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Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Hybrid wing-body aircraft noise and performance assessment  

E-Print Network (OSTI)

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 ...

Weed, Philip Andrew

2010-01-01T23:59:59.000Z

2

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

E-Print Network (OSTI)

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 ...

Mody, Pritesh (Pritesh Chetan)

2010-01-01T23:59:59.000Z

3

Aircraft  

DOE Green Energy (OSTI)

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.

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

4

Aircraft  

DOE Patents (OSTI)

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.

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

5

Aircraft  

DOE Patents (OSTI)

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.

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

1998-09-22T23:59:59.000Z

6

Solar thermal aircraft  

DOE Patents (OSTI)

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.

Bennett, Charles L. (Livermore, CA)

2007-09-18T23:59:59.000Z

7

Aircraft Inspection  

Science Conference Proceedings (OSTI)

Table 3   Typical locations of corrosion on aircraft...by maintenance, moisture intrusion V RBR. BAS Nose section Nose radome latches Galvanic (steel fasteners in aluminum structures)

8

Variations Associated with Cores and Gaps of a Pacific Narrow Cold Frontal Rainband  

Science Conference Proceedings (OSTI)

A NOAA P-3 instrumented aircraft observed an intense, fast-moving narrow cold frontal rainband (NCFR) as it approached the California coast on 19 February 2001 during the Pacific Coastal Jets Experiment. Airborne Doppler radar data obtained while ...

David P. Jorgensen; Zhaoxia Pu; P. Ola G. Persson; Wei-Kuo Tao

2003-11-01T23:59:59.000Z

9

ARM - Other Aircraft Campaigns  

NLE Websites -- All DOE Office Websites (Extended Search)

FacilityOther Aircraft Campaigns FacilityOther Aircraft Campaigns AAF Information Proposal Process Science (PDF) Baseline Instruments Campaign Instruments Instrumentation Workshop 2008 AAF Fact Sheet G-1 Fact Sheet Images Field Campaigns AAF Campaigns 2007 - UAV Campaigns 1993 - 2006, 2015 Other Aircraft Campaigns 1993 - 2010 AAF Contacts Rickey Petty DOE AAF Program Director Beat Schmid Technical Director Other Aircraft Campaigns In addition to AAF and UAV field campaigns, the ARM Climate Research Facility has hosted the following campaigns that included aircraft. Start Date Status Campaign Name Duration Lead Scientist Site 2010-05-01 Approved Deep Convective Clouds and Chemistry 2 months Christopher Cantrell SGP 2006-01-01 Past RAdiative Divergence using AMF, GERB and AMMA STations (RADAGAST) 1.0 years Anthony Slingo AMF

10

Tropospheric sampling with aircraft  

SciTech Connect

Aircraft constitute a unique environment which places stringent requirements on the instruments used to measure the concentrations of atmospheric trace gases and aerosols. Some of these requirements such as minimization of size, weight, and power consumption are general; others are specific to individual techniques. This review presents the basic principles and considerations governing the deployment of trace gas and aerosol instrumentation on an aircraft. An overview of common instruments illustrates these points and provides guidelines for designing and using instruments on aircraft-based measurement programs.

Daum, P.H.; Springston, S.R.

1991-03-01T23:59:59.000Z

11

Remotely Sensed Measurements of Stratocumulus Properties during FIRE Using the C130 Aircraft Multi-channel Radiometer  

Science Conference Proceedings (OSTI)

This paper gives a description of a narrow-hand near-infrared radiometer that was operated during the marine stratocumulus intensive field observation program of FIRE in 1987 from the United Kingdom Meteorological Office C130 aircraft. All data ...

F. Rawlins; J. S. Foot

1990-11-01T23:59:59.000Z

12

Rankline-Brayton engine powered solar thermal aircraft  

Science Conference Proceedings (OSTI)

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.

Bennett, Charles L. (Livermore, CA)

2012-03-13T23:59:59.000Z

13

Rankine-Brayton engine powered solar thermal aircraft  

SciTech Connect

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.

Bennett, Charles L. (Livermore, CA)

2009-12-29T23:59:59.000Z

14

Identification of Aircraft Hazards  

Science Conference Proceedings (OSTI)

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).

K. Ashley

2006-12-08T23:59:59.000Z

15

General Aviation Aircraft Reliability Study  

Science Conference Proceedings (OSTI)

This reliability study estimates Complex General Aviation (GA) Aircraft System reliability. As part of an effort to successfully improve the safety and reliability of the next generation of GA aircraft, a benchmarking of the current reliability of GA ...

Pettit Duane; Turnbull Andrew

2001-02-01T23:59:59.000Z

16

ARM - Field Campaign - Aircraft Carbon  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsAircraft Carbon govCampaignsAircraft Carbon Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Aircraft Carbon 2006.07.01 - 2008.09.30 Lead Scientist : Margaret Torn For data sets, see below. Description Airborne trace-gas measurements at ARM-SGP provided valuable data for addressing carbon-cycle questions highlighted by the US Climate Change Research Program and the North American Carbon Program. A set of carbon-cycle instruments and sample collection systems were added to an ARM-managed aircraft at ARM-SGP user facility. A separate (in-place) grant covered the cost of developing the instrument systems, analyzing the data, and ingesting all data to the ARM data archives. In the short-term (~1 y) we had two priorities. The first was to acquire

17

Aircraft Cabin Environmental Quality Sensors  

NLE Websites -- All DOE Office Websites (Extended Search)

Aircraft Cabin Environmental Quality Sensors Aircraft Cabin Environmental Quality Sensors Title Aircraft Cabin Environmental Quality Sensors Publication Type Report Year of Publication 2004 Authors Gundel, Lara A., Thomas W. Kirchstetter, Michael Spears, and Douglas P. Sullivan Keywords carbon monoxide, ozone Abstract Identification of aircraft cabin environmental quality concerns for which sensors may be useful The highest priority environmental indicators identified are ozone and cabin air pressure, followed by carbon monoxide and carbon dioxide with moderate priority, and then relative humidity, airborne particles, and organic contaminants, including engine oil byproducts and pesticides. This list is based on the Congressional requirements and recent scientific literature, starting with information from recent studies (NAS/NRC, ASHRAE/Battelle), and continuing by seeking input from a variety of stakeholders.

18

Optimal scheduling of fighter aircraft maintenance  

E-Print Network (OSTI)

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 ...

Cho, Philip Y

2011-01-01T23:59:59.000Z

19

Systematic Differences in Aircraft and Radiosonde Temperatures  

Science Conference Proceedings (OSTI)

Automated aircraft data are very important as input to numerical weather prediction (NWP) models because of their accuracy, large quantity, and extensive and different data coverage compared to radiosonde data. On average, aircraft mean ...

Bradley A. Ballish; V. Krishna Kumar

2008-11-01T23:59:59.000Z

20

Maintenance cost studies of present aircraft subsystems  

E-Print Network (OSTI)

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 ...

Pearlman, Chaim Herman Shalom

1966-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Global Mortality Attributable to Aircraft Cruise Emissions  

E-Print Network (OSTI)

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 ...

Britter, Rex E.

22

Flux Sampling Errors for Aircraft and Towers  

Science Conference Proceedings (OSTI)

Various errors and influences leading to differences between tower- and aircraft-measured fluxes are surveyed. This survey is motivated by reports in the literature that aircraft fluxes are sometimes smaller than tower-measured fluxes. Both tower ...

L. Mahrt

1998-04-01T23:59:59.000Z

23

A Comparison of Turbulence Measurements from Aircraft  

Science Conference Proceedings (OSTI)

A performance analysis of the three turbulence-measuring aircraft which participated in the GATE is presented. These aircraft were a Lockheed C-130 operated by the Meteorological Research Flight Centre of the U.K. Meteorological Office, a Douglas ...

Margaret A. Lemone; William T. Pennell

1980-12-01T23:59:59.000Z

24

Propulsion system concepts for silent aircraft  

E-Print Network (OSTI)

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 ...

Manneville, Alexis, 1978-

2004-01-01T23:59:59.000Z

25

Method and apparatus for monitoring aircraft components  

DOE Patents (OSTI)

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.

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

1996-01-16T23:59:59.000Z

26

Method and apparatus for monitoring aircraft components  

DOE Patents (OSTI)

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.

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

1996-01-01T23:59:59.000Z

27

AIAA 20033698 Aircraft Gas Turbine Engine  

E-Print Network (OSTI)

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

Stanford University

28

Why Is the Deep Sinking Narrow?  

Science Conference Proceedings (OSTI)

Narrowness of downwelling and broadness of upwelling are ubiquitous features of numerical and laboratory simulations of oceanic thermal overturning and are evidenced by the global ocean distributions of tracers, heat, and salt. By varying the ...

Michael Winton

1995-05-01T23:59:59.000Z

29

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

E-Print Network (OSTI)

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 ...

Yutko, Brian M. (Brian Matthew)

2011-01-01T23:59:59.000Z

30

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

E-Print Network (OSTI)

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 ...

Yutko, Brian

2011-06-27T23:59:59.000Z

31

Characterization of Aircraft Icing Environments with Supercooled Large Drops for Application to Commercial Aircraft Certification  

Science Conference Proceedings (OSTI)

Observations of aircraft icing environments that included supercooled large drops (SLD) greater than 100 ?m in diameter have been analyzed. The observations were collected by instrumented research aircraft from 134 flights during six field ...

Stewart G. Cober; George A. Isaac

2012-02-01T23:59:59.000Z

32

Aircraft S-HIS Observations during MPACE  

NLE Websites -- All DOE Office Websites (Extended Search)

Aircraft S-HIS Observations during MPACE DeSlover, Daniel University of Wisconsin Holz, Robert University of Wisconsin, CIMMS Turner, David University of Wisconsin-Madison...

33

IMPACT OF HALON REPLACEMENT ON AIRCRAFT ENGINE ...  

Science Conference Proceedings (OSTI)

... If the extinguisher unit is installed in a location that adversely affects the aircraft's center of gravity (CG), ballast may have to be added elsewhere. ...

2011-11-03T23:59:59.000Z

34

An Air-Driven Pressure Booster Pump for Aircraft-Based Air Sampling  

Science Conference Proceedings (OSTI)

A diaphragm pump used to boost the intake pressure of a three-stage high-pressure air compressor for collecting large air samples during aircraft flights has been developed. The pump consists of a large (17 L) spherical body divided into two ...

C. A. M. Brenninkmeijep; P. A. Roberts

1994-12-01T23:59:59.000Z

35

Modelling and stability analysis of aircraft power systems.  

E-Print Network (OSTI)

??The more-electric aircraft concept is a major trend in aircraft electrical power system engineering and results in an increase in electrical loads based on power (more)

Areerak, Kongpan

2009-01-01T23:59:59.000Z

36

Calibration of the Ogawa ozone passive sampler for aircraft cabins...  

NLE Websites -- All DOE Office Websites (Extended Search)

Calibration of the Ogawa ozone passive sampler for aircraft cabins. Title Calibration of the Ogawa ozone passive sampler for aircraft cabins. Publication Type Journal Article Year...

37

Using Heuristics to Solve the Dedicated Aircraft Recovery Problem ...  

E-Print Network (OSTI)

Nov 12, 2001 ... Changes can be delaying flights, cancelling flights, swapping aircraft (either within the same fleet or between fleets) or use of standby aircraft.

38

Statistical estimation of multiple faults in aircraft gas turbine engines  

E-Print Network (OSTI)

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

Ray, Asok

39

Lagrangian Detection of Windshear for Landing Aircraft  

Science Conference Proceedings (OSTI)

Recent studies have shown that aerial disturbances affecting landing aircraft have a coherent signature in the Lagrangian aerial particle dynamics inferred from ground-based lidar scans. Specifically, attracting Lagrangian Coherent Structures (...

Hossein Amini Kafiabad; Pak Wai Chan; George Haller

40

PNNL: Research Aircraft Facility (RAF) - FCSD  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Aircraft Facility (RAF) Research Aircraft Facility (RAF) It is in the mixed layer and free troposphere that most chemical reactions, gas-to-particle transformations, cloud processes, and transport of materials occur. The Pacific Northwest National Laboratory operates the U.S. Department of Energy (DOE) Research Aircraft Facility (RAF) performing airborne research in these areas to serve atmospheric scientists at DOE and other federal, state, and industrial entities. The RAF is dedicated to fulfilling important DOE and national goals in understanding atmospheric processes as they relate to the DOE's environmental missions and the global environment. Central to this facility are the PNNL Grumman Gulfstream 159 (G-1) aircraft, its flight crew, science and engineering technical staff,

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Automated Meteorological Reports from Commercial Aircraft  

Science Conference Proceedings (OSTI)

Commercial aircraft now provide over 130,000 meteorological observations per day, including temperature,winds, and in some cases, humidity, vertical wind gust, or eddy dissipation rate (turbulence). The temperature and wind data are used in most ...

William R. Moninger; Richard D. Mamrosh; Patricia M. Pauley

2003-02-01T23:59:59.000Z

42

Particle Impact and Breakup in Aircraft Measurement  

Science Conference Proceedings (OSTI)

Measurements of cloud particle properties from aircraft by optical and impact techniques are subject to artifacts following particle breakup prior to detection. The impact kinetic energy to surface energy ratio (L) provides a breakup criterion at ...

German Vidaurre; John Hallett

2009-05-01T23:59:59.000Z

43

Improved Wind Measurements on Research Aircraft  

Science Conference Proceedings (OSTI)

Improved techniques for measuring horizontal and vertical wind components and state variables on research aircraft are presented. They include a filtering method for correcting ground speed and position Inertial Navigation System data with Global ...

D. Khelif; S. P. Burns; C. A. Friehe

1999-07-01T23:59:59.000Z

44

Aircraft Icing Caused by Large Supercooled Droplets  

Science Conference Proceedings (OSTI)

The characteristic of aircraft icing environments containing large supercooled droplets are described. Substantial loss in rate of climb capability can result from less than 10 minutes duration in conditions where fewer than 0.11 cm?3 of ...

Marcia K. Politovich

1989-09-01T23:59:59.000Z

45

Aircraft Icing Conditions in Northeast Colorado  

Science Conference Proceedings (OSTI)

The in-flight icing environment in northeastern Colorado is described through remote and in situ measurements. Four field efforts in the winters of 1990 through 1994 were conducted in the area, and comprehensive datasets from research aircraft, ...

Marcia K. Politovich; Tiffany A. O. Bernstein

2002-02-01T23:59:59.000Z

46

Reorientation of Hydrometeors in Aircraft Accelerated Flow  

Science Conference Proceedings (OSTI)

The drag force, instantaneous canting angle and response characteristics are discussed for large hydrometeors in horizontally accelerated airflow. Comparisons of calculated canting angles are made with data from an aircraft precipitation ...

K. V. Beard

1983-11-01T23:59:59.000Z

47

Scaling considerations for small aircraft engines  

E-Print Network (OSTI)

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 ...

Chan, Nicholas Y. S

2008-01-01T23:59:59.000Z

48

Aircraft trajectory simulator using a three degrees of freedom aircraft point mass model  

Science Conference Proceedings (OSTI)

Aircraft Operators Companies (AOCs) are always willing to keep the cost of a flight as low as possible. These costs could be modelled using a function of the fuel consumption, time of flight and fixed cost (over flight cost, maintenance, etc.). These ... Keywords: aircraft model validation, business trajectory, optimal control, point mass model, trajectory based operation, trajectory optimization

Javier Garca-Heras Carretero, Francisco Javier Sez Nieto, Ricardo Romn Cordn

2013-05-01T23:59:59.000Z

49

Intelligent agent for aircraft collision avoidance  

E-Print Network (OSTI)

The trend of the air traffic system is toward a free flight environment. Free flight offers greater flexibility in planning for flights than the current air traffic control and management system. In free flight, operators are allowed to fly under instrument flight rules and choose their own flight path and speed in real time. One of the requirements to make the free flight environment feasible is an aircraft collision avoidance agent, also known as a traffic agent. One widely accepted concept of aircraft to aircraft communication for free flight environment is Automatic Dependent Surveillance Broadcast. In this research, the focus is on constructing a traffic agent, utilizing aircraft to aircraft information for flight management system. The agent includes a traffic conflict detection module and collision avoidance module. The method used by the modules is a combination of knowledge based expert system and optimal control. The expert system is the primary decision-maker and determines the appropriate actions required for conflict detection and avoidance. Optimal control is used to generate the optimum avoidance trajectory that adheres to the criteria assigned by the expert system. Results of various test cases presented in the research demonstrate that the combination of the two methods provides an efficient and effective way to obtain optimal traffic avoidance trajectories.

Shandy, Surya Utama

2002-01-01T23:59:59.000Z

50

Narrow field electromagnetic sensor system and method  

DOE Patents (OSTI)

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.

McEwan, T.E.

1996-11-19T23:59:59.000Z

51

The 2728 October 1986 FIRE Cirrus Case Study: Retrieval of Cloud Particle Sizes and Optical Depths from Comparative Analyses of Aircraft and Satellite-based Infrared Measurements  

Science Conference Proceedings (OSTI)

Infrared radiance measurements were acquired from a narrow-field nadir-viewing radiometer based on the NASA ER-2 aircraft during a coincident Landsat 5 overpass on 28 October 1986 as part of the FIRE Cirrus IFO in the vicinity of Lake Michigan. ...

Philip D. Hammer; Francisco P. J. Valero; Stefan Kinne

1991-07-01T23:59:59.000Z

52

The Use of Commercial Aircraft as Platforms for Environmental Measurements  

Science Conference Proceedings (OSTI)

The use of commercial aircraft for obtaining weather and climate change related information is beginning to accelerate at a rapid pace. A brief history of the use of commercial aircraft for these purposes is provided along with a discussion of ...

Rex J. Fleming

1996-10-01T23:59:59.000Z

53

Production of Ice Particles in Clouds Due to Aircraft Penetrations  

Science Conference Proceedings (OSTI)

Evidence is presented that the passage of an aircraft through supercooled clouds can produce high concentrations of ice particles (> 1000 L?1 at ?8C in one case). These Aircraft Produced Ice Particles (APIPs) are characterized, initially, both ...

Arthur L. Rangno; Peter V. Hobbs

1983-02-01T23:59:59.000Z

54

Multiple Aircraft Tracking System for Coordinated Research Missions  

Science Conference Proceedings (OSTI)

The Multiple Aircraft Position System (MAPS) was developed by the Convective Storms Division of the National Center for Atmospheric Research, in response to the need for aircraft position in the coordination of large field projects involving ...

Peter N. Johnson; Jack L. Fink

1982-05-01T23:59:59.000Z

55

Maintenance cost studies of rotary wing commercial transport aircraft  

E-Print Network (OSTI)

Introduction: The vertical take-off and landing (VTOL) aircraft market has had substantial growth in the period of the last ten years when one considers the overall number of aircraft in use. The military fleet has continued ...

Ausrotas, Raymond A.

1974-01-01T23:59:59.000Z

56

An Unmanned Aircraft for Dropwindsonde Deployment and Hurricane Reconnaissance  

Science Conference Proceedings (OSTI)

The prototype of a remotely piloted aircraft designed for research and operational reconnaissance of tropical cyclones has been developed and successfully test flown. Using modern aerodynamic and materials technology, the operational aircraft ...

John S. Langford; Kerry A. Emanuel

1993-03-01T23:59:59.000Z

57

Deduction of Vertical Motion in the Atmosphere from Aircraft Measurements  

Science Conference Proceedings (OSTI)

Equations for deducing the vertical motion of air based on aircraft measurements are presented along with derivations. The equations are based on the aircraft equations of motion, but due to different assumptions, the resulting equations are ...

Fred J. Kopp

1985-12-01T23:59:59.000Z

58

Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS)  

Science Conference Proceedings (OSTI)

A remotely piloted aircraft research facility is described that will provide new capabilities for atmospheric and oceanographic measurements. The aircraft can fly up to 24 h over remote ocean regions, at low or high altitude, and in various other ...

R. T. Bluth; P. A. Durkee; P. Finn; L. M. Russell; J. H. Seinfeld; R. C. Flagan; L. M. Russell; P. A. Crowley

1996-11-01T23:59:59.000Z

59

Reconstruction of Aircraft Trajectories from AMDAR Weather Reports  

Science Conference Proceedings (OSTI)

It is well known that aircraft-based meteorological measurements exhibit systematic errors depending on various flight dynamic parameters. It is also widely assumed that operational Aircraft Meteorological Data Relay (AMDAR) weather reports by ...

Clemens Dre

2011-07-01T23:59:59.000Z

60

The cost of noise reduction in commercial tilt rotor aircraft  

E-Print Network (OSTI)

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 ...

Faulkner, Henry B.

1974-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Measurement of Directional Wave Spectra Using Aircraft Laser Altimeters  

Science Conference Proceedings (OSTI)

A remote sensing method to measure directional oceanic surface waves by three laser altimeters on the NOAA LongEZ aircraft is investigated. To examine feasibility and sensitivity of the wavelet analysis method to various waves, aircraft motions, ...

J. Sun; S. P. Burns; D. Vandemark; M. A. Donelan; L. Mahrt; Timothy L. Crawford; T. H. C. Herbers; G. H. Crescenti; J. R. French

2005-07-01T23:59:59.000Z

62

Interaction of Ocean Tides through a Narrow Single Strait and Narrow Multiple Straits  

Science Conference Proceedings (OSTI)

The tidal interaction between two constant depth oceans joined by a rectangular strait of length d, width 2a and constant depth h was analyzed. The strait is narrow in the sense that the scale of the ocean tide in the absence of the strait is ...

Conrado A. Rocha C.Allan J. Clarke

1987-12-01T23:59:59.000Z

63

Toward the Improvement of Aircraft-Icing Forecasts for the Continental United States  

Science Conference Proceedings (OSTI)

An automated procedure is developed for detecting and forecasting atmospheric conditions conductive to aircraft icing over the continental United States. The procedure uses gridded output from the Nested-Grid Model, and is based on the manual ...

Paul Schultz; Marcia K. Politovich

1992-09-01T23:59:59.000Z

64

Atmospheric Gravity Waves and Aircraft Turbulence Encounters  

Science Conference Proceedings (OSTI)

We describe aircraft turbulence-atmospheric gravity wave events which occurred during a 2-day period over the Continental Divide. The waves are observed by two microbarograph networks an each side of the divide and last for several hours at a ...

A. J. Bedard Jr.; F. Canavero; F. Einaudi

1986-12-01T23:59:59.000Z

65

Two New Types of Ultrafast Aircraft Thermometer  

Science Conference Proceedings (OSTI)

A new version of an ultrafast aircraft resistance thermometer (UFT-F) with a time constant of the order 10?4 s,for use in both cloudy and cloudless air, is described. It evolved from an earlier version (UFT-S). Its sensing element is similar to ...

Krzysztof E. Haman; Szymon P. Malinowski; Bo?ena D. Stru?; Reinhold Busen; Andrzej Stefko

2001-02-01T23:59:59.000Z

66

Lidar Observations of Aircraft Exhaust Plumes  

Science Conference Proceedings (OSTI)

A series of field campaigns has been made at British airports using a rapid-scanning lidar and other instrumentation in order to measure the dispersion of exhaust plumes from commercial aircraft. The lidar operated at a wavelength of 355 nm and ...

Michael Bennett; Simon Christie; Angus Graham; David Raper

2010-10-01T23:59:59.000Z

67

Tunable pulsed narrow bandwidth light source  

DOE Patents (OSTI)

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.

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

2002-01-01T23:59:59.000Z

68

Price difference between Brent and WTI crude oil narrowing - Today ...  

U.S. Energy Information Administration (EIA)

The Brent-WTI spread, the difference between the prices of Brent and West Texas Intermediate (WTI) crude oils, has narrowed considerably over the past several months.

69

Using doppler radar images to estimate aircraft navigational heading error  

SciTech Connect

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.

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

2012-07-03T23:59:59.000Z

70

Dynamic power distribution management for all electric aircraft.  

E-Print Network (OSTI)

??In recent years, with the rapid development of electric and electronic technology, the All-Electric Aircraft (AEA) concept has attracted more and more attention, which only (more)

Xia, Xiuxian

2011-01-01T23:59:59.000Z

71

Reducing Costs in Aircraft: The Metals Affordability Initiative ...  

Science Conference Proceedings (OSTI)

Martin, R. "Affordable Metal Technologies For Military Aircraft. ... Ruhman, D., L. Pionke, and R. Martin, "Missiles and Space Systems with a Material Difference.

72

Atmospheric Energy Harvesting for Small Uninhabited Aircraft by Gust Soaring.  

E-Print Network (OSTI)

??Applying bird-inspired flight planning and control techniques to small robotic aircraft can greatly improve flight performance. This paper discusses a method for improving cruise performance (more)

Depenbusch, Nathan

2011-01-01T23:59:59.000Z

73

PROBABILISTIC LIFE OF DA718 FOR AIRCRAFT ENGINE DISKS  

Science Conference Proceedings (OSTI)

PROBABILISTIC LIFE OF DA718 FOR AIRCRAFT ENGINE DISKS. S.DEYBER. 1. , F.ALEXANDRE. 2. , J.VAISSAUD. 2. , A.PINEAU. 2. 1. Snecma Materials...

74

Insecticide Exposures on Commercial Aircraft: A Literature Review...  

NLE Websites -- All DOE Office Websites (Extended Search)

wasdeveloped specifically for deployment in the airliner ventilation system for long-term unattended monitoring of insecticide loading in the aircraft. Because access was not...

75

AIRCRAFT AND AIR SERVICE MANAGEMENT PROGRAMS, IG-0437 | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

owns seven aircraft that support defense programs, research and development efforts, emergency response programs, and official travel of Government and contractor employees....

76

ARM - Field Campaign - SUbsonic Aircraft: Contrail & Cloud Effects...  

NLE Websites -- All DOE Office Websites (Extended Search)

future subsonic aircraft fleet on Earth's radiation budget and climate. SUCCESS Mission Home Page Additional Information Tom Ackerman Address: Pennsylvania State University...

77

Use and Impact of Automated Aircraft Data in a Global 4DVAR Data Assimilation System  

Science Conference Proceedings (OSTI)

The use of automated aircraft data [Aircraft Meteorological Data Relay (AMDAR) and Aircraft Communication Addressing and Reporting System (ACARS)] has recently been extended in ECMWF's operational 4DVAR data assimilation system. Herein, a ...

Carla Cardinali; Lars Isaksen; Erik Andersson

2003-08-01T23:59:59.000Z

78

An Experimental Study of the Production of Ice Crystals by a Twin-Turboprop Aircraft  

Science Conference Proceedings (OSTI)

The University of Wyoming King Air (KA) research aircraft was used in controlled, in situ experiments to determine whether or not, and under what cloud and aircraft operating conditions, a twin-turboprop aircraft would itself produce ice crystals ...

Robert D. Kelly; Gabor Vali

1991-02-01T23:59:59.000Z

79

A Crew-Centered Flight Deck Design Philosophy for High-Speed Civil Transport (HSCT) Aircraft  

Science Conference Proceedings (OSTI)

Past flight deck design practices used within the U.S. commercial transport aircraft industry have been highly successful in producing safe and efficient aircraft. However, recent advances in automation have changed the way pilots operate aircraft, and ...

Palmer Michael T.; Rogers William H.; Press Hayes N.; Latorella Kara A.; Abbott Terence S.

1995-01-01T23:59:59.000Z

80

Multidisciplinary optimization of aircraft design and takeoff operations for low noise  

E-Print Network (OSTI)

Aircraft planform design, takeoff operations, and airfoil design are examined as a complete system in order to quantify tradeoffs that can result in a quiet aircraft. An aircraft design model was developed to generate ...

Jones, Anya Rachel

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

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

SciTech Connect

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.

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

82

Radiant Energy Power Source for Jet Aircraft  

DOE Green Energy (OSTI)

This report beings with a historical overview on the origin and early beginnings of Radiant Energy Power Source for Jet Aircraft. The report reviews the work done in Phase I (Grant DE-FG01-82CE-15144) and then gives a discussion of Phase II (Grant DE-FG01-86CE-15301). Included is a reasonably detailed discussion of photovoltaic cells and the research and development needed in this area. The report closes with a historical perspective and summary related to situations historically encountered on projects of this nature. 15 refs.

Doellner, O.L.

1992-02-01T23:59:59.000Z

83

V/STOL aircraft and method  

DOE Patents (OSTI)

Aircraft apparatus and method capable of V/STOL (vertical, short takeoff and landing) in addition to conventional flight. For V/STOL operation, induced lift is provided by blowing air over the upper surface of each wing through a duct installed near the leading edge. Intake air is supplied to the blowing fan through a duct installed near the trailing edge, thus providing suction as well as blowing. Two fans in series are required. The engine provides power not only to the propeller but also to a transmission which provides power to the pulleys driving the belt-driven fans.

Owens, Phillip R. (1417 Kirby St., NE., Albuquerque, NM 87112)

1997-01-01T23:59:59.000Z

84

V/STOL aircraft and method  

DOE Patents (OSTI)

Aircraft apparatus and method capable of V/STOL (vertical, short takeoff and landing) in addition to conventional flight are disclosed. For V/STOL operation, induced lift is provided by blowing air over the upper surface of each wing through a duct installed near the leading edge. Intake air is supplied to the blowing fan through a duct installed near the trailing edge, thus providing suction as well as blowing. Two fans in series are required. The engine provides power not only to the propeller but also to a transmission which provides power to the pulleys driving the belt-driven fans. 10 figs.

Owens, P.R.

1997-11-18T23:59:59.000Z

85

Morning Transition Tracer Experiments in a Deep Narrow Valley  

Science Conference Proceedings (OSTI)

Three sulfur hexafluoride atmospheric tracer experiments were conducted during the post-sunrise temperature inversion breakup period in the deep, narrow Brush Creek Valley of Colorado. Experiments were conducted under clear, undisturbed weather ...

C. David Whiteman

1989-07-01T23:59:59.000Z

86

A Narrow Clear Zone Over Florida and the Atlantic Ocean  

Science Conference Proceedings (OSTI)

A narrow cloud-free zone of large longitudinal extent was observed in visible and infrared satellite imagery on 21 September 1978. An attempt to explain the zone in terms of subsidence induced by a transverse frontal circulation is presented.

Andrew J. Negri; K. Robert Morris

1980-04-01T23:59:59.000Z

87

The Organization of Convection in Narrow Cold-Frontal Rainbands  

Science Conference Proceedings (OSTI)

Narrow cold-frontal rainbands are lines of intense precipitation that straddle surface cold fronts. Recent observational work has revealed that the rainfall within the band is organized into regularly spaced ellipsoidal cells called precipitation ...

G. W. Kent Moore

1985-09-01T23:59:59.000Z

88

Symbolic identification for fault detection in aircraft gas turbine engines  

E-Print Network (OSTI)

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

Ray, Asok

89

Objective Determination of Hurricane Tracks from Aircraft Observations  

Science Conference Proceedings (OSTI)

An algorithm for location of hurricane centers by least squares using aircraft data has been developed. As the aircraft traverses the eye, lines of position normal to the wind are constructed each 100 m along its track. An additional line of ...

Hugh E. Willoughby; Marcy B. Chelmow

1982-09-01T23:59:59.000Z

90

Flight Plan Specification and Management for Unmanned Aircraft Systems  

Science Conference Proceedings (OSTI)

This paper presents a new concept for specifying Unmanned Aircraft Systems (UAS) flight operations that aims at improving the waypoint based approach, found in most autopilot systems, by providing higher level fligh plan specification primitives. The ... Keywords: Flight plan management, Flight plan specification, Unmanned aircraft systems (UAS)

Eduard Santamaria; Enric Pastor; Cristina Barrado; Xavier Prats; Pablo Royo; Marc Perez

2012-07-01T23:59:59.000Z

91

The Collaborative ColoradoNebraska Unmanned Aircraft System Experiment  

Science Conference Proceedings (OSTI)

The Collaborative ColoradoNebraska Unmanned Aircraft System Experiment (CoCoNUE) was executed on 1 March and 30 September 2009. The principal objective of this project was to examine the feasibility of using a small unmanned aircraft operating semi-...

Adam L. Houston; Brian Argrow; Jack Elston; Jamie Lahowetz; Eric W. Frew; Patrick C. Kennedy

2012-01-01T23:59:59.000Z

92

High Resolution Aircraft Scanner Mapping of Geothermal and Volcanic Areas  

DOE Green Energy (OSTI)

High spectral resolution GEOSCAN Mkll multispectral aircraft scanner imagery has been acquired, at 3-6 m spatial resolutions, over much of the Taupo Volcanic Zone as part of continuing investigations aimed at developing remote sensing techniques for exploring and mapping geothermal and volcanic areas. This study examined the 24-band: visible, near-IR (NIR), mid-IR (MIR) and thermal-IR (TIR) imagery acquired over Waiotapu geothermal area (3 m spatial resolution) and White Island volcano (6 m resolution). Results show that color composite images composed of visible and NIR wavelengths that correspond to color infrared (CIR) photographic wavelengths can be useful for distinguishing among bare ground, water and vegetation features and, in certain cases, for mapping various vegetation types. However, combinations which include an MIR band ({approx} 2.2 {micro}m) with either visible and NIR bands, or two NIR bands, are the most powerful for mapping vegetation types, water bodies, and bare and hydrothermally altered ground. Combinations incorporating a daytime TIR band with NIR and MIR bands are also valuable for locating anomalously hot features and distinguishing among different types of surface hydrothermal alteration.

Mongillo, M.A.; Cochrane, G.R.; Wood, C.P.; Shibata, Y.

1995-01-01T23:59:59.000Z

93

Advanced aircraft ignition CRADA final report  

DOE Green Energy (OSTI)

Conventional commercial and military turbo-jet aircraft engines use capacitive discharge ignition systems to initiate fuel combustion. The fuel-rich conditions required to ensure engine re-ignition during flight yield less than optimal engine performance, which in turn reduces fuel economy and generates considerable pollution in the exhaust. Los Alamos investigated two approaches to advanced ignition: laser based and microwave based. The laser based approach is fuel ignition via laser-spark breakdown and via photo-dissociation of fuel hydrocarbons and oxygen. The microwave approach involves modeling, and if necessary redesigning, a combustor shape to form a low-Q microwave cavity, which will ensure microwave breakdown of the air/fuel mixture just ahead of the nozzle with or without a catalyst coating. This approach will also conduct radio-frequency (RF) heating of ceramic elements that have large loss tangents. Replacing conventional systems with either of these two new systems should yield combustion in leaner jet fuel/air mixtures. As a result, the aircraft would operate with (1) considerable less exhaust pollution, (2) lower engine maintenance, and (3) significantly higher fuel economy.

Early, J.W.

1997-03-01T23:59:59.000Z

94

Efficiency of Unmanned Aircraft Systems (UAS) Relative to Manned Aircraft for Surveying Bowhead Whale Distribution and Density in the Arctic  

E-Print Network (OSTI)

, interest in the use of Unmanned Aircraft Systems (UAS) as an aerial survey platform for studying BCB manned aircraft surveys as part of the Bowhead Whale Aerial Survey Project (BWASP) (Monnett and Treacy through funding from MMS (Fig. 1). BWASP and COMIDA aerial surveys followed a linetransect protocol

95

Comprehensive Technical Report, General Electric Direct-Air-Cycle Aircraft Nuclear Propulsion Program; Aircraft Nuclear Propulsion Application Studies  

SciTech Connect

This volume is one of twenty-one summarizing the Aircraft Nuclear Propulsion Program of the General Electric Company. This portion describes the studies of advanced applications of nuclear reactors that were performed, including various types of aircraft, missiles, space vehicles, ships, and portable power plants.

Comassar, S.

1962-04-30T23:59:59.000Z

96

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

E-Print Network (OSTI)

On 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 for generating an optimal sensor set [3]. 3. Aircraft gas turbine engines An aircraft gas turbine engine

Simon, Dan

97

Aircraft Low Altitude Wind Shear Detection and Warning System  

Science Conference Proceedings (OSTI)

There is now considerable evidence to substantiate the causal relationship between low altitude wind shear (LAWS) and the recent increase in low-altitude aircraft accidents. The National Research Council has found that for the period 1964 to 1982,...

Peter C. Sinclair; Peter M. Kuhn

1991-01-01T23:59:59.000Z

98

Aircraft Icing Measurements in East Coast Winter Storms  

Science Conference Proceedings (OSTI)

Analysis of the aircraft icing environments of East Coast winter storms have been made from 3 1 flights duringthe second Canadian Atlantic Storms Program. Microphysical parameters have been summarized and are compared to common icing intensity ...

Stewart G. Cober; George A. Isaac; J. W. Strapp

1995-01-01T23:59:59.000Z

99

Analysis of aircraft surface motion at Boston Logan International Airport  

E-Print Network (OSTI)

The purpose of this thesis is to examine the nature of aircraft surface motion on the airport surface during normal operations. Twelve hours of radar data, gathered by MIT Lincoln Laboratories from Logan airport in Boston, ...

Alhanatis, Robert Elias

100

Tropical Cyclone Observation and Forecasting with and without Aircraft Reconnaissance  

Science Conference Proceedings (OSTI)

The contributions of aircraft reconnaissance to the accuracy of tropical cyclone center positioning, motion, and intensity determinations are examined, along with their impact on the accuracy of track and intensity forecasting. The analyses ...

Joel D. Martin; William M. Gray

1993-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Jet Stream Winds: Comparisons of Aircraft Observations with Analyses  

Science Conference Proceedings (OSTI)

Wind measurements have been obtained from commercial aircraft crossing the 1992 winter subtropical jet streams over southwest and east Asia. Comparisons of these data with new, high-resolution analyses from four of the major operational centers ...

J. Tenenbaum

1996-06-01T23:59:59.000Z

102

DOE - Office of Legacy Management -- Northrup Aircraft Co Inc...  

Office of Legacy Management (LM)

for the propulsion of aircraft. CA.0-02-1 Site Disposition: Eliminated - No Authority - NRC licensed CA.0-02-1 CA.0-02-2 Radioactive Materials Handled: None Indicated CA.0-02-1...

103

Modeling of a Signal Processing System for Aircraft Air Data...  

NLE Websites -- All DOE Office Websites (Extended Search)

Modeling of a Signal Processing System for Aircraft Air Data Instrumentation Speaker(s): Thomas John Rohloff Date: September 21, 1998 - 12:00pm Location: 90-3148 Seminar HostPoint...

104

A review of extended-range operations by transport aircraft  

E-Print Network (OSTI)

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 ...

Simpson, R. W.

1987-01-01T23:59:59.000Z

105

ADWICE: Advanced Diagnosis and Warning System for Aircraft Icing Environments  

Science Conference Proceedings (OSTI)

This paper describes the design of the Advanced Diagnosis and Warning System for Aircraft Icing Environments (ADWICE) and presents results for two different icing weather situations with typical icing conditions. ADWICE has been in development ...

A. Tafferner; T. Hauf; C. Leifeld; T. Hafner; H. Leykauf; U. Voigt

2003-04-01T23:59:59.000Z

106

Statistics and Dynamics of Aircraft Encounters of Turbulence over Greenland  

Science Conference Proceedings (OSTI)

Historical records of aviation turbulence encounters above Greenland are examined for the period from 2000 to 2006. These data identify an important flow regime that contributes to the occurrence of aircraft turbulence encounters, associated with ...

Todd P. Lane; James D. Doyle; Robert D. Sharman; Melvyn A. Shapiro; Campbell D. Watson

2009-08-01T23:59:59.000Z

107

Turbulent Moisture Measurements aboard Instrumented Aircraft with a Capacitive Sensor  

Science Conference Proceedings (OSTI)

The authors show how a capacitive device measuring moisture can be used aboard instrumented atmospheric aircraft as an alternate sensor for turbulence measurement. Using a calibrated Lyman-? sensor as a reference, the time response of the ...

Pierre Durand; Gabriel Abadie; Aim Druilhet

1995-08-01T23:59:59.000Z

108

Improving commonality implementation in the cockpits of commercial aircraft  

E-Print Network (OSTI)

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 ...

Bador, Damien (Damien Pierre Marcellin Dominique)

2007-01-01T23:59:59.000Z

109

Characterizations of Aircraft Icing Environments that Include Supercooled Large Drops  

Science Conference Proceedings (OSTI)

Measurements of aircraft icing environments that include supercooled large drops (SLD) greater than 50 ?m in diameter have been made during 38 research flights. These flights were conducted during the First and Third Canadian Freezing Drizzle ...

Stewart G. Cober; George A. Isaac; J. Walter Strapp

2001-11-01T23:59:59.000Z

110

Comparison of Aircraft Observations with Mixed-Phase Cloud Simulations  

Science Conference Proceedings (OSTI)

In order to provide guidance for the further improvement of a mixed-phase cloud scheme being developed for use in an NWP model, comparisons of dynamical, thermodynamical, and microphysical variables between in situ aircraft data and model data ...

Paul A. Vaillancourt; Andr Tremblay; Stewart G. Cober; George A. Isaac

2003-04-01T23:59:59.000Z

111

Computationally Efficient Methods of Collocating Satellite, Aircraft, and Ground Observations  

Science Conference Proceedings (OSTI)

The usefulness of measurements from satellite-borne instruments is enhanced if these measurements can be compared to measurements from other instruments mounted aboard the same or different satellite, with measurements from aircraft, or with ...

Frederick W. Nagle; Robert E. Holz

2009-08-01T23:59:59.000Z

112

CHARBEL FARHAT Vivian Church Hoff Professor of Aircraft Structures  

E-Print Network (OSTI)

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

Farhat, Charbel

113

Acoustic Design of Aircraft Gas Turbine Test Cells  

Science Conference Proceedings (OSTI)

The high noise level associated with aircraft gas turbine operation creates two noise problems: (1) The reduction of the noise in the neighborhood of the installation to an acceptable level

R. O. Fehr; R. J. Wells; T. L. Bray

1952-01-01T23:59:59.000Z

114

TOGA COARE Aircraft Mission Summary Images: An Electronic Atlas  

Science Conference Proceedings (OSTI)

An electronic atlas of research aircraft missions in TOGA COARE (Tropical Ocean Global Atmosphere Coupled Ocean-Atmosphere Response Experiment) has been prepared and is available on the Internet via World Wide Web browsers such as Mosaic. These ...

S. E. Yuter; R. A. Houze Jr.; S. R. Brodzik; B. F. Smull; J. R. Daugherty; F. D. Marks Jr.

1995-03-01T23:59:59.000Z

115

Meteorological Instrumentation System on the T-28 Thunderstorm Research Aircraft  

Science Conference Proceedings (OSTI)

A T-28 aircraft was specially modified to permit gathering in situ cloud physics and dynamics data from the interior regions of hailstorms. Since its first use in 1969, the T-28 instrumentation and data acquisition system has undergone ...

Gary N. Johnson; Paul L. Smith Jr.

1980-09-01T23:59:59.000Z

116

Evaluation of control systems for automated aircraft wing manufacturing  

E-Print Network (OSTI)

The Boeing Company is looking to bring aircraft manufacturing technology into the 21st century. As part of this process, several projects have been started to develop the technologies required to achieve Boeing's vision ...

Herrera, Jason (Jason Richard)

2013-01-01T23:59:59.000Z

117

Development of an autoland system for general aviation aircraft  

E-Print Network (OSTI)

Accidents due to engine failure, pilot disorientation or pilot incapacitation occur far more frequently in general aviation than in commercial aviation, yet general aviation aircraft are equipped with less safety-enhancing ...

Siegel, Diana

2012-01-01T23:59:59.000Z

118

Aircraft Investigation of Mesoscale Cellular Convection During AMTEX 75  

Science Conference Proceedings (OSTI)

The 1 s data set collected by the NCAR Electra research aircraft in the presence of closed mesoscale cellular convection (MCC) has been examined for the purpose of determining the convective wind field and horizontal profiles of temperature and ...

Jeffry Rothermel; Ernest M. Agee

1980-05-01T23:59:59.000Z

119

Sampling Characteristics of an Aircraft-Borne Aerosol Inlet System  

Science Conference Proceedings (OSTI)

When sampling aerosol particles from aircraft, the inlet system is the most critical item because it can strongly modify the number concentration, size distribution, and chemical composition of the particles. In this investigation, the authors ...

M. Hermann; F. Stratmann; M. Wilck; A. Wiedensohler

2001-01-01T23:59:59.000Z

120

Racoro Extended-Term Aircraft Observations of Boundary Layer Clouds  

Science Conference Proceedings (OSTI)

A first-of-a-kind, extended-term cloud aircraft campaign was conducted to obtain an in situ statistical characterization of continental boundary layer clouds needed to investigate cloud processes and refine retrieval algorithms. Coordinated by the ...

Andrew M. Vogelmann; Greg M. McFarquhar; John A. Ogren; David D. Turner; Jennifer M. Comstock; Graham Feingold; Charles N. Long; Haflidi H. Jonsson; Anthony Bucholtz; Don R. Collins; Glenn S. Diskin; Hermann Gerber; R. Paul Lawson; Roy K. Woods; Elisabeth Andrews; Hee-Jung Yang; J. Christine Chiu; Daniel Hartsock; John M. Hubbe; Chaomei Lo; Alexander Marshak; Justin W. Monroe; Sally A. McFarlane; Beat Schmid; Jason M. Tomlinson; Tami Toto

2012-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

A Small Aircraft Transportation System (SATS) Demand Model  

Science Conference Proceedings (OSTI)

The Small Aircraft Transportation System (SATS) demand modeling is a tool that will be useful for decision makers to analyze SATS demands in both airport and airspace. We constructed a series of models following the general top- down, modular principles ...

Long Dou; Lee David; Johnson Jesse; Kostiuk Peter

2001-06-01T23:59:59.000Z

122

M28 Fixed wing transport aircraft cost reduction  

E-Print Network (OSTI)

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 ...

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

2011-01-01T23:59:59.000Z

123

On the Decay of Tropical Cyclone Winds Crossing Narrow Landmasses  

Science Conference Proceedings (OSTI)

A method is developed to adjust the Kaplan and DeMaria tropical cyclone inland wind decay model for storms that move over narrow landmasses. The basic assumption that the wind speed decay rate after landfall is proportional to the wind speed is ...

Mark DeMaria; John A. Knaff; John Kaplan

2006-03-01T23:59:59.000Z

124

HTTP: An Evolvable Narrow Waist for the Future Internet  

E-Print Network (OSTI)

personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission. HTTP: An Evolvable Narrow Waist for the Future Internet

Lucian Popa; Patrick Wendell; Ali Ghodsi; Ion Stoica

2012-01-01T23:59:59.000Z

125

Narrow focus ultra-wideband antenna for breast cancer detection  

Science Conference Proceedings (OSTI)

A narrow focus ultra-wideband dielectric-filled antenna has been designed for the purpose of near-field breast cancer detection without the use of coupling media. Instead of immersing the antenna in a lossy liquid coupling medium, direct matching of ... Keywords: antenna feeds, antennas, breast cancer detection, directional, radar-based imaging, ultra-wide band

Daniel M. Hailu; Safieddin Safavi-Naeini

2009-01-01T23:59:59.000Z

126

Project title: The silent aircraft initiative (Knowledge Integration Community)  

E-Print Network (OSTI)

to very high loads on the fan blades that go beyond the limit of current designs. A New Type of Undercarriage is Needed It is hard to believe, but the airframe of a landing aircraft is now about as noisy as the engines. The steady reduction in engine... community, the Silent Aircraft Initiative seeks to produce a truly optimised concept design that is technically feasible, economically viable and contributes to the prosperity of the UK in an environmentally sustainable way. Knowledge Integration Communities...

2009-10-13T23:59:59.000Z

127

Body Composition.  

E-Print Network (OSTI)

??Kelley Evanss dissertation consists of a collection of personal essays, which foreground the experience of the body. In four sections Sensation, Chaos/Control, Movement, Inward/Outward she (more)

Evans, Kelley E.

2008-01-01T23:59:59.000Z

128

MHK Projects/Wrangell Narrows Tidal Energy Project | Open Energy  

Open Energy Info (EERE)

Wrangell Narrows Tidal Energy Project Wrangell Narrows Tidal Energy Project < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":56.6324,"lon":-132.936,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

129

MHK Projects/Castine Harbor Badaduce Narrows | Open Energy Information  

Open Energy Info (EERE)

Castine Harbor Badaduce Narrows Castine Harbor Badaduce Narrows < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.9294,"lon":-68.6172,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

130

MHK Projects/Lubec Narrows Tidal | Open Energy Information  

Open Energy Info (EERE)

Lubec Narrows Tidal Lubec Narrows Tidal < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.8652,"lon":-66.9828,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

131

Narrow groove welding gas diffuser assembly and welding torch  

DOE Patents (OSTI)

A diffuser assembly is provided for narrow groove welding using an automatic gas tungsten arc welding torch. The diffuser assembly includes 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.

Rooney, Stephen J.

2000-02-04T23:59:59.000Z

132

Narrow groove welding gas diffuser assembly and welding torch  

DOE Patents (OSTI)

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.

Rooney, Stephen J. (East Berne, NY)

2001-01-01T23:59:59.000Z

133

Body fat  

NLE Websites -- All DOE Office Websites (Extended Search)

Body fat Body fat Name: Vincent Peri Status: N/A Age: N/A Location: N/A Country: N/A Date: N/A Question: What is fat? How does it accumulate in your body? Replies: Fat that is seen is a result of the multiplication and swelling of fat cells under the skin. The cells accumulate fat when times are good. In other words, when your caloric intake is greater than your caloric output, there is a tendency to accumulate fat. Fat is produced by using glucose ( a type of sugar) as the precursor molecule to create the building blocks for the creation of fat, a polymer known class known as lipid. Fat that is ingested must first be broken down before it is converted into fat in the body. Thus, it takes more energy to synthesize fat from fat than it does from simple carbohydrates. People who calorie count need to watch the amount of fat in foods because fat contains more calories per dry weight than protein or carbohydrates. Since fat does not include water and plants and vegetables are mostly water, a small amount of fat will have the same amount of calories as heaping portions of some vegetables. I hope I was clear. Oh yeah, there are many different kinds of lipids (including cholesterol) that are not the same as the the lipids that comprise the majority of fat deposits. This is only the tip of the ice berg and my description is purposely incomplete. Hope it helps.

134

Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction  

NLE Websites -- All DOE Office Websites (Extended Search)

DOD-DOE Aircraft DOD-DOE Aircraft Petroleum Use Reduction Workshop to someone by E-mail Share Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction Workshop on Facebook Tweet about Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction Workshop on Twitter Bookmark Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction Workshop on Google Bookmark Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction Workshop on Delicious Rank Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction Workshop on Digg Find More places to share Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications

135

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

E-Print Network (OSTI)

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 ...

Cullen, Timothy M

2011-01-01T23:59:59.000Z

136

General Matrix Inversion Technique for the Calibration of Electric Field Sensor Arrays on Aircraft Platforms  

Science Conference Proceedings (OSTI)

A matrix calibration procedure has been developed that uniquely relates the electric fields measured at the aircraft with the external vector electric field and net aircraft charge. The calibration method can be generalized to any reasonable ...

D. M. Mach; W. J. Koshak

2007-09-01T23:59:59.000Z

137

An Example of the Behavior of an Aircraft with Accumulated Ice: Latent Instability  

Science Conference Proceedings (OSTI)

Many directly measured aircraft performance details related to the unstable behavior of the Desert Research Institute's (DRI) research aircraft after ice accumulation, which led directly to its crash were recorded on its final flight. The data ...

James W. Telford

1988-10-01T23:59:59.000Z

138

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

E-Print Network (OSTI)

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. ...

Hansman, Robert John

139

Assessment of the Role of Aircraft Reconnaissance on Tropical Cyclone Analysis and Forecasting  

Science Conference Proceedings (OSTI)

The impact of aircraft reconnaissance on tropical cyclone (TC) observation and forecasting is assessed. The motivation for this assessment is the termination of Department of Defense (DOD) aircraft reconnaissance in the northwest Pacific in 1987 ...

William M. Gray; Charles Neumann; Ted L. Tsui

1991-12-01T23:59:59.000Z

140

Dual-Aircraft Investigation of the Inner Core of Hurricane Norbert. Part I: Kinematic Structure  

Science Conference Proceedings (OSTI)

On 2425 September 1984 air motions and physical processes in the eyewall region of Hurricane Norbert were investigated with two National Oceanic and Atmospheric Administration (NOAA) Aircraft Operations Center (AOC) WP-3D research aircraft. One ...

Frank D. Marks Jr.; Robert A. Houze Jr.; John F. Gamache

1992-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Calibration Results for NOAA-11 AVHRR Channels 1 and 2 from Congruent Path Aircraft Observations  

Science Conference Proceedings (OSTI)

A method for using congruent atmospheric path aircraft-satellite observations to calibrate a satellite radiometer is presented. A calibrated spectroradiometer aboard a NASA ER-2 aircraft at an altitude of 19 km above White Sands, New Mexico, was ...

Peter Abel; B. Guenther; Reginald N. Galimore; John W. Cooper

1993-08-01T23:59:59.000Z

142

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

E-Print Network (OSTI)

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 ...

Dakhel, Pierre Max

2005-01-01T23:59:59.000Z

143

The JET2000 Project: Aircraft Observations of the African Easterly Jet and African Easterly Waves  

Science Conference Proceedings (OSTI)

Scientific background and motivation for the JET2000 aircraft observing campaign that took place in West Africa during the last week of August 2000 are presented. The Met Research Flight C130 aircraft made two flights along the African easterly ...

C. D. Thorncroft; D. J. Parker; R. R. Burton; M. Diop; J. H. Ayers; H. Barjat; S. Devereau; A. Diongue; R. Dumelow; D. R. Kindred; N. M. Price; M. Saloum; C. M. Tayor; A. M. Tompkins

2003-03-01T23:59:59.000Z

144

Development of a rapid global aircraft emissions estimation tool with uncertainty quantification  

E-Print Network (OSTI)

Aircraft emissions impact the environment by changing the radiative balance of the atmosphere and impact human health by adversely affecting air quality. Many tools used to quantify aircraft emissions are not open source ...

Simone, Nicholas W. (Nicholas William)

2013-01-01T23:59:59.000Z

145

CARIBICCivil Aircraft for Global Measurement of Trace Gases and Aerosols in the Tropopause Region  

Science Conference Proceedings (OSTI)

The deployment of measurement equipment in passenger aircraft for the observation of atmospheric trace constituents is described. The package of automated instruments that is installed in a one-ton-capacity aircraft freight container positioned ...

C. A. M. Brenninkmeijer; P. J. Crutzen; H. Fischer; H. Gsten; W. Hans; G. Heinrich; J. Heintzenberg; M. Hermann; T. Immelmann; D. Kersting; M. Maiss; M. Nolle; A. Pitscheider; H. Pohlkamp; D. Scharffe; K. Specht; A. Wiedensohler

1999-10-01T23:59:59.000Z

146

A Three-Aircraft Intercomparison of Two Types of Air Motion Measurement Systems  

Science Conference Proceedings (OSTI)

We present procedures to evaluate air motion measurements on two or more aircraft by flying them in formation at a known lateral displacement. The analysis is applied to two formation flights involving three aircraftthe NCAR Electra, Sabreliner ...

D. H. Lenschow; E. R. Miller; R. B. Friesen

1991-02-01T23:59:59.000Z

147

Comparisons of SSM/I Liquid Water Paths with Aircraft Measurements  

Science Conference Proceedings (OSTI)

Comparisons have been made between in situ aircraft measurements of integrated liquid water and retrievals of integrated liquid water path (LWP) from algorithms using SSM/I brightness temperatures. The aircraft measurements were made over the ...

Stewart G. Cober; Andre Tremblay; George A. Isaac

1996-03-01T23:59:59.000Z

148

An Instrumented Aircraft for Atmospheric Research in New Zealand and the South Pacific  

Science Conference Proceedings (OSTI)

The New Zealand Meteorological Service has instrumented a Fokker Friendship F27 aircraft as part of its research program in meteorology and the atmospheric sciences. The aircraft, which has large underwing pylons to carry sampling probes, has ...

H. R. Larsen; G. W. Fisher; R. A. Knobben; I. S. Lechner; M. J. Harvey

1991-02-01T23:59:59.000Z

149

Absorption of Solar Radiation by Stratocumulus Clouds: Aircraft Measurements and Theoretical Calculations  

Science Conference Proceedings (OSTI)

Aircraft observations of shortwave radiative properties of stratocumulus clouds were carried out over the western North Pacific Ocean during January 1991. Two aircraft were equipped with a pair of pyranometers and near-infrared pyranometers. ...

Tadahiro Hayasaka; Nobuyuki Kikuchi; Masayuki Tanaka

1995-05-01T23:59:59.000Z

150

Conceptual design for a laminar-flying-wing aircraft  

E-Print Network (OSTI)

flow velocity distribution for the 30? (quarter-chord) sweep X-21A aircraft (Joslin (1998a)). . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.10 Example suction flow velocity distribution for the 10? (quarter-chord) sweep Vampire aircraft (from... /h , equivalent diameter for rectangular conduits D = diameter e = Oswald efficiency f = friction factor g = 9.81 m/s2, gravitational acceleration h = chamber height Hw = wingtip-fin height H12 = ?1/?2, shape factor H32 = ?3/?2, energy shape factor k = P? ? P...

Saeed, Tariq Issam

2012-06-12T23:59:59.000Z

151

eGSE America: Electric Aircraft Cargo Conveyor Technical Specification  

NLE Websites -- All DOE Office Websites (Extended Search)

EACC Technical Specifications EACC Technical Specifications eGSE America: Electric Aircraft Cargo Conveyor (EACC) Technical Specifications Revision 00 August 2005 Prepared by Electric Transportation Applications eGSE America: EACC Technical Specifications 1.0 SCOPE: This document outlines the design and performance requirements for a battery- powered, self propelled belt conveyor for handling baggage and cargo at aircraft bulk cargo holds. The use of "shall" in this document indicates a mandatory requirement. The use of "should" indicates a recommendation or that which is advised but not required. 2.0 APPLICABLE DOCUMENTS: Portions of the following documents to the extent specified herein are a part of this Recommended Practice.

152

Woodruff Narrows low head hydroelectric power plant feasibility determination  

DOE Green Energy (OSTI)

Woodruff Narrows Reservoir, owned by the State of Utah, was built in 1961 as an irrigation reservoir. The reservoir outlet works and spillway are in need of repair, and plans have been made to enlarge the reservoir from its present capacity of 28,000 acre-feet to 53,200 acre-feet when these repairs are made. The purpose of this study was to determine if it is feasible to add hydropower facilities when the reservoir is repaired and enlarged. A computer simulation model based on mean monthly values, utilizing 26 years of recorded streamflow into the reservoir, was used to determine the mean annual energy potential for the following configurations: (1) present dam, (2) the proposed enlarged dam, (3) a new dam at the lower site with a maximum head of 65 feet, and (4) a new dam at the lower site which would store water to the same elevation as the proposed enlarged dam. Results of the simulation study show that maximum power capacities are respectively 2.1, 3.0, 3.9, and 4.5 megawatts. The marketing potential for this electric power, cost estimates and financial analysis, and environmental, social, and regulatory aspects of the proposed hydropower facilities were evaluated. The results showed the addition of hydroelectric power development at the Woodruff Narrows site would have minimal social and environmental effects on the area, would result in little or no changes in the present patterns of water and land use, income, population, and employment and would not result in any significant changes of the social structure or characteristics of the area. However, hydroelectric power development at the Woodruff Narrows site is not economically feasible at the present time. (LCL)

Not Available

1979-03-01T23:59:59.000Z

153

Narrow-band optical transmission of metallic nanoslit arrays  

Science Conference Proceedings (OSTI)

Metallic nanoslit arrays usually demonstrate wide transmission bands for transverse-magnetic-polarized incidence light. Here, we show that by introducing multi-dielectric layers underneath the metallic structure layer on the substrate, a narrow peak is formed, whose bandwidth can be down to a few nanometers. Three types of resonance modes in the region under the metal layer are identified responsible for the formation of the peak, i.e., a two-dimensional cavity resonance mode, which supports optical transmission, and two in-plane hybrid surface plasmon resonance modes locating on both sides of the peak that suppresses the transmission. Such structures can be applied in advanced photonic devices.

Sun Zhijun; Yang Ying; Zuo Xiaoliu [Department of Physics, Xiamen University, Xiamen 361005 (China)

2012-10-22T23:59:59.000Z

154

The stochastic nature induced by laser noise in narrow transitions  

E-Print Network (OSTI)

We use a probabilistic method to describe the effect of laser noise on the laser-atom interaction, in the case that the atom is a two level system without spontaneous emission. The stochastic differential equation for the laser-atom interaction is analyzed in the sense of perturbation approach, and we construct a stochastic process corresponding to the time evolution of the atom's wave function, whose extra randomness is induced by the laser noise. It also provides the layout of a theory for the possible experiment of measuring the laser line width by driving a narrow atomic transition.

Sun, Yuan

2013-01-01T23:59:59.000Z

155

The stochastic nature induced by laser noise in narrow transitions  

E-Print Network (OSTI)

We use a probabilistic method to describe the effect of laser noise on the laser-atom interaction, in the case that the atom is a two level system without spontaneous emission. The stochastic differential equation for the laser-atom interaction is analyzed in the sense of perturbation approach, and we construct a stochastic process corresponding to the time evolution of the atom's wave function, whose extra randomness is induced by the laser noise. It also provides the layout of a theory for the possible experiment of measuring the laser line width by driving a narrow atomic transition.

Yuan Sun; Chen Zhang

2013-07-08T23:59:59.000Z

156

Aircraft-produced Ice Particles (APIPs) in Supercooled Clouds and the Probable Mechanism for their Production  

Science Conference Proceedings (OSTI)

This paper presents the results of studies of aircraft-produced ice particles (APIPs) in supercooled fog over Mono Lake, California. The King Air 200T cloud physics aircraft of the University of Wyoming and three other aircraft (a Piper Aztec, a ...

William L. Woodley; Thomas J. Henderson; Bernard Vonnegut; Glenn Gordon; Robert Breidenthal; Shirley M. Holle

1991-11-01T23:59:59.000Z

157

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

E-Print Network (OSTI)

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

Ray, Asok

158

Real-Time Participant Feedback from the Symposium for Civilian Applications of Unmanned Aircraft Systems  

Science Conference Proceedings (OSTI)

The Symposium for Civilian Applications of Unmanned Aircraft Systems was held 1---3 October 2007 in Boulder, Colorado. The purpose of the meeting was to develop an integrated vision of future Unmanned Aircraft Systems with input from stakeholders in ... Keywords: Civil applications, UAS, Unmannned aircraft system

Brian Argrow; Elizabeth Weatherhead; Eric W. Frew

2009-03-01T23:59:59.000Z

159

Aircraft-Produced Ice Particles (APIPs): Additional Results and Further Insights  

Science Conference Proceedings (OSTI)

This paper presents new results from studies of aircraft-produced ice particles (APIPs) in supercooled fog and clouds. Nine aircraft, including a Beech King Air 200T cloud physics aircraft, a Piper Aztec, a Cessna 421-C, two North American T-28s, ...

William L. Woodley; Glenn Gordon; Thomas J. Henderson; Bernard Vonnegut; Daniel Rosenfeld; Andrew Detwiler

2003-05-01T23:59:59.000Z

160

Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gromann1  

E-Print Network (OSTI)

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

Jüttler, Bert

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Deformable human body model development  

SciTech Connect

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). A Deformable Human Body Model (DHBM) capable of simulating a wide variety of deformation interactions between man and his environment has been developed. The model was intended to have applications in automobile safety analysis, soldier survivability studies and assistive technology development for the disabled. To date, we have demonstrated the utility of the DHBM in automobile safety analysis and are currently engaged in discussions with the U.S. military involving two additional applications. More specifically, the DHBM has been incorporated into a Virtual Safety Lab (VSL) for automobile design under contract to General Motors Corporation. Furthermore, we have won $1.8M in funding from the U.S. Army Medical Research and Material Command for development of a noninvasive intracranial pressure measurement system. The proposed research makes use of the detailed head model that is a component of the DHBM; the project duration is three years. In addition, we have been contacted by the Air Force Armstrong Aerospace Medical Research Laboratory concerning possible use of the DHBM in analyzing the loads and injury potential to pilots upon ejection from military aircraft. Current discussions with Armstrong involve possible LANL participation in a comparison between DHBM and the Air Force Articulated Total Body (ATB) model that is the current military standard.

Wray, W.O.; Aida, T.

1998-11-01T23:59:59.000Z

162

Beyond Boundary Objects: Collaborative Reuse in Aircraft Technical Support  

Science Conference Proceedings (OSTI)

Boundary objects are a critical, but understudied, theoretical construct in CSCW. Through a field study of aircraft technical support, we examined the role of boundary objects in the practical achievement of safety by service engineers. Their resolution ... Keywords: boundary objects, collaborative work, high reliability organizations, hotlines, information reuse, organizational memory, safety, service engineering, technical support

Wayne G. Lutters; Mark S. Ackerman

2007-06-01T23:59:59.000Z

163

Kaizen and Stochastic Networks Support the Investigation of Aircraft Failures  

Science Conference Proceedings (OSTI)

Investigating the causes of aircraft failures and preventing their reoccurrence are crucial to achieving and maintaining a high flight safety level; technical failure-analysis teams usually perform these functions. We developed and applied a dual-phased ... Keywords: applications, engineering, graphs, networks, queues, simulation

Izack Cohen

2010-05-01T23:59:59.000Z

164

On Optimization of Sensor Selection for Aircraft Gas  

E-Print Network (OSTI)

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

Simon, Dan

165

Future aircraft and potential effects on stratospheric ozone and climate  

Science Conference Proceedings (OSTI)

The purpose of this study is to extend the recent research examining the global environmental effects from potential fleets of subsonic and supersonic commercial aircraft. Initial studies with LLNL models of global atmospheric chemical, radiative, and transport processes have indicated that substantial decreases in stratospheric ozone concentrations could result from emissions of NO{sub x} from aircraft flying in the stratosphere, depending on fleet size and magnitude of the engine emissions. These studies used homogeneous chemical reaction rates (e.g. gas-phase chemistry). Recent evidence indicates that reactions on particles in the stratosphere may be important. Heterogeneous chemical reactions, for instance, N{sub 2}O{sub 5}and ClONO{sub 2} on background sulfuric acid aerosols, convert NO{sub x}(NO and NO{sub 2}) molecules to HNO{sub 3}. This decreases the odd oxygen loss from the NO{sub x} catalytic cycle and increases the odd oxygen loss from the Cl{sub x} catalytic cycle. By including these heterogeneous reactions in the LLNL model, the relative partitioning of odd oxygen loss between these two families changes, with the result that emissions of NO{sub x} from proposed aircraft fleets flying in the stratosphere now increase zone. Having these heterogeneous processes present also increases ozone concentration in the troposphere relative to gas-phase only chemistry calculations for emissions of NO{sub x} from subsonic aircraft. 26 refs., 5 figs., 3 tabs.

Kinnison, D.E.; Wuebbles, D.J.

1991-10-01T23:59:59.000Z

166

The Effects of Aircraft Wake Dynamics on Contrail Development  

Science Conference Proceedings (OSTI)

Results of large-eddy simulations of the development of young persistent ice contrails are presented, concentrating on the interactions between the aircraft wake dynamics and the ice cloud evolution over ages from a few seconds to 30 min. The 3D ...

D. C. Lewellen; W. S. Lewellen

2001-02-01T23:59:59.000Z

167

A Radio-Controlled Aircraft to Investigate Atmospheric Turbulence  

Science Conference Proceedings (OSTI)

A radio-controlled aircraft model to investigate atmospheric turbulence is described. The model with an airspeed of 2040 m s?1 in the height range between 5 and 550 m and the flight time up to 30 min was equipped to carry a useful load weighing ...

Vitaly P. Kukharets; L. R. Tsvang

1998-02-01T23:59:59.000Z

168

The Meteorological Measurement System on the NASA ER-2 Aircraft  

Science Conference Proceedings (OSTI)

A Meteorological Measurement System (MMS) was designed and installed on one of the NASA high-altitude ER-2 aircraft (NASA 706). The MMS provides in situ measurements of free-stream pressure (0.3 mb), temperature (0.3C), and wind vector (1 m s?...

Stan G. Scott; T. Paul Bui; K. Roland Chan; Stuart W. Bowen

1990-08-01T23:59:59.000Z

169

Volumetric Geometry Reconstruction of Turbine Blades for Aircraft Engines  

E-Print Network (OSTI)

Volumetric Geometry Reconstruction of Turbine Blades for Aircraft Engines David Gro?mann1 and Bert-spline parametrization of turbine blades from measurement data generated by optical scanners. This new representation elements. We focus on the industrial applicability of the framework, by using standard turbine blade

Jüttler, Bert

170

RANS-based Aerodynamic Shape Optimization of a Blended-Wing-Body Aircraft  

E-Print Network (OSTI)

-loading allows the BWB to have excellent low-speed flight characteristics as well, making heavy high lift] and Wakayama [7, 8] presented the multidisciplinary design optimization (MDO) of the Boeing BWB- 450 using

Papalambros, Panos

171

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

E-Print Network (OSTI)

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

Ray, Asok

172

Characteristics of crystallization of complex plasmas in narrow channels  

SciTech Connect

Molecular dynamics simulations are performed to analyze the dependence of the behavior of complex (dusty) plasmas in narrow three-dimensional channels on the confining potential. Dynamics of micrometer-sized particles is modeled by using Langevin thermostat and Yukawa (screened Coulomb) pair interaction potential. A detailed analysis shows that confinement strongly affects plasma crystallization characteristics and local ordering of dust grains. In particular, the formation of a new, quasi-crystalline phase induced by hard-wall confinement is revealed. Transitions between different lattice symmetries induced by changes in channel width are examined. Strong dependence of the transverse dust density profile on the shielding parameter (ratio between mean interparticle distance and screening length) can be used to manipulate the dust-grain flux in such a system.

Klumov, B. A., E-mail: klumov@mpe.pmg.de; Morfill, G. E. [Max-Planck-Institut fuer Extraterrestrische Physik (Germany)

2008-11-15T23:59:59.000Z

173

Long-pulse-width narrow-bandwidth solid state laser  

DOE Patents (OSTI)

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.

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

1997-01-01T23:59:59.000Z

174

Narrow Field of View Zenith Radiometer (NFOV) Handbook  

SciTech Connect

The two-channel narrow field-of-view radiometer (NFOV2) is a ground-based radiometer that looks straight up and measures radiance directly above the instrument at wavelengths of 673 and 870 nm. The field-of-view of the instrument is 1.2 degrees, and the sampling time resolution is one second. Measurements of the NFOV2 have been used to retrieve optical properties for overhead clouds that range from patchy to overcast. With a one-second sampling rate of the NFOV2, faster than almost any other ARM Climate Research Facility (ACRF) instrument, we are able, for the first time, to capture changes in cloud optical properties at the natural time scale of cloud evolution.

Chiu, C; Marshak, A; Hodges, G; Barnard, JC; Schmelzer, J

2008-11-01T23:59:59.000Z

175

An Explanation for Intense Frontal Updrafts and Narrow Cold-Frontal Rainbands  

Science Conference Proceedings (OSTI)

Measurements with Doppler radar, and instrumented aircraft and towers, have revealed that surface cold fronts often have cross-frontal circulations organized on a scale of a kilometer or less. These circulations include intense updrafts (1 to 20 ...

David B. Parsons

1992-10-01T23:59:59.000Z

176

DOD-DOE Aircraft Petroleum Use Reduction Workshop Agenda  

NLE Websites -- All DOE Office Websites (Extended Search)

DOD-DOE Workshop DOD-DOE Workshop Aircraft Petroleum Use Reduction: Can Fuel Cells be a Game Changer? U.S. Department of Energy, Washington, DC 4 th Floor Conference Room (4A-104) September 30, 2010 8:30 am to 5 pm Agenda 8:30 am Welcome, introductions and mtg logistics: Pete Devlin (DOE EERE FCTP) Overall Purpose * To begin discussing collaboration across DOD and DOE in keeping with the MOU * To motivate RD&D for APU applications and identify R&D challenges * To identify the next steps and potential collaboration Background Materials Provided * DOD-DOE MOU * NASA/UTC SOFC APU Feasibility Study for Long Range Commercial Aircraft 9:00 am DOE Perspective - Henry Kelly (US DOE Dep. Principal Asst. Sect. of Energy) 9:15 am MOU Overview - Richard Kidd (DOE EERE FEMP)

177

Modeling of a Signal Processing System for Aircraft Air Data  

NLE Websites -- All DOE Office Websites (Extended Search)

Modeling of a Signal Processing System for Aircraft Air Data Modeling of a Signal Processing System for Aircraft Air Data Instrumentation Speaker(s): Thomas John Rohloff Date: September 21, 1998 - 12:00pm Location: 90-3148 Seminar Host/Point of Contact: Joan M. Daisey The velocity, attitude and altitude of flight vehicles have typically been measured with booms that extend from the vehicle surface out into the flow field. However, this arrangement was found to be unacceptable for certain flight applications. Instrumentation was therefore developed by other researchers to measure the flight parameters using an array of pressure measurements located on the surface of the vehicle. The relationship between these pressure measurements and the air data is a complex non-linear function that is not easily described with simple aerodynamic

178

Operation of an aircraft engine using liquefied methane fuel  

SciTech Connect

The operation of a reciprocating aircraft engine on methane fuel is demonstrated. Since storage of the methane fuel in the gaseous state would impractical for a flight fuel system, a liquid storage system was used. System valving was configured to deliver only liquid methane to the engine supply line. The equipment description includes photo and diagram illustrations of the liquid methane storage dewar, and photos of the methane heat exchanger, pressure regulator and air-fuel mixer. The engine test results are presented for gasoline and methane in terms of RPM, horsepower, fuel flow, specific energy consumption and standard conditions horsepower. Conclusions include the finding that conversion of an aircraft reciprocating engine to operate on liquified methane is possible with very satisfactory results.

Raymer, J.A.

1982-01-01T23:59:59.000Z

179

Aircraft Engine Noise Control as Viewed by the Engine Manufacturer  

Science Conference Proceedings (OSTI)

The aircraft engine manufacturer has been continually confronted with the factor of noise control in conjunction with the development and production testing of engines. The scope of this control activity has increased many fold during recent years as the result of the rapid growth in types and size of military power plants. Presented in this paper is a review of the over?all control procedure including typical noise sources

Donald M. Hazard

1953-01-01T23:59:59.000Z

180

Nondestructive inspection of bonded composite doublers for aircraft  

DOE Green Energy (OSTI)

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.

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

1996-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

QSO Narrow [OIII] Line Width and Host Galaxy Luminosity  

E-Print Network (OSTI)

Galaxy bulge luminosity L, black hole mass (Mbh), and stellar velocity dispersion (sigma_*) increase together in a way suggesting a close evolutionary relationship. Measurements of the Mbh-sigma_* relationship as a function of cosmic time may shed light on the origin of this relationship. Direct measurements of sigma_* at high redshift are difficult, and the width of the narrow emission lines of AGN has been proposed as a surrogate. We investigate the utility of using sigma_[OIII] for sigma_* by examining host galaxy magnitudes and [OIII] line widths for low redshift QSOs. For radio-quiet QSOs, sigma_[OIII] is consistent in the mean with the value of sigma_* predicted by the Faber-Jackson relation. For our limited range of host luminosity, scatter obscures the expected increase of sigma_[OIII] with host luminosity. However, for a sample of AGN covering a wide range of measured or inferred sigma_*, there is a clear increase of sigma_[OIII] with sigma_*. Radio-loud QSOs on average have sigma_* smaller by ~0.1 dex than radio-quiet QSOs of similar host luminsotiy, at least for luminosities typical of PG QSOs. Star formation rates in our low redshift QSOs are smaller than required to maintain the typical observed ratio of bulge mass to black hole mass.

E. W. Bonning; G. A. Shields; S. Salviander; R. J. McLure

2005-03-02T23:59:59.000Z

182

Experimental investigations on sodium plugging in narrow flow channels.  

SciTech Connect

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.

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

2010-08-01T23:59:59.000Z

183

Automated safety and training avionics for general aviation aircraft  

E-Print Network (OSTI)

The past decade has seen the U.S. general aviation community plagued by substantial cost increases while operating in an increasingly complex and crowded air traffic control structure. Unfortunately, there has been a corresponding rise in accident rates involving these aircraft. In an attempt to improve safety factors and training programs for this aviation sector, researchers at Texas A&M University are investigating "smart cockpit systems." This research program is titled Automated Safety and Training Avionics (ASTRA). ASTRA research is focused on integrating low-cost, yet sophisticated, computing technology into general aviation aircraft. The system architecture includes a Flight Mode Interpreter (FMI), which provides real-time identification of the aircraft operational maneuvering mode, through interpretation by fuzzy logic of aircraft state variables. This inference controls a Head-Up Display (HUD) to automatically present a unique display format appropriate to the operational situation. The FMI also drives a rule-based Pilot Advisor for generation of alarms and piloting advice. The pilot communicates with ASTRA through the Head-Down Display (HDD), which is configured similarly to the Multi-Function Displays found in many "glass cockpit" aircraft. This configuration permits the pilot to readily access, edit, and display a wide variety of information. The research reported in this thesis was to formally define the performance and test specifications for ASTRA and its various subsystems, as well as to design the system displays. Performance of these research tasks drew heavily on the author's experience as an Army experimental test pilot. Because the FMI is a unique development in modem aeronautics, definition of its functionality and integration with other system components could not rely on existing methodology and called for a imaginative approach. Likewise, design of the HUD and HDD display formats, as integrated with the FMI, was equally challenging. It is hoped that the research contributions of this thesis will form a firm foundation for the implementation and evaluation of the ASTRA system. It is felt that the success of the system will hinge on its functionality and perceived utility from the perspective of the general aviation pilot.

Trang, Jeffrey Alan

1997-01-01T23:59:59.000Z

184

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

DOE Patents (OSTI)

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

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

1999-04-27T23:59:59.000Z

185

Numerical simulation of turbulent airflow, tracer gas diffusion, and particle dispersion in a mockup aircraft cabin.  

E-Print Network (OSTI)

??In order to study the capability of computational methods in investigating the mechanisms associated with disease and contaminants transmission in aircraft cabins, the Computational Fluid (more)

Khosrow, Ebrahimi

2012-01-01T23:59:59.000Z

186

Experimental study of rotordynamic coefficients of squeeze film dampers of an aircraft gas turbine engine.  

E-Print Network (OSTI)

??The rotordynamic coefficients of squeeze film dampers of an aircraft gas turbine engine were investigated experimentally. Rotordynamic model(XLROTOR) for Gas Generator and Power Turbine were (more)

Na, Uhn Joo

2012-01-01T23:59:59.000Z

187

Aircraft Measurements of Icing in Supercooled and Water Droplet/Ice Crystal Clouds  

Science Conference Proceedings (OSTI)

Icing measurements were carried out in Spain during the Precipitation Enhancement Project experiment in 1979, with an instrumented DC-7 aircraft.

M. Bain; J. F. Gayet

1982-05-01T23:59:59.000Z

188

Application of Alloy 718 in GE Aircraft Engines: Past, Present and ...  

Science Conference Proceedings (OSTI)

Robert E. Schafrik, Douglas D. Ward, Jon R. Groh. GE Aircraft Engines. Materials and Process Engineering Department. Cincinnati. Ohio 452 15. ABSTRACT.

189

Modeling And Fouling Detection Of The Aircraft Environmental Control System Heat Exchanger.  

E-Print Network (OSTI)

??A Diagnostics, Prognostics and Health Management (DPHM) solution is proposed for the operation of the aircraft environmental control system (ECS) cross flow heat exchanger. In (more)

Shah, Shoaib A.

2009-01-01T23:59:59.000Z

190

Indentation response of polymer films and aircraft wiring with polymer insulation.  

E-Print Network (OSTI)

??M.S. The airline regulatory communities are interested in methods that can access degradation in the polymer insulation of aging aircraft wiring. This study investigates the (more)

Nagendran, Kaushik Bindiganavile, 1979-

2005-01-01T23:59:59.000Z

191

Phosphorus-31 MRI of hard and soft solids using quadratic echo line-narrowing  

E-Print Network (OSTI)

Phosphorus-31 MRI of hard and soft solids using quadratic echo line-narrowing Merideth A. Freya gradients in sync with this line-narrowing sequence offers a fresh approach to carry out MRI of hard). Extending the reach of MRI to the study of other elements, and to hard or soft solids, opens new frontiers

Haller, Gary L.

192

A CFD/CSD interaction methodology for aircraft wings  

DOE Green Energy (OSTI)

With advanced subsonic transports and military aircraft operating in the transonic regime, it is becoming important to determine the effects of the coupling between aerodynamic loads and elastic forces. Since aeroelastic effects can significantly impact the design of these aircraft, there is a strong need in the aerospace industry to predict these interactions computationally. Such an analysis in the transonic regime requires high fidelity computational fluid dynamics (CFD) analysis tools, due to the nonlinear behavior of the aerodynamics in the transonic regime and also high fidelity computational structural dynamics (CSD) analysis tools. Also, there is a need to be able to use a wide variety of CFD and CSD methods to predict aeroelastic effects. Since source codes are not always available, it is necessary to couple the CFD and CSD codes without alteration of the source codes. In this study, an aeroelastic coupling procedure is developed to determine the static aeroelastic response of aircraft wings using any CFD and CSD code with little code integration. The aeroelastic coupling procedure is demonstrated on an F/A-18 Stabilator using NASTD (an in-house McDonnell Douglas CFD code) and NASTRAN. In addition, the Aeroelastic Research Wing (ARW-2) is used for demonstration of the aeroelastic coupling procedure by using ENSAERO (NASA Ames Research Center CFD code) and a finite element wing-box code. The results obtained from the present study are compared with those available from an experimental study conducted at NASA Langley Research Center and a study conducted at NASA Ames Research Center using ENSAERO and modal superposition. The results compare well with experimental data.

Bhardwaj, M.K.; Kapania, R.K. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States); Reichenbach, E. [Boeing Co., St. Louis, MO (United States); Guruswamy, G.P. [NASA, Moffett Field, CA (United States). Ames Research Center

1998-01-01T23:59:59.000Z

193

Aircraft Integration and Flight Testing of 4STAR  

SciTech Connect

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.

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

2012-10-12T23:59:59.000Z

194

Radiant Energy Power Source for Jet Aircraft. Final performance report  

DOE Green Energy (OSTI)

This report beings with a historical overview on the origin and early beginnings of Radiant Energy Power Source for Jet Aircraft. The report reviews the work done in Phase I (Grant DE-FG01-82CE-15144) and then gives a discussion of Phase II (Grant DE-FG01-86CE-15301). Included is a reasonably detailed discussion of photovoltaic cells and the research and development needed in this area. The report closes with a historical perspective and summary related to situations historically encountered on projects of this nature. 15 refs.

Doellner, O.L.

1992-02-01T23:59:59.000Z

195

A comparison of aircraft trajectory-based and aggregate queue-based control of airport taxi processes  

E-Print Network (OSTI)

There is significant potential to decrease fuel burn, emissions, and delays of aircraft at airports by optimizing surface operations. A simple surface traffic optimization approach is to hold aircraft back at the gates ...

Lee, Hanbong

196

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

E-Print Network (OSTI)

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, ...

Ratliff, Gayle L. (Gayle Lois)

2007-01-01T23:59:59.000Z

197

An Assessment of Aircraft-Generated Contamination on In Situ Trace Gas Measurements: Determinations from Empirical Data Acquired Aloft  

Science Conference Proceedings (OSTI)

Results are reported from an experiment conducted aboard the NASA DC-8 research aircraft to determine whether cabin air vented upstream of investigator's inlets had potentially contaminated ambient air samples obtained aboard the aircraft during ...

S. A. Vay; B. E. Anderson; K. L. Thornhill; C. H. Hudgins

2003-11-01T23:59:59.000Z

198

Low inductance axial flux BLDC motor drive for more electric aircraft  

Science Conference Proceedings (OSTI)

As the aircraft technology is moving towards more electric architecture, use of electric motors in aircraft is increasing.12 Axial-flux BLDC motors are becoming popular in aero application because of their ability to meet the demand of light weight, ...

Sukumar De; Milan Rajne; Srikant Poosapati; Chintan Patel; K. Gopakumar

2011-03-01T23:59:59.000Z

199

Solving the aircraft engine maintenance scheduling problem using a multi-objective evolutionary algorithm  

Science Conference Proceedings (OSTI)

This paper investigates the use of a multi-objective genetic algorithm, MOEA, to solve the scheduling problem for aircraft engine maintenance. The problem is a combination of a modified job shop problem and a flow shop problem. The goal is to minimize ... Keywords: aircraft engine scheduling, multi-objective evolutionary algorithms, scheduling problem, variable-length chromosome

Mark P. Kleeman; Gary B. Lamont

2005-03-01T23:59:59.000Z

200

Heterogeneous reactions in aircraft gas turbine engines R. C. Brown and R. C. Miake-Lye  

E-Print Network (OSTI)

Heterogeneous reactions in aircraft gas turbine engines R. C. Brown and R. C. Miake-Lye Aerodyne to estimate the maximum effect of heterogeneous reactions on trace species evolution in aircraft gas turbines species emissions from gas turbine engines are of interest because of environmental and human health

Waitz, Ian A.

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Development and Implementation of Interactive/Visual Software for Simple Aircraft Gas Turbine Design  

E-Print Network (OSTI)

Development and Implementation of Interactive/Visual Software for Simple Aircraft Gas Turbine of software to analyze and design gas turbine systems has been an important part of this course since 1988 of this project was to develop MS Windows based software: Simple Aircraft Gas Turbine Design, that is easy to use

Ghajar, Afshin J.

202

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

E-Print Network (OSTI)

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 to create an open-air sample path between them, approximately 20 feet in #12;Remote Sensing of Commercial

Denver, University of

203

Application of TOPSIS in evaluating initial training aircraft under a fuzzy environment  

Science Conference Proceedings (OSTI)

This paper develops an evaluation approach based on the Technique for Order Performance by Similarity to Ideal Solution (TOPSIS), to help the Air Force Academy in Taiwan choose optimal initial training aircraft in a fuzzy environment where the vagueness ... Keywords: Fuzzy sets theory, Initial training aircraft, Multiple criteria decision-making (MCMD), TOPSIS

Tien-Chin Wang; Tsung-Han Chang

2007-11-01T23:59:59.000Z

204

Pitch rate damping of an aircraft by fuzzy and classical PD controller  

Science Conference Proceedings (OSTI)

Aircraft dynamics are in general nonlinear, time varying, and uncertain. A control system (classical control systems) designed for a flight condition, may not provide the desired stability and performance characteristics in case of deviation from the ... Keywords: aircraft, classical PD control, flight control, fuzzy and fuzzy PD control, pitch rate

Yasemin Isik

2010-07-01T23:59:59.000Z

205

A new research aircraft for the documentation of the impacts of pollution  

NLE Websites -- All DOE Office Websites (Extended Search)

A new research aircraft for the documentation of the impacts of pollution A new research aircraft for the documentation of the impacts of pollution aerosols on clouds and precipitation Axisa, Duncan SOAR Collins, Don Texas A&M University Rosenfeld, Daniel Woodley, William Category: Radiation The importance of aircraft in situ measurements is well demonstrated by the progress that these data helped to achieve over the last two decades. Advances were quite spectacular over this period both in aircraft capabilities and in the instrumentation carried by them. Through the years new aircraft probe designs have evolved. These improvements provide an extended and overlapping size range of cloud particles and accumulation mode aerosol measurements. Improved electronics provide better resolution, particle sizing and accurate particle concentrations. Seeding Operations &

206

Atmospheric CO2 Concentrations from Aircraft for 1972-1981, CSIRO  

NLE Websites -- All DOE Office Websites (Extended Search)

Atmospheric Trace Gases » CO2 » Concentrations from Aircraft for Atmospheric Trace Gases » CO2 » Concentrations from Aircraft for 1972-1981 Atmospheric CO2 Concentrations from Aircraft for 1972-1981, CSIRO Monitoring Program DOI: 10.3334/CDIAC/atg.ndp007 data Data (NDP-007) PDF PDF Investigators D. J. Beardsmore and G. I. Pearman Methods From 1972 through 1981, air samples were collected in glass flasks from aircraft at a variety of latitudes and altitudes over Australia, New Zealand, and Antarctica. The samples were analyzed for CO2 concentrations with nondispersive infrared gas analysis. The resulting data contain the sampling dates, type of aircraft, flight number, flask identification number, sampling time, geographic sector, distance in kilometers from the listed distance measuring equipment (DME) station, station number of the

207

Role of Narrow Mountains in Large-Scale Organization of Asian Monsoon Convection  

Science Conference Proceedings (OSTI)

The Asian summer monsoon is organized into distinct convection centers, but the mechanism for this organization is not well understood. Analysis of new satellite observations reveals that narrow mountain ranges are an important organizing agent ...

Shang-Ping Xie; Haiming Xu; N. H. Saji; Yuqing Wang; W. Timothy Liu

2006-07-01T23:59:59.000Z

208

Comparison of Narrow Bipolar Events with Ordinary Lightning as Proxies for Severe Convection  

Science Conference Proceedings (OSTI)

Narrow bipolar events (NBEs) are a recently studied intracloud electrical-discharge process. It is speculated that an NBE is instigated by the extensive atmospheric shower of an energetic cosmic ray. NBEs cause significant relaxation of the ...

Abram R. Jacobson; Mathew J. Heavner

2005-05-01T23:59:59.000Z

209

What Fraction of a Kelvin Wave Incident on a Narrow Strait Is Transmitted?  

Science Conference Proceedings (OSTI)

Parameters governing the fraction of a Kelvin wave transmitted through a narrow gap or channel include time dependence, nonlinearity, friction, and strait geometry, yet only limited regions of this parameter space have been explored. Linear ...

Helen L. Johnson; Chris Garrett

2006-05-01T23:59:59.000Z

210

Residual Currents Induced by Asymmetric Tidal Mixing in Weakly Stratified Narrow Estuaries  

Science Conference Proceedings (OSTI)

Residual currents induced by asymmetric tidal mixing were examined for weakly stratified, narrow estuaries using analytical and numerical models. The analytical model is an extension of the work of R. K. McCarthy, with the addition of tidal ...

Peng Cheng; Arnoldo Valle-Levinson; Huib E. de Swart

2010-09-01T23:59:59.000Z

211

Very Narrow Band Model Calculations of Atmospheric Fluxes and Cooling Rates  

Science Conference Proceedings (OSTI)

A new very narrow band model (VNBM) approach has been developed and incorporated into the MODTRAN atmospheric transmittanceradiance code. The VNBM includes a computational spectral resolution of 1 cm?1, a single-line Voigt equivalent width ...

L. S. Bernstein; A. Berk; P. K. Acharya; D. C. Robertson; G. P. Anderson; J. H. Chetwynd; L. M. Kimball

1996-10-01T23:59:59.000Z

212

Trimers in the resonant (2+1)-fermion problem on a narrow Feshbach resonance: Crossover from Efimovian to hydrogenoid spectrum  

Science Conference Proceedings (OSTI)

We study the quantum three-body free-space problem of two same-spin-state fermions of mass m interacting with a different particle of mass M, on an infinitely narrow Feshbach resonance with infinite s-wave scattering length. This problem is made interesting by the existence of a tunable parameter, the mass ratio {alpha}=m/M. By a combination of analytical and numerical techniques, we obtain a detailed picture of the spectrum of three-body bound states, within each sector of fixed total angular momentum l. For {alpha} increasing from 0, we find that the trimer states first appear at the l-dependent Efimovian threshold {alpha}{sub c}{sup (l)}, where the Efimov exponent s vanishes, and that the entire trimer spectrum (starting from the ground trimer state) is geometric for {alpha} tending to {alpha}{sub c}{sup (l)} from above, with a global energy scale that has a finite and nonzero limit. For further increasing values of {alpha}, the least bound trimer states still form a geometric spectrum, with an energy ratio exp(2{pi}/|s|) that becomes closer and closer to unity, but the most bound trimer states deviate more and more from that geometric spectrum and eventually form a hydrogenoid spectrum.

Castin, Yvan; Tignone, Edoardo [Laboratoire Kastler Brossel, Ecole Normale Superieure and CNRS, UPMC, 24 rue Lhomond, F-75231 Paris (France)

2011-12-15T23:59:59.000Z

213

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

Science Conference Proceedings (OSTI)

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.

Roach, Dennis Patrick; Rackow, Kirk A.

2007-07-01T23:59:59.000Z

214

A Comprehensive Program for Measurement of Military Aircraft Emissions  

DOE Green Energy (OSTI)

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.

Cheng, Mengdawn [ORNL

2009-11-01T23:59:59.000Z

215

Personal Body Armor Testing  

Science Conference Proceedings (OSTI)

Directory of Accredited Laboratories. Personal Body Armor Testing. In 2006, the US Department of Justice (DOJ) National ...

2014-01-03T23:59:59.000Z

216

Body of work  

SciTech Connect

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

Carter, R.A.

2008-06-15T23:59:59.000Z

217

Fuel Cell Technologies Office: DOD-DOE Aircraft Petroleum Use Reduction  

NLE Websites -- All DOE Office Websites (Extended Search)

DOD-DOE Aircraft Petroleum Use Reduction Workshop DOD-DOE Aircraft Petroleum Use Reduction Workshop The U.S. Department of Energy's (DOE) Fuel Cell Technologies Office and the U.S. Department of Defense (DOD) held a workshop on September 30, 2010, in Washington, DC, to discuss the potential for fuel cells to reduce aircraft petroleum use. Workshop objectives were to discuss collaboration across DOD and DOE in keeping with the DOD-DOE Memorandum of Understanding (MOU), to motivate RD&D for auxiliary power unit (APU) applications and identify R&D challenges, and to identify next steps and potential collaboration opportunities. Workshop Agenda Aircraft Petroleum Use Reduction Workshop Agenda Workshop Proceedings Report of the DOD-DOE Workshop on Fuel Cells in Aviation: Workshop Summary and Action Plan

218

Aircraft Particle Inlets: State-of-the-Art and Future Needs  

Science Conference Proceedings (OSTI)

Aircraft inlets connect airborne instruments for particle microphysical and chemical measurements with the ambient atmosphere. These inlets may bias the measurements due to their potential to enhance or remove certain particle size fractions in ...

M. Wendisch; H. Coe; D. Baumgardner; J-L. Brenguier; V. Dreiling; M. Fiebig; P. Formenti; M. Hermann; M. Krmer; Z. Levin; R. Maser; E. Mathieu; P. Nacass; K. Noone; S. Osborne; J. Schneider; L. Schtz; A. Schwarzenbck; F. Stratmann; J. C. Wilson

2004-01-01T23:59:59.000Z

219

The Selection and Use of Dropwindsonde-Equipped Aircraft for Operational Forecasting Applications  

Science Conference Proceedings (OSTI)

This article discusses the feasibility of using dropwindsonde-equipped aircraft to obtain meteorological observations over oceanic data- void areas for operational forecasting applications. Such in-situ meteorological observations would provide ...

Michael W. Douglas

1990-12-01T23:59:59.000Z

220

The Use of Pressure Fluctuations on the Nose of an Aircraft for Measuring Air Motion  

Science Conference Proceedings (OSTI)

An air-motion sensing technique is described for measurement of attack and sideslip angles and dynamicpressure. The sensing probe consists of an array of five pressure holes in the standard radome of a twin-jetresearch aircraft. Comparisons are ...

E. N. Brown; C. A. Friehe; D. H. Lenschow

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Jet Stream Winds: Comparisons of Analyses with Independent Aircraft Data over Southwest Asia  

Science Conference Proceedings (OSTI)

We have obtained cruise-level wind data from commercial aircraft, and compared this data with operational jet stream analyses over southwest Asia, an area of limited conventional data. We present results from an ensemble of 11 cases during ...

J. Tenenbaum

1991-09-01T23:59:59.000Z

222

Air Flow and Particle Trajectories around Aircraft Fuselages. Part III: Extensions to Particles of Arbitrary Shape  

Science Conference Proceedings (OSTI)

Earlier work that produced generalized rules for obtaining trajectories of water droplets moving around aircraft fuselages has been extended to cover the case for particles of arbitrary shape. The parameters determining the major features of the ...

W. D. King

1985-12-01T23:59:59.000Z

223

Thunderstorm Top Structure Observed by Aircraft Overflights with an Infrared Radiometer  

Science Conference Proceedings (OSTI)

Thunderstorm top structure is examined with high spatial resolution radiometric data (visible and infrared) from aircraft overflights together with other storm views, including geosynchronous satellite observations. Results show that overshooting ...

Robert F. Adler; Michael J. Markus; Douglas D. Fenn; Gerard Szejwach; William E. Shenk

1983-04-01T23:59:59.000Z

224

Inference of Cloud Optical Depth from Aircraft-Based Solar Radiometric Measurements  

Science Conference Proceedings (OSTI)

A method is introduced for inferring cloud optical depth ? from solar radiometric measurements made on an aircraft at altitude z. It is assessed using simulated radiometric measurements produced by a 3D Monte Carlo algorithm acting on fields of ...

H. W. Barker; A. Marshak; W. Szyrmer; J-P. Blanchet; A. Trishchenko; Z. Li

2002-07-01T23:59:59.000Z

225

Retrieving Storm Electric Fields from Aircraft Field Mill Data. Part I: Theory  

Science Conference Proceedings (OSTI)

It is shown that the problem of retrieving storm electric fields from an aircraft instrumented with several electric field mill sensors can be expressed in terms of a standard Lagrange multiplier optimization problem. The method naturally removes ...

W. J. Koshak

2006-10-01T23:59:59.000Z

226

Retrieving Storm Electric Fields from Aircraft Field Mill Data. Part II: Applications  

Science Conference Proceedings (OSTI)

The Lagrange multiplier theory developed in Part I of this study is applied to complete a relative calibration of a Citation aircraft that is instrumented with six field mill sensors. When side constraints related to average fields are used, the ...

W. J. Koshak; D. M. Mach; H. J. Christian; M. F. Stewart; M. G. Bateman

2006-10-01T23:59:59.000Z

227

Objective Analysis of Constant Altitude Aircraft Measurements in Thunderstorm Inflow Regions  

Science Conference Proceedings (OSTI)

Objective numerical techniques are applied in analyzing constant altitude aircraft measurements obtained from coordinated research flights in thunderstorm inflow regions. The approach combines meteorological and flight track data from dual or ...

J. C. Fankhauser; C. J. Biter; C. G. Mohr; R. L. Vaughan

1985-06-01T23:59:59.000Z

228

Further Observations of the Production of Ice Particles in Clouds by Aircraft  

Science Conference Proceedings (OSTI)

Evidence is presented for the production of high concentrations of rather uniformly-sized ice crystals in a supercooled stratus cloud by a commercial, turbine, propeller-driven aircraft.

Arthur L. Rangno; Peter V. Hobbs

1984-06-01T23:59:59.000Z

229

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

E-Print Network (OSTI)

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 ...

Hynes, Christopher Dennis

2005-01-01T23:59:59.000Z

230

Eddy Dissipation Rates in Thunderstorms Estimated by Doppler Radar in Relation to Aircraft In Situ Measurements  

Science Conference Proceedings (OSTI)

High-resolution aircraft turbulence measurements, well coordinated with radar Doppler spectral width measurements, have been used to verify radar-estimated energy dissipation rates within thunderstorms anvils. The radar-estimated eddy dissipation ...

Peter Meischner; Robert Baumann; Hartmut Hller; Thomas Jank

2001-10-01T23:59:59.000Z

231

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

E-Print Network (OSTI)

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 ...

Faulkner, Henry B.

1976-01-01T23:59:59.000Z

232

A Comparison of Vertical Velocity in Cirrus Obtained from Aircraft and Lidar Divergence Measurements during FIRE  

Science Conference Proceedings (OSTI)

Techniques are presented to obtain vertical velocity in cirrus clouds from in situ aircraft lateral wind measurements and from ground-based remote Doppler lidar measurements. In general, direct measurements of absolute vertical velocity w from ...

I. Gultepe; A. J. Heymsfield; D. H. Lenschow

1990-02-01T23:59:59.000Z

233

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

E-Print Network (OSTI)

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 ...

Horrell, Alexander C. (Alexander Chapman)

2012-01-01T23:59:59.000Z

234

Calibration and Quality Assurance of Flux Observations from a Small Research Aircraft  

Science Conference Proceedings (OSTI)

Small environmental research aircraft (ERA) are becoming more common for detailed studies of airsurface interactions. The Sky Arrow 650 ERA, used by multiple groups, is designed to minimize the complexity of high-precision airborne turbulent wind ...

Olaf S. Vellinga; Ronald J. Dobosy; Edward J. Dumas; Beniamino Gioli; Jan A. Elbers; Ronald W. A. Hutjes

2013-02-01T23:59:59.000Z

235

Comparisons of Aircraft and Tower Measurements around Tarama Island during the AMTEX 75  

Science Conference Proceedings (OSTI)

During the field observation period of the Air Mass Transformation Experiment in 1975 (AMTEX 75), one of the boundary-layer research flights of the National Center for Atmospheric Research (NCAR) Electra aircraft was conducted in the vicinity of ...

Yasushi Mitsuta; Nobutaka Monji; Donald H. Lenschow

1986-12-01T23:59:59.000Z

236

Microphysical Measurements from an Aircraft Ascending with a Growing Isolated Maritime Cumulus Tower  

Science Conference Proceedings (OSTI)

The development of precipitation in the top of an isolated maritime cumulus tower is traced by four rapid penetrations with an instrumented aircraft between 400 and 1000 m below the visible top of the growing tower. The hydrometeor distribution ...

Paul T. Willis; John Hallett

1991-01-01T23:59:59.000Z

237

Quality Control and Flux Sampling Problems for Tower and Aircraft Data  

Science Conference Proceedings (OSTI)

A series of automated tests is developed for tower and aircraft time series to identify instrumentation problems, flux sampling problems, and physically plausible but unusual situations. The automated procedures serve as a safety net for quality ...

Dean Vickers; L. Mahrt

1997-06-01T23:59:59.000Z

238

Coincident Lidar and Aircraft Observations of Entrainment into Thermals and Mixed Layers  

Science Conference Proceedings (OSTI)

Coincident observations of the daytime convective boundary layer over Oklahoma were made with the NCAR Queen Air aircraft and the University of Wisconsin ground-based lidar. The two data sets have been merged to provide a unique visual ...

Timothy D. Crum; Roland B. Stull; Edwin W. Eloranta

1987-07-01T23:59:59.000Z

239

Effects of Airflow Trajectories Around Aircraft on Measurements of Scalar Fluxes  

Science Conference Proceedings (OSTI)

Potential-flow calculations of the airflow around two research aircraft are used to estimate the effect of flow distortion on measured fluxes of sensible heat and water vapor. From the calculated flow patterns, flow-distortion coefficients are ...

William A. Cooper; Diana Rogers

1991-02-01T23:59:59.000Z

240

The Structure of the Unstable Marine Boundary Layer Viewed by Lidar and Aircraft Observations  

Science Conference Proceedings (OSTI)

The combination of vertical lidar and in situ meteorological observations from two aircraft provide an unprecedented view of the marine atmospheric boundary layer (MABL) during a cold air outbreak. To a first approximation, the lidar reflectivity ...

David Atlas; Bernard Walter; Shu-Hsien Chou; P. J. Sheu

1986-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

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

Science Conference Proceedings (OSTI)

Documentation during January and February 2000 of the structure of severe convective storms in Mendoza, Argentina, with a cloud-physics jet aircraft penetrating the major feeder clouds from cloud base to the ?45C isotherm level is reported. ...

Daniel Rosenfeld; William L. Woodley; Terrence W. Krauss; Viktor Makitov

2006-09-01T23:59:59.000Z

242

Influence of Synoptic Track Aircraft Reconnaissance on JTWC Tropical Cyclone Track Forecast Errors  

Science Conference Proceedings (OSTI)

This report examines the impact of synoptic reconnaissance by United States Air Force aircraft on the accuracy of tropical cyclone motion forecasts. Synoptic reconnaissance missions were requested for the purpose of collecting data on atmospheric ...

Daniel N. Shoemaker; William M. Gray; John D. Sheaffer

1990-09-01T23:59:59.000Z

243

Typhoon Structure as Revealed by Aircraft Reconnaissance. Part I: Data Analysis and Climatology  

Science Conference Proceedings (OSTI)

This is the first of two papers describing the structure of northwest Pacific tropical cyclones as revealed by U.S. Air Force aircraft reconnaissance. This first paper describes the background philosophy for this research, the types of flight ...

Candis L. Weatherford; William M. Gray

1988-05-01T23:59:59.000Z

244

A solution to the inherent list on Nimitz class aircraft carriers  

E-Print Network (OSTI)

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 ...

Wolfson, Dianna

2004-01-01T23:59:59.000Z

245

Aircraft Icing Environment in Low Ceiling Conditions near Washington, D.C.  

Science Conference Proceedings (OSTI)

Radiosonde temperature and humidity data were used to deduce the vertical distribution of clouds and aircraft icing conditions near Washington, D.C. when low ceilings occurred with surface temperatures near freezing. Twenty-three soundings from ...

Nathaniel B. Guttman; Richard K. Jeck

1987-06-01T23:59:59.000Z

246

SCOUT-O3/ACTIVE: High-altitude Aircraft Measurements around Deep Tropical Convection  

Science Conference Proceedings (OSTI)

During November and December 2005, two consortia of mainly European groups conducted an aircraft campaign in Darwin, Australia, to measure the composition of the tropical upper-troposphere and tropopause regions, between 12 and 20 km, in order to ...

G. Vaughan; K. Bower; C. Schiller; A. R. MacKenzie; T. Peter; H. Schlager; N. R. P. Harris; P. T. May

2008-05-01T23:59:59.000Z

247

Comparison of Cirrus Height and Optical Depth Derived from Satellite and Aircraft Measurements  

Science Conference Proceedings (OSTI)

During the International Cirrus Experiment (ICE'89) simultaneous measurements of Cirrus cloud-top height and optical depth by satellite and aircraft have been taken. Data from the Advanced Very High Resolution Radiometer (AVHRR) onboard the NOAA ...

M. Kstner; K. T. Kriebel; R. Meerktter; W. Renger; G. H. Ruppersberg; P. Wendling

1993-10-01T23:59:59.000Z

248

A Climatology of Atmospheric Wavenumber Spectra of Wind and Temperature Observed by Commercial Aircraft  

Science Conference Proceedings (OSTI)

Atmospheric wavenumber spectra of wind and temperature have been obtained from over 6000 commercial aircraft flights made during the Global Atmospheric Sampling Program. Temperature and velocity spectra are approximately the same shape over the ...

G. D. Nastrom; K. S. Gage

1985-05-01T23:59:59.000Z

249

Influence of Shallow Cumuli on Subcloud Turbulence Fluxes Analyzed from Aircraft Data  

Science Conference Proceedings (OSTI)

The purpose of this study is to improve understanding of shallow cumuli in the planetary boundary layer (PBL) by quantitatively analysing subcloud turbulence variables. Aircraft turbulence data for three flights from the 1986 Hydrologic...

Zekai Otles; John A. Young

1996-03-01T23:59:59.000Z

250

Analysis of Precipitation Augmentation Potential in Winter Orographic Clouds by Use of Aircraft Icing Reports  

Science Conference Proceedings (OSTI)

Aircraft icing reports from northern Utah and southeastern Idaho along with radiosonde and precipitation data for six winter seasons are utilized in an analysis of precipitation augmentation potential in winter orographic clouds. According to ...

Geoffrey E. Hill

1982-02-01T23:59:59.000Z

251

Correction of Inertial Navigation with Loran C on NOAA's P-3 Aircraft  

Science Conference Proceedings (OSTI)

The National Oceanic and Atmospheric Administration (NOAA) maintains two Orion WP-3D aircraft based in Miami, Florida, and used for atmospheric and oceanographic research in support of NOAA projects and missions.

Jeffrey M. Masters; James A. Leise

1993-04-01T23:59:59.000Z

252

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

E-Print Network (OSTI)

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 ...

Ho, Nhut Tan, 1974-

2005-01-01T23:59:59.000Z

253

A Study of Thunderstorm Microphysics with Multiparameter Radar and Aircraft Observations  

Science Conference Proceedings (OSTI)

Excellent agreement was found between multiparameter radar signatures of hail, raindrops, and mixed-phase precipitation and in situ precipitation particle measurements made by aircraft in a northeastern Colorado hail-storm. Radar reflectivity ...

E. A. Brandes; J. Vivekanandan; J. D. Tuttle; C. J. Kessinger

1995-11-01T23:59:59.000Z

254

Specifics of aircraft control algorithms in the case of aerial survey  

Science Conference Proceedings (OSTI)

This paper considers the control problem for a piloted atmospheric aircraft during execution of different flight missions. The basic control schemes are identified in the case of aerial survey. Modern control systems are compared and analyzed. A software ...

E. V. Karshakov

2013-12-01T23:59:59.000Z

255

Application of the calculus of variations in determining optimum flight profiles for commercial short haul aircraft  

E-Print Network (OSTI)

The method of steepest descent of the calculus of variations is used to determine the optimal flight profile of a hypothetical tilt wing aircraft travelling a distance of 50 miles. Direct operating cost, (as derived from ...

Gallant, Robert Alfred

1966-01-01T23:59:59.000Z

256

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

E-Print Network (OSTI)

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 ...

Kaina, Leighton

2006-01-01T23:59:59.000Z

257

Optimal Geometric Trimming of B-spline Surfaces for Aircraft Design.  

E-Print Network (OSTI)

??B-spline surfaces have been widely used in aircraft design to represent different types of components in a uniform format. Unlike the visual trimming of B-spline (more)

Zhang, Xinyu

2005-01-01T23:59:59.000Z

258

Aircraft Multifrequency Passive Microwave Observations of Light Precipitation over the Ocean  

Science Conference Proceedings (OSTI)

Aircraft passive microwave observations at 18, 37, 92, and 183 GHz of light oceanic precipitation are studied in conjunction with visible and infrared observations and ground-based radar data. Microwave signatures for clear, cloudy, and ...

Robert F. Adler; Ida M. Hakkarinen

1991-04-01T23:59:59.000Z

259

Assessment of Aircraft Icing Potential and Maximum Icing Altitude from Geostationary Meteorological Satellite Data  

Science Conference Proceedings (OSTI)

A satellite product that displays regions of aircraft icing potential, along with corresponding cloud-top heights, has been developed using data from the Geostationary Operational Environmental Satellite (GOES) imager and sounder. The icing ...

Gary P. Ellrod; Andrew A. Bailey

2007-02-01T23:59:59.000Z

260

Relationships between Total Water, Condensed Water, and Cloud Fraction in Stratiform Clouds Examined Using Aircraft Data  

Science Conference Proceedings (OSTI)

Relationships among total water, condensed water, and cloud fraction in boundary layer and cold tropospheric stratiform clouds are investigated using a large observational dataset collected by the U.K. Met. Office C-130 aircraft. Values of the ...

Robert Wood; Paul R. Field

2000-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Radially Classified Aerosol Detector for Aircraft-Based Submicron Aerosol Measurements  

Science Conference Proceedings (OSTI)

A radially classified aerosol detector (RCAD) for fast characterization of fine particle size distributions aboard aircraft has been designed and implemented. The measurement system includes a radial differential mobility analyzer and a high-flow,...

Lynn M. Russell; Shou-Hua Zhang; Richard C. Flagan; John H. Seinfeld; Mark R. Stolzenburg; Robert Caldow

1996-06-01T23:59:59.000Z

262

Aircraft-Induced Hole Punch and Canal Clouds: Inadvertent Cloud Seeding  

Science Conference Proceedings (OSTI)

The production of holes and channels in altocumulus clouds by two commercial turboprop aircraft is documented for the first time. An unprecedented dataset combining in situ measurements from microphysical probes with remote sensing measurements ...

Andrew J. Heymsfield; Patrick C. Kennedy; Steve Massie; Carl Schmitt; Zhien Wang; Samuel Haimov; Art Rangno

2010-06-01T23:59:59.000Z

263

An Intercomparison of Mesoscale Forecasts of Aircraft Icing Using SSM/I Retrievals  

Science Conference Proceedings (OSTI)

A technique for the detection of supercooled liquid water (SLW) from Special Sensor Microwave/ (SSM/I) data is discussed. For this study, these SLW retrievals depict areas of icing that are used to compare against different aircraft icing ...

Andr Tremblay; Stewart G. Cober; Anna Glazer; George Isaac; Jocelyn Mailhot

1996-03-01T23:59:59.000Z

264

Structure of Florida Thunderstorms Using High-Altitude Aircraft Radiometer and Radar Observations  

Science Conference Proceedings (OSTI)

This paper presents an analysis of a unique radar and radiometer dataset from the National Aeronautics and Space Administration (NASA) ER-2 high-altitude aircraft overlying Florida thunderstorms on 5 October 1993 during the Convection and ...

G. M. Heymsfield; J. M. Shepherd; S. W. Bidwell; W. C. Boncyk; I. J. Caylor; S. Ameen; W. S. Olson

1996-10-01T23:59:59.000Z

265

Lower Tropospheric Ozone Measurements by Light Aircraft Equipped with Chemiluminescent Sonde  

Science Conference Proceedings (OSTI)

Novel use of a commercial, battery-powered, chemiluminescent ozonesonde on a light aircraft is described. This fast-response instrument, originally designed for balloon deployment into the stratosphere, is light, inexpensive, robust (reuseable), ...

I. G. McKendry; D. G. Steyn; S. OKane; P. Zawar-Reza; D. Heuff

1998-02-01T23:59:59.000Z

266

Real-Time Airborne Analysis of Aircraft Data Supporting Operational Hurricane Forecasting  

Science Conference Proceedings (OSTI)

The Hurricane Research Division has developed a technique for real-time airborne analysis of aircraft data from reconnaissance and research flights in tropical cyclones. The technique uses an onboard workstation that analyzes flight-level ...

Joseph S. Griffin; Robert W. Burpee; Frank D. Marks Jr.; James L. Franklin

1992-09-01T23:59:59.000Z

267

Spruce Budworm Moth Flight and Storms, Further Studies Using Aircraft and Radar  

Science Conference Proceedings (OSTI)

In two further detailed case studies using special insect-detecting radars and aircraft, the height, density, speed and extent of displacement of night-flying spruce budworm months (Choristoneura fumiferana [Clem.]) were found to be substantially ...

R. B. B. Dickison; Margaret J. Haggis; R. C. Rainey; L. M. D. Burns

1986-11-01T23:59:59.000Z

268

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

E-Print Network (OSTI)

(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 ...

Diedrich, Adam John, 1980-

2005-01-01T23:59:59.000Z

269

Precipitation Characteristics of Trade Wind Clouds during RICO Derived from Radar, Satellite, and Aircraft Measurements  

Science Conference Proceedings (OSTI)

Precipitation characteristics of trade wind clouds over the Atlantic Ocean near Barbuda are derived from radar and aircraft data and are compared with satellite-observed cloud fields collected during the Rain in Cumulus over the Ocean (RICO) ...

Eric R. Snodgrass; Larry Di Girolamo; Robert M. Rauber

2009-03-01T23:59:59.000Z

270

Vertical Diffusion in the Lower Atmosphere Using Aircraft Measurements of 222Rn  

Science Conference Proceedings (OSTI)

Vertical profiles of 222Rn concentrations measured from 3 to 6 September 1995 in the northeastern United States, using a new radon instrument designed for aircraft measurements, are presented. A vertical diffusion model was employed to simulate ...

H. N. Lee; R. J. Larsen

1997-09-01T23:59:59.000Z

271

A Test of Ice Self-Collection Kernels Using Aircraft Data  

Science Conference Proceedings (OSTI)

Aircraft observations from the Cirrus Regional Study of Tropical Anvils and Cirrus Layers (CRYSTAL)Florida Area Cirrus Experiment (FACE) campaign obtained in the anvil of a large convective storm from 26 July 2002 are presented. During this ...

P. R. Field; A. J. Heymsfield; A. Bansemer

2006-02-01T23:59:59.000Z

272

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

E-Print Network (OSTI)

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 ...

Martini, Bastien

2008-01-01T23:59:59.000Z

273

A physics-based emissions model for aircraft gas turbine combustors  

E-Print Network (OSTI)

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 ...

Allaire, Douglas L

2006-01-01T23:59:59.000Z

274

Aircraft Observation of Convection Waves over Southern GermanyA Case Study  

Science Conference Proceedings (OSTI)

A vertical cross section of 100 km 10 km through a daytime midlatitude troposphere is analyzed using aircraft turbulence data with 1.5-m spatial resolution. Convectively forced internal gravity waves, also referred to as convection waves, ...

Thomas Hauf

1993-12-01T23:59:59.000Z

275

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

E-Print Network (OSTI)

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 ...

Wulz, Alexander Andrew

2012-01-01T23:59:59.000Z

276

A review and practical guide to in-flight calibration for aircraft turbulence sensors  

Science Conference Proceedings (OSTI)

A large number of quantities have to be measured and processed to determine the atmospheric state variables, which are the actual measurands, from aircraft-based measurements. A great part of the dependencies between theses quantities depends on ...

Clemens Dre; Gnther Heinemann

277

Island Barrier Effects as Observed by Satellite and Instrumented Aircraft, and Simulated by a Numerical Model  

Science Conference Proceedings (OSTI)

Examples of island barrier effects appearing in visual and infrared Defense Meteorological Satellite Program (DMSP) data are shown and documented with selected conventional and research aircraft data. Effects discussed include lee and corner, ...

Robert W. Fett; Stephen D. Bury

1981-07-01T23:59:59.000Z

278

Two Automated Ozone Analyzers for Use on Civil Aircraft Operating in the Tropopause Region  

Science Conference Proceedings (OSTI)

Within the CARIBIC (Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container) project, deployment of an automated container with analytical equipment for the observation of atmospheric trace gases and aerosols ...

Hans Gsten; Gnther Heinrich; Erbo Mnnich; Michael Nolle; Josef Weppner

2003-02-01T23:59:59.000Z

279

Microphysical modeling of ultrane hydrocarbon-containing aerosols in aircraft emissions  

E-Print Network (OSTI)

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, ...

Jun, Mina

2011-01-01T23:59:59.000Z

280

Size Distributions and Dynamical Properties of Shallow Cumulus Clouds from Aircraft Observations and Satellite Data  

Science Conference Proceedings (OSTI)

In this paper aircraft observations of shallow cumulus over Florida during the Small Cumulus Microphysics Study (SCMS) are analyzed. Size distributions of cloud fraction, mass flux, and in-cloud buoyancy flux are derived. These distributions ...

Stefaan M. A. Rodts; Peter G. Duynkerke; Harm J. J. Jonker

2003-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Improving RUC-1 Wind Estimates by Incorporating Near-Real-Time Aircraft Reports  

Science Conference Proceedings (OSTI)

A verification study of wind accuracy is presented for wind nowcasts generated by augmenting Rapid Update Cycle (RUC) wind forecasts with near-real-time aircraft reports using the Integrated Terminal Weather System (ITWS) gridded winds algorithm. ...

Rodney E. Cole; Steve M. Green; Matt R. Jardin

2000-08-01T23:59:59.000Z

282

RF Loading Effects of Aircraft Seats in an Electromagnetic Reverberating Environment  

Science Conference Proceedings (OSTI)

Loading effects of aircraft seats in an electromagnetic reverberating environment are investigated. The effects are determined by comparing the reverberation chamber''s insertion losses with and without the seats. The average per-seat absorption cross-sections ...

Nguyen Truong X.

2000-12-01T23:59:59.000Z

283

Modeling and sensitivity analysis of aircraft geometry for multidisciplinary optimization problems  

E-Print Network (OSTI)

A new geometry management paradigm for aircraft design utilizes Computer Aided Design (CAD) systems as the source for consistent geometry models across design phases and analysis tools. Yet various challenges inhibit the ...

Lazzara, David S. (David Sergio), 1980-

2012-01-01T23:59:59.000Z

284

Strategies for Circulation Evaluation of Aircraft Wake Vortices Measured by Lidar  

Science Conference Proceedings (OSTI)

An assessment of different methods for circulation evaluation from lidar measurement data of aircraft wake vortices is performed. The surface integral of vorticity serves as baseline case that is compared to a method that evaluates the lidar line-...

Frank Holzpfel; Thomas Gerz; Friedrich Kpp; Eike Stumpf; Michael Harris; Robert I. Young; Agns Dolfi-Bouteyre

2003-08-01T23:59:59.000Z

285

The Relationship between Aircraft Icing and Synoptic-Scale Weather Conditions  

Science Conference Proceedings (OSTI)

More than 2700 aircraft icing pilot reports are compared to analyses of operationally available data for 37 cases of winter weather. Statistical results regarding the number of occurrences of icing reports with airmass origin, location relative ...

Ben C. Bernstein; Tiffany A. Omeron; Frank McDonough; Marcia K. Politovich

1997-12-01T23:59:59.000Z

286

Intelligent weather agent for aircraft severe weather avoidance  

E-Print Network (OSTI)

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 avoidance capability has increased. In this thesis, an intelligent weather agent is developed for general aviation aircraft. Using a radar image from an onboard weather radar, the intelligent weather agent determines the safest path around severe weather with a minimum detour in distance. The method used is the Simplified Memory Bounded A* search technique that reduces computation time and memory requirements. The algorithm for A* search using the heuristic function is initially developed and evaluated in non-real-time form using Matlab, and demonstrated to be reliable and fast in flight path re-routing for stationary thunderstorms as well as moving thunderstorms. It is extended into a real-time version coded in Borland C++, and integrated with the existing Simplified Flight Management System and coupled with the heading command and hold autopilot of the nonlinear, non-real-time, six degrees-of-freedom Engineering Flight Simulator. Test cases consisting of stationary and moving thunderstorms are used to evaluate the intelligent weather agent online, in real-time. Results demonstrate that the new path suggested by the algorithm developed in this thesis is about 1% to 25% longer than the original path depending upon the size of the thunderstorm that lies in the original path. The detours in the test cases ranged from about 1 mile to 11 miles over and above the original path length. The algorithm did not exhibit any critical failures in the test cases and proved to be robust. The intelligent weather agent, when integrated with the Simplified Flight Management System and coupled with the heading command and hold autopilot, provides an effective and reliable guidance and navigation system for generating safe, alternate flight paths around thunderstorms and squall lines. It also forms the basis for the severe weather agent component of a broader hierarchical intelligent agent based system for free-flight guidance.

Bokadia, Sangeeta

2002-01-01T23:59:59.000Z

287

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

SciTech Connect

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.

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

288

Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms  

E-Print Network (OSTI)

Laser cooling on weak transitions is a useful technique for reaching ultracold temperatures in atoms with multiple valence electrons. However, for strongly magnetic atoms a conventional narrow-line magneto-optical trap (MOT) is destabilized by competition between optical and magnetic forces. We overcome this difficulty in Er by developing an unusual narrow-line MOT that balances optical and magnetic forces using laser light tuned to the blue side of a narrow (8 kHz) transition. The trap population is spin-polarized with temperatures reaching below 2 microkelvin. Our results constitute an alternative method for laser cooling on weak transitions, applicable to rare-earth-metal and metastable alkaline earth elements.

Berglund, Andrew J; McClelland, Jabez J

2008-01-01T23:59:59.000Z

289

Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms  

E-Print Network (OSTI)

Laser cooling on weak transitions is a useful technique for reaching ultracold temperatures in atoms with multiple valence electrons. However, for strongly magnetic atoms a conventional narrow-line magneto-optical trap (MOT) is destabilized by competition between optical and magnetic forces. We overcome this difficulty in Er by developing an unusual narrow-line MOT that balances optical and magnetic forces using laser light tuned to the blue side of a narrow (8 kHz) transition. The trap population is spin-polarized with temperatures reaching below 2 microkelvin. Our results constitute an alternative method for laser cooling on weak transitions, applicable to rare-earth-metal and metastable alkaline earth elements.

Andrew J. Berglund; James L. Hanssen; Jabez J. McClelland

2008-02-06T23:59:59.000Z

290

Fever and Body Temperature  

NLE Websites -- All DOE Office Websites (Extended Search)

Fever and Body Temperature Fever and Body Temperature Name: Ying Location: N/A Country: N/A Date: N/A Question: Hi, I have a few questions that I want to ask you: Why does your body chose to raise its temperature when you have a fever? Replies: Most bacteria and viruses that live in your body grow best at body temperature. They don't grow very well when the temperature is raised. When there are bacteria in your body they give off chemicals that signal white blood cells to come to try to eat them and also affect an area in your brain called the hypothalamus. This part of the brain controls alot of the automatic functions in your body and is also the site of your body's "thermostat". When the chemicals from the bacteria circulate through the hypothalamus it sets the body's temperature higher. This is called a fever. Your body kind of tries to "sweat out" the bacteria and kill them with a higher temperature. Some scientists question whether trying to bring down a fever is the best thing to do. If it isn't too high, some believe we should just let it work

291

PERSONAL BODY ARMOR  

Science Conference Proceedings (OSTI)

... ARMOR ... The handbook was written with the participation of technical experts in the field of personal body armor and was approved by NVLAP. ...

2011-09-21T23:59:59.000Z

292

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

SciTech Connect

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.

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

2012-01-15T23:59:59.000Z

293

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

E-Print Network (OSTI)

Aircraft observation of carbon dioxide at 8-13km altitudedecade, measurements of carbon dioxide (CO ) from space haveEmission Spectrome- ter (TES) carbon dioxide (CO ) satellite

Kulawik, S.S.

2013-01-01T23:59:59.000Z

294

Effect of Narrow Cut Oil Shale Distillates on HCCI Engine Performance  

Science Conference Proceedings (OSTI)

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.

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

295

Search for narrow resonances in the lepton final state at CMS  

E-Print Network (OSTI)

We discuss the results of searches for high-mass narrow resonances decaying into pairs of leptons using pp collisions at 7 TeV delivered by LHC and collected with the CMS detector in 2010 and 2011. These include searches for the Z' bosons and RS gravitons.

Gennadiy Kukartsev; for the CMS Collaboration

2011-10-13T23:59:59.000Z

296

Search for narrow resonances in the lepton final state at CMS  

E-Print Network (OSTI)

We discuss the results of searches for high-mass narrow resonances decaying into pairs of leptons using pp collisions at 7 TeV delivered by LHC and collected with the CMS detector in 2010 and 2011. These include searches for the Z' bosons and RS gravitons.

Kukartsev, Gennadiy

2011-01-01T23:59:59.000Z

297

Vehicle body cover  

SciTech Connect

This patent describes a vehicle body covered with a vehicle body cover which comprises: a front cover part, a rear cover part, a pair of side cover parts, and a roof cover part: the front cover part having portions adapted to cover only a hood, an area around a windshield and tops of front fenders of a vehicle body. The portion covering the hood is separated from the portions covering the tops of the fenders by cuts in the front cover part, the front cover part having an un-cut portion corresponding to a position at which the hood is hinged to the car body. The front cover part has a cut-out at a position corresponding to the windshield of the vehicle body and the front cover part has at least one cut-out at a position corresponding to where a rear view mirror is attached to the vehicle body; and the rear cover part having portions adapted to cover an area around a rear window, a trunk lid and a rear end of the vehicle body, the portion covering the trunk lid separated from the rest of the rear cover part by cuts corresponding to three sides of the trunk lid and an un-cut portion corresponding to a position at which the trunk lid is hinged to the vehicle body. The rear cover part has a hole at position corresponding to a trunk lid lock, a cut-out portion at a position corresponding to the rear window of the vehicle body, a cut-out at a position corresponding to a license plate of the vehicle body and cut-outs at positions corresponding to rear taillights of the vehicle body.

Hirose, T.

1987-01-13T23:59:59.000Z

298

BodyDaemon  

Science Conference Proceedings (OSTI)

This paper describes BodyDaemon a techno-conceptual art project that includes a server that is powered and configured by a participant's physiological states and a protocol for exchanging bio/server data across the Internet. Keywords: biofeedback, body, diy, embodiment, first-person methodologies, interactive art, network, physiological monitoring, protocol, xml

Carlos Castellanos; Thecla Schiphorst

2009-10-01T23:59:59.000Z

299

Maintaining body temperature  

NLE Websites -- All DOE Office Websites (Extended Search)

Maintaining body temperature Maintaining body temperature Name: Jeff Location: N/A Country: N/A Date: N/A Question: What keeps the human body at a constant temperature of 98.6? Replies: Maintaining body temperature is very complex. It also takes a lot of energy. About 80% of the energy from the food you eat goes to maintaining body temperature. Basically, the chemical reactions of metabolism of stored food, especially fats, generate heat as a by product. This heat warms the body. The brain reads temperature and controls to some extent the rate of this metabolism. There are also many other mechanisms triggered by the brain to keep the core of your body warm, even if the periphery (skin) is cold. Blood vessels to the fingers and toes constrict, so that the cold air doesn't cool the blood too much, so that cooled blood doesn't cool down the heart and brain when it returns. In severe cases, your body will sacrifice a finger or a toe to keep you from dying of cold core temperature (frostbite: it saves your life!). Also the brain can order a lot of muscles to contract rapidly. This generates a lot of heat quickly, a response called shivering. There's much more to this exciting field of research.

300

Aircraft Observations of Convective Systems in the Indian Ocean [EVS Event]  

NLE Websites -- All DOE Office Websites (Extended Search)

Aircraft Observations of Convective Systems in the Indian Ocean Aircraft Observations of Convective Systems in the Indian Ocean August 23, 2013 Speaker: Bradley Nicholas Guy National Research Council Postdoctoral Fellow NOAA National Severe Storms Laboratory Date: Friday, August 23, 2013 Time: 11:00 a.m. Location: Argonne National Laboratory TCS Building 240 Room 4301 In the DYNAMO (Dynamics of the Madden-Julian Oscillation) field experiment, a large number of measurement platforms were deployed to study environmental and convective cloud system characteristics of the Madden-Julian Oscillation (MJO) initiation region in the Indian Ocean. A mobile platform, the NOAA P-3 instrumented aircraft, sampled intense convective cloud systems, along with the surrounding environment. This presentation will explore the characteristics of mesoscale convective

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Aerodyne Develops an Aircraft-Deployable Precision Aerosol Analyzer | U.S.  

Office of Science (SC) Website

Aerodyne Develops an Aircraft-Deployable Precision Aerosol Aerodyne Develops an Aircraft-Deployable Precision Aerosol Analyzer Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) SBIR/STTR Home About Funding Opportunity Announcements (FOAs) Applicant and Awardee Resources Commercialization Assistance Other Resources Awards SBIR/STTR Highlights Reporting Fraud Contact Information Small Business Innovation Research and Small Business Technology Transfer U.S. Department of Energy SC-29/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-5707 F: (301) 903-5488 E: sbir-sttr@science.doe.gov More Information » January 2013 Aerodyne Develops an Aircraft-Deployable Precision Aerosol Analyzer Aerodyne Research Inc. develops an aerosol mass spectrometer (AMS) that fills a critical need for size-resolved, quantitative chemical composition

302

Electrical Generation for More-Electric Aircraft using Solid Oxide Fuel Cells  

NLE Websites -- All DOE Office Websites (Extended Search)

XXXXX XXXXX Prepared for the U.S. Department of Energy under Contract 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 Aircraft using Solid Oxide Fuel Cells GA Whyatt LA Chick April 2012 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Pacific Northwest National Laboratory Richland, Washington 99352 iii Summary 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

303

A comparison of the airline benefits of European-style and American-style aircraft purchase options in periods of high demand  

E-Print Network (OSTI)

Commercial Aircraft are commonly acquired by an airline in a contract that specifies a fixed quantity of firm orders as well as options that allow the airline to obtain additional aircraft at a future time for an agreed ...

Miller, Owen (Owen Charles)

2006-01-01T23:59:59.000Z

304

A Pronounced Upper-Tropospheric Warm Anomaly Encountered by the NOAA G-IV Aircraft in the Vicinity of Deep Convection  

Science Conference Proceedings (OSTI)

Recent flights near deep convection by the National Oceanic and Atmospheric Administration's Gulfstream-IV surveillance aircraft have occasionally experienced significant positive temperature anomalies that sometimes impact the aircraft ...

Robert Rogers; Sim Aberson; John Kaplan; Stan Goldenberg

2002-01-01T23:59:59.000Z

305

Analysis of a Radome Air-Motion System on a Twin-Jet Aircraft for Boundary-Layer Research  

Science Conference Proceedings (OSTI)

A radome gust probe system was installed on a twin-jet aircraft for the purpose of boundary-layer research. This system provided a useful relatively low-cost method for air motion and turbulence measurements on an aircraft already equipped with ...

Michael Tjernstrm; Carl A. Friehe

1991-02-01T23:59:59.000Z

306

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

E-Print Network (OSTI)

Development of post-stall capable aircraft has enhanced the research of agility, the ability of an aircraft to quickly and precisely change from its present state to a desired new state, and its measurement. Controlled high angle of attack (AOA) flight and rapid nose-pointing are now realities with thrust vectoring. Traditional measures of merit are incapable of comprehensively describing the rapid changes in aircraft state during close-in combat. As complements to conventional performance measures of merit, agility metrics provide a more complete description of an aircraft's rapid maneuvering capabilities. A batch simulation model of the RockwelVMBB X-31A aircraft is used to evaluate recommended open-loop longitudinal, lateral, and axial agility metrics for their effectiveness in describing transient agility characteristics, maneuvering in the 1-3 second time scale, of a post-stall fighter. Comparison to Valasek and Downing's conventional fighter aircraft agility simulations is done for each axis of agility tests, and the performance improvements due to thrust vectoring are highlighted. The power loss rate and onset rate axial agility metrics are acceptable descriptors of an aircraft's ability to rapidly transition between energy levels. The power loss rate test is modified to include a rapid pitch up maneuver and evaluate the ability to create induced drag and maximize power loss rate. The post-stall axial agility metric. Longitudinal nose pointing metrics maneuver is recommended as a post-stall axial agility metric. Longitudinal nose pointing metrics effectively describe post-stall agility and performance improvements due to thrust vectoring with the maximum, minimum, and average pitch rate metrics. A new flight path agility 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 performance about the velocity vector. A high AOA loaded roll metric is developed using the integral of the velocity vector roll rate as the angle of interest. Acquisition of the X-31A batch simulation Version-120 is recommended as well as incorporating the newly acquired Agile-VU visualization program with metric research and flying recommended closed-loop agility maneuvers on the fixed-base simulator for post-stall agility evaluation.

Fischer, Shiloh Douglas

1996-01-01T23:59:59.000Z

307

Electricity in the Body  

NLE Websites -- All DOE Office Websites (Extended Search)

Electricity in the Body Name: SEAN Location: NA Country: NA Date: NA Question: OUR BRAINS SEND ELECTRICAL IMPULSES RIGHT. IS IT BASICALLY SAME AS NORMAL ELECTRICITY? IS IT LIKE...

308

Body powered thermoelectric systems  

E-Print Network (OSTI)

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 ...

Settaluri, Krishna Tej

2012-01-01T23:59:59.000Z

309

Body Fat as Insulation  

NLE Websites -- All DOE Office Websites (Extended Search)

Body Fat as Insulation Name: Bulza Location: NA Country: NA Date: NA Question: Does the fat layer under the skinkeep an animal warm? Replies: Some animals, yes. Polar bears and...

310

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

Open Energy Info (EERE)

Narrows Tidal Energy Project Narrows Tidal Energy Project < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":47.2591,"lon":-122.445,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

311

WELDED JACKETED URANIUM BODY  

DOE Patents (OSTI)

A fuel element is presented for a neutronic reactor and is comprised of a uranium body, a non-fissionable jacket surrounding sald body, thu jacket including a portion sealed by a weld, and an inclusion in said sealed jacket at said weld of a fiux having a low neutron capture cross-section. The flux is provided by combining chlorine gas and hydrogen in the intense heat of-the arc, in a "Heliarc" welding muthod, to form dry hydrochloric acid gas.

Gurinsky, D.H.

1958-08-26T23:59:59.000Z

312

External vs. body temperature  

NLE Websites -- All DOE Office Websites (Extended Search)

External vs. body temperature External vs. body temperature Name: jacqui Location: N/A Country: N/A Date: N/A Question: If one's internal body temperature is approximately 98.6, WHY when the external temperature is 98.6 do we feel hot? Since both temperatures are "balanced", shouldn't we feel comfortable? I am assuming here that humidity levels are controlled, and play no factor in the external temperature. Replies: First of all, skin temperature is lower than 98.6F; 98.6F is internal body temperature, so air at 98.6F is hotter than skin. But more important, it is the nervous system, and the cells in your skin that your brain uses to detect temperature that determine whether you "feel" hot or not, not whether the air is hotter than your skin. These are set so that you feel hot when the air is actually colder than your skin. Why? They are probably set to make you feel hot whenever the air is warm enough so that your body has some trouble getting rid of the excess heat it produces through metabolism. This insures that you take some actions to help your body cool off. Like drinking cool water, or reducing exercise

313

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

SciTech Connect

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.

Maddalena, Randy I.; McKone, Thomas E.

2008-10-01T23:59:59.000Z

314

Achieving safety: a field study of boundary objects in aircraft technical support  

Science Conference Proceedings (OSTI)

Boundary objects are a critical, but understudied, theoretical construct in CSCW. Through a field study of aircraft technical support, we examined the role of boundary objects in the "achievement of safety" by service engineers. The resolution process ... Keywords: boundary objects, collaborative work, high reliability organizations, hotlines, information reuse, organizational memory, safety, service engineering, technical support

Wayne G. Lutters; Mark S. Ackerman

2002-11-01T23:59:59.000Z

315

Analysis of an Air Motion System on a Light Aircraft for Boundary Layer Research  

Science Conference Proceedings (OSTI)

A system has been developed for use on a light aircraft for the measurement of the turbulent wind vector components that does not rely on the use of either an inertial navigation system (INS) or Doppler radar. The system described here uses a ...

R. Wood; I. M. Stromberg; P. R. Jonas; C. S. Mill

1997-08-01T23:59:59.000Z

316

A 94-GHz Cloud Radar System on a NASA High-Altitude ER-2 Aircraft  

Science Conference Proceedings (OSTI)

The 94-GHz (W band) Cloud Radar System (CRS) has been developed and flown on a NASA ER-2 high-altitude (20 km) aircraft. The CRS is a fully coherent, polarimetric Doppler radar that is capable of detecting clouds and precipitation from the ...

Lihua Li; Gerald M. Heymsfield; Paul E. Racette; Lin Tian; Ed Zenker

2004-09-01T23:59:59.000Z

317

The EDOP Radar System on the High-Altitude NASA ER-2 Aircraft  

Science Conference Proceedings (OSTI)

The NASA ER-2 high-altitude (20 km) aircraft that emulates a satellite view of precipitation systems carries a variety of passive and active (lidar) remote sensing instruments. A new Doppler weather radar system at X band (9.6 GHz) called the ER-...

Gerald M. Heymsfield; Steven W. Bidwell; I. Jeff Caylor; Syed Ameen; Shaun Nicholson; Wayne Boncyk; Lee Miller; Doug Vandemark; Paul E. Racette; Louis R. Dod

1996-08-01T23:59:59.000Z

318

Compartmental anaerobic baffled reactor kinetic model for treatment of dilute aircraft deicing fluid  

Science Conference Proceedings (OSTI)

A four-compartment, anaerobic baffled reactor (ABR) incorporating granular sludge biomass (GSB) was operated at different hydraulic retention times (HRTs) in the range of 3 to 24 hours using dilute aircraft deicing fluid (ADF) with different chemical ... Keywords: anaerobic, baffled reactor, deicing fluid

Juan Marin; Kevin J. Kennedy; Cigdem Eskicioglu; Mohamed F. Hamoda

2007-08-01T23:59:59.000Z

319

Time and Frequency Response of a Resistance-Wire Aircraft Atmospheric Temperature Sensor  

Science Conference Proceedings (OSTI)

The heat transfer characteristics of an aircraft-mounted resistance-wire atmospheric temperature sensor are modeled to determine the time and frequency responses. The sensor element (Rosemount 102E4AL) consists of a 25-?m-diameter platinum wire ...

G. A. Payne; C. A. Friehe; D. K. Edwards

1994-04-01T23:59:59.000Z

320

An Axial-Flow Cyclone for Aircraft-Based Cloud Water Sampling  

Science Conference Proceedings (OSTI)

A new aircraft-based cloud water collection system has been developed to provide samples of cloud water for chemical analysis. The collection system makes use of centrifugal separation in an axial-flow cyclone to remove cloud drops from the ...

Derek J. Straub; Jeffrey L. Collett Jr.

2004-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Power systems and requirements for integration of smart structures into aircraft  

E-Print Network (OSTI)

the requisite electrical power, usually in the 50 to 100 kW range for a modern tactical aircraft, and a lower and results ­ highlighting wind tunnel power measurements from shape memory alloy and piezoelectric ultrasonic specification of MIL-STD-7041 . The upper loop in the diagram provides emergency power through an air turbine

Lindner, Douglas K.

322

Typhoon Structure as Revealed by Aircraft Reconnaissance. Part II: Structural Variability  

Science Conference Proceedings (OSTI)

This is the second of two papers on the structure of northwest Pacific tropical cyclones as revealed by U.S. Air Force aircraft reconnaissance. This paper describes the varying structure of the tropical cyclone's outer-radius wind profile in ...

Candis L. Weatherford; William M. Gray

1988-05-01T23:59:59.000Z

323

Theoretical and Experimental Characterization of the Ultrafast Aircraft Thermometer: Reduction of Aerodynamic Disturbances and Signal Processing  

Science Conference Proceedings (OSTI)

The ultrafast aircraft thermometer, built for measuring temperature in clouds at flight speeds up to 100 m?s?1, employs a 2.5-?m-thick platinum-coated tungsten wire as a sensing element. When temperature increases, the wire resistance increases. ...

Bogdan Rosa; Konrad Bajer; Krzysztof E. Haman; Tomasz Szoplik

2005-07-01T23:59:59.000Z

324

Standoff Target Tracking using a Vector Field for Multiple Unmanned Aircrafts  

Science Conference Proceedings (OSTI)

This paper presents strategies for standoff target tracking by a team of unmanned aircrafts using vector field. Many methods to the vector field approach were investigated in other papers, but a modified vector field is introduced to obtain new interesting ... Keywords: Cooperative control, Target tracking, UAV, Vector field, Vector field control, Vector field guidance

Seunghan Lim; Yeongju Kim; Dongjin Lee; Hyochoong Bang

2013-01-01T23:59:59.000Z

325

A Reference Software Architecture to Support Unmanned Aircraft Integration in the National Airspace System  

Science Conference Proceedings (OSTI)

This paper outlines an architecture that provides data and software services to enable a set of Unmanned Aircraft (UA) platforms to operate in a wide range of air domains which may include terminal, en route, oceanic and tactical. The architecture allows ... Keywords: Reference architecture, Sense and Avoid, Service Oriented Architecture, Testbed, Unmanned Air vehicle

Curtis W. Heisey; Adam G. Hendrickson; Barbara J. Chludzinski; Rodney E. Cole; Mark Ford; Larry Herbek; Magnus Ljungberg; Zakir Magdum; D. Marquis; Alexander Mezhirov; John L. Pennell; Ted A. Roe; Andrew J. Weinert

2013-01-01T23:59:59.000Z

326

A New Fast Response Instrument for Measuring Total Water Content from Aircraft  

Science Conference Proceedings (OSTI)

A device for measuring the total water content of a parcel of air from an aircraft has been developed. The total water of a parcel of air is a conserved quantity, independent of phase changes, provided there is no transport of water through the ...

S. Nicholls; J. Leighton; R. Barker

1990-10-01T23:59:59.000Z

327

An Unmanned Aircraft System for Automatic Forest Fire Monitoring and Measurement  

Science Conference Proceedings (OSTI)

The paper presents an Unmanned Aircraft System (UAS), consisting of several aerial vehicles and a central station, for forest fire monitoring. Fire monitoring is defined as the computation in real-time of the evolution of the fire front shape and potentially ... Keywords: Cooperative perception, Forest fire fighting, UAS

Luis Merino; Fernando Caballero; J. Ramiro Martnez-De-Dios; Ivn Maza; Anbal Ollero

2012-01-01T23:59:59.000Z

328

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

E-Print Network (OSTI)

that estimates the remaining life and also a case study that indicates that a non-stationary renewal process equipment that needs to be utilized as e#30;ciently as possible to pay back the cost of investment maintenance to enable the minimization of the total expected cost to have a functional aircraft engine

Patriksson, Michael

329

The Impact of Aircraft Data on an Atlantic Cyclone Analyzed in Terms of Sensitivities and Trajectories  

Science Conference Proceedings (OSTI)

A case study of an eastern Atlantic cyclogenesis event is conducted. The focus is on the impact of aircraft data on both the analysis and forecast of the event. The case takes place between 1 and 3 February 1994 and involves a phase of explosive ...

Batrice Pouponneau; Franck Ayrault; Thierry Bergot; Alain Joly

1999-02-01T23:59:59.000Z

330

Optik- AN-30 Aircraft Laboratory for Studies of the Atmospheric Composition  

Science Conference Proceedings (OSTI)

The scientific instrumental complex of the Optik- AN-30 aircraft laboratory developed at the Institute of Atmospheric Optics of the Siberian Branch of the Russian Academy of Sciences is described in detail. Specifications of the main units of the ...

Pavel N. Antokhin; Michael Yu Arshinov; Boris D. Belan; Denis K. Davydov; Eugenii V. Zhidovkin; Georgii A. Ivlev; Artiom V. Kozlov; Valerii S. Kozlov; Michael V. Panchenko; Ioganes E. Penner; Dimitrii A. Pestunov; Denis V. Simonenkov; Gennadii N. Tolmachev; Alexander V. Fofonov; Vitalii S. Shamanaev; Vladimir P. Shmargunov

2012-01-01T23:59:59.000Z

331

An Investigation of a Commercial Aircraft Encounter with Severe Clear-Air Turbulence over Western Greenland  

Science Conference Proceedings (OSTI)

This study presents digital flight data recorder (DFDR) analyses and high-resolution numerical simulations relevant to a severe clear-air turbulence (CAT) encounter over western Greenland by a Boeing 777 aircraft at 10-km elevation at 1305 UTC 25 ...

R. D. Sharman; J. D. Doyle; M. A. Shapiro

2012-01-01T23:59:59.000Z

332

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

E-Print Network (OSTI)

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

Palmer, Paul

333

Instrumented Aircraft Observations of the Katabatic Wind Regime Near Terra Nova Bay  

Science Conference Proceedings (OSTI)

Two aircraft missions to sample the boundary layer dynamics associated with the intense katabatic wind regime at Terra Nova Bay, Antarctica were flown on successive days in early November 1987. Light winds averaging 5 m s?1 were monitored at the ...

Thomas R. Parish; David H. Bromwich

1989-07-01T23:59:59.000Z

334

Impact of Heavy Aircraft Operations on Airport Capacity at Newark Liberty International Airport  

E-Print Network (OSTI)

Impact of Heavy Aircraft Operations on Airport Capacity at Newark Liberty International Airport Meteorological Conditions (VMC) for the period 2007-2008. The ef- fect of the number of Heavy (including Boeing that Heavy departures and arrivals negatively impact overall airport capacity. Mechanisms by which

335

Introduction Aerial surveys from aircraft are a critical component of many environmental research,  

E-Print Network (OSTI)

Introduction Aerial surveys from aircraft are a critical component of many environmental research an ability to directly estimate detection probability. By bringing the ground sampling and aerial survey more safety concerns because of low altitude flights and tight maneuvers necessary for such surveys

Mazzotti, Frank

336

Calibration of the Solar Channels of the NOAA-9 AVHRR Using High Altitude Aircraft Measurements  

Science Conference Proceedings (OSTI)

A method for calibrating satellite radiometers is investigated. A calibrated spectral radiometer carried aboard a U2 aircraft at an altitude of 60 000 ft was aligned with White Sands. New Mexico along the same view vector as the Advanced Very ...

Gilbert R. Smith; Robert H. Levin; Peter Abel; Herbert Jacobowitz

1988-10-01T23:59:59.000Z

337

Selling body organs  

NLE Websites -- All DOE Office Websites (Extended Search)

Selling body organs Selling body organs Name: Betty A Laliberte Location: N/A Country: N/A Date: N/A Question: If a tissue donor dies and some of his/her tissue is donated, should the family be given money or some other benefit? I am a freshman at York HS and am doing a bioethics project. Replies: An interesting question. In my opinion, a family should not receive payment for organ donation. That would introduce an economic element into the decision, which does not seem appropriate. One problem is: Who will pay? The recipient? What if he can't afford it? Who gets the organ? The highest bidder? I guess part of my problem with selling organs and tissues is religious in nature. To me, my life and my body were given freely to me and they are not mine to sell to someone else. They certainly do not belong to my family to profit from.

338

Load Capacity of Bodies  

E-Print Network (OSTI)

For the stress analysis in a plastic body $\\Omega$, we prove that there exists a maximal positive number $C$, the \\emph{load capacity ratio,} such that the body will not collapse under any external traction field $t$ bounded by $Y_{0}C$, where $Y_0$ is the elastic limit. The load capacity ratio depends only on the geometry of the body and is given by $$ \\frac{1}{C}=\\sup_{w\\in LD(\\Omega)_D} \\frac{\\int_{\\partial\\Omega}|w|dA} {\\int_{\\Omega}|\\epsilon(w)|dV}=\\left\\|\\gamma_D\\right\\|. $$ Here, $LD(\\Omega)_D$ is the space of isochoric vector fields $w$ for which the corresponding stretchings $\\epsilon(w)$ are assumed to be integrable and $\\gamma_D$ is the trace mapping assigning the boundary value $\\gamma_D(w)$ to any $w\\in LD(\\Omega)_D$.

Reuven Segev

2005-11-01T23:59:59.000Z

339

Full-Scale Structural and NDI Validation Tests of Bonded Composite Doublers for Commercial Aircraft Applications  

Science Conference Proceedings (OSTI)

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.

Roach, D.; Walkington, P.

1999-02-01T23:59:59.000Z

340

Preparation of the spacer for narrow electrode gap configuration in ionization-based gas sensor  

Science Conference Proceedings (OSTI)

Carbon nanotubes (CNTs) have started to be developed as the sensing element for ionization-based gas sensors due to the demand for improved sensitivity, selectivity, stability and other sensing properties beyond what can be offered by the conventional ones. Although these limitations have been overcome, the problems still remain with the conventional ionization-based gas sensors in that they are bulky and operating with large breakdown voltage and high temperature. Recent studies have shown that the breakdown voltage can be reduced by using nanostructured electrodes and narrow electrode gap. Nanostructured electrode in the form of aligned CNTs array with evenly distributed nanotips can enhance the linear electric field significantly. The later is attributed to the shorter conductivity path through narrow electrode gap. The paper presents the study on the design consideration in order to realize ionization based gas sensor using aligned carbon nanotubes array in an optimum sensor configuration with narrow electrode gap. Several deposition techniques were studied to deposit the spacer, the key component that can control the electrode gap. Plasma spray deposition, electron beam deposition and dry oxidation method were employed to obtain minimum film thickness around 32 {mu}m. For plasma spray method, sand blasting process is required in order to produce rough surface for strong bonding of the deposited film onto the surface. Film thickness, typically about 39 {mu}m can be obtained. For the electron beam deposition and dry oxidation, the film thickness is in the range of nanometers and thus unsuitable to produce the spacer. The deposited multilayer film consisting of copper, alumina and ferum on which CNTs array will be grown was found to be removed during the etching process. This is attributed to the high etching rate on the thin film which can be prevented by reducing the rate and having a thicker conductive copper film.

Saheed, Mohamed Shuaib Mohamed; Mohamed, Norani Muti; Burhanudin, Zainal Arif [Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Tronoh, Perak. (Malaysia); Fundamental and Applied Science, Universiti Teknologi PETRONAS, Seri Iskandar, Tronoh, Perak. (Malaysia); Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Tronoh, Perak. (Malaysia)

2012-09-26T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Porous metallic bodies  

DOE Patents (OSTI)

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

Landingham, R.L.

1984-03-13T23:59:59.000Z

342

Construction of narrow-band regenerative amplifier for momentum imaging spectroscopy of lithium dimer  

Science Conference Proceedings (OSTI)

We constructed a Ti:Sapphire narrow-band regenerative amplifier as the probe laser of the experiment of momentum imaging spectroscopy of lithium dimer. The spectral profile of the regenerative cavity was designed by three birefringent filters and a plate of etalon. With 1.1-mJ pumping by the second harmonics of Nd:YLF laser, mode-locked seed pulses were amplified to {approx}25 {mu}J at 1-kHz repetition, with the bandwidth of {approx}0.7 cm{sup -1}.

Matsuoka, Leo; Hashimoto, Masashi; Yokoyama, Keiichi [Quantum Beam Science Directorate, Japan Atomic Energy Agency, 8-1-7, Umemidai, Kizugawa, Kyoto 619-0215 (Japan)

2012-07-11T23:59:59.000Z

343

Measurement of the surface wavelength distribution of narrow-band radiation by a colorimetric method  

SciTech Connect

A method is suggested for determining the wavelength of narrow-band light from a digital photograph of a radiating surface. The digital camera used should be appropriately calibrated. The accuracy of the wavelength measurement is better than 1 nm. The method was tested on the yellow doublet of mercury spectrum and on the adjacent continuum of the incandescent lamp radiation spectrum. By means of the method suggested the homogeneity of holographic sensor swelling was studied in stationary and transient cases. (laser applications and other topics in quantum electronics)

Kraiskii, A V; Mironova, T V; Sultanov, T T [P N Lebedev Physical Institute, Russian Academy of Sciences, Moscow (Russian Federation)

2010-09-10T23:59:59.000Z

344

Simulation of an Electrostatic Energy Harvester at Large Amplitude Narrow and Wide Band Vibrations  

E-Print Network (OSTI)

An electrostatic in-plane overlap varying energy harvester is modeled and simulated using a circuit simulator. Both linear and nonlinear models are investigated. The nonlinear model includes mechanical stoppers at the displacement extremes. Large amplitude excitation signals, both narrow and wide band, are used to emulate environmental vibrations. Nonlinear behavior is significant at large displacement due to the impact on mechanical stoppers. For a sinusoidal excitation the mechanical stoppers cause the output power to flatten and weakly decrease. For a wide band excitation, the output power first increases linearly with the power spectral density of the input signal, then grows slower than linearly.

Tvedt, Lars Geir Whist; Halvorsen, Einar

2008-01-01T23:59:59.000Z

345

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

Science Conference Proceedings (OSTI)

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.

Kenneth Paul Roberts

2002-06-27T23:59:59.000Z

346

The 12/13 January 1988 Narrow Cold-Frontal Rainband Observed during MFDP/FRONTS 87. Part II: Microphysics  

Science Conference Proceedings (OSTI)

The microphysics of a narrow cold-frontal rainband (NCFR) observed during the MFDP/FRONTS87 experiment is investigated by using a microphysical retrieval model. The equations of evolution of the water substance and of the temperature are solved ...

Virginie Marcal; Danile Hauser; Frank Roux

1993-04-01T23:59:59.000Z

347

Narrow- and Broad-Band Satellite Measurements of Shortwave Radiation: Conversion Simulations with a General Circulation Model  

Science Conference Proceedings (OSTI)

The Oregon State University/Lawrence Livermore National Laboratory general circulation model has been employed as a vehicle for suggesting and exploring various means of converting narrow-band measurements of reflected solar radiation from the ...

Robert D. Cess; Gerald L. Potter

1986-12-01T23:59:59.000Z

348

The stabilization of a methane-air edge flame within a mixing layer in a narrow channel  

SciTech Connect

The flame stabilization mechanism of a methane-air edge flame formulated in a narrow channel was experimentally investigated and compared with a simple analytical model. Non-premixed flames were classified into premixed flame modes and edge flame modes. The correlation between the propagation velocity and the fuel concentration gradient in a narrow channel was investigated and the applicability of ordinary edge-flame theory was appraised. (author)

Lee, Min Jung; Kim, Nam Il [School of Mechanical Engineering, Chung-Ang University, Dongjak, Seoul 156-76 (Korea)

2010-01-15T23:59:59.000Z

349

Slim Disks with Transition Regions and Applications to Microquasars and Narrow Line Seyfert 1 Galaxies  

E-Print Network (OSTI)

Slim disks have been received much attention because of the increasing evidence for the super-critical accreting objects. In this paper, we make an attempt to construct a unified model, in which the viscosity and the dimensionless accretion rate can span rather wide ranges. We replace blackbody radiation under diffusion approximation with a bridged formula, which accounts for both blackbody radiation and thermal bremsstrahlung in optically-thick and -thin cases, respectively. Thus this allows us to investigate the structures of and the emergent spectra from slim disks in a wider parameter space, covering transition regions from optically thick to optically thin. We show that there is a maximum transition radius, roughly $R_{\\rm tr, max}/R_g\\sim 50$ when $\\dot{M}/\\dot{M}_{\\rm C}\\sim 15$. The emergent spectra from the unified model of the accretion disk have been calculated. A simple model of hot corona above the slim disk is taken into account for the hard X-ray spectrum in this paper based on Wang & Netzer (2003). We have applied the present model to the microquasar GRS 1915+105, narrow line Seyfert 1 galaxies RE J1034+396 and Akn 564. Our model can explain well the broadband X-ray spectra of narrow line Seyfert 1 galaxies, microquasars and possible ultra-luminous compact X-ray sources. The present model can be widely applied to the candidates of super-critical accreting objects.

Lin-Hong Chen; Jian-Min Wang

2004-07-07T23:59:59.000Z

350

A Search for Narrow Vertical Structures in the Canadian Galactic Plane Survey  

E-Print Network (OSTI)

Worms are defined to be dusty, atomic hydrogen (HI) structures which are observed in low resolution data to rise perpendicular to the Galactic plane. Data from the 1'-resolution Canadian Galactic Plane Survey (CGPS) were systematically searched for narrow vertical HI structures which could be resolved worms. Another motivation for the search was to explore the scenario that mushroom-shaped worms like GW123.4-1.5, studied by English and collaborators, could be generated by a single supernova. However no other vertical structures of mushroom-shape morphology were found. We also examined objects previously classified as worm candidates by Koo and collaborators; only 7 have a significant portion of their structure falling in the CGPS range of l=74 deg to 147 deg, -3.5 deg ~ 500 pc tall, thus extending from the Galactic plane into the halo. We provide details about these narrow vertical structures, including comparisons between HI, radio continuum, IR, and CO observations. Our search was conducted by visual inspection and we describe the limitations of this approach since it indicates that only 6 disk-halo features may exist throughout the Milky Way. We also discuss possible origins of structures at high latitudes and the relationship between mushroom-shaped clouds and old supernova remnants.

Ashish Asgekar; Jayanne English; Samar Safi-Harb; Roland Kothes

2004-11-26T23:59:59.000Z

351

STIS Ultraviolet Spectral Evidence for Outflows in Extreme Narrow-Line Seyfert 1 Galaxies  

E-Print Network (OSTI)

(abridged) I present and discuss the results of HST STIS observations of IRAS 13224-3809 and 1H 0707-495, two narrow-line Seyfert 1 (NLS1) galaxies. We discovered that high-ionization UV emission lines are much broader and strongly blueshifted compared with the low-ionization and intermediate-ionization lines, which are relatively narrow and centered at the rest wavelength. We interpret this as evidence that the high-ionization lines come from a wind, while the low-ionization lines are emitted from the accretion disk or low-velocity base of the wind. The optically thick disk blocks our view of the receding wind. We also found that not all NLS1s display strongly blueshifted emission lines, and the degree of asymmetry is inversely correlated with the equivalent width and correlated with the SiIII] to CIII] ratio, a density indicator. It may also be significant that these NLS1s display the extreme in the X-ray properties: they have the strongest X-ray soft-excess components and the highest-amplitude, flaring variability. We postulate that this combination of properties are all related to a high value of L/M_BH, even among NLS1s. The high-ionization and low-ionization lines are nearly completely kinematically separated, a fact that allows us to study the conditions in the disk and wind separately.(...)

Karen M. Leighly

2000-12-08T23:59:59.000Z

352

STIS Ultraviolet Spectral Evidence for Outflows in Extreme Narrow-Line Seyfert 1 Galaxies  

E-Print Network (OSTI)

(abridged) I present and discuss the results of HST STIS observations of IRAS 13224-3809 and 1H 0707-495, two narrow-line Seyfert 1 (NLS1) galaxies. We discovered that high-ionization UV emission lines are much broader and strongly blueshifted compared with the low-ionization and intermediate-ionization lines, which are relatively narrow and centered at the rest wavelength. We interpret this as evidence that the high-ionization lines come from a wind, while the low-ionization lines are emitted from the accretion disk or low-velocity base of the wind. The optically thick disk blocks our view of the receding wind. We also found that not all NLS1s display strongly blueshifted emission lines, and the degree of asymmetry is inversely correlated with the equivalent width and correlated with the SiIII] to CIII] ratio, a density indicator. It may also be significant that these NLS1s display the extreme in the X-ray properties: they have the strongest X-ray soft-excess components and the highest-amplitude, flaring var...

Leighly, K M

2000-01-01T23:59:59.000Z

353

A Case Study of the Origin of Hail in a Multicell Thunderstorm Using In Situ Aircraft and Polarimetric Radar Data  

Science Conference Proceedings (OSTI)

An armored T-28 research aircraft made direct observations of the hydrometeors present at approximately the ?3C temperature level in the inflow region of a multicell thunderstorm. During the penetration, both the Colorado State University (CSU)...

Patrick C. Kennedy; Andrew G. Detwiler

2003-11-01T23:59:59.000Z

354

A Comparison of Measured and Modeled Broadband Fluxes from Aircraft Data during the ICE '89 Field Experiment  

Science Conference Proceedings (OSTI)

During the 1989 intensive field campaign of the International Cirrus Experiment (ICE) over the North Sea, broadband radiative fluxes were measured in, above, and below cirrus cloud by a number of European meteorological research aircraft. One ...

R. W. Saunders; G. Brogniez; J. C. Buriez; R. Meerktter; P. Wendling

1992-08-01T23:59:59.000Z

355

An Airborne and Wind Tunnel Evaluation of a Wind Turbulence Measurement System for Aircraft-Based Flux Measurements  

Science Conference Proceedings (OSTI)

Although the ability to measure vertical eddy fluxes of gases from aircraft platforms represents an important capability to obtain spatially resolved data, accurate and reliable determination of the turbulent vertical velocity presents a great ...

K. E. Garman; K. A. Hill; P. Wyss; M. Carlsen; J. R. Zimmerman; B. H. Stirm; T. Q. Carney; R. Santini; P. B. Shepson

2006-12-01T23:59:59.000Z

356

Online measurements of the emissions of intermediate-volatility and semi-volatile organic compounds from aircraft  

E-Print Network (OSTI)

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 ...

Herndon, S. C.

357

A Satellite-Based Climatic Description of Jet Aircraft Contrails and Associations with Atmospheric Conditions, 197779  

Science Conference Proceedings (OSTI)

The possible contribution of jet aircraft condensation trails (contrails) to recent observed increases in high cloudiness constitutes a potentially important human effect on climate that has received relatively little attention. Very high ...

James Q. DeGrand; Andrew M. Carleton; David J. Travis; Peter J. Lamb

2000-09-01T23:59:59.000Z

358

Lease classification of aircraft leasing : a case study of cross-border leases between Korean Air and its subsidiary  

E-Print Network (OSTI)

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 ...

Park, Eun Ho, M.B.A. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

359

Turbulence Structure of the Convective Boundary Layer. Part II. Phonenix 78 Aircraft Observations of Thermals and Their Environment  

Science Conference Proceedings (OSTI)

A conditional sampling technique based upon the mixed layer spectra of vertical velocity and temperature is developed. This technique is used to analyze the turbulence data obtained by aircraft during the Phoenix 78 convective boundary layer ...

George S. Young

1988-02-01T23:59:59.000Z

360

Remote Sensing of Thermal Radiation from an AircraftAn Analysis and Evaluation of Crop-Freeze Protection Methods  

Science Conference Proceedings (OSTI)

Thermal images from an aircraft-mounted scanner are used to evaluate the effectiveness of crop-freeze protection devices. Data from flights made while using fuel oil heaters, a wind machine and an undercanopy irrigation system are compared. ...

R. A. Sutherland; H. E. Hannah; A. F. Cook; J. D. Martsolf

1981-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Observations of the Sea-Breeze Front during CaPE. Part II: Dual-Doppler and Aircraft Analysis  

Science Conference Proceedings (OSTI)

The three-dimensional kinematic structures of offshore and onshore flow sea-breeze fronts observed during the CaPE experiment are shown using high resolution dual-Doppler and aircraft data. The fronts interact with horizontal convective rolls (...

Nolan T. Atkins; Roger M. Wakimoto; Tammy M. Weckwerth

1995-04-01T23:59:59.000Z

362

Aircraft Measurements of Power Plant Plumes During CCOS and Their Use for the Evaluation of the SCICHEM Model  

Science Conference Proceedings (OSTI)

This report describes aircraft measurements of power plant plumes during the Central California Ozone Study (CCOS) in July and August 2002 and use of those measurements to evaluate the Second-order Closure Integrated puff model (SCIPUFF) with CHEMistry (SCICHEM).

2003-03-05T23:59:59.000Z

363

Velocity and Temperature Structure Functions in the Upper Troposphere and Lower Stratosphere from High-Resolution Aircraft Measurements  

Science Conference Proceedings (OSTI)

High-resolution measurements obtained from NOAA best atmospheric turbulence (BAT) probes mounted on an EGRETT high-altitude research aircraft were used to characterize turbulence in the upper troposphere and lower stratosphere at scales from 2 ...

Donald E. Wroblewski; Owen R. Cot; Jorg M. Hacker; Ronald J. Dobosy

2010-04-01T23:59:59.000Z

364

Determining the Flight Icing Threat to Aircraft with Single-Layer Cloud Parameters Derived from Operational Satellite Data  

Science Conference Proceedings (OSTI)

An algorithm is developed to determine the flight icing threat to aircraft utilizing quantitative information on clouds derived from meteorological satellite data as input. Algorithm inputs include the satellite-derived cloud-top temperature, ...

William L. Smith Jr.; Patrick Minnis; Cecilia Fleeger; Douglas Spangenberg; Rabindra Palikonda; Louis Nguyen

2012-10-01T23:59:59.000Z

365

Description of Selected Algorithms and Implementation Details of a Concept-Demonstration Aircraft VOrtex Spacing System (AVOSS)  

Science Conference Proceedings (OSTI)

A ground-based system has been developed to demonstrate the feasibility of automating the process of collecting relevant weather data, predicting wake vortex behavior from a data base of aircraft, prescribing safe wake vortex spacing criteria, estimating ...

Hinton David A.

2001-06-01T23:59:59.000Z

366

The Stabilized Radiometer Platform (STRAP)An Actively Stabilized Horizontally Level Platform for Improved Aircraft Irradiance Measurements  

Science Conference Proceedings (OSTI)

Measurements of solar and infrared irradiance by instruments rigidly mounted to an aircraft have historically been plagued by the introduction of offsets and fluctuations into the data that are solely due to the pitch and roll movements of the ...

Anthony Bucholtz; Robert T. Bluth; Ben Kelly; Scott Taylor; Keir Batson; Anthony W. Sarto; Tim P. Tooman; Robert F. McCoy Jr.

2008-12-01T23:59:59.000Z

367

Mean and Flux Horizontal Variability of Virtual Potential Temperature, Moisture, and Carbon Dioxide: Aircraft Observations and LES Study  

Science Conference Proceedings (OSTI)

The effects of the horizontal variability of surface properties on the turbulent fluxes of virtual potential temperature, moisture, and carbon dioxide are investigated by combining aircraft observations with large-eddy simulations (LESs). Daytime ...

Monica Grska; Jordi Vil-Guerau de Arellano; Margaret A. LeMone; Chiel C. van Heerwaarden

2008-11-01T23:59:59.000Z

368

REACTOR AND SHIELD PHYSICS. Comprehensive Technical Report, General Electric Direct-Air-Cycle, Aircraft Nuclear Propulsion Program.  

SciTech Connect

This volume is one of twenty-one summarizing the Aircraft Nuclear Propulsion Program of the General Electric Company. This volume describes the experimental and theoretical work accomplished in the areas of reactor and shield physics.

Edwards, W.E.; Simpson, J.D.

1962-01-01T23:59:59.000Z

369

Alteration And Geochemical Zoning In Bodie Bluff, Bodie Mining District,  

Open Energy Info (EERE)

Alteration And Geochemical Zoning In Bodie Bluff, Bodie Mining District, Alteration And Geochemical Zoning In Bodie Bluff, Bodie Mining District, Eastern California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Alteration And Geochemical Zoning In Bodie Bluff, Bodie Mining District, Eastern California Details Activities (0) Areas (0) Regions (0) Abstract: Banded, epithermal quartz-adularia veins have produced about 1.5 million ounces of gold and 7 million ounces of silver from the Bodie mining district, eastern California. The veins cut dacitic lava flows, pyroclastic rocks and intrusions. Sinter boulders occur in a graben structure at the top of Bodie Bluff and fragments of sinter and mineralized quartz veins occur in hydrothermal breccias nearby. Explosive venting evidently was part of the evolution of the ore-forming geothermal systems which, at one time,

370

Machining of Aircraft Titanium with Abrasive-Waterjets for Fatigue Critical Applications  

Science Conference Proceedings (OSTI)

Laboratory tests were conducted to determine the fatigue performance of AWJ-machined aircraft titanium. Dog-bone specimens machined with AWJs were prepared and tested with and without sanding and dry-grit blasting with Al2O3 as secondary processes. The secondary processes were applied to remove the visual appearance of AWJ-generated striations and to clean up the garnet embedment. The fatigue performance of AWJ-machined specimens was compared with baseline specimens machined with CNC milling. Fatigue test results not only confirmed the findings of the aluminum dog-bone specimens but also further enhance the fatigue performance. In addition, titanium is known to be notoriously difficult to cut with contact tools while AWJs cut it 34% faster than stainless steel. AWJ cutting and dry-grit blasting are shown to be a preferred combination for processing aircraft titanium that is fatigue critical.

Liu, H. T.; Hovanski, Yuri; Dahl, Michael E.

2010-10-04T23:59:59.000Z

371

Machining of Aircraft Titanium with Abrasive-Waterjets for Fatigue Critical Applications  

Science Conference Proceedings (OSTI)

Laboratory tests were conducted to determine the fatigue performance of abrasive-waterjet- (AWJ-) machined aircraft titanium. Dog-bone specimens machined with AWJs were prepared and tested with and without sanding and dry-grit blasting with Al2O3 as secondary processes. The secondary processes were applied to remove the visual appearance of AWJ-generated striations and to clean up the garnet embedment. The fatigue performance of AWJ-machined specimens was compared with baseline specimens machined with CNC milling. Fatigue test results of the titanium specimens not only confirmed our previous findings in aluminum dog-bone specimens but in comparison also further enhanced the fatigue performance of the titanium. In addition, titanium is known to be difficult to cut, particularly for thick parts, however AWJs cut the material 34% faster han stainless steel. AWJ cutting and dry-grit blasting are shown to be a preferred ombination for processing aircraft titanium that is fatigue critical.

Liu, H. T.; Hovanski, Yuri; Dahl, Michael E.

2012-02-01T23:59:59.000Z

372

A miniature powerplant for very small, very long range autonomous aircraft. Final report  

DOE Green Energy (OSTI)

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.

Tad McGeer

1999-09-29T23:59:59.000Z

373

RACORO Extended-Term Aircraft Observations of Boundary-Layer Clouds  

SciTech Connect

A first-of-a-kind, extended-term cloud aircraft campaign was conducted to obtain an in-situ statistical characterization of boundary-layer clouds needed to investigate cloud processes and refine retrieval algorithms. Coordinated by the Atmospheric Radiation Measurement (ARM) Aerial Facility (AAF), the Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations (RACORO) field campaign operated over the ARM Southern Great Plains (SGP) site from 22 January to 30 June 2009, collecting 260 h of data during 59 research flights. A comprehensive payload aboard the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin Otter aircraft measured cloud microphysics, solar and thermal radiation, aerosol properties, and atmospheric state parameters. Proximity to the SGP's extensive complement of surface measurements provides ancillary data that supports modeling studies and enables evaluating a variety of surface retrieval algorithms. The five-month duration enabled sampling a range of conditions associated with the seasonal transition from winter to summer. Although about two-thirds of the cloud flights occurred in May and June, boundary-layer cloud fields were sampled under a variety of environmental and aerosol conditions, with about 75% of the flights occurring in cumulus and stratocumulus. Preliminary analyses show how these data are being used to analyze cloud-aerosol relationships, determine the aerosol sizes that are responsible for nucleating cloud drops, characterize the horizontal variability of the cloud radiative impacts, and evaluate air-borne and surface-based cloud property retrievals. We discuss how conducting an extended-term campaign requires a simplified operating paradigm that is different from that used for typical, short-term, intensive aircraft field programs.

Vogelmann, A. M.; McFarquhar, Greg; Ogren, John A.; Turner, David D.; Comstock, Jennifer M.; Feingold, G.; Long, Charles N.; Jonsson, Haf; Bucholtz, Anthony; Collins, Donald R.; Diskin, G. S.; Gerber, H.; Lawson, Paul; Woods, Roy; Andrews, Elizabeth; Yang, Hee-Jung; Chiu, Christine J.; Hartsock, Daniel; Hubbe, John M.; Lo, Chaomei; Marshak, A.; Monroe, Justin; McFarlane, Sally A.; Schmid, Beat; Tomlinson, Jason M.; Toto, Tami

2012-06-30T23:59:59.000Z

374

Impact of supersonic and subsonic aircraft on ozone: Including heterogeneous chemical reaction mechanisms  

Science Conference Proceedings (OSTI)

Preliminary calculations suggest that heterogeneous reactions are important in calculating the impact on ozone from emissions of trace gases from aircraft fleets. In this study, three heterogeneous chemical processes that occur on background sulfuric acid aerosols are included and their effects on O{sub 3}, NO{sub x}, Cl{sub x}, HCl, N{sub 2}O{sub 5}, ClONO{sub 2} are calculated.

Kinnison, D.E.; Wuebbles, D.J.

1992-07-05T23:59:59.000Z

375

Development and validation of nondestructive inspection techniques for composite doubler repairs on commercial aircraft  

SciTech Connect

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. In order for the use of composite doublers to achieve widespread use in the civil aviation industry, it is imperative that methods be developed which can quickly and reliably assess the integrity of the doubler. In this study, a specific composite application was chosen on an L-1011 aircraft in order to focus the tasks on application and operation issues. Primary among inspection requirements for these doublers is the identification of disbonds, between the composite laminate and aluminum parent material, and delaminations in the composite laminate. Surveillance of cracks or corrosion in the parent aluminum material beneath the doubler is also a concern. No single nondestructive inspection (NDI) method can inspect for every flaw type, therefore it is important to be aware of available NDI techniques and to properly address their capabilities and limitations. A series of NDI tests were conducted on laboratory test structures and on full-scale aircraft fuselage sections. Specific challenges, unique to bonded composite doubler applications, were highlighted. An array of conventional and advanced NDI techniques were evaluated. Flaw detection sensitivity studies were conducted on applicable eddy current, ultrasonic, X-ray and thermography based devices. The application of these NDI techniques to composite doublers and the results from test specimens, which were loaded to provide a changing flaw profile, are presented in this report. It was found that a team of these techniques can identify flaws in composite doubler installations well before they reach critical size.

Roach, D.; Walkington, P.

1998-05-01T23:59:59.000Z

376

Realistic Probability Estimates For Destructive Overpressure Events In Heated Center Wing Tanks Of Commercial Jet Aircraft  

SciTech Connect

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.

Alvares, N; Lambert, H

2007-02-07T23:59:59.000Z

377

Ozone levels in passenger cabins of commercial aircraft on North American  

NLE Websites -- All DOE Office Websites (Extended Search)

Ozone levels in passenger cabins of commercial aircraft on North American Ozone levels in passenger cabins of commercial aircraft on North American and transoceanic routes Title Ozone levels in passenger cabins of commercial aircraft on North American and transoceanic routes Publication Type Journal Article Year of Publication 2008 Authors Bhangar, Seema, Shannon Cowlin, Brett C. Singer, Richard G. Sextro, and William W. Nazaroff Journal Environmental Science and Technology Volume 42 Issue 11 Pagination 3938-43 Abstract Ozone levels in airplane cabins, and factors that influence them, were studied on northern hemisphere commercial passenger flights on domestic U.S., transatlantic, and transpacific routes. Real-time data from 76 flights were collected in 2006-2007 with a battery-powered UV photometric monitor. Sample mean ozone level, peak-hour ozone level, and flight-integrated ozone exposures were highly variable across domestic segments (N = 68), with ranges of 100 ppbv) ozone levels on domestic flights were associated with winter-spring storms that are linked to enhanced exchange between the lower stratosphere and the upper troposphere.

378

Sensitivity study of global ozone to NO/sub x/ emission from aircraft  

Science Conference Proceedings (OSTI)

There recently has been renewed interest in the development of faster and more efficient aircraft for intercontinental passenger flights. Such aircraft would probably spend a large fraction of their flight time in the stratosphere, perhaps as high as 35 km. As a natural progression from studies that were done in the early 1970s, this study reinvestigates the sensitivity of stratospheric ozone to NO/sub x/ emissions based on current understanding of atmospheric chemical and physical processes. The LLNL one-dimensional and new two-dimensional chemical-radiative-transport models of the troposphere and stratosphere are used in this investigation. The two-dimensional model provides latitudinal, altitudinal, and seasonal resolution; and the computationally faster one-dimensional model is used for sensitivity studies. Because of uncertainties in possible future emissions, it is necessary to examine the model sensitivity to a wide range in magnitude, altitude, and latitude of assumed NO/sub x/ emissions. As an initial study, the models are used in simulation of a typical scenario from the CIAP era, and results are compared with those of a published two-dimensional model, which includes some three- dimensional features. This investigation lays the groundwork for future studies, including different background amounts of ClX and for other aircraft emission scenarios. 12 refs., 3 figs., 1 tab.

Kinnison, D.; Johnston, H.; Wuebbles, D.J.

1988-08-01T23:59:59.000Z

379

Hyperfine Structure eind Exchange Narrowing^ C. H. Townes* and J. Turkevich**  

NLE Websites -- All DOE Office Websites (Extended Search)

structure eind Exc structure eind Exc of Paramagnetic Resonance Hyperfine Structure eind Exchange Narrowing^ C. H. Townes* and J. Turkevich** Brookhaven NationaJ. Laboratory The free radical a., a-diphenyl p-picryl hydrazyl, {C^E^)^-liC^E^ (NO-)^* shows the strongest and narrowest electronic paramagnetic resonance absorption so far reported. This resonance was observed by its effect on the transmission of microwaves (frequency approxi- mately 2l4-,000 m.c.) through a TEQ, cavity with a small amount of the free radical placed approximately on the axis of the cavity. The microwave frequency was tuned to give maximum transmission throxigh the cavity while the cavity was in place between the pole pieces of an electromagnet. With an amoxmt of the free radical as small as 2 mg.

380

Spectral Linewidth Narrowing and Tunable Two-Color Laser Operation of Two Diode Laser Arrays  

SciTech Connect

We propose and implement a common external cavity to narrow spectral linewidth of two broad-area laser diode arrays (LDAs) and align their center wavelengths. The locked center wavelength of two LDAs can be tuned in the range of {approx}10 nm by tuning the tilted angle of the diffraction grating. The output beams of two LDAs are spatially overlapped through the polarization beam splitter of the common external cavity, and the total output power equals the power of two LDAs. The center wavelength of each LDA can be independently tuned by shifting the corresponding fast-axis collimation lens. As a result, the high-power two-color LDA operation is demonstrated with the tunable wavelength difference of up to 2 nm ({approx}1 THz).

Liu, Bo [ORNL; Braiman, Yehuda [ORNL

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Emergent dimensional reduction of the spin sector in a model for narrow-band manganites  

SciTech Connect

The widely used double-exchange model for manganites is shown to support various striped phases at filling fractions 1/n (n = 3, 4, 5, . . .), in the previously unexplored regime of narrow bandwidth and small Jahn-Teller coupling. Working in two dimensions, our main result is that these stripes can be individually spin flipped without a physically relevant change in the energy, i.e., we find a large ground-state manifold with nearly degenerate energies. The two-dimensional spin system thus displays an unexpected dynamically generated dimensional reduction into decoupled one-dimensional stripes, even though the electronic states remain two dimensional. Relations of our results with recent literature addressing compass models in quantum computing are discussed.

Liang, Shuhua [ORNL; Daghofer, Maria [ORNL; Dong, Shuai [Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing; Sen, Cengiz [ORNL; Dagotto, Elbio R [ORNL

2011-01-01T23:59:59.000Z

382

Complex Plasmas in Narrow Channels: Impact of Confinement on the Local Order  

Science Conference Proceedings (OSTI)

Two-dimensional (2D) and three-dimensional (3D) quasi-equilibrium configurations of a complex (dusty) plasma in narrow channels are investigated using the molecular dynamics simulations for various confining potentials (confinements). The dynamics of the microparticles is described within the framework of a Langevin thermostat with allowance for the pair interaction between charged particles, which is described by a screened Coulomb potential (Yukawa potential). Two types of confinement: the parabolic electrostatic potential and hard elastic wall are considered. It is shown that the confinement strongly affects the crystallization and the local order of the microparticles in the system under consideration; in particular, the appearance of a new quasicrystalline phase induced by the hard wall confinement is revealed in 3D case.

Klumov, B. A. [Max-Planck-Institut fuer Extraterrestrische Physik, D-85740 Garching (Germany)

2008-10-15T23:59:59.000Z

383

Conjectured explanation for room-temperature superconductivity in narrow channels in oxidized polypropylene  

SciTech Connect

Two groups of scientists have observed conductivity at least five orders of magnitude higher than that of copper at room temperature in narrow channels perpendicular to surfaces of films in oxidized polypropylene. For pulsed currents, this conductivity starts at a minimum value of applied current, and is destroyed at a current of about 30-60 times this value. Because of the existence of an upper critical current and of the observation that electronic thermal conductivity is negligible in the channels, it is thought that the channels are superconducting. A study is made of the hypothesis that these results are due to enhanced pairing, as first suggested by Parameter, when the drift velocity of current carriers becomes close to the velocity of sound or, in work by Hone and by the present author, to an appropriate phase velocity of optical phonons. Such enhancements can be expected to be larger in quasi-one-dimensional systems. 10 refs.

Eagles, D.M. (NASA Marshall Space Flight Center, Huntsville, AL (United States))

1994-06-01T23:59:59.000Z

384

Dynamic Monte Carlo simulation of coupled transport through a narrow multiply-occupied pore  

E-Print Network (OSTI)

Dynamic Monte Carlo simulations are used to study coupled transport (co-transport) through sub-nanometer-diameter pores. In this classic Hodgkin-Keynes mechanism, an ion species uses the large flux of an abundant ion species to move against its concentration gradient. The efficiency of co-transport is examined for various pore parameters so that synthetic nanopores can be engineered to maximize this effect. In general, the pore must be narrow enough that ions cannot pass each other and the charge of the pore large enough to attract many ions so that they exchange momentum. Co-transport efficiency increases as pore length increases, but even very short pores exhibit co-transport, in contradiction to the usual perception that long pores are necessary. The parameter ranges where co-transport occurs is consistent with current and near-future synthetic nanopore geometry parameters, suggesting that co-transport of ions may be a new application of nanopores.

Dezs? Boda; va Csnyi; Dirk Gillespie; Tams Kristf

2013-10-08T23:59:59.000Z

385

Water vapor transmittance models for narrow bands in the 13 to 19. mu. m spectral region  

Science Conference Proceedings (OSTI)

The purpose of this report is to document the development of water vapor transmittance models for narrow bands (satellite sensor channels) in the 13 to 19 ..mu..m spectral region. The models are the result of research efforts of the author in 1971-1972 while on active duty with the US Air Force at the Air Force Global Weather Central (AFGWC). The models were developed for application in studies involving a temperature profiling sensor system carried aboard the satellites of the Defense Meteorological Satellite Program (DMSP), formerly DAPP. Recently, (Lovill et al., 1978; Luther et al., 1981) the models were implemented for studies concerned with methodologies to retrieve total atmospheric column ozone from measurements of newer DMSP Block 5D series satellite sensors with similar channels (see Nichols, 1975).

Weichel, R.L.

1983-10-01T23:59:59.000Z

386

Narrow linewidth picosecond pulsed laser with mega-watt peak power at UV wavelength  

Science Conference Proceedings (OSTI)

We demonstrate a master oscillator power amplifier (MOPA) burst mode laser system to generate 66 ps/402.5 MHz pulses with mega-watt peak power at 355 nm. The seed laser is based on a direct electro-optic modulation of a fiber laser output. A very high extinction ratio (45 dB) has been achieved by using an adaptive bias control. The multi-stage Nd:YAG amplifier system allows a uniformly temporal shaping of macropulses with tunable pulse duration. The light output form the amplifier is converted to 355 nm and over 1 MW UV peak power is obtained when the laser is operating in a 5- s/10-Hz macropulse mode. The laser output has a transform limited spectrum bandwidth with a very narrow linewidth of individual laser mode. The immediate application of the laser system is the laser assisted hydrogen ion beam stripping for the Spallation Neutron Source (SNS).

Liu, Yun [ORNL; Huang, Chunning [ORNL; Deibele, Craig Edmond [ORNL

2013-01-01T23:59:59.000Z

387

Catalyzed Water Oxidation by Solar Irradiation of Band-Gap-Narrowed Semiconductors (Part 2. Overview).  

DOE Green Energy (OSTI)

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.

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

2008-03-18T23:59:59.000Z

388

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

DOE Green Energy (OSTI)

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.

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

2008-03-18T23:59:59.000Z

389

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

Science Conference Proceedings (OSTI)

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.

Suh, Myungkoo

1995-12-06T23:59:59.000Z

390

Investigation of a Sodium Vapor Compressor Jet for Nuclear Propulsion of Aircraft  

SciTech Connect

?Analysis indicates that, in order to achieve supersonic flight with nuclear powered aircraft, a reactor -power plant combination capable of operating at temperatures considerably in excess of current practice must be developed. It is pointed out that there exist two general avenues of approach toward the goal of attaining high temperature reactors and power plants. The first approach involves the continuation and augmentation of research along the lines pursued by the conventional turbo-jet engine manufacturer, namely a search for material coatings or materials that will retain structural strength in high temperature oxidizing atmospheres. The second approach seeks to take advantage of the peculiar characteristics of the compressor-jet engine that permit the operation of the high temperature components in a non-oxidizing atmosphere. The results of a preliminary design study of a supersonic aircraft powered by a high temperature sodium, liquid vapor compressor -jet engine are summarized. The analysis considered, in as much detail as was warranted by the limited experimental information available, the characteristics of the reactor, power plant and airframe involved in determining performance. This study has been conducted for the purpose of guiding future, long -t e r rn , research work along the lines of high temperature reactors and power plants for aircraft propulsion. The sodium vapor compressor -jet is not presented as an engine that is presently considered feasible nor is any attempt made to establish a time table for its development. ?The present status of reactor -power plant combinations of the type discussed in this report is such that the configurations presented and the thermodynamic requirements set forth are highly c onj ectural. However, in light of the promising results thus far obtained from very limited experimentation in the field of high temperature materials not subject to oxidizing atmospheres, it appears worthwhile to continue a research effort along these lines in the expectation of making high temperature, high performance aircraft a reality. This report is based upon studies conducted for the Atomic Energy Commission under Contract AT-40-l-GEN-1064. These studies were concluded on September 1, 1951, and were informally made available to the Aircraft Nuclear Propulsion Group at ORNL at that time.

Schwartz, H.

1953-06-25T23:59:59.000Z

391

BCS-BEC crossover in atomic Fermi gases with a narrow resonance  

SciTech Connect

We determine the effects on the BCS-BEC crossover of the energy dependence of the effective two-body interaction, which at low energies is determined by the effective range. To describe interactions with an effective range of either sign, we consider a single-channel model with a two-body interaction having an attractive square well and a repulsive square barrier. We investigate the two-body scattering properties of the model, and then solve the Eagles-Leggett equations for the zero temperature crossover, determining the momentum dependent gap and the chemical potential self-consistently. From this we investigate the dependence of the crossover on the effective range of the interaction.

Jensen, L. M. [NORDITA, Blegdamsvej 17, DK-2100, Copenhagen O (Denmark); Department of Physics, Nanoscience Center, University of Jyvaeskylae, P.O. Box 35, FIN-40014 Finland (Finland); Department of Theoretical Physics, Umeaa University, Umeaa, 901 87 (Sweden); Nilsen, H. M. [Center for Mathematics for Applications, P.O. Box 1053, Blindern, NO-0316, Oslo Norway (Norway); Watanabe, Gentaro [NORDITA, Blegdamsvej 17, DK-2100, Copenhagen O (Denmark); Institute of Chemical and Physical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)

2006-10-15T23:59:59.000Z

392

Measurements of aerosol properties from aircraft, satellite and ground-based remote sensing: a case-study from the Dust and Biomass-burning Experiment (DABEX)  

DOE Green Energy (OSTI)

Measurements of aerosol properties from aircraft, satellite and ground-based remote sensing: A case study from the Dust and Biomass burning Experiment (DABEX)

Johnson, B. T.; Christopher, S.; Haywood, J.; Osborne, S. R.; McFarlane, Sally; Hsu, C.; Salustro, C.; Kahn, Ralph

2009-04-28T23:59:59.000Z

393

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)

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 ...

Richardson, Kristina L. (Kristina Lynn)

2009-01-01T23:59:59.000Z

394

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

SciTech Connect

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.

Zhengqing, Gan

2010-05-16T23:59:59.000Z

395

Peculiarly Narrow SED of GRB 090926B with MAXI and Fermi/GBM  

E-Print Network (OSTI)

The monitor of all-sky X-ray image (MAXI) Gas Slit Camera (GSC) on the International Space Station (ISS) detected a gamma-ray burst (GRB) on 2009, September 26, GRB\\,090926B. This GRB had extremely hard spectra in the X-ray energy range. Joint spectral fitting with the Gamma-ray Burst Monitor on the Fermi Gamma-ray Space Telescope shows that this burst has peculiarly narrow spectral energy distribution and is represented by Comptonized blackbody model. This spectrum can be interpreted as photospheric emission from the low baryon-load GRB fireball. Calculating the parameter of fireball, we found the size of the base of the flow $r_0 = (4.3 \\pm 0.9) \\times 10^{9} \\, Y^{\\prime \\, -3/2}$ cm and Lorentz factor of the plasma $\\Gamma = (110 \\pm 10) \\, Y^{\\prime \\, 1/4}$, where $Y^{\\prime}$ is a ratio between the total fireball energy and the energy in the blackbody component of the gamma-ray emission. This $r_0$ is factor of a few larger, and the Lorentz factor of 110 is smaller by also factor of a few than other bu...

Serino, Motoko; Kawai, Nobuyuki; Nakagawa, Yujin E; Ueda, Yoshihiro; Mihara, Tatehiro; Nakahira, Satoshi; Eguchi, Satoshi; Hiroi, Kazuo; Ishikawa, Masaki; Isobe, Naoki; Kimura, Masashi; Kitayama, Hiroki; Kohama, Mitsuhiro; Matsumura, Takanori; Matsuoka, Masaru; Morii, Mikio; Nakajima, Motoki; Negoro, Hitoshi; Shidatsu, Megumi; Sootome, Tetsuya; Sugimori, Kousuke; Sugizaki, Mutsumi; Suwa, Fumitoshi; Toizumi, Takahiro; Tomida, Hiroshi; Tsuboi, Yohko; Tsunemi, Hiroshi; Ueno, Shiro; Usui, Ryuichi; Yamamoto, Takayuki; Yamaoka, Kazutaka; Yamauchi, Makoto; Yamazaki, Kyohei

2011-01-01T23:59:59.000Z

396

Narrow Radiative Recombination Continua: A Signature of Ions Crossing the Contact Discontinuity of Astrophysical Shocks  

E-Print Network (OSTI)

X-rays from planetary nebulae (PNs) are believed to originate from a shock driven into the fast stellar wind (v ~ 1000 km/s) as it collides with an earlier circumstellar slow wind (v ~ 10 km/s). In theory, the shocked fast wind (hot bubble) and the ambient cold nebula can remain separated by magnetic fields along a surface referred to as the contact discontinuity (CD) that inhibits diffusion and heat conduction. The CD region is extremely difficult to probe directly owing to its small size and faint emission. This has largely left the study of CDs, stellar-shocks, and the associated micro-physics in the realm of theory. This paper presents spectroscopic evidence for ions from the hot bubble (kT ~ 100 eV) crossing the CD and penetrating the cold nebular gas (kT ~ 1 eV). Specifically, a narrow radiative recombination continuum (RRC) emission feature is identified in the high resolution X-ray spectrum of the PN BD+30 3639 indicating bare C VII ions are recombining with cool electrons at kT_e=1.7+-1.3 eV. An uppe...

Nordon, Raanan; Soker, Noam; Kastner, Joel H; Yu, Young Sam

2009-01-01T23:59:59.000Z

397

THE PHYSICAL CONDITIONS OF THE INTRINSIC N V NARROW ABSORPTION LINE SYSTEMS OF THREE QUASARS  

SciTech Connect

We employ detailed photoionization models to infer the physical conditions of intrinsic narrow absorption line systems found in high-resolution spectra of three quasars at z = 2.6-3.0. We focus on a family of intrinsic absorbers characterized by N V lines that are strong relative to the Ly{alpha} lines. The inferred physical conditions are similar for the three intrinsic N V absorbers, with metallicities greater than 10 times the solar value (assuming a solar abundance pattern), and with high ionization parameters (log U {approx} 0). Thus, we conclude that the unusual strength of the N V lines results from a combination of partial coverage, a high ionization state, and high metallicity. We consider whether dilution of the absorption lines by flux from the broad emission line region can lead us to overestimate the metallicities and we find that this is an unlikely possibility. The high abundances that we infer are not surprising in the context of scenarios in which metal enrichment takes place very early on in massive galaxies. We estimate that the mass outflow rate in the absorbing gas (which is likely to have a filamentary structure) is less than a few M{sub sun} yr{sup -1} under the most optimistic assumptions, although it may be embedded in a much hotter, more massive outflow.

Wu Jian; Charlton, Jane C.; Misawa, Toru; Eracleous, Michael [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Ganguly, Rajib, E-mail: jwu@astro.psu.ed, E-mail: misawatr@shinshu-u.ac.j [Department of Computer Science, Engineering, and Physics, University of Michigan-Flint, 213 Murchie Science Building, 303 Kearsley Street, Flint, MI 48502 (United States)

2010-10-20T23:59:59.000Z

398

Compact Probe for Power Detection from the Narrow Side of the Waveguide  

SciTech Connect

Phased array antennas with high directivity have a variety of applications. One of their applications is in RF heating for magnetically confined plasma fusion research. Among these RF heating schemes, waveguide arrays with careful phase control on each waveguide can act as a phased array antenna to deliver megawatts of power for heating fusion plasmas in the lower-hybrid range of frequencies (1 GHz-10 GHz). In order to achieve compactness, it is common to stack reduced height waveguide together to form the waveguide array. As long as the delivered power does not cause arcing in the waveguide, the waveguide height can be quite small. Due to this confined space in a stack of reduced height waveguides, power detection of the incident and reflected wave in the reduced height waveguide is extremely difficult. A new compact probe, which employs current loops, to monitor the incident and reflected wave from the narrow side of the reduced height waveguide has been developed. Its theory and performance will be reported in this paper.

C.C. Kung; S. Bernabei; J. Gumbas; N. Greenough; E. Fredd; J.R. Wilson; J. Hosea

2004-05-07T23:59:59.000Z

399

Comparison of Narrow Bipolar Events with Ordinary Lightning as Proxies for the Microwave-Radiometry Ice-Scattering Signature  

Science Conference Proceedings (OSTI)

The narrow bipolar event (NBE) is a unique lightning discharge that has a short (10 ?s) overall duration, lacks a prior leader phase, and produces too little light output to be visible by optical lightning detectors on satellites. NBEs thus have ...

Abram R. Jacobson; William Boeck; Christopher Jeffery

2007-04-01T23:59:59.000Z

400

KILOPARSEC-SCALE RADIO STRUCTURES IN NARROW-LINE SEYFERT 1 GALAXIES  

SciTech Connect

We report the finding of kiloparsec (kpc)-scale radio structures in three radio-loud narrow-line Seyfert 1 (NLS1) galaxies from the Faint Images of the Radio Sky at Twenty-centimeters of the Very Large Array, which increases the number of known radio-loud NLS1s with kpc-scale structures to six, including two {gamma}-ray-emitting NLS1s (PMN J0948+0022 and 1H 0323+342) detected by the Fermi Gamma-ray Space Telescope. The detection rate of extended radio emissions in NLS1s is lower than that in broad-line active galactic nuclei (AGNs) with a statistical significance. We found both core-dominated (blazar-like) and lobe-dominated (radio-galaxy-like) radio structures in these six NLS1s, which can be understood in the framework of the unified scheme of radio-loud AGNs that considers radio galaxies as non-beamed parent populations of blazars. Five of the six NLS1s have (1) extended radio luminosities suggesting jet kinetic powers of {approx}> 10{sup 44} erg s{sup -1}, which is sufficient to make jets escape from hosts' dense environments; (2) black holes of {approx}> 10{sup 7} M {sub Sun }, which can generate the necessary jet powers from near-Eddington mass accretion; and (3) two-sided radio structures at kpc scales, requiring expansion rates of {approx}0.01c-0.3c and kinematic ages of {approx}> 10{sup 7} years. On the other hand, most typical NLS1s would be driven by black holes of {approx}< 10{sup 7} M {sub Sun} in a limited lifetime of {approx}10{sup 7} years. Hence, the kpc-scale radio structures may originate in a small window of opportunity during the final stage of the NLS1 phase just before growing into broad-line AGNs.

Doi, Akihiro; Kino, Motoki [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuou-ku, Sagamihara, Kanagawa 252-5210 (Japan); Nagira, Hiroshi [Graduate School of Science and Engineering, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi 753-8512 (Japan); Kawakatu, Nozomu [Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571 (Japan); Nagai, Hiroshi [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Asada, Keiichi, E-mail: akihiro.doi@vsop.isas.jaxa.jp [Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan (China)

2012-11-20T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Very narrow band model calculations of atmospheric fluxes and cooling rates  

SciTech Connect

A new very narrow band model (VNBM) approach has been developed and incorporated into the MODTRAN atmospheric transmittance-radiance code. The VNBM includes a computational spectral resolution of 1 cm{sup {minus}1}, a single-line Voigt equivalent width formalism that is based on the Rodgers-Williams approximation and accounts for the finite spectral width of the interval, explicit consideration of line tails, a statistical line overlap correction, a new sublayer integration approach that treats the effect of the sublayer temperature gradient on the path radiance, and the Curtis-Godson (CG) approximation for inhomogeneous paths. A modified procedure for determining the line density parameter 1/d is introduced, which reduces its magnitude. This results in a partial correction of the VNBM tendency to overestimate the interval equivalent widths. The standard two parameter CG approximation is used for H{sub 2}O and CO{sub 2}, while the Goody three parameter CG approximation is used for O{sub 3}. Atmospheric flux and cooling rate predictions using a research version of MODTRAN, MODR, are presented for H{sub 2}O (with and without the continuum), CO{sub 2}, and O{sub 3} for several model atmospheres. The effect of doubling the CO{sub 2} concentration is also considered. These calculations are compared to line-by-line (LBL) model calculations using the AER, GLA, GFDL, and GISS codes. The MODR predictions fall within the spread of the LBL results. The effects of decreasing the band model spectral resolution are illustrated using CO{sub 2} cooling rate and flux calculations. 36 refs., 18 figs., 1 tab.

Bernstein, L.S.; Berk, A.; Acharya, P.K.; Robertson, D.C. [Spectral Sciences, Inc., Burlington, MA (United States)] [and others] [Spectral Sciences, Inc., Burlington, MA (United States); and others

1996-10-15T23:59:59.000Z

402

Body Area Networks: A Survey  

Science Conference Proceedings (OSTI)

Advances in wireless communication technologies, such as wearable and implantable biosensors, along with recent developments in the embedded computing area are enabling the design, development, and implementation of body area networks. This class of ... Keywords: body area networks, survey, wireless sensor networks

Min Chen; Sergio Gonzalez; Athanasios Vasilakos; Huasong Cao; Victor C. Leung

2011-04-01T23:59:59.000Z

403

Using Narrow and Wide Field of View Instruments to Evaluate Longwave Parameterizations for Fair Weather Cumulus Cloud Fields  

NLE Websites -- All DOE Office Websites (Extended Search)

Using Narrow and Wide Field of View Instruments to Using Narrow and Wide Field of View Instruments to Evaluate Longwave Parameterizations for Fair Weather Cumulus Cloud Fields E. E. Takara and R. G. Ellingson Department of Meteorology Florida State University Tallahassee, Florida Introduction Full blown three-dimensional (3D) radiation calculations for broken cloud fields consume too much time and computing resources to be included in climate models. The 3D effects can be approximated by effective cloud fractions which reduce the three-dimensional calculation to an average of plane parallel solutions - a much easier problem. For broken cloud conditions, the longwave flux (F) can be written as the weighted average of clear and overcast fluxes: overcast e clear e F N )F N 1 ( F (1) F clear is the clear-sky flux; the flux that would occur if the broken cloud field was removed. F

404

Three orders of magnitude cavity-linewidth narrowing by slow light in a rare-earth-ion-doped crystal cavity  

E-Print Network (OSTI)

Three orders of magnitude cavity-linewidth narrowing in a rare-earth-ion-doped crystal cavity, induced by strong intra-cavity dispersion caused by off-resonant interaction with dopant ions is demonstrated. The strong dispersion is created by semi-permanent but rapidly reprogrammable changes of the rare earth absorption profiles using optical pumping techniques. Several cavity modes are shown within the spectral transmission window. Potential applications are discussed.

Sabooni, Mahmood; Rippe, Lars; Krll, Stefan

2013-01-01T23:59:59.000Z

405

An Aircraft Investigation of Mesoscale Convection over Lake Michigan during the 10 January 1984 Cold Air Outbreak  

Science Conference Proceedings (OSTI)

Surface, upper air, aircraft and satellite observations during the Lake-Effect Snow Studies (LESS) field program have been examined to study the properties of a cloud-topped boundary layer (CTBL) that formed in response to a northerly flow of ...

Ernest M. Agee; Steven R. Gilbert

1989-07-01T23:59:59.000Z

406

Research Aircraft Observations of the Mean and Turbulent Structure of a Low-Level Jet Accompanying a Strong Storm  

Science Conference Proceedings (OSTI)

A NOAA P-3 research aircraft collected measurements in a storm off of the U.S. West Coast that featured a low-level jet with wind speeds approaching 50 m s?1. These measurements have been used to document mean and turbulent boundary layer ...

Nicholas A. Bond; Bernard A. Walter

2002-12-01T23:59:59.000Z

407

A Bayesian Approach to Upscaling and Downscaling of Aircraft Measurements of Ice Particle Counts and Size Distributions  

Science Conference Proceedings (OSTI)

This study addresses the issue of how to upscale cloud-sized in situ measurements of ice to yield realistic simulations of ice clouds for a variety of modeling studies. Aircraft measurements of ice particle counts along a 79 km zigzag path were ...

A. R. Jameson; A. J. Heymsfield

408

Aircraft Microwave Observations and Simulations of Deep Convection from 18 to 183 GHz. Part II: Model Results  

Science Conference Proceedings (OSTI)

In Part II of the 29 June 1986 case study, a radiative transfer model is used to simulate the aircraft multichannel microwave brightness temperatures presented in Part I and to study the convective storm structure. Ground-based radar data are ...

Hwa-Young M. Yeh; N. Prasad; Robert A. Mack; Robert F. Adler

1990-06-01T23:59:59.000Z

409

The role of the personal computer in the design and development of advanced life-support equipment for tactical aircraft  

Science Conference Proceedings (OSTI)

Pilots of tactical aircraft are exposed to high accelerative forces. Acceleration in the headward direction (+Gz) will decrease blood flow to the head, causing changes in the visual field and/or loss of consciousness. G-protective life-support systems ...

Marty Pecaric

1995-11-01T23:59:59.000Z

410

Estimation of Dissipative Heating Using Low-Level In Situ Aircraft Observations in the Hurricane Boundary Layer  

Science Conference Proceedings (OSTI)

Data collected in the low-level atmospheric boundary layer in five hurricanes by NOAA research aircraft are analyzed to measure turbulence with scales small enough to retrieve the rate of dissipation. A total of 49 flux runs suitable for analysis ...

Jun A. Zhang

2010-06-01T23:59:59.000Z

411

An Aircraft Study of Mesoscale Surface Wind Patterns and Associated Meteorological Conditions over Cape St. Francis, South Africa  

Science Conference Proceedings (OSTI)

Aircraft surveys have been conducted to assess the mesoscale pattern of wind and weather over Cape Saint Francis, South Africa, on the southern tip of the African continent. Ten surveys were flown at a level of 100 m above ground during November ...

Mark R. Jury; Roseanne D. Diab; Mark Schormann

1993-10-01T23:59:59.000Z

412

The development of electromechanical actuators (EMAs) is the key technology to build an all-electric aircraft. One of the  

E-Print Network (OSTI)

on military aircraft poses a challenge in the design of the whole driving train, from the motor Element Analysis (FEA) is widely used in today's mechanical, electronic and aerodynamic designs. However. To address thermal management under limited cooling options, accurate spatial and temporal information

Wu, Shin-Tson

413

A Bayesian Approach to Upscaling and Downscaling of Aircraft Measurements of Ice Particle Counts and Size Distributions  

Science Conference Proceedings (OSTI)

This study addresses the issue of how to upscale cloud-sized in situ measurements of ice to yield realistic simulations of ice clouds for a variety of modeling studies. Aircraft measurements of ice particle counts along a 79-km zigzag path were ...

A. R. Jameson; A. J. Heymsfield

2013-09-01T23:59:59.000Z

414

Dynamic Heart?Body Simulator  

Science Conference Proceedings (OSTI)

A high?speed electronic analog computer is described which is a useful research tool in the analysis of body?surface voltages produced by a fixed?position

Ernest Frank

1954-01-01T23:59:59.000Z

415

DOE-STD-3014-96; DOE Standard Accident Analysis For Aircraft Crash Into Hazardous Facilities  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE STANDARD DOE STANDARD October 1 996 Reaffirmation May 2006 ACCIDENT CRASH INTO ANALYSIS HAZARDOUS FACILITIES U.S. Department of Energy Washington, DC 20585 AREA SAFT DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. FOR AIRCRAFT This document has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831; (423) 576-8401. Available to the public from the U.S. Department of Commerce, Technology Administration, National Technical Information Service, Springfield, VA 22161; (703) 487-4650. Order No. DE97000162 DOE-STD-3014-96 iii TABLE OF CONTENTS PARAGRAPH PAGE FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

416

Development and testing of the Perseus proof-of-concept aircraft. Final report  

DOE Green Energy (OSTI)

Many areas of global climate change research could benefit from a flexible, affordable, and near-term platform that could provide in situ measurements in the upper troposphere and lower stratosphere. To provide such a capability, the Perseus unmanned science research aircraft was proposed in 1989. As a first step toward the development of Perseus, a proof-of-concept (POC) demonstrator was constructed and tested during 1990 and 1991. The POC was a full scale Perseus airframe intended to validate the structural, aerodynamic, and flight control technologies for the Perseus within a total budget of about $1.5 million. Advanced propulsion systems needed for the operational Perseus were not covered in the POC program due to funding limitations. This report documents the design, development, and testing of the Perseus POC.

Langford, J.S. [Aurora Flight Sciences Corp., Manassas, VA (United States)

1993-02-26T23:59:59.000Z

417

Electrical Generation for More-Electric Aircraft Using Solid Oxide Fuel Cells  

Science Conference Proceedings (OSTI)

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.

Whyatt, Greg A.; Chick, Lawrence A.

2012-04-01T23:59:59.000Z

418

Hanford whole body counting manual  

SciTech Connect

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.

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

1990-06-01T23:59:59.000Z

419

METHOD OF MAKING REFRACTORY BODIES  

DOE Patents (OSTI)

A method is given for the manufacture of silicon carbide bodies that are characterized by high density, high purity, and superior resistance to oxidative deterioration. Dense silicon bodies are obtained by a process in which granular silicon carbide, a carbonizable material, and a carbonaceous material are mixed together, the mixture is shaped as desired, and then the shape is fired in the presence of more than the stoichiometric amount of silicon. The carbonizable material preferably includes a temporary binder that is set before the firing step to hold the mix in shape for firing.

Andersen, J.C.

1960-05-31T23:59:59.000Z

420

Investigation of mechanisms of multimode emission from double-heterostructure AlGaAs injection lasers with narrow stripe contacts  

SciTech Connect

An investigation was made of the spectral characteristics of planar stripe (contact width 6--8 ..mu..) lasers made of AlGaAs heterostructures. The steady-state emission spectrum could be of multimode type because of the high level of spontaneous emission in the lasing mode. The spectrum then became narrower on increase in the power and in the limit changed to the single-mode form. However, in the presence of self-modulation processes the multimode nature of the emission spectrum could be explained by a theory of transient effects and in this case the width of the spectrum increased on increase in the power.

Bessonov, Y.L.; Kurlenkov, S.S.; Morozov, V.N.; Sapozhnikov, S.M.; Thai, C.t.; Shidlovskii, V.R.

1985-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Observation of coherently enhanced tunable narrow-band terahertz transition radiation from a relativistic sub-picosecond electron bunch train  

SciTech Connect

We experimentally demonstrate the production of narrow-band ({delta}f/f{approx_equal}20% at f{approx_equal}0.5THz) transition radiation with tunable frequency over [0.37, 0.86] THz. The radiation is produced as a train of sub-picosecond relativistic electron bunches transits at the vacuum-aluminum interface of an aluminum converter screen. The bunch train is generated via a transverse-to-longitudinal phase space exchange technique. We also show a possible application of modulated beams to extend the dynamical range of a popular bunch length diagnostic technique based on the spectral analysis of coherent radiation.

Piot, P.; Maxwell, T. J. [Northern Illinois Center for Accelerator and Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115 (United States); Accelerator Physics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); Sun, Y.-E [Accelerator Physics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); Ruan, J.; Lumpkin, A. H.; Thurman-Keup, R. [Accelerator Division, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); Rihaoui, M. M. [Northern Illinois Center for Accelerator and Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115 (United States)

2011-06-27T23:59:59.000Z

422

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)

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 ...

Fuentes, Jose L., S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

423

Relative Short-Range Forecast Impact from Aircraft, Profiler, Radiosonde, VAD, GPS-PW, METAR, and Mesonet Observations via the RUC Hourly Assimilation Cycle  

Science Conference Proceedings (OSTI)

An assessment is presented on the relative forecast impact on the performance of a numerical weather prediction model from eight different observation data types: aircraft, profiler, radiosonde, velocity azimuth display (VAD), GPS-derived ...

Stanley G. Benjamin; Brian D. Jamison; William R. Moninger; Susan R. Sahm; Barry E. Schwartz; Thomas W. Schlatter

2010-04-01T23:59:59.000Z

424

SpaceTime Description of Nonstationary Trapped Lee Waves Using ST Radars, Aircraft, and Constant Volume Balloons during the PYREX Experiment  

Science Conference Proceedings (OSTI)

The third intensive observation period (IOP3) of PYREX was a case of strong lee waves generated by a southerly wind crossing the Pyrenees chain. Upstream radiosounds and measurements obtained by aircraft along the chain transect and by constant ...

J-L. Caccia; B. Benech; V. Klaus

1997-07-01T23:59:59.000Z

425

Small-Scale Motions Observed by Aircraft in the Tropical Lower Stratosphere: Evidence for Mixing and its Relationship to Large-Scale Flows  

Science Conference Proceedings (OSTI)

Measurments of temperature and ozone from instrumental aircraft in the tropical lower stratosphere show the presence of small-scale disturbances generated by 1) underlying cumulus convection and 2) Kelvin-Helmholtz instability. The disturbances ...

Leonhard Pfister; Walter Starr; Roger Craig; Max Loewenstein; Marion Legg

1986-12-01T23:59:59.000Z

426

Heat Budget Calculation in the Convective Boundary Layer on a 4 4 Vertical versus Time Grid from Aircraft and Surface Measurements  

Science Conference Proceedings (OSTI)

Aircraft, portable tower, and radiosonde measurements from 4 August 1989 (day 68) of the First International Satellite Land Surface Climatology Project (ISLCP) Field Experiment (FIFE), over fairly flat terrain in Kansas, are used for the ...

John C. Lukas

2000-09-01T23:59:59.000Z

427

Chemical Characterization of Aerosols on the East Coast of the United States Using Aircraft and Ground-Based Stations during the CLAMS Experiment  

Science Conference Proceedings (OSTI)

The Chesapeake Lighthouse and Aircraft Measurements for Satellites (CLAMS) experiment was carried out off the central East Coast of the United States in July 2001. During CLAMS, aerosol particle mass was measured at two ground stations and on the ...

Andra Dde Almeida Castanho; Paulo Artaxo; J. Vanderlei Martins; Peter V. Hobbs; Lorraine Remer; Marcia Yamasoe; Peter R. Colarco

2005-04-01T23:59:59.000Z

428

Structure and Evolution of the 22 February 1993 TOGA COARE Squall Line: Aircraft Observations of Precipitation, Circulation, and Surface Energy Fluxes  

Science Conference Proceedings (OSTI)

This study documents the precipitation and kinematic structure of a mature, eastward propagating, oceanic squall line system observed by instrumented aircraft during the Tropical Ocean Global Atmosphere Coupled OceanAtmosphere Response ...

David P. Jorgensen; Margaret A. LeMone; Stanley B. Trier

1997-08-01T23:59:59.000Z

429

Real-time upper-ocean temperature observations from aircraft during operational hurricane reconnaissance missions: AXBT Demonstration Project year one results  

Science Conference Proceedings (OSTI)

Thousands of aircraft observations of upper-ocean thermal structure have been obtained during hurricane and typhoon research field experiments in recent decades. The results from these experiments suggest a strong correlation between upper-ocean ...

Elizabeth R. Sanabia; Bradford S. Barrett; Peter G. Black; Sue Chen; James A. Cummings

430

Design and control of a semi-passive, heavy-duty paired mobile robot system with application to aircraft wing assembly  

E-Print Network (OSTI)

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 ...

Menon, Manas Chandran

2010-01-01T23:59:59.000Z

431

Impact on Hurricane Track and Intensity Forecasts of GPS Dropwindsonde Observations from the First-Season Flights of the NOAA Gulfstream-IV Jet Aircraft  

Science Conference Proceedings (OSTI)

In 1997, the Tropical Prediction Center (TPC) began operational Gulfstream-IV jet aircraft missions to improve the numerical guidance for hurricanes threatening the continental United States, Puerto Rico, and the Virgin Islands. During these ...

Sim D. Aberson; James L. Franklin

1999-03-01T23:59:59.000Z

432

Use of Distance-measuring Equipment (DME) for Correcting Errors in Position, Velocity, and Wind Measurements from Aircraft Inertial Navigation Systems  

Science Conference Proceedings (OSTI)

Aircraft distance-measuring-equipment (DME) data are used to update position, velocity, and wind measurements from inertial navigation systems (INS) measurements. Data from conventional single-channel DME sets, suitably calibrated, are shown to ...

Alfred R. Rodi; James C. Fankhauser; Robin L. Vaughan

1991-12-01T23:59:59.000Z

433

Analysis of Aircraft, Radiosonde, and Radar Observations in Cirrus Clouds Observed during FIRE II: The Interactions between Environmental Structure, Turbulence, and Cloud Microphysical Properties  

Science Conference Proceedings (OSTI)

Ways to determine the turbulence intensity and the horizontal variability in cirrus clouds have been investigated using First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment II aircraft, radiosonde, and radar data. ...

Samantha A. Smith; Anthony D. DelGenio

2001-03-01T23:59:59.000Z

434

Numerical Modeling of Sulfur and Nitrogen Chemistry in a Narrow Cold-Frontal Rainband: The Impact of Meteorological and Chemical Parameters  

Science Conference Proceedings (OSTI)

To better understand the impact of various meteorological and chemical parameters on chemical deposition from winter storms, the chemistry and microphysics of a narrow cold-frontal rainband and its associated stratiform region were examined with ...

Mary C. Barth

1994-07-01T23:59:59.000Z

435

The 12/13 January 1988 Narrow Cold-Frontal Rainband Observed during MFDP/FRONTS 87. Part I: Kinematics and Thermodynamics  

Science Conference Proceedings (OSTI)

The kinematic and thermodynamic structure of a narrow cold-frontal rainband (NCFR) observed during the EnglishFrenchGerman MFDP/FRONTS 87 experiment is presented. Radiosonde data indicated a very weak convective instability below 1500-m ...

Frank Roux; Virginie Marcal; Danile Hauser

1993-04-01T23:59:59.000Z

436

A Space-Filling Algorithm to Extrapolate Narrow-Swath Instantaneous TRMM Microwave Rain-Rate Estimates Using Thermal IR Imagery  

Science Conference Proceedings (OSTI)

A space-filling algorithm (SFA) based on 2D spectral estimation techniques was developed to extrapolate the spatial domain of the narrow-swath near-instantaneous rain-rate estimates from Tropical Rainfall Measuring Mission (TRMM) precipitation ...

Ana P. Barros; Kun Tao

2008-11-01T23:59:59.000Z

437

The Mesoscale and Microscale Structure and organization of Clouds and precipitation in Midlatitude Cyclones. Part V: The Substructure of Narrow Cold-Frontal Rainbands  

Science Conference Proceedings (OSTI)

The organization and structure of a narrow cold-frontal rainband (NCFR) on the small mesoscale and the microscale have been investigated through quantitative radar reflectivity, Doppler radar observations, airborne observations and surface ...

Peter V. Hobbs; P. Ola G. Persson

1982-02-01T23:59:59.000Z

438

body  

NLE Websites -- All DOE Office Websites (Extended Search)

9 9 JULY 1997 Control of Nitrogen Oxide Emissions: Selective Catalytic Reduction (SCR) TOPICAL REPORT NUMBER 9 A report on a project conducted jointly under a cooperative agreement between: The U.S. Department of Energy and Southern Company Services, Inc. JULY 1997 Control of Nitrogen Oxide Emissions: Selective Catalytic Reduction (SCR) Cover image: Photo of SCR Project at Plant Crist. Preparation and printing of this document conforms to the general funding provisions of a cooperative agreement between Southern Company Services and the U.S. Department of Energy. The funding contribution of the industrial participant permitted inclusion of multicolored artwork and photographs at no additional expense to the U.S. Government. Control of Nitrogen Oxide Emissions: Selective Catalytic Reduction (SCR)

439

Holder for rotating glass body  

DOE Patents (OSTI)

A device is provided for holding and centering a rotating glass body such as a rod or tube. The device includes a tubular tip holder which may be held in a lathe chuck. The device can utilize a variety of centering tips each adapted for a particular configuration, such as a glass O-ring joint or semi-ball joint.

Kolleck, Floyd W. (Clarendon Hills, IL)

1978-04-04T23:59:59.000Z

440

New Accreditation Program for Body Armor Testing ...  

Science Conference Proceedings (OSTI)

New Accreditation Program for Body Armor Testing Laboratories. From NIST Tech Beat: December 12, 2007. ...

2012-04-06T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Narrow groove gas tungsten arc welding of ASTM A508 Class 4 steel for improved toughness properties  

Science Conference Proceedings (OSTI)

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.

Penik, M.A. Jr. [Rensselaer Polytechnic Inst., Troy, NY (United States)

1997-04-01T23:59:59.000Z

442

Multiwavelength Monitoring of the Enigmatic Narrow-Line Seyfert 1 PMN J0948 0022 in March-July 2009  

SciTech Connect

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.

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

443

HST STIS Ultraviolet Spectral Evidence of Outflow in Extreme Narrow-line Seyfert 1 Galaxies: II. Modeling and Interpretation  

E-Print Network (OSTI)

(Abridged) This is the second of two papers on the UV emission-line properties of Narrow-line Seyfert 1 Galaxies (NLS1s). In the first paper, HST STIS spectra from two extreme NLS1s, IRAS 13224-3809 and 1H 0707-495, were analyzed in detail. In this paper, we present modeling intended to explore the physical conditions of the line-emitting gas. Photoionization modeling using Cloudy was conducted for the broad, blueshifted wind component and the narrow, symmetric, rest-wavelength-centered disk component of the lines separately. For the wind component, a broad range of ionizing flux, column density, density, covering fraction, and a limited range of continuum shape and metallicity were explored. A figure of merit was used to quantitatively evaluate the results of the simulations. We found three minima of the figure of merit in parameter space. We favor the solution characterized by an X-ray weak continuum, metallicity enhanced by a factor of 5 and nitrogen enhanced by a factor of 10 over solar, a small column de...

Leighly, K M

2004-01-01T23:59:59.000Z

444

HST STIS Ultraviolet Spectral Evidence for Outflow in Extreme Narrow-line Seyfert 1 Galaxies: I. Data and Analysis  

E-Print Network (OSTI)

We present HST STIS observations of two extreme NLS1s, IRAS 13224-3809 and 1H 0707-495. The spectra are characterized by very blue continua, broad, strongly blueshifted high-ionization lines (including \\ion{C}{4} and \\ion{N}{5}), and narrow, symmetric intermediate- (including \\ion{C}{3}], \\ion{Si}{3}], \\ion{Al}{3}) and low-ionization (e.g., \\ion{Mg}{2}) lines centered at their rest wavelengths. The emission-line profiles suggest that the high-ionization lines are produced in a wind, and the intermediate- and low-ionization lines are produced in low-velocity gas associated with the accretion disk or base of the wind. In this paper, we present the analysis of the spectra from these two objects; in a companion paper we present photoionization analysis and a toy dynamical model for the wind. The highly asymmetric profile of \\ion{C}{4} suggests that it is dominated by emission from the wind, so we develop a template for the wind from the \\ion{C}{4} line. We model the bright emission lines in the spectra using a combination of this template, and a narrow, symmetric line centered at the rest wavelength. We also analyzed a comparison sample of HST spectra from 14 additional NLS1s, and construct a correlation matrix of emission line and continuum properties. A number of strong correlations were observed, including several involving the asymmetry of the \\ion{C}{4} line.

Karen M. Leighly; John R. Moore

2004-02-19T23:59:59.000Z

445

Essential Body of Knowledge (EBK) October 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Essential Body of Knowledge (EBK) Essential Body of Knowledge (EBK) October 2011 1 U.S. DEPARTMENT OF ENERGY Essential Body of Knowledge (EBK) A Competency and Functional Framework For Cyber Security Workforce Development Office of the Chief Information Officer Office of the Associate CIO for Cyber Security October 2011 DOE Essential Body of Knowledge (EBK) October 2011 2 Table of Contents Executive Summary ...............................................................................................................4 DOE Essential Body of Knowledge (EBK) .........................................................................5 1.1 Data Security ..............................................................................................................6

446

Heat pipe radiation cooling (HPRC) for high-speed aircraft propulsion. Phase 2 (feasibility) final report  

DOE Green Energy (OSTI)

The National Aeronautics and Space Administration (NASA), Los Alamos National Laboratory (Los Alamos), and CCS Associates are conducting the Heat Pipe Radiation Cooling (HPRC) for High-Speed Aircraft Propulsion program to determine the advantages and demonstrate the feasibility of using high-temperature heat pipes to cool hypersonic engine components. This innovative approach involves using heat pipes to transport heat away from the combustor, nozzle, or inlet regions, and to reject it to the environment by thermal radiation from adjacent external surfaces. HPRC is viewed as an alternative (or complementary) cooling technique to the use of pumped cryogenic or endothermic fuels to provide regenerative fuel or air cooling of the hot surfaces. The HPRC program has been conducted through two phases, an applications phase and a feasibility phase. The applications program (Phase 1) included concept and assessment analyses using hypersonic engine data obtained from US engine company contacts. The applications phase culminated with planning for experimental verification of the HPRC concept to be pursued in a feasibility program. The feasibility program (Phase 2), recently completed and summarized in this report, involved both analytical and experimental studies.

Martin, R.A.; Merrigan, M.A.; Elder, M.G.; Sena, J.T.; Keddy, E.S. [Los Alamos National Lab., NM (United States); Silverstein, C.C. [CCS Associates, Bethel Park, PA (United States)

1994-03-25T23:59:59.000Z

447

Application of Abrasive-Waterjets for Machining Fatigue-Critical Aircraft Aluminum Parts  

SciTech Connect

The effects of dry-grid blasting of AWJ-machined dog-bone specimens of aircraft aluminum with aluminum oxide abrasives were investigated in terms of enhancement in fatigue performance and mitigating concerns of abrasive contamination. Results obtained from fatigue tests have indicated that the surface roughness, Ra, of AWJ-induced striations is inversely proportional to the fatigue life. The fatigue life of AWJ-machined and baseline specimens, excluding those processed with dry-grit blasting, decreases with the increase in Ra. Removal of the striations with dry-grit blasting until they disappear visually only reduces Ra from 3.5 to 2.4 ?m and is still higher than that of the conventionally machined edges with Ra = 1.6 ?m. From the surface roughness point of view, the fatigue life of the dry-grit blasted specimens should not have exceeded that of the baseline counterparts. Yet the dry-grit blasting process has extended the fatigue life of the AWJ-machined specimens and the baseline counterparts by more than four and three times, respectively. The extraordinary boost in the fatigue performance is believed to be attributed to the induction of residual compressive stresses by dry-grit blasting. Such a belief was subsequent confirmed quantitatively through measurements of residual compressive stresses. Dry-grid blasting can be carried out efficiently and cost effectively by stacking AWJ-machined parts together. The benefits gained from dry-grit blasting simply outweigh the marginal cost increase.

Liu, H. T.; Hovanski, Yuri; Dahl, Michael E.; Zeng, J.

2010-08-19T23:59:59.000Z

448

Comparing modeled isoprene with aircraft-based measurements in the atmospheric boundary layer.  

Science Conference Proceedings (OSTI)

Nonmethane hydrocarbons (NMHCs) are involved in a complex series of reactions that regulate the levels of oxidants in the troposphere. Isoprene (C{sub 5}H{sub 8}), the primary NMHC emitted from deciduous trees, is one of the most important reactive hydrocarbons in the troposphere. The amount of isoprene entering the free troposphere is regulated by the compound's rate of emission from leaves and by chemical and physical processes in the forest canopy and the atmospheric boundary layer (ABL). This study uses a coupled canopy-ABL model to simulate these complex processes and compares calculated isoprene concentration profiles with those measured during aircraft flights above a forested region in the northeastern US. Land use information is coupled with satellite remote sensing data to describe spatial changes in canopy density during the field measurements. The high-resolution transport-chemistry model of Gao et al. (1993) for the ABL and the forest canopy layer is used to simulate vertical changes in isoprene concentration due to turbulent mixing and chemical reactions. The one-dimensional (1-D) ABL model includes detailed radiation transfer, turbulent diffusion, biogenic emissions, dry deposition, and chemical processes within the forest canopy and the ABL. The measured profiles are compared with the model simulations to investigate the biological, physical, and chemical processes that regulate the levels of isoprene within the ABL.

Doskey, P.; Gao, W.

1997-12-12T23:59:59.000Z

449

The effects of aircraft noise at Williams Air Force Base Auxiliary Field on residential property values  

Science Conference Proceedings (OSTI)

This report considers the environmental consequences of moving the flight training operations of the US Air Force's 82nd Flying Training Wing from the auxiliary airfield, Coolidge-Florence Municipal Airport (CFMA), to a more remote location in Pinal County, Arizona. It examines how actual noise from touch-and-go flights of T-37 aircraft and perceived (anticipated) noise affect the market value of residential property near CFMA. Noise, measured by a noise index, is correlated with market values through a regression analysis applied to a hedonic price model of the Coolidge-Florence housing market. Prices and characteristics of 42 residential properties sold in 1987 and 1988 were used to estimate a perceived noise effect. The report finds that the coefficient on the measure of perceived noise, based on the noise exposure forecast (NEF) index, is statistically insignificant, even though the sign and value are consistent with those estimated in other studies. It concludes that current flights do not have a significant effect on residential property values, partially because there is no housing near CFMA. This and larger studies indicate that flight operations at a new auxiliary airfield would not affect property values if runways were at least 12,000 feet away from housing. 12 refs., 2 tabs.

Morey, M.J.

1990-11-01T23:59:59.000Z

450

Essential Body of Knowledge (EBK)  

Energy.gov (U.S. Department of Energy (DOE))

The Office of the Chief Information Officer (OCIO) utilized DOE cyber security policy, industry best practices and lessons learned, and comprehensive internal needs assessments to identify fundamental cyber security functional roles and associated responsibilities. In addition, core competencies were identified that represent the core skill set needed by cyber security professionals to adequately fulfill their functional roles. This collective information was further used to define the Enterprise Essential Body of Knowledge (EBK).

451

Photon emission near superconducting bodies  

Science Conference Proceedings (OSTI)

We study the photon emission due to a magnetic spin-flip transition of a two-level atom in the vicinity of a dielectric body such as a normal conducting metal or a superconductor. For temperatures below the transition temperature T{sub 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 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 nonmagnetic impurities as well as possible Eliashberg strong-coupling effects influence the spin-flip rate. It is found that nonmagnetic impurities as well as strong-coupling effects have no dramatic impact on the spin-flip lifetime.

Skagerstam, Bo-Sture K.; Rekdal, Per Kristian [Department of Physics, The Norwegian University of Science and Technology, N-7491 Trondheim (Norway)

2007-11-15T23:59:59.000Z

452

HST STIS Ultraviolet Spectral Evidence of Outflow in Extreme Narrow-line Seyfert 1 Galaxies: II. Modeling and Interpretation  

E-Print Network (OSTI)

We present modeling to explore the conditions of the broad-line emitting gas in two extreme Narrow-line Seyfert 1 galaxies, using the observational results described in the first paper of this series. Photoionization modeling using Cloudy was conducted for the broad, blueshifted wind lines and the narrow, symmetric, rest-wavelength-centered disk lines separately. A broad range of physical conditions were explored for the wind component, and a figure of merit was used to quantitatively evaluate the simulation results. Of the three minima in the figure-of-merit parameter space, we favor the solution characterized by an X-ray weak continuum, elevated abundances, a small column density (log(N_H)\\approx 21.4), relatively high ionization parameter (log(U)\\approx -1.2 - -0.2), a wide range of densities (log(n)\\approx 7 - 11), and a covering fraction of ~0.15. The presence of low-ionization emission lines implies the disk component is optically thick to the continuum, and the SiIII]/CIII] ratio implies a density of 10^10 - 10^10.25 cm^-3. A low ionization parameter (log(U)=-3) is inferred for the intermediate-ionization lines, unless the continuum is ``filtered'' through the wind before illuminating the intermediate-line emitting gas, in which case log(U)=-2.1. The location of the emission regions was inferred from the photoionization modeling and a simple ``toy'' dynamical model. A large black hole mass (1.3 x 10^8 M_\\odot) radiating at 11% of the Eddington luminosity is consistent with the kinematics of both the disk and wind lines, and an emission radius of ~10^4 R_S is inferred for both. We compare these results with previous work and discuss implications.

Karen M. Leighly

2004-02-19T23:59:59.000Z

453

Ground states in complex bodies  

E-Print Network (OSTI)

A unified framework for analyzing the existence of ground states in wide classes of elastic complex bodies is presented here. The approach makes use of classical semicontinuity results, Sobolev mappinngs and Cartesian currents. Weak diffeomorphisms are used to represent macroscopic deformations. Sobolev maps and Cartesian currents describe the inner substructure of the material elements. Balance equations for irregular minimizers are derived. A contribution to the debate about the role of the balance of configurational actions follows. After describing a list of possible applications of the general results collected here, a concrete discussion of the existence of ground states in thermodynamically stable quasicrystals is presented at the end.

Paolo Maria Mariano; Giuseppe Modica

2008-02-11T23:59:59.000Z

454

Metal stub and ceramic body electrode assembly  

DOE Patents (OSTI)

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.

Rolf, R.L.

1984-05-22T23:59:59.000Z

455

Regenerative fuel cells for High Altitude Long Endurance Solar Powered Aircraft  

DOE Green Energy (OSTI)

High Altitude Long Endurance (HALE) unmanned missions appear to be feasible using a lightweight, high efficiency, span-loaded, Solar Powered Aircraft (SPA) which includes a Regenerative Fuel Cell (RFC) system and novel tankage for energy storage. An existing flightworthy electric powered flying wing design was modified to incorporate present and near-term technologies in energy storage, power electronics, aerodynamics, and guidance and control in order to design philosophy was to work with vendors to identify affordable near-term technological opportunities that could be applied to existing designs in order to reduce weight, increase reliability, and maintain adequate efficiency of components for delivery within 18 months. The energy storage subsystem for a HALE SPA is a key driver for the entire vehicle because it can represent up to half of the vehicle weight and most missions of interest require the specific energy to be considerably higher than 200 W-hr/kg for many cycles. This stringent specific energy requirement precludes the use of rechargeable batteries or flywheels and suggests examination of various RFC designs. An RFC system using lightweight tankage, a single fuel cell (FC) stack, and a single electrolyzer (EC) stack separated by the length of a spar segment (up to 39 ft), has specific energy of {approximately}300 W-hr/kg with 45% efficiency, which is adequate for HALE SPA requirements. However, this design has complexity and weight penalties associated with thermal management, electrical wiring, plumbing, and structural weight. A more elegant solution is to use unitized RFC stacks (reversible stacks that act as both FCs and ECs) because these systems have superior specific energy, scale to smaller systems more favorably, and have intrinsically simpler thermal management.

Mitlitsky, F.; Colella, N.J.; Myers, B. [Lawrence Livermore National Lab., CA (United States); Anderson, C.J. [Aero Vironment, Inc., Monrovia, CA (United States)

1993-06-02T23:59:59.000Z

456

Damage tolerance assessment of bonded composite doubler repairs for commercial aircraft applications  

SciTech Connect

The Federal Aviation Administration has sponsored a project at its Airworthiness Assurance NDI Validation Center (AANC) to validate the use of bonded composite doublers on commercial aircraft. A specific application was chosen in order to provide a proof-of-concept driving force behind this test and analysis project. However, the data stemming from this study serves as a comprehensive evaluation of bonded composite doublers for general use. The associated documentation package provides guidance regarding the design, analysis, installation, damage tolerance, and nondestructive inspection of these doublers. This report describes a series of fatigue and strength tests which were conducted to study the damage tolerance of Boron-Epoxy composite doublers. Tension-tension fatigue and ultimate strength tests attempted to grow engineered flaws in coupons with composite doublers bonded to aluminum skin. An array of design parameters, including various flaw scenarios, the effects of surface impact, and other off-design conditions, were studied. The structural tests were used to: (1) assess the potential for interply delaminations and disbonds between the aluminum and the laminate, and (2) determine the load transfer and crack mitigation capabilities of composite doublers in the presence of severe defects. A series of specimens were subjected to ultimate tension tests in order to determine strength values and failure modes. It was demonstrated that even in the presence of extensive damage in the original structure (cracks, material loss) and in spite of non-optimum installations (adhesive disbonds), the composite doubler allowed the structure to survive more than 144,000 cycles of fatigue loading. Installation flaws in the composite laminate did not propagate over 216,000 fatigue cycles. Furthermore, the added impediments of impact--severe enough to deform the parent aluminum skin--and hot-wet exposure did not effect the doubler`s performance. Since the tests were conducting using extreme combinations of flaw scenarios (sizes and collocation) and excessive fatigue load spectrums, the performance parameters were arrived at in a conservative manner.

Roach, D.

1998-08-01T23:59:59.000Z

457

Intelligent executive guidance agent for general aviation aircraft under free flight  

E-Print Network (OSTI)

Conflict detection and resolution is a critical capability for the realization of free flight, a new concept of air traffic management that allows pilots to select their own flight paths and airspeeds in real time. A particularly demanding situation within this environment occurs when multiple traffic and weather conflicts arise simultaneously. A solution that forms the basis for this thesis is an agent based hierarchical system that attempts to provide optimal and conflict free flight path guidance in these multiple conflict situations. An intelligent executive guidance agent, acting as a high-level arbitrator, receives guidance information from a previously designed lower-level weather agent and a traffic detection and collision avoidance agent. When the flight path guidance from the two-lower level agents conflicts, the executive agent arbitrates by considering the spatial and temporal characteristics of the conflicting guidance. It classifies them as either tactical or strategic in nature, and then prioritizes them according to a pre-defined rule base of conflict priorities. The arbitration function thus acts as a fuzzy controller, and gradually switches the guidance between the weather agent and traffic agent, providing conflict free flight path guidance, as the aircraft flies in and out of dangerous regions. Results of test cases presented in the thesis demonstrate that the approach and algorithm can successfully resolve combined weather and traffic conflicts in real-time, subject to realistic imposed constraints. The severity of conflicting flight paths was managed within acceptable levels, and the ultimate recommended conflict free flight path is generally between those originally proposed by the weather and traffic agents. The algorithm does not exhibit any critical failures during cases tested, and proved robust and reliable. The proposed agent based hierarchical system, when integrated with a simplified flight management system coupled with a heading command and hold autopilot, offers an effective and reliable guidance and navigation system for generating safe, alternate flight paths in conflict situations.

Rong, Jie

2002-01-01T23:59:59.000Z

458

Evaluating and Constraining Ice Cloud Parameterizations in CAM5 using Aircraft Measurements from the SPARTICUS Campaign  

Science Conference Proceedings (OSTI)

This study uses aircraft measurements of relative humidity and ice crystal size distribution collected in synoptic cirrus during the SPARTICUS (Small PARTicles In CirrUS) field campaign to evaluate and constrain ice cloud parameterizations in the Community Atmosphere Model version 5. The probability density function (PDF) of ice crystal number concentration (Ni) derived from high frequency (1 Hz) measurements features a strong dependence on ambient temperature. As temperature decreases from -35C to -62C, the peak in the PDF shifts from 10-20 L-1 to 200-1000 L-1, while the ice crystal number concentration shows a factor of 6-7 increase. Model simulations are performed with two different insitu ice nucleation schemes. One of the schemes can reproduce a clear increase of Ni with decreasing temperature, by using either an observation based ice nuclei spectrum or a classical theory based spectrum with a relatively low (5%-10%) maximum freezing ratio for dust aerosols. The simulation with the other scheme, which assumes a high maximum freezing ratio (100%), shows much weaker temperature dependence of Ni. Simulations are also performed to test empirical parameters related to water vapor deposition and the auto-conversion of ice crystals to snow. Results show that a value between 0.05 and 0.1 for the water vapor deposition coefficient and 250 um for the critical ice crystal size can produce good agreements between model simulation and the SPARTICUS measurements in terms of ice crystal number concentration and effective radius. The climate impact of perturbing these parameters is also discussed.

Zhang, Kai; Liu, Xiaohong; Wang, Minghuai; Comstock, Jennifer M.; Mitchell, David; Mishra, Subhashree; Mace, Gerald G.

2013-05-14T23:59:59.000Z

459

A survey on wireless body area networks  

Science Conference Proceedings (OSTI)

The increasing use of wireless networks and the constant miniaturization of electrical devices has empowered the development of Wireless Body Area Networks (WBANs). In these networks various sensors are attached on clothing or on the body or even implanted ... Keywords: MAC, Routing, Wireless body area networks

Benot Latr; Bart Braem; Ingrid Moerman; Chris Blondia; Piet Demeester

2011-01-01T23:59:59.000Z

460

An Investigation of the Application of the Gas Generator-Free Turbine Cycle to a Nuclear Powered Aircraft  

SciTech Connect

This study has investigated the feasibility of installing a gas generator-free turbine type power plant in the R3Y aircraft, using a circulating fuel reactor as a power source. Two variations of the cycle were considered. The split flow cycle bleeds high temperature, high pressure air from the gas generator directly to the free turbine in the wing. The through flow cycle partially expands the high temperature, high pressure air through the compressor turbine of the gas generator then directs the compressor-turbine exhaust air to the free turbine in the wing. Design parameters of pressure ratio, radiator depth, radiation flow density, and hot gas duct size were optimized to give minimum weight per shaft horsepower of the complete power plant. The weight of a split flow power plant capable of supplying 22,000 shaft horsepower was found to be 116,600 pounds. The weight of a similar through flow power plant was found to be 119,900 pounds. The reactor power required in both cases was 70 megawatts. The nominal gross weight of the R3Y airplane is 175,000 pounds. With pay loads of approximately 20,000 pounds, either nuclear conversion will have a gross weight of 200,000 pounds. It was found that either cycle could be installed in the R3Y aircraft; however, the installation of either would require major structural redesign. The split flow cycle with its smaller hot air ducts required the least amount of redesign. A comparison of existing aircraft engines with a preliminary design of the split flow turbo-components indicated that the compressor and possibly the free turbine could be adapted from current engine components.

Alvis, J. H.; Chessman, S. R.

1957-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Comprehensive Technical Report, General Electric Direct-Air-Cycle Aircraft Nuclear Propulsion Program, Program Summary and References  

SciTech Connect

This is one of twenty-one volumes sumarizing the Aircraft Nuclear Propulsion Program of the General Electric Company. This volume discusses the background to the General Electric program, and summarizes the various direct-air-cycle nuclear test assemblies and power plants that were developed. Because of the requirements of high performance, low weight, and small size, vast improvements in existing technology were required to meet the flight objectives. The technological progress achieved during the program is also summarized. The last appendix contains a compilation of the abstracts, tables of contents, and reference lists of the other twenty volumes.

Thornton, G.; Rothstein, A.J.

1962-06-28T23:59:59.000Z

462

METHOD OF MAKING FUEL BODIES  

DOE Patents (OSTI)

An improved method of making a fuel body containing carbon for reactors is described. Carbides of uranium and thorium having a particle size of from 100 to 500 microns are mixed with carbon having a particle size that will pass a 200 mesh screen but be retained by a 325 mesh screen, and 10 per cent by weight pitch. The mixture is heated to a temperature of about 700 to 900 deg C, at which point bonding is effected while maintaining it under mechanical pressure of over 3,000 pounds per square inch. The entire compact is heated to a uniform temperature during the process, preferably by electrical resistance of the compact itself. (AEC)

Goeddel, W.V.; Simnad, M.T.

1962-04-24T23:59:59.000Z

463

Results of the independent radiological verification survey at the former Associate Aircraft Tool and Manufacturing Company site, Fairfield, Ohio (FOH001)  

Science Conference Proceedings (OSTI)

The former Associate Aircraft Tool and Manufacturing Company site is located at 3550 Dixie Highway, Fairfield, Ohio. Associate Aircraft Tool and Manufacturing Company produced hollow uranium slugs in a machine shop at the site in 1956. The work was performed for National Lead of Ohio in a contract with the Atomic Energy Commission to augment the capacity of the Feed Materials Production Center at Fernald in the development of nuclear energy for defense-related projects. The current occupant of the building, Force Control, operates a multipurpose machine shop. At the request of the US Department of Energy (DOE), a team from Oak Ridge National Laboratory conducted an independent radiological verification survey at the former Associate Aircraft Tool and Manufacturing Company Site, Fairfield, Ohio. The survey was performed from February to May of 1995. The purpose of the survey was to verify that radioactivity from residues of {sup 238}U was remediated to a level below acceptable DOE guidelines levels.

Rice, D.E.; Murray, M.E.; Brown, K.S.

1996-01-01T23:59:59.000Z

464

Narrow gap laser welding  

SciTech Connect

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.

Milewski, John O. (Santa Fe, NM); Sklar, Edward (Santa Fe, NM)

1998-01-01T23:59:59.000Z

465

Narrow gap laser welding  

DOE Patents (OSTI)

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.

Milewski, J.O.; Sklar, E.

1998-06-02T23:59:59.000Z

466

Aircraft Observations of Sub-cloud Aerosol and Convective Cloud Physical Properties  

E-Print Network (OSTI)

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 and Istanbul, Turkey, respectively. A set of 24 pairs of sub-cloud aerosol and cloud penetration data are analyzed. Measurements of fine and coarse mode aerosol concentrations from 3 different instruments were combined and fitted with lognormal distributions. The fit parameters of the lognormal distributions are compared with cloud droplet effective radii retrieved from 260 cloud penetrations. Cloud condensation nuclei (CCN) measurements for a subset of 10 cases from the Istanbul region are compared with concentrations predicted from aerosol size distributions. Ammonium sulfate was assumed to represent the soluble component of aerosol with dry sizes smaller than 0.5 mm and sodium chloride for aerosol larger than 0.5 mm. The measured CCN spectrum was used to estimate the soluble fraction. The correlations of the measured CCN concentration with the predicted CCN concentration were strong (R2 > 0.89) for supersaturations of 0.2, 0.3 and 0.6%. The measured concentrations were typically consistent with an aerosol having a soluble fraction between roughly 0.5 and 1.0, suggesting a contribution of sulfate or some other similarly soluble inorganic compound. The predicted CCN were found to vary by +or-3.7% when the soluble fraction was varied by 0.1. Cumulative aerosol concentrations at cutoff dry diameters of 1.1, 0.1 and 0.06 mm were found to be correlated with cloud condensation nuclei concentrations but not with maximum cloud base droplet concentrations. It is also shown that in some cases the predominant mechanisms involved in the formation of precipitation were altered and modified by the aerosol properties. This study suggests that CCN-forced variations in cloud droplet number concentration can change the effective radius profile and the type of precipitation hydrometeors. These differences may have a major impact on the global hydrological cycle and energy budget.

Axisa, Duncan

2009-12-01T23:59:59.000Z

467

HI Narrow Self-Absorption in Dark Clouds: Correlations with Molecular Gas and Implications for Cloud Evolution and Star Formation  

E-Print Network (OSTI)

We present the results of a comparative study of HI narrow self-absorption (HINSA), OH, 13CO, and C18O in five dark clouds. The HINSA follows the distribution of the emission of the carbon monoxide isotopologues, and has a characteristic size close to that of 13CO. This confirms that the HINSA is produced by cold HI which is well mixed with molecular gas in well-shielded regions. The ratio of the atomic hydrogen density to total proton density for these sources is 5 to 27 x 10^{-4}. Using cloud temperatures and the density of HI, we set an upper limit to the cosmic ray ionization rate of 10^{-16} s^{-1}. Comparison of observed and modeled fractional HI abundances indicates ages for these clouds to be 10^{6.5} to 10^{7} yr. The low values of the HI density we have determined make it certain that the time scale for evolution from an atomic to an almost entirely molecular phase, must be a minimum of several million years. This clearly sets a lower limit to the overall time scale for star formation and the lifetime of molecular clouds.

P. F. Goldsmith; D. Li

2004-12-16T23:59:59.000Z

468

Toward Photochemical Water Splitting Using Band-Gap-Narrowed Semiconductors and Transition-Metal Based Molecular Catalysts  

DOE Green Energy (OSTI)

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.

Muckerman,J.T.; Rodriguez, J.A.; Fujita, E.

2009-06-07T23:59:59.000Z

469

HST STIS Ultraviolet Spectral Evidence for Outflow in Extreme Narrow-line Seyfert 1 Galaxies: I. Data and Analysis  

E-Print Network (OSTI)

We present HST STIS observations of two extreme NLS1s, IRAS 13224-3809 and 1H 0707-495. The spectra are characterized by very blue continua, broad, strongly blueshifted high-ionization lines (including \\ion{C}{4} and \\ion{N}{5}), and narrow, symmetric intermediate- (including \\ion{C}{3}], \\ion{Si}{3}], \\ion{Al}{3}) and low-ionization (e.g., \\ion{Mg}{2}) lines centered at their rest wavelengths. The emission-line profiles suggest that the high-ionization lines are produced in a wind, and the intermediate- and low-ionization lines are produced in low-velocity gas associated with the accretion disk or base of the wind. In this paper, we present the analysis of the spectra from these two objects; in a companion paper we present photoionization analysis and a toy dynamical model for the wind. The highly asymmetric profile of \\ion{C}{4} suggests that it is dominated by emission from the wind, so we develop a template for the wind from the \\ion{C}{4} line. We model the bright emission lines in the spectra using a co...

Leighly, K M; Leighly, Karen M.; Moore, John R.

2004-01-01T23:59:59.000Z

470

A high precision instrument to measure angular and binocular deviation introduced by aircraft windscreens by using a shadow casting technique  

SciTech Connect

Objects viewed through transparent sheets with residual non-parallelism and irregularity appear shifted and distorted. This distortion is measured in terms of angular and binocular deviation of an object viewed through the transparent sheet. The angular and binocular deviations introduced are particularly important in the context of aircraft windscreens and canopies as they can interfere with decision making of pilots especially while landing, leading to accidents. In this work, we have developed an instrument to measure both the angular and binocular deviations introduced by transparent sheets. This instrument is especially useful in the qualification of aircraft windscreens and canopies. It measures the deviation in the geometrical shadow cast by a periodic dot pattern trans-illuminated by the distorted light beam from the transparent test specimen compared to the reference pattern. Accurate quantification of the shift in the pattern is obtained by cross-correlating the reference shadow pattern with the specimen shadow pattern and measuring the location of the correlation peak. The developed instrument is handy to use and computes both angular and binocular deviation with an accuracy of less than {+-}0.1 mrad ( Almost-Equal-To 0.036 mrad) and has an excellent repeatability with an error of less than 2%.

Shivananju, B. N.; Yamdagni, S. [Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012 (India); Vasu, R. M. [Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012 (India); Applied Photonics Initiative, Indian Institute of Science, Bangalore 560012 (India); Asokan, S. [Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012 (India); Applied Photonics Initiative, Indian Institute of Science, Bangalore 560012 (India); Robert Bosch Centre for Cyber Physical Systems, Indian Institute of Science, Bangalore 560012 (India)

2012-12-15T23:59:59.000Z

471

Measurements of cosmic radiation dose in subsonic commercial aircraft compared to the city-pair dose calculation  

SciTech Connect

The radiation dose received by passengers during flight on conventional jet aircraft was determined as a function of exposure to cosmic radiation, solar radiation, flight time, and flight path. The dosimetric measurements were made with thermoluminescent dosimeters (TLD's) and with emulsions of three types sealed in plastic packets. These packets were sent by air mail back and forth from Berkeley, California to five cities and a dose sufficiently above background for a satisfactory measurement was accumulated by the TLD's on one round trip and by the emulsions on three round trips. It was concluded that both experiments and theory show that the total doses received at present day conventional jet aircraft altitudes are considerably higher than those encountered in supersonic flights at much higher altitudes, even though the dose rate is lower at these lower altitudes, when the longer time of exposure at the lower altitudes is taken into consideration. Computer programs used in the dose calculations are included. (CH)

Wallace, R.

1973-07-16T23:59:59.000Z

472

Intersubband Transitions in Narrow InAs/AlSb Quantum Wells D. C. Larrabee, J. Tang, M. Liang, G. A. Khodaparast, J. Kono  

E-Print Network (OSTI)

Intersubband Transitions in Narrow InAs/AlSb Quantum Wells D. C. Larrabee, J. Tang, M. Liang, G. A investigated intersubband transitions (ISBTs) in InAs/AlSb multiple quantum wells with well widths from 2.1 to 10 nm. The ISBT energy increased with decreasing well width and temperature. To explain these well

Kono, Junichiro

473

Creation of stable nanoconstrictions in metallic thin films via progressive narrowing by focused-ion-beam technique and in situ control of resistance  

Science Conference Proceedings (OSTI)

This work describes the use of focused-ion-beam for the fabrication of metallic nanoconstrictions on a Fe thin film with in situ monitoring of the structure's resistance. With this approach the sequential FIB steps that are used for the gradual narrowing ... Keywords: Conductance quantum G0, FIB patterning, Magnetoresistive thin films, Nanoconstriction

J. Vincenc Obo?a; J. M. de Teresa; R. Crdoba; A. Fernndez-Pacheco; M. R. Ibarra

2009-04-01T23:59:59.000Z

474

A Direct Comparison of Two RDI Shipboard ADCPs: A 75-kHz Ocean Surveyor and a 150-kHz Narrow Band  

Science Conference Proceedings (OSTI)

During a recent transit from Florida to Rhode Island, simultaneous single-ping data were recorded from two acoustic Doppler current profilers on the R/V Endeavor: an old 150-kHz narrow bandwidth (NB) model, and a new 75-kHz model [Ocean Surveyor (...

Julia M. Hummon; Eric Firing

2003-06-01T23:59:59.000Z

475

Complex bodies with memory: linearized setting  

E-Print Network (OSTI)

The mechanics of complex bodies with memory effects is discussed in linearized setting. The attention is focused on the characterization of free energies in terms of minimum work and maximum recoverable work in the bulk and along a discontinuity surface endowed with its own surface energy, a surface internal to the body. To this aim, use is made of techniques proposed by Del Piero. Consequences of the Clausius-Duhem inequality are investigated for complex bodies with instantaneous linear elastic response.

Paolo Maria Mariano; Paolo Paoletti

2008-05-28T23:59:59.000Z

476

Liquid Desiccant Drying of Thermoreversibly Gelcast Bodies  

Science Conference Proceedings (OSTI)

Presentation Title, Liquid Desiccant Drying of Thermoreversibly Gelcast Bodies. Author(s), Noah O Shanti, Katherine T Faber. On-Site Speaker (Planned), Noah...

477

Media Kit 2014 Body. Mind. Inspiration.  

E-Print Network (OSTI)

THE TRUTH ABOUT KIDS AND PORN PHOTO I.D. MY MOTHER AND THE PRINCE YUMI STYNES I QUITE LIKE MY BODY GORGEOUS

Peters, Richard

478

Method of producing .beta.-spodumene bodies  

DOE Patents (OSTI)

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.

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

479

Narrow Energy Spread Protons and Ions from High-Intensity, High-Contrast Laser Solid Target Interactions  

Science Conference Proceedings (OSTI)

Recent simulations show that an idealized, high intensity, short pulse laser can generate quasi-monoenergetic proton beams with energies over 100 MeV in an interaction with a thin film. However, most short pulse laser facilities with sufficient intensity have difficulty controlling the nanosecond and picosecond contrast necessary to realize such a regime. Experiments were performed to investigate proton and ion acceleration from a high contrast, short pulse laser by employing dual plasma mirrors along with a deformable mirror at the HERCULES laser facility at the Center for Ultrafast Optical Sciences, University of Michigan. Plasma mirrors were characterized, allowing a 50% throughput with an intensity contrast increase of 105. The focal spot quality was also exceptional, showing a 1.1 micron full width at half maximum (FWHM) focal diameter. Experiments were done using temporally cleaned 30 TW, 32 fs pulses to achieve an intensity of up to 10{sup 21} Wcm{sup -2} on Si{sub 3}N{sub 4} and Mylar targets with thicknesses ranging 50 nm to 13 microns. Proton beams with energy spreads below 2 MeV were observed from all thicknesses, peaking with energies up to 10.3 MeV and an energy spread of 0.8 MeV. Similar narrow energy spreads were observed for oxygen, nitrogen, and carbon at the silicon nitride thickness of 50 nm with energies up to 24 MeV with an energy spread of 3 MeV, whereas the energy spread is greatly increased at a larger thickness. Maximum energies were confirmed with CR39 track detectors, while a Thomson ion spectrometer was used to gauge the monoenergetic nature of the beam.

Dollar, Franklin; Matsuoka, Takeshi; McGuffey, Christopher; Bulanov, Stepan S.; Chvykov, Vladimir; Kalintchenko, Galina; Thomas, Alec G. R.; Willingale, Louise; Yanovsky, Victor; Maksimchuk, Anatoly; Krushelnick, Karl [Center for Ultrafast Optical Science, Univ. Of Michigan, Ann Arbor, MI 48109 (United States); Davis, Jack; Petrov, George [Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375 (United States)

2010-11-04T23:59:59.000Z

480

Original article: Design of a medium voltage power converter-storage devices embedded in a hybrid emergency network for more electrical aircraft  

Science Conference Proceedings (OSTI)

The purpose of this paper is to present and describe a hybrid electrical network for an aircraft in emergency operation. The principle of this network is to hybridize, through a bidirectional DC/DC converter, a high speed turbine (Ram Air turbine - RAT) ... Keywords: Electrical network, Electrochemical storage, Energy management, Hybridization, Power converter design

R. Rigo Mariani, F. Lacressonniere, G. Fontes, X. Roboam

2013-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "narrow body aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Arbitrary body segmentation in static images  

Science Conference Proceedings (OSTI)

In this paper, a novel method for segmenting arbitrary human body in static images is proposed. With the body probability map obtained by the pictorial structure model, we develop a superpixel based EM-like algorithm to refine the map, which can then ... Keywords: l1 based graph cuts, Pictorial structure, Superpixel based EM algorithm

Shifeng Li; Huchuan Lu; Lei Zhang

2012-09-01T23:59:59.000Z

482

Maintaining ideal body weight counseling sessions  

SciTech Connect

The purpose of this program is to provide employees with the motivation, knowledge and skills necessary to maintain ideal body weight throughout life. The target audience for this program, which is conducted in an industrial setting, is the employee 40 years of age or younger who is at or near his/her ideal body weight.

Brammer, S.H.

1980-10-09T23:59:59.000Z

483

TIGER -- A technology to improve the delivery capability of nuclear bombs and the survivability of the delivery aircraft  

SciTech Connect

The TIGER (Terminal guided and Extended-Range) Program was initiated in 1972 to study improved delivery capabilities for stockpiled tactical nuclear bombs. The Southeast Asia conflict fostered the development of air-delivered standoff conventional weapons utilizing terminal guidance systems. SNL initiated the TIGER program to determine if current nuclear bombs could be provided with a similarly accurate standoff capabilities. These conventional weapon delivery techniques, while allowing highly accurate attack, generally require entering the target area at high altitude to establish line of sight to the target. In parallel with the TIGER program, system studies analyzed this concept and showed marked improvement in aircraft and weapon survivability with moderate standoff (10--20 km) if low level deliveries (60 m) could be accomplished. As a result of this work, the TIGER program was redirected in early 1974 to demonstrate a standoff bomb with good accuracy (90 m CEP) when delivered from low flying aircraft. This program redirection resulted in the selection of an inertial guidance system to replace the earlier terminal guidance systems. This program was called the Extended-Range Bomb (ERB). In May 1974, a joint Air Force/DOE study identified the desirability of having a single tactical weapon which could be employed against either fixed, preselected targets, or mobile battlefield targets. Studies conducted on the ERB system showed that the inertially guided weapon could fly not only the standoff mission but also a return-to-target mission against the mobile battlefield targets whose locations are not known accurately enough to use a standoff delivery. The ERB program evolved from these initial investigations into an exploratory program to develop the hardware and demonstrate the technology required to fly standoff and return-to-target trajectories. The application of this technology in the form of field retrofit kits to the B61 bomb is called TIGER II.

1980-12-31T23:59:59.000Z

484

Comparison of improved Aura Tropospheric Emission Spectrometer (TES) CO{sub 2} with HIPPO and SGP aircraft profile measurements  

SciTech Connect

Comparisons are made between mid-tropospheric Tropospheric Emission Spectrometer (TES) carbon dioxide (CO{sub 2}) satellite measurements and ocean profiles from three Hiaper Pole-to-Pole Observations (HIPPO) campaigns and land aircraft profiles from the United States Southern Great Plains (SGP) Atmospheric Radiation Measurement (ARM) site over a 4-yr period. These comparisons are used to characterize the bias in the TES CO{sub 2} estimates and to assess whether calculated and actual uncertainties and sensitivities are consistent. The HIPPO dataset is one of the few datasets spanning the altitude range where TES CO{sub 2} estimates are sensitive, which is especially important for characterization of biases. We find that TES CO{sub 2} estimates capture the seasonal and latitudinal gradients observed by HIPPO CO{sub 2} measurements; actual errors range from 0.81.2 ppm, depending on the campaign, and are approximately 1.4 times larger than the predicted errors. The bias of TES versus HIPPO is within 0.85 ppm for each of the 3 campaigns; however several of the sub-tropical TES CO{sub 2} estimates are lower than expected based on the calculated errors. Comparisons of aircraft flask profiles, which are measured from the surface to 5 km, to TES CO{sub 2} at the SGP ARM site show good agreement with an overall bias of 0.1 ppm and rms of 1.0 ppm. We also find that the predicted sensitivity of the TES CO{sub 2} estimates is too high, which results from using a multi-step retrieval for CO{sub 2} and temperature. We find that the averaging kernel in the TES product corrected by a pressure-dependent factor accurately reflects the sensitivity of the TES CO{sub 2} product.

Kulawik, S. S.; Worden, J. R.; Wofsy, S. C.; Biraud, S. C.; Nassar, R.; Jones, D. B.A.; Olsen, E. T.; Osterman, G. B.

2012-02-01T23:59:59.000Z

485

Search for heavy narrow dilepton resonances in pp collisions at $\\sqrt{s}$ = 7 TeV and $\\sqrt{s}$ = 8 TeV  

E-Print Network (OSTI)

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at $\\sqrt{s}$ = 7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 inverse femtobarns, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model Z'$_{SSM}$ resonance lighter than 2590 GeV, a superstring-inspired Z'$_{\\psi}$ lighter than 2260 GeV, and Kaluza-Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter $k/\\bar{M}_{Pl}$ is 0.10 (0.05). These are the most stringent limits to date.

Chatrchyan, Serguei; Sirunyan, Albert M; Tumasyan, Armen; Adam, Wolfgang; Aguilo, Ernest; Bergauer, Thomas; Dragicevic, Marko; Er, Janos; Fabjan, Christian; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hrmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knnz, Valentin; Krammer, Manfred; Krtschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Pernicka, Manfred; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Christine; Rohringer, Herbert; Schfbeck, Robert; Strauss, Josef; Taurok, Anton; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Bansal, Monika; Bansal, Sunil; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Luyckx, Sten; Mucibello, Luca; Ochesanu, Silvia; Roland, Benoit; Rougny, Romain; Selvaggi, Michele; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Gonzalez Suarez, Rebeca; Kalogeropoulos, Alexis; Maes, Michael; Olbrechts, Annik; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Clerbaux, Barbara; De Lentdecker, Gilles; Dero, Vincent; Gay, Arnaud; Hreus, Tomas; Lonard, Alexandre; Marage, Pierre Edouard; Mohammadi, Abdollah; Reis, Thomas; Thomas, Laurent; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Adler, Volker; Beernaert, Kelly; Cimmino, Anna; Costantini, Silvia; Garcia, Guillaume; Grunewald, Martin; Klein, Benjamin; Lellouch, Jrmie; Marinov, Andrey; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Sigamani, Michael; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Walsh, Sinead; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Bruno, Giacomo; Castello, Roberto; Ceard, Ludivine; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Lemaitre, Vincent; Liao, Junhui; Militaru, Otilia; Nuttens, Claude; Pagano, Davide; Pin, Arnaud; Piotrzkowski, Krzysztof; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Alves, Gilvan; Correa Martins Junior, Marcos; Martins, Thiago; Pol, Maria Elena; Henrique Gomes E Souza, Moacyr; Ald Jnior, Walter Luiz; Carvalho, Wagner; Custdio, Analu; Da Costa, Eliza Melo; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Malbouisson, Helena; Malek, Magdalena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santoro, Alberto; Soares Jorge, Luana; Sznajder, Andre; Vilela Pereira, Antonio; Souza Dos Anjos, Tiago; Bernardes, Cesar Augusto; De Almeida Dias, Flavia; Tomei, Thiago; De Moraes Gregores, Eduardo; Lagana, Caio; Da Cunha Marinho, Franciole; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Genchev, Vladimir; Iaydjiev, Plamen; Piperov, Stefan; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Tcholakov, Vanio; Trayanov, Rumen; Vutova, Mariana; Dimitrov, Anton; Hadjiiska, Roumyana; Kozhuharov, Venelin; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Jiang, Chun-Hua; Liang, Dong; Liang, Song; Meng, Xiangwei; Tao, Junquan; Wang, Jian; Wang, Xianyou; Wang, Zheng; Xiao, Hong; Xu, Ming; Zang, Jingjing; Zhang, Zhen; Asawatangtrakuldee, Chayanit; Ban, Yong; Guo, Yifei; Li, Wenbo; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Teng, Haiyun; Wang, Dayong; Zhang, Linlin; Zou, Wei; Avila, Carlos; Carrillo Montoya, Camilo Andres; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Osorio Oliveros, Andres Felipe; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Plestina, Roko; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Duric, Senka; Kadija, Kreso; Luetic, Jelena; Mekterovic, Darko; Morovic, Srecko; Tikvica, Lucija; Attikis, Alexandros; Galanti, Mario; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; Elgammal, Sherif; Ellithi Kamel, Ali; Kuotb Awad, Alaa Metwaly; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Mntel, Mait; Murumaa, Marion; Raidal, Martti; Rebane, Liis; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko; Hrknen, Jaakko; Heikkinen, Mika Aatos; Karimki, Veikko; Kinnunen, Ritva; Kortelainen, Matti J; Lampn, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindn, Tomas; Luukka, Panja-Riina; Menp, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Ungaro, Donatella; Wendland, Lauri; Korpela, Arja; Tuuva, Tuure

2013-01-01T23:59:59.000Z

486

Search for heavy narrow dilepton resonances in pp collisions at sqrt(s) = 7 TeV and sqrt(s) = 8 TeV  

E-Print Network (OSTI)

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at sqrt(s) = 7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 inverse femtobarns, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model Z'[SSM] resonance lighter than 2590 GeV, a superstring-inspired Z'[psi] lighter than 2260 GeV, and Kaluza-Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/M-bar[Pl] is 0.10 (0.05). These are the most stringent limits to date.

CMS Collaboration

2012-12-26T23:59:59.000Z

487

Turbulence Measurements from a Towed Body  

Science Conference Proceedings (OSTI)

A towed body suitable for measuring oceanic velocity and temperature microstructure is described. The development was motivated by i) a requirement for long times series to produce statistically reliable estimates of dissipation rates, ii) the ...

Thomas R. Osborn; Rolf G. Lueck

1985-12-01T23:59:59.000Z

488

Techniques for Intravascular Foreign Body Retrieval  

SciTech Connect

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.

Woodhouse, Joe B.; Uberoi, Raman, E-mail: raman.uberoi@orh.nhs.uk [Oxford University Hospitals (United Kingdom)

2013-08-01T23:59:59.000Z

489

Opportunistic packet scheduling in body area networks  

Science Conference Proceedings (OSTI)

Significant research efforts are being devoted to Body Area Networks (BAN) due to their potential for revolutionizing healthcare practices. Energy-efficiency and communication reliability are critically important for these networks. In an experimental ...

K. Shashi Prabh; Jan-Hinrich Hauer

2011-02-01T23:59:59.000Z

490

Ballistic Resistance of Body Armor NIJ Standard-0101.06  

Science Conference Proceedings (OSTI)

... 08 STANDARDS Ballistic Resistance of Body Armor NIJ Standard-0101.06 ... Ballistic Resistance of Body Armor NIJ Standard0101.06 ...

2012-05-01T23:59:59.000Z

491

Kinetic characterization of enhanced lipase activity on oil bodies  

Science Conference Proceedings (OSTI)

reaction kinetics of oil bodies versus oil emulsions as sub- strates for lipolytic ... of hydrolysis for the oil body system was comparatively very low due to a brief...

492

Observation of a narrow mass state decaying into Upsilon(1S) + gamma in $p\\bar{p}$ collisions at sqrt(s) = 1.96 TeV  

Science Conference Proceedings (OSTI)

Using data corresponding to an integrated luminosity of 1.3 fb{sup -1}, we observe a narrow mass state decaying into {Upsilon}(1S) + {gamma}, where the {Upsilon}(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The significance of this observation is 5.6 standard deviations. The mass of the state is centered at 10.551 {+-} 0.014(stat.) {+-} 0.017(syst.) GeV/c{sup 2}, which is consistent with that of the state recently observed by the ATLAS Collaboration.

Abazov, Victor Mukhamedovich; Abbott, Braden Keim; Acharya, Bannanje Sripath; Adams, Mark Raymond; Adams, Todd; Alexeev, Guennadi D.; Alkhazov, Georgiy D.; Alton, Andrew K.; Alverson, George O.; Aoki, Masato; Askew, Andrew Warren

2012-03-01T23:59:59.000Z

493

Joining of porous silicon carbide bodies  

DOE Patents (OSTI)

A method of joining two porous bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the porous bodies, including the sintering aids, and a binder to initially join the porous bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.

Bates, Carl H. (Worcester, MA); Couhig, John T. (Worcester, MA); Pelletier, Paul J. (Thompson, CT)

1990-05-01T23:59:59.000Z

494

REDUCTION OF THE MOMENTUM OF FALLING BODIES  

DOE Patents (OSTI)

A means for catching free falling bodies that may be damaged upon impact is given. Several layers of floating gas-filled rubber balls are contained within a partially compartmented tank of liquid. The compartment extends from beneath the surface of the liquid to that height necessary to contain the desired number of layers of the balls. The balls and the liquid itself break the force of the fall by absorbing the kinetic energy of falling body. The body may then be retrieved from the floor of the tank by a rake that extends from outside of the tank through the free surface area and underneath the compartment wall. This arrangement is particularly useful in collecting irradiated atomic fuel rods that are discharged from a reactor at considerable height without damaging the thin aluminum jacket of the rods.

Kendall, J.W.; Morrison, I.H.

1954-09-21T23:59:59.000Z

495

Three-body interactions in colloidal systems  

E-Print Network (OSTI)

We present the first direct measurement of three-body interactions in a colloidal system comprised of three charged colloidal particles. Two of the particles have been confined by means of a scanned laser tweezers to a line-shaped optical trap where they diffused due to thermal fluctuations. Upon the approach of a third particle, attractive three-body interactions have been observed. The results are in qualitative agreement with additionally performed nonlinear Poissson-Boltzmann calculations, which also allow us to investigate the microionic density distributions in the neighborhood of the interacting colloidal particles.

J. Dobnikar; M. Brunner; H. H. von Grnberg; C. Bechinger

2008-01-25T23:59:59.000Z

496

Control of underactuated fluid-body systems with real-time particle image velocimetry  

E-Print Network (OSTI)

Controlling the interaction of a robot with a fluid, particularly when the desired behavior is intimately related to the dynamics of the fluid, is a difficult and important problem. High-performance aircraft cannot ignore ...

Roberts, John W., Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

497

Probing Unification With Chandra HETGS and XMM-Newton EPIC And RGS Spectroscopy of the Narrow Emission Line Galaxy NGC 2110  

E-Print Network (OSTI)

We present results from Chandra HETGS (250 ks over two epochs) and XMM-Newton EPIC and RGS (60 ks) observations of NGC 2110, which has been historically classified as a Narrow Emission Line Galaxy galaxy. Our results support the interpretation that the source is a Seyfert 2 viewed through a patchy absorber. The nuclear X-ray spectrum of the source is best described by a power law of photon index $\\Gamma$ ~1.7, modified by absorption from multiple layers of neutral material at a large distance from the central supermassive black hole. We report the strong detections of Fe K$\\alpha$ and Si K$\\alpha$ lines, which are marginally resolved with the Chandra HETGS, and we constrain the emission radius of the fluorescing material to >1 pc. There is some evidence for modest additional broadening at the base of the narrow Fe K$\\alpha$ core with a velocity ~4500 km s$^{-1}$. We find tentative evidence for ionized emission (O VIII Ly $\\alpha$, an O VIII RRC feature, and possibly a Ne IX forbidden line) in the Chandra MEG ...

Evans, Daniel A; Turner, T Jane; Weaver, Kimberly A; Marshall, Herman L

2007-01-01T23:59:59.000Z

498

Emotional body language displayed by artificial agents  

Science Conference Proceedings (OSTI)

Complex and natural social interaction between artificial agents (computer-generated or robotic) and humans necessitates the display of rich emotions in order to be believable, socially relevant, and accepted, and to generate the natural emotional responses ... Keywords: Human computer interactions, emotional body language, human robot interactions

Aryel Beck; Brett Stevens; Kim A. Bard; Lola Caamero

2012-03-01T23:59:59.000Z

499

Geometry of interactions in complex bodies  

E-Print Network (OSTI)

We analyze geometrical structures necessary to represent bulk and surface interactions of standard and substructural nature in complex bodies. Our attention is mainly focused on the influence of diffuse interfaces on sharp discontinuity surfaces. In analyzing this phenomenon, we prove the covariance of surface balances of standard and substructural interactions.

Chiara de Fabriitis; Paolo Maria Mariano

2004-06-18T23:59:59.000Z

500

Rigid Body Simulation with Local Fracturing Effects  

Science Conference Proceedings (OSTI)

Focusing on the real-time and interactive ability features in the Virtual Reality application, we propose a fracture pattern based on local fracture mechanism. Taking advantage of the experience analysis or the offline computation verified fracture characteristic, ... Keywords: Rigid Body, pre-fracture, fracture pattern, local fracture, dynamics

Wu Bo; Zeng Liang; Wu Yagang

2011-05-01T23:59:59.000Z