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Altus Times (Altus, Okla.), Vol. 100, No. 218, Ed. 1 Tuesday, November 30, 1999
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 30, 1999
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Anticipated dose to workers for Plutonium Stabilization and Handling at PFP Project W-460
Report provides estimates of expected whole body and extremity radiological dose to workers conducting planned Pu stabilization and packaging operations at PFP.
Date:
November 30, 1999
Creator:
Lilly, J. T.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 26, Ed. 1 Tuesday, November 30, 1999
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 1999
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 94, No. 96, Ed. 1 Tuesday, November 30, 1999
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 1999
Creator:
Keasling, Edna & Fierro, Jennifer
Object Type:
Newspaper
System:
The Portal to Texas History
Clean-up progress at the SNL/NM Classified Waste Landfill
The Sandia National Laboratories/New Mexico (SNL/NM)Environmental Restoration Project is currently excavating the Classified Waste Landfill in Technical Area II, a disposal area for weapon components for approximately 40 years until it closed in 1987. Many different types of classified parts were disposed in unlined trenches and pits throughout the course of the landfill's history. A percentage of the parts contain explosives and/or radioactive components or contamination. The excavation has progressed backward chronologically from the last trenches filled through to the earlier pits. Excavation commenced in March 1998, and approximately 75 percent of the site (as defined by geophysical anomalies) has been completed as of November 1999. The material excavated consists primarily of classified weapon assemblies and related components, so disposition must include demilitarization and sanitization. This has resulted in substantial waste minimization and cost avoidance for the project as upwards of 90 percent of the classified materials are being demilitarized and recycled. The project is using field screening and lab analysis in conjunction with preliminary and in-process risk assessments to characterize soil and make waste determinations in a timely a fashion as possible. Challenges in waste management have prompted the adoption of innovative solutions. The hand-picked crew (both management and …
Date:
November 30, 1999
Creator:
Slavin, Paula J. & Galloway, R. Bob
Object Type:
Article
System:
The UNT Digital Library
Confined Zone Dispersion Project: A DOE assessment
The goal of the US Department of Energy (DOE) Clean Coal Technology (CCT) program is to furnish the energy marketplace with a number of advanced, more efficient, and environmentally responsible coal utilization technologies through demonstration projects. These projects seek to establish the commercial feasibility of the most promising advanced coal technologies that have developed beyond the proof-of-concept (POC) stage. This document serves as a DOE post-project assessment of the Confined Zone Dispersion Project in CCT Round 3. In 1990, Bechtel Corporation entered into a cooperative agreement to conduct the demonstration project. The Seward Power Station of Pennsylvania Electric Company (now GPU Genco) was the host site. DOE funded 43 percent of the total project cost of $12,173,000. The project was started in June 1990 and was scheduled to be completed in June 1993. As a result of various operating problems, the schedule was extended into 1994 without additional cost to DOE. Bechtel provided the additional financing and GPU Genco provided electricity, steam, and water to operate the unit. The independent evaluation contained herein is based primarily on information from Bechtel's final technical report (1994) as well as other references cited. Confined Zone Dispersion (CZD) is a flue gas desulfurization (FGD) …
Date:
November 30, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Direct Conversion Fission Reactor for the Period September 1,1999 Through November 31,1999
OAK-B135 DIRECT CONVERSION FISSION REACTOR FOR THE PERIOD SEPTEMBER 1,1999 THROUGH NOVEMBER 31,1999
Date:
November 30, 1999
Creator:
Brown, L. C.
Object Type:
Report
System:
The UNT Digital Library
Distributed design tools: Mapping targeted design tools onto a Web-based distributed architecture for high-performance computing
Design Tools use a Web-based Java interface to guide a product designer through the design-to-analysis cycle for a specific, well-constrained design problem. When these Design Tools are mapped onto a Web-based distributed architecture for high-performance computing, the result is a family of Distributed Design Tools (DDTs). The software components that enable this mapping consist of a Task Sequencer, a generic Script Execution Service, and the storage of both data and metadata in an active, object-oriented database called the Product Database Operator (PDO). The benefits of DDTs include improved security, reliability, scalability (in both problem size and computing hardware), robustness, and reusability. In addition, access to the PDO unlocks its wide range of services for distributed components, such as lookup and launch capability, persistent shared memory for communication between cooperating services, state management, event notification, and archival of design-to-analysis session data.
Date:
November 30, 1999
Creator:
Holmes, V. P.; Linebarger, J. M.; Miller, D. J. & Poore, C. A.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 1999-11-30 - Spectrum 2
Access:
Use of this item is restricted to the UNT Community
Ensemble performance at the UNT College of Music Recital Hall.
Date:
November 30, 1999
Creator:
unknown
Object Type:
Sound
System:
The UNT Digital Library
Ensemble: 1999-11-30 - UNT Concert Choir
Access:
Use of this item is restricted to the UNT Community
Concert presented at Winspear Hall at the Murchison Performing Arts Center.
Date:
November 30, 1999
Creator:
University of North Texas. Concert Choir.
Object Type:
Sound
System:
The UNT Digital Library
Enterphase Integrity of Neutron Irradiated SiC Composites
SiC/SiC composites were fabricated from Hi-Nicalon{trademark} fibers with carbon, porous SiC and multilayer SiC interphases. These materials were then irradiated in the High Flux Beam Reactor with fast neutrons at 260 and 900-1060 degrees C to a dose of 1.1X10{sup 25} n/m{sup 2} corresponding to 1.1 displacements per atom (dpa). Results are presented for bend strength of both non-irradiated and irradiated materials. Within the interphases studied the multilayer SiC interphase material showed the least degradation (8-20%) in ultimate bend stress, while porous SiC underwent the greatest degradation ({approximately}35%). The Fiber matrix interphases are studied with TEM for both nonirradiated and irradiated materials. While no irradiation induced microstructural evolution of the interphase was observed, debonding of the interphase from the fiber was observed for all cases. This debonding is attributed to tensile stresses developed at the interface due to densification of the Hi-Nicalon{trademark} fiber. Residual stress analysis of the fiber matrix interface indicates that the irradiation-induced densification of Hi-Nicalon{trademark} and the volumetric expansion of the CVD SiC matrix cause tensile stresses well in excess of those which can be withstood by these, or any other viable SiC composite interphase.
Date:
November 30, 1999
Creator:
Lara-Curzio, E. & Snead, L.L.
Object Type:
Article
System:
The UNT Digital Library
Exchange bias in Fe/Cr double superlattices.
Utilizing the oscillatory interlayer exchange coupling in Fe/Cr superlattices, we have constructed ''double superlattice'' structures where a ferromagnetic (F) and an antiferromagnetic (AF) Fe/Cr superlattice are coupled through a Cr spacer. The minor hysteresis loops in the magnetization are shifted from zero field, i.e., the F superlattice is exchange biased by the AF one. The double superlattices are sputter-deposited with (211) epitaxy and possess uniaxial in-plane magnetic anisotropy. The magnitude of the bias field is satisfactorily described by the classic formula for collinear spin structures. The coherent structure and insensitivity to atomic-scale roughness makes it possible to determine the spin distribution by polarized neutron reflectivity, which confirms that the spin structure is collinear. The magnetic reversal behavior of the double superlattices suggests that a realistic model of exchange bias needs to address the process of nucleating local reverse domains.
Date:
November 30, 1999
Creator:
Jiang, J. S.; Felcher, G. P.; Inomata, A.; Goyette, R.; Nelson, C. & Bader, S. D.
Object Type:
Article
System:
The UNT Digital Library
EXELFS of Metallic Glasses
The feasibility of using extended energy-loss fine structure (EXELFS) obtained from {approximately}1 nm regions of metallic glasses to study their short-range order has been examined. Ionization edges of the metallic glasses in the electron energy-loss spectrum (EELS) have been obtained from PdNiP bulk metallic glass and Ni{sub 2}P polycrystalline powder in a transmission electron microscope. The complexity of EXELFS analysis of L- and M-ionization edges of heavy elements (Z>22, i.e. Ni and Pd) is addressed by theoretical calculations using an ab initio computer code, and its results are compared with the experimental data.
Date:
November 30, 1999
Creator:
Ito, Y.; Alamgir, F. M.; Schwarz, R. B.; Jain, H. & Williams, D. B.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, November 30, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 30, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
FANTM, the First Article NIF Test Module
Designing and developing the 1.7 to 2.1-MJ Power Conditioning System (PCS), that will power the flashlamps of the main and power amplifiers for the National Ignition Facility (NIF) lasers, is one of several responsibilities assumed by Sandia National Labs (SNL) in support of the NIF Project. Maxwell Physics International has been a partner in this process. The NIF is currently being constructed at Lawrence Livermore National Labs (LLNL). The test facility that has evolved over the last three years to satisfy the project requirements is called FANTM, for the First Article NIF Test Module. It was built at SNL and operated for about 17,000 shots to demonstrate component performance expectations over the lifetime of NIF. A few modules similar to the one shown in Fig. 1 will be used initially in the amplifier test phase of the project. The final full NIF system will require at least 192 of them in four capacitor bays. This paper briefly summarizes the final design of the FANTM facility and compares its performance with the predictions of circuit simulations for both normal operation and fault-mode response. Applying both the measured and modeled power pulse waveforms as input to a physics-based, semi-empirical amplifier gain code …
Date:
November 30, 1999
Creator:
Hammon, Jud; Harjes, Henry C.; Moore, William B. S.; Smith, David L. & Wilson, J. Michael
Object Type:
Article
System:
The UNT Digital Library
The Harper Herald (Harper, Tex.), Vol. 69, No. 144, Ed. 1 Tuesday, November 30, 1999
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 1999
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
Interview with Judy Matthews, November 30, 1999
A videorecording of an interview with Judy Matthews, conducted by Dr. Gary McCaleb of Abilene Christian University. In the interview, Mrs. Matthews discusses her family's early history in the settling of the area around Abilene, Texas. The video is part of the Abilene 2000 Series of McCaleb & Company videos.
Date:
November 30, 1999
Creator:
Matthews, Julia Jones & McCaleb, Gary
Object Type:
Video
System:
The Portal to Texas History
Intrinsic and extrinsic magnetic properties of the naturally layered manganites
Structural and magnetic properties of the two-layered Ruddlesden-Popper phase SrO(La{sub 1{minus}x}Sr{sub x}MnO{sub 3}){sub 2} with x = 0.3--0.5 are highlighted. Intrinsic properties of these naturally layered manganites include a colossal magnetoresistance, a composition-dependent magnetic anisotropy, and almost no remanence. Above the Curie temperature there is a non-vanishing extrinsic magnetization attributed to intergrowths (stacking faults in the layered structure). These lattice imperfections consist of additional or missing manganite layers, as observed in transmission electron microscopy. Their role in influencing the properties of the host material is highlighted.
Date:
November 30, 1999
Creator:
Berger, A.; Mitchell, J. F.; Miller, D. J.; Jiang, J. S. & Bader, S. D.
Object Type:
Article
System:
The UNT Digital Library
Investigation of Mixed Metal Sorbent / Catalysts for the Simultaneous Removal of Sulfur and Nitrogen Oxides
Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. The work done at PETC and the DOE-funded research of the investigators on the sulfation and regeneration of alumina-supported cerium oxide sorbents have shown that they can perform well at relatively high temperatures (823-900 K) as regenerable desulfurization sorbents. Survey of the recent literature shows that addition of copper oxide to ceria lowers the sulfation temperature of ceria down to 773 K, sulfated ceria-based sorbents can function as selective SCR catalysts even at elevated temperatures, SO{sub 2} can be directly reduced to sulfur by CO on CuO-ceria catalysts, and ceria-based catalysts may have a potential for selective catalytic reduction of NO{sub x} by methane. These observations indicate a possibility of developing a ceria-based sorbent/catalyst which can remove both SO{sub 2} and NO{sub x} from flue gases within a relatively wide temperature window, produce significant amounts of elemental sulfur during regeneration, and use methane for the selective catalytic reduction of NO{sub x}. …
Date:
November 30, 1999
Creator:
Akyurtlu, Ates & Akyurtlu, Jale F.
Object Type:
Report
System:
The UNT Digital Library
Local Probe into the Atomic Structure of Metallic Glasses using EELS
Electron energy loss spectroscopy (EELS) is used to extract information on the topological arrangement of atoms around Pd in the bulk-glass-forming Pd{sub 60}Ni{sub 20}P{sub 20}. It is found that the environment around Pd in the glass is only a slight modification of the Pd crystalline structure. However, the modification is enough to allow this alloy to form a glass in bulk. In examining the differences between the structure of crystalline Pd and glassy Pd{sub 60}Ni{sub 20}P{sub 20} it is concluded that incorporation of Ni and P into the structure frustrates the structure enough that glass formation becomes easy.
Date:
November 30, 1999
Creator:
Alamgir, F. M.; Ito, Y.; Schwarz, R. B.; Jain, H. & Williams, D. B.
Object Type:
Article
System:
The UNT Digital Library
Mass Spectrometry with Cryogenic Detectors
None
Date:
November 30, 1999
Creator:
Frank, M.
Object Type:
Article
System:
The UNT Digital Library
Method of Forming Diamonds from Carbonaceous Material
A method for producing diamonds is provided comprising exposing carbonaceous material to ion irradiation at ambient temperature and pressure.
Date:
November 30, 1999
Creator:
Daulton, Tyrone; Lewis, Roy; Rehn, Lynn & Kirk, Marquis
Object Type:
Patent
System:
The UNT Digital Library
Microstructure and Phase Development of Buried Resistors in Low Temperature Co-Fired Ceramic
Embedded resistor circuits have been generated with the use of a Micropen system Ag conductor paste (DuPont 6142D), a new experimental resistor ink from DuPont (E84005-140), and Low Temperature Co-fired Ceramic (LTCC) green tape (DuPont A951). Sample circuits were processed under varying peak temperature ranges (835 C-875 C) and peak soak times (10 min-720 min). Resistors were characterized by SEM, TEM, EDS, and high-temperature XRD. Results indicate that devitrification of resistor glass phase to Celcian, Hexacelcian, and a Zinc-silicate phase occurred in the firing ranges used (835-875 C) but kinetics of divitrification vary substantially over this temperature range. The resistor material appears structurally and chemically compatible with the LTCC. RuO{sub 2} grains do not significantly react with the devitrifying matrix material during processing. RuO{sub 2} grains coarsen significantly with extended time and temperature and the electrical properties appear to be strongly affected by the change in RuO{sub 2} grain size.
Date:
November 30, 1999
Creator:
Dimos, Duane B.; Kotula, Paul G.; Rodriguez, Mark A. & Yang, Pin
Object Type:
Article
System:
The UNT Digital Library
Microstructure evolution in irradiated materials
Study the interaction of defects produced during irradiation or deformation of a metal with the microstructure of that particular material, such as dislocations and grain boundaries. In particular we will study the interaction of dislocation with interstitial loops and stacking fault tetrahedral, and the production of displacement cascades close to dislocations and grain boundaries. The data obtained from these simulations will be used as input to diffusion models and dislocation dynamics models.
Date:
November 30, 1999
Creator:
Caturla, M
Object Type:
Report
System:
The UNT Digital Library