776 Matching Results

Search Results

Results: 1 - 24 next
open access

Reconciliation Report

Description: Reconciliation report with an ending account balance of $2,398.57 reconciled for the period ending on December 31, 2002.
Date: January 22, 2003
Partner: UNT Libraries Special Collections
open access

The Impact of Humidity, Temperature and Ultraviolet Light on the Near-Field Environmental Fate of Pinacolyl Alcohol, Methyl Iodide, Methylphosphonic Dichloride (DCMP) and Thionyl Chloride Using an Environmental Wind Tunnel

Description: Understanding the near-field fate of parent chemicals and their decay products in the atmosphere provides essential information for the development of remote chemical sensors. To elucidate the near-field fate of candidate chemical signatures, selected gas phase compounds were introduced into atmospheres of varying humidity, temperature and incident light flux. These atmospheres were maintained in an environmental wind tunnel for periods typical of near-field transport scenarios. The range of hu… more
Date: January 24, 2003
Creator: Driver, Crystal J.; Johnson, Timothy J.; Su, Yin-Fong; Alexander, M. Lizabeth; Fellows, Robert J.; Magnuson, Jon K. et al.
Partner: UNT Libraries Government Documents Department
open access

Retrieval and Pipeline Transfer Assessment of Hanford Tank 241-AN-105 Waste

Description: This study assesses five steps for Tank 241-AN-105 waste retrieval and subsequent pipeline transfer: 1. Remove supernatant liquid waste from AN-105 and transfer it through a pipeline with inline dilution with water (1st liquid waste transfer). 2. Add water (as a diluent) to Tank AN-105. 3. Mix the saltcake waste and water with mixer pumps to dissolve soluble solids. 4. Let undissolved solids settle to the tank bottom. 5. Remove the resulting supernatant liquid waste from Tank AN-105 (2nd liquid… more
Date: January 15, 2003
Creator: Onishi, Yasuo; Tingey, Joel M.; Recknagle, Kurtis P.; Liu, Jun; Terrones, Guillermo; Yokuda, Satoru T. et al.
Partner: UNT Libraries Government Documents Department
open access

IGPP 1999-2000 Annual Report

Description: The Institute of Geophysics and Planetary Physics (IGPP) is a Multicampus Research Unit of the University of California (UC). IGPP was founded in 1946 at UC Los Angeles with a charter to further research in the earth and planetary sciences and related fields. The Institute now has branches at UC campuses in Irvine, Los Angeles, San Diego, Santa Cruz and Riverside, and at Los Alamos National Laboratory and Lawrence Livermore National Laboratory. The University-wide IGPP has played an important r… more
Date: January 27, 2003
Creator: Ryerson, F J; Cook, K & Hitchcock, B
Partner: UNT Libraries Government Documents Department
open access

Ultrasonic Examination of Double-Shell Tank 241-AN-105 Examination Completed September 2002

Description: COGEMA Engineering Corporation (COGEMA), under contract from CH2M Hill Hanford Group (CH2M Hill), has performed an ultrasonic examination of selected portions of Double-Shell Tank 241-AN-105. The purpose of this examination was to provide information that could be used to evaluate the integrity of the wall of the primary tank. The requirements for the ultrasonic examination of Tank 241-AN-105 were to detect, characterize, (idetify, size, and locate), and recod measurements made of any wall thin… more
Date: January 3, 2003
Creator: Pardini, Allan F. (BATTELLE (PACIFIC NW LAB)) & Posakony, Gerald J. (BATTELLE (PACIFIC NW LAB))
Partner: UNT Libraries Government Documents Department
open access

Femtosecond Laser Synthesis of Multi-Element Nanocrystals

Description: We studied the conditions under which short-pulsed laser deposited (PLD) stoichiometric multi-element nanocrystals of GaAs,InP,CoPt and Inconel (an alloy of Cr, Fe and Ni) are formed. The properties of the PLD nanoclusters and the irradiated targets were investigated as a function of the laser pulse-length (150 fs-500 ps) and the inert background gas pressure in the synthesis chamber (microTorr to hundreds of Torr). Our results reveal that the formation of stoichiometric GaAs nanocrystals requi… more
Date: January 8, 2003
Creator: Dinh, L N; Trelenberg, T; Torralva, B; Stuart, B C & Balooch, M
Partner: UNT Libraries Government Documents Department
open access

Tests of the Contamination Analysis Unit, Phase 2

Description: Results are reported for a project testing the capabilities of a mass spectrometer-based system for analyzing in-situ organic compounds on a variety of substrates. The system, which was built and operated at Lawrence Livermore National Laboratory (LLNL), is termed a Contamination Analysis Unit (CAU) and employs vacuum and thermal desorption of surface residues, followed by ionization and analysis with a Leybold Inficon Transpector mass spectrometer. The CAU was employed in this study to examine… more
Date: January 21, 2003
Creator: Meltzer, M
Partner: UNT Libraries Government Documents Department
open access

New Technology Demonstration of the Whole-Building Diagnostician at the Federal Aviation Administration-Denver Airport

Description: This report describes results from an evaluation of the Whole Building Diagnostician's (WBD) ability to automatically and continually diagnose operational problems in building air handlers at the Federal Aviation Administration's Denver airport.
Date: January 17, 2003
Creator: Pratt, Robert G.; Bauman, Nathan N. & Katipamula, Srinivas
Partner: UNT Libraries Government Documents Department
open access

Hyperspectral Image-Based Broad Area Search (HIBAS) Final Report Summary

Description: Two of the more important tasks faced by image analysts are broad area search and site monitoring. In each case, the objective is to detect occurrences of targets of interest (e.g., buildings, mobile targets of military significance, etc.). In broad area search, large swaths of countryside are imaged. In site monitoring, a number of smaller areas of interest are imaged multiple times. The crisis currently facing image analysts lies in their inability to analyze massive volumes of remotely sense… more
Date: January 7, 2003
Creator: Paglieroni, D W
Partner: UNT Libraries Government Documents Department
open access

Comparison of Synchrotron X-Ray Fluorescence Mapping and Micro-XANES to Bulk X-Ray Absorption Spectra in Metal-Contaminated Sediments

Description: Synchrotron X-ray absorption spectroscopy (XAS) is one of the few techniques that can supply molecular-scale information for a variety of elements at concentrations relevant to natural systems in non-vacuum conditions. Bulk XAS analysis supplies the dominant chemical bonding mode(s) for a specific element. In complex materials such as natural soils and sediments, however, the dominant mode may not necessarily be the most reactive because changes in speciation at surfaces may results in changes … more
Date: January 16, 2003
Creator: O'Day, P; Carroll, S A & Bajt, S
Partner: UNT Libraries Government Documents Department
open access

Fiber Optic Solutions for Short Pulse Lasers

Description: For applications requiring high beam quality radiation from efficient, compact and rugged sources, diffraction limited fiber lasers are ideal, and to date have been demonstrated at average CW power levels exceeding 100 W with near diffraction limited: output. For conventional single-core step-index single-mode fibers, this power level represents the sealing limit because of nonlinear and laser damage considerations. Higher average powers would exceed nonlinear process thresholds such as the Ram… more
Date: January 29, 2003
Creator: Beach, R; Dawson, J; Liao, Z; Jovanovic, I; Wattellier, B; Payne, S et al.
Partner: UNT Libraries Government Documents Department
open access

First Quarter Hanford Seismic Report for Fiscal year 2003

Description: This reports earthqaukes that occurred during the first quarter of FY03.
Date: January 15, 2003
Creator: Hartshorn, Donald C.; Reidel, Steve P. & Rohay, Alan C.
Partner: UNT Libraries Government Documents Department
open access

Using Mode of Action to Assess Health Risks from Mixtures of Chemical/Physical Agents

Description: Interactions between tumor promoters with differing mechanisms of action were examined in male B6C3F1 mice treated with mixtures of dichloroacetate (DCA), trichloroacetate (TCA), and tetrachloride (CT), each of which acts by a different mode of action. Mice were initiated by vinyl carbamate (VC), and then promoted by DCA, TCA, CT, or the pair-wised combinations of the three compounds. The effect of each treatment or treatment combination on tumor number/animal and tumor size was individually as… more
Date: January 20, 2003
Creator: Bull, Richard J.; Lei, Xingye C. & Sasser, Lyle B.
Partner: UNT Libraries Government Documents Department
open access

Characterization of Tru Inventories in G and H Cells, 327 Building using a Neutron Instrument Pod

Description: An instrument pod has been designed and constructed to estimate the quantity of TRU isotopes present in hot cells in Hanfords 327 Building. This estimate is required to assign the proper waste classification for ultimate disposal of the hot cell. The instrument pod consists of a cylindrical polyethylene moderator containing three neutron detectors. The pod diameter was chosen to allow the pod to be deployed through a 7-inch port in the hot cell wall. A polyethylene traverse pipe, long enough to… more
Date: January 2003
Creator: Scherpelz, Robert I.; Mapili, Gabriel M. & Dutt, Dale S.
Partner: UNT Libraries Government Documents Department
open access

A Case Study of Selected Photographic Inspection Techniques for a Transparency Regime

Description: Photographic inspection techniques have become technically more sophisticated in recent years with the development of advanced equipment for the mass consumer market. High quality digital cameras, for example, are now available around the world. Combined with an appropriate image analysis program on a personal computer, there is now the ability to produce and analyze high quality photographs with a modest level of resources. This report is the summary of a variety of efforts, all aimed at inves… more
Date: January 22, 2003
Creator: Pitts, W K.; Dahl, Nicole M.; Fuller, Erin S.; Geelhood, Bruce D.; Hansen, Randy R.; Knopf, Michael A. et al.
Partner: UNT Libraries Government Documents Department
open access

Radiation Transmission Measurements for Demron Fabric

Description: Radiation Shield Technologies has requested a measurement survey of its Demron fabric to determine the shielding properties in the x-ray, gamma ray and beta particle emissions in the range of energies relevant to clinical and Homeland Security applications. It is important to perform a detailed measurement program in order to sort out the shielding properties of this material in light of the often-times complex spectra emitted by standard radio-nuclides and x-ray generators. Low energy portions… more
Date: January 7, 2003
Creator: Friedman, H & Singh, M S
Partner: UNT Libraries Government Documents Department
open access

Stuffing Carbon Away: Mechanisms of Carbon Sequestration in Soils

Description: Soils offer the potential to sequester large quantities of carbon from the atmosphere for decades to millennia and so may ameliorate the anthropogenic influence of fossil fuel release. However changes in climate can drastically affect the soil's ability to store carbon through changes mineralogy on time scales of human interest. It is essential to understand the major controls on soil carbon dynamics before we attempt to manage sequestration to control atmospheric CO{sub 2} buildup. Models of t… more
Date: January 24, 2003
Creator: Reimer, P J; Masiello, C A; Southon, J R; Trumbore, S E; Harden, J W; White, A F et al.
Partner: UNT Libraries Government Documents Department
open access

Radar Imaging of Spheres in 3D using MUSIC

Description: We have shown that multiple spheres can be imaged by linear and planar EM arrays using only one component of polarization. The imaging approach involves calculating the SVD of the scattering response matrix, selecting a subset of singular values that represents noise, and evaluating the MUSIC functional. The noise threshold applied to the spectrum of singular values for optimal performance is typically around 1%. The resulting signal subspace includes more than one singular value per sphere. Th… more
Date: January 21, 2003
Creator: Chambers, D H & Berryman, J G
Partner: UNT Libraries Government Documents Department
open access

Level II Milestone Review of LLNL Program on Grain-Scale Dynamics in Explosives

Description: This document describes an evaluation of the Level II Milestone achievements of the LLNL program on Grain-Scale Dynamics in Explosives on January 14, 2003. ''The Grain-Scale Dynamics in Explosives Program'' is a mixture of advanced computational methodology and physico-chemical theory applied to understanding deflagration and detonation of plastic-bonded explosives from the nano to the macro scales. At many points, the modeling is tied directly to experiments within the precisions of both. Adva… more
Date: January 14, 2003
Creator: Nicol, M F; Benson, D J & Yip, S
Partner: UNT Libraries Government Documents Department
open access

Laser-Material Interaction of Powerful Ultrashort Laser Pulses

Description: Laser-material interaction of powerful (up to a terawatt) ultrashort (several picoseconds or shorter) laser pulses and laser-induced effects were investigated theoretically in this dissertation. Since the ultrashort laser pulse (USLP) duration time is much smaller than the characteristic time of the hydrodynamic expansion and thermal diffusion, the interaction occurs at a solid-like material density with most of the light energy absorbed in a thin surface layer. Powerful USLP creates hot, high-… more
Date: January 6, 2003
Creator: Komashko, A
Partner: UNT Libraries Government Documents Department
open access

Mechanistic Constitutive Models for Rubber Elasticity and Viscoelasticity

Description: Physically based models which describe the finite strain behavior of vulcanized rubber are developed. Constitutive laws for elasticity and viscoelasticity are derived by integrating over orientation space the forces due to each individual polymer chain. A novel scheme is presented which effectively approximates these integrals in terms of strain and strain invariants. In addition, the details involving the implementation of such models into a quasi-static large strain finite element formulation… more
Date: January 21, 2003
Creator: Puso, M
Partner: UNT Libraries Government Documents Department
open access

FY02 Engineering Technology Reports Volume 1: Technology Base

Description: Engineering has touched on every challenge, every accomplishment, and every endeavor of Lawrence Livermore National Laboratory during its fifty-year history. In this time of transition to new leadership, Engineering continues to be central to the mission of the Laboratory, returning to the tradition and core values of E. O. Lawrence: science-based engineering--turning scientific concepts into reality. This volume of Engineering Technical Reports summarizes progress on the projects funded for te… more
Date: January 28, 2003
Creator: Minichino, C & Meeker, D
Partner: UNT Libraries Government Documents Department
open access

Implementation of the AES as a Hash Function for Confirming the Identity of Software on a Computer System

Description: This paper provides a brief overview of the implementation of the Advanced Encryption Standard (AES) as a hash function for confirming the identity of software resident on a computer system. The PNNL Software Authentication team chose to use a hash function to confirm software identity on a system for situations where: (1) there is limited time to perform the confirmation and (2) access to the system is restricted to keyboard or thumbwheel input and output can only be displayed on a monitor. PN… more
Date: January 20, 2003
Creator: Hansen, Randy R.; Bass, Robert B.; Kouzes, Richard T. & Mileson, Nicholas D.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen