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Stability Issues in Ambient-Temperature Passive Magnetic Bearing Systems

Description: The ambient-temperature passive magnetic bearing system developed at the Lawrence Livermore National Laboratory achieves rotor-dynamic stability by employing special combinations of levitating and stabilizing elements. These elements, energized by permanent magnet material, create the magnetic and electrodynamic forces that are required for the stable levitation of rotating systems, such as energy-storage flywheels. Stability criteria, derived from theory, describe the bearing element parameter… more
Date: February 17, 2000
Creator: Post, Richard F.
Partner: UNT Libraries Government Documents Department
open access

User Manual for the AZ-101 Data Acquisition System (AS-101 DAS)

Description: User manual for the TK AZ-101 Waste Retrieval System Data Acquisition System. The purpose of this document is to describe use of the AZ-101 Data Acquisition System (AZ-101 DAS). The AZ-101 DAS is provided to fulfill the requirements for data collection and monitoring as defined in Letters of Instruction (LOI) from Numatec Hanford Corporation (NHC) to Fluor Federal Services (FFS). For a complete description of the system, including design, please refer to the AZ-101 DAS System Description docume… more
Date: February 17, 2000
Creator: BRAYTON, D.D.
Partner: UNT Libraries Government Documents Department
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Plan for the Startup of HA-21I Furnace Operations at the Plutonium Finishing Plant (PFP)

Description: Achievement of Thermal Stabilization mission elements require the installation and startup of three additional muffle furnaces for the thermal stabilization of plutonium and plutonium bearing materials at the Plutonium Finishing Plant (PFP). The release to operate these additional furnaces will require an Activity Based Startup Review. The conduct of the Activity Based Startup Review (ABSR) was approved by Fluor Daniel Hanford on October 15, 1999. This plan has been developed with the objective… more
Date: February 17, 2000
Creator: Willis, H. T.
Partner: UNT Libraries Government Documents Department
open access

Detection of anthropogenic climate change: a modeling study

Description: This project involved two related areas of research: (1) simulating natural climate variability using a global climate model, and (2) using the computer resources of the Accelerated Strategic Computing Initiative (ASCI) Blue computer for specific problems in atmospheric science and climate. Although originally scheduled to last two years, this ER project ended after one year; the work is begin continued under a larger (Strategic Initiative) project which started in FY99.
Date: February 17, 1998
Creator: Duffy, P B & Eltgroth, P G
Partner: UNT Libraries Government Documents Department
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Portable implementation of implicit methods for the UEDGE and BOUT codes on parallel computers

Description: A description is given of the parallelization algorithms and results for two codes used ex- tensively to model edge-plasmas in magnetic fusion energy devices. The codes are UEDGE, which calculates two-dimensional plasma and neutral gas profiles, and BOUT, which cal- culates three-dimensional plasma turbulence using experimental or UEDGE profiles. Both codes describe the plasma behavior using fluid equations. A domain decomposition model is used for parallelization by dividing the global spatial… more
Date: February 17, 1999
Creator: Rognlien, T D & Xu, X Q
Partner: UNT Libraries Government Documents Department
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Analysis of Turbulent Heat Transfer, Mass Transfer, and Friction in Smooth Tubes at High Prandtl and Schmidt Numbers

Description: From Introduction: "In the analysis given herein, which was made at the NACA Lewis laboratory, the expression for eddy diffusivity given in reference 1 is modified in order to account for the effect of kinematic viscosity in reducing the turbulence in the region close to the wall. The effects of variable viscosity and of length-to-diameter ratio are also investigated."
Date: February 17, 1954
Creator: Deissler, Robert G.
Partner: UNT Libraries Government Documents Department
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Peacekeeping/Stabilization and Conflict Transitions: Background and Congressional Action on the Civilian Response/Reserve Corps and other Civilian Stabilization and Reconstruction Capabilities

Description: This report focuses on the establishment of the Office of the Coordinator for Reconstruction and Stabilization (S/CRS) in the Office of the Secretary of State, and on the Civilian Reserve Corps (CRC). This report provides background on this initiative, its progression from the Bush Administration through the Obama Administration, and items under consideration in the 112th Congress relating to continued funding of S/CRS and the CRC. It also discusses proposals and tracks related legislative acti… more
Date: February 17, 2010
Creator: Serafino, Nina M.
Partner: UNT Libraries Government Documents Department
open access

Argentina's Defaulted Sovereign Debt: Dealing with the "Holdouts"

Description: This report reviews Argentina's financial crisis, the bond exchanges of 2005 and 2010, ongoing litigation, prospects for a final solution, related U.S. legislation, and broader policy issues. These include lessons on the effectiveness and cost of Argentina's default strategy, the ability to force sovereigns to meet their debt obligations, and ways to avoid future defaults like Argentina's.
Date: February 17, 2010
Creator: Hornbeck, J. F.
Partner: UNT Libraries Government Documents Department
open access

Transonic Aerodynamic and Trim Characteristics of a Multi-Engine Delta-Wing Airplane Model

Description: Memorandum presenting an investigation of three models of a delta-wing airplane designed for a long-range subsonic cruise and a supersonic dash. Results regarding the aerodynamic characteristics of the models and effect of elevon deflection on aerodynamic characteristics of the four-engine model are provided.
Date: February 17, 1956
Creator: Swihart, John M. & Foss, Willard E., Jr.
Partner: UNT Libraries Government Documents Department
open access

Some Interference Effects That Influence Vertical-Tail Loads at Supersonic Speeds

Description: Memorandum presenting three types of aerodynamic interference originating from forward components of airplanes, which are shown to contribute to decreased vertical-tail effectiveness. The vorticity originating from a slender fuselage ahead of the wing resulted in a marked reduction in vertical-tail effectiveness with angle of attack for one model.
Date: February 17, 1956
Creator: Edwards, S. Sherman
Partner: UNT Libraries Government Documents Department
open access

Bee Health: The Role of Pesticides

Description: This report briefly describes recent scientific research and analysis regarding the potential role of pesticides among the factors affecting the health and well-being of bees.
Date: February 17, 2015
Creator: Johnson, Renée & Corn, M. Lynne
Partner: UNT Libraries Government Documents Department
open access

Pipeline Safety and Security: Federal Programs

Description: This report discusses congressional interest in securing the nation's pipelines. Nearly half a million miles of oil and natural gas transmission pipeline crisscross the United States. While an efficient and fundamentally safe means of transport, many pipelines carry hazardous materials with the potential to cause public injury and environmental damage.
Date: February 17, 2009
Creator: Parfomak, Paul W.
Partner: UNT Libraries Government Documents Department
open access

Automobile Collision Data: An Assessment of Needs and Methods of Acquisition

Description: A report on evaluation of the automotive crash recorder program proposed by the National Highway Traffic Safety Administration (NHTSA). As the assessment progressed, the implications for automobile collision data as a “whole became apparent and the report has been so titled to provide a more accurate indication of its scope.
Date: February 17, 1975
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
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Predictive Model and Methodology for Heat Treatment Distortion

Description: The purpose of this project was to develop a modeling methodology and software tool to simulate and predict the results of heat treatment, especially distortion. In order to develop a simulation tool, significant technical, analytical, and experimental resources were needed. This task was too large and complex for just one company or organization to address. To this end, 4 national laboratories (Los Alamos National Laboratory, Lawrence Livermore National Laboratory, the Oak Ridge National Labor… more
Date: February 17, 1998
Creator: Ludtka, G.M.
Partner: UNT Libraries Government Documents Department
open access

Aerodynamic Loads on an External Store Adjacent to an Unswept Wing at Mach Numbers Between 0.75 and 1.96

Description: Report presenting an investigation to determine the aerodynamic characteristics of a sting-mounted Douglas Aircraft Company store in the presence of an unswept semispan cantilevered wing of aspect ratio 4.0. Results regarding wing loads and store loads are provided.
Date: February 17, 1956
Creator: Hadaway, William M.
Partner: UNT Libraries Government Documents Department
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Aerodynamic Loads on an External Store Adjacent to an Unswept Wing at Mach Numbers Between 0.75 and 1.96

Description: Memorandum presenting an investigation in the blowdown tunnel of the pressure tunnel to determine the aerodynamic characteristics of a sting-mounted Douglas Aircraft Company store in the presence of, but not attached to, an unswept semispan cantilevered wing of aspect ratio 4.0. The influence of the store on the aerodynamic characteristics of the wing was also obtained.
Date: February 17, 1956
Creator: Hadaway, William M.
Partner: UNT Libraries Government Documents Department
open access

Preliminary Wind-Tunnel Tests of Triangular and Rectangular Wings in Steady Roll at Mach Numbers of 1.62 and 1.92

Description: Report presenting the damping-in-roll coefficients for a series of thin triangular plan-form wings and two rectangular wings in the 9-inch supersonic wind tunnel. The damping in roll of the rectangular wings was very close to what was predicted by linear theory, but the triangular wings gave results approximately 10 percent below that predicted when the wing leading edges were well ahead of or behind the Mach cone.
Date: February 17, 1949
Creator: Brown, Clinton E. & Heinke, Harry S., Jr.
Partner: UNT Libraries Government Documents Department
open access

Forced-convection heat-transfer characteristics of molten sodium hydroxide

Description: The forced-convection heat-transfer characteristics of sodium hydroxide were experimentally investigated. The heat-transfer data for heating fall slightly above the McAdams correlation line, and the heat-transfer data for cooling are fairly well represented by the McAdams correlation line.
Date: February 17, 1953
Creator: Grele, Milton D. & Gedeon, Louis
Partner: UNT Libraries Government Documents Department
open access

Effects of Molecular Weight on Crazing and Tensile Properties of Polymethyl Methacrylate

Description: Memorandum reporting the tensile and crazing properties for five cast polymethy lmethacrylate sheets in which the molecular weight of the resin was 90,000, 120,000, 200,000, 490,000, and 3,160,000. Both stress crazing and stress-solvent crazing tests were conducted. Results regarding the standard tensile tests, stress-solvent crazing tests, and discussion of failure and crazing are provided.
Date: February 17, 1954
Creator: Wolock, I.; Sherman, M. A. & Axilrod, B. M.
Partner: UNT Libraries Government Documents Department
open access

Determination of Longitudinal Stability in Supersonic Accelerated Maneuvers for the Douglas D-558-II Research Airplane

Description: Report discussing testing of a Douglas D-558-II to investigate its longitudinal stability characteristics in accelerated flight at supersonic speeds. Information about the normal-force coefficients and their relation to stability and pitch-up of the aircraft is included.
Date: February 17, 1954
Creator: Ankenbruck, Herman O.
Partner: UNT Libraries Government Documents Department
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Lift and Drag Characteristics of the Bell X-5 Research Airplane at 59 Degrees Sweepback for Mach Numbers from 0.60 to 1.03

Description: Report presenting an investigation of the flight characteristics of the Bell X-5 research airplane with sweepback that can be varied from 20 degrees to 59 degrees in flight. Lift and drag data have been obtained for the 59 degree sweep configuration for a range of Mach numbers and from zero to almost maximum lift.
Date: February 17, 1953
Creator: Bellman, Donald R.
Partner: UNT Libraries Government Documents Department
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Summary of some rocket-model investigations of effects of wing aspect ratio and thickness on aileron rolling effectiveness including some effects of spanwise aileron location for sweptback wings with aspect ratio of 8

Description: Report presenting the rolling effectiveness of 0.2-chord, trailing-edge ailerons on high-aspect-ratio sweptback wings over a range of Mach numbers. Some effects of spanwise aileron location on rolling effectiveness were measured by testing ailerons on the inboard half, the outboard half, and the full length of the exposed wings.
Date: February 17, 1954
Creator: Strass, H. Kurt
Partner: UNT Libraries Government Documents Department
open access

Vapor Phase Detection Using Chemi-Resistor Sensor Arrays

Description: This paper focuses on two main areas: understanding sensor response times so as to obtain improved time response in the field when needed for vapor tracking and classification, and improved theoretical understanding of the sensor response properties that generate the pattern on the array in response to a given analyte.
Date: February 17, 1999
Creator: Lewis, Nathan S.
Partner: UNT Libraries Government Documents Department
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