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[Regular and Chaotic Dynamics With Applications in Nonlinear Optics]. Final Report

Description: The following major pieces of work were completed under the sponsorship of this grant: (1) singular perturbation theory for dynamical systems; (2) homoclinic orbits and chaotic dynamics in second-harmonic generating, optically pumped, passive optical cavities; (3) chaotic dynamics in short ring-laser cavities; (4) homoclinic orbits in moderately-long ring-laser cavities; (5) finite-dimensional attractor in ring-laser cavities; (6) turbulent dynamics in long ring-laser cavities; (7) bifurcations… more
Date: October 12, 1998
Creator: Kovacic, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

D0 Solenoid Commissioning September 1998

Description: D-Zero installed a new 2 Tesla superconducting solenoid magnet into the central tracking region of the D-Zero detector. This report documents the cryogenic performance of the superconducting solenoid during its first cryogenic operation at Fermilab. By necessity, the liquid helium refrigerator was also operated. This was the second time the refrigerator plant has been operated. The refrigerator's performance is also documented herein.
Date: October 12, 1998
Creator: Rucinski, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stabilization of in-tank residual wastes and external tank soil contamination for the Hanford tank closure program: application to the AX tank farm

Description: Mixed high-level waste is currently stored in underground tanks at the US Department of Energy's (DOE's) Hanford Site. The plan is to retrieve the waste, process the water, and dispose of the waste in a manner that will provide less long-term health risk. The AX Tank Farm has been identified for purposes of demonstration. Not all the waste can be retrieved from the tanks and some waste has leaked from these tanks into the underlying soil. Retrieval of this waste could result in additional leaka… more
Date: October 12, 1998
Creator: SONNICHSEN, J.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanisms and modeling of single-event upset

Description: The basic mechanisms of single-event upset are reviewed, including charge collection in silicon junctions and transistors, and properties of single-event upset in CMOS static random access memory (SRAM) cells. The mechanisms are illustrated through the use of three-dimensional device and circuit simulations. Technology trends and implications for commercial devices are discussed.
Date: October 12, 1998
Creator: Dodd, Paul E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Interaction between point defects and edge dislocation in BCC iron

Description: We present results of atomistic simulations of the interaction between self interstitial atoms and vacancies with edge dislocations in BCC iron. The calculations are carried out using molecular dynamics with an energy minimization scheme based on the quasi-Newton approach and use the Finnis-Sinclair interatomic potential for BCC iron developed by Ackland et al. Large anisotropy in the strain field of self interstitials is observed and it causes strong interaction with edge dislocations even whe… more
Date: October 12, 1998
Creator: Diaz de la Rubia, T. & Shastry, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Status Report on the Spallation Neutron Source

Description: The purpose of the Spallation Neutron Source Project (SNS) is to generate low-energy neutrons (ambient [{approximately}200 meV] and cold [{approximately}50 meV]) which can be used by up to 18 neutron beam lines to study the structure and functionality of materials. The neutrons are generated by the spallation process initiated by the interactions of 1-GeV protons with a Hg target. These neutrons are reflected by a Pb reflector and are moderated by 2 water (ambient) and 2 super critical hydrogen… more
Date: October 12, 1998
Creator: Gabriel, T.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Forming uniform HD layers in shells using infrared radiation

Description: Generating a volumetric heat source in solid deuterium hydride, HD, allows the formation of a spherical crystalline shell of HD inside a transparent plastic shell. Pumping the infra-red (IR) collisionally induced vibration-rotation band of solid HD contained inside a transparent plastic shell generates the volumetric heat source in the HD lattice. HD layers 150 - 250 {micro}m thick formed near the triple point have a surface roughness rms between l-3 {micro}m and become rougher with decreasing … more
Date: October 12, 1998
Creator: Bittner, D N; Collins, G W; Letts, S & Monsler, E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Stainless Steel Foil with Improved Creep-Resistance for Use in Primary Surface Recuperators for Gas Turbine Engines

Description: Primary surface recuperators (PSRs) are compact heat-exchangers made from thin-foil type 347 austenitic stainless steel, which boost the efficiency of land-based gas turbine engines. Solar Turbines uses foil folded into a unique corrugated pattern to maximize the primary surface area for efficient heat transfer between hot exhaust gas on one side, and the compressor discharge air on the other side of the foil. Allegheny-Ludlum produces 0.003 - 0.0035 in. thick foil for a range of current turbin… more
Date: October 12, 1998
Creator: Browning, P. F.; Fitzpatrick, M.; Grubb, J. F.; Klug, R. C.; Maziasz, P. J.; Montague, J. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Elastic wave propagation and attenuation in a double-porosity dual-permeability medium

Description: To account for large-volume low-permeability storage porosity and low-volume high-permeability fracture/crack porosity in oil and gas reservoirs, phenomenological equations for the poroelastic behavior of a double porosity medium have been formulated and the coefficients in these linear equations identified. The generalization from a single porosity model increases the number of independent inertial coefficients from three to six, the number of independent drag coefficients from three to six, a… more
Date: October 12, 1998
Creator: Berryman, J.G. & Wang, H.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electron beam charge state amplifier (EBQA)--a conceptual evaluation.

Description: A concept is presented for stripping low-energy, radioactive ions from 1+ to higher charge states. Referred to as an Electron Beam Charge State Amplifier (EBQA), this device accepts a continuous beam of singly-charged, radioactive ions and passes them through a high-density electron beam confined by a solenoidal magnetic field. Singly-charged ions may be extracted from standard Isotope-Separator-Online (ISOL) sources. An EBQA is potentially useful for increasing the charge state of ions prior t… more
Date: October 12, 1998
Creator: Dooling, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Regional-scale influences on urban air quality : a field study in Phoenix, Arizona.

Description: Regional air quality can play an important role in determining whether urban ozone or PM-2.5 standards are exceeded. Background levels of nitrogen oxide species (NO{sub x}) and their interactions with natural organics can generate secondary aerosol products via formation of nitric acid and its subsequent reaction with ammonia to form ammonium nitrate. Natural organics and reactive anthropogenic organic compounds, particularly aromatic species and monoterpenes, can also lead to the formation of … more
Date: October 12, 1998
Creator: Gaffney, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling of dry deposition over regional scales with use of satellite data.

Description: Dry deposition, an essential component in the atmospheric budget of many trace chemicals, can deliver a major portion of the chemicals deposited at sensitive receptors at the surface of the Earth. Dry deposition in atmospheric numerical models is often described with modules that provide estimates of the deposition velocity V{sub d}, which is the downward flux divided by concentration at a specified height. A fairly common practice in dry deposition modules is to describe surface conditions tha… more
Date: October 12, 1998
Creator: Xu, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Technical Report, Grant DE-FG02-91ER45443: Heavy Fermions and Other Highly Correlated Electron Systems

Description: Properties of highly correlated electrons, such as heavy fermion compounds, metal-insulator transitions, one-dimensional conductors and systems of restricted dimensionality are studied theoretically. The main focus is on Kondo insulators and impurity bands due to Kondo holes, the low-temperature magnetoresistivity of heavy fermion alloys, the n-channel Kondo problem, mesoscopic systems and one-dimensional conductors.
Date: October 12, 1998
Creator: Schlottmann, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Gay Attack]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story about charges against Aaron McKinney and Russel Henderson regarding a hateful murder of Matt Shephard.
Date: October 12, 1998, 5:00 p.m.
Duration: 1 minute 32 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
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