Sample records for narrow body aircraft

  1. Hybrid wing-body aircraft noise and performance assessment

    E-Print Network [OSTI]

    Weed, Philip Andrew

    2010-01-01T23:59:59.000Z

    Hybrid wing-body aircraft noise generation and boundary layer ingestion (BLI) performance trends with increased fan face Mach number inlet designs are investigated. The presented topics are in support of the NASA subsonic ...

  2. Impact of Liquefied Natural Gas usage and payload size on Hybrid Wing Body aircraft fuel efficiency

    E-Print Network [OSTI]

    Mody, Pritesh (Pritesh Chetan)

    2010-01-01T23:59:59.000Z

    This work assessed Hybrid Wing Body (HWB) aircraft in the context of Liquefied Natural Gas (LNG) fuel usage and payload/range scalability at three scales: H1 (B737), H2 (B787) and H3 (B777). The aircraft were optimized for ...

  3. Aircraft

    DOE Patents [OSTI]

    Hibbs, Bart D. (1732 N. Grand Oaks, Altadena, CA 91001); Lissaman, Peter B. S. (3276 Rubio Canyon Rd., Altadena, CA 91001); Morgan, Walter R. (3217 Amarillo Ave., Simi Valley, CA 93063); Radkey, Robert L. (70 Eddystone Ct., Redwood City, CA 94065)

    1998-01-01T23:59:59.000Z

    This disclosure provides a solar rechargeable aircraft that is inexpensive to produce, is steerable, and can remain airborne almost indefinitely. The preferred aircraft is a span-loaded flying wing, having no fuselage or rudder. Travelling at relatively slow speeds, and having a two-hundred foot wingspan that mounts photovoltaic cells on most all of the wing's top surface, the aircraft uses only differential thrust of its eight propellers to turn. Each of five sections of the wing has one or more engines and photovoltaic arrays, and produces its own lift independent of the other sections, to avoid loading them. Five two-sided photovoltaic arrays, in all, are mounted on the wing, and receive photovoltaic energy both incident on top of the wing, and which is incident also from below, through a bottom, transparent surface. The aircraft is capable of a top speed of about ninety miles per hour, which enables the aircraft to attain and can continuously maintain altitudes of up to sixty-five thousand feet. Regenerative fuel cells in the wing store excess electricity for use at night, such that the aircraft can sustain its elevation indefinitely. A main spar of the wing doubles as a pressure vessel that houses hydrogen and oxygen gasses for use in the regenerative fuel cell. The aircraft has a wide variety of applications, which include weather monitoring and atmospheric testing, communications, surveillance, and other applications as well.

  4. Aircraft

    DOE Patents [OSTI]

    Hibbs, B.D.; Lissaman, P.B.S.; Morgan, W.R.; Radkey, R.L.

    1998-09-22T23:59:59.000Z

    This disclosure provides a solar rechargeable aircraft that is inexpensive to produce, is steerable, and can remain airborne almost indefinitely. The preferred aircraft is a span-loaded flying wing, having no fuselage or rudder. Travelling at relatively slow speeds, and having a two-hundred foot wingspan that mounts photovoltaic cells on most all of the wing`s top surface, the aircraft uses only differential thrust of its eight propellers to turn. Each of five sections of the wing has one or more engines and photovoltaic arrays, and produces its own lift independent of the other sections, to avoid loading them. Five two-sided photovoltaic arrays, in all, are mounted on the wing, and receive photovoltaic energy both incident on top of the wing, and which is incident also from below, through a bottom, transparent surface. The aircraft is capable of a top speed of about ninety miles per hour, which enables the aircraft to attain and can continuously maintain altitudes of up to sixty-five thousand feet. Regenerative fuel cells in the wing store excess electricity for use at night, such that the aircraft can sustain its elevation indefinitely. A main spar of the wing doubles as a pressure vessel that houses hydrogen and oxygen gases for use in the regenerative fuel cell. The aircraft has a wide variety of applications, which include weather monitoring and atmospheric testing, communications, surveillance, and other applications as well. 31 figs.

  5. Analog and digital dynamic simulations of a rigid body aircraft in straight and level flight

    E-Print Network [OSTI]

    Stroman, Morris Michael

    1973-01-01T23:59:59.000Z

    . , Texas A&M University Directed by: Dr. Balusu M. Rao A study of the dynamic response characteristics of an aircraft at low approach speeds was conducted using both a digital and an analog computer to simulate a DeHavilland "Beaver" DHC-2 in flight... to produce more sideslip and yawing motions than the rudder with analytical solutions. The problem areas of the STOL aircraft at low approach speeds as a result of a study of the DeHavilland "Beaver" were in lateral stability. The aircraft's response...

  6. Design and acoustic shielding prediction of hybrid wing-body aircraft

    E-Print Network [OSTI]

    Ng, Leo Wai-Tsun

    2009-01-01T23:59:59.000Z

    Recent research and developmental efforts in aircraft design have focused on the growing concerns about the environment impact of aviation and the rising costs of fuel. Under NASA's N+2 subsonics fixed-wing project, ...

  7. Tracking body and hands for gesture recognition: NATOPS aircraft handling signals database

    E-Print Network [OSTI]

    Song, Yale

    We present a unified framework for body and hand tracking, the output of which can be used for understanding simultaneously performed body-and-hand gestures. The framework uses a stereo camera to collect 3D images, and ...

  8. Solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L. (Livermore, CA)

    2007-09-18T23:59:59.000Z

    A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal contact with it so that heat is supplied from the thermal battery. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  9. Fuel Cell Council Working Group on Aircraft and Aircraft Ground...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Council Working Group on Aircraft and Aircraft Ground Support Fuel Cell Applications Fuel Cell Council Working Group on Aircraft and Aircraft Ground Support Fuel Cell Applications...

  10. Geometric Model of a Narrow Tilting CAR using Robotics formalism

    E-Print Network [OSTI]

    Boyer, Edmond

    of an Electrical narrow tilting car instead of a large gasoline car should dramatically decrease traffic congestion are the terminal links. Each body Cj is connected to its antecedent Ci (i=a (j)) with a joint that represents

  11. Conceptual aircraft dynamics from inverse aircraft modeling

    E-Print Network [OSTI]

    Ziegler, Gregory E

    1999-01-01T23:59:59.000Z

    This thesis presents a method of construe' ting a nonlinear dynamics model of a theoretical aircraft from the nonlinear batch simulation of an existing aircrew This method provides control law designers with a method of fabricating nonlinear models...

  12. Interactive dynamic aircraft scheduling

    E-Print Network [OSTI]

    Deckwitz, Thomas Anthony

    1984-01-01T23:59:59.000Z

    Introducing recent advances in computer technology to improve aircraft scheduling is investigated. Incorporating interactive graphics, modern database manipulation techniques, and decision support algorithms, the computer ...

  13. Aircraft as a meteorological sensor

    E-Print Network [OSTI]

    Haak, Hein

    Meteorological Institute 2 | The aircraft as a meteorological sensor Photo cover: A KLM Airbus A330-200 landsAircraft as a meteorological sensor Using Mode-S Enhanced Surveillance data to derive upper air Meteorological Institute 3 | The aircraft as a meteorological sensor Aircraft as a meteorological sensor Using

  14. Rankline-Brayton engine powered solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L. (Livermore, CA)

    2012-03-13T23:59:59.000Z

    A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  15. Rankine-Brayton engine powered solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L. (Livermore, CA)

    2009-12-29T23:59:59.000Z

    A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  16. Identification of Aircraft Hazards

    SciTech Connect (OSTI)

    K. Ashley

    2006-12-08T23:59:59.000Z

    Aircraft hazards were determined to be potentially applicable to a repository at Yucca Mountain in ''Monitored Geological Repository External Events Hazards Screening Analysis'' (BSC 2005 [DIRS 174235], Section 6.4.1). That determination was conservatively based upon limited knowledge of flight data in the area of concern and upon crash data for aircraft of the type flying near Yucca Mountain. The purpose of this report is to identify specific aircraft hazards that may be applicable to a monitored geologic repository (MGR) at Yucca Mountain, using NUREG-0800, ''Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants'' (NRC 1987 [DIRS 103124], Section 3.5.1.6), as guidance for the inclusion or exclusion of identified aircraft hazards. The intended use of this report is to provide inputs for further screening and analysis of identified aircraft hazards based upon the criteria that apply to Category 1 and Category 2 event sequence analyses as defined in 10 CFR 63.2 [DIRS 176544] (Section 4). The scope of this report includes the evaluation of military, private, and commercial use of airspace in the 100-mile regional setting of the repository at Yucca Mountain with the potential for reducing the regional setting to a more manageable size after consideration of applicable screening criteria (Section 7).

  17. A study of black aurora from aircraft-based optical observations and plasma measurements on FAST

    E-Print Network [OSTI]

    California at Berkeley, University of

    A study of black aurora from aircraft-based optical observations and plasma measurements on FAST L 2002. [1] Black aurora was observed on 30 January 1998 in a narrow-field camera forty seconds before. Electron energy flux measured by FAST provided strong evidence that FAST passed over black aurora

  18. Narrow gap electronegative capacitive discharges

    SciTech Connect (OSTI)

    Kawamura, E.; Lieberman, M. A.; Lichtenberg, A. J. [Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720 (United States)] [Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720 (United States)

    2013-10-15T23:59:59.000Z

    Narrow gap electronegative (EN) capacitive discharges are widely used in industry and have unique features not found in conventional discharges. In this paper, plasma parameters are determined over a range of decreasing gap length L from values for which an electropositive (EP) edge exists (2-region case) to smaller L-values for which the EN region connects directly to the sheath (1-region case). Parametric studies are performed at applied voltage V{sub rf}=500 V for pressures of 10, 25, 50, and 100 mTorr, and additionally at 50 mTorr for 1000 and 2000 V. Numerical results are given for a parallel plate oxygen discharge using a planar 1D3v (1 spatial dimension, 3 velocity components) particle-in-cell (PIC) code. New interesting phenomena are found for the case in which an EP edge does not exist. This 1-region case has not previously been investigated in detail, either numerically or analytically. In particular, attachment in the sheaths is important, and the central electron density n{sub e0} is depressed below the density n{sub esh} at the sheath edge. The sheath oscillations also extend into the EN core, creating an edge region lying within the sheath and not characterized by the standard diffusion in an EN plasma. An analytical model is developed using minimal inputs from the PIC results, and compared to the PIC results for a base case at V{sub rf}=500 V and 50 mTorr, showing good agreement. Selected comparisons are made at the other voltages and pressures. A self-consistent model is also developed and compared to the PIC results, giving reasonable agreement.

  19. A study of the dynamics of an aircraft subjected to the airloads created by a pair of trailing vortices of a large aircraft

    E-Print Network [OSTI]

    Ramirez, Amado

    1971-01-01T23:59:59.000Z

    a trailing vortex system of a larger aircraft. This analysis, based on a lifting surface theory developed by Jones and Rao, neglects wing-body-tail interaction effects. The changes in the aerodynamic loads and moments on the De Havilland Beaver..., to the trailing vortex system. The response of the Beaver aircraft in longitudinal flight is predicted as it penetrates a trailing vortex system of known strength. The trailing vortex strength is chosen in such a way that the linear- ization assumption...

  20. Narrow band gap amorphous silicon semiconductors

    DOE Patents [OSTI]

    Madan, A.; Mahan, A.H.

    1985-01-10T23:59:59.000Z

    Disclosed is a narrow band gap amorphous silicon semiconductor comprising an alloy of amorphous silicon and a band gap narrowing element selected from the group consisting of Sn, Ge, and Pb, with an electron donor dopant selected from the group consisting of P, As, Sb, Bi and N. The process for producing the narrow band gap amorphous silicon semiconductor comprises the steps of forming an alloy comprising amorphous silicon and at least one of the aforesaid band gap narrowing elements in amount sufficient to narrow the band gap of the silicon semiconductor alloy below that of amorphous silicon, and also utilizing sufficient amounts of the aforesaid electron donor dopant to maintain the amorphous silicon alloy as an n-type semiconductor.

  1. Aircraft Cabin Environmental Quality Sensors

    SciTech Connect (OSTI)

    Gundel, Lara; Kirchstetter, Thomas; Spears, Michael; Sullivan, Douglas

    2010-05-06T23:59:59.000Z

    The Indoor Environment Department at Lawrence Berkeley National Laboratory (LBNL) teamed with seven universities to participate in a Federal Aviation Administration (FAA) Center of Excellence (COE) for research on environmental quality in aircraft. This report describes research performed at LBNL on selecting and evaluating sensors for monitoring environmental quality in aircraft cabins, as part of Project 7 of the FAA's COE for Airliner Cabin Environmental Research (ACER)1 effort. This part of Project 7 links to the ozone, pesticide, and incident projects for data collection and monitoring and is a component of a broader research effort on sensors by ACER. Results from UCB and LBNL's concurrent research on ozone (ACER Project 1) are found in Weschler et al., 2007; Bhangar et al. 2008; Coleman et al., 2008 and Strom-Tejsen et al., 2008. LBNL's research on pesticides (ACER Project 2) in airliner cabins is described in Maddalena and McKone (2008). This report focused on the sensors needed for normal contaminants and conditions in aircraft. The results are intended to complement and coordinate with results from other ACER members who concentrated primarily on (a) sensors for chemical and biological pollutants that might be released intentionally in aircraft; (b) integration of sensor systems; and (c) optimal location of sensors within aircraft. The parameters and sensors were selected primarily to satisfy routine monitoring needs for contaminants and conditions that commonly occur in aircraft. However, such sensor systems can also be incorporated into research programs on environmental quality in aircraft cabins.

  2. Contribution to the study of narrow low mass hadronic structures

    E-Print Network [OSTI]

    B. Tatischeff; E. Tomasi-Gustafsson

    2008-02-01T23:59:59.000Z

    New data are presented, concerning narrow exotic structures in mesons, baryons and dibaryons. The sequence of narrow baryons is quite well described starting from the sequence of narrow mesons. In the same way, the sequence of narrow dibaryons is rather well described starting from the sequence of narrow baryons. Lastly it is shown that the masses of these narrow hadronic structures lie on straight line Regge-like trajectories.

  3. aircraft communication systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and the high-speed of aircrafts Jain, Raj 5 Aircraft System Identification Using Artificial Neural Networks Engineering Websites Summary: Aircraft System Identification Using...

  4. aircraft system concept: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft conducting High Volume Valasek, John 4 Aircraft System Identification Using Artificial Neural Networks Engineering Websites Summary: Aircraft System Identification Using...

  5. aircraft accidents: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft scheduling MIT - DSpace Summary: Introducing recent advances in computer technology to improve aircraft scheduling is investigated. Incorporating interactive graphics,...

  6. Optimal scheduling of fighter aircraft maintenance

    E-Print Network [OSTI]

    Cho, Philip Y

    2011-01-01T23:59:59.000Z

    The effective scheduling of fighter aircraft maintenance in the Air Force is crucial to overall mission accomplishment. An effective maintenance scheduling policy maximizes the use of maintenance resources and aircraft ...

  7. Maintenance cost studies of present aircraft subsystems

    E-Print Network [OSTI]

    Pearlman, Chaim Herman Shalom

    1966-01-01T23:59:59.000Z

    This report describes two detailed studies of actual maintenance costs for present transport aircraft. The first part describes maintenance costs for jet transport aircraft broken down into subsystem costs according to an ...

  8. Propulsion system concepts for silent aircraft

    E-Print Network [OSTI]

    Manneville, Alexis, 1978-

    2004-01-01T23:59:59.000Z

    The noise emitted by commercial aircraft is a major inhibitor of the growth of commercial air transport and is a critical environmental issue in air transportation. A functionally-silent aircraft is envisioned to achieve ...

  9. Global Mortality Attributable to Aircraft Cruise Emissions

    E-Print Network [OSTI]

    Britter, Rex E.

    Aircraft emissions impact human health though degradation of air quality. The majority of previous analyses of air quality impacts from aviation have considered only landing and takeoff emissions. We show that aircraft ...

  10. On Narrowing, Refutation Proofs and Constraints

    E-Print Network [OSTI]

    Nieuwenhuis, Robert

    years (see e.g. [RKL85, BGM88, H¨ol89, NRS89, BKW92, BW94]). In the literature, most completeness proofs LSE­narrowing ([BKW92, BW94]), in which leftmost­innermost rewrite proofs, with a priority ordering

  11. Non-decaying hydrodynamic interactions along narrow channels

    E-Print Network [OSTI]

    Misiunas, Karolis; Lauga, Eric; Lister, John R; Keyser, Ulrich F

    2015-01-01T23:59:59.000Z

    Particle-particle interactions are of paramount importance in every multi-body system as they determine the collective behaviour and coupling strength. Many well-known interactions like electro-static, van der Waals or screened Coulomb, decay exponentially or with negative powers of the particle spacing r. Similarly, hydrodynamic interactions between particles undergoing Brownian motion decay as 1/r in bulk, and are assumed to decay quickly in small channels. Such interactions are ubiquitous in biological and technological systems. Here we confine two particles undergoing Brownian motion in narrow, microfluidic channels and study their coupling through hydrodynamic interactions. Our experiments show that, in contrast to expectations from current theoretical understanding, the hydrodynamic particle-particle interactions are long-range and non-decaying in these channels. This new effect is of fundamental importance for the interpretation of experiments where dense mixtures of particles or molecules diffuse thro...

  12. Method and apparatus for monitoring aircraft components

    DOE Patents [OSTI]

    Dickens, L.M.; Haynes, H.D.; Ayers, C.W.

    1996-01-16T23:59:59.000Z

    Operability of aircraft mechanical components is monitored by analyzing the voltage output of an electrical generator of the aircraft. Alternative generators, for a turbine-driven rotor aircraft, include the gas producer turbine tachometer generator, the power turbine tachometer generator, and the aircraft systems power producing starter/generator. Changes in the peak amplitudes of the fundamental frequency and its harmonics are correlated to changes in condition of the mechanical components. 14 figs.

  13. Method and apparatus for monitoring aircraft components

    DOE Patents [OSTI]

    Dickens, Larry M. (Oak Ridge, TN); Haynes, Howard D. (Knoxville, TN); Ayers, Curtis W. (Clinton, TN)

    1996-01-01T23:59:59.000Z

    Operability of aircraft mechanical components is monitored by analyzing the voltage output of an electrical generator of the aircraft. Alternative generators, for a turbine-driven rotor aircraft, include the gas producer turbine tachometer generator, the power turbine tachometer generator, and the aircraft systems power producing starter/generator. Changes in the peak amplitudes of the fundamental frequency and its harmonics are correlated to changes in condition of the mechanical components.

  14. AIAA 20033698 Aircraft Gas Turbine Engine

    E-Print Network [OSTI]

    Stanford University

    AIAA 20033698 Aircraft Gas Turbine Engine Simulations W. C. Reynolds , J. J. Alonso, and M. Fatica, Reston, VA 201914344 #12;AIAA 20033698 Aircraft Gas Turbine Engine Simulations W. C. Reynolds , J. J of the flowpath through complete aircraft gas turbines including the compressor, combustor, turbine, and secondary

  15. Gain narrowing in few-atom systems

    E-Print Network [OSTI]

    Tom Savels; Allard P. Mosk; Ad Lagendijk

    2006-05-31T23:59:59.000Z

    Using a density matrix approach, we study the simplest systems that display both gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The other atoms supply feedback through multiple scattering of light. We show that, if the atoms are in each other's near-field, the system exhibits large gain narrowing and spectral mode redistribution. The observed phenomena are more pronounced if the feedback is enhanced. Our system is to our knowledge the simplest exactly solvable microscopic system which shows the approach to laser oscillation.

  16. Approaches to representing aircraft fuel efficiency performance for the purpose of a commercial aircraft certification standard

    E-Print Network [OSTI]

    Yutko, Brian M. (Brian Matthew)

    2011-01-01T23:59:59.000Z

    Increasing concern over the potential harmful effects of green house gas emissions from various sources has motivated the consideration of an aircraft certification standard as one way to reduce aircraft C02 emissions and ...

  17. Approaches to Representing Aircraft Fuel Efficiency Performance for the Purpose of a Commercial Aircraft Certification Standard

    E-Print Network [OSTI]

    Yutko, Brian

    2011-06-27T23:59:59.000Z

    Increasing concern over the potential harmful effects of green house gas emissions from various sources has motivated the consideration of an aircraft certification standard as one way to reduce aircraft CO2 emissions and ...

  18. Narrow field electromagnetic sensor system and method

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01T23:59:59.000Z

    A narrow field electromagnetic sensor system and method of sensing a characteristic of an object provide the capability to realize a characteristic of an object such as density, thickness, or presence, for any desired coordinate position on the object. One application is imaging. The sensor can also be used as an obstruction detector or an electronic trip wire with a narrow field without the disadvantages of impaired performance when exposed to dirt, snow, rain, or sunlight. The sensor employs a transmitter for transmitting a sequence of electromagnetic signals in response to a transmit timing signal, a receiver for sampling only the initial direct RF path of the electromagnetic signal while excluding all other electromagnetic signals in response to a receive timing signal, and a signal processor for processing the sampled direct RF path electromagnetic signal and providing an indication of the characteristic of an object. Usually, the electromagnetic signal is a short RF burst and the obstruction must provide a substantially complete eclipse of the direct RF path. By employing time-of-flight techniques, a timing circuit controls the receiver to sample only the initial direct RF path of the electromagnetic signal while not sampling indirect path electromagnetic signals. The sensor system also incorporates circuitry for ultra-wideband spread spectrum operation that reduces interference to and from other RF services while allowing co-location of multiple electronic sensors without the need for frequency assignments.

  19. Narrow field electromagnetic sensor system and method

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-11-19T23:59:59.000Z

    A narrow field electromagnetic sensor system and method of sensing a characteristic of an object provide the capability to realize a characteristic of an object such as density, thickness, or presence, for any desired coordinate position on the object. One application is imaging. The sensor can also be used as an obstruction detector or an electronic trip wire with a narrow field without the disadvantages of impaired performance when exposed to dirt, snow, rain, or sunlight. The sensor employs a transmitter for transmitting a sequence of electromagnetic signals in response to a transmit timing signal, a receiver for sampling only the initial direct RF path of the electromagnetic signal while excluding all other electromagnetic signals in response to a receive timing signal, and a signal processor for processing the sampled direct RF path electromagnetic signal and providing an indication of the characteristic of an object. Usually, the electromagnetic signal is a short RF burst and the obstruction must provide a substantially complete eclipse of the direct RF path. By employing time-of-flight techniques, a timing circuit controls the receiver to sample only the initial direct RF path of the electromagnetic signal while not sampling indirect path electromagnetic signals. The sensor system also incorporates circuitry for ultra-wideband spread spectrum operation that reduces interference to and from other RF services while allowing co-location of multiple electronic sensors without the need for frequency assignments. 12 figs.

  20. A dynamic stability analysis of an aircraft passing through the trailing vortices of another aircraft

    E-Print Network [OSTI]

    De Santo, Robert James William

    1972-01-01T23:59:59.000Z

    A DYNAMIC STABILITY ANALYSIS OF AN AIRCRAFT PASSING THROUGH THE TRAILING VORTICES OF ANOTHER AIRCRAFT A Thesi~ x ROBERT J. MAE SANTO, JR. Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE December 1972 Major Subject: Aerospace Engineering A DYNAMIC STABILITY ANALYSIS OF AN AIRCRAFT PASSING THROUGH THE TRAILING VORTICES OF ANOTHER AIRCRAFT A Thesis by ROBERT J. W. DE SANTO) JR. Approved as to style...

  1. A robust guidance system for aircraft approach and landing

    E-Print Network [OSTI]

    Yu, Ren-Jye

    1999-01-01T23:59:59.000Z

    Aircraft approach and landing are very demanding and risky operational phases compared to other routine flight phases. Statistics show that large percentages of aircraft accidents, especially general aviation (GA) aircraft, occur during these phases...

  2. Active Brownian motion in a narrow channel

    E-Print Network [OSTI]

    Xue Ao; Pulak Kumar Ghosh; Yunyun Li; Gerhard Schmid; Peter Hnggi; Fabio Marchesoni

    2014-09-17T23:59:59.000Z

    We review recent advances in rectification control of artificial microswimmers, also known as Janus particles, diffusing along narrow, periodically corrugated channels. The swimmer self-propulsion mechanism is modeled so as to incorporate a nonzero torque (propulsion chirality). We first summarize the effects of chirality on the autonomous current of microswimmers freely diffusing in channels of different geometries. In particular, left-right and upside-down asymmetric channels are shown to exhibit different transport properties. We then report new results on the dependence of the diffusivity of chiral microswimmers on the channel geometry and their own self-propulsion mechanism. The self-propulsion torque turns out to play a key role as a transport control parameter.

  3. aircraft system identification: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    22 23 24 25 Next Page Last Page Topic Index 1 Aircraft System Identification Using Artificial Neural Networks Engineering Websites Summary: Aircraft System Identification Using...

  4. aircraft maintenance planning: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Plants Websites Summary: 415 Statistical estimation of multiple faults in aircraft gas turbine engines S Sarkar, C Rao of multiple faults in aircraft gas-turbine engines, based...

  5. Probing Emissions of Military Cargo Aircraft: Description of...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Emissions of Military Cargo Aircraft: Description of a Joint Field Measurement Strategic Environmental Research and Probing Emissions of Military Cargo Aircraft: Description of a...

  6. aircraft noise: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    technologies. Gundel, Lara 2010-01-01 38 Aircraft Performance: Atmospheric Pressure Energy Storage, Conversion and Utilization Websites Summary: Aircraft Performance:...

  7. aircraft carrier program: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Consumption of an Aircraft Carrier . Open Access Theses and Dissertations Summary: ??Speed and propulsion fuel consumption characteristics of United States aircraft carriers are...

  8. aircraft by speed: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    model of a commercial aircraft Fernandez, Thomas 5 Aircraft deconfliction with speed regulation: new models from mixed-integer optimization Computer Technologies and...

  9. aircraft cabin safety: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  10. air force aircraft: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  11. aircraft cabin section: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  12. aircraft cabins: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  13. aircraft cabin noise: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  14. aircraft exhaust aerosol: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  15. aircraft load measurement: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  16. aircraft structural design: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    system for aging aircraft Giurgiutiu, Victor 100 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  17. aircraft cabin environment: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Window Location on a King Air 200 Aircraft:aerosol.atmos.und.edu) Objective A Raytheon Beechcraft King Air 200 aircraft has been used to obtain Condensation Particle...

  18. aircraft deicing fluid: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cascading in Aircraft Design James Allison(1) , David Walsh(2) , Michael successfully to automotive design, this article introduces the application of ATC to aircraft design, and...

  19. aircraft noise exposure: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    paths minimizing aircraft noise d'Orlans, Universit 2 The cost of noise reduction in commercial tilt rotor aircraft MIT - DSpace Summary: The relationship between...

  20. aircraft engine noise: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    paths minimizing aircraft noise d'Orlans, Universit 2 The cost of noise reduction in commercial tilt rotor aircraft MIT - DSpace Summary: The relationship between...

  1. Aircraft System Identification Using Artificial Neural Networks

    E-Print Network [OSTI]

    Valasek, John

    Aircraft System Identification Using Artificial Neural Networks Kenton Kirkpatrick , Jim May Jr linear system identification for aircraft using artificial neural net- works. The output of a linear the correct model. In this paper, a new method of system identification is proposed that uses artificial

  2. Emerging NDE Technology for aging aircraft

    SciTech Connect (OSTI)

    Moore, D.G.; Perry, R.L.

    1998-03-01T23:59:59.000Z

    This paper presents an overview of several emerging nondestructive evaluation technologies that are being employed or considered for use to inspect commercial transport, commuter aircraft and military aircraft. An overview of the Federal Aviation Administration (FAA) Airworthiness Assurance NDI Validation Center (AANC) is described and how AANC teams with industry, universities, and other federal entities to assess these technologies.

  3. Tunable pulsed narrow bandwidth light source

    DOE Patents [OSTI]

    Powers, Peter E. (Dayton, OH); Kulp, Thomas J. (Livermore, CA)

    2002-01-01T23:59:59.000Z

    A tunable pulsed narrow bandwidth light source and a method of operating a light source are provided. The light source includes a pump laser, first and second non-linear optical crystals, a tunable filter, and light pulse directing optics. The method includes the steps of operating the pump laser to generate a pulsed pump beam characterized by a nanosecond pulse duration and arranging the light pulse directing optics so as to (i) split the pulsed pump beam into primary and secondary pump beams; (ii) direct the primary pump beam through an input face of the first non-linear optical crystal such that a primary output beam exits from an output face of the first non-linear optical crystal; (iii) direct the primary output beam through the tunable filter to generate a sculpted seed beam; and direct the sculpted seed beam and the secondary pump beam through an input face of the second non-linear optical crystal such that a secondary output beam characterized by at least one spectral bandwidth on the order of about 0.1 cm.sup.-1 and below exits from an output face of the second non-linear optical crystal.

  4. Statistical estimation of multiple faults in aircraft gas turbine engines

    E-Print Network [OSTI]

    Ray, Asok

    415 Statistical estimation of multiple faults in aircraft gas turbine engines S Sarkar, C Rao of multiple faults in aircraft gas-turbine engines, based on a statistical pattern recognition tool called commercial aircraft engine. Keywords: aircraft propulsion, gas turbine engines, multiple fault estimation

  5. Aircraft System Identification Using Artificial Neural Networks

    E-Print Network [OSTI]

    Valasek, John

    Aircraft System Identification Using Artificial Neural Networks Kenton Kirkpatrick Jim May Jr. John Meeting January 9, 2013 Compos Volatus #12;Overview Motivation System Identification Artificial Neural Networks 2 Artificial Neural Networks ANNSID Conclusions and Open Challenges #12;Motivation 3 #12

  6. Scaling considerations for small aircraft engines

    E-Print Network [OSTI]

    Chan, Nicholas Y. S

    2008-01-01T23:59:59.000Z

    Small aircraft engines traditionally have poorer performance compared to larger engines, which until recently, has been a factor that outweighed the aerodynamic benefits of commoditized and distributed propulsion. Improvements ...

  7. Emerging nondestructive inspection methods for aging aircraft

    SciTech Connect (OSTI)

    Beattie, A; Dahlke, L; Gieske, J [and others

    1994-01-01T23:59:59.000Z

    This report identifies and describes emerging nondestructive inspection (NDI) methods that can potentially be used to inspect commercial transport and commuter aircraft for structural damage. The nine categories of emerging NDI techniques are: acoustic emission, x-ray computed tomography, backscatter radiation, reverse geometry x-ray, advanced electromagnetics, including magnetooptic imaging and advanced eddy current techniques, coherent optics, advanced ultrasonics, advanced visual, and infrared thermography. The physical principles, generalized performance characteristics, and typical applications associated with each method are described. In addition, aircraft inspection applications are discussed along with the associated technical considerations. Finally, the status of each technique is presented, with a discussion on when it may be available for use in actual aircraft maintenance programs. It should be noted that this is a companion document to DOT/FAA/CT-91/5, Current Nondestructive Inspection Methods for Aging Aircraft.

  8. Direct band gap narrowing in highly doped Ge

    E-Print Network [OSTI]

    Han, Zhaohong

    Direct band gap narrowing in highly doped n-type Ge is observed through photoluminescence measurements by determining the spectrum peak shift. A linear relationship between the direct band gap emission and carrier concentration ...

  9. Further evidence for narrow exotic low mass baryons

    E-Print Network [OSTI]

    B. Tatischeff

    2004-04-29T23:59:59.000Z

    Although narrow low mass baryonic structures, observed mainly in SPES3 (Saturne) data, were not confirmed in recent experiments using lepton probes, their existence is confirmed in other data, where hadronic probes were used.

  10. Comment on the narrow structure reported by Amaryan et al

    E-Print Network [OSTI]

    M. Anghinolfi; J. Ball; N. A. Baltzell; M. Battaglieri; I. Bedlinskiy; M. Bellis; A. S. Biselli; C. Bookwalter; S. Boiarinov; P. Bosted; V. D. Burkert; D. S. Carman; A. Celentano; S. Chandavar; P. L. Cole; V. Crede; R. De Vita; E. De Sanctis; B. Dey; R. Dickson; D. Doughty; M. Dugger; R. Dupre; H. Egiyan; A. El Alaoui; L. El Fassi; L. Elouadrhiri; P. Eugenio; G. Fedotov; M. Y. Gabrielyan; M. Garcon; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; E. Golovatch; M. Guidal; L. Guo; K. Hafidi; H. Hakobyan; D. Heddle; K. Hicks; M. Holtrop; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; H. S. Jo; K. Joo; P. Khetarpal; A. Kim; W. Kim; V. Kubarovsky; S. V. Kuleshov; H. Y. Lu; L. J. D. MacGregor; N. Markov; M. E. McCracken; B. McKinnon; M. D. Mestayer; C. A. Meyer; M. Mirazita; V. Mokeev; K. Moriya; B. Morrison; A. Ni; S. Niccolai; G. Niculescu; I. Niculescu; M. Osipenko; A. I Ostrovidov; K. Park; S. Park; S. Anefalos Pereira; S. Pisano; O. Pogorelko; S. Pozdniakov; J. W. Price; G. Ricco; M. Ripani; B. G. Ritchie; P. Rossi; D. Schott; R. A. Schumacher; E. Seder; Y. G. Sharabian; E. S. Smith; D. I Sober; S. S. Stepanyan; P. Stoler; W. Tang; M. Ungaro; B. Vernarsky; M. F. Vineyard; D. P. Weygand; M. H. Wood; N. Zachariou; B. Zhao

    2012-04-05T23:59:59.000Z

    The CLAS Collaboration provides a comment on the physics interpretation of the results presented in a paper published by M. Amaryan et al. regarding the possible observation of a narrow structure in the mass spectrum of a photoproduction experiment.

  11. An Aircraft Electric Power Testbed for Validating Automatically Synthesized Reactive Control Protocols

    E-Print Network [OSTI]

    Xu , Huan

    An Aircraft Electric Power Testbed for Validating Automatically Synthesized Reactive Control reactive synthesis; testbed; aircraft electric power system 1. INTRODUCTION AND MOTIVATION Aircraft of Pennsylvania utopcu@seas.upenn.edu ABSTRACT Modern aircraft increasingly rely on electric power for sub

  12. The cost of noise reduction in commercial tilt rotor aircraft

    E-Print Network [OSTI]

    Faulkner, Henry B.

    1974-01-01T23:59:59.000Z

    The relationship between direct operating cost and departure noise annoyance was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt rotor aircraft designs to meet various ...

  13. aircraft ground operations: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of a Tilt Rotor Aircraft Wake in Ground Effect, (May 19B2) Michael Louis Frey III, B. S. , Texas A... Frey, Michael Louis 2012-06-07 22 Aircraft Ground Traffic Optimization...

  14. SPLAT II: An Aircraft Compatible, Ultra-Sensitive, High Precision...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SPLAT II: An Aircraft Compatible, Ultra-Sensitive, High Precision Instrument for In-Situ Characterization of the Size and SPLAT II: An Aircraft Compatible, Ultra-Sensitive, High...

  15. Detection of aeroacoustic sound sources on aircraft and wind turbines

    E-Print Network [OSTI]

    Twente, Universiteit

    Detection of aeroacoustic sound sources on aircraft and wind turbines Stefan Oerlemans #12;Detection of aeroacoustic sound sources on aircraft and wind turbines S. Oerlemans Thesis University;DETECTION OF AEROACOUSTIC SOUND SOURCES ON AIRCRAFT AND WIND TURBINES PROEFSCHRIFT ter verkrijging van de

  16. Aircraft Integrity and Reliability Carlos Ferregut

    E-Print Network [OSTI]

    Kreinovich, Vladik

    @unm.edu Abstract. In his recent paper "Probability theory needs an infusion of fuzzy logic to enhance its ability to deal with real-world problems", L. A. Zadeh explains that probability theory needs an infusion of fuzzy of a real-world problem for which such an infusion is indeed successful: the problems of aircraft integrity

  17. A Ubiquitous Computing Environment for Aircraft Maintenance

    E-Print Network [OSTI]

    practical experience from a project that was carried out in cooperation with an aircraft company1 and SAP SI level of usability. A scenario, a systems architecture, and maintenance applications are presented Descriptors J.7 [Computer Applications]: Computers in Other Systems industrial control, process control

  18. The multi-stop aircraft routing problem

    E-Print Network [OSTI]

    Garci?a Castan?eda, Salvador

    1995-01-01T23:59:59.000Z

    of passengers over the route. The objective function is the net result of the difference between revenues per passenger carried and aircraft operating costs. The model takes the form of a 0/1 mixed integer linear program and describe formulation refinements...

  19. Narrow gap welding with the hot wire GTA process

    SciTech Connect (OSTI)

    Cook, G.E.; Levick, P.C.

    1985-08-01T23:59:59.000Z

    Narrow gap welding offers the promise of dramatically improved weld completion rates and reduced heat input for welding of butt joints in materials of 10 mm (0.4 in.) section thickness and larger. Techniques for successful welding of narrow gap joint preparations have been discussed in the literature for approximately twenty years, with the majority of these based on the consumable electrode processes. Gas tungsten arc welding with cold wire filler addition has been shown to be capable of narrow gap welding although limited deposition rate capability has not made this a competitive alternative. The GTAW process offers the advantages of superior penetration control for one-sided welding of butt joints, as well as the potential for reducing incomplete fusion defects. The addition of hot wire filler metal to the gas tungsten arc provides an attractive alternative that combines high deposition rate capability and independent control of heat input.

  20. Computational fire modeling for aircraft fire research

    SciTech Connect (OSTI)

    Nicolette, V.F.

    1996-11-01T23:59:59.000Z

    This report summarizes work performed by Sandia National Laboratories for the Federal Aviation Administration. The technical issues involved in fire modeling for aircraft fire research are identified, as well as computational fire tools for addressing those issues, and the research which is needed to advance those tools in order to address long-range needs. Fire field models are briefly reviewed, and the VULCAN model is selected for further evaluation. Calculations are performed with VULCAN to demonstrate its applicability to aircraft fire problems, and also to gain insight into the complex problem of fires involving aircraft. Simulations are conducted to investigate the influence of fire on an aircraft in a cross-wind. The interaction of the fuselage, wind, fire, and ground plane is investigated. Calculations are also performed utilizing a large eddy simulation (LES) capability to describe the large- scale turbulence instead of the more common k-{epsilon} turbulence model. Additional simulations are performed to investigate the static pressure and velocity distributions around a fuselage in a cross-wind, with and without fire. The results of these simulations provide qualitative insight into the complex interaction of a fuselage, fire, wind, and ground plane. Reasonable quantitative agreement is obtained in the few cases for which data or other modeling results exist Finally, VULCAN is used to quantify the impact of simplifying assumptions inherent in a risk assessment compatible fire model developed for open pool fire environments. The assumptions are seen to be of minor importance for the particular problem analyzed. This work demonstrates the utility of using a fire field model for assessing the limitations of simplified fire models. In conclusion, the application of computational fire modeling tools herein provides both qualitative and quantitative insights into the complex problem of aircraft in fires.

  1. Exotic low mass narrow baryons extracted from charge exchange reactions

    E-Print Network [OSTI]

    B. Tatischeff; E. Tomasi-Gustafsson

    2010-02-12T23:59:59.000Z

    This paper aims to give further evidence for the existence of low mass exotic baryons. Narrow structures in baryonic missing mass or baryonic invariant mass were observed during the last twelve years. Since their evidence is still under debate, various data, measured with incident hadrons, by different collaborations, are reanalyzed to bring evidence on these narrow exotic baryonic resonances excited in charge-exchange reactions. These structures are clearly exotic as there is no room for them in the $qqq$ configurations: their width is smaller than the widths of "classical" baryonic resonances, moreover some of the masses lie below the pion threshold mass.

  2. Cooling by Flow Through Narrow Pores W. J. Mullin1

    E-Print Network [OSTI]

    Mullin, William J.

    Cooling by Flow Through Narrow Pores W. J. Mullin1 and Neal Kalechofsky2 1 Physics Department., 130A Baker Avenue, Concord, MA, 01742, USA Abstract. We consider the possibility of cooling 3 He atoms or channels. The proposed method is somewhat analogous to that employed to evaporatively cool trapped gases

  3. On Finding Narrow Passages with Probabilistic Roadmap Planners

    E-Print Network [OSTI]

    Pratt, Vaughan

    On Finding Narrow Passages with Probabilistic Roadmap Planners David Hsu, Stanford University University, Stanford, CA, USA A probabilistic roadmap is a network of simple paths connecting collisionfree configurations obtained by sampling a robot's configuration space at random. Several probabilistic roadmap

  4. Combining Lazy Narrowing and Simpli cation ? Michael Hanus

    E-Print Network [OSTI]

    Hanus, Michael

    with a complete operational semantics are based on narrowing. In order to avoid useless computations and to deal was supported in part by the German Ministry for Research and Technology (BMFT) under grant ITS 9103. Similarly to pure functional programming, such a lazy strat- egy avoids some useless steps in comparison

  5. The multi-stop aircraft routing problem

    E-Print Network [OSTI]

    Garci?a Castan?eda, Salvador

    1995-01-01T23:59:59.000Z

    Approved as to style and content by: Alberto Garcia-Diaz (Chair of Committee) Ce O. ave em ) Ta-Hsin Li (Member) ay Kuo (Head of Departement) December 1995 Major Subject: Industrial Engineering ABSTRACT The Multi-Stop Aircraft Routing Problem.... (December 1995) Salvador Garcia, B. S. , Nuevo Leon State University; M. S. , Monterrey Tech Chair of Advisory Committee: Dr. Alberto Garcia-Diaz We study the multi-stop aircrafi routing problem, determining the sequence of stops and the number...

  6. Studying impact damage on carbon-fiber reinforced aircraft composite panels with sonicir

    SciTech Connect (OSTI)

    Han Xiaoyan; Zhang Ding; He Qi; Song Yuyang; Lubowicki, Anthony [Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202 (United States); Zhao Xinyue; Newaz, Golam. [Department of Mechanical Engineering, Wayne State University, Detroit, MI 48202 (United States); Favro, Lawrence D.; Thomas, Robert L. [Department of Physics and Astronomy, Wayne State University, Detroit, MI 48202 (United States)

    2011-06-23T23:59:59.000Z

    Composites are becoming more important materials in commercial aircraft structures such as the fuselage and wings with the new B787 Dreamliner from Boeing which has the target to utilize 50% by weight of composite materials. Carbon-fiber reinforced composites are the material of choice in aircraft structures. This is due to their light weight and high strength (high strength-to-weight ratio), high specific stiffness, tailorability of properties, design flexibility etc. Especially, by reducing the aircraft's body weight by using such lighter structures, the cost of fuel can be greatly reduced with the high jet fuel price for commercial airlines. However, these composites are prone to impact damage and the damage may occur without any observable sign on the surface, yet resulting in delaminations and disbonds that may occur well within the layers. We are studying the impact problem with carbon-fiber reinforced composite panels and developing SonicIR for this application as a fast and wide-area NDE technology. In this paper, we present our results in studying composite structures including carbon-fiber reinforced composite materials, and preliminary quantitative studies on delamination type defect depth identification in the panels.

  7. Using doppler radar images to estimate aircraft navigational heading error

    DOE Patents [OSTI]

    Doerry, Armin W. (Albuquerque, NM); Jordan, Jay D. (Albuquerque, NM); Kim, Theodore J. (Albuquerque, NM)

    2012-07-03T23:59:59.000Z

    A yaw angle error of a motion measurement system carried on an aircraft for navigation is estimated from Doppler radar images captured using the aircraft. At least two radar pulses aimed at respectively different physical locations in a targeted area are transmitted from a radar antenna carried on the aircraft. At least two Doppler radar images that respectively correspond to the at least two transmitted radar pulses are produced. These images are used to produce an estimate of the yaw angle error.

  8. Narrow groove welding gas diffuser assembly and welding torch

    DOE Patents [OSTI]

    Rooney, Stephen J. (East Berne, NY)

    2001-01-01T23:59:59.000Z

    A diffuser assembly is provided for narrow groove welding using an automatic gas tungsten arc welding torch. The diffuser assembly includes a manifold adapted for adjustable mounting on the welding torch which is received in a central opening in the manifold. Laterally extending manifold sections communicate with a shield gas inlet such that shield gas supplied to the inlet passes to gas passages of the manifold sections. First and second tapered diffusers are respectively connected to the manifold sections in fluid communication with the gas passages thereof. The diffusers extend downwardly along the torch electrode on opposite sides thereof so as to release shield gas along the length of the electrode and at the distal tip of the electrode. The diffusers are of a transverse width which is on the order of the thickness of the electrode so that the diffusers can, in use, be inserted into a narrow welding groove before and after the electrode in the direction of the weld operation.

  9. NARROW ATOMIC FEATURES FROM RAPIDLY SPINNING NEUTRON STARS

    SciTech Connect (OSTI)

    Bauboeck, Michi; Psaltis, Dimitrios; Oezel, Feryal, E-mail: mbaubock@email.arizona.edu, E-mail: dpsaltis@email.arizona.edu, E-mail: fozel@email.arizona.edu [Astronomy Department, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)] [Astronomy Department, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

    2013-04-01T23:59:59.000Z

    Neutron stars spinning at moderate rates ({approx}300-600 Hz) become oblate in shape and acquire a nonzero quadrupole moment. In this paper, we calculate the profiles of atomic features from such neutron stars using a ray-tracing algorithm in the Hartle-Thorne approximation. We show that line profiles acquire cores that are much narrower than the widths expected from pure Doppler effects for a large range of observer inclinations. As a result, the effects of both the oblateness and the quadrupole moments of neutron stars need to be taken into account when aiming to measure neutron-star radii from rotationally broadened lines. Moreover, the presence of these narrow cores substantially increases the likelihood of detecting atomic lines from rapidly spinning neutron stars.

  10. Analysis of ultra-narrow ferromagnetic domain walls

    SciTech Connect (OSTI)

    Jenkins, Catherine; Paul, David

    2012-01-10T23:59:59.000Z

    New materials with high magnetic anisotropy will have domains separated by ultra-narrow ferromagnetic walls with widths on the order of a few unit cells, approaching the limit where the elastic continuum approximation often used in micromagnetic simulations is accurate. The limits of this approximation are explored, and the static and dynamic interactions with intrinsic crystalline defects and external driving #12;elds are modeled. The results developed here will be important when considering the stability of ultra-high-density storage media.

  11. advanced cargo aircraft: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Open Access Theses and Dissertations Summary: ??Radical aircraft and propulsion system architecture changes may be required to continue historic performance improvement...

  12. aircraft conceptual design: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Ausrotas, Raymond A. 1974-01-01 469 Optimal Load Management System for Aircraft Electric Power Distribution University of California eScholarship Repository Summary: to the...

  13. aircraft emission inventories: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Raymond A. 1974-01-01 340 Optimal Load Management System for Aircraft Electric Power Distribution University of California eScholarship Repository Summary: to the...

  14. aircraft engine crash: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Aircraft Accident," Crash Injury Res., Phoenix, Arizona (October 18, 1961). 4. Bruggink, G. M. eta., "Injury Reduction Trends in Agricultural Aviation," A m-MnM 35,...

  15. aircraft crash impact: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Aircraft Accident," Crash Injury Res., Phoenix, Arizona (October 18, 1961). 4. Bruggink, G. M. eta., "Injury Reduction Trends in Agricultural Aviation," A m-MnM 35,...

  16. aircraft accidentally crashing: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Aircraft Accident," Crash Injury Res., Phoenix, Arizona (October 18, 1961). 4. Bruggink, G. M. eta., "Injury Reduction Trends in Agricultural Aviation," A m-MnM 35,...

  17. aircraft noise annoyance: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    including safety aspects. The investigations and experiments in the multinational European project Vormann, Matthias 14 APPENDIX E REVIEW OF EFFECTS OF AIRCRAFT NOISE, CHAFF,...

  18. Electrical Generation for More-Electric Aircraft using Solid...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Aircraft using Solid Oxide Fuel Cells More Documents & Publications Solid Oxide Fuel Cell (SOFC) Technology for Greener Airplanes Solid Oxide Fuel Cell and Power System...

  19. aircraft integrated vehicle: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    C. Reynolds , J. J of the flowpath through complete aircraft gas turbines including the compressor, combustor, turbine, and secondary Stanford University 160 A Ubiquitous...

  20. aircraft fuel conservation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    concern over the potential harmful effects of green house gas emissions from various sources has motivated the consideration of an aircraft certification standard as one way to...

  1. Aging Aircraft NDI Development and Demonstration Center (AANC): An overview

    SciTech Connect (OSTI)

    Walter, P.L.

    1991-01-01T23:59:59.000Z

    A major center with emphasis on validation of nondestructive inspection techniques for aging aircraft, the Aging Aircraft NDI Development and Demonstration Center (AANC), has been funded by the FAA at Sandia National Laboratories. The Center has been assigned specific tasks in developing techniques for the nondestructive inspection of static engine parts, assessing inspection reliability (POD experiments), developing test beds for nondestructive inspection validation, maintaining a FAA library of characterized aircraft structural test specimens, and leasing a hangar to house a high flight cycle transport aircraft for use as a full scale test bed. 3 refs.

  2. aircraft composite structures: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Aircraft. Open Access Theses and Dissertations Summary: ??High-performance composite materials exhibit both anisotropic strength and stiffness properties. These anisotropic...

  3. Electrical Generation for More-Electric Aircraft using Solid...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    by Pacific Northwest National Laboratory, examines approaches to providing electrical power on board commercial aircraft using solid oxide fuel (SOFC) technology. The focus of...

  4. aircraft nacelle structures: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    VICTOR field opens the way for a comprehensive multifunctional damage detection system for aging aircraft Management System (SHMS) architecture for the aging military...

  5. aircraft fuel systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Structure Background and Program Overview 135 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  6. aircraft propulsion systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    College of Nuclear Science Zha, Gecheng 160 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  7. aircraft production: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    low ozone 65 Process improvements during production ramp-up MIT - DSpace Summary: Raytheon Company is currently ramping up production radars for a fighter aircraft. This...

  8. aircraft engine missile: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    turbine, and secondary Stanford University 3 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  9. aircraft missiles weapons: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Candidate, Computer Science Dept Rasheed, Khaled 2 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  10. Photonic bandgap narrowing in conical hollow core Bragg fibers

    SciTech Connect (OSTI)

    Ozturk, Fahri Emre; Yildirim, Adem; Kanik, Mehmet [UNAM-National Nanotechnology Research Center, Bilkent University, 06800 Ankara (Turkey); Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara (Turkey); Bayindir, Mehmet, E-mail: bayindir@nano.org.tr [UNAM-National Nanotechnology Research Center, Bilkent University, 06800 Ankara (Turkey); Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara (Turkey); Department of Physics, Bilkent University, 06800 Ankara (Turkey)

    2014-08-18T23:59:59.000Z

    We report the photonic bandgap engineering of Bragg fibers by controlling the thickness profile of the fiber during the thermal drawing. Conical hollow core Bragg fibers were produced by thermal drawing under a rapidly alternating load, which was applied by introducing steep changes to the fiber drawing speed. In conventional cylindrical Bragg fibers, light is guided by omnidirectional reflections from interior dielectric mirrors with a single quarter wave stack period. In conical fibers, the diameter reduction introduced a gradient of the quarter wave stack period along the length of the fiber. Therefore, the light guided within the fiber encountered slightly smaller dielectric layer thicknesses at each reflection, resulting in a progressive blueshift of the reflectance spectrum. As the reflectance spectrum shifts, longer wavelengths of the initial bandgap cease to be omnidirectionally reflected and exit through the cladding, which narrows the photonic bandgap. A narrow transmission bandwidth is particularly desirable in hollow waveguide mid-infrared sensing schemes, where broadband light is coupled to the fiber and the analyte vapor is introduced into the hollow core to measure infrared absorption. We carried out sensing simulations using the absorption spectrum of isopropyl alcohol vapor to demonstrate the importance of narrow bandgap fibers in chemical sensing applications.

  11. E-Print Network 3.0 - aircraft scanner mapping Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MAP by several aircraft. With a few... aircraft is ... Source: NASA - Center-TRACTION Automation System (CTAS) Collection: Energy Storage, Conversion and Utilization 8 Mapping...

  12. E-Print Network 3.0 - aircraft exhaust sulfur Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    gases FAA, 2005. Water in the aircraft exhaust at altitude may have a greenhouse effect... . Aircraft exhaust emissions are calculated for the ... Source: Ecole...

  13. E-Print Network 3.0 - army aircraft Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sector Summary: of rotary wing DOD aircraft, aircraft crash analysis, and lubricating oil analysis. Tobyhanna Army Depot... Aeronautics and Space Administration (NASA)....

  14. Exploration and assessment of the environmental design space for commercial aircraft and future technologies

    E-Print Network [OSTI]

    Barter, Garrett E. (Garrett Ehud), 1979-

    2004-01-01T23:59:59.000Z

    Design and regulatory initiatives for aircraft noise and emissions should appreciate the integrated nature of the aircraft system. The computational ability exists to consider environmental and traditional performance ...

  15. Wind parameters extraction from aircraft trajectories C. Hurtera,

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Wind parameters extraction from aircraft trajectories C. Hurtera, , R. Alligiera,b , D. Gianazzaa traffic controllers need to know the current wind magnitude and direction since they impact every flying vessel. The wind may accel- erate or slow down an aircraft, depending on its relative direction

  16. Fault prediction in aircraft engines using Self-Organizing Maps

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Fault prediction in aircraft engines using Self- Organizing Maps Marie Cottrell1 , Patrice Gaubert1. Aircraft engines are designed to be used during several tens of years. Their maintenance is a challenging and costly task, for obvious security reasons. The goal is to ensure a proper operation of the engines

  17. Wireless Sensor Network for Aircraft Health Monitoring Honeywell Labs

    E-Print Network [OSTI]

    Minnesota, University of

    Wireless Sensor Network for Aircraft Health Monitoring Haowei Bai Honeywell Labs 3660 Technology of applications. The objective of this article is to describe a wireless sensor network for monitoring of the health of aircraft engines. We describe the architec- ture of the wireless sensor network along with how

  18. Ris-R-1324(EN) Multi Aircraft Training Environment

    E-Print Network [OSTI]

    Risø-R-1324(EN) MATE Multi Aircraft Training Environment G. Hauland, T. Bove, H.B. Andersen and S National Laboratory, Roskilde January 2002 #12;Abstract A medium fidelity and low cost training device for pilots, called the Multi Aircraft Training Environment (MATE), is developed to replace other low fidelity

  19. Symbolic identification for fault detection in aircraft gas turbine engines

    E-Print Network [OSTI]

    Ray, Asok

    Symbolic identification for fault detection in aircraft gas turbine engines S Chakraborty, S Sarkar and computationally inexpensive technique of component-level fault detection in aircraft gas-turbine engines identification, gas turbine engines, language-theoretic analysis 1 INTRODUCTION The propulsion system of modern

  20. A New Methodology for Aircraft HVDC Power Systems design

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A New Methodology for Aircraft HVDC Power Systems design D. Hernández, M. Sautreuil, N. Retière, D-mail: olivier.sename@gipsa-lab.inpg.fr Abstract ­ A new methodology for aircraft HVDC power systems design

  1. Data Mining For Prediction of Aircraft Component Replacement

    E-Print Network [OSTI]

    Matwin, Stan

    Data Mining For Prediction of Aircraft Component Replacement Sylvain Letourneau1 Fazel Famili1 Stan the number of delays, and increasing the overall level of safety. Several data mining techniques exist from the data obtained during the operation and maintenance of aircraft is extremely challenging. Di

  2. Modular Termination of Basic Narrowing Maria Alpuente, Santiago Escobar, and Jose Iborra

    E-Print Network [OSTI]

    Escobar, Santiago

    Modular Termination of Basic Narrowing Mar´ia Alpuente, Santiago Escobar, and Jos´e Iborra theories. Another application is analyzing ter- mination of narrowing by checking the termination of basic narrowing, as done in pioneering work by Hullot. In this work, we study the modu- larity of termination

  3. Frequency Analysis of Aircraft hazards for License Application

    SciTech Connect (OSTI)

    K. Ashley

    2006-10-24T23:59:59.000Z

    The preclosure safety analysis for the monitored geologic repository at Yucca Mountain must consider the hazard that aircraft may pose to surface structures. Relevant surface structures are located beneath the restricted airspace of the Nevada Test Site (NTS) on the eastern slope of Yucca Mountain, near the North Portal of the Exploratory Studies Facility Tunnel (Figure 1). The North Portal is located several miles from the Nevada Test and Training Range (NTTR), which is used extensively by the U.S. Air Force (USAF) for training and test flights (Figure 1). The NTS airspace, which is controlled by the U.S. Department of Energy (DOE) for NTS activities, is not part of the NTTR. Agreements with the DOE allow USAF aircraft specific use of the airspace above the NTS (Reference 2.1.1 [DIRS 103472], Section 3.1.1 and Appendix A, Section 2.1; and Reference 2.1.2 [DIRS 157987], Sections 1.26 through 1.29). Commercial, military, and general aviation aircraft fly within several miles to the southwest of the repository site in the Beatty Corridor, which is a broad air corridor that runs approximately parallel to U.S. Highway 95 and the Nevada-California border (Figure 2). These aircraft and other aircraft operations are identified and described in ''Identification of Aircraft Hazards'' (Reference 2.1.3, Sections 6 and 8). The purpose of this analysis is to estimate crash frequencies for aircraft hazards identified for detailed analysis in ''Identification of Aircraft Hazards'' (Reference 2.1.3, Section 8). Reference 2.1.3, Section 8, also identifies a potential hazard associated with electronic jamming, which will be addressed in this analysis. This analysis will address only the repository and not the transportation routes to the site. The analysis is intended to provide the basis for: (1) Categorizing event sequences related to aircraft hazards; (2) Identifying design or operational requirements related to aircraft hazards.

  4. Leading the way in aircraft noise reduction Aircraft noise threatens the growth of the important UK aerospace manufacturing sector.

    E-Print Network [OSTI]

    Sbester, Andrs

    of Computational Aero-acoustics, Phil Joseph, Professor of acoustical engineering and turbo-machinery noise and Dr method for reducing fan noise, the largest single source of engine noise both at take-off and approachLeading the way in aircraft noise reduction Aircraft noise threatens the growth of the important UK

  5. Certification of an agricultural spray aircraft on ethanol fuel

    SciTech Connect (OSTI)

    Shauck, M.E.; Zanin, M.G. [Baylor Univ., Waco, TX (United States)

    1994-12-31T23:59:59.000Z

    A Piper Pawnee, one of the most common agricultural spray aircraft, is currently undergoing Federal Aviation Administration (FAA) certification to allow the use of denatured ethanol as its fuel. This certification is part of a broader effort to introduce ethanol as a replacement for aviation gasoline. Various reasons brought about the choice of an agricultural spray aircraft to be certified on ethanol. One is the minimization of initial fuel distribution problems. Agricultural aviation often requires only single fuel storage since most of the flying is local. Additionally, corn-produced ethanol is the natural fuel of choice for farming operations. The increased power developed on ethanol compared to aviation gasoline (avgas) is very important when operating heavily loaded spray aircraft at very low altitudes. The power-plant, a Lycoming IO-540, is already certified. The aircraft is currently flying on ethanol in order to satisfy the airframe requirements. The effort is being supported by a consortium of organizations of corn-producing states. Upon completion of certification, the aircraft will be demonstrated around the mid-western states. Certification will allow the use of the aircraft in the commercial arena. Many mid-western agricultural spray operations and ag-pilots have already expressed interest in converting their aircraft to ethanol fuel.

  6. On optimization of sensor selection for aircraft gas turbine engines Ramgopal Mushini

    E-Print Network [OSTI]

    Simon, Dan

    for generating an optimal sensor set [3]. 3. Aircraft gas turbine engines An aircraft gas turbine engineOn optimization of sensor selection for aircraft gas turbine engines Ramgopal Mushini Cleveland sets for the problem of aircraft gas turbine engine health parameter estimation. The performance metric

  7. Engineering integrated pure narrow-band photon sources

    E-Print Network [OSTI]

    Enrico Pomarico; Bruno Sanguinetti; Clara I. Osorio; Harald Herrmann; Rob Thew

    2011-08-29T23:59:59.000Z

    Engineering and controlling well defined states of light for quantum information applications is of increasing importance as the complexity of quantum systems grows. For example, in quantum networks high multi-photon interference visibility requires properly devised single mode sources. In this paper we propose a spontaneous parametric down conversion source based on an integrated cavity-waveguide, where single narrow-band, possibly distinct, spectral modes for the idler and the signal fields can be generated. This mode selection takes advantage of the clustering effect, due to the intrinsic dispersion of the nonlinear material. In combination with a CW laser and fast detection, our approach provides a means to engineer a source that can efficiently generate pure photons, without filtering, that is compatible with long distance quantum communication. Furthermore, it is extremely flexible and could easily be adapted to a wide variety of wavelengths and applications.

  8. Forced transport of deformable containers through narrow constrictions

    E-Print Network [OSTI]

    Remy Kusters; Thijs van der Heijden; Badr Kaoui; Jens Harting; Cornelis Storm

    2014-11-19T23:59:59.000Z

    We study, numerically and analytically, the forced transport of deformable containers through a narrow constriction. Our central aim is to quantify the competition between the constriction geometry and the active forcing, regulating whether and at which speed a container may pass through the constriction and under what conditions it gets stuck. We focus, in particular, on the interrelation between the force that propels the container and the radius of the channel, as these are the external variables that may be directly controlled in both artificial and physiological settings. We present Lattice-Boltzmann simulations that elucidate in detail the various phases of translocation, and present simplified analytical models that treat two limiting types of these membrane containers: deformational energy dominated by the bending or stretching contribution. In either case we find excellent agreement with the full simulations, and our results reveal that not only the radius but also the length of the constriction determines whether or not the container will pass.

  9. Long-pulse-width narrow-bandwidth solid state laser

    DOE Patents [OSTI]

    Dane, C. Brent (Livermore, CA); Hackel, Lloyd A. (Livermore, CA)

    1997-01-01T23:59:59.000Z

    A long pulse laser system emits 500-1000 ns quasi-rectangular pulses at 527 nm with near diffraction-limited divergence and near transform-limited bandwidth. The system consists of one or more flashlamp-pumped Nd:glass zig-zag amplifiers, a very low threshold stimulated-Brillouin-scattering (SBS) phase conjugator system, and a free-running single frequency Nd:YLF master oscillator. Completely passive polarization switching provides eight amplifier gain passes. Multiple frequency output can be generated by using SBS cells having different pressures of a gaseous SBS medium or different SBS materials. This long pulse, low divergence, narrow-bandwidth, multi-frequency output laser system is ideally suited for use as an illuminator for long range speckle imaging applications. Because of its high average power and high beam quality, this system has application in any process which would benefit from a long pulse format, including material processing and medical applications.

  10. Long-pulse-width narrow-bandwidth solid state laser

    DOE Patents [OSTI]

    Dane, C.B.; Hackel, L.A.

    1997-11-18T23:59:59.000Z

    A long pulse laser system emits 500-1000 ns quasi-rectangular pulses at 527 nm with near diffraction-limited divergence and near transform-limited bandwidth. The system consists of one or more flashlamp-pumped Nd:glass zig-zag amplifiers, a very low threshold stimulated-Brillouin-scattering (SBS) phase conjugator system, and a free-running single frequency Nd:YLF master oscillator. Completely passive polarization switching provides eight amplifier gain passes. Multiple frequency output can be generated by using SBS cells having different pressures of a gaseous SBS medium or different SBS materials. This long pulse, low divergence, narrow-bandwidth, multi-frequency output laser system is ideally suited for use as an illuminator for long range speckle imaging applications. Because of its high average power and high beam quality, this system has application in any process which would benefit from a long pulse format, including material processing and medical applications. 5 figs.

  11. Noise induced narrowing of metamolecule fluorescence spectral line

    E-Print Network [OSTI]

    E. S. Andrianov; N. M. Chtchelkatchev; A. A. Pukhov

    2015-04-27T23:59:59.000Z

    We consider metamolecule consisting of bosonic mode correlated with the two-level system: it can be, for example, plasmonic mode interacting with the quantum dot or molecule in the resonator. We focus on the parameter range where all the correlations are strong and of the same order: interaction between bosonic mode correlated with the two-level system, external coherent drive and dissipation. Quantum Monte-Carlo simulations show a fluorescence of this system at dissipation larger than the driving amplitude and strong (by the order of magnitude) narrowing of its spectral line. This effect may be related to kind of a quantum stochastic resonance. We show that the fluorescence corresponds to finite domain over the coherent drive with sharp lower threshold and there is splitting of the Wigner function.

  12. Axionic superconductivity in three dimensional doped narrow gap semiconductors

    E-Print Network [OSTI]

    Pallab Goswami; Bitan Roy

    2014-08-07T23:59:59.000Z

    We consider the competition between the conventional s-wave and the triplet Balian-Werthamer or the B-phase pairings in the doped three dimensional narrow gap semiconductors, such as $\\mathrm{Cu}_x\\mathrm{Bi}_2\\mathrm{Se}_3$ and $\\mathrm{Sn}_{1-x}\\mathrm{In}_x\\mathrm{Te}$. When the coupling constants of the two contending channels are comparable, we find a simultaneously time-reversal and parity violating $p + is$ state at low temperatures, which provides an example of dynamic axionic state of matter. In contradistinction to the time-reversal invariant, topological B-phase, the $p + is$ state possesses gapped Majorana fermions as the surface Andreev bound states, which give rise to an anomalous surface thermal Hall effect. The anomalous gravitational and electrodynamic responses of the $p+is$ state can be described by the $\\theta$ vacuum structure, where $\\theta \

  13. Body of work

    SciTech Connect (OSTI)

    Carter, R.A.

    2008-06-15T23:59:59.000Z

    Selection of the right dump body for the job requires careful thinking, as is discussed in this paper. 2 figs.

  14. On The Nature of Low Luminosity Narrow Line AGN

    E-Print Network [OSTI]

    Ari Laor

    2003-02-26T23:59:59.000Z

    There is clear observational evidence that some narrow line (type 2) AGN have a hidden broad line region (BLR), and are thus intrinsically broad line (type 1) AGN. Does this AGN unification applies for all type 2 AGN? Indirect arguments suggest that some "true" type 2 AGN, i.e. AGN having no obscured BLR do exist, but it is not clear why the BLR is missing in these AGN. Here we point out a possible natural explanation. The observed radius-luminosity relation for the BLR implies an increasing line width with decreasing luminosity for a given black hole mass (Mbh). In addition, there appears to be an upper limit to the observed width of broad emission lines in AGN of Delta v_max~25,000 km/s, which may reflect a physical limit above which the BLR may not be able to survive. Thus, at a low enough luminosity the BLR radius shrinks below the Delta v_max radius, leaving no region where the BLR can exist, although the AGN may remain otherwise `normal'. The implied minimum bolometric luminosity required to sustain a BLR with Delta v<25,000 km/s is L_min~10^{41.8}(Mbh}/10^8M_sun)^2. All AGN with Lnarrow line AGN without a hidden BLR. Predictions for the true nature of low luminosity AGN in two samples of nearby galaxies are provided. These can be used to test the above L_min conjecture, and the predictions of other models for the size and origin of the BLR.

  15. A review of extended-range operations by transport aircraft

    E-Print Network [OSTI]

    Simpson, R. W.

    1987-01-01T23:59:59.000Z

    Introduction: The safety of enroute operations of aircraft engaged in public transport has been a continuous concern since the early days of air transportation. There are a variety of inflight emergency situations which ...

  16. aircraft fuels: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for ... Mody, Pritesh (Pritesh Chetan) 2010-01-01 9 2006-01-3092 Test Results for a Fuel Cell-Powered Demonstration Aircraft Copyright 2006 SAE International CiteSeer...

  17. M28 Fixed wing transport aircraft cost reduction

    E-Print Network [OSTI]

    Xia, YuXin, M.B.A. Sloan School of Management

    2011-01-01T23:59:59.000Z

    The M28 is a Polish short-takeoff-and-landing (STOL) light cargo aircraft developed in 1984 and currently built by PZL Mielec, a subsidiary of United Technology Corporation (UTC). There has been renewed interest in the ...

  18. aircraft ab prib: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the magnetic field of its plasma cable. For creating this plasma cable the AB-Space Engine spends only some kg of hydrogen. Alexander Bolonkin 2008-03-02 9 Aircraft...

  19. Six Degree of Freedom Morphing Aircraft Dynamical Model with Aerodynamics

    E-Print Network [OSTI]

    Niksch, Adam

    2010-01-14T23:59:59.000Z

    Morphing aircraft are envisioned to have multirole capability where the ability to change shape allows for adaptation to a changing mission environment. In order to calculate the properties of many wing configurations efficiently and rapidly, a...

  20. Value-based multidisciplinary optimization for commercial aircraft program design

    E-Print Network [OSTI]

    Peoples, Ryan E

    2004-01-01T23:59:59.000Z

    Traditional commercial aircraft design attempts to achieve improved performance and reduced operating costs by minimizing maximum takeoff weight, but this approach (does not guarantee the financial viability of the program ...

  1. Improving commonality implementation in the cockpits of commercial aircraft

    E-Print Network [OSTI]

    Bador, Damien (Damien Pierre Marcellin Dominique)

    2007-01-01T23:59:59.000Z

    Product development is a major source of competitive advantage in the commercial aircraft business. Judiciously implementing commonality across a range of products yields important benefits in this area. Thus, measuring ...

  2. Development of a high power density motor for aircraft propulsion

    E-Print Network [OSTI]

    Dibua, Imoukhuede Tim Odion

    2007-04-25T23:59:59.000Z

    are currently powered by heavy gas turbine engines that require fueling. The development of electric motors to replace gas turbines would be a big step towards accomplishing more efficient aircraft propulsion. The primary objective of this research extends...

  3. Intelligent weather agent for aircraft severe weather avoidance

    E-Print Network [OSTI]

    Bokadia, Sangeeta

    2002-01-01T23:59:59.000Z

    Severe weather conditions pose a large threat to the safety of aircraft, since they are responsible for a large percentage of aviation related accidents. With the advent of the free flight environment, the exigency for an autonomous severe weather...

  4. CHARBEL FARHAT Vivian Church Hoff Professor of Aircraft Structures

    E-Print Network [OSTI]

    Farhat, Charbel

    of Aeronautics and Astronautics Director, Army High Performance Computing Research Center Professor, Department-Driven Systems, Finite Element Approximation, Fluid-Structure Interaction, High Performance Computing, Implosion of Aircraft Structures, Stanford University 2007- Director, Army High Performance Computing Research Center

  5. aircraft braking system: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is to develop a thermoelastic Haviland, David 174 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  6. aircraft design: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    samples per flight Collett Jr., Jeffrey L. 60 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  7. aircraft system uas: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    D. Kekez; D. Klabucar; M. D. Scadron 2000-03-23 149 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  8. aircraft spacing system: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    An example of a basis Katznelson, Yitzhak 146 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  9. aircraft transportation system: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    737-800 commercial transport aircraft) Boeing,2 Lockheed-Martin,3 Northrop-Grumman,4 Raytheon,5 and BAE Systems6 all include some version de Weck, Olivier L. 167 Transport...

  10. aircraft hydraulic systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    RHHMS... Huff, William Edward 1988- 2012-12-05 135 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  11. Electrical Generation for More-Electric Aircraft using Solid...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    DE-AC05-76RL01830 Electrical Generation for More-Electric Aircraft using Solid Oxide Fuel Cells GA Whyatt LA Chick April 2012 PNNL-XXXXX Electrical Generation for More- Electric...

  12. Remote sensing of terrestrial tropospheric aerosols from aircraft and satellites

    E-Print Network [OSTI]

    Remote sensing of terrestrial tropospheric aerosols from aircraft and satellites M I Mishchenko1 instruments suitable for aerosol remote sensing and give examples of aerosol retrievals obtained forcing directly by absorbing and reflecting sunlight, thereby cooling or heating the atmosphere

  13. aircraft interior noise: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 OPTIMIZATION OF OPERATIONAL AIRCRAFT PARAMETERS REDUCING NOISE EMISSION Mathematics Websites...

  14. aircraft engine performance: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JET-A Fuel University of Kansas - KU ScholarWorks Summary: NOx, CO, CO2, and HC. The emission investigation demonstrates that the aircraft turbo diesel emission data (gkg fuel)...

  15. Property Rights, Progress, and the Aircraft Patent Agreement

    E-Print Network [OSTI]

    Bittlingmayer, George

    1988-04-01T23:59:59.000Z

    315 62 23 1969 338 55 19 1970 291 69 24 1971 336 61 29 1972 268 56 26 Total 1,548 303 121 SOURCE.Manufacturers Aircraft Association, Documents on file at the Department of Justice, Licensed Airline Patents, Exhibit B; and U . S . Patent... and Trademark Office, Classification Definitions, Class 244Aeronautics (February 1975), passim; Manufacturers Aircraft Association, documents on file at the Department of Justice, Licensed Airline Patents, Exhibit B; and U . S . Patent and Trademark Office...

  16. Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization

    DOE Patents [OSTI]

    Jankowiak, R.J.; Small, G.J.; Shields, P.A.

    1999-04-27T23:59:59.000Z

    Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes. 21 figs.

  17. Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization

    DOE Patents [OSTI]

    Jankowiak, Ryszard J. (Ames, IA); Small, Gerald J. (Ames, IA); Shields, Peter A. (Reading, MA)

    1999-04-27T23:59:59.000Z

    Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes.

  18. Narrow Feshbach Bound State of an Ultracold Atom Pair with an Extrapolation to a Many Body Phase

    E-Print Network [OSTI]

    Lopez, Nicolas

    2013-01-01T23:59:59.000Z

    Kinetic Energy Operator General Expression for KineticOperator General Expression for Kinetic Energy Given thecan find an expression for the average kinetic energy. = ?

  19. Experimental investigations on sodium plugging in narrow flow channels.

    SciTech Connect (OSTI)

    Momozaki, Y.; Cho, D. H.; Sienicki, J. J.; Moisseytsev, A.; Nuclear Engineering Division

    2010-08-01T23:59:59.000Z

    A series of experiments was performed to investigate the potential for plugging of narrow flow channels of sodium by impurities (e.g., oxides). In the first phase of the experiments, clean sodium was circulated through the test sections simulating flow channels in a compact diffusion-bonded heat exchanger such as a printed circuit heat exchanger. The primary objective was to see if small channels whose cross sections are semicircles of 2, 4, and 6 mm in diameter are usable in liquid sodium applications where sodium purity is carefully controlled. It was concluded that the 2-mm channels, the smallest of the three, could be used in clean sodium systems at temperatures even as low as 100 to 110 C without plugging. In the second phase, sodium oxide was added to the loop, and the oxygen concentration in the liquid sodium was controlled by means of varying the cold-trap temperature. Intentional plugging was induced by creating a cold spot in the test sections, and the subsequent plugging behavior was observed. It was found that plugging in the 2-mm test section was initiated by lowering the cold spot temperature below the cold-trap temperature by 10 to 30 C. Unplugging of the plugged channels was accomplished by heating the affected test section.

  20. Radio-loud Narrow-Line Type 1 Quasars

    E-Print Network [OSTI]

    S. Komossa; W. Voges; D. Xu; S. Mathur; H. -M. Adorf; G. Lemson; W. Duschl; D. Grupe

    2006-03-24T23:59:59.000Z

    We present the first systematic study of (non-radio-selected) radio-loud narrow-line Seyfert 1 (NLS1) galaxies. Cross-correlation of the `Catalogue of Quasars and Active Nuclei' with several radio and optical catalogues led to the identification of 11 radio-loud NLS1 candidates including 4 previously known ones. Most of the radio-loud NLS1s are compact, steep spectrum sources accreting close to, or above, the Eddington limit. The radio-loud NLS1s of our sample are remarkable in that they occupy a previously rarely populated regime in NLS1 multi-wavelength parameter space. While their [OIII]/H_beta and FeII/H_beta intensity ratios almost cover the whole range observed in NLS1 galaxies, their radio properties extend the range of radio-loud objects to those with small widths of the broad Balmer lines. Among the radio-detected NLS1 galaxies, the radio index R distributes quite smoothly up to the critical value of R ~ 10 and covers about 4 orders of magnitude in total. Statistics show that ~7% of the NLS1 galaxies are formally radio-loud while only 2.5% exceed a radio index R > 100. Several mechanisms are considered as explanations for the radio loudness of the NLS1 galaxies and for the lower frequency of radio-louds among NLS1s than quasars. While properties of most sources (with 2-3 exceptions) generally do not favor relativistic beaming, the combination of accretion mode and spin may explain the observations. (abbreviated)

  1. Fitting Narrow Emission Lines in X-ray Spectra Taeyoung Park

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    Fitting Narrow Emission Lines in X-ray Spectra Taeyoung Park Department of Statistics, Harvard University October 25, 2005 Taeyoung Park Fitting Narrow Emission Lines in X X-ray luminosity, and the emission of photons with energies is represented by a spectrum

  2. Slow electromagnetic pulse propagation through a narrow transmission band in a coaxial photonic crystal

    E-Print Network [OSTI]

    Robertson, William

    Slow electromagnetic pulse propagation through a narrow transmission band in a coaxial photonic the slow group-velocity propagation of electromagnetic pulses through a narrow transmission band describe a simple experimental configuration that leads to slow-group-velocity electromagnetic pulse

  3. Porous body infiltrating method

    DOE Patents [OSTI]

    Corman, Gregory Scot (Ballston Lake, NY)

    2002-01-01T23:59:59.000Z

    A mixture is formed that comprises at least some to about 10 wt % boron nitride and silicon. A body comprising a component that is wetted by or reacts with silicon is contacted with the mixture and the contacted body is infiltrated with silicon from the mixture.

  4. Modeling of particulate matter creation and evolution in aircraft engines, plumes and particle sampling systems

    E-Print Network [OSTI]

    Dakhel, Pierre Max

    2005-01-01T23:59:59.000Z

    Environmental and health concerns have recently led to growing efforts to characterize the exhaust gas composition of aircraft engines. Besides major chemical species (N?, 0?, C0? and H?0), aircraft engines also emit other ...

  5. The impact of aircraft design reference mission on fuel efficiency in the air transportation system

    E-Print Network [OSTI]

    Yutko, Brian M. (Brian Matthew)

    2014-01-01T23:59:59.000Z

    Existing commercial aircraft are designed for high mission flexibility, which results in decreased fuel efficiency throughout the operational life of an aircraft. The objective of this research is to quantify the impact ...

  6. 16.885J / ESD.35J Aircraft Systems Engineering, Fall 2003

    E-Print Network [OSTI]

    Hansman, Robert John

    Subject addresses a holistic systems engineering approach for aircraft development. Focuses on the conceptual phase of product definition during which all aspects relevant to a new or derivative aircraft must be considered. ...

  7. Interactive dynamic aircraft scheduling and fleet routing with the out-of-kilter algorithm

    E-Print Network [OSTI]

    Van Cotthem, Jan

    1986-01-01T23:59:59.000Z

    A decision support system is introduced that automates dynamic aircraft scheduling and fleet routing. Interactive graphics-based schedule construction and modification tools automate the dynamic scheduling of aircraft of ...

  8. Decentralized aircraft landing scheduling at single runway non-controlled airports

    E-Print Network [OSTI]

    Ding, Yuanyuan

    2009-05-15T23:59:59.000Z

    that achieves decentralized aircraft landing scheduling with acceptable performance whereas a solution to the distributed coordination issues is presented. Finally real-time Monte Carlo flight simulations of multi-aircraft landing scenarios are conducted...

  9. The MQ-9 Reaper remotely piloted aircraft : humans and machines in action

    E-Print Network [OSTI]

    Cullen, Timothy M

    2011-01-01T23:59:59.000Z

    Remotely piloted aircraft and the people that control them are changing how the US military operates aircraft and those who fly, yet few know what "drone" operators actually do, why they do what they do, or how they shape ...

  10. he U.S. Coast Guard expects all of its Sikorsky Aircraft MH-60T

    E-Print Network [OSTI]

    Almor, Amit

    to have an Aircraft Diagnostic Vibration Management System (ADVMS) installed by 2018. It chose Honeywell also save Vol. 59, No. 3 1 The U.S.Coast Guard selected Honeywell late last year to supply the Aircraft

  11. Development of an aerodynamic/RCS framework for the preliminary design of a hypersonic aircraft

    E-Print Network [OSTI]

    Dicara, Daniel L

    2006-01-01T23:59:59.000Z

    The design of hypersonic airbreathing aircraft pushes the envelope of current state-ofthe-art aerospace propulsion and materials technology. Therefore, these aircraft are highly integrated to produce adequate thrust, reduce ...

  12. Stress Corrosion Crack Detection on HU-25 Guardian Aircraft

    SciTech Connect (OSTI)

    Blackmon, R.; Huffman, J.; Mello, C.W.; Moore, D.G.; Walkington, P.D.

    1999-02-17T23:59:59.000Z

    Several ultrasonic inspection methods were developed at the Federal Aviation Administration's Airworthiness Assurance NDI Validation Center (AANC) to easily and rapidly detect hidden stress corrosion cracks in all vertical windshield posts on the US Coast Guard (USCG) HU-25 Guardian aircraft. The inspection procedure locates cracks as small as 2.0 millimeters emanating from internal fastener holes and determines their length. A test procedure was developed and a baseline assessment of the USCG fleet was conducted. Inspection results on twenty-five aircraft revealed a good correlation with results made during subsequent structural disassembly and visual inspection.

  13. DOD-DOE Workshop Aircraft Petroleum Use Reduction: Can Fuel Cells be a Game Changer?

    E-Print Network [OSTI]

    Materials Provided DOD-DOE MOU NASA/UTC SOFC APU Feasibility Study for Long Range Commercial Aircraft 9

  14. Temperature of aircraft cargo flame exposure during accidents involving fuel spills

    SciTech Connect (OSTI)

    Mansfield, J.A.

    1993-01-01T23:59:59.000Z

    This report describes an evaluation of flame exposure temperatures of weapons contained in alert (parked) bombers due to accidents that involve aircraft fuel fires. The evaluation includes two types of accident, collisions into an alert aircraft by an aircraft that is on landing or take-off, and engine start accidents. Both the B-1B and B-52 alert aircraft are included in the evaluation.

  15. Body powered thermoelectric systems

    E-Print Network [OSTI]

    Settaluri, Krishna Tej

    2012-01-01T23:59:59.000Z

    Great interest exists for and progress has be made in the effective utilization of the human body as a possible power supply in hopes of powering such applications as sensors and continuously monitoring medical devices ...

  16. Method for Weight Control Engineering Management to Evaluate Single Engine Aircraft Weighing Activities

    E-Print Network [OSTI]

    Brown, Patrick M.

    2007-05-18T23:59:59.000Z

    Nose Gear Weight Plot................................................................................................. 51 Figure 31 Measurement of Distance ?A? Plot............................................................................... 51... measurement of everything from the thickness of a coat of paint to how much an aircraft weighs and where its CG is located. 1 The problem of determining an aircraft?s weight and CG is the focus of this investigation. It is a primary concern for Weight...

  17. Statistical prediction of aircraft trajectory: regression methods vs point-mass model

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    the altitude of climbing aircraft. In addition to the standard linear regression model, two common non-linear, BADA, linear regression, neural networks, Loess. INTRODUCTION Predicting aircraft trajectoriesStatistical prediction of aircraft trajectory: regression methods vs point-mass model M. Ghasemi

  18. Use of Eye Movements as Feedforward Training for a Synthetic Aircraft Inspection Task

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    - spection and maintenance are vital in assuring safety of an aircraft. The two main types of aircraft Sadasivan, Joel S. Greenstein, Anand K. Gramopadhye Industrial Engineering Clemson University, Clemson, SC, Clemson, SC 29634 duchowski@acm.org ABSTRACT Aircraft inspection is a vital element in assuring safety

  19. Remote Sensing of Commercial Aircraft Emissions Peter J. Popp & Donald H. Stedman

    E-Print Network [OSTI]

    Denver, University of

    Remote Sensing of Commercial Aircraft Emissions Peter J. Popp & Donald H. Stedman Department;Remote Sensing of Commercial Aircraft Emissions 2 Introduction On September 23 and 24, 1997, a study Authority, to remotely measure the emissions of commercial aircraft. During the two day sampling period

  20. Fault detection and isolation in aircraft gas turbine engines. Part 1: underlying concept

    E-Print Network [OSTI]

    Ray, Asok

    307 Fault detection and isolation in aircraft gas turbine engines. Part 1: underlying concept: aircraft propulsion, gas turbine engines, fault detection and isolation, statistical pattern recognition 1 INTRODUCTION Performance and reliability of aircraft gas turbine engines gradually deteriorate over the service

  1. Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gromann1

    E-Print Network [OSTI]

    Jüttler, Bert

    Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gro?mann1 , Bert Jüttler2, in the challenging field of aircraft engines. We study the deformation of turbine blades under the assumption, manufacturing and repairing turbine engines for aircrafts. A challenging task in this field is the efficient

  2. Aircraft Accident Prevention: Loss-of-Control Analysis Harry G. Kwatny

    E-Print Network [OSTI]

    Kwatny, Harry G.

    Aircraft Accident Prevention: Loss-of-Control Analysis Harry G. Kwatny , Jean-Etienne T. Dongmo NASA Langley Research Center, MS 161, Hampton, VA, 23681. The majority of fatal aircraft accidents that during the ten year period 1997-2006, 59% of fatal aircraft accidents were associated with Loss

  3. Environmental assessment, aircraft chemical warfare survivability test program, Naval Air Warfare Center, Aircraft Division, Patuxent River, Maryland

    SciTech Connect (OSTI)

    NONE

    1992-02-01T23:59:59.000Z

    The proposed project, the Aircraft Chemical Warfare Survivability Test Program at Patuxent River Naval Air Station, involves the testing and development of aircraft systems and operating procedures for use in an environment contaminated with chemical/biological warfare agents. The tests will be performed in accordance with a directive from the chief of Naval Operations to obtain and maintain the capability to operate in a chemically-contaminated environment. These tests will be performed under outdoor, warm-weather conditions on a dredge disposal area and adjacent runways to simulate the conditions under which a real-life threat would be encountered.

  4. Narrow stripe AlGaAs lasers using double current confinement

    SciTech Connect (OSTI)

    Blauvelt, H.; Margalit, S.; Yariv, A.

    1982-11-15T23:59:59.000Z

    Gain guided AlGaAs lasers in which the current is restricted to flow between two narrow stripes have been fabricated. The double current confinement configuration, which is fabricated by a selective meltback-growth technique, enables the current injection to be restricted to a very narrow section of the active layer. These lasers exhibit very strong antiguiding and operate in many longitudinal modes, which are characteristics of narrow stripe lasers. Potential applications of the twin vertical stripe configuration include arrays of optically coupled lasers and, if a real index waveguiding mechanism can be combined with double current confinement, low threshold lasers.

  5. Further Evidence of Narrow Baryonic Structures with Hadronic as Well as Leptonic Probes

    E-Print Network [OSTI]

    B. Tatischeff; E. Tomasi-Gustafsson

    2004-11-22T23:59:59.000Z

    Although extracted from several experiments using hadronic probes \\cite{bor1}, narrow baryonic structures have been sometimes met with disbelief. New signatures are presented, which appear from already published data, obtained with hadronic probes as well as with leptonic probes. The authors of these results did not take into account the possibility to associate the discontinuities of their spectra with the topic of narrow baryonic low mass structures. The stability of the observed narrow structure masses, represents a confirmation of their genuine existence.

  6. A narrow-band speckle-free light source via random Raman lasing

    E-Print Network [OSTI]

    Hokr, Brett H; Bixler, Joel N; Dyer, Phillip N; Noojin, Gary D; Redding, Brandon; Thomas, Robert J; Rockwell, Benjamin A; Cao, Hui; Yakovlev, Vladislav V; Scully, Marlan O

    2015-01-01T23:59:59.000Z

    Currently, no light source exists which is both narrow-band and speckle-free with sufficient brightness for full-field imaging applications. Light emitting diodes (LEDs) are excellent spatially incoherent sources, but are tens of nanometers broad. Lasers on the other hand can produce very narrow-band light, but suffer from high spatial coherence which leads to speckle patterns which distort the image. Here we propose the use of random Raman laser emission as a new kind of light source capable of providing short-pulsed narrow-band speckle-free illumination for imaging applications.

  7. Alteration And Geochemical Zoning In Bodie Bluff, Bodie Mining...

    Open Energy Info (EERE)

    Alteration And Geochemical Zoning In Bodie Bluff, Bodie Mining District, Eastern California Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article:...

  8. advanced technology aircraft: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    technology aircraft First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 February 2000 Advanced Technology...

  9. aircraft impact dynamics: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    impact dynamics First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Conceptual aircraft dynamics from...

  10. aircraft energy efficiency: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft energy efficiency First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Design Drivers of...

  11. On Optimization of Sensor Selection for Aircraft Gas

    E-Print Network [OSTI]

    Simon, Dan

    1 On Optimization of Sensor Selection for Aircraft Gas Turbine Engines Ramgopal Mushini Dan Simon temperature 6. HPC exit temperature 7. Bypass duct pressure 8. HPC exit pressure 9. LPT (low pressure turbine. High pressure turbine airflow capacity 6. High pressure turbine efficiency 7. Low pressure turbine

  12. aircraft shield test reactor: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft shield test reactor First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Experimental Tests of...

  13. aircraft materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Material Delivery System for...

  14. aircraft interior materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft interior materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Standard Test Method to...

  15. Predicting the Operational Effectiveness of Aircraft Survivability Equipment Suite

    E-Print Network [OSTI]

    Noh, Sanguk

    , and experiment with their autonomous decision-making against threats in various electronic warfare settings. We: Autonomous Decision-Making, Electronic Warfare Settings, Aircraft Survivability Equipment Suite, Operational Effectiveness 1. Introduction In order to counter threats in electronic warfare environments, a command

  16. 50 years of transonic aircraft design Antony Jameson, Kui Ou

    E-Print Network [OSTI]

    Jameson, Antony

    optimization (MDO). They have also transformed aircraft operations through the adoption of digital fly been completely transformed by the introduction of sophisticated numerical algorithms and an astonishing increase in the available computational power, with the consequence that aerodynamic design is now

  17. An object-oriented, knowledge-based aircraft approach controller

    E-Print Network [OSTI]

    Lass, Steven Lee

    1995-01-01T23:59:59.000Z

    The research for the thesis was performed by Steven Lee Lass in pursuit of a Master of Science degree in Electrical Engineering. The objective of this research was to develop an approach system for an aircraft using fuzzy control. The approach...

  18. aircraft composite materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft composite materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Material Delivery System...

  19. aircraft accident victims: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft accident victims First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Cyclistes Victimes d'Accident...

  20. aircraft air pollution: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aircraft air pollution First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Environmental Pollution Air...

  1. Electrochemical Waves on Patterned Surfaces: Propagation through Narrow Gaps and Konstantin Agladze, Stephanie Thouvenel-Romans, and Oliver Steinbock*

    E-Print Network [OSTI]

    Steinbock, Oliver

    Electrochemical Waves on Patterned Surfaces: Propagation through Narrow Gaps and Channels propagation through narrow gaps and long channels. In channels, the wave velocity decreases with decreasing dynamically similar phenomena such as propagating fronts, target patterns, and rotating spiral waves. Pattern

  2. Widening Access and Narrowing Focus: Could the Internet Balkanize Science? Marshall Van Alstyne and Erik Brynjolfsson

    E-Print Network [OSTI]

    Widening Access and Narrowing Focus: Could the Internet Balkanize Science? Marshall Van Alstyne. Figure 1.A Figure 1.B Electronic Balkanization Yet, if IT helps an algebraic topologist in North America

  3. Fitting Narrow Spectral Lines in High Energy Astrophysics Using Incompatible Gibbs Samplers

    E-Print Network [OSTI]

    van Dyk, David

    for the data degradation processes (van Dyk et al., 2001). Efficient X-ray Spectral Fitting Hierarchical' & $ % Fitting Narrow Spectral Lines in High Energy Astrophysics Using Incompatible Gibbs Samplers Siemiginowska (Harvard-Smithsonian Center for Astrophysics, USA, aneta

  4. Water-Soluble Narrow-Line Radicals for Dynamic Nuclear Polarization

    E-Print Network [OSTI]

    Haze, Olesya

    The synthesis of air-stable, highly water-soluble organic radicals containing a 1,3-bis(diphenylene)-2-phenylallyl (BDPA) core is reported. A sulfonated derivative, SA-BDPA, retains the narrow electron paramagnetic resonance ...

  5. Narrow-Band Absorption-Enhanced Quantum Dot/J-Aggregate Conjugates

    E-Print Network [OSTI]

    Walker, Brian J.

    We report narrow-band absorption enhancement of semiconductor nanocrystals via Frster resonance energy transfer from cyanine J-aggregates. These J-aggregated dyes associate electrostatically with short quantum-dot (QD) ...

  6. Fault detection and isolation in aircraft gas turbine engines. Part 2: validation on a simulation test bed

    E-Print Network [OSTI]

    Ray, Asok

    319 Fault detection and isolation in aircraft gas turbine engines. Part 2: validation of fault detection and isolation (FDI) in aircraft gas turbine engines. The FDI algorithms are built upon,onasimulationtestbed.Thetestbedisbuiltuponanintegratedmodelofageneric two-spool turbofan aircraft gas turbine engine including the engine control system. Keywords: aircraft

  7. Porous metallic bodies

    DOE Patents [OSTI]

    Landingham, R.L.

    1984-03-13T23:59:59.000Z

    Porous metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides a

  8. Performance deterioration modeling in aircraft gas turbine engines

    SciTech Connect (OSTI)

    Zaita, A.V. [Advanced Engineering and Research Associates, Inc., Arlington, VA (United States). Technology Development Div.; Buley, G. [Naval Surface Warfare Center, West Bethesda, MD (United States). Carderock Div.; Karlsons, G. [Naval Air Warfare Center, Patuxent River, MD (United States)

    1998-04-01T23:59:59.000Z

    Steady-state performance models can be used to evaluate a new engine`s baseline performance. As a gas turbine accumulates operating time in the field, its performance deteriorates due to fouling, erosion, and wear. This paper presents the development of a model for predicting the performance deterioration of aircraft gas turbines. The model accounts for rotating component deterioration based on the aircraft mission profiles and environmental conditions and the engine`s physical and design characteristics. The methodology uses data correlations combined with a stage stacking technique for the compressor and a tip rub model, along with data correlations for the turbine to determine the amount of performance deterioration. The performance deterioration model interfaces with the manufacturer`s baseline engine simulation model in order to create a deteriorated performance model for that engine.

  9. Low-voltage radiography on aircraft composite doublers

    SciTech Connect (OSTI)

    Moore, D.G.; Murray, J.D.

    1997-11-01T23:59:59.000Z

    Composite doublers are gaining popularity for their ability to repair and reinforce commercial aircraft structures and it is anticipated that the potential cost savings may spur wider use of this technology. But before composite doublers can be accepted by the civil aviation industry, inspection techniques must be developed to verify the integrity of the doubler and the parent material under the doubler. The Federal Aviation Administration Airworthiness Assurance NDI Validation Center (AANC) is currently developing test methods to inspect aircraft structures under composite doublers using low kilovoltage radiography. This paper documents the radiographic techniques developed by the AANC which have been found to give the best contrast of the radiographic image with reduced image distortion.

  10. Consideration of the environmental impact of aircraft has become critical in commercial aviation. The continued growth of air traffic has caused increasing demands to reduce aircraft emissions,

    E-Print Network [OSTI]

    Papalambros, Panos

    ABSTRACT Consideration of the environmental impact of aircraft has become critical in commercial. Demands by the public, environ- mentalists, and governments to reduce aircraft environmental impact, have technologies can reduce the environmental impact of air travel per passenger-mile flown. However, with current

  11. Activities at the FAA aging aircraft NDI validation center

    SciTech Connect (OSTI)

    Shurtleff, W.

    1994-08-01T23:59:59.000Z

    Aging Aircraft NDI Validation Center (AANC) was established by the FAA Technical Center (FAATC) at Sandia National Laboratories in August of 1991. The Validation Center supports the inspection portion of the FAA`s National Aging Aircraft Program which was mandated by Congress in the 1988 Aviation Safety Act. The ultimate customers of the AANC include the FAA, airframe and engine manufacturers, airlines, and third party maintenance facilities. One goal of the AANC is to provide independent validation of technologies intended to enhance the structural inspection of aging commuter and transport aircraft. Another goal is to assist in transferring emerging inspection technology from other parts of the FAA`s program to the aircraft industry. The deliverables from both these activities are an assessment of the reliability and cost benefits of an inspection technology as applied to a particular inspection or class of inspections. The validation process consists of a quantitative and systematic assessment of the reliability and cost/benefits on a Nondestructive Inspection (NDI) process. A NDI process is defined as the NDI systems and procedures used for inspections. This includes the NDI operator, inspection environment, and the object being inspected. The phases of the validation process are: 1. Conceptual, 2. Preliminary design, 3. Final design, and 4. Field implementation. The AAANC usually gets involved in the validation process during Phases 2 and 3. The Center supports field trials with a full array of test specimens and established procedures for conducting the trials. Phase 4 reliability includes field trials using independent inspectors either at the Center`s hangar or at outside maintenance facilities. Three activities are summarized below where inspection technology has been validated in the field. These are: (1) eddy current inspection reliability experiment; (2) magneto optic imager validation; and (3) inspection tool improvement.

  12. Taxiway Aircraft Traffic Scheduling: A Model and Solution Algorithms

    E-Print Network [OSTI]

    Tian, Chunyu

    2012-10-19T23:59:59.000Z

    -known of these policies are the Ground Delay Progr am and Collaborative Decision Making (CDM). 15 The Ground Delay Program is currently implemented by the Federal Aviation Administration (FAA) to control air traffic when the acceptance rate of the destination... directions, they are referred as intersecting runways. In runway operations, the most important factors that need to be considered include wake vortex separations. Federal Aviation Administration categorizes the aircraft into three classes according...

  13. Low gloss UV-cured coatings for aircraft

    DOE Patents [OSTI]

    Bowman, Mark; Muschar, Harry

    2014-12-09T23:59:59.000Z

    A method of applying a low gloss coating to a substrate such as the exterior surface of an aircraft is disclosed. The coating composition comprising a polyene, a polythiol, a flatting agent and a coloring pigment is applied to the substrate and given a first dosage of UV radiation followed by a second dosage in which the second dosage is greater than the first resulting in an ultralow gloss coating.

  14. Nondestructive inspection of bonded composite doublers for aircraft

    SciTech Connect (OSTI)

    Roach, D.; Moore, D.; Walkington, P.

    1996-12-31T23:59:59.000Z

    One major thrust in FAA`s National Aging Aircraft Research Program is to foster new technologies in civil aircraft maintenance. Recent DOD and other government developments in using bonded composite doublers on metal structures support the need for validation of such doubler applications on US certificated airplanes. In this study, a specific composite application was chosen on an L-1011 aircraft. Primary inspection requirements for these doublers include identifying disbonds between composite laminate and aluminum parent material, and delaminations in the composite laminate. Surveillance of cracks or corrosion in the parent aluminum material beneath the double is also a concern. No single NDI method can inspect for every flaw type, therefore we need to know NDI capabilities and limitations. This paper reports on a series of NDI tests conducted on laboratory test structures and on a fuselage section from a retired L-1011. Application of ultrasonics, x-ray, and eddy current to composite doublers and results from test specimens loaded to provide a changing flaw profile, are presented in this paper. Development of appropriate inspection calibration standards are also discussed.

  15. A user`s guide to LUGSAN II. A computer program to calculate and archive lug and sway brace loads for aircraft-carried stores

    SciTech Connect (OSTI)

    Dunn, W.N. [Sandia National Labs., Albuquerque, NM (United States). Mechanical and Thermal Environments Dept.

    1998-03-01T23:59:59.000Z

    LUG and Sway brace ANalysis (LUGSAN) II is an analysis and database computer program that is designed to calculate store lug and sway brace loads for aircraft captive carriage. LUGSAN II combines the rigid body dynamics code, SWAY85, with a Macintosh Hypercard database to function both as an analysis and archival system. This report describes the LUGSAN II application program, which operates on the Macintosh System (Hypercard 2.2 or later) and includes function descriptions, layout examples, and sample sessions. Although this report is primarily a user`s manual, a brief overview of the LUGSAN II computer code is included with suggested resources for programmers.

  16. A user`s guide to LUGSAN 1.1: A computer program to calculate and archive lug and sway brace loads for aircraft-carried stores

    SciTech Connect (OSTI)

    Dunn, W.N. [Sandia National Labs., Albuquerque, NM (United States). Experimental Structural Dynamics Dept.

    1994-07-01T23:59:59.000Z

    LUGSAN (LUG and Sway brace ANalysis) is a analysis and database computer program designed to calculate store lug and sway brace loads from aircraft captive carriage. LUGSAN combines the rigid body dynamics code, SWAY85 and the maneuver calculation code, MILGEN, with an INGRES database to function both as an analysis and archival system. This report describes the operation of the LUGSAN application program, including function description, layout examples, and sample sessions. This report is intended to be a user`s manual for version 1.1 of LUGSAN operating on the VAX/VMS system. The report is not intended to be a programmer or developer`s manual.

  17. Few-body Physics in a Many-body World

    E-Print Network [OSTI]

    N. T. Zinner

    2014-07-29T23:59:59.000Z

    The study of quantum mechanical few-body systems is a century old pursuit relevant to countless subfields of physics. While the two-body problem is generally considered to be well-understood theoretically and numerically, venturing to three or more bodies brings about complications but also a host of interesting phenomena. In recent years, the cooling and trapping of atoms and molecules has shown great promise to provide a highly controllable environment to study few-body physics. However, as is true for many systems where few-body effects play an important role the few-body states are not isolated from their many-body environment. An interesting question then becomes if or (more precisely) when we should consider few-body states as effectively isolated and when we have to take the coupling to the environment into account. Using some simple, yet non-trivial, examples I will try to suggest possible approaches to this line of research.

  18. Male body image: testosterone's response to body comparisons

    E-Print Network [OSTI]

    Brown, Joshua D.

    2006-08-16T23:59:59.000Z

    Although there have been only a few etiological studies that have examined the development and maintenance of body image in males, research fairly consistently reports that exposure and presumed comparison to images of ideal male bodies increases...

  19. Evidence for Narrow N*(1685) Resonance in Quasifree Compton Scattering on the Neutron

    E-Print Network [OSTI]

    V. Kuznetsov; M. V. Polyakov; V. Bellini; T. Boiko; S. Chebotarev; H. S. Dho; G. Gervino; F. Ghio; A. Giusa; A. Kim; W. Kim; F. Mammoliti; E. Milman; A. Ni; I. A. Perevalova; C. Randieri; G. Russo; M. L. Sperduto; C. M. Sutera; A. N. Vall

    2011-02-21T23:59:59.000Z

    The first study of quasi-free Compton scattering on the neutron in the energy range of $E_{\\gamma}=0.75 - 1.5$ GeV is presented. The data reveals a narrow peak at $W\\sim 1.685$ GeV. This result, being considered in conjunction with the recent evidence for a narrow structure at $W\\sim 1.68$GeV in the $\\eta$ photoproduction on the neutron, suggests the existence of a new nucleon resonance with unusual properties: the mass $M\\sim 1.685$GeV, the narrow width $\\Gamma \\leq 30$MeV, and the much stronger photoexcitation on the neutron than on the proton.

  20. Optic for an endoscope/borescope having high resolution and narrow field of view

    DOE Patents [OSTI]

    Stone, Gary F.; Trebes, James E.

    2003-10-28T23:59:59.000Z

    An optic having optimized high spatial resolution, minimal nonlinear magnification distortion while at the same time having a limited chromatic focal shift or chromatic aberrations. The optic located at the distal end of an endoscopic inspection tool permits a high resolution, narrow field of view image for medical diagnostic applications, compared to conventional optics for endoscopic instruments which provide a wide field of view, low resolution image. The image coverage is over a narrow (<20 degrees) field of view with very low optical distortion (<5% pin cushion or barrel distortion. The optic is also optimized for best color correction as well as to aid medical diagnostics.

  1. Recipient luminophoric mediums having narrow spectrum luminescent materials and related semiconductor light emitting devices and methods

    DOE Patents [OSTI]

    LeToquin, Ronan P; Tong, Tao; Glass, Robert C

    2014-12-30T23:59:59.000Z

    Light emitting devices include a light emitting diode ("LED") and a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED. In some embodiments, the recipient luminophoric medium includes a first broad-spectrum luminescent material and a narrow-spectrum luminescent material. The broad-spectrum luminescent material may down-convert radiation emitted by the LED to radiation having a peak wavelength in the red color range. The narrow-spectrum luminescent material may also down-convert radiation emitted by the LED into the cyan, green or red color range.

  2. Experimental flight test vibration measurements and nondestructive inspection on a USCG HC-130H aircraft

    SciTech Connect (OSTI)

    Moore, D.G.; Jones, C.R. [Sandia National Labs., Albuquerque, NM (United States). FAA Airworthiness Assurance NDI Validation Center; Mihelic, J.E.; Barnes, J.D. [Coast Guard Aircraft Repair and Supply Center, Elizabeth City, NC (United States)

    1998-08-01T23:59:59.000Z

    This paper presents results of experimental flight test vibration measurements and structural inspections performed by the Federal Aviation Administration`s Airworthiness Assurance NDI Validation Center (AANC) at Sandia National Laboratories and the US Coast Guard Aircraft Repair and Supply Center (ARSC). Structural and aerodynamic changes induced by mounting a Forward Looking Infrared (FLIR) system on a USCG HC-130H aircraft are described. The FLIR adversely affected the air flow characteristics and structural vibration on the external skin of the aircraft`s right main wheel well fairing. Upon initial discovery of skin cracking and visual observation of skin vibration in flight by the FLIR, a baseline flight without the FLIR was conducted and compared to other measurements with the FLIR installed. Nondestructive inspection procedures were developed to detect cracks in the skin and supporting structural elements and document the initial structural condition of the aircraft. Inspection results and flight test vibration data revealed that the FLIR created higher than expected flight loading and was the possible source of the skin cracking. The Coast Guard performed significant structural repair and enhancement on this aircraft, and additional in-flight vibration measurements were collected on the strengthened area both with and without the FLIR installed. After three months of further operational FLIR usage, the new aircraft skin with the enhanced structural modification was reinspected and found to be free of flaws. Additional US Coast Guard HC-130H aircraft are now being similarly modified to accommodate this FLIR system. Measurements of in-flight vibration levels with and without the FLIR installed, and both before and after the structural enhancement and repair were conducted on the skin and supporting structure in the aircraft`s right main wheel fairing. Inspection results and techniques developed to verify the aircraft`s structural integrity are discussed.

  3. RADIATION SCIENCE AND TECHNOLOGY | ROTARY WING AIRCRAfT | SANITARY -ENVIRONMENTAL

    E-Print Network [OSTI]

    RADIATION SCIENCE AND TECHNOLOGY | ROTARY WING AIRCRAfT | SANITARY - ENVIRONMENTAL ENGINEERING Computational Genomics & Proteomics 2008 Wearable Intelligent Devices for Human Health and Protection 2009

  4. E-Print Network 3.0 - aircraft piston engine Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Melbourne Collection: Engineering 56 TUNNEL-IN-THE-SKY COCKPIT DISPLAY FOR COMPLEX REMOTE SENSING FLIGHT TRAJECTORIES* Summary: aircraft was also changed to a twin...

  5. E-Print Network 3.0 - aircraft exhaust gases Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of operations in a highly flexible and inexpensive mode... meteorological observations in remote and otherwise inaccessible regions. A proto- type aircraft was first flown......

  6. E-Print Network 3.0 - aircraft floor paneling Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Collection: Materials Science 13 NIST NCSTAR 1-5A, WTC Investigation 297 FIRE BEHAVIOR IN WORLD TRADE CENTER 2 Summary: of the aircraft's starboard wing. Other floors...

  7. DIAGNOSIS OF DYNAMITRON ACCELERATOR FAULTS THROUGH THE OBSERVATION OF NARROW NUCLEAR RESONANCES

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of a thermionic rectifier. The beam energy ripple, as reflected in the full width at half maximum of narrow (p,03B checks on the apparent DVM setting at the Li (p, n) threshod, for example, when converted to keV using t

  8. Measurement of Resonance Parameters of Orbitally Excited Narrow B-0 Mesons

    E-Print Network [OSTI]

    Xie, Si

    We report a measurement of resonance parameters of the orbitally excited (L=1) narrow B0 mesons in decays to B(*)+?- using 1.7??fb[superscript -1] of data collected by the CDF II detector at the Fermilab Tevatron. The mass ...

  9. Sowing Wind Science no sooner did the tacoma narrows bridge--the world's third

    E-Print Network [OSTI]

    Landweber, Laura

    i Sowing Wind Science no sooner did the tacoma narrows bridge--the world's third longest suspension in the wind. The pronounced heave, or more technically speaking the longitudinal undulation, caused some auto disappearing from sight as if traveling a hilly country road. by november 7, amid 39-mile-an-hour winds, the $6

  10. Finding Narrow Passages with Probabilistic Roadmaps: The Small Step Retraction Method

    E-Print Network [OSTI]

    Pratt, Vaughan

    Finding Narrow Passages with Probabilistic Roadmaps: The Small Step Retraction Method Mitul Saha, USA {mitul, latombe}@cs.stanford.edu Abstract - The efficiency of Probabilistic Roadmap (PRM) planners fattening the robot's free space, constructing a roadmap in the fattened free space, and repairing colliding

  11. Monte Carlo Simulation of Radiation in Gases with a NarrowBand Model

    E-Print Network [OSTI]

    Dufresne, Jean-Louis

    , France (\\Phi) now at the Institute of Energy and Power Plant Technology, TH Darmstadt, 64287 DarmstadtMonte Carlo Simulation of Radiation in Gases with a Narrow­Band Model and a Net is used for simulation of radiative heat transfers in non­gray gases. The proposed procedure is based

  12. A narrow-band high-speed switched-capacitor sixth order bandpass ladder filter

    E-Print Network [OSTI]

    Adut, Jozef

    2002-01-01T23:59:59.000Z

    In narrow-band high-speed switched-capacitor filters, the main limitation comes from the capacitance spread and from amplifier settling time. A secondary clock, that averages at an integer fraction of the main clock signal, is used to reduce...

  13. Effect of Narrow Cut Oil Shale Distillates on HCCI Engine Performance

    SciTech Connect (OSTI)

    Eaton, Scott J [ORNL; Bunting, Bruce G [ORNL; Lewis Sr, Samuel Arthur [ORNL; Fairbridge, Craig [National Centre for Upgrading Technology, Canada

    2009-01-01T23:59:59.000Z

    In this investigation, oil shale crude obtained from the Green River Formation in Colorado using Paraho Direct retorting was mildly hydrotreated and distilled to produce 7 narrow boiling point fuels of equal volumes. The resulting derived cetane numbers ranged between 38.3 and 43.9. Fuel chemistry and bulk properties strongly correlated with boiling point.

  14. Optical, UV, and X-ray Clues to the Nature of Narrow Line AGNs

    E-Print Network [OSTI]

    Ari Laor

    2000-05-08T23:59:59.000Z

    AGNs with narrow Balmer lines show various extreme properties. In particular, rapid X-ray variability, steep X-ray spectra, peculiar optical and UV line ratios, and possibly peculiar line profiles. Since all these phenomena occur together they are likely to be related to one specific underlying physical parameter. I review recent evidence, based on HST imaging of low z quasars, which suggests that the H-beta line width and continuum luminosity of quasars provide a reasonably accurate estimate of the black hole mass. This implies that narrow-line AGN have relatively low black hole masses, and thus high L/L_Edd, as independently suggested based on their steep X-ray spectra. I present additional evidence suggesting that the X-ray variability and the radio loudness are primarily driven by the black hole mass. The high mass inflow rate into the core of narrow-line AGNs may produce a denser and more enriched BLR, a high column radiation pressure driven outflow, and a smaller illumination angle for the NLR, as suggested by the observed emission line properties. Narrow-line AGNs may thus provide important clues for understanding the rich overall phenomenology of AGNs.

  15. Report narrows down impact of global warming People will soon be able to find out how

    E-Print Network [OSTI]

    Feigon, Brooke

    Report narrows down impact of global warming People will soon be able to find out how vulnerable their own local area is to global warming, thanks to a new report led by UEA. STARDEX, a European Union is taken to reduce human-induced global warming. "Although more research is needed to increase our

  16. A narrow-band high-speed switched-capacitor sixth order bandpass ladder filter

    E-Print Network [OSTI]

    Adut, Jozef

    2002-01-01T23:59:59.000Z

    In narrow-band high-speed switched-capacitor filters, the main limitation comes from the capacitance spread and from amplifier settling time. A secondary clock, that averages at an integer fraction of the main clock signal, is used to reduce...

  17. An Economic Comparison of Conventional and Narrow-Row Cotton Production--Southern Plains of Texas.

    E-Print Network [OSTI]

    Young, Kenneth B.; Adams, James R.

    1977-01-01T23:59:59.000Z

    JUN ~ 3 1977 Texas A&M University June 19' An Economic Comparison of Coventional and Narrow-Row -- Cotton Production-Southern High Plains of Texas The Texas Agricultural Experiment Station, J. E. Miller, Director' The Texas A&M University.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4 Yield Comparisons .......................................... 4 Differences in Inputs Used ............... :................... 6 Fertil izer and Irrigation Inputs . . .......................... 6 Seeding rate...

  18. Small Unmanned Aircraft Systems Technology and Applications in Agriculture

    E-Print Network [OSTI]

    Burchfield, David

    2014-11-19T23:59:59.000Z

    : Dr. Kevin Price Thesis: Mapping Eastern Redcedar (Juniperus virginiana L.) and Quantifying its Biomass in Riley County, Kansas Students and faculty at KSU enjoyed conducting research with sUAS, commonly referred to as Unmanned Aircraft Vehicles (UAVs.... Kevin Price demonstrating autonomous flight to the news media in July of 2013. More $13.6 billion in the first three years $82.1 billion between 2015 and 2025 More than 34,000 manufacturing jobs More than 70,000 new jobs in the first three...

  19. Aircraft Integration and Flight Testing of 4STAR

    SciTech Connect (OSTI)

    Flynn, CJ; Kassianov, E; Russell, P; Redemann, J; Dunagan, S; Holben, B

    2012-10-12T23:59:59.000Z

    Under funding from the U.S. Dept. of Energy, in conjunction with a funded NASA 2008 ROSES proposal, with internal support from Battelle Pacific Northwest Division (PNWD), and in collaboration with NASA Ames Research Center, we successfully integrated the Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR-Air) instrument for flight operation aboard Battelles G-1 aircraft and conducted a series of airborne and ground-based intensive measurement campaigns (hereafter referred to as intensives) for the purpose of maturing the initial 4STAR-Ground prototype to a flight-ready science-ready configuration.

  20. Preliminary assessment of the impact of commercial aircraft on local air quality in the U.S.

    E-Print Network [OSTI]

    Ratliff, Gayle L. (Gayle Lois)

    2007-01-01T23:59:59.000Z

    This thesis examines the impact of aircraft emissions on local air quality by performing two analyses: an assessment of U.S. commercial aircraft contribution to county budgets of primary pollutants in nonattainment areas, ...

  1. APPROACH TO HEALTH MONITORING OFAN AIRCRAFT STRUCTURE WITH RESISTIVE LADDER SENSORS DURING

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    APPROACH TO HEALTH MONITORING OFAN AIRCRAFT STRUCTURE WITH RESISTIVE LADDER SENSORS DURING FULL ladder sensors for health monitoring of an aircraft structure. Cracks forming can affect significantly and its size determination is one of the basic aims for Structural Health Monitoring (SHM) system

  2. INFORMATION: Audit Report on The Office of Secure Transportation DC-9 Aircraft Refurbishment

    SciTech Connect (OSTI)

    None

    2009-05-01T23:59:59.000Z

    The National Nuclear Security Administration's (NNSA) Office of Secure Transportation (OST) maintains a fleet of seven aircraft to transport sensitive items, equipment and security personnel. Based on increasing requirements for transporting components and security personnel, OST decided to add a heavy transport aircraft to meet the Department's weapons surety and emergency response missions. In 2004, as a replacement following the sale of a portion of its fleet, OST acquired a DC-9 cargo aircraft that had been excessed by the U.S. military. Prior to integrating the DC-9 into its fleet, NNSA ordered a refurbishment of the aircraft. This refurbishment project was to permit the aircraft to be certified to civil air standards so that it could transport passengers for site visits, training and other travel. The NNSA Service Center (Service Center) awarded a contract for the refurbishment of the aircraft in December 2004. In recent years, the Office of Inspector General has addressed a number of issues relating to the Department's aircraft management activities and services. As part of our ongoing review process and because of the national security importance of its fleet of aircraft, we conducted this review to determine whether OST had an effective and efficient aviation management program.

  3. A Contract-Based Methodology for Aircraft Electric Power System Design

    E-Print Network [OSTI]

    Xu, Huan

    1 A Contract-Based Methodology for Aircraft Electric Power System Design Pierluigi Nuzzo, Huan Xue, Sanjit A. Seshia Abstract--In an aircraft electric power system, one or more supervisory control units of our approach on a proof-of-concept electric power system design. I. INTRODUCTION The advent of high

  4. Dynamic State Estimation in Distributed Aircraft Electric Control Systems via Adaptive Submodularity

    E-Print Network [OSTI]

    Murray, Richard M.

    for the international space station, [10] for an aircraft electric system, and [7] for a marine vehicle power system industry signifies progress in the direction of more energy efficient vehicles. Electric systems are replac on electric power, the flight-criticality of an aircraft becomes more dependent on the electric power system

  5. ME 4171 Environmentally Conscious Design & Manufacturing (Bras) Assignment Aircraft Fuel Tank Production Pollution Prevention

    E-Print Network [OSTI]

    mainly in the aircraft industry. The main reasons for using fabric in the construction of these tanks Production Pollution Prevention A local company manufactures a wide variety of fabric fuel tanks for use are durability and shape requirements imposed by aircraft design. The construction process involves first

  6. A Case Study on Reactive Protocols for Aircraft Electric Power Distribution

    E-Print Network [OSTI]

    Xu, Huan

    A Case Study on Reactive Protocols for Aircraft Electric Power Distribution Huan Xu1, Ufuk Topcu2 electric power system that meets system requirements and reacts dynamically to changes in internal system to more-electric aircraft architectures possible. Conventional architectures utilize a combination

  7. Reactive Protocols for Aircraft Electric Power Distribution Huan Xu, Ufuk Topcu, and Richard M. Murray

    E-Print Network [OSTI]

    Murray, Richard M.

    Reactive Protocols for Aircraft Electric Power Distribution Huan Xu, Ufuk Topcu, and Richard M. Murray Abstract-- The increasing complexity of electric power sys- tems leads to integration and verification challenges. We consider the problem of designing a control protocol for the aircraft electric

  8. COLLABORATIVE VIRTUAL ENVIRONMENT TO SIMULATE ON-THE-JOB AIRCRAFT INSPECTION TRAINING AIDED BY HAND

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    is the backbone of the aircraft inspection process, a vital element in assuring safety and reliability of an air Engineering J. Masters Department of Psychology A. T. Duchowski Department of Computer Science Clemson was effective in improving inspection performance. INTRODUCTION Sound aircraft inspection and maintenance

  9. H Filtering with Inequality Constraints for Aircraft Turbofan Engine Health Estimation

    E-Print Network [OSTI]

    Simon, Dan

    shows how inequality-constrained H filtering can be applied to aircraft engine health estimation the inequality-constrained H filter can be reduced to a standard H filter combined with a quadratic programming health parameter estimation. This paper applies inequality-constrained H filtering to estimate aircraft

  10. Hazards of falling debris to people, aircraft, and watercraft

    SciTech Connect (OSTI)

    Cole, J.K.; Young, L.W.; Jordan-Culler, T.

    1997-04-01T23:59:59.000Z

    This report is a collection of studies performed at Sandia National Laboratories in support of Phase One (inert debris) for the Risk and Lethality Commonality Team. This team was created by the Range Safety Group of the Range Commander`s Council to evaluate the safety issues for debris generated during flight tests and to develop debris safety criteria that can be adopted by the national ranges. Physiological data on the effects of debris impacts on people are presented. Log-normal curves are developed to relate the impact kinetic energy of fragments to the probability of fatality for people exposed in standing, sitting, or prone positions. Debris hazards to aircraft resulting from engine ingestion or penetration of a structure or windshield are discussed. The smallest mass fragments of aluminum, steel, and tungsten that may be hazardous to current aircraft are defined. Fragment penetration of the deck of a small ship or a pleasure craft is also considered. The smallest mass fragments of aluminum, steel, or tungsten that can penetrate decks are calculated.

  11. Buffer layers for narrow bandgap a-SiGe solar cells

    SciTech Connect (OSTI)

    Liao, X.B.; Walker, J.; Deng, X.

    1999-07-01T23:59:59.000Z

    In high efficiency narrow bandgap (NBG) a-SiGe solar cells, thin buffer layers of unalloyed hydrogenated amorphous silicon (a-Si) are usually used at the interfaces between the a-SiGe intrinsic layer and the doped layers. They investigated the effect of inserting additional a-SiGe interface layers between these a-Si buffer layers and the a-SiGe absorber layer. They found that such additional interface layers increase solar cell V{sub oc} and FF sizably, most likely due to the reduction or elimination of the abrupt bandgap discontinuity between the a-SiGe absorber layer and the a-Si buffer layers. With these improved narrow bandgap solar cells incorporated into the fabrication of triple-junction a-Si based solar cells, they obtained triple cells with initial efficiency of 10.6%.

  12. Exploring dynamics of unstable many-body systems

    SciTech Connect (OSTI)

    Volya, Alexander [Department of Physics, Florida State University, Tallahassee, FL 32306-4350 (United States); Zelevinsky, Vladimir [National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-1321 (United States)

    2014-10-15T23:59:59.000Z

    In this work we acquaint reader with the Continuum Shell Model (CSM), which is a proper theoretical tool for the description of physics of unstable systems. We describe the effective non-Hermitian Hamiltonian of the CSM and concentrate on specific aspects of dynamics using realistic examples. The continuum effects are discussed in the case of weakly bound heavy oxygen isotopes, where inclusion of continuum coupling is necessary to improve the traditional nuclear shell model techniques. Physics of overlapping resonances is illustrated using recent experimental information on {sup 8}B nucleus. In the limit of strong continuum coupling the many-body states restructure relative to continuum leading to a few very broad super-radiant states, while at the same time other states become narrow and nearly decoupled from decay. The recent observations of very broad alpha clustering states in {sup 18}O is one of the most transparent manifestations of super-radiance.

  13. anti-aircraft defence: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    onto existing salinity variations in a semi-enclosed brackish water body such as the Baltic Sea, a decrease in salinity is predicted due DeWitt, Thomas J. 50 EVOLUTIONARY...

  14. Bioremediation of aircraft deicing fluids (glycol) at airports. Final report

    SciTech Connect (OSTI)

    Gallagher, D.W.

    1998-09-01T23:59:59.000Z

    This report describes the work done to determine the effectiveness of various aerobic bioremediation techniques for reducing the biochemical oxygen demand (BOD) of aircraft deicing fluid runoff. Primary emphasis has been placed on laboratory and field demonstrations of bioremediation systems using various combinations of inocula (bacteria), nutrient mixes, enzyme mixes, and ultrasonic stimulation. Laboratory experiments with a variety of inocula and nutrients together with enzymes and ultrasound are demonstrated showing the importance of the appropriate bacteria and nutrient mix in bioaugmentation. The appropriate mix was shown to significantly influence biodegradation. Deicing solutions were routinely reduced to acceptable BOD levels for effluent discharge in 3 days or less. In the field experiment, a special dual-tank bioreactor system was developed to demonstrate a pilot small-scale system. Experimental operation of this system confirmed that a 3-day or less remediation cycle was possible during the winter season.

  15. Technical evaluation of Russian aircraft stealth coating and structural materials

    SciTech Connect (OSTI)

    Gac, F.D.; Young, A.T. Jr.; Migliori, A.

    1996-10-01T23:59:59.000Z

    Treating aircraft, missiles, and ships with materials that absorb electromagnetic energy continues to be an important technique for reducing a vehicle`s radar cross section (RCS) and improving tis combat effectiveness and survivability. Work at the Russian Scientific Center for Applied Problems in Electrodynamics (SCAPE) has produced and experimentally validated an accurate predictor of the interaction of electromagnetic radiation with discontinuous composite materials consisting of magnetic and/or dielectric particles dispersed in a non-conductive matrix (i.e. percolation systems). The primary purpose of this project was to analyze rf-absorbing coatings and validate manufacturing processes associated with the Russian percolation system designs. An additional objective was to apply the percolation methodology toward a variety of civilian applications by transferring the technology to US industry.

  16. Development and validation of bonded composite doubler repairs for commercial aircraft.

    SciTech Connect (OSTI)

    Roach, Dennis Patrick; Rackow, Kirk A.

    2007-07-01T23:59:59.000Z

    A typical aircraft can experience over 2,000 fatigue cycles (cabin pressurizations) and even greater flight hours in a single year. An unavoidable by-product of aircraft use is that crack, impact, and corrosion flaws develop throughout the aircraft's skin and substructure elements. Economic barriers to the purchase of new aircraft have placed even greater demands on efficient and safe repair methods. The use of bonded composite doublers offers the airframe manufacturers and aircraft maintenance facilities a cost effective method to safely extend the lives of their aircraft. Instead of riveting multiple steel or aluminum plates to facilitate an aircraft repair, it is now possible to bond a single Boron-Epoxy composite doubler to the damaged structure. The FAA's Airworthiness Assurance Center at Sandia National Labs (AANC), Boeing, and Federal Express completed a pilot program to validate and introduce composite doubler repair technology to the U.S. commercial aircraft industry. This project focused on repair of DC-10 fuselage structure and its primary goal was to demonstrate routine use of this repair technology using niche applications that streamline the design-to-installation process. As composite doubler repairs gradually appear in the commercial aircraft arena, successful flight operation data is being accumulated. These commercial aircraft repairs are not only demonstrating the engineering and economic advantages of composite doubler technology but they are also establishing the ability of commercial maintenance depots to safely adopt this repair technique. This report presents the array of engineering activities that were completed in order to make this technology available for widespread commercial aircraft use. Focused laboratory testing was conducted to compliment the field data and to address specific issues regarding damage tolerance and flaw growth in composite doubler repairs. Fatigue and strength tests were performed on a simulated wing repair using a substandard design and a flawed installation. In addition, the new Sol-Gel surface preparation technique was evaluated. Fatigue coupon tests produced Sol-Gel results that could be compared with a large performance database from conventional, riveted repairs. It was demonstrated that not only can composite doublers perform well in severe off-design conditions (low doubler stiffness and presence of defects in doubler installation) but that the Sol-Gel surface preparation technique is easier and quicker to carry out while still producing optimum bonding properties. Nondestructive inspection (NDI) methods were developed so that the potential for disbond and delamination growth could be monitored and crack growth mitigation could be quantified. The NDI methods were validated using full-scale test articles and the FedEx aircraft installations. It was demonstrated that specialized NDI techniques can detect flaws in composite doubler installations before they reach critical size. Probability of Detection studies were integrated into the FedEx training in order to quantify the ability of aircraft maintenance depots to properly monitor these repairs. In addition, Boeing Structural Repair and Nondestructive Testing Manuals were modified to include composite doubler repair and inspection procedures. This report presents the results from the FedEx Pilot Program that involved installation and surveillance of numerous repairs on operating aircraft. Results from critical NDI evaluations are reported in light of damage tolerance assessments for bonded composite doublers. This work has produced significant interest from airlines and aircraft manufacturers. The successful Pilot Program produced flight performance history to establish the durability of bonded composite patches as a permanent repair on commercial aircraft structures. This report discusses both the laboratory data and Pilot Program results from repair installations on operating aircraft to introduce composite doubler repairs into mainstream commercial aircraft use.

  17. A Comprehensive Program for Measurement of Military Aircraft Emissions

    SciTech Connect (OSTI)

    Cheng, Mengdawn [ORNL

    2009-11-01T23:59:59.000Z

    Emissions of gases and particulate matter by military aircraft were characterized inplume by 'extractive' and 'optical remote-sensing (ORS)' technologies. Non-volatile particle size distribution, number and mass concentrations were measured with good precision and reproducibly. Time-integrated particulate filter samples were collected and analyzed for smoke number, elemental composition, carbon contents, and sulfate. Observed at EEP the geometric mean diameter (as measured by the mobility diameter) generally increased as the engine power setting increased, which is consistent with downstream observations. The modal diameters at the downstream locations are larger than that at EEP at the same engine power level. The results indicate that engine particles were processed by condensation, for example, leading to particle growth in-plume. Elemental analysis indicated little metals were present in the exhaust, while most of the exhaust materials in the particulate phase were carbon and sulfate (in the JP-8 fuel). CO, CO{sub 2}, NO, NO{sub 2}, SO{sub 2}, HCHO, ethylene, acetylene, propylene, and alkanes were measured. The last five species were most noticeable under engine idle condition. The levels of hydrocarbons emitted at high engine power level were generally below the detection limits. ORS techniques yielded real-time gaseous measurement, but the same techniques could not be extended directly to ultrafine particles found in all engine exhausts. The results validated sampling methodology and measurement techniques used for non-volatile particulate aircraft emissions, which also highlighted the needs for further research on sampling and measurement for volatile particulate matter and semi-volatile species in the engine exhaust especially at the low engine power setting.

  18. Aircraft control using nonlinear dynamic inversion in conjunction with adaptive robust control

    E-Print Network [OSTI]

    Fisher, James Robert

    2005-02-17T23:59:59.000Z

    on the scheduling parameters [1, 2]. Dynamic Inversion may also be used to schedule control actions. The dynamics of an aircraft can be represented by the following dynamic differential equation: ? = f (x;t;G)+g(x;t;G)u x 2 Rn?1; u 2 Rp?1; (p > n) (II.1) The vector... x represents aircraft states and u represents a vector of control inputs. Only the case where p > n will be considered, although many aircraft have p = n or even p < n. The vector G consists of measurements including flight condition and states which...

  19. Proceedings of the International Workshop on inspection and evaluation of aging aircraft

    SciTech Connect (OSTI)

    Not Available

    1993-01-01T23:59:59.000Z

    Economics is the key issue in a discussion on the inspection of aging aircraft. The airline industry has taken heavy losses resulting in layoffs and bankruptcies in recent years. Improving air service to customers is the ultimate reason for conducting research on the effects of aging on aircraft, but cost must be taken into account for the effective implementation of inspection programs. These papers present state of the art research to predict, detect, define, and correct the effects of age and usage on the metals and materials used in construction of aircraft and powerplants. Individual papers are abstracted separately.

  20. Office of Inspector General audit report on aircraft and air service management programs

    SciTech Connect (OSTI)

    NONE

    1999-01-01T23:59:59.000Z

    The Department of Energy`s (DOE) Albuquerque Operations Office (Albuquerque) owns seven aircraft that support defense programs, research and development efforts, emergency response programs, and official travel of Government and contractor employees. An Office of Inspector General (OIG) report, issued in 1994, identified concerns with Albuquerque`s cost for air service. Since that report, there have been reductions in cost and personnel indicating changes in air service requirements. This audit was conducted to determine (1) whether costs to operate Albuquerque`s aircraft were excessive and (2) if individual aircraft in the fleet were justified.

  1. Observation of spectral gain narrowing in a high-order harmonic seeded soft-x-ray amplifier

    SciTech Connect (OSTI)

    Tissandier, F.; Sebban, S.; Ribiere, M.; Gautier, J.; Zeitoun, Ph.; Lambert, G.; Barszczak Sardinha, A.; Goddet, J.-Ph.; Burgy, F.; Lefrou, T.; Valentin, C.; Rousse, A.; Guilbaud, O.; Klisnick, A.; Nejdl, J.; Mocek, T.; Maynard, G. [Laboratoire d'Optique Appliquee, ENSTA Paristech/Ecole Polytechnique/CNRS UMR 7639, F-91761 Palaiseau Cedex (France); Laboratoire d'Interaction du Rayonnement X Avec la Matiere, Universite Paris Sud/CNRS UMR 8624, F-91495 Orsay Cedex (France); Department of X-ray Lasers, Institute of Physics, Na Slovance 2, CZ-182 21 Prague 8 (Czech Republic); Laboratoire de Physique des Gaz et des Plasmas, Universite Paris Sud/CNRS UMR 8578, F-91405 Orsay Cedex (France)

    2010-06-15T23:59:59.000Z

    We report an observation of spectral gain narrowing of a high-order harmonic amplified by a soft-x-ray optical-field-ionized plasma. The temporal coherence and spectral linewidth of both the seeded and unseeded soft-x-ray lasers were experimentally measured using a varying-path-difference interferometer. The results showed that the high-order harmonic is subject to a strong spectral narrowing during its propagation in the plasma amplifier without rebroadening at saturation. This is in good agreement with a radiative transfer calculation including gain narrowing and saturation rebroadening.

  2. Bodies of information : reinventing bodies and practice in medical education

    E-Print Network [OSTI]

    Prentice, Rachel

    2004-01-01T23:59:59.000Z

    This dissertation recounts the development of graphic models of human bodies and virtual reality simulators for teaching anatomy and surgery to medical students, residents, and physicians. It considers how researchers from ...

  3. A physics-based emissions model for aircraft gas turbine combustors

    E-Print Network [OSTI]

    Allaire, Douglas L

    2006-01-01T23:59:59.000Z

    In this thesis, a physics-based model of an aircraft gas turbine combustor is developed for predicting NO. and CO emissions. The objective of the model is to predict the emissions of current and potential future gas turbine ...

  4. astovl lift-fan aircraft: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Generation CiteSeer Summary: Many aircraft make use of an on-board oxygen generation system to provide breathing oxygen for the aircrew. Compared to historical experience, there...

  5. Design of a model propulsor for a boundary layer ingesting aircraft

    E-Print Network [OSTI]

    Grasch, Adam D. (Adam Davis)

    2013-01-01T23:59:59.000Z

    This thesis presents contributions to the analysis and design of propulsion simulators for 1:11 and 1:4 scale model wind tunnel investigations of an advanced civil transport aircraft with boundary layer ingestion (BLI). ...

  6. Cost-benefit analysis of aircraft design for environment using a fleet perspective and real options

    E-Print Network [OSTI]

    Hynes, Christopher Dennis

    2005-01-01T23:59:59.000Z

    Traditional multidisciplinary design optimization (MDO) approaches do not examine the costs associated with damage due to environmental factors and are usually implemented to examine one aircraft. The Environmental Design ...

  7. Camera that takes pictures of aircraft and ground vehicle tires can save lives

    E-Print Network [OSTI]

    Wiseman, Yair

    ;Camera that takes pictures of aircraft and ground vehicle tires can save lives Yair Wiseman Holon Institute of Technology Computer Science Department Holon 58102, Israel E-mail: wiseman

  8. Reconfigurable autopilot design for a high performance aircraft using model predictive control

    E-Print Network [OSTI]

    Ruiz, Jose Pedro, 1980-

    2004-01-01T23:59:59.000Z

    The losses of military and civilian aircraft due to control surface failures have prompted research into controllers with a degree of reconfiguration. This thesis will describe a design approach incorporating Model Predictive ...

  9. Development and assessment of a soot emissions model for aircraft gas turbine engines

    E-Print Network [OSTI]

    Martini, Bastien

    2008-01-01T23:59:59.000Z

    Assessing candidate policies designed to address the impact of aviation on the environment requires a simplified method to estimate pollutant emissions for current and future aircraft gas turbine engines under different ...

  10. Extending safety assessment methods for remotely piloted aircraft operations in the national airspace system

    E-Print Network [OSTI]

    Horrell, Alexander C. (Alexander Chapman)

    2012-01-01T23:59:59.000Z

    Remotely Piloted Aircraft operations are growing rapidly in the United States specifically for the Department of Defense to achieve training needs. To ensure the safety of the National Airspace System is maintained to a ...

  11. Design of aircraft noise abatement approach procedures for near-term implementation

    E-Print Network [OSTI]

    Ho, Nhut Tan, 1974-

    2005-01-01T23:59:59.000Z

    Advanced aircraft noise abatement approach procedures -- characterized by decelerating, continuous descent approaches using idle thrust, and enabled by flight guidance technologies such as GPS and FMS -- have been shown ...

  12. Development and Implementation of a Statistical Risk Assessment Method for New Aircraft Performance at XYZ Corporation

    E-Print Network [OSTI]

    Schroeder, Christopher R.

    2009-12-18T23:59:59.000Z

    At XYZ Corporation (XYZ), the standard method of creating aircraft performance guarantees does not incorporate engineering risk or uncertainty. Since performance guarantees are a contractual agreement to the customer, the customer is not obligated...

  13. A solution to the inherent list on Nimitz class aircraft carriers

    E-Print Network [OSTI]

    Wolfson, Dianna

    2004-01-01T23:59:59.000Z

    Nimitz class aircraft carriers possess an inherent list to starboard that their list control systems (LCS) are typically unable to correct while under Combat Load Conditions. As a result, it has become necessary to use ...

  14. Strategy for reducing the length and variability of aircraft lead time

    E-Print Network [OSTI]

    Bielat, Brendon (Brendon Michael)

    2010-01-01T23:59:59.000Z

    Helicopter manufacturers typically build each aircraft to order, and the lead time for make or buy parts and assemblies can be several months or more. The manufacturers generally have a backlog of orders at any given time, ...

  15. Performance and Emission Characteristics of an Aircraft Turbo Diesel Engine using JET-A Fuel

    E-Print Network [OSTI]

    Underwood, Sean Christopher

    2008-05-05T23:59:59.000Z

    Performance and emission data was acquired by testing an aircraft turbo diesel engine with JET-A at the Mal Harned Propulsion Laboratory of the University of Kansas. The performance data was analyzed and compared to the presented data...

  16. Stability derivative extraction from flight test data for a general aviation aircraft

    E-Print Network [OSTI]

    Randall, Brian Edward

    1996-01-01T23:59:59.000Z

    The Gulfstream Commander 700 (N700AE) aircraft owned by the Texas A&M Flight Mechanics Laboratory (FML) is currently being modeled on the Engineering Flight Simulator (EFS) for testing of an integrated cockpit system for general aviation (GA...

  17. Determining appropriate levels of robotic automation in commercial aircraft nacelle assembly

    E-Print Network [OSTI]

    Durham, Bryce J. (Bryce James)

    2014-01-01T23:59:59.000Z

    This thesis examines the application of reconfigurable industrial robotics in the assembly of the engine nacelle inlet for a commercial aircraft. In addition to addressing the achievable level of automation, this thesis ...

  18. The evolution of U.S. commercial domestic aircraft operations from 1991 to 2010

    E-Print Network [OSTI]

    Wulz, Alexander Andrew

    2012-01-01T23:59:59.000Z

    The main objective of this thesis is to explore the evolution of U.S. commercial domestic aircraft operations from 1991 to 2010 and describe the implications for future U.S. commercial domestic fleets. Using data collected ...

  19. Optimization of opportunistic replacement activities: A case study in the aircraft industry

    E-Print Network [OSTI]

    Patriksson, Michael

    must there- fore be opportunistic, incorporating preventive maintenance activities within the scheduled to consider that the maintenance event is an opportunity for preventive maintenance#22;an opportunity Svensson # Abstract In the aircraft industry maximizing availability is essential. Maintenance schedules

  20. Microphysical modeling of ultrane hydrocarbon-containing aerosols in aircraft emissions

    E-Print Network [OSTI]

    Jun, Mina

    2011-01-01T23:59:59.000Z

    Combustion engines emit precursors of ne particulate matter (PM) into the atmosphere. Numerous gaseous species, soot particles, and liquid aerosols in the aircraft exhaust are involved in PM formation, and these very ne, ...

  1. The Trust Region Sequential Quadratic Programming method applied to two-aircraft acoustic optimal control problem

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The Trust Region Sequential Quadratic Programming method applied to two-aircraft acoustic optimal of the environmental pollution and noise impact, ACARE requires a 50% reduction of perceived noise for 2020. This goal

  2. Application of Real Options to Evaluate the Development Process of New Aircraft Models

    E-Print Network [OSTI]

    Miller, Bruno

    2004-01-01T23:59:59.000Z

    Investment decisions in the development and production of new aircraft models is difficult because of the technical and market uncertainties associated with such a complex process. The accompanying risks can be

  3. aircraft life-support systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    members with food, potable water Baruh, Haim 125 The 2011 Cessna Aircraft CompanyRaytheon Missile Systems DesignBuildFly Competition Flyoff was held at TIMPA Field in...

  4. The cost of noise reduction for departure and arrival operations of commercial tilt rotor aircraft

    E-Print Network [OSTI]

    Faulkner, Henry B.

    1976-01-01T23:59:59.000Z

    The relationship between direct operating cost (DOC) and noise annoyance due to a departure and an arrival operation was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt ...

  5. Design of an instrumented workpart for robotic aircraft wing-box assembly

    E-Print Network [OSTI]

    Kaina, Leighton

    2006-01-01T23:59:59.000Z

    The idea of an underactuated robotic arm used in aircraft wing assembly and production was created to improve the wing-box assembly process. In order to display the robots capabilities and areas of improvement, a suitable ...

  6. Design of multifunctional paired robots engaged across a thin plate for aircraft manufacturing and maintenance

    E-Print Network [OSTI]

    Karasic, Geoffrey Ian

    2011-01-01T23:59:59.000Z

    The aircraft industry lacks an automated system for wing box manufacturing and maintenance. Currently workers assemble and inspect thousands of fasteners in the wing structure by hand. This manufacturing process consumes ...

  7. The multidisciplinary design and organization of an unconventional, extremely quiet transport aircraft

    E-Print Network [OSTI]

    Diedrich, Adam John, 1980-

    2005-01-01T23:59:59.000Z

    (cont.) aircraft. A design which utilized the results of the trade studies was presented and evaluated. The performance was reviewed in terms of aerodynamics, weight, economics, operations, and acoustics. The resulting ...

  8. The cost of noise reduction for powered-lift S.T.O.L. aircraft

    E-Print Network [OSTI]

    Moore, Wesley F.

    1973-01-01T23:59:59.000Z

    The direct operating costs and noise impacts of a wide variety of Externally Blown Flap and Augmentor Wing STOL short haul transport aircraft designs were evaluated to study the costs of noise reduction for these types of ...

  9. Observation of Narrow Structures in the P-P Elastic Analyzing Power

    E-Print Network [OSTI]

    Shimizu, H.; Yoshida, H. Y.; Ohnuma, H.; Kobayashi, Y.; Kobayashi, K.; Nakagawa, T.; Holt, J. A.; Glass, G.; Hiebert, John C.; Kenefick, R. A.; Nath, S.; Northcliffe, L. C.; Simon, A.; Hirmatsu, S.; Mori, Y.; Sato, H.; Takagi, A.; Toyana, T.; Ueno, A.; Imai, K.

    1990-01-01T23:59:59.000Z

    PHYSICAL REVIEW C VOLUME 42, NUMBER 2 AUGUST 1990 Observation of narrow structures in the p-p elastic analyzing power H. Shimizu, * H. Y. Yoshida, and H. Ohnuma Department of Physics, Tokyo Institute of Techno1ogy, Tokyo 152, Japan Y. Kobayashi... synchrotron (PS) using an internal target. The number of circulating polarized protons in the PS ring was typically 1 &&10 . A very thin polyethylene thread (30 pm in diameter) was used as the internal target since the effective beam intensity was very...

  10. Observation of Narrow Structures in the P-P Elastic Analyzing Power

    E-Print Network [OSTI]

    Shimizu, H.; Yoshida, H. Y.; Ohnuma, H.; Kobayashi, Y.; Kobayashi, K.; Nakagawa, T.; Holt, J. A.; Glass, G.; Hiebert, John C.; Kenefick, R. A.; Nath, S.; Northcliffe, L. C.; Simon, A.; Hirmatsu, S.; Mori, Y.; Sato, H.; Takagi, A.; Toyana, T.; Ueno, A.; Imai, K.

    1990-01-01T23:59:59.000Z

    PHYSICAL REVIEW C VOLUME 42, NUMBER 2 AUGUST 1990 Observation of narrow structures in the p-p elastic analyzing power H. Shimizu, * H. Y. Yoshida, and H. Ohnuma Department of Physics, Tokyo Institute of Techno1ogy, Tokyo 152, Japan Y. Kobayashi... cross section, made at LAMPF utilizing a "white ' source of incident neutrons; of the p-p elastic differential cross section, made at Laboratoire National Saturne, Centre d'Etudes Nucleaires de Saclay (LNS), with a hydrogen-gas-jet target...

  11. Narrow linewidth, single frequency semiconductor laser with a phase conjugate external cavity mirror

    SciTech Connect (OSTI)

    Vahala, K.; Kyuma, K.; Yariv, A.; Kwong, S.; Cronin-Golomb, M.; Lau, K.Y.

    1986-12-08T23:59:59.000Z

    We measure the spectral characteristics of an external cavity semiconductor laser which uses a phase conjugate mirror for its external reflection. This device has significant advantages over the conventional external cavity system owing to the self-aligning nature of the phase conjugate mirror. The fiber delay line self-heterodyne technique is used to measure the fundamental linewidth for single mode operation of this device. It shows the linewidth to be at least as narrow as the instrumental resolution of 100 kHz.

  12. Prediction of narrow $N^{*}$ and $?^*$ resonances with hidden charm above 4 GeV

    E-Print Network [OSTI]

    Jia-Jun Wu; R. Molina; E. Oset; B. S. Zou

    2010-07-04T23:59:59.000Z

    The interaction between various charmed mesons and charmed baryons are studied within the framework of the coupled channel unitary approach with the local hidden gauge formalism. Several meson-baryon dynamically generated narrow $N^*$ and $\\Lambda^*$ resonances with hidden charm are predicted with mass above 4 GeV and width smaller than 100 MeV. The predicted new resonances definitely cannot be accommodated by quark models with three constituent quarks and can be looked for at the forthcoming PANDA/FAIR experiments.

  13. Leaky-wave semiconductor laser with improved energetic characteristics and very narrow dirrectional pattern

    SciTech Connect (OSTI)

    Aleshkin, V Ya; Dubinov, A A [Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation); Babushkina, T S; Biryukov, A A; Zvonkov, B N; Kolesnikov, M N [Scientific-Research Physicotechnical Institute at the N.I.Lobachevsky Nizhnii Novgorod State University, Nizhnii Novgorod (Russian Federation); Nekorkin, Vladimir I

    2010-12-09T23:59:59.000Z

    A leaky-wave semiconductor laser diode has been developed based on the InGaAs/GaAs/InGaP heterostructure. This design made it possible to obtain a high radiation output in a narrow angular range (about 1{sup 0}-2{sup 0}) with an energy of 170 {mu}J in a laser with a cavity length of 0.8 mm and a stripe contact width of 360 {mu}m, pumped by a single current pulse with an amplitude of 88 A and width of 5 {mu}s. (lasers)

  14. MHK Projects/Tacoma Narrows Tidal Energy Project | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRose Bend < MHK Projects Jump to: navigation, searchJintangTE4Narrows

  15. The ORNL whole body counter

    SciTech Connect (OSTI)

    Not Available

    1988-01-01T23:59:59.000Z

    This report is a non-technical document intended to provide an individual about to undergo a whole-body radiation count with a general understanding of the counting procedure and with the results obtained. 9 figs. (TEM)

  16. Bioanalytical Applications of Fluorescence Line-Narrowing and Non-Line-Narrowing Spectroscopy Interfaced with Capillary Electrophoresis and High-Performance Liquid Chromatography

    SciTech Connect (OSTI)

    Kenneth Paul Roberts

    2002-06-27T23:59:59.000Z

    Capillary electrophoresis (CE) and high-performance liquid chromatography (HPLC) are widely used analytical separation techniques with many applications in chemical, biochemical, and biomedical sciences. Conventional analyte identification in these techniques is based on retention/migration times of standards; requiring a high degree of reproducibility, availability of reliable standards, and absence of coelution. From this, several new information-rich detection methods (also known as hyphenated techniques) are being explored that would be capable of providing unambiguous on-line identification of separating analytes in CE and HPLC. As further discussed, a number of such on-line detection methods have shown considerable success, including Raman, nuclear magnetic resonance (NMR), mass spectrometry (MS), and fluorescence line-narrowing spectroscopy (FLNS). In this thesis, the feasibility and potential of combining the highly sensitive and selective laser-based detection method of FLNS with analytical separation techniques are discussed and presented. A summary of previously demonstrated FLNS detection interfaced with chromatography and electrophoresis is given, and recent results from on-line FLNS detection in CE (CE-FLNS), and the new combination of HPLC-FLNS, are shown.

  17. Instrumentation of a light twin aircraft for flow energizer flight tests

    E-Print Network [OSTI]

    Binford, Robert Susumu

    1986-01-01T23:59:59.000Z

    INSTRUMDITATION OF A LIGHT TWIN AIRCRAFT FOR FLOW ENERGIZER FLIGHT TESTS A Thesis by ROBERT SUSUMU BINFORD Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirements for the degree of HASTER... OF SCIENCE August 1986 MaJor SubJect: Aerospace Engineering INSTRUMENTATION OF A LIGHT TWIN AIRCRAFT FOR FLOW ENERGIZER FLIGHT TESTS A Thesis by ROBERT SUSUMU BINFORD Approved as to style and content by: Donald T. Ward (Chairman of Committee) Cyrus...

  18. A method of evaluating the performance deterioration of aircraft gas-turbines

    E-Print Network [OSTI]

    Subramanian, V

    1978-01-01T23:59:59.000Z

    A METHOD OF EVALUATING THE PERFORMANCE DETERIORATION OF AIRCRAFT GAS-TURBINES A Thesis by V. SUBRAMANIAN Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May 1978 Major Subject: Mechanical Engineering A METHOD OF EVALUATING THE PERFORMANCE DETERIORATION OF AIRCRAFT GAS-TURBINES A Thesis by V. SUBRAMANIAN Approved as to style and content by: Charrman o Commztt (Head o D pa ment Sg D~ Member...

  19. A network approach for identifying minimum-cost aircraft routing and fuel-allocating decisions

    E-Print Network [OSTI]

    Kabbani, Nader Mahmoud

    1988-01-01T23:59:59.000Z

    of aircraft fuel utilization and conservation were This thesis conforms to Operations Research standards on format and style. needed. These training programs, imposed by the Federal Aviation Administration (FAA), have helped emphasize the significance... of potential traffic bottlenecks, thus leading to more fuel-efficient aircraft models. The Federal Aviation Administration (FAA) is co- ordinating the model, which they view as a way to alleviate problems concerning both short- and long-term strategic...

  20. Intelligent executive guidance agent for general aviation aircraft under free flight

    E-Print Network [OSTI]

    Rong, Jie

    2002-01-01T23:59:59.000Z

    INTELLIGENT EXECUTIVE GUIDANCE AGENT FOR GENERAL AVIATION AIRCRAFT UNDER FREE FLIGHT A Thesis by JIE RONG Subnutted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 2002 Malor Subject: Aerospace Engineering INTELLIGENT EXECUTIVE GUIDANCE AGENT FOR GENERAL AVIATION AIRCRAFT UNDER FREE FLIGHT A Thesis by JIE RONG Submitted to Texas A&M University in partial fulfillment of the requirements...

  1. The potential of future aircraft technology for noise and pollutant emissions reduction

    E-Print Network [OSTI]

    Graham, W. R.; Hall, C. A.; Vera Morales, M.

    2014-03-27T23:59:59.000Z

    drag associated with wasted kinetic energy in the aircrafts wake. Induced drag depends on the aspect ratio of the wing; it is reduced when the span is increased. The parametric dependence of Eq. (1) is even clearer if the argument... ) are associated with a range of air-quality-related human health impacts through several different paths. They also play a significant part in atmospheric chemistry, and thereby can enhance or mitigate the radiative heating of the earth, depending on altitude...

  2. Data development technical support document for the aircraft crash risk analysis methodology (ACRAM) standard

    SciTech Connect (OSTI)

    Kimura, C.Y.; Glaser, R.E.; Mensing, R.W.; Lin, T.; Haley, T.A.; Barto, A.B.; Stutzke, M.A.

    1996-08-01T23:59:59.000Z

    The Aircraft Crash Risk Analysis Methodology (ACRAM) Panel has been formed by the US Department of Energy Office of Defense Programs (DOE/DP) for the purpose of developing a standard methodology for determining the risk from aircraft crashes onto DOE ground facilities. In order to accomplish this goal, the ACRAM panel has been divided into four teams, the data development team, the model evaluation team, the structural analysis team, and the consequence team. Each team, consisting of at least one member of the ACRAM plus additional DOE and DOE contractor personnel, specializes in the development of the methodology assigned to that team. This report documents the work performed by the data development team and provides the technical basis for the data used by the ACRAM Standard for determining the aircraft crash frequency. This report should be used to provide the generic data needed to calculate the aircraft crash frequency into the facility under consideration as part of the process for determining the aircraft crash risk to ground facilities as given by the DOE Standard Aircraft Crash Risk Assessment Methodology (ACRAM). Some broad guidance is presented on how to obtain the needed site-specific and facility specific data but this data is not provided by this document.

  3. Dangerous Bodies: Freak Shows, Expression, and Exploitation

    E-Print Network [OSTI]

    Fordham, Brigham A.

    2007-01-01T23:59:59.000Z

    Dangerous Bodies: Freak Shows, Expression, and ExploitationR.I. GEN. LAWS 11-9-1. DANGEROUS BODIES Rhode Island does161 Id. Id. 165 id. 166 Id. DANGEROUS BODIES This argument

  4. Nature of the narrow optical band in H*-aggregates: Dozy-chaosexciton coupling

    SciTech Connect (OSTI)

    Egorov, Vladimir V., E-mail: egorov@photonics.ru [Photochemistry Center, Russian Academy of Sciences, Moscow, 119421 (Russian Federation)

    2014-07-15T23:59:59.000Z

    Dozy chaos emerges as a combined effect of the collective chaotic motion of electrons and nuclei, and their chaotic electromagnetic interactions in the transient state of molecules experiencing quantum transitions. Following earlier discussions of the well-known Brnsted relations for proton-transfer reactions; the temperature-dependent electron transfer in LangmuirBlodgett films; the shape of the optical bands of polymethine dye monomers, their dimers, and J-aggregates, this paper reports one more application of the dozy-chaos theory of molecular quantum transitions. The qualitative and quantitative explanations for shape of a narrow and blue-shifted optical absorption band in H{sup *}-aggregates is given on the basis of the dozy-chaos theory by taking into account the dozy-chaosexciton coupling effect. It is emphasized that in the H{sup *}-aggregate chromophore (dimer of cyclic bis-thiacarbocyanines) there is a competition between two Frenkel exciton transitions through the chaotic reorganization motion of nuclear environment. As a result, the highly organized quantum transition to the upper exciton state becomes an exciton-induced source of dozy chaos for the low organized transition to the lower exciton state. This manifests itself in appearing the narrow peak and broad wing in the optical spectrum pattern of H{sup *}-aggregates. A similar enhancement in the H{sup *}-effect caused by the strengthening of the exciton coupling in H{sup *}-dimers, which could be achieved by synthesizing tertiary and quarternary thiacarbocyanine monomers, is predicted.

  5. Fermion space charge in narrow-band gap semiconductors, Weyl semimetals and around highly charged nuclei

    E-Print Network [OSTI]

    Eugene B. Kolomeisky; Joseph P. Straley; Hussain Zaidi

    2013-10-15T23:59:59.000Z

    The field of charged impurities in narrow-band gap semiconductors and Weyl semimetals can create electron-hole pairs when the total charge $Ze$ of the impurity exceeds a value $Z_{c}e$. The particles of one charge escape to infinity, leaving a screening space charge. The result is that the observable dimensionless impurity charge $Q_{\\infty}$ is less than $Z$ but greater than $Z_{c}$. There is a corresponding effect for nuclei with $Z >Z_{c} \\approx 170$, however in the condensed matter setting we find $Z_{c} \\simeq 10$. Thomas-Fermi theory indicates that $Q_{\\infty} = 0$ for the Weyl semimetal, but we argue that this is a defect of the theory. For the case of a highly-charged recombination center in a narrow band-gap semiconductor (or of a supercharged nucleus), the observable charge takes on a nearly universal value. In Weyl semimetals the observable charge takes on the universal value $Q_{\\infty} = Z_{c}$ set by the reciprocal of material's fine structure constant.

  6. D{sup 0} magnetism in Ca doped narrow carbon nanotubes: First principle chirality effect study

    SciTech Connect (OSTI)

    Hajiheidari, F.; Khoshnevisan, B., E-mail: b.khosh@kashanu.ac.ir [Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of); Hashemifar, S. J. [Faculty of Physics, Isfahan University of technology, 84156-83111 Isfahan (Iran, Islamic Republic of)

    2014-06-21T23:59:59.000Z

    Curvature has always had crucial effects on the physical properties of narrow carbon nanotubes (CNTs) and here spin-polarized density functional calculations were employed to study electronic and magnetic properties of calcium-decorated narrow (5,5) and (9,0)CNTs with close diameters (?7?) and different chiralities. Our results showed that chirality had great impact on the electronic structure and magnetization of the doped CNTs. In addition, internally or externally doping of the calcium atoms was studied comparatively and although for the (9,0)CNT the internal doping was the most stable configuration, which involves a novel kind of spin-polarization originated from Ca-4s electrons, but for the (5,5)tube the external doping was the most stable one without any spin-polarization. On the other hand, calcium doping in the center of the (5,5)CNT was an endothermic process and led to the spin-polarization of unoccupied Ca-3d orbitals via direct exchange interaction between adjacent Ca atoms. In the considered systems, the existence of magnetization in the absence of any transition-metal elements was an example of valuable d{sup 0} magnetism title.

  7. aircraft baggage compartment: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Tissue cB,gCerebral Tissue qs Body Head ElvVlvErv cv,g Rtv qv qap Vvs Cvs qvc pvs pvc pac Rvc Rac qac Rav qvp Vvp RmvRpv ca,g cv,g Rtv qv qap Vvs Cvs qvc pvs pvc pac Rvc Rac...

  8. Hanford whole body counting manual

    SciTech Connect (OSTI)

    Palmer, H.E.; Rieksts, G.A.; Lynch, T.P.

    1990-06-01T23:59:59.000Z

    This document describes the Hanford Whole Body Counting Program as it is administered by Pacific Northwest Laboratory (PNL) in support of the US Department of Energy--Richland Operations Office (DOE-RL) and its Hanford contractors. Program services include providing in vivo measurements of internally deposited radioactivity in Hanford employees (or visitors). Specific chapters of this manual deal with the following subjects: program operational charter, authority, administration, and practices, including interpreting applicable DOE Orders, regulations, and guidance into criteria for in vivo measurement frequency, etc., for the plant-wide whole body counting services; state-of-the-art facilities and equipment used to provide the best in vivo measurement results possible for the approximately 11,000 measurements made annually; procedures for performing the various in vivo measurements at the Whole Body Counter (WBC) and related facilities including whole body counts; operation and maintenance of counting equipment, quality assurance provisions of the program, WBC data processing functions, statistical aspects of in vivo measurements, and whole body counting records and associated guidance documents. 16 refs., 48 figs., 22 tabs.

  9. Office of Inspector General audit report on the U.S. Department of Energy`s aircraft activities

    SciTech Connect (OSTI)

    NONE

    1999-01-01T23:59:59.000Z

    On October 19, 1998, the Office of Inspector General (OIG) was asked to undertake a review of the Department of Energy`s aircraft activities. It was also requested that they report back within 90 days. The OIG has gathered information concerning the number of aircraft, the level of utilization, and the cost of the Department`s aircraft operations. They have also briefly summarized four issues that, in their judgment, may require management attention.

  10. Aircraft de-icer: Recycling can cut carbon emissions in half

    SciTech Connect (OSTI)

    Johnson, Eric P., E-mail: ejohnson@ecosite.co.uk

    2012-01-15T23:59:59.000Z

    Flight-safety regulations in most countries require aircraft to be ice-free upon takeoff. In icy weather, this means that the aircraft usually must be de-iced (existing ice is removed) and sometimes anti-iced (to protect against ice-reformation). For both processes, aircraft typically are sprayed with an 'antifreeze' solution, consisting mainly of glycol diluted with water. This de/anti-icing creates an impact on the environment, of which environmental regulators have grown increasingly conscious. The US Environmental Protection Agency (EPA), for example, recently introduced stricter rules that require airports above minimum size to collect de-icing effluents and send them to wastewater treatment. De-icer collection and treatment is already done at most major airports, but a few have gone one step further: rather than putting the effluent to wastewater, they recycle it. This study examines the carbon savings that can be achieved by recycling de-icer. There are two key findings. One, recycling, as opposed to not recycling, cuts the footprint of aircraft de-icing by 40-50% - and even more, in regions where electricity-generation is cleaner. Two, recycling petrochemical-based de-icer generates a 15-30% lower footprint than using 'bio' de-icer without recycling. - Highlights: Black-Right-Pointing-Pointer Carbon footprint of aircraft de-icing can be measured. Black-Right-Pointing-Pointer Recycling aircraft de-icer cuts the footprint of aircraft de-icing by 40-50%. Black-Right-Pointing-Pointer Recycling 'fossil' de-icer is lower carbon than not recycling 'bio' de-icer.

  11. Comparison of improved Aura Tropospheric Emission Spectrometer (TES) CO2 with HIPPO and SGP aircraft profile measurements

    E-Print Network [OSTI]

    Kulawik, S.S.

    2013-01-01T23:59:59.000Z

    Spectrometer stare ozone profiles with ARC-IONS sondespriori of trace gas profile estimates from the TroposphericHIPPO and SGP aircraft profile measurements S. S. Kulawik ,

  12. Extremely narrow spectrum of GRB110920A: further evidence for localised, subphotospheric dissipation

    E-Print Network [OSTI]

    Iyyani, S; Ahlgren, B; Burgess, J M; Larsson, J; Pe'er, A; Lundman, C; Axelsson, M; McGlynn, S

    2015-01-01T23:59:59.000Z

    Much evidence points towards that the photosphere in the relativistic outflow in GRBs plays an important role in shaping the observed MeV spectrum. However, it is unclear whether the spectrum is fully produced by the photosphere or whether a substantial part of the spectrum is added by processes far above the photosphere. Here we make a detailed study of the $\\gamma-$ray emission from single pulse GRB110920A which has a spectrum that becomes extremely narrow towards the end of the burst. We show that the emission can be interpreted as Comptonisation of thermal photons by cold electrons in an unmagnetised outflow at an optical depth of $\\tau \\sim 20$. The electrons receive their energy by a local dissipation occurring close to the saturation radius. The main spectral component of GRB110920A and its evolution is thus, in this interpretation, fully explained by the emission from the photosphere including localised dissipation at high optical depths.

  13. Catalyzed Water Oxidation by Solar Irradiation of Band-Gap-Narrowed Semiconductors (Part 1. Overview).

    SciTech Connect (OSTI)

    Fujita,E.; Khalifah, P.; Lymar, S.; Muckerman, J.T.; Rodgriguez, J.

    2008-03-18T23:59:59.000Z

    The objectives of this report are: (1) Investigate the catalysis of water oxidation by cobalt and manganese hydrous oxides immobilized on titania or silica nanoparticles, and dinuclear metal complexes with quinonoid ligands in order to develop a better understanding of the critical water oxidation chemistry, and rationally search for improved catalysts. (2) Optimize the light-harvesting and charge-separation abilities of stable semiconductors including both a focused effort to improve the best existing materials by investigating their structural and electronic properties using a full suite of characterization tools, and a parallel effort to discover and characterize new materials. (3) Combine these elements to examine the function of oxidation catalysts on Band-Gap-Narrowed Semiconductor (BGNSC) surfaces and elucidate the core scientific challenges to the efficient coupling of the materials functions.

  14. Narrow band wavelength selective filter using grating assisted single ring resonator

    SciTech Connect (OSTI)

    Prabhathan, P., E-mail: PPrabhathan@ntu.edu.sg; Murukeshan, V. M. [Centre for Optical and Laser Engineering (COLE), School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore)

    2014-09-15T23:59:59.000Z

    This paper illustrates a filter configuration which uses a single ring resonator of larger radius connected to a grating resonator at its drop port to achieve single wavelength selectivity and switching property with spectral features suitable for on-chip wavelength selection applications. The proposed configuration is expected to find applications in silicon photonics devices such as, on-chip external cavity lasers and multi analytic label-free biosensors. The grating resonator has been designed for a high Q-factor, high transmittivity, and minimum loss so that the wavelength selectivity of the device is improved. The proof-of-concept device has been demonstrated on a Silicon-on-Insulator (SOI) platform through electron beam lithography and Reactive Ion Etching (RIE) process. The transmission spectrum shows narrow band single wavelength selection and switching property with a high Free Spectral Range (FSR) ?60 nm and side band rejection ratio >15 dB.

  15. Kinematic Linkage Between the Broad and Narrow Line Emitting Gas in AGN

    E-Print Network [OSTI]

    R. Zamanov; P. Marziani; J. W. Sulentic; M. Calvani; D. Dultzin-Hacyan; R. Bachev

    2002-07-18T23:59:59.000Z

    We investigate the radial velocity difference between the [OIII]5007,4959 and H-beta lines for a sample of 200 low redshift AGN. We identify seven objects showing an [OIII]5007 blueshift relative to H-beta with amplitude larger than 250 km/s (blue "outliers"). These line shifts are found in sources where the broad high ionization lines (e.g. CIV1549) also show a large systematic blueshift. Such blueshifts occur only in the population A region of the Eigenvector 1 parameter domain (that also contains NLSy1 sources). We suggest that [OIII] blueshifts are also associated with the high ionization outflow originating in these sources. This is a direct kinematic linkage between narrow and broad line emitting gas.

  16. Theory of DNA translocation through narrow ion channels and nanopores with charged walls

    E-Print Network [OSTI]

    Tao Hu; B. I. Shklovskii

    2008-06-20T23:59:59.000Z

    Translocation of a single stranded DNA through genetically engineered $\\alpha$-hemolysin channels with positively charged walls is studied. It is predicted that transport properties of such channels are dramatically different from neutral wild type $\\alpha$-hemolysin channel. We assume that the wall charges compensate the fraction $x$ of the bare charge $q_{b}$ of the DNA piece residing in the channel. Our prediction are as follows (i) At small concentration of salt the blocked ion current decreases with $x$. (ii) The effective charge $q$ of DNA piece, which is very small at $x = 0$ (neutral channel) grows with $x$ and at $x=1$ reaches $q_{b}$. (iii) The rate of DNA capture by the channel exponentially grows with $x$. Our theory is also applicable to translocation of a double stranded DNA in narrow solid state nanopores with positively charged walls.

  17. Line narrowing spectroscopic studies of DNA-carcinogen adducts and DNA-dye complexes

    SciTech Connect (OSTI)

    Suh, Myungkoo

    1995-12-06T23:59:59.000Z

    Laser-induced fluorescence line narrowing and non-line narrowing spectroscopic methods were applied to conformational studies of stable DNA adducts of the 7{beta}, 8{alpha}-dihydoxy-9{alpha}, l0{alpha}-epoxy-7,8,9, 10-tetrahydrobenzo[{alpha}]pyrene (anti-BPDE). Stereochemically distinct (+)-trans-, ({minus})-trans-, (+)-cis- and ({minus})-cis adducts of anti-BPDE bound to exocyclic amino group of the central guanine in an 11-mer oligonucleotide, exist in a mixture of conformations in frozen aqueous buffer matrices. The (+)-trans adduct adopts primarily an external conformation with a smaller fraction ( {approximately} 25 %) exists in a partially base-stacked conformation. Both cis adducts were found to be intercalated with significant {pi}-{pi} stacking interactions between the pyrenyl residues and the bases. Conformations of the trans-adduct of (+)-anti -BPDE in 11-mer oligonucleotides were studied as a function of flanking bases. In single stranded form the adduct at G{sub 2} or G{sub 3} (5 ft-flanking, base guanine) adopts a conformation with strong, interaction with the bases. In contrast, the adduct with a 5ft-flanking, thymine exists in a primarily helixexternal conformation. Similar differences were observed in the double stranded oligonucleotides. The nature of the 3ft-flanking base has little influence on the conformational equilibrium of the (+)-trans-anti BPDE-dG adduct. The formation and repair of BPDE-N{sup 2}-dG in DNA isolated from the skin of mice treated topically with benzo[{alpha}]pyrene (BP) was studied. Low-temperature fluorescence spectroscopy of the intact DNA identified the major adduct as (+)-trans-anti-BPDE-N-dG, and the minor adduct fraction consisted mainly of (+)-cis-anti-BPDE-N{sup 2}-dG.

  18. Development of an ultrasonic pulse-echo (UPE) technique for aircraft icing studies

    SciTech Connect (OSTI)

    Liu, Yang; Hu, Hui [Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011 (United States); Chen, Wen-Li [Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011 (United States); School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090 (China); Bond, Leonard J. [Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011 (United States); Center for Nondestructive Evaluation, Iowa State University, 1915 Scholl Road, 151 ASC II, Ames, IA 50011 (United States)

    2014-02-18T23:59:59.000Z

    Aircraft operating in some cold weather conditions face the risk of icing. Icing poses a threat to flight safety and its management is expensive. Removing light frost on a clear day from a medium-size business jet can cost $300, heavy wet snow removal can cost $3,000 and removal of accumulated frozen/freezing rain can cost close to $10,000. Understanding conditions that lead to severe icing events is important and challenging. When an aircraft or rotorcraft flies in a cold climate, some of the super cooled droplets impinging on exposed aircraft surfaces may flow along the surface prior to freezing and give various forms and shapes of ice. The runback behavior of a water film on an aircraft affects the morphology of ice accretion and the rate of formation. In this study, we report the recent progress to develop an Ultrasonic Pulse-Echo (UPE) technique to provide real-time thickness distribution measurements of surface water flows driven by boundary layer airflows for aircraft icing studies. A series of initial experimental investigations are conducted in an ice wind tunnel employing an array of ultrasonic transducers placed underneath the surface of a flat plate. The water runback behavior on the plate is evaluated by measuring the thickness profile variation of the water film along the surface by using the UPE technique under various wind speed and flow rate conditions.

  19. Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes

    SciTech Connect (OSTI)

    Nong, Hanond, E-mail: Nong.Hanond@rub.de; Markmann, Sergej; Hekmat, Negar; Jukam, Nathan, E-mail: Nathan.Jukam@rub.de [Arbeitsgruppe Terahertz Spektroskopie und Technologie, Ruhr-Universitt Bochum, Bochum 44780 (Germany); Pal, Shovon [Arbeitsgruppe Terahertz Spektroskopie und Technologie, Ruhr-Universitt Bochum, Bochum 44780 (Germany); Lehrstuhl fr Angewandte Festkrperphysik, Ruhr-Universitt Bochum, Bochum 44780 (Germany); Mohandas, Reshma A.; Dean, Paul; Li, Lianhe; Linfield, Edmund H.; Giles Davies, A. [School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT (United Kingdom); Wieck, Andreas D. [Lehrstuhl fr Angewandte Festkrperphysik, Ruhr-Universitt Bochum, Bochum 44780 (Germany)

    2014-09-15T23:59:59.000Z

    A periodically poled lithium niobate (PPLN) crystal with multiple poling periods is used to generate tunable narrow-bandwidth THz pulses for injection seeding a quantum cascade laser (QCL). We demonstrate that longitudinal modes of the quantum cascade laser close to the gain maximum can be selected or suppressed according to the seed spectrum. The QCL emission spectra obtained by electro-optic sampling from the quantum cascade laser, in the most favorable case, shows high selectivity and amplification of the longitudinal modes that overlap the frequency of the narrow-band seed. Proper selection of the narrow-band THz seed from the PPLN crystal discretely tunes the longitudinal mode emission of the quantum cascade laser. Moreover, the THz wave build-up within the laser cavity is studied as a function of the round-trip time. When the seed frequency is outside the maximum of the gain spectrum the laser emission shifts to the preferential longitudinal mode.

  20. Extreme non-linear response of ultra-narrow optical transitions in cavity QED for laser stabilization

    E-Print Network [OSTI]

    M. J. Martin; D. Meiser; J. W. Thomsen; Jun Ye; M. J. Holland

    2011-10-23T23:59:59.000Z

    We explore the potential of direct spectroscopy of ultra-narrow optical transitions of atoms localized in an optical cavity. In contrast to stabilization against a reference cavity, which is the approach currently used for the most highly stabilized lasers, stabilization against an atomic transition does not suffer from Brownian thermal noise. Spectroscopy of ultra-narrow optical transitions in a cavity operates in a very highly saturated regime in which non-linear effects such as bistability play an important role. From the universal behavior of the Jaynes-Cummings model with dissipation, we derive the fundamental limits for laser stabilization using direct spectroscopy of ultra-narrow atomic lines. We find that with current lattice clock experiments, laser linewidths of about 1 mHz can be achieved in principle, and the ultimate limitations of this technique are at the 1 $\\mu$ Hz level.

  1. My body in the brain: a neurocognitive model of body-ownership

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    in the brain: a neurocognitive model of body- ownership. Neuropsychologia, 48(3):703-12. #12;Abstract EmpiricalMy body in the brain: a neurocognitive model of body-ownership Manos Tsakiris Department the experience of body-ownership. This review puts forward a neurocognitive model according to which body

  2. Revisiting the Aging Aircraft Nondestructive Inspection Validation Center -- A resource for the FAA and industry

    SciTech Connect (OSTI)

    Smith, C. [Federal Aviation Administration, Atlantic City, NJ (United States). FAATC Technical Center; Walter, P.L. [Sandia National Labs., Albuquerque, NM (United States)

    1995-08-01T23:59:59.000Z

    The Aging Aircraft Nondestructive Inspection Validation Center (commonly designated AANC or The Validation Center) was founded by the Federal Aviation Administration (FAA) in response to the Aviation Safety Research Act of 1988, which mandates that the FAA carry out research and develop technologies to help the aviation industry to (1) better predict the effects of design, maintenance, testing, wear and fatigue in the life of an aircraft; (2) develop methods for improving aircraft maintenance technology and practices including nondestructive inspection; and (3) expand general long range research activities applicable to aviation systems. The AANC validates NDI technology, provides a quick response capability, assesses the reliability of NDI applications, and performs other projects to support the FAA and aviation industry. Sandia National Laboratories was funded by the FAA in August 1991 to establish the Validation Center at Albuquerque International Airport.

  3. Spectrally narrowed leaky waveguide edge emission and transient electrluminescent dynamics of OLEDs

    SciTech Connect (OSTI)

    Zhengqing, Gan

    2010-05-16T23:59:59.000Z

    In summary, there are two major research works presented in this dissertation. The first research project (Chapter 4) is spectrally narrowed edge emission from Organic Light Emitting Diodes. The second project (Chapter 5) is about transient electroluminescent dynamics in OLEDs. Chapter 1 is a general introduction of OLEDs. Chapter 2 is a general introduction of organic semiconductor lasers. Chapter 3 is a description of the thermal evaporation method for OLED fabrication. The detail of the first project was presented in Chapter 4. Extremely narrowed spectrum was observed from the edge of OLED devices. A threshold thickness exists, above which the spectrum is narrow, and below which the spectrum is broad. The FWHM of spectrum depends on the material of the organic thin films, the thickness of the organic layers, and length of the OLED device. A superlinear relationship between the output intensity of the edge emission and the length of the device was observed, which is probably due to the misalignment of the device edge and the optical fiber detector. The original motivation of this research is for organic semiconductor laser that hasn't been realized due to the extremely high photon absorption in OLED devices. Although we didn't succeed in fabricating an electrically pumped organic laser diode, we made a comprehensive research in edge emission of OLEDs which provides valuable results in understanding light distribution and propagation in OLED devices. Chapter 5 focuses on the second project. A strong spike was observed at the falling edge of a pulse, and a long tail followed. The spike was due to the recombination of correlated charge pair (CCP) created by trapped carriers in guest molecules of the recombination zone. When the bias was turned off, along with the decreasing of electric field in the device, the electric field induced quenching decreases and the recombination rate of the CCP increases which result in the spike. This research project provides a profound understanding of the EL dynamics of OLED, and the theoretical model can fit and explain the experiment data quite well. For the edge emission, we focused on the spectrum and the relative intensity of the edge emission. In the future, more research can be done on the comparison of the intensity between the total edge emission and the surface emission which will give us a sense what fraction of light was trapped in the device. Micro structures can be integrated into the OLED such as DFB and DBR, the character of edge emission should be very interesting. For the transient spike, the CCP model can give a good explanation. But in the model, the effect of the electric field change is not included, because from the start point (t=0), we assume the mobility of carriers is a constant. If we consider the details of the change of the electric field, then when turning of the bias, the decrease of the electric field results in decrease of the carrier mobility and the dissociation rate. If we can add the electric field effect into the model, the whole theory will be more convincing.

  4. 60GHz Wireless Nano-Sensors Network for Structure Health Monitoring as Enabler for Safer, Greener Aircrafts

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    60GHz Wireless Nano-Sensors Network for Structure Health Monitoring as Enabler for Safer, Greener-objects for Structure Health Monitoring in the aircrafts and the improvements bring by the nanotechnologies. The main the cabin of an aircraft and the choice of the network architecture. Keywords: Structure Health Monitoring

  5. Abstract--This paper presents a vision-based navigation solution for unmanned aircraft operations on airfield surfaces

    E-Print Network [OSTI]

    Frew, Eric W.

    Hawk, significant effort is required to survey each airfield at which the UAS will operate, and to specify detailedAbstract--This paper presents a vision-based navigation solution for unmanned aircraft operations on airfield surfaces in GPS-denied environments. The Unmanned Aircraft System Ground Operations Management

  6. Atmospheric CO{sub 2} concentrations the CSIRO (Australia) monitoring program from aircraft 1972 - 1981

    SciTech Connect (OSTI)

    Beardsmore, D.J.; Pearman, G.I. [Commonwealth Scientific Industrial Research Organization (CSIRO), Victoria (Australia). Division of Atmospheric Research

    1984-09-01T23:59:59.000Z

    Atmospheric CO{sub 2} concentrations were measured in the troposphere and lower stratosphere over the Australia-New Zealand region and as far south as Antarctica for the period 1972-1981. The samples were collected from aircraft over a large range of latitudes and altitudes. The sampling program has been based on the cooperation of the Australia Department of Transport, Quantas Airways, Trans Australia Airlines, the United States, New Zealand and Australian Air Forces and occasional chartering of light aircraft for special purposes.

  7. Pollution from motor vehicles and aircraft at Stapleton International Airport (abbreviated report)

    SciTech Connect (OSTI)

    Segal, H.M.

    1987-04-01T23:59:59.000Z

    The air-quality impact of the proposed runaway expansion program at Stapleton International Airport is determined in this report. The method of analysis is to model the dispersion of pollutants from motor vehicles and aircraft under both 1-hour and 8-hour worst-case conditions. Results show that aircraft pollution concentrations are reduced and, in some cases, completely disappear when the new runaways are added. This is caused primarily by a reduction in takeoff delays, which are a major objective of the runaway-expansion programs at the report.

  8. Pollution from motor vehicles and aircraft at Stapleton International Airport (abbreviated report). Revision 2

    SciTech Connect (OSTI)

    Segal, H.M.

    1987-09-01T23:59:59.000Z

    The air-quality impact of the proposed runway-expansion program at Stapleton International Airport is determined in this report. The method of analysis is to model the dispersion of pollutants from motor vehicles and aircraft under both 1-hour and 8-hour worst-case conditions. Results show that aircraft pollution concentrations are reduced and, in some cases, completely disappear when the new runways are added. This is caused primarily by a reduction in takeoff delays, which are major objective of the runway-expansion program at the airport.

  9. Spontaneous Emission Near Superconducting Bodies

    E-Print Network [OSTI]

    Bo-Sture K. Skagerstam; Per Kristian Rekdal

    2007-06-07T23:59:59.000Z

    In the present paper we study the spontaneous photon emission due to a magnetic spin-flip transition of a two-level atom in the vicinity of a dielectric body like a normal conducting metal or a superconductor. For temperatures below the transition temperature T_c of a superconductor, the corresponding spin-flip lifetime is boosted by several orders of magnitude as compared to the case of a normal conducting body. Numerical results of an exact formulation are also compared to a previously derived approximative analytical expression for the spin-flip lifetime and we find an excellent agreement. We present results on how the spin-flip lifetime depends on the temperature T of a superconducting body as well as its thickness H. Finally, we study how non-magnetic impurities as well as possible Eliashberg strong-coupling effects influence the spin-flip rate. It is found that non-magnetic impurities as well as strong-coupling effects have no dramatic impact on the spin-flip lifetime.

  10. An evaluation of total body electrical conductivity to estimate body composition of largemouth bass

    E-Print Network [OSTI]

    Barziza, Daniel Eugene

    1998-01-01T23:59:59.000Z

    Information about body composition of fish is important for the assessment and management of fish stocks. Measurement of total body electrical conductivity (TOBEC) recently has been used to estimate the body composition of several fish species in a...

  11. NARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw Ronald C. Arkin

    E-Print Network [OSTI]

    in the semistructured environment found in a hazardous waste storage facility, a sensor system should useNARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw it to a system more suitable for actual deployment on a robot. Routine monitoring of stored radioactive materials

  12. NARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw Ronald C. Arkin

    E-Print Network [OSTI]

    in the semi-structured environment found in a hazardous waste storage facility, a sensor system should useNARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw it to a system more suitable for actual deployment on a robot. Routine monitoring of stored radioactive materials

  13. Insecticide Exposures on Commercial Aircraft: A Literature Review and Screening Level Assessment

    SciTech Connect (OSTI)

    Maddalena, Randy I.; McKone, Thomas E.

    2008-10-01T23:59:59.000Z

    The objective of this project was to provide initial estimates of the relationship between insecticide use on passenger aircraft and exposure levels present in the cabin environment. The work was initially divided into three tasks including 1) a review of insecticide application practices in commercial aircraft, 2) exploratory measurements of insecticide concentrations in treated aircraft and 3) screening level exposure modeling. Task 1 gathered information that is needed to assess the time-concentration history of insecticides in the airline cabin. The literature review focused on application practices, information about the cabin environment and existing measurements of exposure concentrations following treatment. Information from the airlines was not available for estimating insecticide application rates in the U.S. domestic fleet or for understanding how frequently equipment rotate into domestic routes following insecticide treatment. However, the World Health Organization (WHO) recommends several methods for treating aircraft with insecticide. Although there is evidence that these WHO guidelines may not always be followed, and that practices vary by airline, destination, and/or applicator company, the guidelines in combination with information related to other indoor environments provides a plausible basis for estimating insecticide loading rates on aircraft. The review also found that while measurements of exposure concentrations following simulated aerosol applications are available, measurements following residual treatment of aircraft or applications in domestic aircraft are lacking. Task 2 focused on developing an approach to monitor exposure concentrations in aircraft using a combination of active and passive sampling methods. An existing active sampling approach was intended to provide data immediately following treatment while a passive sampler was developed to provide wider coverage of the fleet over longer sampling periods. The passive sampler, based on a thin-film polymer-coated glass design, was developed specifically for deployment in the airliner ventilation system for long-term unattended monitoring of insecticide loading in the aircraft. Because access was not available for either treated aircraft or treatment records during the course of this study, the development and calibration of the passive samplers was halted prior to completion. Continued development of a field ready passive sampler for insecticides in aircraft would require collaboration with the airline industry to finalize the method for deployment and calibration conditions for the sampler. The Task 3 screening level modeling assessment used a dynamic two-box mass balance model that includes treated surfaces and air to explore the time-concentration history of insecticides in the cabin. The model was parameterized using information gathered during the literature review and run for several different insecticide use scenarios. Chemical degradation or sequestration in the surface compartment and mass transfer from the surface to the air limit the rate at which insecticides are removed from the system. This rate limiting process can result in an accumulation of insecticide in the airliner cabin following repeated applications. The extent of accumulation is a function of the overall persistence of the chemical in the system and the amount of chemical applied during each treatment.

  14. Picoelectrospray Ionization Mass Spectrometry Using Narrow-bore Chemically Etched Emitters

    SciTech Connect (OSTI)

    Marginean, Ioan; Tang, Keqi; Smith, Richard D.; Kelly, Ryan T.

    2014-01-01T23:59:59.000Z

    Electrospray ionization mass spectrometry (ESI-MS) at flow rates below ~10 nL/min has been only sporadically explored due to difficulty in reproducibly fabricating emitters that can operate at lower flow rates. Here we demonstrate narrow orifice chemically etched emitters for stable electrospray at flow rates as low as 400 pL/min. Depending on the analyte concentration, we observe two types of MS signal response as a function of flow rate. At low concentrations, an optimum flow rate is observed slightly above 1 nL/min, while the signal decreases monotonically with decreasing flow rates at higher concentrations. In spite of lower MS signal, the ion utilization efficiency increases exponentially with decreasing flow rate in all cases. No unimolecular response was observed within this flow rate range during the analysis of an equimolar mixture of peptides, indicating that ionization efficiency is an analyte-dependent characteristic in given experimental conditions. While little to no gain in signal-to-noise was achieved at ultralow flow rates for concentration-limited analyses, experiments consuming the same amount of analyte suggest that mass-limited analyses will benefit strongly from the use of low flow rates and avoiding unnecessary sample dilution. By operating under optimal conditions, consumption of just 500 zmol of sample yielded signal-to-noise ratios ~10 for some peptides. These findings have important implications for the analysis of trace biological samples.

  15. Galaxy formation at z > 3 revealed by narrow-band selected [OIII] emission line galaxies

    E-Print Network [OSTI]

    Suzuki, Tomoko L; Tadaki, Ken-ichi; Hayashi, Masao; Koyama, Yusei; Tanaka, Ichi; Minowa, Yosuke; Shimakawa, Rhythm; Yamamoto, Moegi

    2015-01-01T23:59:59.000Z

    We present the physical properties of [OIII] emission line galaxies at z>3 as the tracers of active galaxies at 1Gyr before the peak epoch at z~2. We have performed deep narrow-band imaging surveys in the Subaru/XMM-Newton Deep Survey Field with MOIRCS on the Subaru Telescope and have constructed coherent samples of 34 [OIII] emitters at z=3.2 and 3.6, as well as 107 H$\\alpha$ emitters at z=2.2 and 2.5. We investigate their basic physical quantities, such as stellar masses, star formation rates (SFRs), and sizes using the publicly available multi-wavelength data and high resolution images by the Hubble Space Telescope. The stellar masses and SFRs show a clear correlation known as the "main sequence" of star-forming galaxies. It is found that the location of the main sequence of the [OIII] emitters at z=3.2 and 3.6 is almost identical to that of the H$\\alpha$ emitters at z=2.2 and 2.5. Also, we investigate their mass-size relation and find that the relation does not change between the two epochs. When we assum...

  16. Intensity dependence narrowing of electromagnetically induced absorption in a Doppler-broadened medium

    SciTech Connect (OSTI)

    Dimitrijevic, J.; Arsenovic, D.; Jelenkovic, B. M. [Institute of Physics, 11080 Belgrade (Serbia)

    2007-07-15T23:59:59.000Z

    In this paper, we present a theoretical model for studying the interaction between linearly polarized laser light and near-degenerated Zeeman sublevels for a multiple V-type atomic system of {sup 2}S{sub 1/2}F{sub g}=2{yields}{sup 2}P{sub 3/2}F{sub e}=3 transition in {sup 87}Rb. We have calculated the laser absorption in a Hanle configuration, as well as the amplitudes and the widths of electromagnetically induced absorption (EIA) in the range of laser intensities from 0.01 to 40 mW/cm{sup 2}. Our results, showing nonvanishing EIA amplitude, a nonmonotonic increase of the EIA width for the increase of laser intensity, and pronounced shape differences of the Hanle EIA curves at different laser intensities, are in good agreement with recent experimental results. We have found that the EIA behaves differently than the electromagnetically induced transparency (EIT) as a function of the laser intensity. Both the amplitude and width of the EIA have narrow maximums at 1 to 2 mW/cm{sup 2}. We have shown the strong influence of Doppler broadening of atomic transition on Hanle resonances and have suggested the explanation of it.

  17. Narrow Bandgap in beta-BaZn2As2 and Its Chemical Origins

    E-Print Network [OSTI]

    Xiao, Zewen; Ueda, Shigenori; Toda, Yoshitake; Ran, Fan-Yong; Guo, Jiangang; Lei, Hechang; Matsuishi, Satoru; Hosono, Hideo; Kamiya, Toshio

    2015-01-01T23:59:59.000Z

    Beta-BaZn2As2 is known to be a p-type semiconductor with the layered crystal structure similar to that of LaZnAsO, leading to the expectation that beta-BaZn2As2 and LaZnAsO have similar bandgaps; however, the bandgap of beta-BaZn2As2 (previously-reported value ~0.2 eV) is one order of magnitude smaller than that of LaZnAsO (1.5 eV). In this paper, the reliable bandgap value of beta-BaZn2As2 is determined to be 0.23 eV from the intrinsic region of the tem-perature dependence of electrical conductivity. The origins of this narrow bandgap are discussed based on the chemi-cal bonding nature probed by 6 keV hard X-ray photoemission spectroscopy, hybrid density functional calculations, and the ligand theory. One origin is the direct As-As hybridization between adjacent [ZnAs] layers, which leads to a secondary splitting of As 4p levels and raises the valence band maximum. The other is that the non-bonding Ba 5dx2-y2 orbitals form unexpectedly deep conduction band minimum (CBM) in beta-BaZn2As2 although the CBM of L...

  18. Optic for industrial endoscope/borescope with narrow field of view and low distortion

    DOE Patents [OSTI]

    Stone, Gary F.; Trebes, James E.

    2005-08-16T23:59:59.000Z

    An optic for the imaging optics on the distal end of a flexible fiberoptic endoscope or rigid borescope inspection tool. The image coverage is over a narrow (<20 degrees) field of view with very low optical distortion (<5% pin cushion or barrel distortion), compared to the typical <20% distortion. The optic will permit non-contact surface roughness measurements using optical techniques. This optic will permit simultaneous collection of selected image plane data, which data can then be subsequently optically processed. The image analysis will yield non-contact surface topology data for inspection where access to the surface does not permit a mechanical styles profilometer verification of surface topology. The optic allows a very broad spectral band or range of optical inspection. It is capable of spectroscopic imaging and fluorescence induced imaging when a scanning illumination source is used. The total viewing angle for this optic is 10 degrees for the full field of view of 10 degrees, compared to 40-70 degrees full angle field of view of the conventional gradient index or GRIN's lens systems.

  19. Anomalous diameter dependence of thermal transport in ultra-narrow Si nanowires

    SciTech Connect (OSTI)

    Karamitaheri, Hossein, E-mail: karami@iue.tuwien.ac.at [Institute for Microelectronics, TU Wien, Guhausstrae 27-29/E360, A-1040 Wien (Austria); Department of Electrical Engineering, University of Kashan, Kashan, 87317-51167 (Iran, Islamic Republic of); Neophytou, Neophytos, E-mail: neophytou@iue.tuwien.ac.at [Institute for Microelectronics, TU Wien, Guhausstrae 27-29/E360, A-1040 Wien (Austria); School of Engineering, University of Warwick, Coventry CV4 7AL (United Kingdom); Kosina, Hans, E-mail: kosina@iue.tuwien.ac.at [Institute for Microelectronics, TU Wien, Guhausstrae 27-29/E360, A-1040 Wien (Austria)

    2014-01-14T23:59:59.000Z

    We present atomistic valence force field calculations of thermal transport in Si nanowires of diameters from 12?nm down to 1?nm. We show that as the diameter is reduced, the phonon density-of-states and transmission function acquire a finite value at low frequency, in contrast to approaching zero as in the bulk material. It turns out that this effect results in what Ziman described as the problem of long longitudinal waves [J. M. Ziman, Electrons and Phonons: The Theory of Transport Phenomena in Solids (Clarendon, Oxford, 1962)], which states that the thermal conductivity of a material increases as its length is increased due to the vanishing scattering for long-wavelength phonons. We show that this thermal transport improvement also appears in nanowires as their diameter is decreased below D?=?5?nm (not only as the length increases), originating from the increase in the density of the long wavevector modes. The observation is present under ballistic transport conditions, and further enhanced with the introduction of phonon-phonon scattering. Because of this, in such ultra-narrow nanowires, as the diameter is reduced, phonon transport is dominated more and more by lower energy phonons with longer mean-free paths. We show that ?80% of the heat is carried by phonons with energies less than 5?meV, most with mean-free paths of several hundreds of nanometers.

  20. The Host Galaxies and Narrow Line Regions of Four Double-Peaked [OIII] AGN

    E-Print Network [OSTI]

    Villforth, C

    2015-01-01T23:59:59.000Z

    Major gas-rich mergers of galaxies are expected to play an important role in triggering and fuelling luminous AGN. We present deep multi-band (u/r/z) imaging and long slit spectroscopy of four double-peaked [OIII] emitting AGN, a class of objects associated with either kcp-separated binary AGN or final stage major mergers, though AGN with complex narrow-line regions are known contaminants. Such objects are of interest since they represent the onset of AGN activity during the merger process. Three of the objects studied have been confirmed as major mergers using near-infrared imaging, one is a confirmed X-ray binary AGN. All AGN are luminous and have redshifts of 0.1 < z < 0.4. Deep r-band images show that a majority (3/4) of the sources have disturbed host morphologies and tidal features, while the remaining source is morphologically undisturbed down to low surface brightness limits. The lack of morphological disturbances in this galaxy despite the fact that is is a close binary AGN suggests that the me...

  1. Study of Gravitational Lens Chromaticity from Ground-based Narrow Band Photometry

    E-Print Network [OSTI]

    Mosquera, Ana M; Mediavilla, Evencio; Kochanek, Christopher S

    2010-01-01T23:59:59.000Z

    We present observations of wavelength-dependent flux ratios for 4 gravitational lens systems (SDSS~J1650+4251, HE~0435$-$1223, FBQ 0951+2635, and Q~0142$-$100) obtained with the Nordic Optical telescope (NOT). The use of narrow band photometry, as well as the excellent seeing conditions during the observations, allow us to set good baselines to study their chromatic behavior. For SDSS~J1650+4251 we determine the extinction curve of the dust in the $z_L=0.58$ lens galaxy, and find that the 2175 \\AA \\ feature is absent. In the case of HE~0435$-$1223 we clearly detect chromatic microlensing. This allows us to estimate the wavelength dependent size of the accretion disk. We found an R-band disk size of $r^{R}_s=13\\pm5$ light days for a linear prior on $r^{R}_s$ and of $r^{R}_s=7\\pm6$ light days for a logarithmic prior. For a power law size-wavelength scaling of $r_s\\propto\\lambda^{p}$, we were able to constrain the value of the exponent to $p=1.3\\pm0.3$ for both $r^{R}_s$ priors, which is in agreement with the te...

  2. The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings

    E-Print Network [OSTI]

    R. P. Deo; D. M. Crenshaw; S. B. Kraemer

    2006-03-29T23:59:59.000Z

    We present a study of the nuclear morphology of a sample of narrow- and broad-line Seyfert 1 galaxies (NLS1's and BLS1's) based on broad-band images in the Hubble Space Telescope archives. In our previous study, we found that large-scale stellar bars at > 1 kpc from the nucleus are more common in NLS1's than BLS1's. In this paper we find that NLS1's preferentially have grand-design dust spirals within approx. 1 kpc of their centers. We also find that NLS1's have a higher fraction of nuclear star-forming rings than BLS1's. We find that many of the morphological differences are due to the presence or absence of a large-scale stellar bar within the spiral host galaxy. In general, barred Seyfert 1s tend to have grand-design dust spirals at their centers, confirming the results of other researchers. The high fraction of grand-design nuclear dust spirals and stellar nuclear rings observed in NLS1's host galaxies suggests a means for efficient fueling of their nuclei to support their high Eddington ratios.

  3. A narrow window of Rabi frequency for competition between electromagnetically induced transparency and Raman absorption

    SciTech Connect (OSTI)

    Chang, Ray-Yuan; Fang, Wei-Chia; Lee, Ming-Tsung; He, Zong-Syun; Ke, Bai-Cian [Department of Physics, National Cheng-Kung University, Tainan 70101, Taiwan (China); Lee, Yi-Chi [Institute of Electro-Optical Science and Engineering, National Cheng-Kung University, Tainan 70101, Taiwan (China); Tsai, Chin-Chun [Department of Physics, National Cheng-Kung University, Tainan 70101, Taiwan (China); Institute of Electro-Optical Science and Engineering, National Cheng-Kung University, Tainan 70101, Taiwan (China)

    2010-01-15T23:59:59.000Z

    This investigation clarifies the transition phenomenon between the electromagnetically induced transparency (EIT) and Raman absorption in a ladder-type system of Doppler-broadened cesium vapor. A competition window of this transition was found to be as narrow as 2 MHz defined by the probe Rabi frequency. For a weak probe, the spectrum of EIT associated with quantum interference suggests that the effect of the Doppler velocity on the spectrum is negligible. When the Rabi frequency of the probe becomes comparable with the effective decay rate, an electromagnetically induced absorption (EIA) dip emerges at the center of the power broadened EIT peak. While the Rabi frequency of the probe exceeds the effective decay rate, decoherence that is generated by the intensified probe field occurs and Raman absorption dominates the interaction process, yielding a pure absorption spectrum; the Doppler velocity plays an important role in the interaction. A theory that is based on density matrix simulation, with or without the Doppler effect, can qualitatively fit the experimental data. In this work, the coherence of atom-photon interactions is created or destroyed using the probe Rabi frequency as a decoherence source.

  4. Accretion/Jet Activity and Narrow [O III] Kinematics in Young Radio Galaxies

    E-Print Network [OSTI]

    Wu, Qingwen; Humphrey, Andrew

    2009-01-01T23:59:59.000Z

    We estimate black hole masses and Eddington ratios for a sample of 81 young radio galaxies (42 CSS +39 GPS). We find that the average black hole (BH) mass of these young radio galaxies is ~8.3, which is less than that of radio loud QSOs and low redshift radio galaxies. The CSS/GPS sources have relatively high Eddington ratios, with an average value of =-0.75, which are similar to those of narrow line Seyfert 1 galaxies (NLS1s). This suggests that young radio galaxies may not only be in the early stages of their radio activity, but also in the early stage of their accretion activity. We find that the young radio galaxies as a class deviate systematically from M_bh-\\sigma relation defined by nearby inactive galaxies, when using [O III] as a surrogate for stellar velocity dispersion, \\sigma_* . We also find that the deviation of the [O III] line width is correlated with the Eddington ratio and sources with Lbol/LEdd~1 have the largest deviations, which are similar to those of radio quiet QSOs/NLS1s (radio jets i...

  5. Interference effects of neutral MSSM Higgs bosons with a generalised narrow-width approximation

    E-Print Network [OSTI]

    Elina Fuchs

    2014-11-19T23:59:59.000Z

    Mixing effects in the MSSM Higgs sector can give rise to a sizeable interference between the neutral Higgs bosons. On the other hand, factorising a more complicated process into production and decay parts by means of the narrow-width approximation (NWA) simplifies the calculation. The standard NWA, however, does not account for interference terms. Therefore, we introduce a generalisation of the NWA (gNWA) which allows for a consistent treatment of interference effects between nearly mass-degenerate particles. Furthermore, we apply the gNWA at the tree and 1-loop level to an example process where the neutral Higgs bosons $h$ and $H$ are produced in the decay of a heavy neutralino and subsequently decay into a fermion pair. The $h-H$ propagator mixing is found to agree well with the approximation of Breit-Wigner propagators times finite wave-function normalisation factors, both leading to a significant interference contribution. The factorisation of the interference term based on on-shell matrix elements reproduces the full interference result within a precision of better than 1% for the considered process. The gNWA also enables the inclusion of contributions beyond the 1-loop order into the most precise prediction.

  6. The parent population of flat-spectrum radio-loud Narrow-Line Seyfert 1 galaxies

    E-Print Network [OSTI]

    Berton, Marco; Ciroi, Stefano; Cracco, Valentina; La Mura, Giovanni; Lister, Matthew L; Mathur, Smita; Peterson, Bradley M; Richards, Joseph L; Rafanelli, Piero

    2015-01-01T23:59:59.000Z

    Flat-spectrum radio-loud Narrow-Line Seyfert 1 galaxies (NLS1s) are a recently discovered class of $\\gamma$-ray emitting Active Galactic Nuclei (AGN), that exhibit some blazar-like properties which are explained with the presence of a relativistic jet viewed at small angles. When blazars are observed at larger angles they appear as radio-galaxies, and we expect to observe an analogue parent population for beamed NLS1s. However, the number of known NLS1s with the jet viewed at large angles is not enough. Therefore, we tried to understand the origin of this deficit. Current hypotheses about the nature of parent sources are steep-spectrum radio-loud NLS1s, radio-quiet NLS1s and disk-hosted radio-galaxies. To test these hypotheses we built three samples of candidate sources plus a control sample, and calculated their black hole mass and Eddington ratio using their optical spectra. We then performed a Kolmogorov-Smirnov statistical test to investigate the compatibility of our different samples with a beamed popula...

  7. Observation of a new narrow axial-vector meson $a_1(1420)$

    E-Print Network [OSTI]

    C. Adolph; R. Akhunzyanov; M. G. Alexeev; G. D. Alexeev; A. Amoroso; V. Andrieux; V. Anosov; A. Austregesilo; C. Azevedo; B. Badelek; F. Balestra; J. Barth; R. Beck; Y. Bedfer; J. Bernhard; K. Bicker; E. R. Bielert; R. Birsa; J. Bisplinghoff; M. Bodlak; M. Boer; P. Bordalo; F. Bradamante; C. Braun; A. Bressan; M. Buechele; E. Burtin; W. -C. Chang; M. Chiosso; I. Choi; S. U. Chung; A. Cicuttin; M. L. Crespo; Q. Curiel; S. Dalla Torre; S. S. Dasgupta; S. Dasgupta; O. Yu. Denisov; L. Dhara; S. V. Donskov; N. Doshita; W Duennweber; V. Duic; M. Dziewiecki; A. Efremov; P. D. Eversheim; W. Eyrich; M. Faessler; A. Ferrero; M. Finger; M. Finger jr.; H. Fischer; C. Franco; N. du Fresne von Hohenesche; J. M. Friedrich; V. Frolov; F. Gautheron; O. P. Gavrichtchouk; S. Gerassimov; I. Gnesi; M. Gorzellik; S. Grabmueller; A. Grasso; M. Grosse-Perdekamp; B. Grube; T. Grussenmeyer; A. Guskov; F. Haas; D. Hahne; D. von Harrach; R. Hashimoto; F. H. Heinsius; F. Herrmann; F. Hinterberger; N. Horikawa; N. d'Hose; C. -Yu Hsieh; S. Huber; S. Ishimoto; A. Ivanov; Yu. Ivanshin; T. Iwata; R. Jahn; V. Jary; P. Joerg; R. Joosten; E. Kabuss; B. Ketzer; G. V. Khaustov; Yu. A. Khokhlov; Yu. Kisselev; F. Klein; K. Klimaszewski; J. H. Koivuniemi; V. N. Kolosov; K. Kondo; K. Koenigsmann; I. Konorov; V. F. Konstantinov; A. M. Kotzinian; O. Kouznetsov; M. Kraemer; P. Kremser; F. Krinner; Z. V. Kroumchtein; N. Kuchinski; F. Kunne; K. Kurek; R. P. Kurjata; A. A. Lednev; A. Lehmann; M. Levillain; S. Levorato; J. Lichtenstadt; A. Maggiora; A. Magnon; N. Makins; N. Makke; G. K. Mallot; C. Marchand; A. Martin; J. Marzec; J. Matousek; H. Matsuda; T. Matsuda; G. Meshcheryakov; W. Meyer; T. Michigami; Yu. V. Mikhailov; Y. Miyachi; A. Nagaytsev; T. Nagel; F. Nerling; D. Neyret; V. I. Nikolaenko; J. Novy; W. -D. Nowak; A. S. Nunes; A. G. Olshevsky; I. Orlov; M. Ostrick; D. Panzieri; B. Parsamyan; S. Paul; J. -C. Peng; F. Pereira; M. Pesek; D. V. Peshekhonov; S. Platchkov; J. Pochodzalla; V. A. Polyakov; J. Pretz; M. Quaresma; C. Quintans; S. Ramos; C. Regali; G. Reicherz; C. Riedl; E. Rocco; N. S. Rossiyskaya; D. I. Ryabchikov; A. Rychter; V. D. Samoylenko; A. Sandacz; C. Santos; S. Sarkar; I. A. Savin; G. Sbrizzai; P. Schiavon; K. Schmidt; H. Schmieden; K. Schoenning; S. Schopferer; T. Schlueter; A. Selyunin; O. Yu. Shevchenko; L. Silva; L. Sinha; S. Sirtl; M. Slunecka; F. Sozzi; A. Srnka; M. Stolarski; M. Sulc; H. Suzuki; A. Szabelski; T. Szameitat; P. Sznajder; S. Takekawa; J. ter Wolbeek; S. Tessaro; F. Tessarotto; F. Thibaud; V. Tskhay; S. Uhl; J. Veloso; M. Virius; S. Wallner; T. Weisrock; M. Wilfert; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki; A. Zink

    2015-01-23T23:59:59.000Z

    The COMPASS collaboration at CERN has measured diffractive dissociation of 190 GeV$/c$ pions into the $\\pi^-\\pi^-\\pi^+$ final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of $3\\pi$ mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88~waves. A narrow $J^{PC} = 1^{++}$ signal is observed in the $f_0(980)\\,\\pi$ channel. We present a resonance-model study of a subset of the spin-density matrix selecting $3\\pi$ states with $J^{PC} = 2^{++}$ and $4^{++}$ decaying into $\\rho(770)\\,\\pi$ and with $J^{PC} = 1^{++}$ decaying into $f_0(980)\\,\\pi$. We identify a new $a_1$ meson with mass $(1414^{+15}_{-13})$ MeV$/c^2$ and width $(153^{+8}_{-23})$ MeV$/c^2$. Within the final states investigated in our analysis, we observe the new $a_1(1420)$ decaying only into $f_0(980)\\,\\pi$, suggesting its exotic nature. To our knowledge, such a state has never been predicted.

  8. Metal stub and ceramic body electrode assembly

    DOE Patents [OSTI]

    Rolf, R.L.

    1984-05-22T23:59:59.000Z

    An electrically conductive ceramic electrode body having an opening therein is threadably engaged with a metal stub having at least a slot therein to provide space for expansion of the stub without damage to the electrode body. 3 figs.

  9. The structure of many-body entanglement

    E-Print Network [OSTI]

    Swingle, Brian Gordon

    2011-01-01T23:59:59.000Z

    In this thesis we discuss the general spatial structure of quantum entanglement in local many-body systems. A central theme is the organizing power of the renormalization group for thinking about many-body entanglement. ...

  10. Quantifying wet scavenging processes in aircraft observations of nitric acid and cloud condensation nuclei

    E-Print Network [OSTI]

    Palmer, Paul

    Quantifying wet scavenging processes in aircraft observations of nitric acid and cloud condensation indicator for quantifying wet scavenging. Specifically, nitric acid (HNO3), produced as a by-product of combustion, is highly soluble and removed efficiently from clouds by rain. Regional carbon monoxide (CO

  11. Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    41 Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring ends with a conceptual design of a structural health monitoring system and suggestions for aging damage detection structural health monitoring failure prevention ultrasonics pulse-echo emitter

  12. Simulations of Ozone Distributions in an Aircraft Cabin Using Computational Fluid1 Aakash C. Rai1

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    Simulations of Ozone Distributions in an Aircraft Cabin Using Computational Fluid1 Dynamics2 3 10 Ozone is a major pollutant of indoor air. Many studies have demonstrated the adverse health effect of11 ozone and the byproducts generated as a result of ozone-initiated reactive chemistry

  13. CIT Group Inc., 2011. All Rights Reserved. Overview of the Aircraft Leasing Industry

    E-Print Network [OSTI]

    held for sale; data as of 9/30/2010 Excludes liquidating Consumer Segment with portfolio assets of $9B: Loans Leases Fractional Share Financing Customer base primarily corporate users Expanding scope, Connecticut, Los Angeles, Chicago. CIT Transportation Leveraged Finance Commercial Airlines Business Aircraft

  14. Aircraft Integrity and Reliability Carlos Ferregut 1 , Roberto A. Osegueda 1 , Yohans Mendoza 1 ,

    E-Print Network [OSTI]

    Kreinovich, Vladik

    @unm.edu Abstract. In his recent paper ``Probability theory needs an infusion of fuzzy logic to enhance its ability to deal with real­world problems'', L. A. Zadeh explains that probability theory needs an infusion of a real­world problem for which such an infusion is indeed successful: the problems of aircraft integrity

  15. Performance Analysis of STOVL Aircraft Nozzle in Hover Frank K. Lu*

    E-Print Network [OSTI]

    Texas at Arlington, University of

    the gross thrust coefficient as a function of nozzle pressure and nozzle area ratios. The analysis is sup- sion system and nacelle, and to employing a variable geometry nozzle system to deflect the thrust1 Performance Analysis of STOVL Aircraft Nozzle in Hover Frank K. Lu* University of Texas

  16. Dynamic State Estimation in Distributed Aircraft Electric Control Systems via Adaptive Submodularity

    E-Print Network [OSTI]

    Xu , Huan

    exists on diagnostics of electric power systems focusing on AC systems [5], as well as large vehicle industry signifies progress in the direction of more energy efficient vehicles. Electric systems are replac, the flight-criticality of an aircraft becomes more dependent on the electric power system as well. Because

  17. Biomass burning emission inventory with daily resolution: Application to aircraft observations of Asian outflow

    E-Print Network [OSTI]

    Palmer, Paul

    Biomass burning emission inventory with daily resolution: Application to aircraft observations for biomass burning using AVHRR satellite observations of fire activity corrected for data gaps and scan angle biomass burning in SE Asia was a major contributor to the outflow of Asian pollution observed in TRACE

  18. Evaluation of transient agility metrics through unmanned simulation of the X-31 post-stall aircraft

    E-Print Network [OSTI]

    Fischer, Shiloh Douglas

    1996-01-01T23:59:59.000Z

    measure, the pitch impulse metric, is developed and simulated on the X-3 IA to describe an aircraft's balance of maximum load factor generation and maintenance during a pitch maneuver. High and low AOA lateral agility tests also show improved roll...

  19. Application of dynamic programming approach to aircraft take-off in a windshear

    E-Print Network [OSTI]

    Turova, Varvara

    speed relative to wind aircraft speed relative to ground relative path inclination angle of attack liftdrag;thrust; (1) (2) #12;Forces Thrust: Drag: Lift: 10 #12;Wind (microburst) 11 #12;Microburst: Model 1 in the presence of wind disturbances, Izv. Ross. Akad. Nauk, Tekhn. Kibernet., no. 1, 68-76, 1993 (in Russian

  20. Prepared by: Shawn Coyle, Aircraft Certification, Flight Test. Transport Canada, Ottawa, Ontario.

    E-Print Network [OSTI]

    Ladkin, Peter B.

    of an identified quality control or other mandated, regulated process on the data once it leaves the National and Security Scurit et sret Canada #12;FMSDB2.DOC 6/5/97ii Executive Summary Aircraft equipped with Flight Management Systems (FMS) and Global Positioning System (GPS1) receivers currently use these devices

  1. Ionospheric Threat Parameterization for Local Area Global-Positioning-System-Based Aircraft Landing Systems

    E-Print Network [OSTI]

    Stanford University

    Ionospheric Threat Parameterization for Local Area Global-Positioning-System-Based Aircraft Landing of user separation. The method of data analysis that produced these results is described, and a threat space that parameterizes these possible threats to user integrity is defined. Certain configurations

  2. Aircraft Microphysical Documentation from Cloud Base to Anvils of Hailstorm Feeder Clouds in Argentina

    E-Print Network [OSTI]

    Daniel, Rosenfeld

    in Argentina DANIEL ROSENFELD The Hebrew University of Jerusalem, Jerusalem, Israel WILLIAM L. WOODLEY Woodley, Argentina, with a cloud-physics jet aircraft penetrating the major feeder clouds from cloud base to the 45°C. Introduction The province of Mendoza in western Argentina (32°S, 68°W), which is known worldwide for its wine

  3. Power systems and requirements for integration of smart structures into aircraft

    E-Print Network [OSTI]

    Lindner, Douglas K.

    Power systems and requirements for integration of smart structures into aircraft Allen J. Lockyer performance improvement, however, integration system impacts have yet to be determined or quantified. Power systems to support smart structures initiatives are the focus of the current paper. The paper has been

  4. A UAV motor denoising technique to improve localization of surrounding noisy aircrafts: proof of

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    task because of the low signal to noise ratio (SNR) due to wind, vibration and own propeller noiseA UAV motor denoising technique to improve localization of surrounding noisy aircrafts: proof on active propulsion using propellers or jets, they emit noise which reveals their presence and position

  5. Distributed 3D Navigation and Collision Avoidance for Nonholonomic Aircraft-like Vehicles

    E-Print Network [OSTI]

    Dimarogonas, Dimos

    Vehicles (AUVs) and Unmanned Aerial Vehicles (UAVs), or automated Air Traffic Control (ATC) in general, Massachusetts Institute of Technology, Cambridge, MA, U.S.A. ddimar@mit.edu underwater vehicles, the aboveDistributed 3D Navigation and Collision Avoidance for Nonholonomic Aircraft-like Vehicles Giannis P

  6. Damage Identification in Aging Aircraft Structures with Piezoelectric Wafer Active Sensors

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    Damage Identification in Aging Aircraft Structures with Piezoelectric Wafer Active Sensors VICTOR of structural damage such as fatigue cracks and corrosion. Two main detection strategies are considered: (a) the wave propagation method for far-field damage detection; and (b) the electro-mechanical (E/M) impedance

  7. Damage Identification in Aging Aircraft Structures with Piezoelectric Wafer Active Sensors

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    Damage Identification in Aging Aircraft Structures with Piezoelectric Wafer Active Sensors VICTOR the onset and progress of structural damage such as fatigue cracks and corrosion. Two main detection strategies are considered: (a) the wave propagation method for far-field damage detection; and (b

  8. Safety Verification of the Small Aircraft Transportation System Concept of Operations

    E-Print Network [OSTI]

    Muoz, Csar A.

    performed for the Small Aircraft Transportation System (SATS) Concept of Operations (ConOps). The concept of operation complies with a set of safety requirements. It is also shown that the ConOps has some desirable of Operations for Higher Volume Operation (SATS-HVO ConOps) has been developed by a team at NASA Langley

  9. Final report on development of Pulse Arrested Spark Discharge (PASD) for aging aircraft wiring application.

    SciTech Connect (OSTI)

    Lockner, Thomas Ramsbeck; Howard, R. Kevin; Pea, Gary Edward; Schneider, Larry X.; Higgins, Matthew B.; Glover, Steven Frank

    2006-09-01T23:59:59.000Z

    Pulsed Arrested Spark Discharge (PASD) is a Sandia National Laboratories Patented, non-destructive wiring system diagnostic that has been developed to detect defects in aging wiring systems in the commercial aircraft fleet. PASD was previously demonstrated on relatively controlled geometry wiring such as coaxial cables and shielded twisted-pair wiring through a contract with the U.S. navy and is discussed in a Sandia National Laboratories report, SAND2001-3225 ''Pulsed Arrested Spark Discharge (PASD) Diagnostic Technique for the Location of Defects in Aging Wiring Systems''. This report describes an expansion of earlier work by applying the PASD technique to unshielded twisted-pair and discrete wire configurations commonly found in commercial aircraft. This wiring is characterized by higher impedances as well as relatively non-uniform impedance profiles that have been found to be challenging for existing aircraft wiring diagnostics. Under a three year contract let by the Federal Aviation Administration, Interagency Agreement DTFA-03-00X90019, this technology was further developed for application on aging commercial aircraft wiring systems. This report describes results of the FAA program with discussion of previous work conducted under U.S. Department of Defense funding.

  10. Airline Fleet Maintenance: Trade-off Analysis of Alternate Aircraft Maintenance Approaches

    E-Print Network [OSTI]

    -based. The preventative alternative involves the transmission of maintenance data to maintenance personnel whenAirline Fleet Maintenance: Trade-off Analysis of Alternate Aircraft Maintenance Approaches Mike Dupuy, Dan Wesely, Cody Jenkins Abstract ­ Airline maintenance is a significant contributor

  11. De Bilt, 2012 | Trainee report Case study on the effect of aircraft induced

    E-Print Network [OSTI]

    Haak, Hein

    a warming effect on the total earth-atmosphere system (reference at TOA), because trapping of upwelling long wave solar irradiance at the land surface Kasper O. Gerritsen #12;#12;Case study on the effect of aircraft induced cloudiness on the short wave solar irradiance at the land surface Version 1.0 Date June

  12. Aircraft Observations of Sub-cloud Aerosol and Convective Cloud Physical Properties

    E-Print Network [OSTI]

    Axisa, Duncan

    2011-02-22T23:59:59.000Z

    This research focuses on aircraft observational studies of aerosol-cloud interactions in cumulus clouds. The data were collected in the summer of 2004, the spring of 2007 and the mid-winter and spring of 2008 in Texas, central Saudi Arabia...

  13. Maneuverability and Envelope Protection in the Prevention of Aircraft Loss of Control

    E-Print Network [OSTI]

    Kwatny, Harry G.

    in and use of automatic protection systems (7; 8; 9). We consider the control issues associatedManeuverability and Envelope Protection in the Prevention of Aircraft Loss of Control Robert C, PA 19104, USA e-mail: rca28@drexel.edu, hkwatny@coe.drexel.edu Abstract--Loss-of-Control (LOC

  14. H Filtering with Inequality Constraints for Aircraft Turbofan Engine Health Estimation

    E-Print Network [OSTI]

    Simon, Dan

    , this paper shows how the inequality-constrained H filtering problem can be reduced to a standard quadratic programming problem; third, this paper shows how inequality-constrained H filtering can be applied inequality-constrained H filtering to estimate aircraft engine component efficiencies and flow capacities

  15. Distributed Formation Control of Multiple Aircraft Using Constraint Yunfei Zou, Prabhakar R. Pagilla

    E-Print Network [OSTI]

    Pagilla, Prabhakar R.

    conducted to verify the proposed approach. I. INTRODUCTION The problem of autonomous formation flight geometries leads to many advantages and applications. For example, energy saving from vortex forces and fuel deployment of troops and vehicles. Moreover, many aircraft involved in a mission can be better managed

  16. Transport of expiratory droplets in an aircraft cabin Jitendra K. Guptaa

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    disease such as influenza or Tuberculosis may be the carriers of contagious agents. Indoor environments such as the airliner cabins may be susceptible to infection from such airborne contagious agents. The present of the droplets exhaled by an index passenger in an aircraft cabin. These droplets may contain active contagious

  17. Cooperative Target Localization with a Communication-Aware Unmanned Aircraft System

    E-Print Network [OSTI]

    Frew, Eric W.

    Cooperative Target Localization with a Communication-Aware Unmanned Aircraft System Maciej Stachura. Preliminary flight results are presented along with simulations to show the utility of the algorithms applied will be able to communicate with each other. This will be required if they are to work together to accomplish

  18. Asian emissions of CO and NOx: Constraints from aircraft and Chinese station data

    E-Print Network [OSTI]

    Palmer, Paul

    Asian emissions of CO and NOx: Constraints from aircraft and Chinese station data Yuxuan X. Wang to constrain estimates of Asian emissions of CO and NOx. A priori emissions are based on a detailed bottom emissions of CO and NOx, respectively, distributed heterogeneously, with the largest adjustments required

  19. Plant nuclear bodies Peter J Shaw1

    E-Print Network [OSTI]

    Shaw, Peter

    Plant nuclear bodies Peter J Shaw1 and John WS Brown2 Knowledge of the organization bodies have been examined in plants, and recently, various other sub-nuclear domains that are involved. Until recently, the only plant nuclear bodies to be in any way characterized were the nucleolus [11

  20. Controlling Wild Bodies Using Linear Temporal Logic

    E-Print Network [OSTI]

    LaValle, Steven M.

    Controlling Wild Bodies Using Linear Temporal Logic Leonardo Bobadilla Oscar Sanchez Justin or state feedback. We do this by exploiting the wild motions of very simple bodies in an environment propose to start with a "wildly behaving" body for which its precise equations of motion are unknown

  1. Direct observation of ultrafast many-body electron dynamics in a strongly-correlated ultracold Rydberg gas

    E-Print Network [OSTI]

    Nobuyuki Takei; Christian Sommer; Claudiu Genes; Guido Pupillo; Haruka Goto; Kuniaki Koyasu; Hisashi Chiba; Matthias Weidemller; Kenji Ohmori

    2015-04-14T23:59:59.000Z

    Many-body interactions govern a variety of important quantum phenomena ranging from superconductivity and magnetism in condensed matter to solvent effects in chemistry. Understanding those interactions beyond mean field is a holy grail of modern sciences. AMO physics with advanced laser technologies has recently emerged as a new platform to study quantum many-body systems. One of its latest developments is the study of long-range interactions among ultracold particles to reveal the effects of many-body correlations. Rydberg atoms distinguish themselves by their large dipole moments and tunability of dipolar interactions. Most of ultracold Rydberg experiments have been performed with narrow-band lasers in the Rydberg blockade regime. Here we demonstrate an ultracold Rydberg gas in a complementary regime, where electronic coherence is created using a broadband picosecond laser pulse, thus circumventing the Rydberg blockade to induce strong many-body correlations. The effects of long-range Rydberg interactions have been investigated by time-domain Ramsey interferometry with attosecond precision. This approach allows for the real-time observation of coherent and ultrafast many-body dynamics in which the electronic coherence is modulated by the interaction-induced correlations. The modulation evolves more rapidly than expected for two-body correlations by several orders of magnitude. We have actively controlled such ultrafast many-body dynamics by tuning the principal quantum number and the population of the Rydberg state. The observed Ramsey interferograms are well reproduced by a theoretical model beyond mean-field approximation, which can be relevant to other similar many-body phenomena in condensed matter physics and chemistry. Our new approach opens a new avenue to observe and manipulate nonequilibrium dynamics of strongly-correlated quantum many-body systems on the ultrafast timescale.

  2. Development program to certify composite doubler repair technique for commercial aircraft

    SciTech Connect (OSTI)

    Roach, D.P.

    1997-07-01T23:59:59.000Z

    Commercial airframes exceeding 20 service years often develop crack and corrosion flaws. Bonded composite doublers offer a cost effective method to safely extend aircraft lives. The Federal Aircraft Authority (FAA) has completed a project to introduce composite doubler repair technology to the commercial aircraft industry. Instead of riveting steel or aluminum plates for repair, a single composite doubler may be bonded to the damaged structure. Adhesive bonding eliminates stress concentrations caused by fastener holes. Composites are readily formed into complex shapes for repairing irregular components. Also, composite doublers can be tailored to meet specific anisotropy needs, eliminating structural stiffening in directions other than those required. Other advantages include corrosion resistance, a high strength-to-weight ratio, and potential time savings in installation. One phase of this study developed general methodologies and test programs to ensure proper performance of the technique. A second phase focused on reinforcement of an L-1011 door frame, and encompassed all lifetime tasks such as design, analysis, installation, and nondestructive inspection. This paper overviews the project and details the activities conducted to gain FAA approval for composite doubler use. Structural tests evaluated the damage tolerance and fatigue performance of composite doublers while finite element models were generated to study doubler design issues. Nondestructive inspection procedures were developed and validated using full-scale test articles. Installation dry-runs demonstrated the viability of applying composite doublers in hangar environments. The project`s documentation package was used to support installation of a Boron-Epoxy composite repair on a Delta Air Lines L-1011 aircraft. A second product of the results is a Lockheed Service Bulletin which allows the door corner composite doubler to be installed on all L-1011 aircraft. 9 refs., 10 figs., 2 tabs.

  3. Full-Scale Structural and NDI Validation Tests of Bonded Composite Doublers for Commercial Aircraft Applications

    SciTech Connect (OSTI)

    Roach, D.; Walkington, P.

    1999-02-01T23:59:59.000Z

    Composite doublers, or repair patches, provide an innovative repair technique which can enhance the way aircraft are maintained. Instead of riveting multiple steel or aluminum plates to facilitate an aircraft repair, it is possible to bond a single Boron-Epoxy composite doubler to the damaged structure. Most of the concerns surrounding composite doubler technology pertain to long-term survivability, especially in the presence of non-optimum installations, and the validation of appropriate inspection procedures. This report focuses on a series of full-scale structural and nondestructive inspection (NDI) tests that were conducted to investigate the performance of Boron-Epoxy composite doublers. Full-scale tests were conducted on fuselage panels cut from retired aircraft. These full-scale tests studied stress reductions, crack mitigation, and load transfer capabilities of composite doublers using simulated flight conditions of cabin pressure and axial stress. Also, structures which modeled key aspects of aircraft structure repairs were subjected to extreme tension, shear and bending loads to examine the composite laminate's resistance to disbond and delamination flaws. Several of the structures were loaded to failure in order to determine doubler design margins. Nondestructive inspections were conducted throughout the test series in order to validate appropriate techniques on actual aircraft structure. The test results showed that a properly designed and installed composite doubler is able to enhance fatigue life, transfer load away from damaged structure, and avoid the introduction of new stress risers (i.e. eliminate global reduction in the fatigue life of the structure). Comparisons with test data obtained prior to the doubler installation revealed that stresses in the parent material can be reduced 30%--60% through the use of the composite doubler. Tests to failure demonstrated that the bondline is able to transfer plastic strains into the doubler and that the parent aluminum skin must experience significant yield strains before any damage to the doubler will occur.

  4. Jet driven motions in the Narrow Line region of NGC1068

    E-Print Network [OSTI]

    D. J. Axon; A. Marconi; A. Capetti; F. D. Macchetto; E. J. Schreier; A. Robinson

    1998-01-26T23:59:59.000Z

    We have obtained HST FOC f/48 long-slit spectroscopy of the inner 4" of the Narrow Line Region of NGC 1068 between 3500-5400A with a spectral resolution of 1.78A/pixel. At a spatial scale of 0.0287" per pixel these data provide an order of magnitude improvement in resolution over previous ground based spectra and allow us to trace the interaction between the radio jet and the gas in the NLR. Our results show that, within +/-0.5" of the radio-jet the emission lines are kinematically disturbed and split into two components whose velocity separation is 1500 km/sec. The filaments associated with the radio lobe also show a redshifted kinematic disturbance of the order of 300 km/sec which probably is a consequence of the expansion of the radio plasma. Furthermore, the material enveloping the radio-jet is in a much higher ionization state than that of the surrounding NLR gas. The highest excitation is coincident with the jet axis where emission in the coronal line of [FeVII] 3769A is detected and the HeII 4686A is strong but where [OII] 3727A is depressed. This large localized increase in ionization on the jet axis is accompanied by the presence of an excess continuum. Because the electron density is substantially larger in the jet compared to the surrounding NLR, these results can only be explained if there is a more intense ionizing continuum associated with the jet. This can be accomplished in a variety of ways which include an intrinsically anisotropic nuclear radiation field, a reduced gas covering factor or the presence of a local ionization source. The morphology, kinematics and, possibly, the ionization structure of the NLR in the vicinity of the jet of NGC 1068 are a direct consequence of the interaction with the radio outflow.

  5. Search for a Narrow Resonance in e e- to Four Lepton Final States

    SciTech Connect (OSTI)

    Aubert, B.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G. /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT, LNS /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /INFN, Naples /Naples U. /INFN, Naples /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

    2009-10-17T23:59:59.000Z

    Motivated by recent models proposing a hidden sector with {approx} GeV scale force carriers, we present a search for a narrow dilepton resonance in 4 lepton final states using 536 fb{sup -1} collected by the BABAR detector. We search for the reaction, e{sup +}e{sup -} {yields} W{prime}W{prime} {yields} (l{sup +}l{sup -})(l{prime}{sup +}l{prime}{sup -}), where the leptons carry the full 4-momentum and the two dilepton pair invariant masses are equal. We do not observe a significant signal and we set 90% upper limits of {sigma}(e{sup +}e{sup -} {yields} W{prime}W{prime} {yields} e{sup +}e{sup -}e{sup +}e{sup -}) < (15-70) ab, {sigma}(e{sup +}e{sup -} {yields} W{prime}W{prime} {yields} e{sup +}e{sup -}{mu}{sup +}{mu}{sup -} < (15-40) ab, and {sigma}(e{sup +}e{sup -} {yields} W{prime}W{prime} {yields} {mu}{sup +}{mu}{sup -}{mu}{sup +}{mu}{sup -}) < 11-17) ab in the W{prime} mass range between 0.24 and 5.3GeV/c{sup 2}. Under the assumption that the W{prime} coupling to electrons and muons is the same, we obtain a combined upper limit of {sigma}e{sup +}e{sup -} {yields} W{prime}W{prime} {yields} l{sup +}l{sup -}l{prime}{sup +}l{prime}{sup -} < (25-60) ab. Using these limits, we constrain the product of the SM-dark sector mixing and the dark coupling constant in the case of a non-Abelian Higgsed dark sector.

  6. Developing a narrow-line laser spectrometer based on a tunable continuous-wave dye laser

    SciTech Connect (OSTI)

    Wang, Chun; Lv, Shasha; Bi, Jin [Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); University of Chinese Academy of Sciences, Beijing 100049 (China); Liu, Fang [College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093 (China); Li, Liufeng; Chen, Lisheng [Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan 430071, China and Laboratory of Atomic Frequency Standards, Chinese Academy of Sciences, Wuhan 430071 (China)

    2014-08-15T23:59:59.000Z

    We present the development of a dye-laser-based spectrometer operating at 550600 nm. The spectrometer will be used to detect an ultra-narrow clock transition ({sup 1}S{sub 0}-{sup 3}P{sub 0}) in an Ytterbium optical lattice clock and perform high-resolution spectroscopy of iodine molecules trapped in the sub-nanometer channels of zeolite crystal (AlPO{sub 4}-11). Two-stage Pound-Drever-Hall frequency stabilization is implemented on the tunable continuous-wave dye laser to obtain a reliable operation and provide stable laser radiations with two different spectral linewidths. In the first-stage frequency locking, a compact home-built intracavity electro-optic modulator is adopted for suppressing fast frequency noise. With an acquisition time of 0.1 s the 670-kHz linewidth of the free-running dye laser is reduced to 2 kHz when locked to a pre-stabilization optical cavity with a finesse of 1170. When the pre-stabilized laser is locked to a high-finesse optical cavity, a linewidth of 1.4 Hz (2 s) is observed and the frequency stability is 3.7 10{sup ?15} (3 s). We also measure and analyze the individual noise contributions such as those from residual amplitude modulation and electronic noise. The ongoing upgrades include improving long-term frequency stability at time scales from 10 to 100 s and implementing continuous frequency scan across 10 GHz with radio-frequency precision.

  7. d:\\activepdf\\uploadfolder\\$asq1rr04-4144-212200461042pm.doc Page 1 Erosional narrowing after dam removal: Theory and numerical model

    E-Print Network [OSTI]

    Parker, Gary

    of a dam that is filled with sediment. A channel incises into the deposit after failure of the leadingd:\\activepdf\\uploadfolder\\$asq1rr04-4144-212200461042pm.doc Page 1 Erosional narrowing after dam phenomenon herein called "erosional narrowing". This occurs immediately after the sudden removal of a dam

  8. Uniformly dense polymeric foam body

    DOE Patents [OSTI]

    Whinnery Jr., Leroy

    2003-07-15T23:59:59.000Z

    A method for providing a uniformly dense polymer foam body having a density between about 0.013 g/cm.sup.3 to about 0.5 g/cm.sup.3 is disclosed. The method utilizes a thermally expandable polymer microsphere material wherein some of the microspheres are unexpanded and some are only partially expanded. It is shown that by mixing the two types of materials in appropriate ratios to achieve the desired bulk final density, filling a mold with this mixture so as to displace all or essentially all of the internal volume of the mold, heating the mold for a predetermined interval at a temperature above about 130.degree. C., and then cooling the mold to a temperature below 80.degree. C. the molded part achieves a bulk density which varies by less then about .+-.6% everywhere throughout the part volume.

  9. Narrowing of the coherent population trapping resonance under zone pumping in cells with different characteristics of the wall coating

    SciTech Connect (OSTI)

    Kazakov, G A; Litvinov, A N; Matisov, B G [St. Petersburg State Polytechnic University, St. Petersburg (Russian Federation)

    2012-02-28T23:59:59.000Z

    It is shown that when coherent population trapping (CPT) resonance is excited by a narrow laser beam, the presence of elastic collisions with the cell wall significantly affects the line shape of the CPT-resonance. We have constructed a theoretical model, which is based on averaging over the random Ramsey sequences of the atom dwell time in the beam and dark zones and takes into account the probability of elastic bounce of an atom from the wall.

  10. Midterm Results of Uterine Artery Embolization Using Narrow-Size Calibrated Embozene Microspheres

    SciTech Connect (OSTI)

    Stampfl, Ulrike; Radeleff, Boris; Sommer, Christof [University of Heidelberg, Department of Diagnostic and Interventional Radiology (Germany); Stampfl, Sibylle [University of Heidelberg, Department of Neuroradiology (Germany); Dahlke, Angelika; Bellemann, Nadine; Kauczor, Hans-Ulrich [University of Heidelberg, Department of Diagnostic and Interventional Radiology (Germany); Richter, Goetz M., E-mail: G.Richter@klinikum-stuttgart.de [Klinikum Stuttgart, Clinics for Diagnostic and Interventional Radiology (Germany)

    2011-04-15T23:59:59.000Z

    Purpose: To evaluate safety and efficacy of uterine artery embolization using narrow-size-range polyphosphazene-coated hydrogel microspheres (Embozene, CeloNova Biosciences, Newnan, GA). Methods: Between May 2006 and September 2008, a total of 121 consecutive patients (mean {+-} SD age 42.1 {+-} 5.4 years, range 30.5-51.5 years) were enrolled onto this single-center study. The primary study endpoint was safety as assessed by the society of interventional radiology (SIR) classification. The secondary endpoint was efficacy, which was based on a 1-year magnetic resonance imaging study and relief of symptoms documented by the Medical Outcomes Study 36-Item Short-Form Health Survey questionnaire over a 2-year interval. Results: The mean {+-} SD diameter of the dominant fibroid was 6.4 {+-} 2.6 (range, 2.9-13.9) cm and the mean volume 137.2 {+-} 245.1 (range, 5.3-1184) ml. Most patients had multiple fibroids with 11% more than 10. A total of 240 of 242 interventions were completed as planned, a technical success rate of 99.2%. According to the SIR classification, one type A, eight type C, and one type D complication occurred. Total devascularization was noted in 96% (116 of 121) of dominant fibroids. Volume decrease was 4% at 2 weeks, 52% (P < 0.001) at 3 months, 78% (P < 0.001) at 6 months, and 91% at 12 months (P < 0.001). The latter difference was statistically significant (P = 0.007). A total of 92% had improved hypermenorrhea at 1 year and 94% at 2 years. Dysmenorrhea was improved in 96% at 1 year and in 95% at 2 years. The overall health status score was 60.4 {+-} 26.2 points at baseline and 96.9 {+-} 3.8 after 1 year (P = 0.0019).ConclusionUterine artery embolization with Embozene microspheres is a safe procedure. Its efficacy is demonstrated by high fibroid devascularization and volume reduction rates and significant improvements of clinical symptoms and quality-of-life scores during follow-up.

  11. The UV Properties of the Narrow Line Quasar I Zwicky 1

    E-Print Network [OSTI]

    Ari Laor; Buell T. Jannuzi; Richard F. Green; Todd A. Boroson

    1997-06-26T23:59:59.000Z

    I Zw 1 is the prototype narrow line quasar. We report here the results of our study of the UV emission of I Zw 1 using a high S/N (50-120) spectrum obtained with the HST FOS. The following main new results are obtained: 1. The Mg II and Al III doublets are partially/fully resolved. The measured doublet ratios verify theoretical predictions that the lines are thermalized in the BLR. 2. A weak associated UV absorption system is detected in N~V, and possibly also in C IV and Lya, suggesting an outflow with a velocity of 1870 km/s and velocity dispersion <300 km/s. 3. Lines from ions of increasing ionization level show increasing excess blue wing flux, and an increasing line peak velocity shift, reaching a maximum blueshift of about 2000 km/s for He II 1640. This may indicate an out-flowing component in the BLR, where the ionization level increases with velocity, and which is visible only in the approaching direction. The highest velocity part of this outflow may produce the associated UV absorption system. 4. The small C III] 1909 EW, and the small C III] 1909/Lya and C III] 1909/Si III] 1892 flux ratios indicate a typical BLR density of 10^11, i.e. about an order of magnitude larger than implied by C III] 1909 in most quasars. A BLR component of a higher density is implied by the EW and doublet ratio of the Al III 1857 doublet. 5. Prominent Fe II UV 191 emission is seen, together with weaker line emission at 1294 and 1871 A. These three features have been proposed as evidence for significant Lya pumping of the 8-10 eV levels of Fe II. 6. Significant Fe III emission is present. The Fe III UV 34 and UV 48 multiplets are clearly resolved, and Fe III UV 1, UV 47, UV 50, and UV 68 may also be present. (Shortened version)

  12. The enlargement of high reflectance range in ultra-narrow bandpass filter with disordered one-dimensional photonic crystal

    SciTech Connect (OSTI)

    Chen, Guibin, E-mail: gbchen@hytc.edu.cn [Department of Physics and Jiangsu Key Laboratory for Chemistry of Low Dimensional Material, Huaiyin Normal University, Jiangsu 223300 (China); State Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams, School of Physics, Optoelectronic Technology and College of Advanced Science and Technology, Dalian University of Technology, Dalian 116024 (China); Yu, Haichun [Department of Physics and Jiangsu Key Laboratory for Chemistry of Low Dimensional Material, Huaiyin Normal University, Jiangsu 223300 (China)

    2014-01-21T23:59:59.000Z

    The conventional ultra-narrow bandpass filter structure has only a very limited width of high-reflectance range. This study, by introducing disorder into one-dimensional (1D) photonic crystal, attempts to enlarge the width of high-reflectance range while keeping the ultra-narrow bandpass. Enlargement by 46.8% was obtained after theoretical design. Since this structure contains some degree of disorder already, it has a strong tolerance of the variation of layer thicknesses. Unlike studies using conventional periodic structures, theoretical statistical results in this study demonstrate that high quality remains even after allowing for 5% variation of layer thicknesses. This indicates that only a very low thickness control precision is required in the future and the production difficulty is immensely lowered. To put the construction to test, a structure has been developed and demonstrated by a magnetron reactive sputtering coating system, which agrees with the theoretical result very well. By introducing disorder into the periodic 1D photonic crystal structure, the high-reflectance range is significantly extended by 37%, with an ultra-narrow pass band of 0.8?nm and intensity of 82%.

  13. THE DISAPPEARANCE OF A NARROW Mg II ABSORPTION SYSTEM IN QUASAR SDSS J165501.31+260517.4

    SciTech Connect (OSTI)

    Chen Zhifu; Qin Yiping [Department of Physics and Telecommunication Engineering, Baise University, Baise, Guangxi 533000 (China); Gu Minfeng, E-mail: zhichenfu@126.com, E-mail: ypqin@126.com, E-mail: gumf@shao.ac.cn [Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030 (China)

    2013-06-10T23:59:59.000Z

    In this paper, we present for the first time the discovery of the disappearance of a narrow Mg II {lambda}{lambda}2796, 2803 absorption system from the spectra of the quasar SDSS J165501.31+260517.4 (z{sub e} = 1.8671). This absorber is located at z{sub abs} = 1.7877 and has a velocity offset of 8423 km s{sup -1} with respect to the quasar. According to the velocity offset and the line variability, this narrow Mg II {lambda}{lambda}2796, 2803 absorption system is likely intrinsic to the quasar. Since the corresponding UV continuum emission and the absorption lines of another narrow Mg II {lambda}{lambda}2796, 2803 absorption system at z{sub abs} = 1.8656 are very stable, we believe that the disappearance of the absorption system is unlikely to be caused by the change in ionization of absorption gas. Instead, it likely arises from the motion of the absorption gas across the line of sight.

  14. Study of particulate matter formation and evolution in near-field aircraft plumes using a one-dimensional microphysical model

    E-Print Network [OSTI]

    Zhang, Jianye, S.M. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    Environmental concerns have led to a growing effort to investigate and characterize the particulate matter (PM) emissions from aircraft engines. This thesis presents a one-dimensional microphysics and chemical kinetics ...

  15. A Multi-Modal Unscented Kalman Filter for Inference of Aircraft Position and Taxi Mode from Surface Surveillance Data

    E-Print Network [OSTI]

    Balakrishnan, Hamsa

    We describe a multi-modal unscented Kalman lter developed for estimation of aircraft position, velocity and heading from noisy surface surveillance data. The raw data is composed of tracks generated by the Airport Surface ...

  16. Method for the assessment of airborne off-target pesticide spray concentrations due to aircraft wing-tip vortex

    E-Print Network [OSTI]

    Oliva, Sergio Eduardo

    2003-01-01T23:59:59.000Z

    The purpose of this thesis is to develop a method for assessing airborne concentrations caused by off-target pesticide drift. Concentrations are bounded by the worst credible circumstances within a normal aircraft pesticide spraying. It is assumed...

  17. Aircraft-protection radar for use with atmospheric lidars Thomas J. Duck, Bernard Firanski, Frank D. Lind, and Dwight Sipler

    E-Print Network [OSTI]

    Duck, Thomas J.

    . Lind, and Dwight Sipler A modified X-band radar system designed to detect aircraft during atmospheric, Dalhousie Univer- sity, Halifax, Nova Scotia, Canada B3H 3J5. F. D. Lind and D. Sipler are with Haystack

  18. Lease classification of aircraft leasing : a case study of cross-border leases between Korean Air and its subsidiary

    E-Print Network [OSTI]

    Park, Eun Ho, M.B.A. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    Aircraft leasing represents a significant portion of the financial statements of airline firms. Accounting treatment of lease transactions is becoming more complicated as firms attempt to achieve off-balance-sheet outcomes ...

  19. Online measurements of the emissions of intermediate-volatility and semi-volatile organic compounds from aircraft

    E-Print Network [OSTI]

    Herndon, S. C.

    A detailed understanding of the climate and air quality impacts of aviation requires measurements of the emissions of intermediate-volatility and semi-volatile organic compounds (I/SVOCs) from aircraft. Currently both the ...

  20. Theoretical full power correction factors as related to changes in ambient temperature, pressure and absolute humidity for aircraft turbine engines

    E-Print Network [OSTI]

    Raphael, Michel Antoun

    1969-01-01T23:59:59.000Z

    IN AMBIENT TEMPERATURE, PRESSURF. AND ABSOLUTE HUMIDITY FOR AIRCRAFT TURBINE ENGINES (August 1969) Michael Antoun Raphael B. S. (Mechanical Engineering) Texas A&M University Directed by: Professor Stanley H, Lowy ABSTRACT Power losses in aircraft gas... rated at standard atmospheric conditions (i. e, ambient temperature 69 F 3'Fend atmospheric pressure 29. 92 in. Hg. dry) . Obviously this same turbine will not be exposed to such standard conditions; therefore we have a change in power directly...

  1. A miniature powerplant for very small, very long range autonomous aircraft. Final report

    SciTech Connect (OSTI)

    Tad McGeer

    1999-09-29T23:59:59.000Z

    The authors have developed a new piston engine offering unprecedented efficiency for a new generation of miniature robotic aircraft. Following Phase 1 preliminary design in 1996--97, they have gone forward in Phase 2 to complete detail design, and are nearing completion of a first batch of ten engines. A small-engine dynamometer facility has been built in preparation for the test program. Provisions have been included for supercharging, which will allow operation at ceilings in the 10,000 m range. Component tests and detailed analysis indicate that the engine will achieve brake-specific fuel consumption well below 300 gm/kWh at power levels of several hundred watts. This level of performance opens the door to development of tabletop-sized aircraft having transpacific range and multi-day endurance, which will offer extraordinary new capabilities for meteorology, geomagnetic, and a variety of applications in environmental monitoring and military operations.

  2. Male body image: critical measurement issues

    E-Print Network [OSTI]

    Brown, Joshua Daniel

    2002-01-01T23:59:59.000Z

    12 16 RESULTS. . . 18 Companng the SM and the BIA m the Assessment of Body Image. How Accurate Were Males and Females m Gauging Their Musculanty and Body Fatness' ?. . . How Accurate Were Males and Females m Gauging What the Opposite Sex Found...-wise Compansons for Quesuon Main Effects wtth BF%. Male and Female. 49 9 Comparmg Effect Sizes (Current vs. Ideal) Body Image Assessment (BIA) vs Somatomorphic Matnx (SM) 50 10 Factor Structure of the Affective Body Satisfaction (ABS). 51 11 Comparing Explamed...

  3. Method of producing .beta.-spodumene bodies

    DOE Patents [OSTI]

    Chyung, Kenneth (Painted Post, NY); Day, J. Paul (Big Flats, NY); Holleran, Louis M. (Big Flats, NY); Olszewski, Anthony R. (Bath, NY)

    1999-01-01T23:59:59.000Z

    Beta-spodumene bodies and method of preparing the bodies that involves providing a uniform plastic batch of inorganic raw materials, organic binder, and vehicle, wherein the inorganic raw materials are composed of, in percent by weight, about 75% to 95% minerals, and about 5% to 25% glass. The batch is formed into a green body that is fired to produce a body composed substantially of beta-spodumene, and having a thermal expansion coefficient of <10.times.10.sup.-7 /.degree.C.(0-800.degree. C.), and a strength of .gtoreq.4 Ksi.

  4. Impact Analyses and Tests of Metal Cask Considering Aircraft Engine Crash - 12308

    SciTech Connect (OSTI)

    Lee, Sanghoon; Choi, Woo-Seok; Kim, Ki-Young; Jeon, Je-Eon; Seo, Ki-Seog [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2012-07-01T23:59:59.000Z

    The structural integrity of a dual purpose metal cask currently under development by the Korea Radioactive Waste Management Cooperation (KRMC) is evaluated through analyses and tests under a high-speed missile impact considering the targeted aircraft crash conditions. The impact conditions were carefully chosen through a survey on accident cases and recommendations from the literature. The missile impact velocity was set at 150 m/s, and two impact orientations were considered. A simplified missile simulating a commercial aircraft engine is designed from an impact load history curve provided in the literature. In the analyses, the focus is on the evaluation of the containment boundary integrity of the metal cask. The analyses results are compared with the results of tests using a 1/3 scale model. The results show very good agreements, and the procedure and methodology adopted in the structural analyses are validated. While the integrity of the cask is maintained in one evaluation where the missile impacts the top side of the free standing cask, the containment boundary is breached in another case in which the missile impacts the center of the cask lid in a perpendicular orientation. A safety assessment using a numerical simulation of an aircraft engine crash into spent nuclear fuel storage systems is performed. A commercially available explicit finite element code is utilized for the dynamic simulation, and the strain rate effect is included in the modeling of the materials used in the target system and missile. The simulation results show very good agreement with the test results. It is noted that this is the first test considering an aircraft crash in Korea. (authors)

  5. Realistic Probability Estimates For Destructive Overpressure Events In Heated Center Wing Tanks Of Commercial Jet Aircraft

    SciTech Connect (OSTI)

    Alvares, N; Lambert, H

    2007-02-07T23:59:59.000Z

    The Federal Aviation Administration (FAA) identified 17 accidents that may have resulted from fuel tank explosions on commercial aircraft from 1959 to 2001. Seven events involved JP 4 or JP 4/Jet A mixtures that are no longer used for commercial aircraft fuel. The remaining 10 events involved Jet A or Jet A1 fuels that are in current use by the commercial aircraft industry. Four fuel tank explosions occurred in center wing tanks (CWTs) where on-board appliances can potentially transfer heat to the tank. These tanks are designated as ''Heated Center Wing Tanks'' (HCWT). Since 1996, the FAA has significantly increased the rate at which it has mandated airworthiness directives (ADs) directed at elimination of ignition sources. This effort includes the adoption, in 2001, of Special Federal Aviation Regulation 88 of 14 CFR part 21 (SFAR 88 ''Fuel Tank System Fault Tolerance Evaluation Requirements''). This paper addresses SFAR 88 effectiveness in reducing HCWT ignition source probability. Our statistical analysis, relating the occurrence of both on-ground and in-flight HCWT explosions to the cumulative flight hours of commercial passenger aircraft containing HCWT's reveals that the best estimate of HCWT explosion rate is 1 explosion in 1.4 x 10{sup 8} flight hours. Based on an analysis of SFAR 88 by Sandia National Laboratories and our independent analysis, SFAR 88 reduces current risk of historical HCWT explosion by at least a factor of 10, thus meeting an FAA risk criteria of 1 accident in billion flight hours. This paper also surveys and analyzes parameters for Jet A fuel ignition in HCWT's. Because of the paucity of in-flight HCWT explosions, we conclude that the intersection of the parameters necessary and sufficient to result in an HCWT explosion with sufficient overpressure to rupture the HCWT is extremely rare.

  6. ATHENA, the Desktop Human "Body"

    SciTech Connect (OSTI)

    Iyer, Rashi; Harris, Jennifer

    2014-09-29T23:59:59.000Z

    Creating surrogate human organs, coupled with insights from highly sensitive mass spectrometry technologies, a new project is on the brink of revolutionizing the way we screen new drugs and toxic agents. ATHENA, the Advanced Tissue-engineered Human Ectypal Network Analyzer project team, is developing four human organ constructs - liver, heart, lung and kidney - that are based on a significantly miniaturized platform. Each organ component will be about the size of a smartphone screen, and the whole ATHENA "body" of interconnected organs would fit neatly on a desk. "By developing this 'homo minutus,' we are stepping beyond the need for animal or Petri dish testing: There are huge benefits in developing drug and toxicity analysis systems that can mimic the response of actual human organs," said Rashi Iyer, a senior scientist at Los Alamos National Laboratory, the lead laboratory on the five-year, $19 million multi-institutional effort. The project is supported by the Defense Threat Reduction Agency (DTRA). Some 40 percent of pharmaceuticals fail their clinical trials, Iyer noted, and there are thousands of chemicals whose effects on humans are simply unknown. Providing a realistic, cost-effective and rapid screening system such as ATHENA with high-throughput capabilities could provide major benefits to the medical field, screening more accurately and offering a greater chance of clinical trial success.

  7. ATHENA, the Desktop Human "Body"

    ScienceCinema (OSTI)

    Iyer, Rashi; Harris, Jennifer

    2015-01-05T23:59:59.000Z

    Creating surrogate human organs, coupled with insights from highly sensitive mass spectrometry technologies, a new project is on the brink of revolutionizing the way we screen new drugs and toxic agents. ATHENA, the Advanced Tissue-engineered Human Ectypal Network Analyzer project team, is developing four human organ constructs - liver, heart, lung and kidney - that are based on a significantly miniaturized platform. Each organ component will be about the size of a smartphone screen, and the whole ATHENA "body" of interconnected organs would fit neatly on a desk. "By developing this 'homo minutus,' we are stepping beyond the need for animal or Petri dish testing: There are huge benefits in developing drug and toxicity analysis systems that can mimic the response of actual human organs," said Rashi Iyer, a senior scientist at Los Alamos National Laboratory, the lead laboratory on the five-year, $19 million multi-institutional effort. The project is supported by the Defense Threat Reduction Agency (DTRA). Some 40 percent of pharmaceuticals fail their clinical trials, Iyer noted, and there are thousands of chemicals whose effects on humans are simply unknown. Providing a realistic, cost-effective and rapid screening system such as ATHENA with high-throughput capabilities could provide major benefits to the medical field, screening more accurately and offering a greater chance of clinical trial success.

  8. Sonic IR crack detection of aircraft turbine engine blades with multi-frequency ultrasound excitations

    SciTech Connect (OSTI)

    Zhang, Ding; Han, Xiaoyan [Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202 (United States); Newaz, Golam [Department of Mechanical Engineering, Wayne State University, Detroit, MI 48202 (United States)

    2014-02-18T23:59:59.000Z

    Effectively and accurately detecting cracks or defects in critical engine components, such as turbine engine blades, is very important for aircraft safety. Sonic Infrared (IR) Imaging is such a technology with great potential for these applications. This technology combines ultrasound excitation and IR imaging to identify cracks and flaws in targets. In general, failure of engine components, such as blades, begins with tiny cracks. Since the attenuation of the ultrasound wave propagation in turbine engine blades is small, the efficiency of crack detection in turbine engine blades can be quite high. The authors at Wayne State University have been developing the technology as a reliable tool for the future field use in aircraft engines and engine parts. One part of the development is to use finite element modeling to assist our understanding of effects of different parameters on crack heating while experimentally hard to achieve. The development has been focused with single frequency ultrasound excitation and some results have been presented in a previous conference. We are currently working on multi-frequency excitation models. The study will provide results and insights of the efficiency of different frequency excitation sources to foster the development of the technology for crack detection in aircraft engine components.

  9. Evaluation of scanners for C-scan imaging in nondestructive inspection of aircraft

    SciTech Connect (OSTI)

    Gieske, J.H.

    1994-04-01T23:59:59.000Z

    The goal of this project was to produce a document that contains information on the usability and performance of commercially available, fieldable, and portable scanner systems as they apply to aircraft NDI inspections. In particular, the scanners are used to generate images of eddy current, ultrasonic, or bond tester inspection data. The scanner designs include manual scanners, semiautomated scanners, and fully automated scanners. A brief description of the functionality of each scanner type, a sketch, and a fist of the companies that support the particular design are provided. Vendors of each scanner type provided hands-on demonstrations of their equipment on real aircraft samples in the FAA Aging Aircraft Nondestructive Inspection Validation Center (AANC) in Albuquerque, NM. From evaluations recorded during the demonstrations, a matrix of scanner features and factors and ranking of the capabilities and limitations of the design, portability, articulation, performance, usability, and computer hardware/software was constructed to provide a quick reference for comparing the different scanner types. Illustrations of C-scan images obtained during the demonstration are shown.

  10. Estimation of body composition in channel catfish utilizing relative weight and total body electrical conductivity

    E-Print Network [OSTI]

    Jaramillo, Francisco

    1993-01-01T23:59:59.000Z

    ESTIMATION OF BODY COMPOSITION IN CHANNEL CATFISH UTILIZING RELATIVE WEIGHT AND TOTAL BODY ELECTRICAL CONDUCTIVITY A Thesis by FRANCISCO JARAMILLO, JR. Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1993 Major Subject: Wildlife and Fisheries Sciences ESTIMATION OF BODY COMPOSITION IN CHANNEL CATFISH UTILIZING RELATIVE WEIGHT AND TOTAL BODY ELECTRICAL CONDUCTIVITY A Thesis...

  11. Narrow-linewidth, single-frequency semiconductor laser with a phase-conjugate external-cavity mirror

    SciTech Connect (OSTI)

    Vahala, K.; Kyuma, K.; Yariv, A.; Kwong, S.K.; Cronin-Golomb, M.

    1986-12-08T23:59:59.000Z

    Spectral characteristics of an external-cavity semiconductor laser, which uses a phase-conjugate mirror for its external reflection were measured. This device has significant advantages over the conventional external-cavity system owing to the self-aligning nature of the phase-conjugate mirror. The fiber delay line self-heterodyne technique is used to measure the fundamental linewidth for single-mode operation of this device. It shows the linewidth to be at least as narrow as the instrumental resolution of 100 kHz.

  12. Sub-Doppler and subnatural narrowing of an absorption line induced by interacting dark resonances in a tripod system

    SciTech Connect (OSTI)

    Goren, C.; Rosenbluh, M. [Department of Physics, Bar-Ilan University, Ramat Gan 52900 (Israel); Wilson-Gordon, A.D.; Friedmann, H. [Department of Chemistry, Bar-Ilan University, Ramat Gan 52900 (Israel)

    2004-06-01T23:59:59.000Z

    A method is presented for obtaining sub-Doppler and subnatural narrowing and increased absorption of a spectral line. The ultranarrow spectral line is confined between two closely spaced electromagnetically induced transparency windows in a nearly degenerate tripod atomic system formed by an F{sub g}=1{yields}F{sub e}=0 transition, split by a magnetic field. The system is driven by a {sigma}-polarized pump and probed by a tunable {pi}-polarized laser. It can be used to measure small magnetic fields and also as a magneto-optic switch.

  13. Observation of a narrow structure in 1H(?,KS0)X via interference with phi-meson production

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Amaryan, M J; Nepali, C; Polyakov, M V; Azimov, Ya; Briscoe, W J; Dodge, G E; Hyde, C E; Klein, F; Kuznetsov, V; Strakovsky, I

    2012-03-21T23:59:59.000Z

    We report observation of a narrow peak structure at ?1.54 GeV with a Gaussian width ? = 6 MeV in the missing mass of KS in the reaction ? + p ? pKSKL. The observed structure may be due to the interference between a strange (or antistrange) baryon resonance in the pKL system and the ?(KSKL) photoproduction leading to the same final state. The statistical significance of the observed excess of events estimated as the log-likelihood ratio of the resonant signal + background hypothesis and the ?-production-based background-only hypothesis corresponds to 5.3?.

  14. Search for narrow resonances in e+ e- annihilation between 1.85 and 3.1 GeV with the KEDR Detector

    E-Print Network [OSTI]

    Anashin, V V; Baldin, E M; Barladyan, A K; Barnyakov, A Yu; Barnyakov, M Yu; Baru, S E; Basok, I Yu; Beloborodova, O L; Blinov, A E; Blinov, V E; Bobrov, A V; Bobrovnikov, V S; Bogomyagkov, A V; Bondar, A E; Buzykaev, A R; Eidelman, S I; Grigoriev, D N; Glukhovchenko, Yu M; Gulevich, V V; Gusev, D V; Karnaev, S E; Karpov, G V; Karpov, S V; Kharlamova, T A; Kiselev, V A; Kolmogorov, V V; Kononov, S A; Kotov, K Yu; Kravchenko, E A; Kudryavtsev, V N; Kulikov, V F; Kurkin, G Ya; Kuper, E A; Levichev, E B; Maksimov, D A; Malyshev, V M; Maslennikov, A L; Medvedko, A S; Meshkov, O I; Mishnev, S I; Morozov, I I; Muchnoi, N Yu; Neufeld, V V; Nikitin, S A; Nikolaev, I B; Okunev, I N; Onuchin, A P; Oreshkin, S B; Orlov, I O; Osipov, A A; Peleganchuk, S V; Pivovarov, S G; Piminov, P A; Petrov, V V; Poluektov, A O; Prisekin, V G; Ruban, A A; Sandyrev, V K; Savinov, G A; Shamov, A G; Shatilov, D N; Shwartz, B A; Simonov, E A; Sinyatkin, S V; Skrinsky, A N; Smaluk, V V; Sokolov, A V; Sukharev, A M; Starostina, E V; Talyshev, A A; Tayursky, V A; Telnov, V I; Tikhonov, Yu A; Todyshev, K Yu; Tumaikin, G M; Usov, Yu V; Vorobiov, A I; Yushkov, A N; Zhilich, V N; Zhulanov, V V; Zhuravlev, A N

    2011-01-01T23:59:59.000Z

    We report results of a search for narrow resonances in e+ e- annihilation at center-of-mass energies between 1.85 and 3.1 GeV performed with the KEDR detector at the VEPP-4M e+ e- collider. The upper limit on the leptonic width of a narrow resonance Gamma(R -> ee) Br(R -> hadr) < 120 eV has been obtained (at 90 % C.L.).

  15. Applying technology strategy with enterprise architecting : a case study in transformation planning for integrating Unmanned Aircraft Systems into the National Airspace

    E-Print Network [OSTI]

    Richardson, Kristina L. (Kristina Lynn)

    2009-01-01T23:59:59.000Z

    The research presented in this thesis combines Enterprise Architecture and Technology Strategy for analyzing, evaluating, and recommending appropriate solutions for integrating Unmanned Aircraft Systems (UAS) into the ...

  16. Tracing Quasar Narrow-Line Regions Across Redshift: A Library of High S/N Optical Spectra

    E-Print Network [OSTI]

    Tammour, A; Richards, G T

    2015-01-01T23:59:59.000Z

    In a single optical spectrum, the quasar narrow-line region (NLR) reveals low density, photoionized gas in the host galaxy interstellar medium, while the immediate vicinity of the central engine generates the accretion disk continuum and broad emission lines. To isolate these two components, we construct a library of high S/N optical composite spectra created from the Sloan Digital Sky Survey (SDSS-DR7). We divide the sample into bins of continuum luminosity and Hbeta FWHM that are used to construct median composites at different redshift steps up to 0.75. We measure the luminosities of the narrow-emission lines [NeV]3427, [NeIII]3870, [OIII]5007, and [OII]3728 with ionization potentials (IPs) of 97, 40, 35, and 13.6 eV respectively. The high IP lines' luminosities show no evidence of increase with redshift consistent with no evolution in the AGN SED or the host galaxy ISM illuminated by the continuum. In contrast, we find that the [OII] line becomes stronger at higher redshifts, and we interpret this as a co...

  17. Multiwavelength Monitoring of the Enigmatic Narrow-Line Seyfert 1 PMN J0948 0022 in March-July 2009

    SciTech Connect (OSTI)

    Abdo, A.A.; /Naval Research Lab, Wash., D.C. /Federal City Coll.; Ackermann, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Ajello, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Axelsson, M.; /Stockholm U. /Stockholm U., OKC; Baldini, L.; /INFN, Pisa; Ballet, J.; /DAPNIA, Saclay; Barbiellini, G.; /INFN, Trieste /Trieste U.; Bastieri, D.; /INFN, Padua /Padua U.; Baughman, B.M.; /Ohio State U.; Bechtol, K.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bellazzini, R. /INFN, Pisa; Berenji, B.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bloom, E.D.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bonamente, E. /INFN, Perugia /Perugia U.; Borgland, A.W.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bregeon, J.; /INFN, Pisa; Brez, A.; /INFN, Pisa; Brigida, M.; /Bari U. /INFN, Bari; Bruel, P.; /Ecole Polytechnique; Burnett, T.H.; /Washington U., Seattle; Caliandro, G.A.; /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /Milan Polytechnic /DAPNIA, Saclay /ASDC, Frascati /INFN, Perugia /Perugia U. /NASA, Goddard /NASA, Goddard /CSST, Baltimore /SISSA, Trieste /Naval Research Lab, Wash., D.C. /George Mason U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Montpellier U. /Garching, Max Planck Inst., MPE /Stockholm U. /Stockholm U., OKC /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /ASDC, Frascati /INFN, Trieste /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /CENBG, Gradignan /CENBG, Gradignan /Montpellier U. /Bari U. /INFN, Bari /Ecole Polytechnique /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Ecole Polytechnique /Brera Observ. /INFN, Trieste /Bonn, Max Planck Inst., Radioastron. /Hiroshima U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; /more authors..

    2012-03-29T23:59:59.000Z

    Following the recent discovery of {gamma} rays from the radio-loud narrow-line Seyfert 1 galaxy PMN J0948+0022 (z = 0.5846), we started a multiwavelength campaign from radio to {gamma} rays, which was carried out between the end of 2009 March and the beginning of July. The source displayed activity at all the observed wavelengths: a general decreasing trend from optical to {gamma}-ray frequencies was followed by an increase of radio emission after less than two months from the peak of the {gamma}-ray emission. The largest flux change, about a factor of about 4, occurred in the X-ray band. The smallest was at ultraviolet and near-infrared frequencies, where the rate of the detected photons dropped by a factor 1.6-1.9. At optical wavelengths, where the sampling rate was the highest, it was possible to observe day scale variability, with flux variations up to a factor of about 3. The behavior of PMN J0948+0022 observed in this campaign and the calculated power carried out by its jet in the form of protons, electrons, radiation, and magnetic field are quite similar to that of blazars, specifically of flat-spectrum radio quasars. These results confirm the idea that radio-loud narrow-line Seyfert 1 galaxies host relativistic jets with power similar to that of average blazars.

  18. Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data

    E-Print Network [OSTI]

    The LIGO Scientific Collaboration; the Virgo Collaboration; J. Aasi; B. P. Abbott; R. Abbott; T. Abbott; M. R. Abernathy; F. Acernese; K. Ackley; C. Adams; T. Adams; T. Adams; P. Addesso; R. X. Adhikari; V. Adya; C. Affeldt; M. Agathos; K. Agatsuma; N. Aggarwal; O. D. Aguiar; A. Ain; P. Ajith; A. Alemic; B. Allen; A. Allocca; D. Amariutei; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; C. Arceneaux; J. S. Areeda; G. Ashton; S. Ast; S. M. Aston; P. Astone; P. Aufmuth; C. Aulbert; B. E. Aylott; S. Babak; P. T. Baker; F. Baldaccini; G. Ballardin; S. W. Ballmer; J. C. Barayoga; M. Barbet; S. Barclay; B. C. Barish; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; J. Bartlett; M. A. Barton; I. Bartos; R. Bassiri; A. Basti; J. C. Batch; Th. S. Bauer; C. Baune; V. Bavigadda; B. Behnke; M. Bejger; C. Belczynski; A. S. Bell; C. Bell; M. Benacquista; J. Bergman; G. Bergmann; C. P. L. Berry; D. Bersanetti; A. Bertolini; J. Betzwieser; S. Bhagwat; R. Bhandare; I. A. Bilenko; G. Billingsley; J. Birch; S. Biscans; M. Bitossi; C. Biwer; M. A. Bizouard; J. K. Blackburn; L. Blackburn; C. D. Blair; D. Blair; S. Bloemen; O. Bock; T. P. Bodiya; M. Boer; G. Bogaert; P. Bojtos; C. Bond; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; Sukanta Bose; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; A. F. Brooks; D. A. Brown; D. D. Brown; N. M. Brown; S. Buchman; A. Buikema; T. Bulik; H. J. Bulten; A. Buonanno; D. Buskulic; C. Buy; L. Cadonati; G. Cagnoli; J. Caldern Bustillo; E. Calloni; J. B. Camp; K. C. Cannon; J. Cao; C. D. Capano; F. Carbognani; S. Caride; S. Caudill; M. Cavagli; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; R. Chakraborty; T. Chalermsongsak; S. J. Chamberlin; S. Chao; P. Charlton; E. Chassande-Mottin; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; M. Cho; J. H. Chow; N. Christensen; Q. Chu; S. Chua; S. Chung; G. Ciani; F. Clara; J. A. Clark; F. Cleva; E. Coccia; P. -F. Cohadon; A. Colla; C. Collette; M. Colombini; L. Cominsky; M. Constancio, Jr.; A. Conte; D. Cook; T. R. Corbitt; N. Cornish; A. Corsi; C. A. Costa; M. W. Coughlin; J. -P. Coulon; S. Countryman; P. Couvares; D. M. Coward; M. J. Cowart; D. C. Coyne; R. Coyne; K. Craig; J. D. E. Creighton; T. D. Creighton; J. Cripe; S. G. Crowder; A. Cumming; L. Cunningham; E. Cuoco; C. Cutler; K. Dahl; T. Dal Canton; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; L. Dartez; V. Dattilo; I. Dave; H. Daveloza; M. Davier; G. S. Davies; E. J. Daw; R. Day; D. DeBra; G. Debreczeni; J. Degallaix; M. De Laurentis; S. Delglise; W. Del Pozzo; T. Denker; T. Dent; H. Dereli; V. Dergachev; R. De Rosa; R. T. DeRosa; R. DeSalvo; S. Dhurandhar; M. Daz; L. Di Fiore; A. Di Lieto; I. Di Palma; A. Di Virgilio; G. Dojcinoski; V. Dolique; E. Dominguez; F. Donovan; K. L. Dooley; S. Doravari; R. Douglas; T. P. Downes; M. Drago; J. C. Driggers; Z. Du; M. Ducrot; S. Dwyer; T. Eberle; T. Edo; M. Edwards; M. Edwards; A. Effler; H. -B. Eggenstein; P. Ehrens; J. Eichholz; S. S. Eikenberry; R. Essick; T. Etzel; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; X. Fan; Q. Fang; S. Farinon; B. Farr; W. M. Farr; M. Favata; M. Fays; H. Fehrmann; M. M. Fejer; D. Feldbaum; I. Ferrante; E. C. Ferreira; F. Ferrini; F. Fidecaro; I. Fiori; R. P. Fisher; R. Flaminio; J. -D. Fournier; S. Franco; S. Frasca; F. Frasconi; Z. Frei; A. Freise; R. Frey; T. T. Fricke; P. Fritschel; V. V. Frolov; S. Fuentes-Tapia; P. Fulda; M. Fyffe; J. R. Gair; L. Gammaitoni; S. Gaonkar; F. Garufi; A. Gatto; N. Gehrels; G. Gemme; B. Gendre; E. Genin; A. Gennai; L. . Gergely; S. Ghosh; J. A. Giaime; K. D. Giardina; A. Giazotto; J. Gleason; E. Goetz; R. Goetz; L. Gondan; G. Gonzlez; N. Gordon; M. L. Gorodetsky; S. Gossan; S. Goler; R. Gouaty; C. Grf; P. B. Graff; M. Granata; A. Grant; S. Gras; C. Gray; G. Greco; R. J. S. Greenhalgh; A. M. Gretarsson; P. Groot; H. Grote; S. Grunewald; G. M. Guidi; C. J. Guido; X. Guo; K. Gushwa; E. K. Gustafson; R. Gustafson; J. Hacker; E. D. Hall; G. Hammond; M. Hanke; J. Hanks; C. Hanna; M. D. Hannam; J. Hanson; T. Hardwick; J. Harms; G. M. Harry; I. W. Harry; M. Hart; M. T. Hartman; C. -J. Haster; K. Haughian; S. Hee; A. Heidmann; M. Heintze; G. Heinzel; H. Heitmann; P. Hello; G. Hemming; M. Hendry; I. S. Heng; A. W. Heptonstall; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; D. Hofman; S. E. Hollitt; K. Holt; P. Hopkins; D. J. Hosken; J. Hough; E. Houston; E. J. Howell; Y. M. Hu; E. Huerta; B. Hughey; S. Husa; S. H. Huttner; M. Huynh; T. Huynh-Dinh; A. Idrisy; N. Indik; D. R. Ingram; R. Inta; G. Islas; J. C. Isler; T. Isogai; B. R. Iyer; K. Izumi; M. Jacobson; H. Jang; P. Jaranowski; S. Jawahar; Y. Ji; F. Jimnez-Forteza; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; Haris K

    2014-10-30T23:59:59.000Z

    In this paper we present the results of a coherent narrow-band search for continuous gravitational-wave signals from the Crab and Vela pulsars conducted on Virgo VSR4 data. In order to take into account a possible small mismatch between the gravitational wave frequency and two times the star rotation frequency, inferred from measurement of the electromagnetic pulse rate, a range of 0.02 Hz around two times the star rotational frequency has been searched for both the pulsars. No evidence for a signal has been found and 95$\\%$ confidence level upper limits have been computed both assuming polarization parameters are completely unknown and that they are known with some uncertainty, as derived from X-ray observations of the pulsar wind torii. For Vela the upper limits are comparable to the spin-down limit, computed assuming that all the observed spin-down is due to the emission of gravitational waves. For Crab the upper limits are about a factor of two below the spin-down limit, and represent a significant improvement with respect to past analysis. This is the first time the spin-down limit is significantly overcome in a narrow-band search.

  19. Spectrally Narrowed Edge Emission from Organic Light-Emitting Diodes: Evidence for Amplified Spontaneous Emission and Mirrorless Lasing

    E-Print Network [OSTI]

    Yun Tian; Zhengqing Gan; Zhaoqun Zhou; Ji-hun Kang; Q-Han Park; David W. Lynch; Joseph Shinar

    2007-01-14T23:59:59.000Z

    p-Conjugated materials, including small molecules and polymers, are attracting substantial attention as novel gain media in semiconductor lasers; they offer many potential advantages not achievable with conventional inorganic semiconductors: simple processing, low cost, easy tuneability of the spectrum, and large-area integration on flexible substrates. Optically pumped lasing action in various small molecular and polymeric p-conjugated materials has been demonstrated using several resonator configurations. However, electrically pumped organic semiconductor lasers, i.e., organic injection or diode lasers, remain elusive, presumably due to various loss mechanisms, e.g., charge (polaron)-induced absorption and metal electrode absorption. Here we report on evidence for amplified spontaneous emission (ASE), also known as mirrorless lasing (i.e., wherein some of the spontaneously emitted photons are amplified by stimulated emission during their propagation) in DC-driven small molecular organic light-emitting diodes (SMOLEDs). The evidence includes a dramatic spectral line narrowing, with a full width at half maximum (FWHM) of only 5 - 10 nm, and optical gain, of the edge-emission from SMOLEDs at room temperature. However, there is no clear indication of threshold behavior associated with this spectral narrowing. Nevertheless, this discovery should pave the way towards the realization of an organic diode laser.

  20. Narrow groove gas tungsten arc welding of ASTM A508 Class 4 steel for improved toughness properties

    SciTech Connect (OSTI)

    Penik, M.A. Jr. [Rensselaer Polytechnic Inst., Troy, NY (United States)

    1997-04-01T23:59:59.000Z

    Welding of heavy section steel has traditionally used the automatic submerged arc welding (ASAW) process because of the high deposition rates achievable. However, the properties, particularly fracture toughness, of the weld are often inferior when compared to base material. This project evaluated the use of narrow groove gas tungsten arc welding (GTAW) to improve weld material properties. The welding procedures were developed for ASTM A508 Class 4 base material using a 1% Ni filler material complying to AWS Specification A.23-90-EF3-F3-N. A narrow groove joint preparation was used in conjunction with the GTAW process so competitive fabrication rates could be achieved when compared to the ASAW process. Weld procedures were developed to refine weld substructure to achieve better mechanical properties. Two heaters of weld wire were used to examine the effects of minor filler metal chemistry differences on weld mechanical properties. Extensive metallographic evaluations showed excellent weld quality with a refined microstructure. Chemical analysis of the weld metal showed minimal weld dilution by the base metal. Mechanical testing included bend and tensile tests to ensure weld quality and strength. A Charpy impact energy curve versus temperature and fracture toughness curve versus temperature were developed for each weld wire heat. Results of fracture toughness and Charpy impact testing indicated an improved transition temperature closer to that of the base material properties.

  1. Techniques for Intravascular Foreign Body Retrieval

    SciTech Connect (OSTI)

    Woodhouse, Joe B.; Uberoi, Raman, E-mail: raman.uberoi@orh.nhs.uk [Oxford University Hospitals (United Kingdom)

    2013-08-01T23:59:59.000Z

    As endovascular therapies increase in frequency, the incidence of lost or embolized foreign bodies is increasing. The presence of an intravascular foreign body (IFB) is well recognized to have the potential to cause serious complications. IFB can embolize and impact critical sites such as the heart, with subsequent significant morbidity or mortality. Intravascular foreign bodies most commonly result from embolized central line fragments, but they can originate from many sources, both iatrogenic and noniatrogenic. The percutaneous approach in removing an IFB is widely perceived as the best way to retrieve endovascular foreign bodies. This minimally invasive approach has a high success rate with a low associated morbidity, and it avoids the complications related to open surgical approaches. We examined the characteristics, causes, and incidence of endovascular embolizations and reviewed the various described techniques that have been used to facilitate subsequent explantation of such materials.

  2. Body Centred Interaction in Immersive Virtual Environments

    E-Print Network [OSTI]

    Slater, Mel

    mean, for example, is there any truth for men in their sight and hearing? Or as poets are forever" with respect to all sensory modalities). Body tracking devices, such as electromagnetic sensors enable

  3. Data-driven human body morphing

    E-Print Network [OSTI]

    Zhang, Xiao

    2005-11-01T23:59:59.000Z

    This thesis presents an efficient and biologically informed 3D human body morphing technique through data-driven alteration of standardized 3D models. The anthropometric data is derived from a large empirical database and processed using principal...

  4. Alternate fuels for general-aviation aircraft with spark-ignition engines. Final report

    SciTech Connect (OSTI)

    Ferrara, A.M.

    1988-06-01T23:59:59.000Z

    This report describes the results of a study into the behavior of several alternate fuels that are under consideration for use in general aviation aircraft engines. The study consisted of a literature search and engine tests using a dynamometer. The literature search identified material compatibility problems and possible solutions to these problems. For the engine tests, a number of gasoline/alcohol blends were prepared using both ethanol and methanol in varying concentrations and the vapor-lock behavior was identified. Neat alcohols and methyl-tertiary-butyl ether were also used in the engine, and special operational conditions and problems were identified.

  5. ARM - Field Campaign - Aircraft Integration and Flight Testing of 4STAR

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032)8Li (59AJ76)ARM2,govCampaignsAircraft Integration and Flight Testing

  6. DOD-DOE Aircraft Petroleum Use Reduction Workshop | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube| Department of Energy - Facilitator GuideDISCLAIMER:DOD-DOE Aircraft

  7. A precise narrow-beam filter infrared radiometer and its use with lidar in the ARM Program

    SciTech Connect (OSTI)

    Platt, C.M.R.

    1992-05-01T23:59:59.000Z

    The first six months of the grant (December 1991--May 1992) have been taken up with the design and specification for the new narrow-beam radiometer. The radiometer will be built and tested at the Division of Atmospheric Research over the next three months. Improved algorithms for obtaining cloud extinction have also been developed. It is proposed during 1993 to use the radiometer in conjunction with a new CSIRO 3-wavelength lidar in the ARM PROBE experiment at Kavieng, New Guinea, which is a test mission under tropical conditions for the ARM CART Tropical West Pacific site, and is part of the TOGA COARE experiment. During the latter part of 1992, the radiometer will be tested thoroughly and tested at the Division of Atmospheric Research, Aspendale.

  8. Narrow Band Source of Transform-Limited Photon Pairs via Four-Wave Mixing in a Cold Atomic Ensemble

    E-Print Network [OSTI]

    Bharath Srivathsan; Gurpreet Kaur Gulati; Chng Mei Yuen Brenda; Gleb Maslennikov; Dzmitry Matsukevich; Christian Kurtsiefer

    2013-09-18T23:59:59.000Z

    We observe narrowband pairs of time-correlated photons of wavelengths 776\\,nm and 795\\,nm from non-degenerate four-wave mixing in a laser-cooled atomic ensemble of $^{87}${Rb} using a cascade decay scheme. Coupling the photon pairs into single mode fibers, we observe an instantaneous rate of 7700 pairs per second with silicon avalanche photodetectors, and an optical bandwidth below 30\\,MHz. Detection events exhibit a strong correlation in time ($g^{(2)}(\\tau=0)\\approx5800$), and a high coupling efficiency indicated by a pair-to-single ratio of 23%. The violation of the Cauchy-Schwarz inequality by a factor of $8.4\\times10^6$ indicates a strong non-classical correlation between the generated fields, while a Hanbury--Brown--Twiss experiment in the individual photons reveals their thermal nature. The narrow bandwidth and brightness of our source makes it ideal for interacting with atomic ensembles in quantum communication protocols.

  9. Quasi-Moseley's law for strong narrow bandwidth soft x-ray sources containing higher charge-state ions

    SciTech Connect (OSTI)

    Ohashi, Hayato, E-mail: ohashi@eng.u-toyama.ac.jp; Higashiguchi, Takeshi, E-mail: higashi@cc.utsunomiya-u.ac.jp; Suzuki, Yuhei; Arai, Goki; Otani, Yukitoshi; Yatagai, Toyohiko [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), Utsunomiya University, Utsunomiya, Tochigi 321-8585 (Japan); Li, Bowen [School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000 (China); Dunne, Padraig; O'Sullivan, Gerry [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Jiang, Weihua [Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188 (Japan); Endo, Akira [HiLASE Project, Institute of Physics, Academy of Sciences CR, Na Slovance 2, 18221 Prague 8 (Czech Republic); Sakaue, Hiroyuki A.; Kato, Daiji; Murakami, Izumi; Tamura, Naoki; Sudo, Shigeru; Suzuki, Chihiro [National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan); Koike, Fumihiro [Faculty of Science and Technology, Sophia University, Chiyoda, Tokyo 102-8554 (Japan)

    2014-06-09T23:59:59.000Z

    Bright narrow band emission observed in optically thin plasmas of high-Z elements in the extreme ultraviolet spectral region follows a quasi-Moseley's law. The peak wavelength can be expressed as ?=(21.8612.09)R{sub ?}{sup ?1}(Z?(23.232.87)){sup ?(1.520.12)}, where R{sub ?} is the Rydberg constant. The wavelength varies from 13.5?nm to 4.0?nm as the atomic number, Z, increases from Z?=?50 to Z?=?83. The range of emission wavelengths available from hot optically thin plasmas permits the development of bright laboratory-scale sources for applications including x-ray microscopy and x-ray absorption fine structure determination.

  10. NARROW DUST JETS IN A DIFFUSE GAS COMA: A NATURAL PRODUCT OF SMALL ACTIVE REGIONS ON COMETS

    SciTech Connect (OSTI)

    Combi, M. R.; Tenishev, V. M.; Rubin, M.; Fougere, N.; Gombosi, T. I., E-mail: mcombi@umich.edu [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 2455 Hayward Street, Ann Arbor, MI 48109-2143 (United States)

    2012-04-10T23:59:59.000Z

    Comets often display narrow dust jets but more diffuse gas comae when their eccentric orbits bring them into the inner solar system and sunlight sublimates the ice on the nucleus. Comets are also understood to have one or more active areas covering only a fraction of the total surface active with sublimating volatile ices. Calculations of the gas and dust distribution from a small active area on a comet's nucleus show that as the gas moves out radially into the vacuum of space it expands tangentially, filling much of the hemisphere centered on the active region. The dust dragged by the gas remains more concentrated over the active area. This explains some puzzling appearances of comets having collimated dust jets but more diffuse gaseous atmospheres. Our test case is 67P/Churyumov-Gerasimenko, the Rosetta mission target comet, whose activity is dominated by a single area covering only 4% of its surface.

  11. Summary of activities to remove the aircraft hydrant system (Panero site) at March Air Force Base, California

    SciTech Connect (OSTI)

    Hendrian, G.L.

    1993-06-01T23:59:59.000Z

    This document summarizes the activities to remove the underground storage tank farm (Panero Site, Operable Unit 3, Installation Restoration Program) used for aircraft refueling at March AFB. This summary report is organized into four sections: introduction--gives the scope, information summary, and composition of the report; planned work scope--states the scope of work as provided in the Performance Work Statement for Removal of Aircraft Fuel Hydrant System March Air Force Base, California; demolition results--records the accomplishments for each task defined in the Performance Work Statement; and recycling efforts--record the efforts to reduce generating unnecessary waste.

  12. Modeling of In-stream Tidal Energy Development and its Potential Effects in Tacoma Narrows, Washington, USA

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Wang, Taiping; Copping, Andrea E.; Geerlofs, Simon H.

    2014-10-01T23:59:59.000Z

    Understanding and providing proactive information on the potential for tidal energy projects to cause changes to the physical system and to key water quality constituents in tidal waters is a necessary and cost-effective means to avoid costly regulatory involvement and late stage surprises in the permitting process. This paper presents a modeling study for evaluating the tidal energy extraction and its potential impacts on the marine environment in a real world site - Tacoma Narrows of Puget Sound, Washington State, USA. An unstructured-grid coastal ocean model, fitted with a module that simulates tidal energy devices, was applied to simulate the tidal energy extracted by different turbine array configurations and the potential effects of the extraction at local and system-wide scales in Tacoma Narrows and South Puget Sound. Model results demonstrated the advantage of an unstructured-grid model for simulating the far-field effects of tidal energy extraction in a large model domain, as well as assessing the near-field effect using a fine grid resolution near the tidal turbines. The outcome shows that a realistic near-term deployment scenario extracts a very small fraction of the total tidal energy in the system and that system wide environmental effects are not likely; however, near-field effects on the flow field and bed shear stress in the area of tidal turbine farm are more likely. Model results also indicate that from a practical standpoint, hydrodynamic or water quality effects are not likely to be the limiting factor for development of large commercial-scale tidal farms. Results indicate that very high numbers of turbines are required to significantly alter the tidal system; limitations on marine space or other environmental concerns are likely to be reached before reaching these deployment levels. These findings show that important information obtained from numerical modeling can be used to inform regulatory and policy processes for tidal energy development.

  13. Relationship between satellite-derived vegetation indices and aircraft-based CO2 measurements

    SciTech Connect (OSTI)

    Cihlar, J.; Caramori, P.H.; Schuepp, P.H.; Desjardins, R.L.; Macpherson, J.I. (Canada Centre for Remote Sensing, Ottawa (Canada) McGill Univ., Montreal (Canada) Agriculture Canada, Centre for Land and Biological Resources Research, Ottawa (Canada) National Research Council of Canada, Inst. for Aerospace Research, Ottawa (Canada))

    1992-11-01T23:59:59.000Z

    The objective of this study was to analyze the relationship between satellite-derived vegetation indices and CO2 uptake, as an initial step in exploring the possibility of using a satellite-derived vegetation index as a measure of net photosynthesis. The study area included the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE) site located on the Konza prairie and adjacent area as well as a transect between Manhattan and Salina. One third of the transect exhibited vegetation and terrain characteristics similar to those on the FIFE site, whereas cultivated land predominated in the remaining portion of the 75-km-long flight line. In June, July, August, and October 1987, several CO2 data sets were obtained using the National Research Council of Canada's Twin Otter research aircraft. The normalized difference vegetation index (NDVI) and the simple ratio (SR) were computed from NOAA AVHRR data acquired as part of FIFE. Aircraft and satellite data were processed to obtain spatially coincident and locally representative flux values. Results show a linear relationship between NDVI and CO2 uptake during a single day; however, a nonlinear relationship emerged when all data sets were combined. The data from FIFE and the regional transect were consistent for one date but differed for other periods. Overall, about 60 percent of total variability in CO2 flux was accounted for by the NDVI and 74 percent by the SR. 14 refs.

  14. athletes recapture body: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Test, the Body Shape Questionnaire, the Body Attractiveness subscale of the Physical Self Perception Profile, the Eating Disorder Inventory Symptom Checklist, the Athletic Identity...

  15. A new airborne formaldehyde measurement technique was developed and deployed on board the DOE G1 aircraft during a four-week long 1998 summer ozone study in Phoenix,

    E-Print Network [OSTI]

    (HPLC). The aircraft instrument consists mainly of (1) a 28-turn glass coil scrubber, (2) a heated zone

  16. The 2011 Cessna Aircraft Company/Raytheon Missile Systems Design/Build/Fly Competition Flyoff was held at TIMPA Field in Tucson, AZ on the weekend of April 15-17, 2011. This was the 15th

    E-Print Network [OSTI]

    Southern California, University of

    The 2011 Cessna Aircraft Company/Raytheon Missile Systems Design/Build/Fly Competition Flyoff Cessna Aircraft, Raytheon Missile Systems, and the AIAA sponsoring technical committees: Applied also go to the corporate Sponsors: Raytheon Missile Systems and Cessna Aircraft Company, and also

  17. High thermal conductivity aluminum nitride ceramic body

    SciTech Connect (OSTI)

    Huseby, I. C.; Bobik, C. F.

    1985-10-15T23:59:59.000Z

    A process for producing a polycrystalline aluminum nitride ceramic body having a porosity of less than about 10% by volume of said body and a thermal conductivity greater than 1.0 W/cm-K at 22/sup 0/ C., which comprises forming a mixture comprised of aluminum nitride powder and an yttrium additive selected from the group consisting of yttrium, yttrium hydride, yttrium nitride and mixtures thereof, said aluminum nitride and yttrium additive having a predetermined oxygen content, said mixture having a composition wherein the equivalent % of yttrium, aluminum, nitrogen and oxygen shapping said mixture into a compact and sintering said compact at a temperature ranging from about 1850/sup 0/ C. to about 2170/sup 0/ C. in an atmosphere selected from the group consisting of nitrogen, argon, hydrogen and mixtures thereof to produce said polycrystalline body.

  18. Evidence for Narrow Resonant Structures at $W ~\\sim 1.68$ and $W \\sim 1.72$ GeV in Real Compton Scattering off the Proton

    E-Print Network [OSTI]

    Kuznetsov, V; Bellini, V; Gervino, G; Ghio, F; Giardina, G; Kim, W; Mandaglio, G; Sperduto, M L; Sutera, C

    2015-01-01T23:59:59.000Z

    First measurement of the beam asymmetry $\\Sigma$ for Compton scattering off the proton in the energy range $E_{\\gamma}=0.85 - 1.25$ GeV is presented. The data reveals two narrow structures at $E_{\\gamma}= 1.036$ and $E_{\\gamma}=1.119$ GeV. They may signal either narrow resonances with the masses near $1.68$ and $1.72$ GeV, or can be generated by the sub-threshold $K\\Lambda$ and $\\omega p$ production. Their decisive identification requires additional theoretical and experimental efforts.

  19. Presented at ION GPS-01, Salt Lake City, September 11-14, 2001 1 P3 Aircraft Buffeting Measurement

    E-Print Network [OSTI]

    Calgary, University of

    Warfare Center Patuxent River, Maryland BIOGRAPHIES Dr. M. Elizabeth Cannon is Professor of Geomatics is an electronics engineer at the Naval Air Warfare Center Aircraft Division, Patuxent River, Maryland. He has been, Patuxent River, Maryland. He has been involved with noise reduction for airborne magnetic systems and monte

  20. Acoustic remote sensing of the sea bed using propeller noise from a light aircraft Michael J. Buckingham

    E-Print Network [OSTI]

    Buckingham, Michael

    - 1 - Acoustic remote sensing of the sea bed using propeller noise from a light aircraft Michael J instrumentation is deployed from a surface ship or, in near-coastal waters, fixed installations such as towers and piers. In certain circumstances, however, a conventional deployment platform is not practicable

  1. Proceedings of the 2007 Aging Aircraft Conference Cost Model for Assessing the Transition to Lead-Free Electronics

    E-Print Network [OSTI]

    Sandborn, Peter

    Proceedings of the 2007 Aging Aircraft Conference Cost Model for Assessing the Transition to Lead the cost ramifications of the transition from tin- lead to lead-free electronic parts. All tin-lead, all lead-free and mixed assembly approaches are considered. The model makes basic assumptions of a fixed

  2. Absorption of solar radiation by the atmosphere as determined using satellite, aircraft, and surface data during the

    E-Print Network [OSTI]

    Dong, Xiquan

    Absorption of solar radiation by the atmosphere as determined using satellite, aircraft of 0.33 0.04 for the total atmosphere (surface to top). The absorptance of solar radiation estimated more solar radiation than is predicted by theory [e.g., Stephens and Tsay 1990]. Recently, and nearly

  3. Enhanced functions supporting process planning for aircraft structural parts Ramy HARIK*, Vincent CAPPONI**, Muriel Lombard*, Gabriel RIS*

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Enhanced functions supporting process planning for aircraft structural parts Ramy HARIK*, Vincent CAPPONI**, Muriel Lombard*, Gabriel RIS* *CRAN, Research Center for Automatic Control, Nancy, CNRS UMR, France Phone: +33-3-83684419, Fax: +33-3-83684437 ** Institute of Production and Robotics, Ecole

  4. Quantum Chaos and the Black Body Radiation

    E-Print Network [OSTI]

    Giulio Casati

    2000-11-16T23:59:59.000Z

    We discuss a mechanical model which mimics the main features of the radiation matter interaction in the black body problem. The pure classical dynamical evolution, with a simple discretization of the action variables, leads to the Stefan- Boltzmann law and to the Planck distribution without any additional statistical assumption.

  5. Compton Scattering on Black Body Photons

    E-Print Network [OSTI]

    Lowell S. Brown; Ronald S. Steinke

    1996-09-27T23:59:59.000Z

    We examine Compton scattering of electrons on black body photons in the case where the electrons are highly relativistic, but the center of mass energy is small in comparison with the electron mass. We derive the partial lifetime of electrons in the LEP accelerator due to this form of scattering in the vacuum beam pipe and compare it with previous results.

  6. PML nuclear bodies: dynamic sensors of DNA

    E-Print Network [OSTI]

    Dellaire, Graham

    the major structural component of the PML NB is the PML protein, the nuclear antigen Sp100, a major auto (PODs) to describe these bodies.(10) PML and Sp100 are founding members of a large family of proteinsEssays 26.9 963 Programme in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada Funding

  7. Gravitational stability of finite massive bodies

    E-Print Network [OSTI]

    A. W. Zaharow

    2006-10-16T23:59:59.000Z

    Jeans instability of finite massive bodies at hydrostatic equilibrium is studied. Differential equation governing the evolution of infinitesimal disturbances is derived. We take into account radial inhomogeneity of mass density and other fluid parameters at the equilibrium state. Dispersion relation and a simple analytical formula, generalizing the Jeans criterion of instability, are derived.

  8. Method for producing microporous metal bodies

    DOE Patents [OSTI]

    Danko, Joseph C. (Danville, CA)

    1982-01-01T23:59:59.000Z

    Tungsten is vapor-deposited by hydrogen reduction of tungsten hexafluoride (WF.sub.6) to produce a tungsten body having from 40 to 100 ppm fluorine. The tungsten is then heated under vacuum to produce grain boundary porosity for a sufficient period of time to allow the pores along the grain boundaries to become interconnected.

  9. New nuclear three-body clusters ?{NN}

    E-Print Network [OSTI]

    Vladimir B. Belyaev; Werner Sandhas; Ivan I. Shlyk

    2007-07-31T23:59:59.000Z

    Binding energies of three-body systems of the type \\phi+2N are estimated. Due to the strong attraction between \\phi-meson and nucleon, suggested in different approaches, bound states can appear in systems like \\phi+np (singlet and triplet) and \\phi+pp. This indicates the principal possibility of the formation of new nuclear clusters.

  10. The Evolution of Trilobite Body Patterning

    E-Print Network [OSTI]

    The Evolution of Trilobite Body Patterning Nigel C. Hughes Department of Earth Sciences, University of arthropod evolution and devel- opment. The Cambrian diversification of trilobites displayed mod- ifications diversity within the clade, did so within a nar- rower range of trunk conditions. Trilobite evolution

  11. ACE 1992 summary data report: Aircraft measurements of meteorological parameters and SF6. Technical memo

    SciTech Connect (OSTI)

    Watkins, B.A.; Boatman, J.F.; Wellman, D.L.; Wilkison, S.W.

    1993-02-01T23:59:59.000Z

    Meteorological parameters and sulfur hexafluoride (SF6) were measured with the NOAA King Air C-90 aircraft during October 1992 in central Florida as part of the Air Force Technical Applications Command (AFTAC) Airborne Collection Equipment (ACE 1992) experiment. Airborne sampling was used to locate a plume containing SF6 as a tracer. Before take off, a trajectory model was used to provide the expected plume path. An onboard tracking program gave current predictions of the location of the plume, based on the location of tetroons expected to travel with the plume. Once the plume was located, samples were collected of triethyl phosphate oxide and methyl salicylate, which had been released with the SF6. This report discusses the objectives of ACE 1992, the instrumentation used and the data obtained by the NOAA King Air ground and airborne operation.

  12. Electrical Generation for More-Electric Aircraft Using Solid Oxide Fuel Cells

    SciTech Connect (OSTI)

    Whyatt, Greg A.; Chick, Lawrence A.

    2012-04-01T23:59:59.000Z

    This report examines the potential for Solid-Oxide Fuel Cells (SOFC) to provide electrical generation on-board commercial aircraft. Unlike a turbine-based auxiliary power unit (APU) a solid oxide fuel cell power unit (SOFCPU) would be more efficient than using the main engine generators to generate electricity and would operate continuously during flight. The focus of this study is on more-electric aircraft which minimize bleed air extraction from the engines and instead use electrical power obtained from generators driven by the main engines to satisfy all major loads. The increased electrical generation increases the potential fuel savings obtainable through more efficient electrical generation using a SOFCPU. However, the weight added to the aircraft by the SOFCPU impacts the main engine fuel consumption which reduces the potential fuel savings. To investigate these relationships the Boeing 7878 was used as a case study. The potential performance of the SOFCPU was determined by coupling flowsheet modeling using ChemCAD software with a stack performance algorithm. For a given stack operating condition (cell voltage, anode utilization, stack pressure, target cell exit temperature), ChemCAD software was used to determine the cathode air rate to provide stack thermal balance, the heat exchanger duties, the gross power output for a given fuel rate, the parasitic power for the anode recycle blower and net power obtained from (or required by) the compressor/expander. The SOFC is based on the Gen4 Delphi planar SOFC with assumed modifications to tailor it to this application. The size of the stack needed to satisfy the specified condition was assessed using an empirically-based algorithm. The algorithm predicts stack power density based on the pressure, inlet temperature, cell voltage and anode and cathode inlet flows and compositions. The algorithm was developed by enhancing a model for a well-established material set operating at atmospheric pressure to reflect the effect of elevated pressure and to represent the expected enhancement obtained using a promising cell material set which has been tested in button cells but not yet used to produce full-scale stacks. The predictions for the effect of pressure on stack performance were based on literature. As part of this study, additional data were obtained on button cells at elevated pressure to confirm the validity of the predictions. The impact of adding weight to the 787-8 fuel consumption was determined as a function of flight distance using a PianoX model. A conceptual design for a SOFC power system for the Boeing 787 is developed and the weight estimated. The results indicate that the power density of the stacks must increase by at least a factor of 2 to begin saving fuel on the 787 aircraft. However, the conceptual design of the power system may still be useful for other applications which are less weight sensitive.

  13. Standard Test Method for Stress-Corrosion of Titanium Alloys by Aircraft Engine Cleaning Materials

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2006-01-01T23:59:59.000Z

    1.1 This test method establishes a test procedure for determining the propensity of aircraft turbine engine cleaning and maintenance materials for causing stress corrosion cracking of titanium alloy parts. 1.2 The evaluation is conducted on representative titanium alloys by determining the effect of contact with cleaning and maintenance materials on tendency of prestressed titanium alloys to crack when subsequently heated to elevated temperatures. 1.3 Test conditions are based upon manufacturer's maximum recommended operating solution concentration. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see and .

  14. Antimisting-fuel research and development for commercial aircraft. Final summary report

    SciTech Connect (OSTI)

    Yaffee, M.L.

    1986-04-01T23:59:59.000Z

    This report covers the research, development, testing, and evaluation conducted by the Federal Aviation Administration in pursuit of an effective, feasible antimisting agent for kerosene jet fuels that would prevent or reduce the dangers of postcrash, fuel-mist fires. For the past eight years, most of this effort was focused on a high-molecular-weight polymer, FM-9, as a representative agent to prove the antimisting-fuel concept. The results of this work indicate that the goal is achievable: Jet fuel can be modified to provide a significant degree of protection against postcrash fires in impact-survivable accidents. Additional development and testing would be required before the fuel is operationally acceptable. It would be necessary to make some modifications in fuel-handling procedures and hardware in aircraft and at airports. But there appear to be no technically insurmountable problems.

  15. Motion of spinning test bodies in Kerr spacetime

    E-Print Network [OSTI]

    Eva Hackmann; Claus Lmmerzahl; Yuri N. Obukhov; Dirk Puetzfeld; Isabell Schaffer

    2014-09-23T23:59:59.000Z

    We investigate the motion of spinning test bodies in General Relativity. By means of a multipolar approximation method for extended test bodies we derive the equations of motion, and classify the orbital motion of pole-dipole test bodies in the equatorial plane of the Kerr geometry. An exact expression for the periastron shift of a spinning test body is given. Implications of test body spin corrections are studied and compared with the results obtained by means of other approximation schemes.

  16. POD of ultrasonic detection of synthetic hard alpha inclusions in titanium aircraft engine forgings

    SciTech Connect (OSTI)

    Thompson, R. B. [Center for Nondestructive Evaluation and Departments of Materials Science and Aerospace Engineering, Iowa State University, Ames, IA 50011 (United States); Meeker, W. Q. [Center for Nondestructive Evaluation and Department of Statistics, Iowa State University, Ames, IA 50011 (United States); Brasche, L. J. H. [Center for Nondestructive Evaluation, Iowa State University, Ames, IA 50011 (United States)

    2011-06-23T23:59:59.000Z

    The probability of detection (POD) of inspection techniques is a key input to estimating the lives of structural components such as aircraft engines. This paper describes work conducted as a part of the development of POD curves for the ultrasonic detection of synthetic hard alpha (SHA) inclusions in titanium aircraft engine forgings. The sample upon which the POD curves are to be based contains four types of right circular SHAs that have been embedded in a representative titanium forging, as well as a number of flat bottomed holes (FBHs). The SHAs were of two sizes, number 3 and number 5, with each size including seeds with nominal nitrogen concentrations of both 3 and 17 wt. %. The FBHs included sizes of number 1, number 3, and number 5. This discreteness of the data poses a number of challenges to standard processes for determining POD. For example, at each concentration of nitrogen, there are only two sizes, with 10 inspection opportunities each. Fully empirical, standard methodologies such as a circumflex versus a provide less than an ideal framework for such an analysis. For example, there is no way to describe the beam limiting effect whereby the signal no longer increases the flaw grows larger than the beam, one can only determine POD at the two concentration levels present in the block, and confidence bounds tend to be broad because of the limited data available for each case. In this paper, we will describe strategies involving the use of physics-based models to overcome these difficulties by allowing the data from all reflectors to be analyzed by a single statistical model. Included will be a discussion of the development of the physics-based model, its comparison to the experimental data (obtained at multiple sites with multiple operators) and its implications regarding the statistical analysis, whose details will be given in a separate article by Li et al. in this volume.

  17. Evidence for a Narrow Near-Threshold Structure in the J/ psi phi Mass Spectrum in B+-->J/ psi phi K+ Decays

    E-Print Network [OSTI]

    Xie, Si

    Evidence is reported for a narrow structure near the J/?? threshold in exclusive B+?J/??K+ decays produced in (p)over-bar p collisions at ?s=1.96??TeV. A signal of 145 events, with statistical significance in excess of ...

  18. A panchromatic view of relativistic jets in gamma-ray emitting narrow-line Seyfert 1 galaxies

    E-Print Network [OSTI]

    D'Ammando, F; Finke, J; Giroletti, M; Larsson, J

    2015-01-01T23:59:59.000Z

    Before the launch of the Fermi satellite only two classes of Active Galactic Nuclei (AGN) were known to generate relativistic jets and thus to emit up to the gamma-ray energy range: blazars and radio galaxies, both hosted in giant elliptical galaxies. The first four years of observations by the Large Area Telescope (LAT) on board Fermi confirmed that these two populations represent the most numerous identified sources in the extragalactic gamma-ray sky, but the discovery of variable gamma-ray emission from 5 radio-loud Narrow-Line Seyfert 1 (NLSy1) galaxies revealed the presence of a possible emerging third class of AGN with relativistic jets. Considering that NLSy1 are thought to be hosted in spiral galaxies, this finding poses intriguing questions about the nature of these objects, the knowledge of the development of relativistic jets, and the evolution of radio-loud AGN. In this context, the study of the radio-loud NLSy1 from radio to gamma-rays has received increasing attention. Here we discuss the radio-...

  19. Variability of Optical \\ion{Fe}{ii} Complex in Narrow-Line Seyfert 1 Galaxy NGC 4051

    E-Print Network [OSTI]

    J. Wang; J. Y. Wei; X. T. He

    2005-04-05T23:59:59.000Z

    The variability of optical FeII blends in NGC 4051 is examined from spectra extracted from the AGN Watch program.In our analysis, the FeII complex are subtracted and measured with the following results. Firstly, the FeII variations were detected in NGC 4051 during a 3-year period. The identified FeII variations followed the variations in continuum closely. Secondly, the EW of FeII is reported to increase with the rising continuum flux, which is consistent with previous claims that there is no convincing Baldwin Effect in optical FeII. Thirdly, by comparing the variations of H$\\beta$ and FeII, we find that RFe scales with continuum flux as $\\rm{R_{Fe}\\propto (5.0\\pm0.8) \\log(L/M)}$, which is significantly different from the theoretical expectations. Finally, in six selected Seyferts, four out of five Narrow-Line Seyfert 1 galaxies present positive correlation between RFe and the continuum flux. The negative correlations are identified in the remaindng two objects that have relatively broad profiles of H$\\beta$ ($\\rm{FWHM>1500 km\\ s^{-1}}$).We argue that the difference of electron density of broad line clouds and/or variability behavior of incident high-energy radiation can explain the dichotomy in variability behavior of RFe.

  20. WISE colours and star-formation in the host galaxies of radio-loud narrow-line Seyfert 1

    E-Print Network [OSTI]

    Caccianiga, A; Ballo, L; Foschini, L; Maccacaro, T; Della Ceca, R; Severgnini, P; Marcha, M J; Mateos, S; Sani, E

    2015-01-01T23:59:59.000Z

    We investigate the mid-infrared properties of the largest (42 objects) sample of radio-loud narrow-line Seyfert 1 (RL NLS1) collected to date, using data from the Wide-field Infrared Survey Explorer (WISE). We analyse the mid-IR colours of these objects and compare them to what is expected from different combinations of AGN and galaxy templates. We find that, in general, the host-galaxy emission gives an importan contribution to the observed mid-IR flux in particular at the longest wavelengths (W3, at 12micron, and W4, at 22micron). In about half of the sources (22 objects) we observe a very red mid-IR colour (W4-W3>2.5) that can be explained only using a starburst galaxy template (M82). Using the 22micron luminosities, corrected for the AGN contribution, we have then estimated the star-formation rate for 20 of these "red" RL NLS1, finding values ranging from 10 to 500 Msun/y. For the RL NLS1 showing bluer colours, instead, we cannot exclude the presence of a star-forming host galaxy although, on average, we ...

  1. Toward Photochemical Water Splitting Using Band-Gap-Narrowed Semiconductors and Transition-Metal Based Molecular Catalysts

    SciTech Connect (OSTI)

    Muckerman,J.T.; Rodriguez, J.A.; Fujita, E.

    2009-06-07T23:59:59.000Z

    We are carrying out coordinated theoretical and experimental studies of toward photochemical water splitting using band-gap-narrowed semiconductors (BGNSCs) with attached multi-electron molecular water oxidation and hydrogen production catalysts. We focus on the coupling between the materials properties and the H{sub 2}O redox chemistry, with an emphasis on attaining a fundamental understanding of the individual elementary steps in the following four processes: (1) Light-harvesting and charge-separation of stable oxide or oxide-derived semiconductors for solar-driven water splitting, including the discovery and characterization of the behavior of such materials at the aqueous interface; (2) The catalysis of the four-electron water oxidation by dinuclear hydroxo transition-metal complexes with quinonoid ligands, and the rational search for improved catalysts; (3) Transfer of the design principles learned from the elucidation of the DuBois-type hydrogenase model catalysts in acetonitrile to the rational design of two-electron hydrogen production catalysts for aqueous solution; (4) Combining these three elements to examine the function of oxidation catalysts on BGNSC photoanode surfaces and hydrogen production catalysts on cathode surfaces at the aqueous interface to understand the challenges to the efficient coupling of the materials functions.

  2. Effects of multiple occupancy and inter-particle interactions on selective transport through narrow channels: theory versus experiment

    E-Print Network [OSTI]

    Anton Zilman

    2008-11-17T23:59:59.000Z

    Many biological and artificial transport channels function without direct input of metabolic energy during a transport event and without structural rearrangements involving transitions from a 'closed' to an 'open' state. Nevertheless, such channels are able to maintain efficient and selective transport. It has been proposed that attractive interactions between the transported molecules and the channel can increase the transport efficiency and that the selectivity of such channels can be based on the strength of the interaction of the specifically transported molecules with the channel. Herein, we study the transport through narrow channels in a framework of a general kinetic theory, which naturally incorporates multi-particle occupancy of the channel and non-single-file transport. We study how the transport efficiency and the probability of translocation through the channel are affected by inter-particle interactions in the confined space inside the channel, and establish conditions for selective transport. We compare the predictions of the model with the available experimental data - and find good semi-quantitative agreement. Finally, we discuss applications of the theory to the design of artificial nano-molecular sieves.

  3. Optical and ultraviolet observations of the narrow-lined type Ia SN 2012fr in NGC 1365

    SciTech Connect (OSTI)

    Zhang, Ju-Jia; Bai, Jin-Ming; Wang, Bo; Liu, Zheng-Wei [Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650011 (China); Wang, Xiao-Feng; Zhao, Xu-Lin; Chen, Jun-Cheng [Physics Department and Tsinghua Center for Astrophysics (THCA), Tsinghua University, Beijing 100084 (China); Zhang, Tian-Meng, E-mail: jujia@ynao.ac.cn, E-mail: baijinming@ynao.ac.cn, E-mail: wang_xf@mail.tsinghua.edu.cn [National Astronomical Observatories of China (NAOC), Chinese Academy of Sciences, Beijing 100012 (China)

    2014-07-01T23:59:59.000Z

    Extensive optical and ultraviolet (UV) observations of the type Ia supernova (SN Ia) 2012fr are presented in this paper. It has a relatively high luminosity, with an absolute B-band peak magnitude of about 19.5 mag and a smaller post-maximum decline rate than normal SNe Ia (e.g., ?m {sub 15}(B) =0.85 0.05 mag). Based on the UV and optical light curves, we derived that a {sup 56}Ni mass of about 0.88 M {sub ?} was synthesized in the explosion. The earlier spectra are characterized by noticeable high-velocity features of Si II ?6355 and Ca II with velocities in the range of ?22, 000-25, 000 km s{sup 1}. At around the maximum light, these spectral features are dominated by the photospheric components which are noticeably narrower than normal SNe Ia. The post-maximum velocity of the photosphere remains almost constant at ?12,000 km s{sup 1} for about one month, reminiscent of the behavior of some luminous SNe Ia like SN 1991T. We propose that SN 2012fr may represent a subset of the SN 1991T-like SNe Ia viewed in a direction with a clumpy or shell-like structure of ejecta, in terms of a significant level of polarization reported in Maund et al. in 2013.

  4. Search for narrow resonances using the dijet mass spectrum in pp collisions at ?s=8??TeV

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Aguilo, E.; Bergauer, T.; Dragicevic, M.; Er, J.; Fabjan, C.; Friedl, M.; Frhwirth, R.; Ghete, V. M.; Hrmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knnz, V.; Krammer, M.; Krtschmer, I.; Liko, D.; Mikulec, I.; Pernicka, M.; Rabady, D.; Rahbaran, B.; Rohringer, C.; Rohringer, H.; Schfbeck, R.; Strauss, J.; Taurok, A.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; Bansal, M.; Bansal, S.; Cornelis, T.; De Wolf, E. A.; Janssen, X.; Luyckx, S.; Mucibello, L.; Ochesanu, S.; Roland, B.; Rougny, R.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Blekman, F.; Blyweert, S.; DHondt, J.; Gonzalez Suarez, R.; Kalogeropoulos, A.; Maes, M.; Olbrechts, A.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Onsem, G. P.; Villella, I.; Clerbaux, B.; De Lentdecker, G.; Dero, V.; Gay, A. P. R.; Hreus, T.; Lonard, A.; Marage, P. E.; Mohammadi, A.; Reis, T.; Thomas, L.; Vander Velde, C.; Vanlaer, P.; Wang, J.; Adler, V.; Beernaert, K.; Cimmino, A.; Costantini, S.; Garcia, G.; Grunewald, M.; Klein, B.; Lellouch, J.; Marinov, A.; Mccartin, J.; Ocampo Rios, A. A.; Ryckbosch, D.; Sigamani, M.; Strobbe, N.; Thyssen, F.; Tytgat, M.; Walsh, S.; Yazgan, E.; Zaganidis, N.; Basegmez, S.; Bruno, G.; Castello, R.; Ceard, L.; Delaere, C.; du Pree, T.; Favart, D.; Forthomme, L.; Giammanco, A.; Hollar, J.; Lemaitre, V.; Liao, J.; Militaru, O.; Nuttens, C.; Pagano, D.; Pin, A.; Piotrzkowski, K.; Selvaggi, M.; Vizan Garcia, J. M.; Beliy, N.; Caebergs, T.; Daubie, E.; Hammad, G. H.; Alves, G. A.; Correa Martins Junior, M.; Martins, T.; Pol, M. E.; Souza, M. H. G.; Ald Jnior, W. L.; Carvalho, W.; Chinellato, J.; Custdio, A.; Da Costa, E. M.; De Jesus Damiao, D.; De Oliveira Martins, C.; Fonseca De Souza, S.; Malbouisson, H.; Malek, M.; Matos Figueiredo, D.; Mundim, L.; Nogima, H.; Prado Da Silva, W. L.; Santoro, A.; Soares Jorge, L.; Sznajder, A.; Tonelli Manganote, E. J.; Vilela Pereira, A.; Anjos, T. S.; Bernardes, C. A.; Dias, F. A.; Tomei, T. R. Fernandez Perez; Gregores, E. M.; Lagana, C.; Marinho, F.; Mercadante, P. G.; Novaes, S. F.; Padula, Sandra S.; Genchev, V.; Iaydjiev, P.; Piperov, S.; Rodozov, M.; Stoykova, S.; Sultanov, G.; Tcholakov, V.; Trayanov, R.; Vutova, M.; Dimitrov, A.; Hadjiiska, R.; Kozhuharov, V.; Litov, L.; Pavlov, B.; Petkov, P.; Bian, J. G.; Chen, G. M.; Chen, H. S.; Jiang, C. H.; Liang, D.; Liang, S.; Meng, X.; Tao, J.; Wang, J.; Wang, X.; Wang, Z.; Xiao, H.; Xu, M.; Zang, J.; Zhang, Z.; Asawatangtrakuldee, C.; Ban, Y.; Guo, Y.; Li, W.; Liu, S.; Mao, Y.; Qian, S. J.; Teng, H.; Wang, D.; Zhang, L.; Zou, W.; Avila, C.; Carrillo Montoya, C. A.; Gomez, J. P.; Gomez Moreno, B.; Osorio Oliveros, A. F.; Sanabria, J. C.; Godinovic, N.; Lelas, D.; Plestina, R.; Polic, D.; Puljak, I.; Antunovic, Z.; Kovac, M.; Brigljevic, V.; Duric, S.; Kadija, K.; Luetic, J.; Mekterovic, D.; Morovic, S.; Tikvica, L.; Attikis, A.; Mavromanolakis, G.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P. A.; Finger, M.; Finger, M.; Assran, Y.; Elgammal, S.; Ellithi Kamel, A.; Kuotb Awad, A. M.; Mahmoud, M. A.; Radi, A.; Kadastik, M.; Mntel, M.; Murumaa, M.; Raidal, M.; Rebane, L.; Tiko, A.; Eerola, P.; Fedi, G.; Voutilainen, M.; Hrknen, J.; Heikkinen, A.; Karimki, V.; Kinnunen, R.; Kortelainen, M. J.; Lampn, T.; Lassila-Perini, K.; Lehti, S.; Lindn, T.; Luukka, P.; Menp, T.; Peltola, T.; Tuominen, E.; Tuominiemi, J.; Tuovinen, E.; Ungaro, D.; Wendland, L.; Korpela, A.; Tuuva, T.; Besancon, M.; Choudhury, S.; Couderc, F.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J. L.; Ferri, F.; Ganjour, S.; Givernaud, A.; Gras, P.; Hamel de Monchenault, G.; Jarry, P.; Locci, E.; Malcles, J.; Millischer, L.; Nayak, A.; Rander, J.; Rosowsky, A.; Titov, M.; Baffioni, S.; Beaudette, F.; Benhabib, L.; Bianchini, L.; Bluj, M.; Busson, P.; Charlot, C.; Daci, N.; Dahms, T.; Dalchenko, M.; Dobrzynski, L.; Florent, A.; Granier de Cassagnac, R.; Haguenauer, M.; Min, P.; Mironov, C.; Naranjo, I. N.; Nguyen, M.; Ochando, C.; Paganini, P.; Sabes, D.; Salerno, R.; Sirois, Y.; Veelken, C.; Zabi, A.; Agram, J.-L.; Andrea, J.; Bloch, D.; Bodin, D.; Brom, J.-M.; Chabert, E. C.; Collard, C.; Conte, E.; Drouhin, F.; Fontaine, J.-C.; Gel, D.; Goerlach, U.; Juillot, P.; Le Bihan, A.-C.; Van Hove, P.; Beauceron, S.; Beaupere, N.; Bondu, O.; Boudoul, G.; Brochet, S.; Chasserat, J.; Chierici, R.; Contardo, D.; Depasse, P.; El Mamouni, H.; Fay, J.; Gascon, S.; Gouzevitch, M.; Ille, B.; Kurca, T.; Lethuillier, M.; Mirabito, L.; Perries, S.; Sgandurra, L.; Sordini, V.; Tschudi, Y.; Verdier, P.; Viret, S.; Tsamalaidze, Z.; Autermann, C.; Beranek, S.; Calpas, B.

    2013-06-01T23:59:59.000Z

    Results are presented of a search for the production of new particles decaying to pairs of partons (quarks, antiquarks, or gluons), in the dijet mass spectrum in proton-proton collisions at s?=8??TeV. The data sample corresponds to an integrated luminosity of 4.0??fb?1, collected with the CMS detector at the LHC in 2012. No significant evidence for narrow resonance production is observed. Upper limits are set at the 95% confidence level on the production cross section of hypothetical new particles decaying to quark-quark, quark-gluon, or gluon-gluon final states. These limits are then translated into lower limits on the masses of new resonances in specific scenarios of physics beyond the standard model. The limits reach up to 4.8 TeV, depending on the model, and extend previous exclusions from similar searches performed at lower collision energies. For the first time mass limits are set for the RandallSundrum graviton model in the dijet channel.

  5. The first gamma-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619

    E-Print Network [OSTI]

    D'Ammando, F; Larsson, J; Giroletti, M

    2015-01-01T23:59:59.000Z

    We report the discovery of gamma-ray emission from the narrow-line Seyfert 1 (NLSy1) galaxy FBQS J1644+2619 by the Large Area Telescope on board the Fermi satellite. The Third Fermi LAT Source catalogue reports an unidentified gamma-ray source, detected over the first four years of Fermi operation, 0.23 deg from the radio position of the NLSy1. Analysing 76 months of gamma-ray data (2008 August 4-2014 December 31) we are able to better constrain the localization of the gamma-ray source. The new position of the gamma-ray source is 0.05 deg from FBQS J1644+2619, suggesting a spatial association with the NLSy1. This is the sixth NLSy1 detected at high significance by Fermi-LAT so far. Notably, a significant increase of activity was observed in gamma-rays from FBQS J1644+2619 during 2012 July-October, and an increase of activity in V-band was detected by the Catalina Real-Time Sky Survey in the same period.

  6. Narrow gap laser welding

    DOE Patents [OSTI]

    Milewski, John O. (Santa Fe, NM); Sklar, Edward (Santa Fe, NM)

    1998-01-01T23:59:59.000Z

    A laser welding process including: (a) using optical ray tracing to make a model of a laser beam and the geometry of a joint to be welded; (b) adjusting variables in the model to choose variables for use in making a laser weld; and (c) laser welding the joint to be welded using the chosen variables.

  7. Narrow gap laser welding

    DOE Patents [OSTI]

    Milewski, J.O.; Sklar, E.

    1998-06-02T23:59:59.000Z

    A laser welding process including: (a) using optical ray tracing to make a model of a laser beam and the geometry of a joint to be welded; (b) adjusting variables in the model to choose variables for use in making a laser weld; and (c) laser welding the joint to be welded using the chosen variables. 34 figs.

  8. Body composition and body mass index in 5-year-old children

    E-Print Network [OSTI]

    Rogg, Elizabeth (Betsy)

    2013-05-31T23:59:59.000Z

    have compared BMI-for-age percentiles to more valid means of measuring body fat in children such as dual energy x- ray absorptiometry (DXA), bioelectrical impedance analysis (BIA), computerized axial tomography (CT), underwater weighing...

  9. Large Lagrangian Actions on Elliptical Solutions of 2-Body and 3-Body Problems with Fixed Energies

    E-Print Network [OSTI]

    Ying Lv; Shiqing Zhang

    2011-12-04T23:59:59.000Z

    Based on the works of Gordon ([4]) and Zhang-Zhou([8])) on the variational minimizing properties for Keplerian orbits and Lagrangian solutions of Newtonian 2-body and 3-body problems, we use the constrained variational principle of Ambrosetti-Coti Zelati ([1]) to compute the Lagrangian actions on Keplerian and Lagrangian elliptical solutions with fixed energies, we also find an interesting relationship between period and energy for Lagrangian elliptical solutions with Newtonian potentials.

  10. Few-body models for nuclear astrophysics

    SciTech Connect (OSTI)

    Descouvemont, P., E-mail: pdesc@ulb.ac.be [Physique Nuclaire Thorique et Physique Mathmatique, C.P. 229, Universit Libre de Bruxelles (ULB), B 1050 Brussels (Belgium); Baye, D., E-mail: dbaye@ulb.ac.be [Physique Nuclaire Thorique et Physique Mathmatique, C.P. 229, Universit Libre de Bruxelles (ULB), B 1050 Brussels (Belgium); Physique Quantique, C.P. 165/82, Universit Libre de Bruxelles (ULB), B 1050 Brussels (Belgium); Suzuki, Y., E-mail: suzuki@nt.sc.niigata-u.ac.jp [Department of Physics, Niigata University, Niigata 950-2181 (Japan); RIKEN Nishina Center, Wako 351-0198 (Japan); Aoyama, S., E-mail: aoyama@cc.niigata-u.ac.jp [Center for Academic Information Service, Niigata University, Niigata 950-2181 (Japan); Arai, K., E-mail: arai@nagaoka-ct.ac.jp [Division of General Education, Nagaoka National College of Technology, 888 Nishikatakai, Nagaoka, Niigata 940-8532 (Japan)

    2014-04-15T23:59:59.000Z

    We present applications of microscopic models to nuclear reactions of astrophysical interest, and we essentially focus on few-body systems. The calculation of radiative-capture and transfer cross sections is outlined, and we discuss the corresponding reaction rates. Microscopic theories are briefly presented, and we emphasize on the matrix elements of four-body systems. The microscopic extension of the R-matrix theory to nuclear reactions is described. Applications to the {sup 2}H(d, ?){sup 4}He, {sup 2}H(d, p){sup 3}H and {sup 2}H(d, n){sup 3}He reactions are presented. We show the importance of the tensor force to reproduce the low-energy behaviour of the cross sections.

  11. Entanglement from thermal black body radiation

    E-Print Network [OSTI]

    Daniel Braun

    2005-09-06T23:59:59.000Z

    Two non--interacting quantum systems which couple to a common environment with many degrees of freedom initially in thermal equilibrium can become entangled due to the indirect interaction mediated through this heat bath. I examine here the dynamics of reservoir induced entanglement for a heat bath consisting of a thermal electro--magnetic radiation field, such as black body radiation or the cosmic microwave background, and show how the effect can be understood as result of an effective induced interaction.

  12. Mind-Body Interpretation of Quantum Mechanics

    E-Print Network [OSTI]

    Raoul Nakhmanson

    2001-11-13T23:59:59.000Z

    The wave-particle duality is a mind-body one. In the real 3D-space there exists only the particle, the wave exists in its consciousness. If there are many particles, their distribution in accordance with the wave function represents a real wave in real space. Many worlds, Schroedinger cat, etc., exist only as mental constructions. The "waves of matter" are non-material. Feynman et al. taught quantum world "is like neither". Alas, they forgot living matter.

  13. Optical pumping into many-body entanglement

    E-Print Network [OSTI]

    Jaeyoon Cho; Sougato Bose; M. S. Kim

    2011-01-16T23:59:59.000Z

    We propose a scheme of optical pumping by which a system of atoms coupled to harmonic oscillators is driven to an entangled steady state through the atomic spontaneous emission. It is shown that the optical pumping can be tailored so that the many-body atomic state asymptotically reaches an arbitrary stabilizer state regardless of the initial state. The proposed scheme can be suited to various physical systems. In particular, the ion-trap realization is well within current technology.

  14. Commercial Aircraft Corporation of China (Comac) attempts to break the Airbus-Boeing duopoly, will it succeed? : an industry analysis framework applied

    E-Print Network [OSTI]

    Fuentes, Jose L., S.M. Massachusetts Institute of Technology

    2011-01-01T23:59:59.000Z

    Using an industry analysis framework, this thesis analyzes whether the recently established Commercial Aircraft Corporation of China (Comac) is likely to break the Boeing-Airbus duopoly in the industry of large commercial ...

  15. Design and control of a semi-passive, heavy-duty paired mobile robot system with application to aircraft wing assembly

    E-Print Network [OSTI]

    Menon, Manas Chandran

    2010-01-01T23:59:59.000Z

    We describe the development of a robotic system capable of performing a class of manufacturing operations. An example of such an operation is commonly found in aircraft assembly - this demonstrates the immediate applicability ...

  16. Civil aircraft accident Report on the Accident to Boeing 707-465 G-Arwe at Heathrow Airport, London on 8th April 1968

    E-Print Network [OSTI]

    Anonymous

    1969-01-01T23:59:59.000Z

    A3.C.A.P. 324 Civil aircraft accident Report on the Accident to Boeing 707-465 G-Arwe at Heathrow Airport, London on 8th April 1968...

  17. Report of the Court investigation of accident on the Tudor IV. Aircraft Star Tiger G-AHNP on the 30th January, 1948, held under Air Navigation

    E-Print Network [OSTI]

    Anonymous

    MINISTRY OF CIVIL AVIATION REPORT of the Court investigation of the accident to the Tudor IV. Aircraft "Star Tiger" G-AHNP on the 30th January, 1948, held under the Air Navigation (Investigation of Accidents) Regulations, 1922

  18. FINDING THE MIND IN THE BODY Joshua Knobe

    E-Print Network [OSTI]

    Knobe, Joshua

    FINDING THE MIND IN THE BODY Joshua Knobe [Knobe, J. (2011). Finding the mind in the body. In Brockman, M. (ed.) Future Science: Essays from that seems especially noticeable. Some of these things have minds, while others do

  19. Determining sand-body geometries for waterflood reservoirs: Examples from Oklahoma

    SciTech Connect (OSTI)

    Kreisa, R.D.; Pinero, E. (Mobil Research and Development Corp., Dallas, TX (USA))

    1987-02-01T23:59:59.000Z

    Waterflood projects require an accurate knowledge of reservoir geometry and well-to-well continuity. However, sandstones with thin, multiple-pay zones can be extremely difficult to correlate with confidence. Two case studies of Pennsylvanian sandstones in Oklahoma illustrate how a model for the depositional history of such reservoirs can be an effective tool for determining reservoir continuity. In contrast, correlation criteria such as similar wireline log signatures and relative sand-body thicknesses are not reliable in many situations. In Southwest Logan field (Beaver County), 5 to 15-ft thick reservoir sands formed as shallow marine sand ridges. Their dimensions were approximated from height-to-width ratios of modern sand ridges. Then the reservoir sands were mapped using wireline logs and core data. Individual reservoir sands were approximately 1-2 km wide and stacked en echelon vertically. Thus, a line-drive waterflood pattern oriented parallel to the axes of the ridges is recommended. Tatums field (Carter County) consists of 5 to 50-ft thick sandstones deposited in various deltaic environments. Distributary channel sands have good continuity downdip, but are narrow and lenticular across depositional strike. Crevasse splay and other bay-fill sands were deposited marginal to the channels and are extremely discontinuous. This depositional model can be used to improve flood patterns for these sands, leading to improved sweep efficiency. In both examples, for effective mapping, the depositional facies models have been used to register reservoir quality and wireline log signatures.

  20. Design and implementation of a Synthetic Aperture Radar for Open Skies (SAROS) aboard a C-135 aircraft

    SciTech Connect (OSTI)

    Cooper, D.W.; Murphy, M. [Sandia National Labs., Albuquerque, NM (United States); Rimmel, G. [Loral Defense Systems, Litchfield, AZ (United States)

    1994-08-01T23:59:59.000Z

    NATO and former Warsaw Pact nations have agreed to allow overflights of their countries in the interest of easing world tension. The United States has decided to implement two C-135 aircraft with a Synthetic Aperture Radar (SAR) that has a 3-meter resolution. This work is being sponsored by the Defense Nuclear Agency (DNA) and will be operational in Fall 1995. Since the SAR equipment must be exportable to foreign nations, a 20-year-old UPD-8 analog SAR system was selected as the front-end and refurbished for this application by Loral Defense Systems. Data processing is being upgraded to a currently exportable digital design by Sandia National Laboratories. Amplitude and phase histories will be collected during these overflights and digitized on VHS cassettes. Ground stations will use reduction algorithms to process the data and convert it to magnitude-detected images for member nations. System Planning Corporation is presently developing a portable ground station for use on the demonstration flights. Aircraft integration into the C-135 aircraft is being done by the Air Force at Wright-Patterson AFB, Ohio.

  1. 136Sn and three body forces

    E-Print Network [OSTI]

    M. Saha Sarkar; S. Sarkar

    2014-11-10T23:59:59.000Z

    New experimental data on 2+ energies of 136,138Sn confirms the trend of lower 2+ excitation energies of even-even tin isotopes with N > 82 compared to those with N 4+)) of these nuclei, simultaneously, apart from one whose matrix elements have been changed empirically to produce mixed seniority states by weakening pairing. We have shown that the experimental result also shows good agreement with the theory in which three body forces have been included in a realistic interaction. The new theoretical results on transition probabilities have been discussed to identify the experimental quantities which will clearly distinguish between different views.

  2. Body Mass Index - HPMC Occupational Health Services

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced Materials Find FindRewind Generator| Princeton PlasmaBody Mass

  3. Towards Certification of Autonomous Unmanned Aircraft Using Formal Model Checking and Simulation

    E-Print Network [OSTI]

    Fisher, Michael

    DesireIntention CAA Civil Aviation Authority COTS Commercial Off-The-Shelf FAA Federal Aviation Administration Hz pertinent to its intended use is presented to a regulatory body (such as the Federal Aviation Administration (FAA) in the USA or the Civil Aviation Authority (CAA) in the UK). Once the regulator is satisfied

  4. Size distribution and chemical composition of aerosol particles in the free troposphere over Japan: Aircraft measurements

    SciTech Connect (OSTI)

    Iwasaka, Y.; Mori, I.; Mastunga, K. [Nagoya Univ. (Japan)

    1996-12-31T23:59:59.000Z

    Aircraft measurements of number-, mass- and volume-size distributions of aerosols and concentration of sulfate, nitrate and others contained in particulate matter were made in the free troposphere over Japan in 1991-1994. Number-size distribution frequently shows a peak in the area of a diameter of D {ge} 1 {mu}m in the free troposphere during observational periods. A few peaks are identified in the volume-size distribution as estimated on the basis of number-size distribution having single mode in a coarse range. Mass-size distribution frequently indicate enhancement in the coarse size range. This feature of the distribution is more frequent in those measurements made at 4.42 km than those at 2.29 km. On the basis of a backward trajectory analysis of the air mass containing those particles, soil particles originating from the Asian continent affect the features found in the size distributions as well as and vertical change in those size distributions. Particulate sulfate concentration in the free troposphere suggested that chemical transformation of particles with D {ge} 1 {mu}m advanced during long range transport of the particle possibly through coagulation of sulfate particles on coarse size particles such as Asian dust particles, adsorption of gaseous sulfate. Those measurements provide useful data et to discuss global geochemical cycle and radiative forcing of particles originated from the Asian continent.

  5. Effective one-body approach to the relativistic two-body problem

    E-Print Network [OSTI]

    P. P. Fiziev; I. T. Todorov

    2001-01-20T23:59:59.000Z

    The relativistic 2-body problem, much like the non-relativistic one, is reduced to describing the motion of an effective particle in an external field. The concept of a relativistic reduced mass and effective particle energy introduced some 30 years ago to compute relativistic corrections to the Balmer formula in quantum electrodynamics, is shown to work equally well for classical electromagnetic and gravitational interaction. The results for the gravitational 2-body problem have more than academic interest since they apply to the study of binary pulsars that provide precision tests for general relativity. They are compared with recent results derived by other methods.

  6. A STUDY OF EXTRACTIVE AND REMOTE-SENSING SAMPLING AND MEASUREMENT OF EMISSIONS FROM MILITARY AIRCRAFT ENGINES

    SciTech Connect (OSTI)

    Cheng, Mengdawn [ORNL; Corporan, E. [Air Force Research Laboratory, Wright-Patterson AFB, OH

    2010-01-01T23:59:59.000Z

    Aircraft emissions contribute to the increased atmospheric burden of particulate matter (e.g., black carbon and secondary organic compounds) that plays a role in air quality, contrail formation and climate change. Sampling and measurement of modern aircraft emissions at the engine exhaust plane (EEP) for to engine and fuel certification remains a daunting task, no agency-certified method is available for the task. In this paper we summarize the results of a recent study that was devoted to investigate both extractive and optical remote-sensing (ORS) technologies in sampling and measurement of gaseous and particulate matter (PM) emitted by a number of military aircraft engines operated with JP-8 and a Fischer-Tropsch (FT) fuel at various engine conditions. These engines include cargo, bomber, and helicopter types of military aircraft that consumes 70-80% of the military aviation fuel each year. The emission indices of selected pollutants are discussed as these data may be of interest for atmospheric modeling and for design of air quality control strategies around the airports and military bases. It was found that non-volatile particles in the engine emissions were all in the ultrafine range. The mean diameter of particles increased as the engine power increased; the mode diameters were in the 20nm range for the low power condition of a new helicopter engine to 80nm for the high power condition of a newly maintained bomber engine. Elemental analysis indicated little metals were present on particles in the exhaust, while most of the materials on the exhaust particles were based on carbon and sulfate. Carbon monoxide, carbon dioxide, nitrogen oxide, sulfur dioxide, formaldehyde, ethylene, acetylene, propylene, and alkanes were detected using both technologies. The last five species (in the air toxics category) were most noticeable only under the low engine power. The emission indices calculated based on the ORS data were however observed to differ significantly (up to 90%) from (typically lower than) those based on the extractive techniques. However, the ORS techniques were useful in providing non-intrusive real-time measurements of gaseous species in the exhaust plume, which warrants further development. The results obtained in this program validate sampling methodology and measurement techniques used for non-volatile PM aircraft emissions as described in the SAE AIR-6037.

  7. The Few-Body Coulombian Problem

    E-Print Network [OSTI]

    E. O. Alt

    1998-09-15T23:59:59.000Z

    Recent advances in the treatment of scattering of charged composite particles are reviewed. In a first part I report on developments of the theory. Specifically I describe the recent completion of the derivation of the co-ordinate space asymptotic behaviour of the wave function for three charged particles in the continuum. This knowledge is increasingly being made use of in attempts to `derive' three-Coulomb particle wave functions to be used in all of configuration space which are solutions of the Schroedinger equation, though not everywhere but at least in one or preferably all of the asymptotic regions. Their practical application in approximate calculations of ionisation and breakup processes is pointed out. The asymptotic three-charged particle wave functions find further use in investigations of asymptotic and analytic properties of matrix elements of the three-body Coulomb resolvent. An important example is the nonperturbative derivation, valid for all energies, of the large-distance behaviour of the optical potential. In the second part I describe renewed attempts to establish the few-body approach as a valuable tool for calculating (energetic) atomic collision processes. At the end I briefly touch upon the recent successful above-breakup-threshold calculation of proton-deuteron elastic scattering for a realistic potential.

  8. Body monitoring and imaging apparatus and method

    DOE Patents [OSTI]

    McEwan, T.E.

    1998-06-16T23:59:59.000Z

    A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two flat copper foils, thus permitting the antenna to be housed in a substantially flat housing. The monitor converts the detected voltage to an audible signal with both amplitude modulation and Doppler effect. It further uses a dual time constant to reduce the effect of gross sensor-to-surface movement. The monitor detects the movement of one or more internal body parts, such as the heart, lungs, arteries, and vocal chords, and includes a pulse generator for simultaneously inputting a sequence of pulses to a transmit path and a grating path. The pulses transmitted along the transmit path drive Oh impulse, generator and provide corresponding transmit pulses that are applied to a transmit antenna. The gating path includes a range delay generator which generates timed gating pulses. The timed gating pulses cause the receive path to selectively conduct pulses reflected from the body parts and received by a receive antenna. The monitor output potential can be separated into a cardiac output indicative of the physical movement of the heart, and a pulmonary output indicative of the physical movement of the lung. The impulse generator in the transmit path can be replaced with a pulsed RF generator. 13 figs.

  9. Body monitoring and imaging apparatus and method

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01T23:59:59.000Z

    A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two flat copper foils, thus permitting the antenna to be housed in a substantially flat housing. The monitor converts the detected voltage to an audible signal with both amplitude modulation and Doppler effect. It further uses a dual time constant to reduce the effect of gross sensor-to-surface movement. The monitor detects the movement of one or more internal body parts, such as the heart, lungs, arteries, and vocal chords, and includes a pulse generator for simultaneously inputting a sequence of pulses to a transmit path and a gating path. The pulses transmitted along the transmit path drive an impulse generator and provide corresponding transmit pulses that are applied to a transmit antenna. The gating path includes a range delay generator which generates timed gating pulses. The timed gating pulses cause the receive path to selectively conduct pulses reflected from the body parts and received by a receive antenna. The monitor output potential can be separated into a cardiac output indicative of the physical movement of the heart, and a pulmonary output indicative of the physical movement of the lung.

  10. Body monitoring and imaging apparatus and method

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1998-01-01T23:59:59.000Z

    A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two flat copper foils, thus permitting the antenna to be housed in a substantially flat housing. The monitor converts the detected voltage to an audible signal with both amplitude modulation and Doppler effect. It further uses a dual time constant to reduce the effect of gross sensor-to-surface movement. The monitor detects the movement of one or more internal body parts, such as the heart, lungs, arteries, and vocal chords, and includes a pulse generator for simultaneously inputting a sequence of pulses to a transmit path and a grating path. The pulses transmitted along the transmit path drive Oh impulse, generator and provide corresponding transmit pulses that are applied to a transmit antenna. The gating path includes a range delay generator which generates timed gating pulses. The timed gating pulses cause the receive path to selectively conduct pulses reflected from the body parts and received by a receive antenna. The monitor output potential can be separated into a cardiac output indicative of the physical movement of the heart, and a pulmonary output indicative of the physical movement of the lung. The impulse generator in the transmit path can be replaced with a pulsed RF generator.

  11. Body monitoring and imaging apparatus and method

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-11-12T23:59:59.000Z

    A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two flat copper foils, thus permitting the antenna to be housed in a substantially flat housing. The monitor converts the detected voltage to an audible signal with both amplitude modulation and Doppler effect. It further uses a dual time constant to reduce the effect of gross sensor-to-surface movement. The monitor detects the movement of one or more internal body parts, such as the heart, lungs, arteries, and vocal chords, and includes a pulse generator for simultaneously inputting a sequence of pulses to a transmit path and a gating path. The pulses transmitted along the transmit path drive an impulse generator and provide corresponding transmit pulses that are applied to a transmit antenna. The gating path includes a range delay generator which generates timed gating pulses. The timed gating pulses cause the receive path to selectively conduct pulses reflected from the body parts and received by a receive antenna. The monitor output potential can be separated into a cardiac output indicative of the physical movement of the heart, and a pulmonary output indicative of the physical movement of the lung. 12 figs.

  12. Tamper-indicating device having a glass body

    DOE Patents [OSTI]

    Johnston, Roger G. (Los Alamos, NM); Garcia, Anthony R. E. (Espanola, NM)

    2003-04-29T23:59:59.000Z

    A tamper-indicating device is described. The device has a first glass body member and a second glass body member that are attached to each other through a hasp. The glass body members of the device can be tempered. The body members can be configured with hollow volumes into which powders, microparticles, liquids, gels, or combinations thereof are sealed. The choice, the amount, and the location of these materials can produce a visible, band pattern to provide each body member with a unique fingerprint identifier, which makes it extremely difficult to repair or replace once it is damaged in order to avoid tamper detection.

  13. Does the charge of a body reduce its gravitational field?

    E-Print Network [OSTI]

    V. Hushwater

    2010-06-02T23:59:59.000Z

    One can get the impression from the Reissner-Nordstrom solution of Einstein's equations that the charge of a body reduces its gravitational field. This looks surprising since the energy of the electrostatic field surrounding a charged body, must contribute positively, as an additional, "electromagnetic mass", to the gravitational field produced by the body. We resolve this puzzle by showing that the mass M in the Reissner-Nordstrom solution is not the "bare mass" of the body, but its "renormalized mass". I. e. M, in addition to the bare mass, includes the total electromagnetic mass of the body. But at finite distances from the body only a part of the electromagnetic mass contributes to the gravitational field. That is why the gravity of a charged body is determined by the quantity smaller than M.

  14. Analysis of Body Sensor Network Using Human Body as the Channel

    E-Print Network [OSTI]

    Yoo, Hoi-Jun

    Organization]: Computer-communication Networks General General Terms Measurement, Design, Experimentation body as a communication medium [2], [7][13]. Since BCC operates as near-field coupling applications, energy efficiency is the key issue due to the battery limitations of the wearable

  15. [Semantic equivalence of the Brazilian Portuguese version of the "Body Change Inventory"].

    E-Print Network [OSTI]

    Conti, MA; Ferreira, ME; Amaral, AC; Hearst, N; Cords, TA; Scagliusi, FB

    2012-01-01T23:59:59.000Z

    portugus do Body Change Inventory Semantic Equivalence ofof the Body Change Inventory Maria Elisa Caputo Ferreira 1tion of the Body Change Inventory: An assessment instrument

  16. Heat engine driven by three-body photon tunneling

    E-Print Network [OSTI]

    Latella, Ivan; Rubi, J Miguel; Biehs, Svend-Age; Ben-Abdallah, Philippe

    2015-01-01T23:59:59.000Z

    Near-field heat engines are devices that convert the evanescent thermal field supported by a primary source into usable mechanical energy. By analyzing the thermodynamic performance of three-body near-field heat engines, we demonstrate that the power they supply can be substantially larger than that of two-body systems, showing so their strong potential for energy harvesting. Theoretical limits for energy and entropy fluxes in three-body systems are discussed and compared with their corresponding two-body counterparts. Such considerations confirm that the thermodynamic availability in energy-conversion processes driven by three-body photon tunneling can exceed the thermodynamic availability in two-body systems.

  17. Investigating the influence of media on male body image: in search of a potential moderator

    E-Print Network [OSTI]

    Mignogna, Joseph

    2013-02-22T23:59:59.000Z

    of all three of the body image assessment measures (Body Image Assessment, BIA; Body Morph Assessment, BMA; and Somatomorphic Matrix, SM) in measuring various aspects of male body image. The BIA and BMA were mainly sensitive to measuring "thinness...

  18. Metal spring stub and ceramic body electrode assembly

    DOE Patents [OSTI]

    Rolf, R.L.; Sharp, M.L.

    1984-06-26T23:59:59.000Z

    An electrode assembly is disclosed comprising an electrically conductive ceramic electrode body having an opening therein and a metal stub retained in the opening with at least a surface of the stub in intimate contact with a surface of the body and the stub adapted with a spring to flex and prevent damage to the body from expansion of the stub when subjected to a temperature differential. 1 fig.

  19. An investigation of the effect of rudder deflection on aircraft motions and tail loads during rolling maneuvers

    E-Print Network [OSTI]

    Sell, John Richard

    1959-01-01T23:59:59.000Z

    , the product of inertia tense I and Q became zero and are dropped from the equations. The equations of motion, referred to the Eulerian axes are now written: 7' F?=, rnI, g ~Q 4/-RVj z F& = mI v 'RU -P4'j r. F, =~[g PV-QU] 73 $ L PI~ -RI~s ~QR... simplifications of the equations of motion of an aircraft were possible. These simplifications are retain- ed in the developments in References 1, 2, and 3, These simplifications are based upon the assumption that the products and squares of disturbance...

  20. A flight test system for the determination of the stability and control derivatives of a general aviation aircraft

    E-Print Network [OSTI]

    Oehl, David Christopher

    1995-01-01T23:59:59.000Z

    Amps A Perturbation from trim condition 5 a Aileron deflection D A Q Data Acquisition 5 e Elevator deflection 5 r Rudder deflection 5T Thrust setting F A A Federal Aviation Administration FTE Flight Test Engineer g, G Acceleration due...A FLIGHT TEST SYSTEM FOR THE DETERMINATION OF THE STABILITY AND CONTROL DERIVATIVES OF A GENERAL AVIATION AIRCRAFT A Thesis by D A V I D CHRISTOPHER OEHL Submitted to the Office of Graduate Studies of Texas A & M University in partial...