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478 Matching Results
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Altus Times (Altus, Okla.), Vol. 99, No. 243, Ed. 1 Wednesday, December 23, 1998
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Cole, Carol
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, December 23, 1998
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 46, Ed. 1 Wednesday, December 23, 1998
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Brookhaven National Laboratory Groundwater Protection Management Program Description.
None
Date:
December 23, 1998
Creator:
Paquette, D. E.; Naymik, T. G. & Flores, E. A.
Object Type:
Report
System:
The UNT Digital Library
Brookhaven National Laboratory Groundwater Protection Management Program Description.
None
Date:
December 23, 1998
Creator:
Paquette, Douglas E.; Naymik, Thomas G. & Flores, Elizabeth A.
Object Type:
Report
System:
The UNT Digital Library
CALDERON COKEMAKING PROCESS/DEMONSTRATION PROJECT
This project deals with the demonstration of a coking process using proprietary technology of Calderon, with the following objectives geared to facilitate commercialization: (1) making coke of such quality as to be suitable for use in hard-driving, large blast furnaces; (2) providing proof that such process is continuous and environmentally closed to prevent emissions; (3) demonstrating that high-coking-pressure (non-traditional) coal blends which cannot be safely charged into conventional by-product coke ovens can be used in the Calderon process; and (4) demonstrating that coke can be produced economically, at a level competitive with coke imports. The activities of the past quarter were focused on the following: Conducting bench-scale tests to produce coke and acceptable tar from the process to satisfy Koppers, a prospective stakeholder; Consolidation of the project team players to execute the full size commercial cokemaking reactor demonstration; and Progress made in advancing the design of the full size commercial cokemaking reactor.
Date:
December 23, 1998
Creator:
Calderon, Albert
Object Type:
Report
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 103, No. 102, Ed. 1 Wednesday, December 23, 1998
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Colony Courier (The Colony, Tex.), Vol. 2, No. 7, Ed. 1 Wednesday, December 23, 1998
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Sorter, Dave
Object Type:
Newspaper
System:
The Portal to Texas History
Computer Simulation of Grain Growth Kinetics with Solute Drag
The effects of solute dragon grain growth kinetics were studied in two dimensional (2-D) computer simulations by using a diffuse-interface field model. It is shown that, in the low velocity / low driving force regime, the velocity of a grain boundary motion departs from a linear relation with driving force (curvature) with solute drag. The nonlinear relation of migration velocity and driving force comes from the dependence of grain boundary energy and width on the curvature. The growth exponent m of power growth law for a polycrystalline system is affected by the segregation of solutes to grain boundaries. With the solute drag, the growth exponent m can take any value between 2 and 3 depending on the ratio of lattice diffusion to grain boundary mobility. The grain size and topological distributions are unaffected by solute drag, which are the same as those in a pure system.
Date:
December 23, 1998
Creator:
Chen, L.; Chen, S. P. & Fan, D.
Object Type:
Article
System:
The UNT Digital Library
Construction Costs of Six Landfill Cover Designs
A large-scale field demonstration comparing and contrasting final landfill cover designs has been constructed and is currently being monitored. Four alternative cover designs and two conventional designs (a RCRA Subtitle `D' Soil Cover and a RCRA Subtitle `C' Compacted Clay Cover) were constructed side-by-side for direct comparison. The demonstration is intended to evaluate the various cover designs based on their respective water balance performance, ease and reliability of construction, and cost. This paper provides an overview of the construction costs of each cover design.
Date:
December 23, 1998
Creator:
Dwyer, S. F.
Object Type:
Report
System:
The UNT Digital Library
Craters produced on metals by single ion impacts.
Single ion impacts have been observed using in-situ transmission electron microscopy during irradiation. In addition to internal defects, single-ion impacts create surface craters as large as 12 nm on In, Ag, Pb and Au. Crater formation rates have been determined from video recordings with a time-resolution of 33 milliseconds. The cratering rate for Xe ions increases linearly with increasing target mass density above a threshold density of approximately 7 gm/cm{sup 3}. The cratering rate increases as the ion mass is increased. These results suggest that cratering requires a high energy-density, near-surface displacement cascade. TRIM calculations have been made in an effort to establish a near-surface energy-density criterion for cratering.
Date:
December 23, 1998
Creator:
Birtcher, R. C.
Object Type:
Article
System:
The UNT Digital Library
Direct Molecular Simulation of Gradient-Driven Diffusion of Large Molecules using Constant Pressure
Dual control volume grand canonical molecular dynamics (DCV-GCMD) is a boundary-driven non-equilibrium molecular dynamics technique for simulating gradient driven diffusion in multi-component systems. Two control volumes are established at opposite ends of the simulation box. Constant temperature and chemical potential of diffusing species are imposed in the control volumes. This results in stable chemical potential gradients and steady-state diffusion fluxes in the region between the control volumes. We present results and detailed analysis for a new constant-pressure variant of the DCV-GCMD method in which one of the diffusing species for which a steady-state diffusion flux exists does not have to be inserted or deIeted. Constant temperature, pressure and chemical potential of all diffusing species except one are imposed in the control volumes. The constant-pressure method can be applied to situations in which insertion and deletion of large molecules would be prohibitively difficult. As an exampIe, we used the method to shnulate diffusion in a biruuy mixture of spherical particles with a 2:1 size ratio. Steady-state diffusion fluxes of both diffbsi.ng species were established. The constant-pressure diffision coefficients agreed closely with the results of the standard constant-volume calculations. In addition, we show how the concentration, chemical potential and flux profiles can …
Date:
December 23, 1998
Creator:
Heffelfinger, G. S. & Thompson, A. P.
Object Type:
Article
System:
The UNT Digital Library
The Dublin Citizen (Dublin, Tex.), Vol. 9, No. 17, Ed. 1 Wednesday, December 23, 1998
Weekly newspaper from Dublin, Texas that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Wright, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
Effect of Inert Gas Additive Species on Cl(2) High Density Plasma Etching of Compound Semiconductors: Part 1. GaAs and GaSb
The role of the inert gas additive (He, Ar, Xe) to C12 Inductively Coupled Plasmas for dry etching of GaAs and GaSb was examined through the effect on etch rate, surface roughness and near-surface stoichiometry. The etch rates for both materials go through a maximum with Clz 0/0 in each type of discharge (C12/'He, C12/Ar, C12/Xc), reflecting the need to have efficient ion-assisted resorption of the etch products. Etch yields initially increase strongly with source power as the chlorine neutral density increases, but decrease again at high powers as the etching becomes reactant-limited. The etched surfaces are generally smoother with Ax or Xe addition, and maintain their stoichiometry.
Date:
December 23, 1998
Creator:
Abernathy, C.R.; Cho, H.; Hahn, Y.B.; Hays, D.C.; Jung, K.B.; Pearton, S.J. et al.
Object Type:
Article
System:
The UNT Digital Library
The effects of uranium oxide high-level waste on the structure of iron phosphate glasses.
Because of their unusually good chemical durability, iron phosphate glasses are a natural candidate for a nuclear waste disposal glass. We have studied the effects of UO{sub 2} high-level waste on the structure of iron phosphate glasses with both neutron and high-energy x-ray diffraction using the GLAD instrument of the Intense Pulsed Neutron Source and the 1-BM bending magnet beamline of the Advanced Photon Source, respectively. The results of neutron scattering, which is mostly sensitive to correlations involving light atoms i.e. O-O, Fe-O and P-O, suggest the main structural features of the base glass are largely unaffected by the addition of UO{sub 2}. The nearest-neighbor P-O, Fe-O and O-O peaks remain at the same position in real space and their intensities scale approximately with concentration. These findings are consistent with the earlier results of Raman scattering and EXAFS on the Fe-K edge wherein both cases the spectra remain similar to the base glass. High-energy x-ray scattering which is sensitive to correlations involving the heavier atoms and thus complements the neutron measurements, is also consistent with uranium occupying interstitial sites in the relatively undisturbed base glass structure. However, important questions remain as to the precise local structure and oxidation state of …
Date:
December 23, 1998
Creator:
Badyal, Y.
Object Type:
Article
System:
The UNT Digital Library
The Emergency Agricultural Provisions in the FY1999 Omnibus Appropriations Act
None
Date:
December 23, 1998
Creator:
Chite, Ralph M.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, December 23, 1998
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
First principles calculations for lithiated manganese oxides.
First principles calculations within the local-spin-density-functional theory (LSDFF) framework are presented of densities of electronic states for MnO, LiMnO{sub 2} in the monoclinic and orthorhombic structures, cubic LiMn{sub 2}O{sub 4} spinel and {lambda}-MnO{sub 2} (delithiated spinel), all in antiferromagnetic spin configurations. The changes in energy spectra as the Mn oxidation state varies between 2+ and 4+ are illustrated. Preliminary calculations for Co-doped LiMnO{sub 2} are presented, and the destabilization of a monoclinic relative to a rhombohedral structure is discussed.
Date:
December 23, 1998
Creator:
Prasad, R.
Object Type:
Article
System:
The UNT Digital Library
Illustrated Paperboy (Cleveland, Tex.), Vol. 6, No. 39, Ed. 1 Wednesday, December 23, 1998
Weekly newspaper from Cleveland, Texas that includes local, county, and state news along with extensive advertising.
Date:
December 23, 1998
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Ion Channeling Analysis of Gallium Nitride Implanted with Deuterium
Ion channeling and transmission electron microscopy were used to examine the microstructure of GaN implanted with deuterium (D) at high (>1 at. %) and low (< 0.1 at. %) D concentrations. At high concentrations, bubbles and basal-plane stacking faults were observed. Ion channeling showed the D was disordered relative to the GaN lattice, consistent with precipitation of D2 into bubbles. At low D concentrations, bubbles and stacking faults are absent and ion channeling shows that a large fraction of the D occupies sites near the center of the c-axis channel.
Date:
December 23, 1998
Creator:
Myers, S. M. & Wampler, W. R.
Object Type:
Article
System:
The UNT Digital Library
Iraq: U.S. Policy Options
None
Date:
December 23, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The magnetic and diagnostic systems for the Advanced Photon Source self-amplified spontaneously emitting FEL.
A self-amplified spontaneously emitting (SASE) free-electron laser (FEL) for the visible-to-ultraviolet spectral range is under construction at the Advanced Photon Source at Argonne National Laboratory. The amplifier part of the FEL consists of twelve identical 2.7-meter-long sections. Each section includes a 2.4-meter-long, 33-mm-period hybrid undulator, a quadruple lens, and a set of electron beam and radiation diagnostics equipment. The undulatory will operate at a fixed magnetic gap (approx. 9.3 mm) with K=3.1. The electron beam position will be monitored using capacitive beam position monitors, YAG scintillators with imaging optics, and secondary emission detectors. The spatial distribution of the photon beam will be monitored by position sensitive detectors equipped with narrow-band filters. A high-resolution spectrograph will be used to observe the spectral distribution of the FEL radiation.
Date:
December 23, 1998
Creator:
Gluskin, E.
Object Type:
Article
System:
The UNT Digital Library
Mannford Eagle (Mannford, Okla.), Vol. 17, No. 43, Ed. 1 Wednesday, December 23, 1998
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
Retherford, Bill R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mannford Star (Mannford, Okla.), Vol. 5, No. 16, Ed. 1 Wednesday, December 23, 1998
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 23, 1998
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History