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Defense Acquisitions: Analysis of Processes Used to Evaluate Active Protection Systems

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Active Protection Systems (APS) protect vehicles from attack by detecting and intercepting missiles or munitions. In 2005, the lead systems integrator for the Army's Future Combat Systems (FCS) program sought proposals for an APS developer and design and to deliver APS prototypes on vehicles by fiscal year 2009. Raytheon was chosen the APS developer. At the same time, the Department of Defense's Office … more
Date: June 8, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Biofuels: DOE Lacks a Strategic Approach to Coordinate Increasing Production with Infrastructure Development and Vehicle Needs

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. transportation sector is almost entirely dependent on oil, a condition that poses significant economic and environmental risks. Biofuels, such as ethanol and biodiesel, have the potential to displace oil use in transportation fuel. GAO was asked to describe the status of and impediments to expanding biofuel production, distribution infrastructure, and compatible vehicles as well as federal poli… more
Date: June 8, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Aviation Administration: Cost Allocation Practices and Cost Recovery Proposal Compared with Selected International Practices

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Anticipating the expiration of the Federal Aviation Administration's (FAA) current authorization at the end of fiscal year 2007, the administration submitted a proposal on February 14, 2007, for reauthorizing FAA and the excise taxes that fund most of its budget. This proposal would introduce cost-based charges for commercial users of air traffic control services, eliminate many current taxes, substantia… more
Date: June 8, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Weather Forecasting: National Weather Service's Operations Prototype Needs More Rigorous Planning

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Using advanced systems and trained specialists located in 122 weather forecast offices throughout the country, the National Weather Service (NWS) provides storm and flood warnings and weather forecasts to protect life and property and to enhance the national economy. To improve the efficiency of its operations, in November 2006, NWS approved an effort to develop a prototype of an alternative way of oper… more
Date: June 8, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design of a High Field Stress, Velvet Cathode for the Flash X-Ray (FXR) Induction Accelerator

Description: A new cathode design has been proposed for the Flash X-Ray (FXR) induction linear accelerator with the goal of lowering the beam emittance. The original design uses a conventional Pierce geometry and applies a peak field of 134 kV/cm (no beam) to the velvet emission surface. Voltage/current measurements indicate that the velvet begins emitting near this peak field value and images of the cathode show a very non-uniform distribution of plasma light. The new design has a flat cathode/shroud profi… more
Date: June 8, 2007
Creator: Houck, T.; Brown, C.; Fleming, D.; Kreitzer, B.; Lewis, K.; Ong, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Force10 P10 Evaluation

Description: The lack of an acceptable intrusion monitoring solution limits the deployment of 10GE (10 Gigabit-per-second Ethernet) technology across the LLNL's unclassified network infrastructure. The desire to operate at 10GE motivates us to evaluate the functionality and performance of a 10GE intrusion monitoring solution, the Force10 P10.
Date: June 8, 2007
Creator: Allen, J.; Goldstone, R.; Instenes, S. & Lawver, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Using IOR to analyze the I/O Performance for HPC Platforms

Description: The HPC community is preparing to deploy petaflop-scale computing platforms that may include hundreds of thousands to millions of computational cores over the next 3 years. Such explosive growth in concurrency creates daunting challenges for the design and implementation of the I/O system. In this work, we first analyzed the I/O practices and requirements of current HPC applications and used them as criteria to select a subset of microbenchmarks that reflect the workload requirements. Our analy… more
Date: June 8, 2007
Creator: Shan, Hongzhang & Shalf, John
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Senate Legislative Procedures: Published Sources of Information

Description: The Senate publishes its rules, precedents, and other related information so that Senators and their staff have convenient access to the Senate’s legislative procedures and can gauge how those procedures are likely to apply in various situations. Information about the Senate’s legislative procedures is published in four official documents. This report discusses these documents.
Date: June 8, 2007
Creator: Davis, Christopher M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Numerical Study of Gamma-Ray Burst Jet Formation in Collapsars

Description: Two-dimensional MHD simulations are performed using the ZEUS-2D code to investigate the dynamics of a collapsar that generates a GRB jet, taking account of realistic equation of state, neutrino cooling and heating processes, magnetic fields, and gravitational force from the central black hole and self-gravity. It is found that neutrino heating processes are not efficient enough to launch a jet in this study. It is also found that a jet is launched mainly by B{sub {phi}} fields that are amplifie… more
Date: June 8, 2007
Creator: Nagataki, S.; /Kyoto U., Yukawa Inst., Kyoto /KIPAC, Menlo Park; Takahashi, R.; U., /Tokyo; Mizuta, A.; Takiwaki, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling and Analysis of Global and Regional Hydrologic Processes and Appropriate Conservation of Moist Entropy

Description: The research supported by DOE funding addressed the fundamental issues of understanding and modeling of hydrologic processes in relation to regional and global climate change. The emphasis of this research effort was on the application of isentropic modeling and analysis to advance the accuracy of the simulation of all aspects of the hydrologic cycle including clouds and thus the climate state regionally and globally. Simulation of atmospheric hydrologic processes by the UW hybrid isentropic co… more
Date: June 8, 2007
Creator: Donald Johnson, Todd Schaack
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Individual Radiological Protection Monitoring of Utrok Atoll Residents Based on Whole Body Counting of Cesium-137 (137Cs) and Plutonium Bioassay

Description: This report contains individual radiological protection surveillance data developed during 2006 for adult members of a select group of families living on Utrok Atoll. These Group I volunteers all underwent a whole-body count to determine levels of internally deposited cesium-137 ({sup 137}Cs) and supplied a bioassay sample for analysis of plutonium isotopes. Measurement data were obtained and the results compared with an equivalent set of measurement data for {sup 137}Cs and plutonium isotopes … more
Date: June 8, 2007
Creator: Hamilton, T.F.; Kehl, S.R.; Brown, T.A.; Martinelli, R.E.; Hickman, D.P.; Jue, T.M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Outflow Propagation in Collapsars: Collimated Jets And Expanding Outflows

Description: We investigate the outflow propagation in the collapsar in the context of gamma-ray bursts (GRBs) with 2D relativistic hydrodynamic simulations. We vary the specific internal energy and bulk Lorentz factor of the injected outflow from non-relativistic regime to relativistic one, fixing the power of the outflow to be 10{sup 51}erg s{sup -1}. We observed the collimated outflow, when the Lorentz factor of the injected outflow is roughly greater than 2. To the contrary, when the velocity of the inj… more
Date: June 8, 2007
Creator: Mizuta, A.; /Garching, Max Planck Inst.; Yamasaki, T.; /Kyoto U., Yukawa Inst., Kyoto; Nagataki, S.; Mineshige, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Spectroscopy, structure, and energy transfer of transient radicals in combustion

Description: Spectroscopy, structure, and energy transfer of transient radicals in combustion Period: 4/15/04-12/31/06 PI: Hai-Lung Dai, Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104 dai@sas.upenn.edu A newly developed approach based on nanosecond time resolved Fourier Transform IR Emission Spectroscopy (TR-FTIRES) has been applied to the investigation of the spectroscopy and structure of unknown transient radicals that are important in combustion processes. Several radicals in… more
Date: June 8, 2007
Creator: Dai, Hai-Lung
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A High Temperature (400 to 650oC) Secondary Storage Battery Based on Liquid Sodium and Potassium Anodes

Description: This STTR Phase I research program was on the development of high temperature (400 to 650 C), secondary batteries with roundtrip efficiency > 90% for integration with a 3 to 10 kW solid oxide fuel cell (SOFC) system. In fulfillment of this objective, advanced planar high temperature rechargeable batteries, comprised of an alkali metal ion conducting, highly refractory, beta'' alumina solid electrolyte (BASE) sandwiched between liquid sodium (or potassium) anode and liquid metal salt cathode,… more
Date: June 8, 2007
Creator: Tao, Greg & Weber, Neill
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance of a High Resolution Cavity Beam Position Monitor System

Description: It has been estimated that an RF cavity Beam Position Monitor (BPM) could provide a position measurement resolution of less than one nanometer. We have developed a high resolution cavity BPM and associated electronics. A triplet comprised of these BPMs was installed in the extraction line of the Accelerator Test Facility (ATF) at the High Energy Accelerator Research Organization (KEK) for testing with its ultra-low emittance beam. The three BPMs were each rigidly mounted inside an alignment fra… more
Date: June 8, 2007
Creator: Walston, Sean; Boogert, Stewart; Chung, Carl; Fitsos, Joe; Frisch, Joe; Gronberg, Jeff et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Characterization of Direct Push Vadose Zone Sediments from the T and TY Waste Management Areas

Description: This report contains all the geochemical and selected physical characterization data collected on vadose zone sediment recovered from 5 direct push characterization holes emplaced to investigate vadose zone contamination associated with leaks from tanks 241-TY-105 (UPR-200-W-152) and 241-TY-106 (UPR-200-W-153). Tank 241-TY-105 is estimated to have leaked 35,000 gal of tributyl phosphate (TBP) waste from the uranium recovery process to the vadose zone in 1960. Tank 241-TY-106 is estimated to hav… more
Date: June 8, 2007
Creator: Brown, Christopher F.; Valenta, Michelle M.; Serne, R. Jeffrey; Bjornstad, Bruce N.; Lanigan, David C.; Iovin, Cristian et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PLUTONIUM FINISHING PLANT (PFP) SUB-GRADE EE/CA EVALUATION OF ALTERNATIVES A NEW MODEL

Description: An engineering evaluation/cost analysis (EE/CA) was performed at the Hanford Site's Plutonium Finishing Plant (PFP). The purpose of the EVCA was to identify the sub-grade items to be evaluated; determine the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) hazardous substances through process history and available data; evaluate these hazards; and as necessary, identify the available alternatives to reduce the risk associated with the contaminants. The sub-… more
Date: June 8, 2007
Creator: HOPKINS, A.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Summary of SLAC's SEY Measurement On Flat Accelerator Wall Materials

Description: The electron cloud effect (ECE) causes beam instabilities in accelerator structures with intense positively charged bunched beams. Reduction of the secondary electron yield (SEY) of the beam pipe inner wall is effective in controlling cloud formation. We summarize SEY results obtained from flat TiN, TiZrV and Al surfaces carried out in a laboratory environment. SEY was measured after thermal conditioning, as well as after low energy, less than 300 eV, particle exposure.
Date: June 8, 2007
Creator: Le Pimpec, F. & /PSI, Villigen /SLAC
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface Dipole Formation and Lowering of the Work Function by Cs Adsorption on InP(100) Surface

Description: The Cs adsorption on InP(100) surface is studied with Synchrotron Radiation Photoelectron Spectroscopy. The charge transfer from Cs to the InP substrate is observed from the Cs induced In4d and P2p components, and this charge transfer results in surface dipole formation and lowering of the work function. The Cs4d intensity saturates at coverage of one monolayer (ML). However, a break point is observed at 0.5 ML, which coincides with the achievement of the minimum work function. This break point… more
Date: June 8, 2007
Creator: Sun, Y.; Liu, Z. & Pianetta, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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