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SSA Disability: Other Programs May Provide Lessons for Improving Return-to-Work Efforts

Description: Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed how disability systems in the private sector and other countries encourage and facilitate return to work in three key areas: (1) the eligibility assessment process; (2) work incentives; and (3) staffing practices."
Date: July 13, 2000
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Wong's equations and the small x effective action in QCD

Description: We propose a new form for the small x effective action in QCD. This form of the effective action is motivated by Wong's equations for classical, colored particles in non-Abelian background fields. We show that the BFKL equation, which sums leading logarithms in x, is efficiently reproduced with this form of the action. We argue that this form of the action may be particularly useful in computing next-to-leading-order results in QCD at small x.
Date: July 13, 2000
Creator: Jalilian-Marian, Jamal; Jeon, Sangyong & Venugopalan, Raju
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Safety Analysis Report for packaging (onsite) steel waste package

Description: The steel waste package is used primarily for the shipment of remote-handled radioactive waste from the 324 Building to the 200 Area for interim storage. The steel waste package is authorized for shipment of transuranic isotopes. The maximum allowable radioactive material that is authorized is 500,000 Ci. This exceeds the highway route controlled quantity (3,000 A{sub 2}s) and is a type B packaging.
Date: July 13, 2000
Creator: BOEHNKE, W.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CSER 00-003 Criticality Safety Evaluation report for PFP Magnesium Hydroxide Precipitation Process for Plutonium Stabilization Glovebox 3

Description: This Criticality Safety Evaluation Report analyzes the stabilization of plutonium/uranium solutions in Glovebox 3 using the magnesium hydroxide precipitation process at PFP. The process covered are the receipt of diluted plutonium solutions into three precipitation tanks, the precipitation of plutonium from the solution, the filtering of the plutonium precipitate from the solution, the scraping of the precipitate from the filter into boats, and the initial drying of the precipitated slurry on a… more
Date: July 13, 2000
Creator: LAN, J.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Remote Maintenance Design Guide for Compact Processing Units

Description: Oak Ridge National Laboratory (ORNL) Robotics and Process Systems (RPSD) personnel have extensive experience working with remotely operated and maintained systems. These systems require expert knowledge in teleoperation, human factors, telerobotics, and other robotic devices so that remote equipment may be manipulated, operated, serviced, surveyed, and moved about in a hazardous environment. The RPSD staff has a wealth of experience in this area, including knowledge in the broad topics of human… more
Date: July 13, 2000
Creator: Draper, J.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The AERI/GOES Retrievals Versus Radiosondes for Driving SCMs

Description: Single-Column Models (SCMs) require observations to provide suitable initial and boundary conditions. To meet this need, the Atmospheric Radiation Measurement (ARM) program conducts Intensive Observing Periods (IOPs) to provide 3-hourly radiosondes and other observations. However, such high-frequency sonde launches can be expensive. Therefore, the ARM program can only support a couple IOPs each year with each one lasting 2-4 weeks. In order to reduce the need for high-frequency sonde launches a… more
Date: July 13, 2000
Creator: Xie, S. C.; Cederwell, R. T.; Yio, J. J.; Feltz, W. F.; Turner, D. D. & Zhang, M. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Behavior of Dense, Immiscible Solvents in Fractured Clay-rich Soils

Description: This research program addresses the nature and distribution of chlorinated solvent DNAPL sources in fractured clays and weathered shales, and the potential for natural attenuation of plumes derived from these sources. Specific objectives include: (1) Investigate the factors controlling migration of chlorinated solvent DNAPLs in fine-grained, highly structured soils and weathered shale bedrock. (2) Investigate the influence of ''matrix diffusion'' on the dissolution and apparent disappearance of… more
Date: July 13, 2000
Creator: McKay, Larry D.; Sanseverino, John; Jardine, Phillip M.; Brooks, Scott C.; Cherry, John A. & Parker, Beth L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interfacial Dislocations and Deformation Twinning in Fully Lamellar TiAl

Description: Deformation twinning, which takes place abnormally within lamellar TiAl subjected to creep deformation at strain rates as low as 10{sup -7}, has been found to be intimately related to the motion, pileup and dissociation of interfacial (Shockley partial) dislocations. In this study, results of in-situ TEM observations are presented to verify the motion and pileup of interfacial dislocations. Since the interfacial (Shockley partial) dislocations are energetically unfavorable to undergo cross-slip… more
Date: July 13, 2000
Creator: Hsiung, L. M.; Choi, B. W. & Nieh, T. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Magnetoconductance of Independently Tunable Tunnel-Coupled Double Quantum Wires

Description: The authors report on their recent experimental studies of vertically-coupled quantum point contacts subject to in-plane magnetic fields. Using a novel flip-chip technique, mutually aligned split gates on both sides of a sub micron thick double quantum well heterostructure define a closely-coupled pair of ballistic one-dimensional (1D) constrictions. They observe quantized conductance steps due to each quantum well and demonstrate independent control of each ID constriction width. In addition, … more
Date: July 13, 2000
Creator: Blount, Mark A.; Moon, J. S.; Simmons, Jerry A.; Lyo, Sungkwun K.; Wendt, Joel R. & Reno, John L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Theory, simulation, and experimental studies of zonal flows

Description: The authors report on current theoretical understanding of the characteristics of self-generated zonal flows as observed in nonlinear gyrokinetic simulations of toroidal ITG turbulence [Science 281, 1835 (1998)], and discuss various possibilities for experimental measurements of signature of zonal flows.
Date: July 13, 2000
Creator: Hahm, T. S.; K.H.Burrell; Z.Lin; Nazikian, R. & Synakowski, E.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Love-Wave Biosensors Using Cross-Linked Polymer Waveguides on LiTaO{sub 3} Substrates

Description: The design and performance of Love-wave sensors using cross-linked poly-(methyl methacrylate) waveguides of thickness of 0.3--3.2 {micro}m on LiTaO{sub 3} substrates are described. It is found that this layer-substrate combination provides sufficient waveguidance, and electrical isolation of the IDTs from the liquid environment to achieve low acoustic loss and distortion. In bio-sensing experiments, mass sensitivity up to 1,420 Hz/(ng/mm{sup 2}) is demonstrated.
Date: July 13, 2000
Creator: BENDER,FLORIAN; CERNOSEK,RICHARD W. & JOSSE,F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dynamics of Exchange at Gas-Zeolite Interfaces 1: Pure Component n-Butane and Isobutane

Description: The authors present the results of molecular dynamics simulations of n-butane and isobutane in silicalite. They begin with a comparison of the bulk adsorption and diffusion properties for two different parameterizations of the interaction potential between the hydrocarbon species, both of which have been shown to reproduce experimental gas-liquid coexistence curves. They examine diffusion as a function of the loading of the zeolite, as well as the temperature dependence of the diffusion constan… more
Date: July 13, 2000
Creator: Chandross, Michael E.; Webb, Edmund B., III; Grest, Gary S.; Martin, Marcus G.; Thompson, Aidan P. & Roth, M. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The role of women in sustainable energy development

Description: This paper explores the question of how sustainable energy development--specifically, decentralized renewable energy technologies--can complement and benefit from the goal of increasing women's role in development. It is based on a paper that was originally presented at the World Renewable Energy Congress-V held in Florence, Italy, in September 1998, as a contribution to the National Renewable Energy Laboratory's program on gender and energy.
Date: July 13, 2000
Creator: Cecelski, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fabrication of Diffractive Optical Elements for an Integrated Compact Optical-MEMS Laser Scanner

Description: The authors describe the microfabrication of a multi-level diffractive optical element (DOE) onto a micro-electromechanical system (MEMS) as a key element in an integrated compact optical-MEMS laser scanner. The DOE is a four-level off-axis microlens fabricated onto a movable polysilicon shuttle. The microlens is patterned by electron beam lithography and etched by reactive ion beam etching. The DOE was fabricated on two generations of MEMS components. The first generation design uses a shuttle… more
Date: July 13, 2000
Creator: WENDT,JOEL R.; KRYGOWSKI,T.W.; VAWTER,GREGORY A.; SPAHN,OLGA B.; SWEATT,WILLIAM C.; WARREN,MIAL E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface Morphology Changes During Pb Deposition on Cu(100): Evidence for Surface Alloyed Cu(100)-c(2x2) Pb

Description: Using Low Energy Electron Microscopy (LEEM), the authors have followed Cu(100) surface morphology changes during Pb deposition at different temperatures. Surface steps advance and 2-D islands nucleate and grow as deposited Pb first alloys, and then dealloys, on a 125 C Cu(100)surface. From LEEM images, they determine how much Cu is being displaced at each stage and find that the amount of material added to the top layer for a complete Pb/Cu(100) c(4x4) reconstruction (a surface alloy) is consis… more
Date: July 13, 2000
Creator: Plass, Richard A. & Kellogg, Gary Lee
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Heme Distortions in Sperm-Whale Carbonmonoxy Myoglobin: Correlations between Rotational Strengths and Heme Distortions in MD-Generated Structures

Description: The authors have investigated the effects of heme rotational isomerism in sperm-whale carbonmonoxy myoglobin using computational techniques. Several molecular dynamics simulations have been performed for the two rotational isomers A and B, which are related by a 180{degree} rotation around the {alpha}-{gamma} axis of the heme, of sperm-whale carbonmonoxy myoglobin in water. Both neutron diffraction and NMR structures were used as starting structures. In the absence of an experimental structure,… more
Date: July 13, 2000
Creator: Kiefl, Christoph; Screerama, Narasimha; Lu, Yi; Qiu, Yan; Shelnutt, John A. & Woody, Robert W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of the Nuclear Hyperfine Field on the 2D Electron Conductivity in the Quantum Hall Regime

Description: The effect of the nuclear hyperfine interaction on the dc conductivity of 2D electrons under quantum Hall effect conditions at filling factor v= 1 is observed for the first time. The local hyperfine field enhanced by dynamic nuclear polarization is monitored via the Overhauser shift of the 2D conduction electron spin resonance in AlGaAs/GaAs multiquantum-well samples. The experimentally observed change in the dc conductivity resulting from dynamic nuclear polarization is in agreement with a the… more
Date: July 13, 2000
Creator: Vitkalov, S.A.; Bowers, C.R.; Simmons, Jerry A. & Reno, John L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Precision metrology of NSTX surfaces using coherent laser radar ranging

Description: A frequency modulated Coherent Laser Radar ranging diagnostic is being used on the National Spherical Torus Experiment (NSTX) for precision metrology. The distance (range) between the 1.5 {micro}m laser source and the target is measured by the shift in frequency of the linearly modulated beam reflected off the target. The range can be measured to a precision of < 100{micro}m at distances of up to 22 meters. A description is given of the geometry and procedure for measuring NSTX interior and … more
Date: July 13, 2000
Creator: Kugel, H.W.; Loesser, D.; Roquemore, A. L.; Menon, M. M. & Barry, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetic Anticrossing of 1D Subbands in Coupled Ballistic Double Quantum Wires

Description: We study the low-temperature in-plane magnetoconductance of vertically coupled double quantum wires. Using a novel flip-chip technique, the wires are defined by two pairs of mutually aligned split gates on opposite sides of a s 1 micron thick AlGaAs/GaAs double quantum well heterostructure. We observe quantized conductance steps due to each quantum well and demonstrate independent control of each ID wire. A broad dip in the magnetoconductance at -6 T is observed when a magnetic field is applied… more
Date: July 13, 2000
Creator: Blount, Mark A.; Moon, Jeong-Sun; Simmons, Jerry A.; Lyo, Sungkwun K.; Wendt, Joel R. & Reno, John L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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