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Time Reversal Signal Processing in Communications - A Feasibility Study

Description: A typical communications channel is subjected to a variety of signal distortions, including multipath, that corrupt the information being transmitted and reduce the effective channel capacity. The mitigation of the multipath interference component is an ongoing concern for communication systems operating in complex environments such as might be experienced inside buildings, urban environments, and hilly or heavily wooded areas. Communications between mobile units and distributed sensors, so imp… more
Date: January 30, 2002
Creator: Meyer, A W; Candy, J V & Poggio, A J
Partner: UNT Libraries Government Documents Department
open access

Final ROI Report - Technology Transfer of Waste-Reducing Groundwater Sampling Systems

Description: This report presents the findings of a U.S. DOE Environmental Management technology transfer initiative of waste-reducing ground water sampling systems between Savannah River Site (SRS) and Lawrence Livermore National Laboratory (LLNL) which occurred during fiscal years 2001 and 2002. The report describes the collaboration between the two sites, the deployment of the Savannah River Site Purge Water Management System at LLNL, the changes made to that system for use at LLNL, and documents the ret… more
Date: September 30, 2002
Creator: Noyes, Charles; Howard, Greg; Bishop, Dorothy; Tuckfield, Cary & Hiergesell, Robert
Partner: UNT Libraries Government Documents Department
open access

A Catalog of Vadose Zone Hydraulic Properties for the Hanford Site

Description: To predict contaminant release to the groundwater, it is necessary to understand the hydraulic properties of the material between the release point and the water table. Measurements of the hydraulic properties of the Hanford unsaturated sediments that buffer the water table are available from many areas of the site; however, the documentation is not well cataloged nor is it easily accessible. The purpose of this report is to identify what data is available for characterization of the unsaturate… more
Date: September 30, 2002
Creator: Freeman, Eugene J.; Khaleel, Raziuddin & Heller, Paula R.
Partner: UNT Libraries Government Documents Department
open access

Metal Oxides in the Environment

Description: Oxides are ubiquitous in much of environmental chemistry. Silica and related glasses are potential vehicles by which radioactive elements may be sequestered and stored. The migration of toxic waste in ground water is largely influenced by interactions at the liquid-solid interface, with several metal oxides making up the bulk of soil. In addition, metal oxides with Bronsted acid or Lewis base functionality are potential replacements for many traditional liquid catalysis that are hazardous to wo… more
Date: August 30, 2002
Creator: Jonsson, Hannes; Corrales, L. Rene; Gabriel, Peggy; Haw, James F.; Henkelman, Graeme A.; Neurock, Matthew et al.
Partner: UNT Libraries Government Documents Department
open access

Report on Radiation Damage Effects in a Titanium Target Under Photon Irradiation

Description: Following the same approach as with the W-Re targets [l], we have calculated the damage induced by photon irradiation (22.1 MeV average energy) in titanium targets. Stefan Roesler calculated, using FLUKA [2] the spallation products, neutrons and fission products from the interaction of the photons with the titanium target. Using these initial values of energies and positions, we calculated the number of defects produced per incoming photon. It should be noted that the threshold displacement ene… more
Date: August 30, 2002
Creator: Caturla, M J; Roesler, S; Bharadwaj, V K; Schultz, D C; Sheppard, J C; Marian, J et al.
Partner: UNT Libraries Government Documents Department
open access

Material Balance Assessment for Double-Shell Tank Waste Pipeline Transfer

Description: PNNL developed a material balance assessment methodology based on conservation of mass for detecting leaks and mis-routings in pipeline transfer of double-shell tank waste at Hanford. The main factors causing uncertainty in these transfers are variable property and tank conditions of density, existence of crust, and surface disturbance due to mixer pump operation during the waste transfer. The methodology was applied to three waste transfers from Tanks AN-105 and AZ-102.
Date: October 30, 2002
Creator: Onishi, Yasuo; Wells, Beric E.; Hartley, Stacey A.; Enderlin, Carl W. & White, Mike
Partner: UNT Libraries Government Documents Department
open access

A study on D0 Run2b stave structural performance

Description: Two different structural solutions have been proposed and studied for the D0 Run2b stave. The way the stave structural stiffness is achieved in both designs is essentially the same: the structural material is displaced as far as possible from the neutral axis in order to increase the bending moment of the stave. The agreement of the measured data with what has been theoretically predicted is excellent. The C channel stave with dog-bones glued on top of the sensor (stave No.2) has outperformed t… more
Date: April 30, 2002
Creator: Lanfranco, Giobatta
Partner: UNT Libraries Government Documents Department
open access

Effects of Globally Waste-Disturbing Activities on Gas Generation, Retention, and Release in Hanford Waste Tanks

Description: Various operations are authorized in Hanford single-shell and double-shell tanks that disturb all or a large fraction of the waste. These globally waste-disturbing activities have the potential to release a significant volume of retained gas. Analyses are presented for expected gas release mechanisms and the potential release rates and volumes resulting from these activities. Recommendations for gas monitoring and assessment of the potential for changes in tank classification and steady-state f… more
Date: August 30, 2002
Creator: Stewart, Charles W. (BATTELLE (PACIFIC NW LAB)); Huckaby, James L. (BATTELLE (PACIFIC NW LAB)) & Meyer, Perry A. (BATTELLE (PACIFIC NW LAB))
Partner: UNT Libraries Government Documents Department
open access

Astrophysical and Astrochemical Insights into the Origin of Life

Description: Nucleosynthesis of heavy elements such as carbon in stars allowed the formation of organic molecules in space, which appear to be widespread in our Galaxy. The physical and chemical conditions - including density, temperature, ultraviolet radiation and energetic particles - determine reaction pathways and the complexity of organic molecules in different space environments. Dense interstellar clouds are the birth sites of stars of all masses and their planetary systems. During the protostellar c… more
Date: April 30, 2002
Creator: Ehrenfreund, P; Becker, L; Blank, J; Brucato, J; Colangeli, L; Derenne, S et al.
Partner: UNT Libraries Government Documents Department
open access

A Catalog of Geologic Data for the Hanford Site

Description: This is the first update of the catalog that was published in 2001. This report catalogs the existing geologic data that can be found in various databases, published and unpublished reports, and in individuals' technical files. The scope of this catalog is primarily on the 100, 200, and 300 Areas, with a particular emphasis on the 200 Areas. Over 2,922 wells are included in the catalog. Nearly all of these wells (2,459) have some form of driller's or geologist's log. Archived samples are availa… more
Date: September 30, 2002
Creator: Horton, Duane G.; Last, George V.; Gilmore, Tyler J. & Bjornstad, Bruce N.
Partner: UNT Libraries Government Documents Department
open access

Mechanistic Process Modeling for Subsurface Remediation

Description: The goal of this project was to develop the first generation of models that fully address the coupling of dominant processes controlling the behavior of fluid, chemical and biological components in the subsurface. The large memory and computational performance of multiprocessor computing architectures would be exploited to provide modeling capabilities with unprecedented process detail and resolution to assess new scientific hypotheses, assist with experimental design, and to evaluate environme… more
Date: August 30, 2002
Creator: Yabusaki, Steven B.; Bryant, Steven L.; Chen, Shi-Yi; Fann, George I.; Flach, Gregory P.; Gray, William G. et al.
Partner: UNT Libraries Government Documents Department
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Geologic and Wireline Summaries from Fiscal Year 2002 ILAW Boreholes

Description: Four boreholes were drilled at the Immobilized Low-Activity Waste Disposal Site in April 2002. Three were completed as groundwater monitoring wells. This report documents the results of the drilling and data collected from the drilling.
Date: September 30, 2002
Creator: Reidel, Steve P. & Ho, Anita M.
Partner: UNT Libraries Government Documents Department
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Final Report on Materials Characterization for the Wetted Cathodes for Low-Temperature Aluminum Smelting Program

Description: This report is a summary of materials characterization results on twenty cathode samples that were used in a novel aluminum reduction cell at the Northwest Aluminum Technologies laboratory. Most of these cathodes were based on the TiB2 composition and showed very little corrosion as a result of testing. Most of the samples also showed good wetting by Al metal that formed during cell operation.
Date: October 30, 2002
Creator: Windisch, Charles F.
Partner: UNT Libraries Government Documents Department
open access

Technology Demonstration of Magnetically-Coupled Adjustable Speed Drive Systems

Description: This document presents the findings of a technology demonstration for magnetically-coupled adjustable speed drives. Although many devices can provide speed control in motor systems, the two devices evaluated were chosen for their unique packaging for specific applications. The U.S. Department of Energy and Pacific Northwest National Laboratory do not specifically endorse or sponsor the devices or manufacturers described in this study, other than to present the specific data collected during thi… more
Date: June 30, 2002
Creator: Chvala, William D., Jr.; Winiarski, David W. & Mulkerin, Michael C.
Partner: UNT Libraries Government Documents Department
open access

Grain-scale Dynamics in Explosives

Description: High explosives can have reactions to external stimuli that range from mild pressure bursts to full detonation. The ability to predict these responses is important for understanding the performance as well as the safety and reliability of these important materials. At present, we have only relatively simple phenomenological computational models for the behavior of high explosives under these conditions. These models are limited by the assumption that the explosive can be treated as homogeneous.… more
Date: September 30, 2002
Creator: Reaugh, J E
Partner: UNT Libraries Government Documents Department
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LDRD Final Report for''Tactical Laser Weapons for Defense'' SI (Tracking Code 01-SI-011)

Description: The focus of this project was a convincing demonstration of two new technological approaches to high beam quality; high average power solid-state laser systems that would be of interest for tactical laser weapon applications. Two pathways had been identified to such systems that built on existing thin disk and fiber laser technologies. This SI was used as seed funding to further develop and vet these ideas. Significantly, the LLNL specific enhancements to these proposed technology paths were sp… more
Date: January 30, 2002
Creator: Beach, R & Zapata, L
Partner: UNT Libraries Government Documents Department
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LDRD 99-ERI-010 Final Report: Sapphire: Scalable Pattern Recognition for Large-Scale Scientific Data Mining

Description: There is a rapidly widening gap between our ability to collect data and our ability to explore, analyze, and understand the data. As a result, useful information is overlooked, and the potential benefits of increased computational and data gathering capabilities only partially realized. This problem of data overload is becoming a serious impediment to scientific advancement in areas as diverse as counter-proliferation, the Accelerated Strategic Computing Initiative (ASCI), astrophysics, compute… more
Date: January 30, 2002
Creator: Kamath, C
Partner: UNT Libraries Government Documents Department
open access

Data Quality Objectives Summary Report - Designing a Groundwater Monitoring Network for the 200-BP-5 and 200-PO-1 Operable Units

Description: This document presents the results of a series of interviews held with technical, management, and regulatory staff to determine the groundwater data quality objectives (DQOs) for monitoring activities associated with the 200-BP-5 and 200-PO-1 operable units located in the Hanford Site 200 East Area. This assessment is needed to address changing contaminant plume conditions (e.g., plume migration) and to ensure that monitoring activities meet the requirements for performance monitoring as prescr… more
Date: September 30, 2002
Creator: Thornton, Edward C. & Lindberg, Jon W.
Partner: UNT Libraries Government Documents Department
open access

Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms

Description: The waste in Hanford tanks generates a mixture of flammable gases and releases it into the tank headspace. The potential hazard resulting from flammable gas generation requires that controls be established to prevent ignition and halt operations if gas concentrations reach levels of concern. In cases where only hydrogen is monitored, a control limit of 6,250 ppm hydrogen has been in use at Hanford for several years. The hydrogen-based control limit is intended to conservatively represent 25% of… more
Date: November 30, 2002
Creator: Mahoney, Lenna A. & Stewart, Charles W.
Partner: UNT Libraries Government Documents Department
open access

Hanford Contaminant Distribution Coefficient Database and Users Guide

Description: This report compiles in a single source the Kd values measured with Hanford sediment for radionuclides and toxic compounds that have the greatest potential for driving risk to human health and safety in the vadose zone and groundwater at the Hanford Site.
Date: May 30, 2002
Creator: Cantrell, Kirk J.; Serne, R. Jeffrey & Last, George V.
Partner: UNT Libraries Government Documents Department
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The Terascale Simulation Tools and Technologies Center Annual Report August 15, 2001-September 30, 2002

Description: The overall goal of the TSTT Center is to enable the scientific community to more easily use modern high-order, adaptive, parallel mesh and discretization tools. To achieve this goal, we are following three distinct but related paths. The first is to work directly with a number of lead application teams (for the most part SciDAC-funded) to use such technologies in their application domains. The second is to create new technology that eases the use of such tools, not only for our designated appl… more
Date: September 30, 2002
Creator: Glimm, James; Brown, David L. & Freitag, Lori
Partner: UNT Libraries Government Documents Department
open access

Radionuclide Concentrations in Air on the Hanford Site

Description: This report describes the air pathway effects of Hanford Site operations from 1991 through 2000 on local air quality.
Date: May 30, 2002
Creator: Fritz, Brad G. & Patton, Gregory W.
Partner: UNT Libraries Government Documents Department
open access

Reactive Behavior of K-Basin Spent Nuclear Fuel

Description: The Hanford Spent Nuclear Fuel Project focuses its efforts on determining how to safely move the degraded N-Reactor spent fuel from water-stored basins to a dry storage facility. Based on the laboratory data, the project chose to use a conservative enhancement factor in analyzing the oxidation behavior of the spent metallic fuel. However, there is a need for the project to increase the fuel throughput for the drying treatment process by implementing certain design optimization steps. The study … more
Date: September 30, 2002
Creator: Abrefah, John; Siciliano, Edward R.; Damschen, Dennis W. & Schlahta, Stephan N.
Partner: UNT Libraries Government Documents Department
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TDNA Monthly Office Manager's Report: December 2002

Description: Monthly report written by the Texas Daily Newspaper Association's (TDNA's) office manager, Darla Thompson, to Phil Berkebile providing a summary of revenues and account balances, programs, meetings, and other activities in the office during the previous month.
Date: December 30, 2002
Creator: Thompson, Darla
Partner: UNT Libraries Special Collections
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