those of today`s experiments. The future experiments on OMEGA Upgrade, GEKKO XII Upgrade, the National Ignition Facility and Megajoule will need large, precise, cryogenic targets. Development is needed on a number of aspects of these targets, including shell fabrication, characterization, cryogenic layering and target handling. However, coordinated R and D programs are in place and work is in process to carry out the needed development. It is vital to the success of inertial fusion that this work be sustained. Coordinated effort, like the National Cryogenic Target Program in the USA, will help make the development activities as efficient and effective as possible, and should be encouraged.
Date:
December 1994
Creator:
Schultz, K. R. & Norimatsu, T.
Object Type:
Article
System:
The UNT Digital Library
Optimization of magnetite carrier precipitation process for transuranic waste reduction
Transuranic (TRU) waste that is being generated at Argonne National Laboratory has a TRU activity ranging from 10{sup 2} to 10{sup 7} nCi/g with a wide variety of chemical compositions. Currently, the waste is stored in highly acidic solutions that must be neutralized for intermediate storage. A magnetite carrier precipitation process has been adapted to concentrate TRU isotopes in a noncorrosive solid phase. In this paper, the authors report the results of a series of laboratory tests done to optimize the process. The parameters they optimized included (1) magnetite concentration used to precipitate the TRUs from solution, (2) formation of magnetite (in situ or ex situ), (3) processing pH, and (4) temperature and mixing time of the carrier precipitation. They also studied the effects of anions, cations, and complexing agents in the waste solutions on the carrier precipitation and the effect of magnetite solids loading on the filtration equipment. An overview is given of the planned full-scale process, which will be operated in a glovebox.
Date:
December 31, 1995
Creator:
Slater, S.A.; Chamberlain, D.B.; Aase, S.A.; Babcock, B.D.; Conner, C.; Sedlet, J. et al.
Object Type:
Article
System:
The UNT Digital Library
[Research in theoretical nuclear physics]. Progress report
Research in progress and plans for future investigations are summarized briefly for the following topics: microscopic cluster or resonating-group theory (multiconfiguration studies, effects of antisymmetrization in the nucleon-nucleus interaction, application to p + {alpha} bremsstrahlung), RPA ground state correlations, collisions of deformed nuclei, energy dependence of charge-pickup reactions, alpha-capture reactions in medium-weight nuclei, quantum hydrodynamic approach to nuclear matter, neutron stars and pulsars, transverse momentum distributions, intermittency and other correlations, photon and dilepton production, electroweak theory at high temperature, and fractional statistics.
Date:
December 31, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
POWDER METALLURGY TiAl ALLOYS: MICROSTRUCTURES AND PROPERTIES
The microstructures and properties of powder metallurgy TiAl alloys fabricated by hot extrusion of gas-atomized powder at different elevated temperatures were investigated. Microstructure of the alloy fabricated at 1150 C consisted of a mixture of fine ({gamma} + {alpha}{sub 2}) equiaxed grains and coarse ordered B2 grains. Particles of ordered hexagonal {omega} phase were also observed in some B2 grains. The alloy containing B2 grains displayed a low-temperature superplastic behavior: a tensile elongation of 310% was measured when the alloy was tested at 800 C under a strain rate of 2 x 10{sup -5} s{sup -1}. Microstructure of the alloy fabricated at 1250 C consisted of a mixture of fine ({gamma} + {alpha}{sub 2}) equiaxed grains, coarse {alpha}{sub 2} grains, and lamellar ({gamma} + {alpha}{sub 2}) colonies. An observation of stacking faults associated with fine {gamma} lamellae in {alpha}{sub 2} grains reveals that the stacking fault of {alpha}{sub 2} phase plays an important role in the formation of lamellar ({gamma} + {alpha}{sub 2}) colonies. Unlike the alloy fabricated at 1150{sup o}, the alloy fabricated at 1250{sup o} displayed no low-temperature superplasticity, but a tensile elongation of 260% at 1000 C was measured. Microstructure of the alloy fabricated at 1400 C …
Date:
December 11, 2006
Creator:
Hsiung, L
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0970.0732]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "The omega for the Alpha appears to be coming soon."
Date:
December 7, 1978
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Hadron Spectroscopy Program with CLAS g12
Some conclusions from this presentation are: (1) previous CLAS result on exotic {pi}{sub 1}(1600)/{alpha}{sub 2}(1320) in photoproduction confirmed with higher statistics; (2) previous CLAS result on {gamma}p {yields} pentaquark not confirmed with higher statistics; (3) high luminosity allows exploitation of rare topologies {gamma}p {yields} {phi}{pi}{sup 0}p, {phi}{eta}p, {phi}{omega}p; (4) no observation of any {Xi}* states above 1530 MeV recoiling off of K{sup +}K{sup +} lepton detection permits high statistic study of pseudoscalar dalitz decay; and (5) first observation of {eta}' Dalitz decay, {rho}-{omega} interference via e{sup +}e{sup -} channel.
Date:
December 1, 2011
Creator:
Weygand, Dennis
Object Type:
Article
System:
The UNT Digital Library
B meson decays to charmless meson pairs containing eta or eta'
The authors present updated measurements of the branching fractions for B{sup 0} meson decays to {eta}K{sup 0}, {eta}{eta}, {eta}{phi}, {eta}{omega}, {eta}{prime}K{sup 0}, {eta}{prime}{eta}{prime}, {eta}{prime}, {phi}, and {eta}{prime}{omega} and branching fractions and CP-violating charge asymmetries for B{sup +} decays to {eta}{pi}{sup +}, {eta}K{sup +}, {eta}{prime}{pi}{sup +}, and {eta}{prime} K{sup +}. The data represent the full dataset of 467 x 10{sup 6} B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at the SLAC National Accelerator Laboratory. Besides large signals for the four charged B decays modes and for B{sup 0} {yields} {eta}{prime}K{sup 0}, they find evidence for three B{sup 0} decays modes at greater than 3.0{sigma} significance. They find {Beta}(B{sup 0} {yields} {eta}K{sup 0}) = (1.15{sub -0.38}{sup +0.43} {+-} 0.09) x 10{sup -6}, {Beta}(B{sup 0} {yields} {eta}{omega}) = (0.94{sub -0.30}{sup +0.35} {+-} 0.09) x 10{sup -6}, and {Beta}(B{sup 0} {yields} {eta}{prime}{omega}) = (1.01{sub -0.38}{sup +0.46} {+-} 0.09) x 10{sup -6}, where the first (second) uncertainty is statistical (systematic). For the B{sup +} {yields} {eta}K{sup +} decay mode, they measure the charge asymmetry {Alpha}{sub ch} (B{sup +} {yields} {eta}K{sup +}) = -0.36 {+-} 0.11 {+-} 0.03.
Date:
December 14, 2009
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Nineteenth annual actinide separations conference: Conference program and abstracts
This report contains the abstracts from the conference presentations. Sessions were divided into the following topics: Waste treatment; Spent fuel treatment; Issues and responses to Defense Nuclear Facility Safety Board 94-1; Pyrochemical technologies; Disposition technologies; and Aqueous separation technologies.
Date:
December 31, 1995
Creator:
Bronson, M.
Object Type:
Article
System:
The UNT Digital Library
Plasma Suppression of Large Scale Structure Formation in the Universe
We point out that during the reionization epoch of the cosmic history, the plasma collective effect among the ordinary matter would suppress the large scale structure formation. The imperfect Debye shielding at finite temperature would induce a residual long-range electrostatic potential which, working together with the baryon thermal pressure, would counter the gravitational collapse. As a result the effective Jean's length, {tilde {lambda}}{sub J}, is increased by a factor, {tilde {lambda}}{sub J}/{lambda}{sub J} = {radical}8/5, relative to the conventional one. For scales smaller than the effective Jean's scale the plasma would oscillate at the ion-acoustic frequency. The modes that would be influenced by this effect depend on the starting time and the initial temperature of reionization, but roughly lie in the range 0.5hMpc{sup -1} < k, which corresponds to the region of the Lyman-{alpha} forest from the inter-galactic medium. We predict that in the linear regime of density-contrast growth, the plasma suppression of the matter power spectrum would approach 1 - ({Omega}{sub dm}/{Omega}{sub m}){sup 2} {approx} 1 -(5/6){sup 2} {approx} 30%.
Date:
December 10, 2007
Creator:
Chen, Pisin & Lai, Kwang-Chang
Object Type:
Article
System:
The UNT Digital Library
Integrated Data Base report--1993: U.S. spent nuclear fuel and radioactive waste inventories, projections, and characteristics. Revision 10
The Integrated Data Base Program has compiled historic data on inventories and characteristics of both commercial and DOE spent nuclear fuel; also, commercial and US government-owned radioactive wastes through December 31, 1993. These data are based on the most reliable information available from government sources, the open literature, technical reports, and direct contacts. The information forecasted is consistent with the latest US Department of Energy/Energy Information Administration projections of US commercial nuclear power growth and the expected DOE-related and private industrial and institutional activities. The radioactive materials considered, on a chapter-by-chapter basis, are spent nuclear fuel, high-level waste, transuranic waste, low-level waste, commercial uranium mill tailings, DOE Environmental Restoration Program wastes, commercial reactor and fuel-cycle facility decommissioning wastes, and mixed (hazardous and radioactive) low-level waste. For most of these categories, current and projected inventories are given the calendar-year 2030, and the radioactivity and thermal power are calculated based on reported or estimated isotopic compositions. In addition, characteristics and current inventories are reported for miscellaneous radioactive materials that may require geologic disposal. 256 refs., 38 figs., 141 tabs.
Date:
December 1, 1994
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Experimental study of fission counter design optimization with a simplified analytical model of performance
Trends inferred from this study of fission counter design confirm previously known relationships between design variables and counter performance. Most important is the proved existence of an optimum electrode spacing for a specific design that increases with electrode area and decreases with gamma dose rate. The PD product also has an optimum value, with low values being limited by the presence of electronic noise and high values by enhanced gamma pileup. Conventional 50-..cap omega.. signal cables do not always provide the best performance, particularly for large-area counters that have high interelectrode capacitances and operate in high gamma background. Values as low as 16.7 ..cap omega.. yield an improvement of as much as 20%. The performance of a counter closely follows the E/P versus drift velocity characteristic of its gas mixture, and is superior for fill gases having higher electron drift velocities. The optimum filter time constant of the counting channel depends on the gamma background dose rate. At low gamma levels, when electronic noise dominates, longer filter time constants give better signal-to-noise ratios. Counters with shorter collection times more effectively suppress the gamma pileup at high dose rates, and filters with higher break-frequencies process the faster pulses more effectively. Another …
Date:
December 1, 1979
Creator:
Valentine, K. H.; De Lorenzo, J. T.; Clay, W. T.; Pare, V. K.; Guerrant, G. C. & Burns, R. S.
Object Type:
Report
System:
The UNT Digital Library