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Defense Space Activities: Continuation of Evolved Expendable Launch Vehicle Program's Progress to Date Subject to Some Uncertainty

Description: Correspondence issued by the General Accounting Office with an abstract that begins "The U.S. space policy states that access to and use of space is critical to preserving peace and protecting U.S. national security and also benefits the country's civil and commercial interests. Air Force guidance explains further that access to space requires the ability to launch critical space assets, when needed, by a mix of space launch systems from standard launch pads at major support facilities. This is… more
Date: June 24, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Information Technology: Training Can Be Enhanced by Greater Use of Leading Practices

Description: A letter report issued by the General Accounting Office with an abstract that begins "Effective training of information technology (IT) staff, as called for in the E-Government (E-Gov) Act of 2002, is essential to developing and retaining a qualified workforce. In an earlier report (GAO-03-390), we identified 22 leading practices, grouped into 5 key training management processes, used by private-sector companies to implement effective IT training. These practices suggest approaches that governm… more
Date: June 24, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Homeland Security: Coordinated Planning and Standards Needed to Better Manage First Responder Grants in the National Capital Region

Description: Testimony issued by the General Accounting Office with an abstract that begins "Since the tragic events of September 11, 2001, the National Capital Region (NCR), comprising jurisdictions including the District of Columbia and surrounding jurisdictions in Maryland and Virginia, has been recognized as a significant potential target for terrorism. GAO was asked to report on (1) what federal funds have been allocated to NCR jurisdictions for emergency preparedness; (2) what challenges exist within … more
Date: June 24, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Wildland Fires: Forest Service and BLM Need Better Information and a Systematic Approach for Assessing the Risks of Environmental Effects

Description: A letter report issued by the General Accounting Office with an abstract that begins "Decades of fire suppression, as well as changing land management practices, have caused vegetation to accumulate and become altered on federal lands. Concerns about the effects of wildland fires have increased efforts to reduce fuels on federal lands. These efforts also have environmental effects. Congressional requesters asked GAO to (1) describe effects from fires on the environment, (2) assess the informati… more
Date: June 24, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

National Park Service: Comments on Provisions of S. 2543, a Bill to Establish a Federal Program and Criteria for National Heritage Areas

Description: Testimony issued by the General Accounting Office with an abstract that begins "The Congress has established, or "designated," 24 national heritage areas to recognize the value of their local traditions, history, and resources to the nation's heritage. These areas, including public and private lands, receive funds and assistance through cooperative agreements with the National Park Service, which has no formal program for them. They also receive funds from other agencies and nonfederal sources,… more
Date: June 24, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Statement of Jerri-Anne Garl United States Environmental Protection Agency, Region 5 Director, Office of Strategic Environmental Analysis Before the Subcommittee on Water Resources and Environment Transportation and Infrastructure Committee of the U.S.House of Representatives

Description: This statement was given by Jerri-Anne Garl the director of the Office of Strategic Environmental Analysis before the Subcommittee on Water Resources and Environment Transportation Infrastructure Committee of the United States House of Representatives.
Date: June 24, 2004
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

A New Method for In-situ Characterization of Important Actinides and Technetium Compounds via Fiberoptic Surface Enhanced Raman Spectroscopy (SERS)

Description: This project serves to fill information gap through the development of a novel surface-enhanced Raman scattering (SERS) spectroscopy to selectively and sensitively monitor and characterize the chemical speciation of radionuclides at trace levels. The SERS technique permits both of these measurements to be made simultaneously, and results in significant improvement over current methods in reducing time of analysis, cost, and sample manipulation. Our overall goal is (a) to develop a scientific ba… more
Date: June 24, 2004
Creator: Dai, Sheng & Gu, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of Pore Scale Processes That Affect Soil Vapor Extraction

Description: Dense nonaqueous phase liquid (DNAPL) contamination in the vadose zone is a significant problem at Department of Energy sites. Soil vapor extraction (SVE) is commonly used to remediate DNAPLs from the vadose zone. In most cases, a period of high recovery has been followed by a sustained period of low recovery. This behavior has been attributed to multiple processes including slow interphase mass transfer, retarded vapor phase transport, and diffusion from unswept zones of low permeability. Prio… more
Date: June 24, 2004
Creator: Valocchi, Albert J.; Werth, Charles J. & Webb, Andrew G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Axial Pressure Drop Measurements during Pilot-Scale Testing of a Mott Crossflow Filter

Description: The Department of Energy selected CSSX as the preferred cesium removal technology for Savannah River Site waste. As a pretreatment step for the CSSX flowsheet, personnel contact the incoming salt solution that contains entrained sludge with MST to adsorb strontium and select actinides. They filter the resulting slurry to remove the sludge and MST. The filtrate receives further treatment to remove cesium in the solvent extraction system. The baseline filtration technology uses a Mott crossflow f… more
Date: June 24, 2004
Creator: POIRIER, MICHAEL
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Topology of charge density and elastic properties of Ti3SiC2 polymorphs

Description: Using an all-electron, full potential first-principles method, we have investigated the topology of charge density and elastic properties of the two polymorphs, alpha and beta, of Ti3SiC2. The bonding effect was analyzed based on Bader's quantum theory of ''atoms in molecules'' (AIM). It was found that the Ti-Si bonding effect is significantly weaker in beta than in alpha, giving less stabilizing effect for beta. The Si-C bonds, which are absent in alpha, are formed in beta and provide addition… more
Date: June 24, 2004
Creator: Yu, Rong; Zhang, Xiao Feng; He, Lian Long & Ye, Heng Qiang
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electron Transport and Ion Acceleration in a Low-power Cylindrical Hall Thruster

Description: Conventional annular Hall thrusters become inefficient when scaled to low power. Cylindrical Hall thrusters, which have lower surface-to-volume ratio, are therefore more promising for scaling down. They presently exhibit performance comparable with conventional annular Hall thrusters. Electron cross-field transport in a 2.6 cm miniaturized cylindrical Hall thruster (100 W power level) has been studied through the analysis of experimental data and Monte Carlo simulations of electron dynamics in … more
Date: June 24, 2004
Creator: Smirnov, A.; Raitses, Y. & Fisch, N.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electron Cross-field Transport in a Low Power Cylindrical Hall Thruster

Description: Conventional annular Hall thrusters become inefficient when scaled to low power. Cylindrical Hall thrusters, which have lower surface-to-volume ratio, are therefore more promising for scaling down. They presently exhibit performance comparable with conventional annular Hall thrusters. Electron cross-field transport in a 2.6 cm miniaturized cylindrical Hall thruster (100 W power level) has been studied through the analysis of experimental data and Monte Carlo simulations of electron dynamics in … more
Date: June 24, 2004
Creator: Smirnov, A.; Raitses, Y. & Fisch, N. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transferability of Data Related to the Underground Test Area Project, Nevada Test Site, Nye County, Nevada: Revision 0

Description: This document is the collaborative effort of the members of an ad hoc subcommittee of the Underground Test Area (UGTA) Technical Working Group (TWG). The UGTA Project relies on data from a variety of sources; therefore, a process is needed to identify relevant factors for determining whether material-property data collected from other areas can be used to support groundwater flow, radionuclide transport, and other models within a Corrective Action Unit (CAU), and for documenting the data transf… more
Date: June 24, 2004
Creator: Stoller-Navarro Joint Venture
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ELECTRICAL SUPPORT SYSTEM DESCRIPTION DOCUMENT

Description: The purpose of this revision of the System Design Description (SDD) is to establish requirements that drive the design of the electrical support system and their bases to allow the design effort to proceed to License Application. This SDD is a living document that will be revised at strategic points as the design matures over time. This SDD identifies the requirements and describes the system design as they exist at this time, with emphasis on those attributes of the design provided to meet the… more
Date: June 24, 2004
Creator: Roy, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Out-of-core Interactive Display of Large Meshes Using an Oriented Bounding Box-based Hardware Depth Query

Description: In this paper we present an occlusion culling method that uses hardware-based depth queries on oriented bounding boxes to cull unseen geometric primitives efficiently. An out-of-core design enables this method to interactively display data sets that are too large to fit into main memory. During a preprocessing phase, a spatial subdivision (such as an octree or BSP tree) of a given data set is constructed where, for each node, an oriented bounding box containing mesh primitives is computed using… more
Date: June 24, 2004
Creator: Ha, H; Gregorski, B & Joy, K I
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Data Structures and Algorithms for Graph Based Remote Sensed Image Content Storage and Retrieval

Description: The Image Content Engine (ICE) project at Lawrence Livermore National Laboratory (LLNL) extracts, stores and allows queries of image content on multiple levels. ICE is designed for multiple application domains. The domain explored in this work is aerial and satellite surveillance imagery. The highest level of semantic information used in ICE is graph based. After objects are detected and classified, they are grouped based in their interrelations. The graph representing a locally related set of … more
Date: June 24, 2004
Creator: Grant, C W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Incipient Spallation Fracture in Light Metals From 3D X-Ray Tomography, 2D Microscopy, and Molecular Dynamics Simulations

Description: The dynamic fracture of ductile metals is known to occur through the nucleation and growth of microscopic voids. As the voids grow, the surrounding metal is plastically deformed to accommodate the change in void volume. In order to gain better insight into void growth, gas gun recovery experiments were used to study incipient spallation fracture in light metals (Al, Cu, V). In addition to in-situ free surface velocity wave-profiles, the recovered samples were first analyzed using 3D X-ray tomog… more
Date: June 24, 2004
Creator: Belak, J; Cazamias, J U; Chau, R; Haupt, D; Kinney, J H; Kumar, M et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of an Alternative Statistical Method for Analysis of RCRA Groundwater Monitoring Data at the Hanford Site

Description: Statistical methods are required in groundwater monitoring programs to determine if a RCRA-regulated unit affects groundwater quality beneath a site. This report presents the results of the statistical analysis of groundwater monitoring data acquired at B Pond and the 300 Area process trenches during a 2-year trial test period.
Date: June 24, 2004
Creator: Chou, Charissa J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Turbulent Kinetic Energy in the Oklahoma City Urban Environment

Description: A major field experiment, Joint URBAN 2003 (JU2003), was conducted in Oklahoma City in July 2003 to collect meteorological and tracer data sets for evaluating dispersion models in urban areas. The Department of Homeland Security and the Defense Threat Reduction Agency were the primary sponsors of JU2003. Investigators from five Department of Energy national laboratories, several other government agencies, universities, private companies, and international agencies conducted the experiment. Obse… more
Date: June 24, 2004
Creator: Lundquist, J; Leach, M & Gouveia, F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Colloid-Facilitated Transport of Radionuclides through the Vadose Zone

Description: This project seeks to improve the basic understanding of the role of colloids in facilitating the transport of contaminants in the vadose zone. We focus on three major thrusts: (1) thermodynamic stability and mobility of colloids formed by reactions of sediments with highly alkaline tank waste solutions, (2) colloid-contaminant interactions, and (3) in situ colloid mobilization and colloid-facilitated contaminant transport occurring in both contaminated and uncontaminated Hanford sediments.
Date: June 24, 2004
Creator: Flury, Markus; Harsh, James B.; Zachara, John M.; McCarthy, John F. & Lichtner, Peter C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Top physics at CDF

Description: Precision studies of top quark properties are a primary goal of the Run II physics program at the Fermilab Tevatron. Marking the first stages of this program, the CDF collaboration presents recent results on top pair production cross section, single top physics and top mass, using between 109 and 200 pb{sup -1} of Run II data.
Date: June 24, 2004
Creator: Thom, Julia
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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