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Note: This page contains sample records for the topic "twin otter aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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1

Final Project Report - ARM CLASIC CIRPAS Twin Otter Aerosol  

SciTech Connect (OSTI)

The NOAA/ESRL/GMD aerosol group made three types of contributions related to airborne measurements of aerosol light scattering and absorption for the Cloud and Land Surface Interaction Campaign (CLASIC) in June 2007 on the Twin Otter research airplane operated by the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS). GMD scientists served as the instrument mentor for the integrating nephelometer and particle soot absorption photometer (PSAP) on the Twin Otter during CLASIC, and were responsible for (1) instrument checks/comparisons; (2) instrument trouble shooting/repair; and (3) data quality control (QC) and submittal to the archive.

John A. Ogren

2010-04-05T23:59:59.000Z

2

E-Print Network 3.0 - afm-04 twin otter Sample Search Results  

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

Working Groups Summary: clouds over the SEP. C-130, RHB, Twin Otter, G-1, BAe-146 LES WRF-Chem GCMs HowellHuebertClarke Bandy... nuclei (CCN). C-130, RHB, G-1, Twin Otter,...

3

ARM - Campaign Instrument - otter  

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

: Twin Otter (OTTER) Instrument Categories Airborne Observations Campaigns Fall 1995 UAV IOP Download Data Southern Great Plains, 1995.09.01 - 1995.09.30 Fall 1997 UAV IOP...

4

ARM - Campaign Instrument - uav-met-otter  

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

a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Meteorology from UAV-Twin Otter (UAV-MET-OTTER) Instrument Categories Airborne Observations Campaigns ARESE...

5

OTTER Project Page  

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

Field Campaigns > OTTER (Oregon) Field Campaigns > OTTER (Oregon) The Oregon Transect Ecosystem Research (OTTER) Project Overview The purpose of the Oregon Transect Ecosystem Research (OTTER) Project was to estimate major fluxes of carbon, nitrogen, and water in forest ecosystems using an ecosystem-process model driven by remotely sensed data. The project was conducted from 1990 to 1991. The DAAC's data holdings include background data from 1989. OTTER data sets include: Canopy Chemistry Meteorology Field Sunphotometer Airborne Sunphotometer Timber Measurements These data were transferred to the ORNL DAAC from the Ames Research Center node of the Pilot Land Data System (PLDS). The ORNL DAAC LBA Data archive includes 14 data products. Study sites included a coastal forest of western hemlock, sitka spruce, and

6

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

7

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

8

Coupling of twin rectangular supersonic jets  

E-Print Network [OSTI]

Twin jet plumes on aircraft can couple, producing dynamic pressures significant enough to cause structural fatigue. For closely spaced jets with a moderate aspect ratio (e.g. 5), previous work has established that two ...

Raman, G.; Taghavi, Ray

1998-01-01T23:59:59.000Z

9

Otter Tail Power Company - Commercial and Industrial Energy Efficiency  

Broader source: Energy.gov (indexed) [DOE]

Otter Tail Power Company - Commercial and Industrial Energy Otter Tail Power Company - Commercial and Industrial Energy Efficiency Grant Program Otter Tail Power Company - Commercial and Industrial Energy Efficiency Grant Program < Back Eligibility Commercial Industrial Savings Category Heating & Cooling Home Weatherization Construction Commercial Weatherization Commercial Heating & Cooling Design & Remodeling Other Heat Pumps Manufacturing Appliances & Electronics Program Info State Minnesota Program Type Utility Grant Program Rebate Amount Varies Provider Customer Service Otter Tail Power Company Grants for Conservation Program allows its commercial and industrial customers to submit energy-saving proposals and receive grants for their custom efficiency projects. Possibilities include but are not limited to:

10

Otter Tail Power Co | Open Energy Information  

Open Energy Info (EERE)

Otter Tail Power Co Otter Tail Power Co Place Minnesota Utility Id 14232 Utility Location Yes Ownership I NERC Location MISO NERC MRO Yes Operates Generating Plant Yes Activity Generation Yes Activity Transmission Yes Activity Buying Transmission Yes Activity Distribution Yes Activity Wholesale Marketing Yes Activity Bundled Services Yes Alt Fuel Vehicle Yes Alt Fuel Vehicle2 Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png COGENERATION PURCHASE RATE Commercial Civil Defense - Fire Sirens Commercial Farm Service Single Phase Commercial

11

Ashtabula - Otter Tail Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Ashtabula - Otter Tail Wind Farm Ashtabula - Otter Tail Wind Farm Facility Ashtabula - Otter Tail Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Otter Tail Power Co. Developer NextEra Energy Resources Energy Purchaser Otter Tail Power Co. Location Northeastern Barnes County- ND ND Coordinates 47.123021°, -97.895° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":47.123021,"lon":-97.895,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

12

Otter Tail Power Company- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Otter Tail Power Company offers incentives to all residential customers in South Dakota to install energy efficient equipment in residences. Rebates are available for geothermal and air source heat...

13

Aircraft: Keeping Aircraft Quieter  

Science Journals Connector (OSTI)

... of Trade, is due to come into effect. Present day aircraft such as the Boeing 707 and the British VC-10 will be exempt from this restriction, the aim ... land in Britain unless they possess a valid noise certificate. The first model of the Boeing 747 jumbo jet will not be affected by the new regulations, as planning started ...

1970-04-04T23:59:59.000Z

14

Langdon II - Otter Tail Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Langdon II - Otter Tail Wind Farm Langdon II - Otter Tail Wind Farm Facility Langdon II - Otter Tail Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Otter Tail Power Co. Developer NextEra Energy Resources/Otter Tail Power Co. Energy Purchaser Otter Tail Power Co. Location Cavalier County ND Coordinates 48.687255°, -98.309298° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":48.687255,"lon":-98.309298,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

15

Otter Tail Power Company - Commercial Energy Efficiency Rebate Program |  

Broader source: Energy.gov (indexed) [DOE]

Otter Tail Power Company - Commercial Energy Efficiency Rebate Otter Tail Power Company - Commercial Energy Efficiency Rebate Program Otter Tail Power Company - Commercial Energy Efficiency Rebate Program < Back Eligibility Agricultural Commercial Industrial Savings Category Heating & Cooling Commercial Heating & Cooling Heating Heat Pumps Appliances & Electronics Commercial Lighting Lighting Manufacturing Water Heating Maximum Rebate Water Heaters: $5,000 Lighting: over $4,500 must be preapproved Program Info State South Dakota Program Type Utility Rebate Program Rebate Amount Lighting (Hard-Wired Systems): $0.20/watt of demand reduction Lighting (Screw-In CFL/LED): $0.05/watt of demand reduction Motors: $20 - $3,000 Air Source Heat Pumps: $160 Geothermal Heat Pumps: $350 Water Heaters: $150 - $300; or $20/kw Thermal Storage: $20 - $40

16

Otter Tail Power Company - Dollar Smart Financing Program | Department of  

Broader source: Energy.gov (indexed) [DOE]

Loans may not exceed 80% of projects total cost Loans may not exceed 80% of projects total cost General Residential: $7,000 Geothermal for Residential: $20,000 Dual Fuel for Residential: $15,000 General Business: $25,000 Geothermal for Business: $40,000 Program Info State North Dakota Program Type Utility Loan Program Rebate Amount Minimum: $150 Provider Otter Tail Power Company Otter Tail Power Company's Dollar Smart Financing Program offers $150 - $40,000 loans to its residential and business customers. Customers who have satisfactory 12-month payment histories with Otter Tail or another utility may use the 8.5% interest rate loan to finance purchases of new electric technologies. Loans may not exceed 80 percent of the project's total cost, and the maximum residential loan is $7,000 with the exception of geothermal

17

Otter Tail Power Company - Dollar Smart Financing Program | Department of  

Broader source: Energy.gov (indexed) [DOE]

Residential: $20,000 Residential: $20,000 Commercial: $40,000 Program Info State South Dakota Program Type Utility Loan Program Rebate Amount Residential: $7,000 Residential Geothermal Heat Pump: $15,000 - $20,000 Commercial: $25,000 Commercial Geothermal Heat Pump: $40,000 Provider Otter Tail Power Company Otter Tail Power Company's Dollar Smart Financing Program offers loans of $150 - $40,000 to residential and business customers. Customers who have satisfactory 12-month payment histories with Otter Tail or another utility may use the 8.5% interest rate loan to finance purchases of new electric technologies. Loans may not exceed 80 percent of the project's total cost, and the maximum residential loan is $7,000 with the exception of geothermal heat pump installations and combination electric systems such as a thermal

18

Otter Tail Power Company - Residential Energy Efficiency Rebate Program |  

Broader source: Energy.gov (indexed) [DOE]

Residential Energy Efficiency Rebate Residential Energy Efficiency Rebate Program Otter Tail Power Company - Residential Energy Efficiency Rebate Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Heat Pumps Appliances & Electronics Commercial Lighting Lighting Water Heating Maximum Rebate Refrigeration/Cooking/Lighting: rebate will not exceed 75% of project cost Program Info State Minnesota Program Type Utility Rebate Program Rebate Amount Water Heaters: $150 - $300 Thermal Storage Units: $20 - $40/KW Insulation: up to $300 Refrigerator Recycling: $50 Air-Source Heat Pumps: $240/ton Geothermal Heat Pumps: $600/ton Lighting: In-store discount Provider Customer Service Otter Tail Power Company Rebate Program offers rebates to qualifying

19

NPP Temperate Forest: OTTER Project Sites, Oregon, U.S.A.  

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

Temperate Forest: OTTER Project Sites, Oregon, U.S.A., 1989-1991 Temperate Forest: OTTER Project Sites, Oregon, U.S.A., 1989-1991 [PHOTOGRAPH] Photograph: Forest in the western coastal range of Oregon (click on the photo to view a series of images from the OTTER sites) Data Citation Cite this data set as follows: Waring, R. H., B. Law, and B. Bond. 1999. NPP Temperate Forest: OTTER Project Sites, Oregon, U.S.A., 1989-1991. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. Description The Oregon Transect Ecosystem Research Project (OTTER) was conducted to develop a strategy to extrapolate point measurements and estimates of ecosystem structure and function across large geographic regions that varied in climate and vegetation. The full spectrum of remote-sensing data

20

Otter Tail Power Company - DollarSmart Energy Efficiency Loan Program |  

Broader source: Energy.gov (indexed) [DOE]

Otter Tail Power Company - DollarSmart Energy Efficiency Loan Otter Tail Power Company - DollarSmart Energy Efficiency Loan Program Otter Tail Power Company - DollarSmart Energy Efficiency Loan Program < Back Eligibility Agricultural Commercial Industrial Residential Savings Category Other Heating & Cooling Commercial Heating & Cooling Heating Cooling Home Weatherization Commercial Weatherization Sealing Your Home Ventilation Heat Pumps Appliances & Electronics Commercial Lighting Lighting Manufacturing Water Heating Maximum Rebate Residential: $20,000 Business: $100,000 Loans may not exceed 80% of the project's total cost Program Info State Minnesota Program Type Utility Loan Program Rebate Amount Residential: $150 - $20,000 Business: $150 - $100,000 Provider Otter Tail Power Company Otter Tail Power Company's DollarSmart Financing Program offers $150 -

Note: This page contains sample records for the topic "twin otter 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

Tweed, Twins, and Holes  

E-Print Network [OSTI]

distribution is that of collapsing porous minerals under stress, where the main focus of research is the identification of precursor effects as warning signs for larger events such as the collapse of mines, boreholes or even regional earth quakes... science in which the functionality of a device material is no longer expected to be present in the bulk of the material but located in its nanoscopically small regions such as twin boundaries. This approach is summarized as domain boundary engineering...

Salje, Ekhard K.H.

2014-07-08T23:59:59.000Z

22

Habitat associations and photo-identification of sea otters in Simpson Bay, Prince William Sound, Alaska  

E-Print Network [OSTI]

male and female sea otters bore nose scars. Forty-five percent of all individuals encountered were considered identifiable from nose scars and a total of 114 individuals were identified. This compares favorably with the results of photo-identification...

Gilkinson, Andrea Karin

2006-04-12T23:59:59.000Z

23

Otter Tail Power Co (South Dakota) | Open Energy Information  

Open Energy Info (EERE)

South Dakota South Dakota Utility Id 14232 References Energy Information Administration.[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png GS (General Service Secondary) Commercial GS-TOU (General Service Time-Of-Use) RDC Residential RS Commercial SGS (Small General Service Secondary Service) Commercial test Residential Average Rates Residential: $0.0813/kWh Commercial: $0.0656/kWh Industrial: $0.0569/kWh The following table contains monthly sales and revenue data for Otter Tail Power Co (South Dakota). Month RES REV (THOUSAND $) RES SALES (MWH) RES CONS COM REV (THOUSAND $) COM SALES (MWH) COM CONS IND_REV (THOUSAND $) IND SALES (MWH) IND CONS OTH REV (THOUSAND $) OTH SALES (MWH) OTH CONS TOT REV (THOUSAND $) TOT SALES (MWH) TOT CONS

24

Otter Tail Power Company - Commercial and Industrial Energy Efficiency  

Broader source: Energy.gov (indexed) [DOE]

Commercial and Industrial Energy Commercial and Industrial Energy Efficiency Rebate Program Otter Tail Power Company - Commercial and Industrial Energy Efficiency Rebate Program < Back Eligibility Agricultural Commercial Industrial Savings Category Home Weatherization Commercial Weatherization Heating & Cooling Commercial Heating & Cooling Cooling Heating Heat Pumps Appliances & Electronics Commercial Lighting Lighting Manufacturing Water Heating Maximum Rebate Refrigeration/Cooking/Lighting: rebate will not exceed 75% of project cost Retrocommissioning: $20,000 Retrocommissioning: Building must have at least 40,000 sq ft of conditioned space Program Info State Minnesota Program Type Utility Rebate Program Rebate Amount Water Heating: $150 - $300 or $20/kW Thermal Storage: $20 - $40/kW Condensers: $25/HP - $100/HP

25

Otter Tail Power Company - Energy Efficiency Rebate Program | Department of  

Broader source: Energy.gov (indexed) [DOE]

Energy Efficiency Rebate Program Energy Efficiency Rebate Program Otter Tail Power Company - Energy Efficiency Rebate Program < Back Eligibility Commercial Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Appliances & Electronics Water Heating Maximum Rebate Commercial Water Heaters: $5,000 Program Info State North Dakota Program Type Utility Rebate Program Rebate Amount Residential Demand Control: $300/unit Water Heaters: $150 - $300 Commercial Water Heaters: $20/kW RDC Thermal Storage Units: $20/kW, up to 100 kW Deferred-load Thermal Storage Units: $20/kw, up to 200 kW, plus $10/kW for up to 1,000 additional kW Fixed-time-of-delivery Thermal Storage Units: $40/kw, up to 200 kW, plus $20/kW for up to 1,000 additional kW AC Controls: $7/month seasonally

26

Otter Tail Power Co (North Dakota) | Open Energy Information  

Open Energy Info (EERE)

North Dakota North Dakota Utility Id 14232 References Energy Information Administration.[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png General Service GS 50-401 Commercial Large General Service LGS 50-603 Commercial Large General Service Time of Day 50-611 Commercial Residential Service RS 50-101 Residential Small General Service SGS 50-404 Commercial Average Rates Residential: $0.0772/kWh Commercial: $0.0688/kWh Industrial: $0.0604/kWh The following table contains monthly sales and revenue data for Otter Tail Power Co (North Dakota). Month RES REV (THOUSAND $) RES SALES (MWH) RES CONS COM REV (THOUSAND $) COM SALES (MWH) COM CONS IND_REV (THOUSAND $) IND SALES (MWH) IND CONS OTH REV (THOUSAND $) OTH SALES (MWH) OTH CONS TOT REV (THOUSAND $) TOT SALES (MWH) TOT CONS

27

Researches on the Twin Prime Problem  

E-Print Network [OSTI]

Twin prime number problem is mainly the structure of the twin prime numbers and whether there are infinitely many prime twins group. In this paper, by constructing a special cluster number set(see formula(2.3)in the paper), proves that the number of set number of the first n columns set the intersection of the minimum number of q is decision of the prime twins (q, q+2), and the minimum number of series is divergent(see Theorem 2).The main rezults are Theorem 2,Theorem 3 and Theorem 4.Prime twins so thoroughly proved there must be infinitely many groups of twin prime conjecture.

Zhang Baoshan

2014-05-11T23:59:59.000Z

28

Giant otter population responses to habitat expansion and degradation induced by a mega hydroelectric dam  

Science Journals Connector (OSTI)

Abstract Large hydroelectric dams are major drivers of habitat loss and degradation in lowland Amazonia. Hydroelectric reservoirs reduce the habitat available for terrestrial species, but create new open-water and shoreline lake habitat that can potentially boost populations of aquatic and semi-aquatic species, such as the threatened giant otter (Pteronura brasiliensis). To assess the impacts of mega-dams on this apex-predator, we surveyed the giant otter population across the 443,772-hectare Balbina Hydroelectric Reservoir of central Brazilian Amazonia between 14 and 25years after this reservoir creation. We compared changes in habitat area and estimated giant otter population size between the reservoir pre- and post-filling stages. The Balbina dam created ?3525 islands and increased the open-water surface and total reservoir perimeter available to otters by a factor of 62.7 and 8.9, respectively. Some 25years after damming, however, the estimated post-filling giant otter population size was only twice greater than that estimated before filling and 4.5 times smaller than would be predicted given the total available habitat area and density of dens quantified at a neighbouring undisturbed area used as a surrogate of the pre-filling phase. The observed mismatch between the proportional increase in otter population size and the much greater newly available reservoir habitat area is likely due to low habitat quality in terms of low fish prey productivity and scarcity of suitable sites for denning and territory demarcation. This should be considered in strategic environmental impact assessments of planned hydroelectric dams and in managing existing and future hydropower development in lowland tropical forests.

Ana Filipa Palmeirim; Carlos A. Peres; Fernando C.W. Rosas

2014-01-01T23:59:59.000Z

29

Potential for Sea Otter Exposure to Remnants of Buried Oil From the Exxon Valdez Oil Spill  

Science Journals Connector (OSTI)

Length of shoreline surveyed in each subdivision, number of sea otter pits identified, and the tide height of the highest pit are summarized. ... One of the formerly oiled non-SSO sites (Herring Bay, KN5000) and two unoiled reference sites (Lower Herring Bay, KN551A; KN551E) were surveyed in both 2005 and 2006 to provide a temporal overview of otter pitting in the study area. ... (4)?Page, D. S.; Boehm, P. D.; Brown, J. S.; Neff, J. M.; Burns, W. A.; Bence, A. E. Mussels document loss of bioavailable polycyclic aromatic hydrocarbons and the return to baseline conditions for oiled shorelines in Prince William Sound, Alaska. ...

Paul D. Boehm; David S. Page; Jerry M. Neff; Charles B. Johnson

2007-09-05T23:59:59.000Z

30

Plastic strain due to twinning in austenitic TWIP steels  

E-Print Network [OSTI]

Plastic strain due to twinning in austenitic TWIP steels B. Qin and H. K. D. H. Bhadeshia* Twinning induced plasticity steels are austenitic alloys in which mechanical twinning is a prominent deformation, Twinning, Twinning induced plasticity, Automobiles Introduction Mechanical twinning is a plastic

Cambridge, University of

31

Conceptual aircraft dynamics from inverse aircraft modeling  

E-Print Network [OSTI]

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

Ziegler, Gregory E

1999-01-01T23:59:59.000Z

32

FEEDING BEHAVIOR AND MAJOR PREY SPECIES OF THE SEA OTTER, ENHYDRA LUTRIS, IN MONTAGUE STRAIT,  

E-Print Network [OSTI]

. com- mun.). The area is characterized by a rugged coastline with rocky shores. Two sand beaches occur into the Sound from Montague Island: mud flats and small estuaries are common. The mud flats support stands (1969:57) stated that "generally sea otters favor waters adjacent to rocky coasts near points of land

33

P-3 B Aircraft  

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

features of this aircraft include numerous zenith, nadir and oblique ports to mount experiments. Most of the ports are contained within the pressurized cabin...

34

ARM - Other Aircraft Campaigns  

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

35

Twin Ridges | Open Energy Information  

Open Energy Info (EERE)

Ridges Ridges Jump to: navigation, search Name Twin Ridges Facility Twin Ridges Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner EverPower Developer EverPower Energy Purchaser Merchant Location Somerset County PA Coordinates 39.76104709°, -78.91136169° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":39.76104709,"lon":-78.91136169,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

36

On Opposition in Spherical Buildings and Twin Buildings  

Science Journals Connector (OSTI)

...In this paper, we prove a combinatorial property of twin apartments and opposition of chambers in twin buildings. We then characterize adjacency of chambers in twin buildings by meansof opposition of chambers....

P. Abramenko; H. Van Maldeghem

2000-06-01T23:59:59.000Z

37

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

38

Partial coherence with twin photons  

Science Journals Connector (OSTI)

An approach for calculating fourth-order coherence functions between fields produced in the parametric down-conversion process is proposed. It takes into account the transverse correlations between twin photons and is used to calculate the visibility of the interference patterns obtained in double-slit experiments with coincidence detection. The finite dimension of the light source and detectors are shown to be responsible for a kind of partial coherence which affects the visibility of the fringes. The results explain known features and predict other ones.

P. H. Souto Ribeiro

1997-11-01T23:59:59.000Z

39

Clean Cities: Twin Cities Clean Cities coalition  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Twin Cities Clean Cities Coalition Twin Cities Clean Cities Coalition The Twin Cities Clean Cities coalition works with vehicle fleets, fuel providers, community leaders, and other stakeholders to reduce petroleum use in transportation. Twin Cities Clean Cities coalition Contact Information Lisa Thurstin 651-223-9568 lisa.thurstin@lungmn.org Coalition Website Clean Cities Coordinator Lisa Thurstin Photo of Lisa Thurstin Lisa Thurstin has been the coordinator of the Twin Cities Clean Cities coalition since 2006. She is also the manager of Clean Fuel and Vehicle Technologies for the American Lung Association in Minnesota (ALAMN). For nine years, her duties have included management of ALAMN's biofuels activities through the Clean Air Choice consumer education program. Her responsibilities include coordinating events, designing educational and

40

Innervation Patterns of Sea Otter (Enhydra lutris) Mystacial Follicle-Sinus Complexes  

E-Print Network [OSTI]

NEUROANATOMY ORIGINAL RESEARCH ARTICLE published: 29 October 2014 doi: 10.3389/fnana.2014.00121 Innervation patterns of sea otter (Enhydra lutris ) mystacial follicle-sinus complexes Christopher D. Marshall1,2*, Kelly Rozas1, Brian Kot1 and Verena A... in the study and take responsibility for the integrity of the data and the accu- racy of the data analysis. Study concept and design: Christopher D. Marshall. Acquisition of data: Kelly Rozas, Christopher D. Marshall, Verena A. Gill, Brian Kot. Analysis...

Marshall, Christopher D.; Rozas, Kelly; Kot, Brian; Gill, Verena A.

2014-10-29T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Asymmetric twins in rhombohedral boron carbide  

SciTech Connect (OSTI)

Superhard materials consisting of light elements have recently received considerable attention because of their ultrahigh specific strength for a wide range of applications as structural and functional materials. However, the failure mechanisms of these materials subjected to high stresses and dynamic loading remain to be poorly known. We report asymmetric twins in a complex compound, boron carbide (B{sub 4}C), characterized by spherical-aberration-corrected transmission electron microscopy. The atomic structure of boron-rich icosahedra at rhombohedral vertices and cross-linked carbon-rich atomic chains can be clearly visualized, which reveals unusual asymmetric twins with detectable strains along the twin interfaces. This study offers atomic insights into the structure of twins in a complex material and has important implications in understanding the planar defect-related failure of superhard materials under high stresses and shock loading.

Fujita, Takeshi, E-mail: tfujita@wpi-aimr.tohoku.ac.jp; Guan, Pengfei; Madhav Reddy, K.; Hirata, Akihiko; Guo, Junjie [WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan); Chen, Mingwei, E-mail: mwchen@wpi-aimr.tohoku.ac.jp [WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan); State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030 (China)

2014-01-13T23:59:59.000Z

42

Shock Driven Twinning in Tantalum Single Crystals  

SciTech Connect (OSTI)

Recovery based observations of high pressure material behavior generated under high explosively driven flyer based loading conditions are reported. Two shock pressures, 25, and 55 GPa and four orientations {l_brace}(100), (110), (111), (123){r_brace} were considered. Recovered material was characterized using electron backscatter diffraction along with a limited amount of transmission electron microscopy to assess the occurrence of twinning under each test condition. Material recovered from 25 GPa had a very small fraction of twinning for the (100), (110), and (111) oriented crystals while a more noticeable fraction of the (123) oriented crystal was twinned. Material recovered from 55 GPa showed little twinning for (100) orientation slightly more for the (111) orientation and a large area fraction for the (123) orientation. The EBSD and TEM observations of the underlying deformation substructure are rationalized by comparing with previous static and dynamic results.

McNaney, J M; HSUING, L M; Barton, N R; Kumar, M

2009-07-20T23:59:59.000Z

43

Activity Budget, Field Metabolic Rate, and Foraging Ecology of Female Sea Otters (Enhydra lutris kenyoni) with Dependent Pups in Alaska  

E-Print Network [OSTI]

, Alaska. Unlike most previous studies of sea otters which were conducted in coastal areas with a rocky benthos and kelp canopy, the benthic habitat in this study was primarily soft sediment (mud or mixed mud and gravel) with no canopy-forming kelps...

Wolt, Ryan C.

2014-04-30T23:59:59.000Z

44

Deformation twinning mechanisms in FCC and HCP metals  

SciTech Connect (OSTI)

We report the recent work on twinning and detwinning in fcc and hcp metals based on the in situ and ex situ TEM observations and molecular dynamics simulations. Three aspects are discussed in this paper. (1) Detwinning in single-phase Cu with respect to growth twins, (2) deformation twinning in Ag-Cu composites, and (3) deformation twinning mechanisms in hcp metals. The main conclusion is that atomic structures of interfaces (twin boundaries, two-phases interface, and grain boundaries) play a crucial role in nucleating and propagating of deformation twins.

Wang, Jian [Los Alamos National Laboratory; Tome, Carlos N [Los Alamos National Laboratory; Beyerlein, Irene J [Los Alamos National Laboratory; Misra, Amit [Los Alamos National Laboratory; Mara, N [Los Alamos National Laboratory

2011-01-31T23:59:59.000Z

45

Solar twins in M67  

E-Print Network [OSTI]

The discovery of true solar analogues is fundamental for a better understanding of the Sun and of the solar system. The open cluster M67 offers a unique opportunity to search for solar analogues because its chemical composition and age are very similar to those of the Sun. We analyze FLAMES spectra of a large number of M67 main sequence stars to identify solar analogues in this cluster.We first determine cluster members which are likely not binaries, by combining proper motions and radial velocity measurements. We concentrate our analysis on the determination of stellar effective temperature, using analyses of line-depth ratios and H$\\alpha$ wings, making a direct comparison with the solar spectrum obtained with the same instrument. We also compute the lithium abundance for all the stars.Ten stars have both the temperature derived by line-depth ratios and H$\\alpha$ wings within 100 K from the Sun. From these stars we derive, assuming a cluster reddening $E(B-V)=0.041$, the solar colour $(B-V)_\\odot=0.649\\pm0.016$ and a cluster distance modulus of 9.63. Five stars are most similar (within 60 K) to the Sun and candidates to be true solar twins. These stars have also a low Li content, comparable to the photospheric abundance of the Sun, likely indicating a similar mixing evolution. We find several candidates for the best solar analogues ever. These stars are amenable to further spectroscopic investigations and planet search. The solar colours are determined with rather high accuracy with an independent method, as well as the cluster distance modulus.

L. Pasquini; K. Biazzo; P. Bonifacio; S. Randich; L. Bedin

2008-07-01T23:59:59.000Z

46

The military aircraft gas turbine  

Science Journals Connector (OSTI)

The development of the gas turbine for use in military aircraft is discussed. The advancing fields of component technology and engine testing are also outlined

R.M. Denning; R.J. Lane

1983-01-01T23:59:59.000Z

47

Low-noise macroscopic twin beams  

E-Print Network [OSTI]

Applying a multiphoton-subtraction technique to two-color macroscopic squeezed vacuum state of light generated via high-gain parametric down conversion we conditionally prepare a new state of light: bright multi-mode low-noise twin beams. The obtained results demonstrate up to 8-fold suppression of noise in each beam while preserving and even moderately improving the nonclassical photon number correlations between the beams. The prepared low-noise macroscopic state, containing up to 2000 photons per mode, is not among the states achievable through nonlinear optical processes. The proposed technique substantially improves the usefulness of twin beams for quantum technologies.

Timur Sh. Iskhakov; Vladyslav C. Usenko; Radim Filip; Maria V. Chekhova; Gerd Leuchs

2014-08-27T23:59:59.000Z

48

Introduction High-shear wet granulation by twin screw extrusion  

E-Print Network [OSTI]

and compaction16,17 . Wet granulation in a twin screw extruder is particularly useful with many investigates foam granulation in a twin screw extruder as a new continuous wet granulation technique drop or spray liquid addition in batch granulation. This work demonstrates a twin screw extruder

Thompson, Michael

49

1 INTRODUCTION In industrial mixing processes, as twin screw  

E-Print Network [OSTI]

the domain occupied by the fluid inside a portion of a twin screw extruder or a batch mixer. For a Newtonian-set/Hamilton-Jacobi method. Two flow case studies will be presented in this paper: the flow within a twin-screw extruder1 INTRODUCTION In industrial mixing processes, as twin screw compounding or batch mixing

Paris-Sud XI, Université de

50

On Opposition in Spherical Buildings and Twin Buildings  

E-Print Network [OSTI]

On Opposition in Spherical Buildings and Twin Buildings Peter Abramenko 1 \\Lambda Hendrik Van apartments in twin buildings by means of the opposition relation on chambers. We also characterize adjacency of chambers in twin buildings by means of opposition of chambers. As an application, we study maps which

Bielefeld, University of

51

Accelerated immunosenescence in preindustrial twin mothers  

E-Print Network [OSTI]

Accelerated immunosenescence in preindustrial twin mothers Samuli Helle* , Virpi Lummaa , and Jukka that this tradeoff is a result of reproductive costs accelerating senescence of the immune system, leading to earlier accelerated immunosenescence. immune function cost of reproduction longevity reproductive effort tuberculosis

Lummaa, Virpi

52

Twin Cities Regional Bicycle System Study  

E-Print Network [OSTI]

Twin Cities Regional Bicycle System Study Developing a Regional Bicycle Network CTS Research Corridors Analysis Results Proposed Regional Bicycle Network Critical Bicycle Links Next Steps Introduction #12;3 Improve knowledge base of regional bicycle transportation system and learn · How on

Minnesota, University of

53

Group actions on twin buildings Peter Abramenko  

E-Print Network [OSTI]

Group actions on twin buildings Peter Abramenko Introduction Though parts of the present paper sense) for the action of G(k[t, t-1 ]) on the product + � - of the two associated Bruhat�Tits buildings 4 also yielded a preliminary version of Lemma 2 involving both affine buildings + and -. Thus I

Chapman, Robin

54

Instrumentation of a light twin aircraft for flow energizer flight tests  

E-Print Network [OSTI]

pressure measurements were repeatable even From different flights, although near the nacelles spanwise Flow produced up to 127 uncertainty in Cp at the leading edge pressure orifice. In addition, pressure measurements were compared to wind tunnel.... . . . . . . . . . . , . . 39 41 20 Cp Compar i son Measured at Row A Cp Comparison Measured at Row B. Z2. Cp Comparison Measured at Row C. Cp Compar i son Measured at Row 0. 47 48 49 50 ix Figure 24 Comparison of Predicted, Wind Tunnel Test, and Flight Test Cp...

Binford, Robert Susumu

2012-06-07T23:59:59.000Z

55

Twin Buttes Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Buttes Wind Farm Buttes Wind Farm Jump to: navigation, search Name Twin Buttes Wind Farm Facility Twin Buttes Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Developer PPM Energy Inc Energy Purchaser Xcel Energy Location Prowers County CO Coordinates 37.674215°, -102.639971° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":37.674215,"lon":-102.639971,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

56

The Twin Higgs mechanism and Composite Higgs  

E-Print Network [OSTI]

We combine the Twin Higgs mechanism with the paradigm of Composite Higgs models. In this class of models the Higgs is a pseudo-Nambu-Goldstone boson from a strongly coupled sector near the TeV scale, and it is additionally protected by a discrete symmetry due to the twin mechanism. We discuss the model building issues associated with this setup and quantify the tuning needed to achieve the correct electroweak vacuum and the Higgs mass. In contrast to standard Composite Higgs models, the lightest resonance associated with the top sector is the uncolored mirror top, while the colored top partners can be made parameterically heavier without extra tuning. In some cases, the vector resonances are predicted to lie in the multi-TeV range. We present models where the resonances - both fermions and vectors - being heavier alleviates the pressure on naturalness coming from direct searches demonstrating that theories with low tuning may survive constraints from the Large Hadron Collider.

Low, Matthew; Wang, Lian-Tao

2015-01-01T23:59:59.000Z

57

Aircraft Cabin Environmental Quality Sensors  

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

58

ARM - Field Campaign - Aircraft Carbon  

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

59

Hybrid powertrain for light aircraft  

Science Journals Connector (OSTI)

In this paper, we evaluate the possibility of employing a hybrid powertrain to propel a light aircraft. The work suggests that the incorporation of a hybrid powertrain has little effect on fuel consumption for a light aircraft operating in a condition of straight and level cruise. However, there is a potential decrease in fuel consumption when a light aircraft operates either in climb or when manoeuvring over a conventionally powered aircraft. This is due to three main factors, namely, the energy harvested during descent by a windmilling propeller, the engine being switched off during descent and the fact that the air/fuel mixture does not have to be enriched during climbing phases. Estimating the potential fuel savings is obviously mission dependent, however, an unshrouded propeller could harvest enough energy to provide 39% of the excess power required for climbing. This figure could be significantly increased by use of a shrouded propeller.

John Olsen; John R. Page

2014-01-01T23:59:59.000Z

60

Phenomenology of the left-right twin Higgs model  

E-Print Network [OSTI]

Phenomenology of the Left-Right Twin Higgs Model* Hock-SengUniversity of California. Phenomenology of the Left-Rightwith rich collider phenomenology. In addition, there are

Goh, Hock-Seng

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

E-Print Network 3.0 - andidentical twins discordant Sample Search...  

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

twins discordant Page: << < 1 2 3 4 5 > >> 1 Discordance of prenatal and neonatal brain development in twins Niyati Mukherjee a Summary: Discordance of prenatal and neonatal...

62

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

63

Aircraft System Identification Using Artificial Neural Networks  

E-Print Network [OSTI]

Aircraft System Identification Using Artificial Neural Networks Kenton Kirkpatrick , Jim May Jr Artificial Neural Network System Identification, has the advantages of being straightforward with low for aircraft using an artificial neural network (ANN). Artificial neural networks are useful for creating

Valasek, John

64

Development Cycle Time Simulation For Civil Aircraft  

Science Journals Connector (OSTI)

Cycle Time Reduction (CTR) will be one of the major factors affecting the future of the civil aerospace industry. This focus is the end reflection of the level of competition in the commercial large carrier aircraft industry. Aircraft manufacturer must ...

Spitz William; Golaszewski Richard; Berardino Frank; Johnson Jesse

2001-01-01T23:59:59.000Z

65

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.

66

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

67

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

68

Twin Laws and Energy in Monoclinic Hydroxyapatite, Ca5(PO4)3(OH)  

Science Journals Connector (OSTI)

Twin Laws and Energy in Monoclinic Hydroxyapatite, Ca5(PO4)3(OH) ... The structure of the resulting twinned interfaces are hypothesized, and the twin energy for each interface is calculated. ... It results that the activation energy for the nucleation of a three-dimensional (3D) twin can be hardly distinguished from the one needed to nucleate a single 3D crystal. ...

Dino Aquilano; Marco Bruno; Marco Rubbo; Linda Pastero; Francesco Roberto Massaro

2014-11-25T23:59:59.000Z

69

Public Meeting: Draft Renewable Energy and Efficient Energy Projects Loan Guarantee Solicitation- Twin Cities, MN  

Broader source: Energy.gov [DOE]

University of Minnesota, Twin Cities, Institute on the Environment, Learning & Environmental Sciences, R-380

70

Two wide-angle imaging neutral-atom spectrometers (TWINS)  

SciTech Connect (OSTI)

Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) is a revolutionary new mission designed to stereoscopically image the magnetosphere in charge exchange neutral atoms for the first time. The authors propose to fly two identical TWINS instruments as a mission of opportunity on two widely-spaced high-altitude, high-inclination US Government spacecraft. Because the spacecraft are funded independently, TWINS can provide a vast quantity of high priority science observations (as identified in an ongoing new missions concept study and the Sun-Earth Connections Roadmap) at a small fraction of the cost of a dedicated mission. Because stereo observations of the near-Earth space environs will provide a particularly graphic means for visualizing the magnetosphere in action, and because of the dedication and commitment of the investigator team to the principles of carrying space science to the broader audience, TWINS will also be an outstanding tool for public education and outreach.

McComas, D.J. [Los Alamos National Lab., NM (United States)] [Los Alamos National Lab., NM (United States); Blake, B. [Aerospace Corp., CA (United States)] [Aerospace Corp., CA (United States); Burch, J. [Southwest Research Inst., San Antonio, TX (United States)] [and others] [Southwest Research Inst., San Antonio, TX (United States); and others

1998-11-01T23:59:59.000Z

71

Wet-gas compression in twin-screw multiphase pumps  

E-Print Network [OSTI]

encountered when operating under conditions with high gas volume fractions (GVF). Twin-screw multiphase pumps experience a severe decrease in efficiency when operating under wet-gas conditions, GVF over 95%. Field operations have revealed severe vibration...

Chan, Evan

2009-05-15T23:59:59.000Z

72

A probabilistic twin nucleation model for HCP polycrystalline metals  

Science Journals Connector (OSTI)

...stress. From this concept, the probability distribution for the critical...300K. twinning|nucleation|probability|statistics|HCP|size effect| 1. Introduction...n,p) with n trials and probability of success p=lambda/n yields...

2010-01-01T23:59:59.000Z

73

Strain-controlled thermal conductivity in ferroic twinned films  

E-Print Network [OSTI]

Large reversible changes of thermal conductivity are induced by mechanical stress, and the corresponding device is a key element for phononics applications. We show that the thermal conductivity ? of ferroic twinned thin ...

Li, Suzhi

74

Influence of shockwave obliquity on deformation twin formation in Ta  

SciTech Connect (OSTI)

Energetic loading subjects a material to a 'Taylor wave' (triangular wave) loading profile that experiences an evolving balance of hydrostatic (spherical) and deviatoric stresses. While much has been learned over the past five decades concerning the propensity of deformation twinning in samples shockloaded using 'square-topped' profiles as a function of peak stress, achieved most commonly via flyer plate loading, less is known concerning twinning propensity during non-I-dimensional sweeping detonation wave loading. Systematic small-scale energetically-driven shock loading experiments were conducted on Ta samples shock loaded with PEFN that was edge detonated. Deformation twinning was quantified in post-mortem samples as a function of detonation geometry and radial position. In the edge detonated loading geometry examined in this paper, the average volume fraction of deformation twins was observed to drastically increase with increasing shock obliquity. The results of this study are discussed in light of the formation mechanisms of deformation twins, previous literature studies of twinning in shocked materials, and modeling of the effects of shock obliquity on the evolution of the stress tensor during shock loading.

Gray, George T., III [Los Alamos National Laboratory; Livescu, V [Los Alamos National Laboratory; Cerreta, E K [Los Alamos National Laboratory; Mason, T A [Los Alamos National Laboratory; Maudlin, P J [RETIRED; Bingert, J F [Los Alamos National Laboratory

2009-02-18T23:59:59.000Z

75

Manoeuvring characteristics of twin-rudder systems: rudder-hull interaction effect on the manoeuvrability of twin-rudder ships  

Science Journals Connector (OSTI)

With a recent increase in ship capacity and propulsion performance, a wide-beam ship fitted with a twin-rudder system has ... adopted in many cases. However, to improve ship manoeuvring, it is still necessary to ...

Sahbi Khanfir; Kazuhiko Hasegawa

2011-12-01T23:59:59.000Z

76

A robust guidance system for aircraft approach and landing  

E-Print Network [OSTI]

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

Yu, Ren-Jye

1999-01-01T23:59:59.000Z

77

Managing IT investment for aircraft sustainment  

E-Print Network [OSTI]

for managing investment in aircraft spares. Case study 1: the process reference model, referredManaging IT investment for aircraft sustainment Michael MacDonnell, Department of Management in terms of both annual revenue and the scale and complexity of its value chain. Operations practices (and

de Weck, Olivier L.

78

The multi-stop aircraft routing problem  

E-Print Network [OSTI]

We study the multi-stop aircraft routing problem, determining the sequence of stops and the number of passengers to carry in each segment route. The objective of the aircraft routing problem is to maximize the profit derived from the transportation...

Garci?a Castan?eda, Salvador

1995-01-01T23:59:59.000Z

79

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

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

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

80

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

Broader source: Energy.gov (indexed) [DOE]

Electrical Generation for More-Electric Aircraft using Solid Oxide Fuel Cells Electrical Generation for More-Electric Aircraft using Solid Oxide Fuel Cells This study, completed by...

Note: This page contains sample records for the topic "twin otter 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

Analysis of the structural continuity in twinned crystals in terms of pseudo-eigensymmetry of crystallographic orbits  

Science Journals Connector (OSTI)

A general approach to the analysis of structural continuity in twins is presented and applied to the known twins in melilite.

Marzouki, M.A.

2013-10-18T23:59:59.000Z

82

On deformation twinning in a 17.5%Mn-TWIP steel: A physically...  

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

On deformation twinning in a 17.5%Mn-TWIP steel: A physically-based phenomenological model. On deformation twinning in a 17.5%Mn-TWIP steel: A physically-based phenomenological...

83

On existence of infinite primes and infinite twin primes  

E-Print Network [OSTI]

The twin primes conjecture is a very old problem. Tacitly it is supposed that the primes it deals with are finite. In the present paper we consider three problems that are not related to finite primes but deal with infinite integers. The main tool of our investigation is a numeral system proposed recently that allows one to express various infinities and infinitesimals easily and by a finite number of symbols. The problems under consideration are the following and for all of them we give affermative answers: (i) do infinite primes exist? (ii) do infinite twin primes exist? (ii) is the set of infinite twin primes infinite? Examples of these three kinds of objects are given.

Maurice Margenstern; Yaroslav D. Sergeyev

2015-01-08T23:59:59.000Z

84

Twin Groves II (07) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Twin Groves II (07) Wind Farm Twin Groves II (07) Wind Farm Facility Twin Groves II (07) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Horizon Wind Energy Developer Horizon Wind Energy Energy Purchaser Constellation Energy Location McLean County IL Coordinates 40.463317°, -88.64753° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":40.463317,"lon":-88.64753,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

85

Phenomenology of The Left-Right Twin Higgs Model  

E-Print Network [OSTI]

The twin Higgs mechanism has recently been proposed to solve the little hierarchy problem. We study the implementation of the twin Higgs mechanism in left-right models. At TeV scale, heavy quark and gauge bosons appear, with rich collider phenomenology. In addition, there are extra Higgses, some of which couple to both the Standard Model fermion sector and the gauge sector, while others couple to the gauge bosons only. We present the particle spectrum, and study the general features of the collider phenomenology of this class of model at the Large Hadron Collider.

Hock-Seng Goh; Shufang Su

2007-04-30T23:59:59.000Z

86

Phenomenology of the left-right twin Higgs model  

SciTech Connect (OSTI)

The twin Higgs mechanism was proposed recently to solve the little hierarchy problem. We study the implementation of the twin Higgs mechanism in left-right models. At the TeV scale, heavy quark and gauge bosonsappear, with rich collider phenomenology. In addition, there are extra Higgs bosons, some of which couple to both the standard model fermion sector and the gauge sector, while others couple to the gauge bosons only. We present the particle spectrum and study the general features of the collider phenomenology of this class of model at the Large Hadron Collider.

Goh, Hock-Seng; Goh, Hock-Seng; Su, Shufang

2006-11-02T23:59:59.000Z

87

On the role of twinning in solid-state reactions  

SciTech Connect (OSTI)

A new concept of the role of twinning in processes of plastic deformation is proposed which suggests mechanical twinning to be the main mechanism of solid-state reactions under the deformation mixing of components, in particular, the grinding of aluminum oxide (Al{sub 2}O{sub 3}) and yttrium oxide (Y{sub 2}O{sub 3}) powders, as a result of which yttrium-aluminum garnet (Y{sub 3}Al{sub 5}O{sub 12}) particles are formed.

Akchurin, M. Sh., E-mail: akchurin@ns.crys.ras.ru; Zakalyukin, R. M. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

2013-05-15T23:59:59.000Z

88

Examining the mechanics of granulation with a hot melt binder in a twin-screw extruder  

E-Print Network [OSTI]

Examining the mechanics of granulation with a hot melt binder in a twin-screw extruder B. Mu, M processing Melt agglomeration Twin screw extruder a b s t r a c t Hot melt granulation involves particle-rotating intermeshing twin screw extruder for operating temperatures between 80 1C and 120 1C. Three different screw

Thompson, Michael

89

1-twinnings of Buildings Peter Abramenko 1 Hendrik Van Maldeghem 2y  

E-Print Network [OSTI]

1-twinnings of Buildings Peter Abramenko 1#3; Hendrik Van Maldeghem 2y 1 Fakultat fur Mathematik@cage.rug.ac.be Abstract In this paper, we characterize twinnings of buildings by 1-twinnings and various additional in such buildings. Also, special attention is given to the rank 2 case. Mathematics Subject Classi#12;cation 1991

Bielefeld, University of

90

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

Broader source: Energy.gov [DOE]

Presentation by Robert Wichert, US Fuel Cell Council, at the DOD-DOE Aircraft Petroleum Use Reduction Workshop, September 30, 2010, in Washington, DC.

91

PNNL: Research Aircraft Facility (RAF) - FCSD  

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

92

Titanium in fatigue critical military aircraft structure  

SciTech Connect (OSTI)

This paper discusses the effect of fatigue requirements on titanium structure in military aircraft applications, specifically, fighter aircraft. The discussion covers how fatigue affects the design and analysis of detail parts, and how manufacturing processes affect the fatigue performance of titanium structure. Criteria for designing fighter aircraft have evolved from simple strength calculations to extremely complex computer generated analyses involving strength, durability, damage tolerance and fatigue. Fatigue life prediction is an important part of these analyses and dramatically affects the design and weight of fighter aircraft. Manufacturing processes affect fatigue performance both in a positive and negative manner. Designers must allow for the effect of these processes on titanium structure and consider the efficiency and economy of adding processes that increase fatigue life.

Gillespie, F.

1999-07-01T23:59:59.000Z

93

Sandia National Laboratories: Unmanned Aircraft Test Flights...  

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

of around 500 to 1500 feet above ground level. The aircraft can send and receive data up to 10 miles away to deliver high-quality video imagery using color and infrared...

94

Comparative study of nonclassicality, entanglement, and dimensionality of multimode noisy twin beams  

E-Print Network [OSTI]

Nonclassicality, entanglement, as well as dimensionality of a noisy twin beam are determined using characteristic function of the beam written in the Fock basis. One-to-one correspondence between the negativity quantifying entanglement and the nonclassicality depth is revealed. Twin beams, which are either entangled or nonclassical (independent of their entanglement), are observed only for the limited degrees of noise that degrades their quantumness. Dimensionality of the twin beam quantified by the participation ratio is compared with the dimensionality of entanglement determined from the negativity. The partition of the degrees of freedom of the twin beam into those related to entanglement and to noise is suggested. Both single-mode and multimode twin beams are analyzed. Weak nonclassicality based on integrated-intensity quasidistributions of multimode twin beams is studied. Relation of the model to the experimental twin beams is discussed.

I. I. Arkhipov; J. Perina Jr.; J. Perina; A. Miranowicz

2015-01-21T23:59:59.000Z

95

E-Print Network 3.0 - aircraft plume model Sample Search Results  

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

Research in Military Aircraft Emissions Photo of a B-52 bomber taking off (above) and landing... ) Focus on high-payload aircraft Aircraft emissions play a significant...

96

ARM - Facility News Article  

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

January 31, 2006 [Facility News] January 31, 2006 [Facility News] Media Day Kicks Off Tropical Cloud Study in Australia Bookmark and Share While on the ground, the Twin Otter (left) and Proteus (right) are sharing hangar space at the Royal Australian Air Force base for the duration of TWP-ICE field operations. While on the ground, the Twin Otter (left) and Proteus (right) are sharing hangar space at the Royal Australian Air Force base for the duration of TWP-ICE field operations. Two days after a highly successful media day, January 21 marked the official start of flight operations for the Tropical Warm Pool International Cloud Experiment in Darwin, Australia. Science team members are guiding the aircraft missions from the Bureau of Meteorology's Forecast Center in Darwin; the rest of the experiment activities are being managed

97

A time history algorithm for aircraft noise  

Science Journals Connector (OSTI)

In the course of the development of a comprehensive computer airport noisemodel offering a choice of noise metrics (see previous paper) the ASDS metric (Aircraft Sound Description System) required the computation of the time noise levels from aircraft flyover exceed specified thresholds. A package of subroutines was developed that performs a noise level time history simulation by tracking aircraft position and orientation along a three?dimensional flight path using variable time steps depending on the rate of noise level change. The A?weighted noise levels at observer positions are calculated for each time step from two three?dimensional models: a three?component jet engine noise emission model (front fan rear fan jet) where each component varies with engine thrust at a different rate; and a propagation model describing the excess attenuation of A?weighted levels as a function of distance. Both models use aircraft specific empirical parameters determined from measured spectral data and calibrated by comparing calculated and measured maximum A?weighted flyover levels for a range of practical distances. The subroutine package is capable of calculating threshold exceedance times cumulative distributions of noise levels and the time?integrated energy equivalent noise level from an aircraft flyover. [Work supported by the U. S. Department of Transportation.

R. Rackl

1977-01-01T23:59:59.000Z

98

Twin Valley Electric Coop Inc | Open Energy Information  

Open Energy Info (EERE)

Valley Electric Coop Inc Valley Electric Coop Inc Jump to: navigation, search Name Twin Valley Electric Coop Inc Place Kansas Utility Id 18962 Utility Location Yes Ownership C NERC Location SPP NERC SPP Yes RTO SPP Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png All Electric and/or Air Source Heat Pump Commercial Commercial Large Commercial Commercial Small Commercial Farm and Residential Residential Average Rates Residential: $0.1240/kWh Commercial: $0.1510/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=Twin_Valley_Electric_Coop_Inc&oldid=411888"

99

Probing angular momentum coherence in a twin-atom interferometer  

E-Print Network [OSTI]

We propose to use a double longitudinal Stern-Gerlach atom interferometer in order to investigate quantitatively the angular momentum coherence of molecular fragments. Assuming that the dissociated molecule has a null total angular momentum, we investigate the propagation of the corresponding atomic fragments in the apparatus. We show that the envisioned interferometer enables one to distinguish unambiguously a spin-coherent from a spin-incoherent dissociation, as well as to estimate the purity of the angular momentum density matrix associated with the fragments. This setup, which may be seen as an atomic analogue of a twin-photon interferometer, can be used to investigate the suitability of molecule dissociation processes -- such as the metastable hydrogen atoms H($2^2 S$)-H($2^2 S$) dissociation - for coherent twin-atom optics.

de Carvalho, Carlos R; Impens, Franois; Robert, J; Medina, Aline; Zappa, F; Faria, N V de Castro

2014-01-01T23:59:59.000Z

100

Twin Springs Resort Space Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Springs Resort Space Heating Low Temperature Geothermal Facility Springs Resort Space Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Twin Springs Resort Space Heating Low Temperature Geothermal Facility Facility Twin Springs Resort Sector Geothermal energy Type Space Heating Location Boise, Idaho Coordinates 43.6135002°, -116.2034505° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":[]}

Note: This page contains sample records for the topic "twin otter 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

Twin Peaks Motel Space Heating Low Temperature Geothermal Facility | Open  

Open Energy Info (EERE)

Peaks Motel Space Heating Low Temperature Geothermal Facility Peaks Motel Space Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Twin Peaks Motel Space Heating Low Temperature Geothermal Facility Facility Twin Peaks Motel Sector Geothermal energy Type Space Heating Location Ouray, Colorado Coordinates 38.0227716°, -107.6714487° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":[]}

102

MHK Projects/Twin Pond | Open Energy Information  

Open Energy Info (EERE)

Twin Pond Twin Pond < 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":36.7971,"lon":-89.1361,"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":""}]}

103

Aeroacoustics of perforated drag plates for quiet transport aircraft  

E-Print Network [OSTI]

Historically aircraft noise is one of the principal environmental issues for aviation. Within this context, the Silent Aircraft Initiative was launched with the objective to achieve a step-change in noise reduction compared ...

Sakaliyski, Kiril Dimitrov

2005-01-01T23:59:59.000Z

104

Nature's engineering : a blueprint for efficient aircraft design  

E-Print Network [OSTI]

The flight of birds inspired engineers like Leonard da Vinci and Wilbur and Orville Wright to design aircraft that mimic the behavior they observed. The success of the Wright brothers' first controllable aircraft ushered ...

Pineda, Elvine Philip B., II

2011-01-01T23:59:59.000Z

105

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

106

COSET: a program for deriving and testing merohedral and pseudo-merohedral twin laws  

Science Journals Connector (OSTI)

A new computer program which implements left coset decomposition algorithms to derive possible merohedral and pseudo-merohedral twin laws is presented.

Boyle, P.D.

2014-01-30T23:59:59.000Z

107

E-Print Network 3.0 - adolescent twin pairs Sample Search Results  

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

Sample search results for: adolescent twin pairs Page: << < 1 2 3 4 5 > >> 1 Genes, Brain and Behavior (2009) 8: 107113 2009 The Authors Journal compilation 2009 Blackwell...

108

Tank waste information network system II (TWINS2) year 2000 compliance assurance plan  

SciTech Connect (OSTI)

The scope of this plan includes the Tank Waste Information Network System II (TWINS2) that contains the following major components: Tank Characterization Database (TCD), Tank Vapor Database (TVD), Data Source Access (DSA), automated Tank Characterization Report, Best-Basis Inventory Model (BBIM), and Tracker (corrective action tracking) function. The automated Tank Characterization Report application currently in development also will reside on-the TWINS system as will the BBIM. Critical inputs to TWINS occur from the following databases: Labcore and SACS. Output does not occur from TWINS to these two databases.

Adams, M.R.

1998-04-16T23:59:59.000Z

109

Low-Cost Magnesium Sheet Production using the Twin Roll Casting...  

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

using the Twin Roll Casting Process and Asymmetric Rolling 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer...

110

Sedimentology and Holocene stratigraphy of a carbonate mangrove buildup, Twin Cays, Belize, Central America  

E-Print Network [OSTI]

surface sediment sample Clusters 1 and 2. . Twin Cays surface sediment sample Clusters 3 and 4. . Twin Cays surface sediment sample Clusters 5 and 6. . Twin Cays surface sediment sample Clusters 7 and 8. . Twin Cays surface sediment sample Cluster 9...: 1A, 18, 1C, 3, 5, 6, 8, 9, 10, 11, 15, and 17. . . . . . . . . . . . . . 58 LIST OF FIGURES (continued) FIGURE PAGE 16 East to west cross section drawn based upon description of the sediment contained in the cores: 2, 4, 7, 8, 9, 12, 13 and 14. 60...

Bond, Gregor Benton

1988-01-01T23:59:59.000Z

111

DOD-DOE Aircraft Petroleum Use Reduction Workshop Agenda  

Broader source: Energy.gov [DOE]

Workshop agenda for the DOD-DOE Aircraft Petroleum Use Reduction Workshop, September 30, 2010, in Washington, DC.

112

Detection of aeroacoustic sound sources on aircraft and wind turbines  

E-Print Network [OSTI]

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

Twente, Universiteit

113

Advanced Materials for Aircraft Engine Applications  

Science Journals Connector (OSTI)

...strength and long creep lives, as-HIP material...cycle fatigue (LCF) lives. LCF is a failure...landing for an aircraft turbine engine). A classic...ductility and fatigue life. Examination ofLCF-tested...the atomizer, and residual dirt from gas supply lines and...

DANIEL G. BACKMAN; JAMES C. WILLIAMS

1992-02-28T23:59:59.000Z

114

Aircraft Power Generators: Hybrid Modeling and  

E-Print Network [OSTI]

Aircraft Power Generators: Hybrid Modeling and Simulation for Fault Detection ASHRAF TANTAWY University Integrated drive generators (IDGs) are the main source of electrical power for a number, and a majority of the existing FDI techniques for the electrical subsystem (brushless generator) are based

Koutsoukos, Xenofon D.

115

Aircraft Integrity and Reliability Carlos Ferregut  

E-Print Network [OSTI]

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

Kreinovich, Vladik

116

Bayesian Methods for Aircraft Structural Health  

E-Print Network [OSTI]

.1 Introduction Aircraft structures, whether metallic or composite, are subject to service damage which requires on the inspection results obtained. If damage is detected from an inspection, the decision whether to repair as well dynamically, and compared to a model of the structure such that damage can be located and a determination made

Henderson, Thomas C.

117

THE ECONOMIC IMPACT OF A TERRORIST ATTACK ON THE TWIN PORTS OF LOS  

E-Print Network [OSTI]

THE ECONOMIC IMPACT OF A TERRORIST ATTACK ON THE TWIN PORTS OF LOS ANGELES-LONG BEACH Gordon, P.usc.edu/create Report #05-012DRAFT #12;THE ECONOMIC IMPACT OF A TERRORIST ATTACK ON THE TWIN PORTS OF LOS ANGELES International Airport (LAX), downtown high-rises, its theme parks, its freeways, and its ports, among many

Wang, Hai

118

Acoustic attenuation due to transformation twins in CaCl2: Analogue behaviour for stishovite  

E-Print Network [OSTI]

Acoustic attenuation due to transformation twins in CaCl2: Analogue behaviour for stishovite: Pseudoproper ferroelastic phase transition Ferroelastic twin walls Stishovite CaCl2 Acoustic attenuation a b s t r a c t CaCl2 undergoes a tetragonal (P42/mnm) to orthorhombic (Pnnm) transition as a function

Cambridge, University of

119

Ramp meters on trial: Evidence from the Twin Cities metering holiday  

E-Print Network [OSTI]

Ramp meters on trial: Evidence from the Twin Cities metering holiday David Levinson a,*, Lei Zhang; accepted 15 December 2004 Abstract Ramp meters in the Twin Cities have been the subject of a recent test metering for several representative freeways during the afternoon peak period. Seven performance measures

Levinson, David M.

120

EVALUATING EFFECTIVENESS OF RAMP Evidence from the twin cities ramp meter shut-off  

E-Print Network [OSTI]

Chapter 9 EVALUATING EFFECTIVENESS OF RAMP METERS Evidence from the twin cities ramp meter shut-625-6354 Abstract: Ramp meters in the Twin Cities have been turned off for eight weeks in Fall 2000 in an experiment representative freeways during the afternoon peak period. Several performance measures for ramp metering

Levinson, David M.

Note: This page contains sample records for the topic "twin otter 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

New solar twins and the metallicity and temperature scales of the GenevaCopenhagen Survey  

Science Journals Connector (OSTI)

......middle of the box. The solar twin candidates of the...the Sun. While this project was being undertaken...an average of 80 K at solar values and in decreased...been adopted to finding solar twins by groups active...range in the spectral energy distribution (SED......

Juliet Datson; Chris Flynn; Laura Portinari

2012-10-11T23:59:59.000Z

122

* : Hossein Ameri Novel Client Booking System in KLCC Twin Tower Bridge  

E-Print Network [OSTI]

Tower Bridge H. Ameri* University Malaya Center of research and applied electronics, University as well as scheduling tours to visit "Petronas Twin Towers Sky Bridge". The system should at least support of this system are tourist who would like to visit the twin towers sky bridge, system operators that includes

Paris-Sud XI, Université de

123

Understanding wet granulation in the kneading block of twin screw extruders  

E-Print Network [OSTI]

Understanding wet granulation in the kneading block of twin screw extruders H. Li a,1 , M done in a 27 mm twin screw extruder with different powder formulations consisting of lactose H I G H L I G H T S In situ examination of granule development inside extruder. Granule based

Thompson, Michael

124

STATISTICS OF MIXING DISTRIBUTIONS IN FILLED ELASTOMERS PROCESSED BY TWIN SCREW EXTRUSION  

E-Print Network [OSTI]

screw extruder under controlled extruder geometry, order of ingredient addition and die pressurizationC. This formulation was twin screw extruded using an annular die with a star-shaped mandrel (see Fig.1). Three controlSTATISTICS OF MIXING DISTRIBUTIONS IN FILLED ELASTOMERS PROCESSED BY TWIN SCREW EXTRUSION Elvan

125

Wet Granulation in a Twin-Screw Extruder: Implications of Screw Design  

E-Print Network [OSTI]

Wet Granulation in a Twin-Screw Extruder: Implications of Screw Design M.R. THOMPSON, J. SUN MMRI of auxiliary units like feeders and pumps. In comparison, single-screw variants of an extruder have received granulation in twin-screw extrusion machinery is an attractive tech- nology for the continuous processing

Thompson, Michael

126

Discordance of prenatal and neonatal brain development in twins Niyati Mukherjee a  

E-Print Network [OSTI]

about prenatal and early neonatal discordance of head and brain size, and the role that zygosityDiscordance of prenatal and neonatal brain development in twins Niyati Mukherjee a , Chaeryon Kang and chorionicity play in discordances of early brain development in twins. Aims: To compare prenatal and neonatal

Utah, University of

127

Discordance of Prenatal and Neonatal Brain Development in Twins Niyati Mukherjee1  

E-Print Network [OSTI]

neonatal discordance of head and brain size, and the role that zygosity and chorionicity play in discordances of early brain development in twins. Aims: To compare prenatal and neonatal discordances of headDiscordance of Prenatal and Neonatal Brain Development in Twins Niyati Mukherjee1 , Chaeryon Kang1

Utah, University of

128

Effect of twinning on texture evolution of depleted uranium using a viscoplastic self-consistent model  

SciTech Connect (OSTI)

Ductility and fracture toughness is a major stumbling block in using depleted uranium as a structural material. The ability to correctly model deformation of uranium can be used to create process path methods to improve its structural design ability. The textural evolution of depleted uranium was simulated using a visco-plastic self consistent model and analyzed by comparing pole figures of the simulations and experimental samples. Depleted uranium has the same structure as alpha uranium, which is an orthorhombic phase of uranium. Both deformation slip and twin systems were compared. The VPSC model was chosen to simulate this material because the model encompasses both low-symmetry materials as well as twinning in materials. This is of particular interest since depleted uranium has a high propensity for twinning, which dominates deformation and texture evolution. Simulated results were compared to experimental results to measure the validity of the model. One specific twin system, the {l_brace}176{r_brace}[512] twin, was of specific notice. The VPSC model was used to simulate the influence of this twin on depleted uranium and was compared with a mechanically shocked depleted uranium sample. Under high strain rate shock deformation conditions, the {l_brace}176{r_brace}[512] twin system appears to be a dominant deformation system. By simulating a compression process using the VPSC model with the {l_brace}176{r_brace}[512] twin as the dominant deformation mode, a favorable comparison could be made between the experimental and simulated textures. (authors)

Ho, J.; Garmestani, H. [Georgia Inst. of Technology, Atlanta, GA 30332-0245 (United States); Burrell, R.; Belvin, A. [Y-12 National Security Complex, Oak Ridge, TN (United States); Li, D. [Fundamental and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352 (United States); McDowell, D. [Woodruff School of Mechanical Engineering, Atlanta, GA 30332-0245 (United States); Rollett, A. [Dept. of Materials Science and Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213 (United States)

2012-07-01T23:59:59.000Z

129

First-principles calculations of twin-boundary and stacking-fault energies in magnesium  

E-Print Network [OSTI]

First-principles calculations of twin-boundary and stacking-fault energies in magnesium Y. Wang and stacking faults in metal magnesium have been calculated using first-principles supercell approach. Four. Keywords: Magnesium; Interfaces; Twinning; First-principles calculation Magnesium alloys are increasingly

Chen, Long-Qing

130

Structure and motion of junctions between coherent and incoherent twin boundaries in copper  

E-Print Network [OSTI]

Structure and motion of junctions between coherent and incoherent twin boundaries in copper J online 4 July 2009 Abstract The atomic mechanisms of twin boundary migration in copper under externally. ? 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Keywords: Copper

Ghoniem, Nasr M.

131

Mesh immersion technique for 3D moving domain calculation and applications to twin-screw extrusion and mixing  

E-Print Network [OSTI]

in a complex system such as a twin screw extruder or a batch mixer, including moving free surfaces. 1 Fluid, the domain occupied by the fluid inside a portion of a twin screw extruder. The velocity- pressure (u to a twin screw extrud

Paris-Sud XI, Université de

132

Dynamic modeling of the reactive twin-screw co-rotating extrusion process: experimental validation by using inlet  

E-Print Network [OSTI]

and modification.1 The co-rotating twin-screw extruder is of particular interest due to its modular geometry or removing chemical species.3,4 Furthermore, the co-rotating twin-screw extruder can handle high viscosityDynamic modeling of the reactive twin-screw co-rotating extrusion process: experimental validation

Paris-Sud XI, Université de

133

Twin Groves II (08) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Groves II (08) Wind Farm Groves II (08) Wind Farm Jump to: navigation, search Name Twin Groves II (08) Wind Farm Facility Twin Groves II (08) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Horizon Wind Energy Developer Horizon Wind Energy Energy Purchaser Constellation Energy Location McLean County IL Coordinates 40.463317°, -88.64753° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":40.463317,"lon":-88.64753,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

134

Using doppler radar images to estimate aircraft navigational heading error  

DOE Patents [OSTI]

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

135

Wireless Sensor Network for Aircraft Health Monitoring Honeywell Labs  

E-Print Network [OSTI]

Wireless Sensor Network for Aircraft Health Monitoring Haowei Bai Honeywell Labs 3660 Technology Drive Minneapolis, MN 55418 haowei.bai@honeywell.com Mohammed Atiquzzaman School of Computer Science

Minnesota, University of

136

Numerical simulations of a vertical tail of a commercial aircraft...  

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

of a commercial aircraft with active flow control Authors: Rasquin, M., Martin, J., Jansen, K. A series of numerical simulations of a realistic vertical tail of a commercial...

137

Twin Groves I Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Groves I Wind Farm Groves I Wind Farm Facility Twin Groves I Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Developer Horizon Wind Energy Location McLean County IL Coordinates 40.463317°, -88.64753° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":40.463317,"lon":-88.64753,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

138

Twin-screw tanker designed for high efficiency  

SciTech Connect (OSTI)

In late 1994, the Ching Fu shipyard in Taiwan delivered a chemical tanker to Fram Shipping, for operations around Northern Europe for Norsk Hydro. The 13000 dwt tanker design is optimized to have the lowest possible operational cost for the given dead-weight capacity. Waertsilae Propulsion has from an early stage contributed to the development of the propulsion system. The company proposed the Waertsilae Propac concept, including the hydrodynamic design and the supply of the main components. The propeller was designed using in-house computer programs, and the results confirmed by model tests, both at Danish Maritime Institute (DMI) in Copenhagen, and at SSPA Maritime Consulting in Gothenburg. The hull form for the tanker was optimized by a special bulb design to reduce the wave resistance. The vessel is also designed with a special twin skeg arrangement in the stern. This solution allows for two large and efficient propellers to be installed.

NONE

1995-11-01T23:59:59.000Z

139

Performance simulations of twin-screw compressors with economizer  

Science Journals Connector (OSTI)

In a compressor refrigeration plant with an economizer system, the regular expansion valve is replaced by two valves and an intermediate pressure vessel. The refrigerant which is vaporized after the first valve is injected via the compressor economizer inlet to a thread under compression. The economizer arrangement increases the refrigeration capacity and improves the coefficient of performance (COP). In this paper a performance simulation computer program for twin-screw compressors with an economizer arrangement is presented. Comparisons of economizer performance for different arrangements are often difficult to carry out if real tests have not been run, as the performance is dependent on the intermediate pressure and this pressure is not the same for different arrangements. Such comparisons can be made with the simulation program. Examples are presented for an economizer arrangement combined with external liquid subcooling and for a two-stage economizer arrangement.

Sven Jonsson

1991-01-01T23:59:59.000Z

140

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

Note: This page contains sample records for the topic "twin otter aircraft" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Swarms of UAVs and fighter aircraft  

SciTech Connect (OSTI)

This paper describes a method of modeling swarms of UAVs and/or fighter aircraft using particle simulation concepts. Recent investigations into the use of genetic algorithms to design neural networks for the control of autonomous vehicles (i.e., robots) led to the examination of methods of simulating large collections of robots. This paper describes the successful implementation of a model of swarm dynamics using particle simulation concepts. Several examples of the complex behaviors achieved in a target/interceptor scenario are presented.

Trahan, M.W.; Wagner, J.S.; Stantz, K.M.; Gray, P.C.; Robinett, R.

1998-11-01T23:59:59.000Z

142

Radiant Energy Power Source for Jet Aircraft  

SciTech Connect (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

143

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

144

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

Science Journals Connector (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

145

DOE - Office of Legacy Management -- Twin Cities Ammunition - MN 0-01  

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

Twin Cities Ammunition - MN 0-01 Twin Cities Ammunition - MN 0-01 FUSRAP Considered Sites Site: TWIN CITIES AMMUNITION (MN.0-01) Eliminated from further consideration under FUSRAP - Referred to DOD Designated Name: Not Designated Alternate Name: None Location: New Brighton , Minnesota MN.0-01-1 Evaluation Year: 1987 MN.0-01-2 Site Operations: Site was formerly licensed under 10CFR 70 by the NRC. MN.0-01-1 MN.0-01-2 Site Disposition: Eliminated - No Authority - Referred to DOD MN.0-01-1 Radioactive Materials Handled: None Indicated Primary Radioactive Materials Handled: None Radiological Survey(s): None Indicated Site Status: Eliminated from further consideration under FUSRAP - Referred to DOD MN.0-01-2 Also see Documents Related to TWIN CITIES AMMUNITION MN.0-01-1 - DOE Letter; Mott to Spence; Listings of Military

146

Modeling of wet gas compression in twin-screw multiphase pump  

E-Print Network [OSTI]

Twin-screw multiphase pumps experience a severe decrease in efficiency, even the breakdown of pumping function, when operating under wet gas conditions. Additionally, field operations have revealed significant vibration and thermal issues which can...

Xu, Jian

2009-05-15T23:59:59.000Z

147

A twin-plot approach to determine nutrient limitation and potential productivity in Eucalyptus plantations  

E-Print Network [OSTI]

locations (with similar initial wood biomass, ``twin-plot''), providing no experimental replication within plantations at landscape scales in Brazil Jose´ Luiz Stape a,*, Dan Binkley b , Walter S. Jacob c , Ernesto N

Binkley, Dan

148

In 2011, the University of Minnesota's Twin Cities Sustainability Committee developed a campus climate  

E-Print Network [OSTI]

Benefits In 2011, the University of Minnesota's Twin Cities Sustainability Committee developed' Climate Commitment and to implement University of Minnesota sustainability goals. The CAP identifies neutrality by 2050. The Sustainability Committee, a standing body charged by the president

Webb, Peter

149

Design and Construction of a High Pressure System for Evaluating Multiphase Twin-Screw Pumps  

E-Print Network [OSTI]

Twin-screw pumps are currently sold by manufacturers without adequate data predicting the pump behavior when pumping multiphase mixtures. In light of the fact that pump behavior is known to change significantly under these conditions, a new closed...

Hatch, Theodore Isaac

2013-08-26T23:59:59.000Z

150

Performance Evaluation and CFD Simulation of Multiphase Twin-Screw Pumps  

E-Print Network [OSTI]

Twin-screw pumps are economical alternatives to the conventional multiphase system and are increasingly used in the oil and gas industry due to their versatility in transferring the multiphase mixture with varying Gas Void Fraction (GVF). Present...

Patil, Abhay

2013-05-16T23:59:59.000Z

151

Advanced aircraft ignition CRADA final report  

SciTech Connect (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

152

Fault prediction in aircraft engines using Self-Organizing Maps  

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

153

Wind parameters extraction from aircraft trajectories C. Hurtera,  

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

154

Aerodynamic Shape Optimization for Aircraft Design Antony Jameson  

E-Print Network [OSTI]

Aerodynamic Shape Optimization for Aircraft Design Antony Jameson Department of Aeronautics September 6-10, 2004 c A. Jameson 2004 Stanford University, Stanford, CA 1/55 Aerodynamic Shape Optimization for Aircraft Design #12;#12; Aerodynamic Design Tradeoffs A good first estimate of performance is provided

Stanford University

155

E-Print Network 3.0 - aircraft structural design Sample Search...  

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

-equipped aircraft. The paper begins with a brief review of a method for designing a scheduling system that assigns... , control- lers could get aircraft over a designated...

156

E-Print Network 3.0 - aircraft design Sample Search Results  

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

-equipped aircraft. The paper begins with a brief review of a method for designing a scheduling system that assigns... , control- lers could get aircraft over a designated...

157

E-Print Network 3.0 - aircraft conflict resolution Sample Search...  

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

that it work with the current aircraft conflict resolution... and aircraft ... Source: NASA - Center-TRACTION Automation System (CTAS) Collection: Energy Storage, Conversion and...

158

E-Print Network 3.0 - aircraft engine research Sample Search...  

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

A Simulator for Modeling Aircraft Surface Operations at Airports Summary: A Simulator for Modeling Aircraft Surface Operations at Airports Zachary Wood Univ. of Calif... NASA...

159

E-Print Network 3.0 - aircraft ndi development Sample Search...  

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

later, new-concept NDI sensors for commercial aircraft skin inspection. Our prototype robot... Automated NonDestructive Inspector of Aging Aircraft Ian Davis and M. W. Siegel ......

160

E-Print Network 3.0 - aircraft nondestructive inspection Sample...  

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

later, new-concept NDI sensors for commercial aircraft skin inspection. Our prototype robot... , the Automated NonDestructive Inspector (ANDI), holds to the aircraft ... Source:...

Note: This page contains sample records for the topic "twin otter 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

E-Print Network 3.0 - annual international aircraft Sample Search...  

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

. 12;INFLUENCES ON AVIATION EMISSIONS 183 pay for aircraft. Annual transaction prices of aircraft were... Annu. Rev. Energy Environ. 2001. 26:167-200 ... Source: Waitz,...

162

E-Print Network 3.0 - aircraft heat source Sample Search Results  

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

and Utilization 15 26th INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES AN OPTIMIZATION MODEL FOR REDUCING AIRCRAFT TAXI Summary: AIRCRAFT TAXI TIMES AT THE DALLAS FORT...

163

E-Print Network 3.0 - aircraft air pollution Sample Search Results  

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

air pollution Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft air pollution Page: << < 1 2 3 4 5 > >> 1 Research in Military Aircraft...

164

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

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

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

165

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

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

gases FAA, 2005. Water in the aircraft exhaust at altitude may have a greenhouse effect... . Aircraft ... Source: Ecole Polytechnique, Centre de mathmatiques...

166

Improving aircraft composite inspections using optimized reference standards  

SciTech Connect (OSTI)

The rapidly increasing use of composites on commercial airplanes coupled with the potential for economic savings associated with their use in aircraft structures means that the demand for composite materials technology will continue to increase. Inspecting these composite structures is a critical element in assuring this continued airworthiness. The FAA`s Airworthiness Assurance NDI Validation Center, in conjunction with the Commercial Aircraft Composite Repair committee, is developing a set of composite reference standards to be used in NDT equipment calibration for accomplishment of damage assessment and post-repair inspection of all commercial aircraft composites. In this program, a series of NDI tests on a matrix of composite aircraft structures and prototype reference standards were completed in order to minimize the number of standards needed to carry out composite inspections on aircraft. Two tasks, related to composite laminates and non-metallic composite honeycomb configurations, were addressed.

Roach, D.; Dorrell, L. [Sandia National Labs., Albuquerque, NM (United States). FAA Airworthiness Assurance NDI Validation Center; Kollgaard, J. [Boeing Commercial Aircraft Co., Seattle, WA (United States); Dreher, T. [United Airlines (United States)

1998-10-01T23:59:59.000Z

167

Creating a single twin boundary between two CdTe (111) wafers with controlled rotation angle by wafer bonding  

SciTech Connect (OSTI)

The single twin boundary with crystallographic orientation relationship (1{sup }1{sup }1{sup })//(111) [01{sup }1]//[011{sup }] was created by wafer bonding. Electron diffraction patterns and high-resolution transmission electron microscopy images demonstrated the well control of the rotation angle between the bonded pair. At the twin boundary, one unit of wurtzite structure was found between two zinc-blende matrices. High-angle annular dark-field scanning transmission electron microscopy images showed Cd- and Te-terminated for the two bonded portions, respectively. The I-V curve across the twin boundary showed increasingly nonlinear behavior, indicating a potential barrier at the bonded twin boundary.

Sun, Ce; Lu, Ning; Wang, Jinguo; Lee, Jihyung; Peng, Xin; Kim, Moon J., E-mail: moonkim@utdallas.edu [Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Klie, Robert F. [Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607 (United States)] [Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607 (United States)

2013-12-16T23:59:59.000Z

168

Twin-beams digital holography for 3D tracking and quantitative phase-contrast microscopy in microfluidics  

Science Journals Connector (OSTI)

We report on a compact twin-beam interferometer that can be adopted as a flexible diagnostic tool in microfluidic platforms with twofold functionality. The novel configuration allows...

Memmolo, Pasquale; Finizio, Andrea; Paturzo, Melania; Miccio, Lisa; Ferraro, Pietro

2011-01-01T23:59:59.000Z

169

Chemical composition of exhaust from aircraft turbine engines  

SciTech Connect (OSTI)

This paper reports measurement of the chemical composition of exhaust from two aircraft tubing engines. The two engines are the F101, used on the B-1B aircraft, and the F110, used on the F-16C and F-16D aircraft. Samples were collected from each engine using a probe positioned just behind the exhaust nozzle. The measurements reported her were made at four power settings from idle to intermediate power. Exhaust composition measurements included carbon monoxide, carbon dioxide, nitrogen oxides, total hydrocarbons, and individual organic species. The principle focus of this paper is on the detailed organic species results.

Spicer, C.W.; Holdren, M.W.; Smith, D.L. (Battelle, Columbus, OH (US)); Hughes, D.P. (Tinker AFB, Oklahoma City, OK (US)); Smith, M.D. (Environics Div., Tyndall AFB, Panama City, FL (US))

1992-01-01T23:59:59.000Z

170

E-Print Network 3.0 - aircraft gas turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft gas turbines...

171

E-Print Network 3.0 - aircraft turbine engine Sample Search Results  

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

engine Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft turbine engine...

172

Mechanistic Selection and Growth of Twinned Bicrystalline Primary Si in Near Eutectic Al-Si Alloys  

SciTech Connect (OSTI)

Morphological evolution and selection of angular primary silicon is investigated in near-eutectic Al-Si alloys. Angular silicon arrays are grown directionally in a Bridgman furnace at velocities in the regime of 10{sup -3} m/sec and with a temperature gradient of 7.5 x 10{sup 3} K/m. Under these conditions, the primary Si phase grows as an array of twinned bicrystalline dendrites, where the twinning gives rise to a characteristic 8-pointed star-shaped primary morphology. While this primary Si remains largely faceted at the growth front, a complex structure of coherent symmetric twin boundaries enables various adjustment mechanisms which operate to optimize the characteristic spacings within the primary array. In the work presented here, this primary silicon growth morphology is examined in detail. In particular, this thesis describes the investigation of: (1) morphological selection of the twinned bicrystalline primary starshape morphology; (2) primary array behavior, including the lateral propagation of the starshape grains and the associated evolution of a strong <100> texture; (3) the detailed structure of the 8-pointed star-shaped primary morphology, including the twin boundary configuration within the central core; (4) the mechanisms of lateral propagation and spacing adjustment during array evolution; and (5) the thermosolutal conditions (i.e. operating state) at the primary growth front, including composition and phase fraction in the vicinity of the primary tip.

Choonho Jung

2006-12-12T23:59:59.000Z

173

Blasting of the Twin Creek`s highwall failure  

SciTech Connect (OSTI)

On December 26, 1994, at 1:00 a.m., the Twin Creeks Mine experienced a major highwall failure involving over 2.5 million tons. The long chain of events that led up to this failure actually started in late August when a truck driver first noticed the cracks in the highwall. Soon after, an intense survey prism monitoring program was initiated. An electronic, continuous monitor linked to Dispatch was soon in place which monitored the crack that was most likely to fail into the active pit area first. It wasn`t until early December when the graphs started showing greater increases in movement. On December 22, the acceleration curves skied-out. The 600 ft. highwall finally collapsed about three days later and left material spread 800 ft. across the bottom of the pit. Not knowing if the large overhangs above the slide would soon give away sending more material into the pit or if the numerous tension cracks on the surface would result in yet another major failure, it was only after restoring the rigid monitoring program and observing no movement that the company decided to drill and blast the overhanging material. The purpose of the blast wasn`t to cast the material into the pit, but to kick-out the toe so that the weight of material above would fall upon itself. After two months of preparation and almost three weeks of drilling and loading, the shot occurred on March 21, 1995. Approximately one million tons were successfully blasted that day, and presently they have completed mining the slough material itself and reestablished benches from the top.

Gray, C.J.; Bachmann, J.A. [Santa Fe Pacific Gold Corp., Winnemucca, NV (United States). Twin Creeks Mine

1996-12-01T23:59:59.000Z

174

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, Finite Element Approximation, Fluid-Structure Interaction, High Performance Computing, Implosion of Aircraft Structures, Stanford University 2007- Director, Army High Performance Computing Research Center

Farhat, Charbel

175

High-order computational fluid dynamics tools for aircraft design  

Science Journals Connector (OSTI)

...sustainable (green) aviation. In Recent advances in aircraft technology (ed...applications. In 47th AIAA Aerospace Sciences Meeting, AIAA 2009-176...mechanics. In Proc. 47th AIAA Aerospace Sciences Meeting and Exhibit. AIAA Paper...

2014-01-01T23:59:59.000Z

176

Rankline-Brayton engine powered solar thermal aircraft  

DOE Patents [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

177

Rankine-Brayton engine powered solar thermal aircraft  

DOE Patents [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)

2009-12-29T23:59:59.000Z

178

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

E-Print Network [OSTI]

Nov 12, 2001 ... Aircraft can only be swapped if they are of the same type, except Boeing. 757 and 767 , which can be swapped. Only cancel here-and-back...

2001-11-12T23:59:59.000Z

179

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...

Bokadia, Sangeeta

2012-06-07T23:59:59.000Z

180

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

Note: This page contains sample records for the topic "twin otter 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

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

Office of Legacy Management (LM)

Year: 1987 CA.0-02-1 CA.0-02-2 Site Operations: Participated in projects involving nuclear energy for the propulsion of aircraft. CA.0-02-1 Site Disposition: Eliminated - No...

182

Review Lecture: The Technical Aspects of Supersonic Civil Transport Aircraft  

Science Journals Connector (OSTI)

...conventional subsonic civil aircraft. The physical, economic and ecological environments in which the supersonic transport must operate...experiment, of the practical parameters and features for such a vehicle. The Royal Society is collaborating with JSTOR to digitize...

1974-01-01T23:59:59.000Z

183

Aspects of Aging Aircraft: A TransAtlantic View  

Science Journals Connector (OSTI)

This paper will discuss from a regulatory viewpoint some of the key technical matters in the ageing aircraft issue. Attention is focused primarily on research topics of interest, for an overview of the CAA app...

John W. Bristow

1991-01-01T23:59:59.000Z

184

Microsoft PowerPoint - arm_flare.ppt  

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

TECHNIQUE FOR STUDYING AEROSOL-CLOUD TECHNIQUE FOR STUDYING AEROSOL-CLOUD INTERACTIONS IN MARINE STRATOCUMULUS Virendra P. Ghate 1 , Bruce A. Albrecht 1 , Pavlos Kollias 2 1. MPO/RSMAS, Univ. of Miami, FL; 2. Brookhaven National Laboratory, NY 1. Introduction A cloud seeding experiment conducted offshore of Monterey, California in June 2006 aimed to study aerosol interaction with marine stratocumulus clouds. Instrument loaded Center for Interdisciplinary and Remotely Piloted Aircraft Studies (CIRPAS)'s Twin Otter Research Aircraft was used for cloud observations, while Weather Modification Inc. (WMI)'s Cheyenne-II aircraft was used for seeding purposes. Temp., Press., Wind, Humidity sensors. Met. Suit 25 µm to 1500 µm, 62 channel Cloud Imaging Probe (CIP) 2.25 µm to 40 µm, 20 channel Forward Scattering

185

Direct extraction of oil from sunflower seeds by twin-screw extruder according to an aqueous extraction process: Feasibility  

E-Print Network [OSTI]

Direct extraction of oil from sunflower seeds by twin-screw extruder according to an aqueous the feasibility of an aqueous process to extract sunflower seed oil using a co-rotating twin-screw extruder. Aqueous extraction was carried out using whole seeds and the influence of the operating conditions on oil

Paris-Sud XI, Université de

186

Traffic Equilibration: The Case of the Twin Cities Ramp Meter Shut Off David Levinson1and Atif Sheikh2  

E-Print Network [OSTI]

Traffic Equilibration: The Case of the Twin Cities Ramp Meter Shut Off David Levinson1and Atif Sheikh2 Abstract In Fall 2000, more than 430 ramp meters in the Twin Cities metropolitan area were shut down in order to evaluate the effectiveness of the metering system. This shutdown disturbed normal

Levinson, David M.

187

Pinning in twin boundaries of YBa sub 2 Cu sub 3 O sub 7-. delta. single crystals  

SciTech Connect (OSTI)

We present direct observation of Lorentz force induced flux motion and pinning by twin boundaries in single crystal YBa{sub 2}Cu{sub 3}O{sub 7 {minus}{delta}}. From AC magnetoresistance measurements, we derive the effective pinning potential attributed to twin boundaries. 7 refs., 3 figs.

Kwok, W.K.; Welp, U.; Vandervoort, K.G.; Crabtree, G.W. (Argonne National Lab., IL (USA)); Liu, J.Z. (California Univ., Davis, CA (USA). Dept. of Physics); Brooks, J.; Hettinger, J.; Hannahs, S.T. (Boston Univ., MA (USA). Dept. of Physics); Fleshler, S. (Argonne National Lab., IL (USA) Purdue Univ., Lafayette, IN (USA))

1990-01-01T23:59:59.000Z

188

Foreland signature of indenter tectonics: Insights from calcite twinning analysis in the Tennessee salient of the Southern Appalachians, USA  

Science Journals Connector (OSTI)

...paleomagnetic cores using a portable, gasoline-powered drill, and oriented...most accurate results, only straight, continuous twin sets were...twins are typically thin and straight. Unlike samples from the fold-and-thrust...indenter, which was seen in all runs of the experiment. Whereas...

James S. Hnat; Ben A. van der Pluijm

189

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

E-Print Network [OSTI]

of Computational Aero-acoustics, Phil Joseph, Professor of acoustical engineering and turbo-machinery noise and Dr aircraft worth £2.0 trillion; the UK will retain or expand its current 17 per cent share of this m

Sóbester, András

190

Concentration profiles across twin boundaries in YBa{sub 2}Cu{sub 3}O{sub 6+{delta}}  

SciTech Connect (OSTI)

Twin boundaries in polycrystalline YBa{sub 2}Cu{sub 3}O{sub 6+{delta}} have been studied by atom-probe field-ion microscopy. Oxygen depletion at a twin boundary in a {delta}=0.6 material was observed. The width of the depleted region was 6{endash}7 nm. It agrees well with the width of oxygen depletion calculated from the oxygen-depleted twin boundary model by Jou and Washburn. However, a twin boundary in a {delta}=0.9 material did not show any oxygen depletion. This study provides direct evidence of oxygen depletion at twin boundaries in polycrystalline YBa{sub 2}Cu{sub 3}O{sub 6+{delta}} ceramics. {copyright} {ital 1997} {ital The American Physical Society}

Hu, Q.; Stiller, K.; Olsson, E.; Andren, H. [Department of Physics, Chalmers University of Technology and University of Goeteborg, S-412 96 Goeteborg (Sweden)] [Department of Physics, Chalmers University of Technology and University of Goeteborg, S-412 96 Goeteborg (Sweden); Berastegui, P.; Johansson, L. [Department of Inorganic Chemistry, Chalmers University of Technology and University of Goeteborg, S-412 96 Goeteborg (Sweden)] [Department of Inorganic Chemistry, Chalmers University of Technology and University of Goeteborg, S-412 96 Goeteborg (Sweden)

1997-11-01T23:59:59.000Z

191

Relative pinning strength of twin boundaries and outgrowths in YBa2Cu3O7 thin films and superlattices  

Science Journals Connector (OSTI)

YBa2Cu3O7 films and superlattices displaying various structural properties were synthesized. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy characterization reveal that the defect densities can be changed over a large range of magnitude. In particular, by controlling the strain relaxation in the material, superlattices without twin boundaries as well as highly twinned ones are deposited. ac susceptibility measurements are performed on many samples. Using a recent procedure based on flux-creep models, the relaxation rate of the vortices as a function of temperature is plotted in the region of large creep. The qualitative correlation between the defects densities (outgrowths, twins) and the pinning properties provides a description of the pinning landscape. Twin boundaries seem to play a preponderant role in vortex pinning. Intersections between the twin planes are believed to be the main pinning sites when present in our samples.

S. Berger, D-G. Crt, J-P. Contour, K. Bouzehouane, J-L. Maurice, and O. Durand

2001-03-19T23:59:59.000Z

192

Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling  

E-Print Network [OSTI]

Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency. We report on the first experimental realization of a Twin-Signal-Recycling Michelson interferometer and also its broadband enhancement by squeezed light injection. The complete setup was stably locked and a broadband quantum noise reduction of the interferometers shot noise by a factor of up to 4\\,dB was demonstrated. The system was characterized by measuring its quantum noise spectra for several tunings of the TSR cavities. We found good agreement between the experimental results and numerical simulations.

Andr Thring; Christian Grf; Henning Vahlbruch; Moritz Mehmet; Karsten Danzmann; Roman Schnabel

2010-05-25T23:59:59.000Z

193

Quantum Key Ditribution Based on Quantum Intensity Correlation of Twin Beams  

E-Print Network [OSTI]

A new and simple quantum key distribution scheme based on the quantum intensity correlation of optical twin beams and the directly local measurements of intensity noise of single optical beam is presented and experimentally demonstrated. Using the twin beams with the quantum intensity correlation of 5dB the effective bit rate of $2\\times 10^7bits/s$ is completed. The noncloning of quantum systems and the sensitivity of the existing correlations to losses provide the physical mechamism for the security against eavesdropping. In the presented scheme the signal modulation and homodyne detection are not needed.

Xiaojun Jia; Xiaolong Su; Qing Pan; Kunchi Peng; Changde Xie

2005-04-08T23:59:59.000Z

194

The Development of a CFD Program to Model the Pressure Distribution of a Nanocomposite Melt Flow through a Twin-Screw Extruder  

E-Print Network [OSTI]

through a Twin-Screw Extruder Craig Lewandowski University of Minnesota Latin Honors Thesis Academic Year. The manifold analyzed is attached to the twin-screw extruder associated with the NASA Oriented Nanocomposite project with the University of Maryland (College Park). A Werner & Pfleiderer 28mm twin-screw extruder

Dumitrica,Traian

195

Twinned or not twinned, that is the question: crystallization and preliminary crystallographic analysis of the 2F13F1 module pair of human fibronectin  

Science Journals Connector (OSTI)

Native, bacterial-peptide-bound and heavy-atom derivative crystals of the 2F13F1 module pair of human fibronectin have been crystallized in a tetragonal space group (P4212, P41212 or P43212), with unit-cell parameters a = b = 37, c = 108 ?. Data were collected to high-resolution limits of between 2.2 and 1.7 ?. Six different tests were performed to test for possible twinning in the crystals.

Rudi?o-Pi?era, E.

2004-06-22T23:59:59.000Z

196

Single Higgs boson production at the ILC in the left-right twin Higgs model  

E-Print Network [OSTI]

In this work, we analyse three dominant single SM-like Higgs boson production processes in the left-right twin Higgs model (LRTHM): the Higgs-strahlung (HS) process $e^{+}e^{-}\\rightarrow Zh$, the vector boson fusion (VBF) process $e^{+}e^{-}\\rightarrow \

Liu, Yao-Bei

2014-01-01T23:59:59.000Z

197

On the theory of type-I superconductor surface tension and twinning-plane-superconductivity  

E-Print Network [OSTI]

447 On the theory of type-I superconductor surface tension and twinning-plane-superconductivity T du paramètre de Landau-Ginsburg 03BA est trouvée pour la tension de surface des supraconducteurs de. Abstract. 2014 A correction is found to the surface tension in type-I superconductors which is proportional

Boyer, Edmond

198

Giant Narrowband Twin-Beam Generation along the Pump Energy Propagation  

E-Print Network [OSTI]

Walk-off effects, originating from the difference between the group and phase velocities, limit the efficiency of nonlinear optical interactions. While transverse walk-off can be eliminated by proper medium engineering, longitudinal walk-off is harder to avoid. In particular, ultrafast twin- beam generation via pulsed parametric down-conversion (PDC) and four-wave mixing (FWM) is only possible in short crystals or fibres or in double-path schemes. Here we show that in high-gain PDC, one can overcome the destructive role of both effects and even turn them into useful tools for shaping the emission. In our experiment, one of the twin beams is emitted along the pump Poynting vector or its group velocity matches that of the pump. The result is dramatically enhanced generation of both twin beams, with the simultaneous narrowing of angular and frequency spectrum. The effect will enable efficient generation of ultrafast twin photons and beams in cavities, waveguides, and whispering-gallery mode resonators.

Perez, Angela M; Sharapova, Polina R; Tikhonova, Olga V; Leuchs, Gerd; Chekhova, Maria V

2014-01-01T23:59:59.000Z

199

Twin Screw Extrusion Processing of Energetic Materials AIChE Annual Meeting  

E-Print Network [OSTI]

Twin Screw Extrusion Processing of Energetic Materials AIChE Annual Meeting San Francisco, CA, and the mathematical modeling of the thermo-mechanical history of the energetic formulations in the extruder and bulk distortions of extrudates, the formation of hot spots, the important role played

200

Subjective response to low?frequency aircraft noise  

Science Journals Connector (OSTI)

The standard metric currently in use by the U.S. government for community noise from aircraft is the day?night level (DNL) which is based on the A?weighting network. However residents of communities near airports have reported annoyance due to aircraft noise in greater proportion than what the DNL contour associated with their address predicts. Complaints of distant rumbling appear to be related to the low?frequency noise that aircraft produce for which the DNL metric does not fully account. This presentation discusses measurements made in October 2004 at two residences near runways at Washington?Dulles International Airport. Noise data are recorded both inside and outside the structures allowing for a measure of the events impact both inside and outside the structure as well as the filtering effect of the structure on the signal. Laboratory subjective evaluation studies of the recorded aircraft signatures are conducted. Objective metrics those that are designed for low?frequency noise and those that are not are calculated and correlated with subjective rankings of the signatures. This gauges the metrics effectiveness in predicting subjective perception of aircraft noise signatures. [Work supported by the Federal Aviation Administration and the Exploratory and Foundational Program of the Applied Research Laboratory Penn State University.

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Aircraft tracking by means of the Acoustical Doppler Effect  

Science Journals Connector (OSTI)

The present paper presents a passive acoustic method for aircraft tracking. The Acoustical Doppler Effect, characteristic of signals received by a mesh of spatially distributed microphones is the basis of the method. A one-dimensional version of the Ambiguity function permits the calculation of the frequency stretch factor that exists between the sound signals received by a pair of microphones. The expression for this frequency stretch is a function of the aircraft position and velocity which are estimated by a Genetic Algorithm. The method is suitable for all kinds of aircraft and requires only seven microphones plus the prior knowledge of only the aircraft position and velocity at a given time. Results are given for a simulation test of a 3D straight trajectory of the aircraft and for a sound-propagation model which considers geometrical spreading and atmospheric absorption of sound for a homogeneous medium. The influence of the atmospheric absorption is evaluated and the independence of the method with respect to microphone distribution is proven. The performance of the tracking method has also been evaluated in front of possible inaccuracy on the microphones synchronization.

Sara R. Martn; Meritxell Genesc; Jordi Romeu; Teresa Pmies

2013-01-01T23:59:59.000Z

202

MASS-ANGULAR-MOMENTUM RELATIONS IMPLIED BY MODELS OF TWIN PEAK QUASI-PERIODIC OSCILLATIONS  

SciTech Connect (OSTI)

Twin peak quasi-periodic oscillations (QPOs) appear in the X-ray power-density spectra of several accreting low-mass neutron star (NS) binaries. Observations of the peculiar Z-source Circinus X-1 display unusually low QPO frequencies. Using these observations, we have previously considered the relativistic precession (RP) twin peak QPO model to estimate the mass of the central NS in Circinus X-1. We have shown that such an estimate results in a specific mass-angular-momentum (M - j) relation rather than a single preferred combination of M and j. Here we confront our previous results with another binary, the atoll source 4U 1636-53 that displays the twin peak QPOs at very high frequencies, and extend the consideration to various twin peak QPO models. In analogy to the RP model, we find that these imply their own specific M - j relations. We explore these relations for both sources and note differences in the {chi}{sup 2} behavior that represent a dichotomy between high- and low-frequency sources. Based on the RP model, we demonstrate that this dichotomy is related to a strong variability of the model predictive power across the frequency plane. This variability naturally comes from the radial dependence of characteristic frequencies of orbital motion. As a consequence, the restrictions on the models resulting from observations of low-frequency sources are weaker than those in the case of high-frequency sources. Finally we also discuss the need for a correction to the RP model and consider the removing of M - j degeneracies, based on the twin peak QPO-independent angular momentum estimates.

Toeroek, Gabriel; Bakala, Pavel; Sramkova, Eva; Stuchlik, Zdenek; Urbanec, Martin; Goluchova, Katerina, E-mail: pavel.bakala@fpf.slu.cz, E-mail: martin.urbanec@fpf.slu.cz, E-mail: zdenek.stuchlik@fpf.slu.cz, E-mail: terek@volny.cz, E-mail: sram_eva@centrum.cz [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezrucovo nam. 13, CZ-746 01 Opava (Czech Republic)

2012-12-01T23:59:59.000Z

203

Finite-difference modeling of commercial aircraft using TSAR  

SciTech Connect (OSTI)

Future aircraft may have systems controlled by fiber optic cables, to reduce susceptibility to electromagnetic interference. However, the digital systems associated with the fiber optic network could still experience upset due to powerful radio stations, radars, and other electromagnetic sources, with potentially serious consequences. We are modeling the electromagnetic behavior of commercial transport aircraft in support of the NASA Fly-by-Light/Power-by-Wire program, using the TSAR finite-difference time-domain code initially developed for the military. By comparing results obtained from TSAR with data taken on a Boeing 757 at the Air Force Phillips Lab., we hope to show that FDTD codes can serve as an important tool in the design and certification of U.S. commercial aircraft, helping American companies to produce safe, reliable air transportation.

Pennock, S.T.; Poggio, A.J.

1994-11-15T23:59:59.000Z

204

eGSE America: Electric Aircraft Cargo Conveyor Technical Specification  

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

205

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

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

206

An approach to predict operational performance of airline schedules using aircraft assignment key performance indicators  

E-Print Network [OSTI]

This thesis presents an approach for predicting operational performance of airlines on the basis of flight schedules and aircraft assignments. The methodology uses aggregate measures of properties of aircraft assignments, ...

Riedel, Robin

2006-01-01T23:59:59.000Z

207

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

E-Print Network [OSTI]

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

Dicara, Daniel L

2006-01-01T23:59:59.000Z

208

Biplane to monoplane: twenty years of technological development in British fighter aircraft, 1919-1939  

E-Print Network [OSTI]

In the summer of 1940 around five thousand aircraft clashed during several months for control of the skies over Britain. The fighter aircraft used by the German Luftwaffe and British Royal Air Force were, for the most ...

Kelly, Paul

2014-07-01T23:59:59.000Z

209

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

E-Print Network [OSTI]

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

Almor, Amit

210

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

211

E-Print Network 3.0 - aircraft icing training Sample Search Results  

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

Summary: effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice accretions can still build up and affect the aircraft...

212

E-Print Network 3.0 - attack aircraft Sample Search Results  

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

Summary: effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice accretions can still build up and affect the aircraft...

213

E-Print Network 3.0 - aircraft deicing fluid Sample Search Results  

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

Summary: effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice accretions can still build up and affect the aircraft...

214

E-Print Network 3.0 - aircraft surveys Sample Search Results  

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

Summary: effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice accretions can still build up and affect the aircraft...

215

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

E-Print Network [OSTI]

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

Yutko, Brian M. (Brian Matthew)

2014-01-01T23:59:59.000Z

216

Capturing the Impact of Fuel Price on Jet Aircraft Operating Costs with Engineering and Econometric Models  

E-Print Network [OSTI]

Capturing the Impact of Fuel Price on Jet Aircraft OperatingCapturing the Impact of Fuel Price on Jet Aircraft Operatingare in part due to fuel price uncertainty. To address this

Smirti Ryerson, Megan; Hansen, Mark

2009-01-01T23:59:59.000Z

217

E-Print Network 3.0 - aircraft missiles weapons Sample Search...  

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

Naval Research Summary: Program managers 467 Program managers Aircraft carriers Combat boots Combat ships Submarines Weapons... Axisymmetric Missile Configuration Hypersonic...

218

E-Print Network 3.0 - aircraft exhaust aerosol Sample Search...  

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

Nucleus Counter: Instrumental Characterization and Stratospheric Measurements Summary: atmospheric pollution sources like aircraft exhaust plumes. The COPAS instrument has been...

219

Feasibility Analysis of Aircraft Landing Scheduling for Non-Controlled Airports  

E-Print Network [OSTI]

Feasibility Analysis of Aircraft Landing Scheduling for Non-Controlled Airports AIAA-2004 airports Air traffic control automation system development Trajectory analysis Aircraft landing scheduling aircraft scheduling will become the key operational issue at non-controlled airports as the operation

Valasek, John

220

Aerodynamically Optimal Regional Aircraft Concepts: Conventional and Blended Wing-Body Designs  

E-Print Network [OSTI]

Aerodynamically Optimal Regional Aircraft Concepts: Conventional and Blended Wing-Body Designs aircraft such as those that serve regional routes. We thus explore the optimal aerodynamic shape of both a blended wing-body and conventional tube-and-wing regional aircraft through high-fidelity aerodynamic shape

Zingg, David W.

Note: This page contains sample records for the topic "twin otter 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

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

E-Print Network [OSTI]

There is no greater task for a Weight Control Engineer than determining an aircrafts weight and center of gravity (CG). Although the concept of balance or CG is easy to grasp, calculating or measuring it for complex objects, such as an aircraft...

Brown, Patrick M.

2007-05-18T23:59:59.000Z

222

Fuel-Burn Impact of Re-Designing Future Aircraft with Changes in Mission Specifications  

E-Print Network [OSTI]

., with permission. AIAA SciTech #12;SA Single aisle aircraft SFC Engine specific fuel consumption Sref Reference.S.A. Over the past few years, pressure to reduce the overall fuel consumption of the commer- cial aircraftFuel-Burn Impact of Re-Designing Future Aircraft with Changes in Mission Specifications Anil

Alonso, Juan J.

223

Morphological, thermal, rheological, and mechanical properties of polypropylene-nanoclay composites prepared from masterbatch in a twin screw extruder  

Science Journals Connector (OSTI)

A commercial homopolymer polypropylene was melt blended with commercial nanoclay masterbatch at different concentrations of nanoclay using twin screw extruder (TSE). The ... 10, and 15wt%) of the nanoclay on the...

Achmad Chafidz; Mohammad Al-haj Ali; Rabeh Elleithy

2011-09-01T23:59:59.000Z

224

Advanced numerical methods for analysis and design in aircraft aerodynamics  

Science Journals Connector (OSTI)

A review is presented of developments in recent years in computational methods for aerodynamic design and analysis. The discussion is mainly influenced by the industrial requirements and developments at Dornier. The need and use of computational aerodynamics in the design of aircraft and missile configurations is explored through several examples. These include synthesis-programs and predesign and evaluation work of aircraft and missile weapon systems, airfoil and high lift analysis and deign methodologies, three-dimensional transport- and fighter aircraft wing-body analysis methods for the complete speed range from subsonic to supersonic speed even including leading edge vortex flows, engine-inlet flows and interference problems. Besides the importance of advanced numerical schemes and fast large computers the cost-limiting factor of complex geometry handling and data pre- and post-processing is discussed. The use of these numerical methods has proved to substantially increase aircraft performance capabilities while reducing risk, flow time, and testing requirements and thus total costs. At the same time such methods are in use to analyse and improve current and future wind tunnel limitations like wall effects, flow angularity, and Reynolds number.

W. Schmidt

1986-01-01T23:59:59.000Z

225

Stochastic Gust Analysis Techniques for Aircraft Conceptual Design  

E-Print Network [OSTI]

employs Lyapunov and matched filter theory methods to address the stochastic nature of the gust response loads are already being incorporated into commercial aircraft; future environ- mental prospects demand, Massachusetts Institute of Technology. §Professor, AIAA Fellow, Department of Aeronautics and Astronautics, St

Stanford University

226

Safe Set Protection and Restoration for Unimpaired and Impaired Aircraft  

E-Print Network [OSTI]

/s T engine thrust, lb e elevator position, deg m vehicle mass, slugs Iy principal moment of inertia Y within the safe set. When an aircraft is impaired, e.g., a jammed elevator or an engine loss, the safe@technosci.com. 1 of 9 American Institute of Aeronautics and Astronautics #12;(x) cost function associated with time

Kwatny, Harry G.

227

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network [OSTI]

1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

228

Directivity and spectral characteristics of aircraft noise during landing operations  

Science Journals Connector (OSTI)

Recordings of aircraft landing operations have been analyzed to obtain directivity and spectralcharacteristics of the noise emitted during these operations. The recordings were made with a widely spaced microphone array positioned near and parallel to the 19R runway at Washington?Dulles International Airport. In addition the landings were recorded with a video camera to obtain positional data of the aircraft. Given an aircrafts position and velocity along the runway the signal at each microphone is corrected for retarded time spherical spreading and Doppler shift. The corrected signals are combined to establish a directivity pattern and third?octave analysis is performed to obtain spectralcharacteristics. The results of this analysis are intended to be used as input to airport noise modeling software such as the Integrated Noise Model (INM) which currently models landing noise using forward?thrust input data. The current analysis should provide more realistic directivity and spectra for the reverse?thrust condition. [Work supported by the Federal Aviation Administration and the Applied Research Laboratory Exploratory and Foundational Research Program.

2007-01-01T23:59:59.000Z

229

High-order computational fluid dynamics tools for aircraft design  

Science Journals Connector (OSTI)

...future growth in aviation, reducing fuel burn, GHG emission and noise become imperative...aggressive goals in aircraft performance, fuel burn, GHG emission and noise, which is an...doi:10.1006/jcph.2000.6478 ) 45 Roe, PL . 1981 Approximate Riemann solvers...

2014-01-01T23:59:59.000Z

230

Aircraft Measurements of the Concentration and Flux of Agrochemicals  

Science Journals Connector (OSTI)

Aircraft Measurements of the Concentration and Flux of Agrochemicals ... The use of agrochemicals, such as insecticides and herbicides, is of great environmental concern. ... To quantify and model the volatilization and deposition of these agrochemicals, measurements of the exchange rates between the atmosphere and different surfaces are required. ...

T. Zhu; R. L. Desjardins; J. I. MacPherson; E. Pattey; G. St. Amour

1998-03-07T23:59:59.000Z

231

The Sun-like activity of the solar twin 18 Scorpii  

E-Print Network [OSTI]

We present the results of 10 yr of complementary spectroscopic and photometric observations of the solar twin 18 Scorpii. We show that over the course of its ~7 year chromospheric activity cycle, 18 Sco's brightness varies in the same manner as the Sun's and with a likely brightness variation of 0.09%, similar to the 0.1% decadal variation in the total solar irradiance.

Jeffrey C. Hall; Gregory W. Henry; G. Wesley Lockwood

2007-03-16T23:59:59.000Z

232

Modelica-based modeling and simulation of a twin screw compressor for heat pump applications  

Science Journals Connector (OSTI)

Abstract A new twin screw compressor has been developed by SRM (Svenska Rotor Maskiner) for use in a new high temperature heat pump using water as refrigerant. This article presents a mathematical model of the thermodynamic process of compression in twin screw compressors. Using a special discretization method, a transient twin screw compressor model has been developed using Modelica in order to study the dry compression cycle of this machine at high temperature levels. The pressure and enthalpy evolution in the control volumes of the model are calculated as a function of the rotational angle of the male rotor using energy and continuity equations. In addition, associated processes encountered in real machines such as variable fluid leakages, water injection and heat losses are modeled and implemented in the main compressor model. A comparison is performed using the model developed, demonstrating the behavior of the compressor and the evolution of its different parameters in different configurations with and without water injection. This comparison shows the need for water injection to avoid compressor failure and improve its efficiency.

Marwan Chamoun; Romuald Rulliere; Philippe Haberschill; Jean-Louis Peureux

2013-01-01T23:59:59.000Z

233

1  

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

Broadband and Spectral Shortwave Calibration Results Broadband and Spectral Shortwave Calibration Results from ARESE II J. J. Michalsky, P. W. Kiedron, and J. L. Berndt State University of New York Albany, New York T. L. Stoffel, D. Myers, I. Reda, J. A. Treadwell, and A. Andreas National Renewable Energy Laboratory Golden, Colorado Introduction The second Atmospheric Radiation Measurement (ARM) Enhanced Radiation Experiment (ARESE II) was designed differently than the first. A single aircraft was used to fly near the surface (this is below cloud on cloudy days) between 100 to 400 m above ground and at the Twin Otter's altitude ceiling around 7 km; this is above cloud level except for occasional high cirrus. The aircraft flew the low altitude (albedo) runs at the beginning and/or end of the flight. Most of the flying time was spent at high

234

Modeling of a Signal Processing System for Aircraft Air Data  

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

235

DOD-DOE Aircraft Petroleum Use Reduction Workshop Agenda  

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

236

Characterization of aircraft noise during thrust reverser engagement  

Science Journals Connector (OSTI)

Airport noise impact on communities has been an area of considerable study. However it has been determined that thrust reverser engagement is an area requiring further research. This paper presents findings on thrust reverser from a noise study done at Washington?Dulles International Airport (IAD) in October of 2004. Previous studies have found that high levels of acoustic energy in commercial aircraft during takeoff are contained below 300 Hz [Sharp Ben H. Guovich Yuri A. and Albee William W. Status of Low?Frequency Aircraft Noise Research and Mitigation Wyle Report WR 01?21 San Francisco September 2001]. Preliminary analysis of thrust reverser signatures indicates similar findings. A categorization of aircraft noise during thrust reverser engagement is given and looks at factors that may affect the noise characteristics. Some of these factors include: plane type engine type and thrust ratings. In addition a brief analysis of frequency weightings of the Equivalent Sound Level (Leq) and Sound Exposure Level (SEL) metrics and their application to thrust reverser noise is discussed. [Work supported by the Federal Aviation Administration.

2005-01-01T23:59:59.000Z

237

Predicting fatigue resistance of nano-twinned materials: Part I Role of cyclic slip irreversibility and Peierls stress  

Science Journals Connector (OSTI)

Abstract A combined atomistic and meso-scale model is forwarded to capture the cyclic slip mechanism related to fatigue crack propagation in nano-twinned Ni, Cu and Al. Molecular dynamics simulations have unfolded the importance of cyclic sliptwin interactions and associated slip irreversibilities. Annihilation of cyclic slip, as triggered by forward and reverse plastic flow resistances across a twin boundary, has been found to be the principal cause of irreversibilities. An energetics perspective of relative differences in cyclic flow impedance is provided in terms of generalized stacking fault energies (GSFE). Localized stress concentration of a twin boundary and/or a residual dislocation has been found to modify the intrinsic GSFE levels. A PeierlsNabarro framework is employed to convert the fault energy consideration into lattice frictional stresses for unobstructed as well as twin-restricted dislocation glide. Mechanistic implications as well as potential use of current findings are discussed in the context of continuum fatigue threshold prediction to be implemented in Part II of this study.

Piyas B. Chowdhury; Huseyin Sehitoglu; Richard G. Rateick

2014-01-01T23:59:59.000Z

238

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

SciTech Connect (OSTI)

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

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

1998-08-01T23:59:59.000Z

239

Equivalence between squeezed-state and twin-beam communication channels  

E-Print Network [OSTI]

We show the equivalence between two different communication schemes that employ a couple of modes of the electromagnetic field. One scheme uses unconventional heterodyne detection, with correlated signal and image-band modes in a twin-beam state from parametric downconversion. The other scheme is realized through a complex-number coding over quadrature-squeezed states of two uncorrelated modes, each detected by ordinary homodyning. This equivalence concerns all the stages of the communication channel: the encoded state, the optimal amplifier for the channel, the master equation modeling the loss, and the output measurement scheme. The unitary transformation that connects the two communication schemes is realized by a frequency conversion device.

Giacomo Mauro D'Ariano; Massimiliano Sacchi

1997-04-17T23:59:59.000Z

240

Quantum accelerometer: Distinguishing inertial Bob from his accelerated twin Rob by a local measurement  

Science Journals Connector (OSTI)

A single quantum system, such as the Unruh-DeWitt detector, can be used to determine absolute acceleration by local measurements on a quantum field. To show this, we consider two kinematically indistinguishable scenarios: an inertial observer, Bob, measuring the field of a uniformly accelerated cavity, and his noninertial twin, Rob, accelerating and making measurements in a stationary cavity. We find that these scenarios can be distinguished in the nonrelativistic regime only by measurements on highly excited massive fields, allowing one to detect the noninertialness of the reference frame.

Andrzej Dragan; Ivette Fuentes; Jorma Louko

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Muon decays in the Earth's atmosphere, differential aging and the paradox of the twins  

E-Print Network [OSTI]

Observation of the decay of muons produced in the Earth's atmosphere by cosmic ray interactions provides a graphic illustration of the counter-intuitive space-time predictions of special relativity theory. Muons at rest in the atmosphere, decaying simultaneously, are subject to a universal time-dilatation effect when viewed from a moving frame and so are also observed to decay simultaneously in all such frames. The analysis of this example reveals the underlying physics of the differential aging effect in Langevin's travelling-twin thought experiment.

J. H. Field

2008-09-08T23:59:59.000Z

242

Conditional transfer of quantum correlation in the intensity of twin beams  

E-Print Network [OSTI]

A conditional protocol of transferring quantum-correlation in continuous variable regime was experimentally demonstrated. The quantum-correlation in two pairs of twin beams, each characterized by intensity-difference squeezing of 7.0 dB, was transferred to two initially independent idler beams. The quantum-correlation transfer resulted in intensity-difference squeezing of 4.0 dB between two idler beams. The dependence of preparation probability and transfer fidellity on the selection bandwidth was also studied.

Yun Zhang; Kazuhiro Hayasaka; Katsuyuki Kasai

2005-04-06T23:59:59.000Z

243

Plastification of polymers in twin-screw-extruders: New visualization technic using high-speed imaging  

SciTech Connect (OSTI)

The initial melting of the first granules through plastic energy dissipation (PED) at the beginning of the melting zone, in the co-rotating twin-screw extruder is visualized in this work. The visualization was created through the use of a high speed camera in the cross section of the melting zone. The parameters screw speed, granule-temperature, temperature-profile, type of polymer and back pressure were examined. It was shown that the screw speed and the temperature-profile have significant influence on the rate of initial melting.

Knieper, A., E-mail: Alexander.Knieper@lbf.fraunhofer.de, E-mail: Christian.Beinert@lbf.fraunhofer.de; Beinert, C., E-mail: Alexander.Knieper@lbf.fraunhofer.de, E-mail: Christian.Beinert@lbf.fraunhofer.de [Group Polymer Processing, Division Plastics, Fraunhofer-Institute LBF (Germany)

2014-05-15T23:59:59.000Z

244

Determining the DUF55-domain structure of human thymocyte nuclear protein 1 from crystals partially twinned by tetartohedry  

SciTech Connect (OSTI)

Human thymocyte nuclear protein 1 (hTHYN1) contains a unique DUF55 domain of 167 residues (55-221), but its cellular function is unclear. Crystals of DUF55 belong to the trigonal space group P3{sub 1}, but twinning causes the data to approach an apparent 622 symmetry. Two datasets to 2.3 {angstrom} resolution were collected. Statistical analysis confirmed that both datasets were partially twinned by tetartohedry. Tetartohedral twin fractions were estimated. After the structure was determined, only one twofold axis of rotational pseudosymmetry was found in the crystal structure. Using the DALI program, a YTH domain, which is a potential RNA binding domain from human YTH domain-containing protein 2, was identified to have the most similar three-dimensional fold to DUF55. It is implied that DUF55 might be a potential RNA-related domain.

Yu, Feng; Song, Aixin; Xu, Chunyan; Sun, Lihua; Li, Jian; Tang, Lin; Yu, Minmin; Yeates, Todd O.; Hu, Hongyu; He, Jianhua

2009-06-06T23:59:59.000Z

245

Low-energy planar magnetic defects in BaFe2As2: Nanotwins, twins, antiphase, and domain boundaries  

SciTech Connect (OSTI)

In BaFe2As2, structural and magnetic planar defects begin to proliferate below the structural phase transition, affecting descriptions of magnetism and superconductivity. We study, using density-functional theory, the stability and magnetic properties of competing antiphase and domain boundaries, twins and isolated nanotwins (twin nuclei), and spin excitations proposed and/or observed. These nanoscale defects have a very low surface energy (22210 m Jm?2), with twins favorable to the mesoscale. Defects exhibit smaller moments confined near their boundariesmaking a uniform-moment picture inappropriate for long-range magnetic order in real samples. Nanotwins explain features in measured pair distribution functions so should be considered when analyzing scattering data. All these defects can be weakly mobile and/or can have fluctuations that lower assessed ordered moments from longer spatial and/or time averaging and should be considered directly.

Khan, Suffian N. [Ames Laboratory; Alam, Aftab [Ames Laboratory; Johnson, Duane D. [Ames Laboratory

2013-11-27T23:59:59.000Z

246

PPS27, 2011, 27th World Congress of the Polymer Processing Society, May 1014, Marrakech, Morocco 1 Influence of Twin-Screw Processing Conditions  

E-Print Network [OSTI]

montmorillonite with respective mass fraction of 85/10/5 were prepared with a co-rotating twin-screw extruder Influence of Twin-Screw Processing Conditions on Structure and Properties of Polypropylene - Organoclay such as screw speed, feed rate and barrel temperature on the nanocomposite structure and its consequences

Paris-Sud XI, Université de

247

E-Print Network 3.0 - assist aircraft power Sample Search Results  

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

analyze the performance of earlier generation... feedback testing, closes each aircraft's control loop inside of the aFAST scheduling algorithm. Validation... of trajectory...

248

E-Print Network 3.0 - aircraft by size Sample Search Results  

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

the size of the bank of aircraft does not significantly impact the effectiveness of the scheduling... by allowing airlines to have greater control over their ... Source: NASA -...

249

E-Print Network 3.0 - aircraft by motive power Sample Search...  

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

analyze the performance of earlier generation... feedback testing, closes each aircraft's control loop inside of the aFAST scheduling algorithm. Validation... of trajectory...

250

E-Print Network 3.0 - aircraft maintenance planning Sample Search...  

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

(CAP) research and development program, NASA... by allowing airlines to have greater control over their individual arrival banks of aircraft. NASA... . This paper introduces a...

251

E-Print Network 3.0 - aircraft transportation system Sample Search...  

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

from approximately 5 to 20 aircraft. Condition one consisted solely of this ... Source: NASA - Center-TRACTION Automation System (CTAS) Collection: Energy Storage, Conversion and...

252

E-Print Network 3.0 - aircraft overflight study Sample Search...  

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

23 EXPANDING THE USE OF TIME-BASED METERING: MULTI-CENTER TRAFFIC MANAGEMENT ADVISOR Summary: the Center, or for aircraft simply overflying the Center. Moreover,...

253

E-Print Network 3.0 - aircraft maintenance equipment Sample Search...  

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

stream of aircraft Source: NASA - Center-TRACTION Automation System (CTAS) Collection: Energy Storage, Conversion and Utilization 35 Disruption Management in the Airline Industry...

254

E-Print Network 3.0 - aircraft turbine disk Sample Search Results  

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

2 Intelligent Andrej Horvat, David Hartwanger Summary: principles as an aircraft Wind turbines fall into two main categories, those that depend upon aerodynamic... flow turbines...

255

E-Print Network 3.0 - aircraft carriers proposed Sample Search...  

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

Date: April 8, 2008 POC: Dave Lopez, MA-30 Summary: Designated Cat 1 Carrier 159 Bonneville Power Administration Aircraft Services United States DOE... Member Airline 288...

256

E-Print Network 3.0 - aircraft gates Sample Search Results  

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

9 Airspace Management Decision Tool Validating the Behavior and Structure of Software Design Summary: or to take off). 4. The airport owns two taxiways. An aircraft may...

257

DETERMINING EMPLOYEE EXPOSURE TO ETHYLENE GLYCOL WHILE PERFORMING MAINTENANCE ON AN AIRCRAFT DEICING FLUID COLLECTION SYSTEM.  

E-Print Network [OSTI]

??Air monitoring was performed on an aircraft deicing fluid collection system at the Cincinnati/Northern Kentucky International Airport (CNKIA). The goal of the study was to (more)

CHAPMAN, DONALD RIVERS

2007-01-01T23:59:59.000Z

258

Automated fixture and robot-aided deburring for light aircraft components.  

E-Print Network [OSTI]

??Bristol Aerospace Limited (BAL), Winnipeg, manufactures a wide range of parts for the Boeing-777 aircraft. Most of these parts have cubic edges and cubic surfaces (more)

Pandian, Jayasundaram

1998-01-01T23:59:59.000Z

259

E-Print Network 3.0 - aircraft emissions simulation Sample Search...  

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

Institute of Technology (MIT) Collection: Engineering 49 Inverting for emissions of carbon monoxide from Asia using aircraft observations over the western Pacific Summary:...

260

E-Print Network 3.0 - aircraft carrier program Sample Search...  

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

of aircraft. NASA Source: NASA - Center-TRACTION Automation System (CTAS) Collection: Energy Storage, Conversion and Utilization 4 AIAA 2008-7835 Selection of a Carrier...

Note: This page contains sample records for the topic "twin otter 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

E-Print Network 3.0 - aging aircraft ndi Sample Search Results  

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

) to detect and classify flaws in aging aircraft. Our underlying concept is to use mobile robots, automated... characteristic of all these problems is illustrated explicitly...

262

E-Print Network 3.0 - aircraft system uas Sample Search Results  

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

energy Summary: Ltd. All rights reserved. 1. Introduction The development of new energy systems for aircraft... heat exchanger effectiveness group, Eq. (17) ations that would...

263

E-Print Network 3.0 - aircraft composite inspections Sample Search...  

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

The First Joint DoDFAANASA Conference on Aging Aircraft 1997 July 8-10 Ogden UT Remote and Automated Inspection: Status and Prospects Summary: automated) inspection of...

264

E-Print Network 3.0 - aircraft vortex spacing Sample Search Results  

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

Energy Storage, Conversion and Utilization 17 Proceedings of FEDSM 98 1998 ASME Fluids Engineering Division Summer Meeting Summary: relevance to the problem of aircraft...

265

E-Print Network 3.0 - aircraft wake vortex Sample Search Results  

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

University Collection: Chemistry ; Engineering 29 Proceedings of FEDSM 98 1998 ASME Fluids Engineering Division Summer Meeting Summary: relevance to the problem of aircraft...

266

Simultaneous operation of gain- and index-guided lateral modes in twin-stripe laser diode arrays  

SciTech Connect (OSTI)

Twin-stripe laser diodes have been fabricated which exhibit two distinct sets of lateral modes. One is associated with a single-lobe near-field intensity profile corresponding to an effective index-guide centered between the stripes. The other has a double-lobe near-field distribution, each lobe centered under a stripe, corresponding to one of the twin-stripe gain-guided supermodes. A large spectral separation between these two modes, believed to be due to band filling, was also observed.

Heflinger, D.G.; Fenner, W.R.

1988-10-01T23:59:59.000Z

267

Development of flight instrumentation and analysis of an aircraft's lateral response to a discrete two-dimensional vertical gust  

E-Print Network [OSTI]

of the requirement for the degree of MASTER OF SCI~?E May 1973 Major Subject, : Aerospace Engineering D~PK~3lT OF FLIGHT INSTRUMENTATION AND ANALYSIS OF AN AIRCRAFT~S LAIL RESPONSE TO A DISCR TE TN'OWINENSIONAL V&TICAL GUST A Thesis RUSSsLL LANE MASK... DeHavilland DHC 2 'Beaver' STOL aircraft. This is a single engined, high-wing aircraft of all metal construction, Fig. 1. Table 1 pro- vides some quantitative data relating to this aircraft. With the emphasis of this paper directed to the aircraft...

Mask, Russell Lane

1973-01-01T23:59:59.000Z

268

On the safety of aircraft systems: A case study  

SciTech Connect (OSTI)

An airplane is a highly engineered system incorporating control- and feedback-loops which often, and realistically, are non-linear because the equations describing such feedback contain products of state variables, trigonometric or square-root functions, or other types of non-linear terms. The feedback provided by the pilot (crew) of the airplane also is typically non-linear because it has the same mathematical characteristics. An airplane is designed with systems to prevent and mitigate undesired events. If an undesired triggering event occurs, an accident may process in different ways depending on the effectiveness of such systems. In addition, the progression of some accidents requires that the operating crew take corrective action(s), which may modify the configuration of some systems. The safety assessment of an aircraft system typically is carried out using ARP (Aerospace Recommended Practice) 4761 (SAE, 1995) methods, such as Fault Tree Analysis (FTA) and Failure Mode and Effects Analysis (FMEA). Such methods may be called static because they model an aircraft system on its nominal configuration during a mission time, but they do not incorporate the action(s) taken by the operating crew, nor the dynamic behavior (non-linearities) of the system (airplane) as a function of time. Probabilistic Safety Assessment (PSA), also known as Probabilistic Risk Assessment (PRA), has been applied to highly engineered systems, such as aircraft and nuclear power plants. PSA encompasses a wide variety of methods, including event tree analysis (ETA), FTA, and common-cause analysis, among others. PSA should not be confused with ARP 4761`s proposed PSSA (Preliminary System Safety Assessment); as its name implies, PSSA is a preliminary assessment at the system level consisting of FTA and FMEA.

Martinez-Guridi, G.; Hall, R.E.; Fullwood, R.R.

1997-05-14T23:59:59.000Z

269

Taxiway Aircraft Traffic Scheduling: A Model and Solution Algorithms  

E-Print Network [OSTI]

can be applied to taxi planning problems. B. Taxi Planning Problem There exist differences between the TPP a nd VRP problems. For the TPP problem, the aircraft does not need to deliver goods to each node it visits. The TPP can be classified... set to be 200 meters. 26, 28, 30 The minimum separation distance can also be replaced by a minimum separation time, 29 in which case the speed does not need to be used any more. Another way 28, 31 is to replace the minimum separation constraint...

Tian, Chunyu

2012-10-19T23:59:59.000Z

270

Property Rights, Progress, and the Aircraft Patent Agreement  

E-Print Network [OSTI]

. COOPERATIVE MODIFICATION OF PATENT RIGHTS Assuming that the monopoly explanation is unsatisfactory, the aircraft patent agreement poses three puzzles: 1. Why would a group of manufacturers, some of whom own patents and some of whom may not, agree to share... Naturally, a firm for which inequality (2) does not hold because the royalties it can command are large can be induced to join with a side payment. This probably explains the payments to the Wright and Curtiss patents. However, if members of the agreement...

Bittlingmayer, George

1988-04-01T23:59:59.000Z

271

Aircraft Integration and Flight Testing of 4STAR  

SciTech Connect (OSTI)

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

272

Development of an aerostatic pocket damper for aircraft engines  

E-Print Network [OSTI]

119 133 VITA 136 LIST OF FIGURES Page Fig. 1 Fig, 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 12 Fig. 13 Fig. 14 Fig. 15 Fig. 16 Fig. 17 Fig. 18 Fig. 19 Fig. 20 Fig. 21 Fig. 22 Fig. 23 Fig. 24... 1 Table 2 Table 3 Table 4 Measured Support Stiffnesses Transfer Constants Final Rotor Unbalance Example Stiffness and Damping Coefficients 40 56 68 130 INTRODUCTION In the aircraft turbine engine field there is a constant effort...

Cardon, Bradley Paul

2012-06-07T23:59:59.000Z

273

Experimental study on pV indicator diagrams of twin-screw refrigeration compressor with economizer  

Science Journals Connector (OSTI)

This paper presents the experimental investigation on the effects of the superfeed pressure together with economizer type on the performance of the twin-screw refrigeration compressor by means of the indicator diagram. With a pressure sensor embedded into the groove at the root of the female rotor on the discharge side, the pressure within the working chamber of a semi-hermetic twin-screw compressor with an economizer is recorded and then transformed into the indicator diagram. The results thus obtained are utilized to investigate the thermodynamic process of the compressor. It is shown that the compressor with an economizer has higher pressure during almost the whole compression process than without an economizer, resulting in the increase in the indicated power. Under different superfeed pressures, the pressure within the compression experiences different changes. This results in an optimal superfeed pressure for maximized compressor efficiency, which can be identified from the calculated compressor efficiency based on the indicator diagrams. It is also found that the pressure has a rapid increase at the beginning of superfeed process, and then a slow rise even a slight drop at the end of superfeed process, which is caused by the dynamic effect during superfeed process. Furthermore, if the superfeed pressure keeps the same, the pressure during compression in the compressor with the heat exchanger economizer is slightly higher than with the flash tank economizer, due to the higher temperature of superfeed refrigerant gas in the former case.

Huagen Wu; Xueyuan Peng; Ziwen Xing; Pengcheng Shu

2004-01-01T23:59:59.000Z

274

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

275

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

E-Print Network [OSTI]

ME 4171 ­ Environmentally Conscious Design & Manufacturing (Bras) Assignment ­ Aircraft Fuel Tank Production Pollution Prevention A local company manufactures a wide variety of fabric fuel tanks for use mainly in the aircraft industry. The main reasons for using fabric in the construction of these tanks

276

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

SciTech Connect (OSTI)

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

None

2009-05-01T23:59:59.000Z

277

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...

Fischer, Shiloh Douglas

1996-01-01T23:59:59.000Z

278

Lyapunov-Based Exponential Tracking Control of a Hypersonic Aircraft with Aerothermoelastic Effects  

E-Print Network [OSTI]

Lyapunov-Based Exponential Tracking Control of a Hypersonic Aircraft with Aerothermoelastic Effects, Florida 32611-6250 DOI: 10.2514/1.46785 Hypersonic flight conditions produce temperature variations of bounded nonvanishing disturbances. Simulation results for a hypersonic aircraft are provided

Dixon, Warren

279

Fiber-optic communication links suitable for on-board use in modern aircraft  

E-Print Network [OSTI]

electromagnetic interference, which can affect the operational performance of these RF systems installed in aircraft. In most cases, due to bundled RF cables, electromagnetic interference in aircraft may interfere to increased susceptibility to electromagnetic interference (EMI)[8-9]. Considering other alternatives

Atiquzzaman, Mohammed

280

Design and Optimization of Future Aircraft for Assessing the Fuel Burn Trends of Commercial  

E-Print Network [OSTI]

aircraft R1 Maximum payload at maximum range SFC Engine specific fuel consumption Sref Reference area STADesign and Optimization of Future Aircraft for Assessing the Fuel Burn Trends of Commercial Francisco, CA 94104, U.S.A. Accurately predicting the fuel burn performance and CO2 emissions of future

Alonso, Juan J.

Note: This page contains sample records for the topic "twin otter 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

Adjoint-based method for supersonic aircraft design using equivalent area distributions  

E-Print Network [OSTI]

Adjoint-based method for supersonic aircraft design using equivalent area distributions Francisco for the design of supersonic aircraft that must match a target equivalent area distribution at constant lift of an adjoint solver for the equivalent area distribution, and the shape design process of a trijet supersonic

Alonso, Juan J.

282

Merging and Spacing of Heterogeneous Aircraft in Support of NextGen  

E-Print Network [OSTI]

large-scale tests of systems developed based on Automatic Dependent Surveillance-Broadcast (ADS-B) information. ADS-B, a crucial component of NextGen, relays highly accurate traffic information between and displays a recommended aircraft speed such that a safe distance is maintained with the leading aircraft

Egerstedt, Magnus

283

Reduction of Computational Complexity for Guidance of Unmanned Aircraft Through Strong Wind Fields  

E-Print Network [OSTI]

of three-dimensional wind data derived from radar measurements, it becomes extremely computationallyReduction of Computational Complexity for Guidance of Unmanned Aircraft Through Strong Wind Fields online guidance for unmanned aircraft in strong wind fields, a method for decomposing grid-based wind

Frew, Eric W.

284

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

285

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

E-Print Network [OSTI]

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

Ramirez, Amado

2012-06-07T23:59:59.000Z

286

High Precision Abundances of the Old Solar Twin HIP 102152: Insights on Li Depletion from the Oldest Sun  

E-Print Network [OSTI]

We present the first detailed chemical abundance analysis of the old 8.2 Gyr solar twin, HIP 102152. We derive differential abundances of 21 elements relative to the Sun with precisions as high as 0.004 dex ($\\lesssim$1%), using ultra high-resolution (R = 110,000), high S/N UVES spectra obtained on the 8.2-m Very Large Telescope. Our determined metallicity of HIP 102152 is [Fe/H] = -0.013 $\\pm$ 0.004. The atmospheric parameters of the star were determined to be 54 K cooler than the Sun, 0.09 dex lower in surface gravity, and a microturbulence identical to our derived solar value. Elemental abundance ratios examined vs. dust condensation temperature reveal a solar abundance pattern for this star, in contrast to most solar twins. The abundance pattern of HIP 02152 appears to be the most similar to solar of any known solar twin. Abundances of the younger, 2.9 Gyr solar twin, 18 Sco, were also determined from UVES spectra to serve as a comparison for HIP 102152. The solar chemical pattern of HIP 102152 makes it a...

Monroe, TalaWanda R; Ramrez, Ivn; Yong, David; Bergemann, Maria; Asplund, Martin; Bean, Jacob; Bedell, Megan; Maia, Marcelo Tucci; Lind, Karin; Alves-Brito, Alan; Casagrande, Luca; Castro, Matthieu; Nascimento, Jos-Dias do; Bazot, Michael; Freitas, Fabrcio C

2013-01-01T23:59:59.000Z

287

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

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

288

Atmospheric CO2 Concentrations from Aircraft for 1972-1981, CSIRO  

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

289

E-Print Network 3.0 - aliphatic chains affects Sample Search...  

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

C-O-S, carbonyl C... aliphatic C-C-H groups was nearly constant at each sampling platform, with the Twin Otter samples having... phase oxidation of volatile compounds. The...

290

Absorption of solar radiation by the atmosphere as determined using satellite, aircraft, and surface data during the  

E-Print Network [OSTI]

Absorption of solar radiation by the atmosphere as determined using satellite, aircraft overcast conditions the aircraft measurements yield an absorptance of 0.32 0.03 for the layer between the aircraft (0.5­13 km), while the GOES 8 albedo versus surface transmittance analysis gives an absorptance

Dong, Xiquan

291

The development of uranium foil farication technology utilizing twin roll method for Mo-99 irradiation target  

E-Print Network [OSTI]

MDS Nordion in Canada, occupying about 75% of global supply of Mo-99 isotope, has provided the irradiation target of Mo-99 using the rod-type UAl sub x alloys with HEU(High Enrichment Uranium). ANL (Argonne National Laboratory) through co-operation with BATAN in Indonesia, leading RERTR (Reduced Enrichment for Research and Test Reactors) program substantially for nuclear non-proliferation, has designed and fabricated the annular cylinder of uranium targets, and successfully performed irradiation test, in order to develop the fabrication technology of fission Mo-99 using LEU(Low Enrichment Uranium). As the uranium foils could be fabricated in laboratory scale, not in commercialized scale by hot rolling method due to significant problems in foil quality, productivity and economic efficiency, attention has shifted to the development of new technology. Under these circumstances, the invention of uranium foil fabrication technology utilizing twin-roll casting method in KAERI is found to be able to fabricate LEU or...

Kim, C K; Park, H D

2002-01-01T23:59:59.000Z

292

Employing Twin Crabbing Cavities to Address Variable Transverse Coupling of Beams in the MEIC  

SciTech Connect (OSTI)

The design strategy of the Medium Energy Electron-Ion Collider (MEIC) at Jefferson Lab contemplates both matching of the emittance aspect ratios and a 50 mrad crossing angle along with crab crossing scheme for both electron and ion beams over the energy range (?s=20-70 GeV) to achieve high luminosities at the interaction points (IPs). However, the desired locations for placing the crabbing cavities may include regions where the transverse degrees of freedom of the beams are coupled with variable coupling strength that depends on the collider rings magnetic elements (solenoids and skew quadrupoles). In this work we explore the feasibility of employing twin rf dipoles that produce a variable direction crabbing kick to account for a range of transverse coupling of both beams.

Castilla, Alejandro [ODU; Delayen, Jean R. [ODU, JLAB; Morozov, Vasiliy [JLAB; Satogata, Todd [JLAB

2014-07-01T23:59:59.000Z

293

Experimental analysis of pressure distribution in a twin screw compressor for multiphase duties  

SciTech Connect (OSTI)

This paper presents the results of an experimental investigation of pressure distribution inside working chamber of a twin screw compressor for multiphase duties. A mathematical model for describing the pressure distribution inside working chamber is proposed. By means of a small pressure transducer embedded into the groove at the root of the rotor, the pressure distributions of a multiphase compressor under various running conditions have been recorded successfully to verify the model. It is found that the pressure curve during the discharge process has a higher level under the conditions of the lower gas void fraction, higher discharge pressure, higher rotational speed and higher inlet pressure. The pressure distribution calculated by model in this paper shows good agreement with the data recorded by a small pressure sensor in a prototype multiphase compressor at the high gas void fractions under different operating conditions. (author)

Cao, Feng; Gao, Tieyu; Li, Songshan; Xing, Ziwen; Shu, Pengcheng [School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)

2011-01-15T23:59:59.000Z

294

Application of the method of effective potentials to a model for twinning in elastic materials  

SciTech Connect (OSTI)

We extend the method of effective potentials to systems with next-nearest-neighbor interactions, and apply it to a one-dimensional discrete model for twins in elastic materials. The energy of the system is given by H = +(..gamma../2) (u/sub n//sub +1/-2u/sub n/+u/sub n-1/)/sup 2/ -cosu/sub n/, where the first two terms model the elastic strain-dependent energy which we take to be in the form of a double well in the strains and the third term gives its dependence on the discretized strain gradients. The periodic potential in the last term is introduced to allow for additional interactions with a background such as a parent phase, grain boundaries, or another array of twins. We obtain the phase diagram and show that it consists of various modulated commensurate as well as incommensurate ground-state configurations. We find continuous phonon-driven transitions between the homogeneous and any modulated phase, an incomplete devil's staircase in a narrow region close to the homogeneous phase and first-order soliton-driven transitions between commensurate phases. The first-order transition lines end at triple points where three commensurate phases coexist. In contrast to other nonconvex models we do not find here any superdegenerate points. We give general arguments which exclude the existence of such points in the present model. Preliminary results obtained by driving the system are discussed. These consist of various metastable configurations exhibiting strong hysteretic variation with the driving force.

Marianer, S.; Floria, L.M.

1988-12-01T23:59:59.000Z

295

Conceptual design of an aircraft automated coating removal system  

SciTech Connect (OSTI)

Paint stripping of the U.S. Air Force`s large transport aircrafts is currently a labor-intensive, manual process. Significant reductions in costs, personnel and turnaround time can be accomplished by the judicious use of automation in some process tasks. This paper presents the conceptual design of a coating removal systems for the tail surfaces of the C-5 plane. Emphasis is placed on the technology selection to optimize human-automation synergy with respect to overall costs, throughput, quality, safety, and reliability. Trade- offs between field-proven vs. research-requiring technologies, and between expected gain vs. cost and complexity, have led to a conceptual design which is semi-autonomous (relying on the human for task specification and disturbance handling) yet incorporates sensor- based automation (for sweep path generation and tracking, surface following, stripping quality control and tape/breach handling).

Baker, J.E.; Draper, J.V.; Pin, F.G.; Primm, A.H.; Shekhar, S.

1996-05-01T23:59:59.000Z

296

Health Monitoring for the Electrical Network of More Electric Aircraft  

Science Journals Connector (OSTI)

In this paper a health monitoring problem for the electrical network of more electric aircraft is addressed. To undertake the health monitoring task the multi?model detection technique is applied. Multi?model based approach associates to each health status a corresponding linear time invariant model which is derived by adjusting appropriately the non?faulty system model to a particular fault situation. The original health monitoring problem can be therefore formulated as a model detection problem. Besides the introduction of the theoretical preliminary of multi?model based approach the computer?aided design process right?sized modelling and realtime simulation based validation for residual generator with Dymola and Matlab are also discussed. Health monitoring for an input filter of an DC motor drive serves as an application case to illustrate the proposed scheme. The designed residual generators are validated on the original nonlinear system with time?domain simulation.

Yang Ji; Johann Bals

2010-01-01T23:59:59.000Z

297

A New Design Concept for 2-Stroke Aircraft Diesel Engines  

Science Journals Connector (OSTI)

Abstract High power density, low weight, compact dimensions, high efficiency as well as reliability are the key factors in designing and dimensioning piston engines for General Aviation and Unmanned Aerial Vehicle (UAV) power plants. Despite of new available technologies, conventional solutions are still struggling to fulfill simultaneously all those requirements. The paper explores the application of a new design of 2-Stroke externally scavenged engines to aircraft. The new concept basically consists in the use of a patented rotary valve for controlling the flow through a set of inlet ports, enabling supercharging and the achievement of extremely high power densities compared to conventional solutions. The scavenging is realized by using an external pump, made up of a further cylinder, whose piston is connected to the same crankshaft. The piston pump allows the crankcase to be used as a conventional oil sump, and greatly improves the crankshaft balance. No poppet valves or camshafts need to be installed, since the flow is driven by piston-controlled ports and by two sets of reed valves. The engine can adopt two types of combustion system: Gasoline Direct Injection (GDI) for SI operations, and Direct Injection Common Rail for Diesel cycle. The paper is focused on the last version, since it can run on standard aircraft fuel. The Diesel engine has three cylinders and three piston pumps, for a total displacement of 1.5 liter The engine is turbocharged and inter-cooled, in order to reach a power target, at sea level, of 150 kW@4000rpm. Another fundamental target is the minimum power of 100kW, at the altitude of 20,000 feet.The paper reviews the design of the engine and presents the numerical prediction of the key performance parameters.

Giuseppe Cantore; Enrico Mattarelli; Carlo Alberto Rinaldini

2014-01-01T23:59:59.000Z

298

Crack detection on HC-130H aircraft using low frequency eddy current  

SciTech Connect (OSTI)

An eddy current inspection method was developed at the Federal Aviation Administration`s Airworthiness Assurance NDI Validation Center (AANC) to easily and rapidly detect subsurface fatigue cracks in the wheel well fairing on the US Coast Guard (USCG) HC-130H aircraft caused by fatigue. The inspection procedure locates cracks as small as 10.2 millimeters in length at 2.54 mm below the skin surface at raised fastener sites. The test procedure developed baseline three USCG aircraft. Inspection results on the three aircraft reveals good correlation with results made during subsequent structural disassembly.

Moore, D.G. [Sandia National Labs., Albuquerque, NM (United States); Mihelic, J.E.; Barnes, J.D. [Coast Guard, Elizabeth City, NC (United States). Aircraft Repair and Supply Center

1998-02-01T23:59:59.000Z

299

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

E-Print Network [OSTI]

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

Stroman, Morris Michael

2012-06-07T23:59:59.000Z

300

The Solar Heat Storage Twin-System of the Lbeck Solar House as an Example of a 2nd Generation Interseasonal Storage Concept  

Science Journals Connector (OSTI)

This was achieved by a heat pump assisted solar heating system centered around a twin storage consisting...3...tank, kept at 35 to 50C, takes care of the heat demand of the low-temperature heating system, and a ...

H. Weik; J. Plagge

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

contrast differences in PAA levels between the dizygous twin pairs were statistically significant. This suggests the existence of genetic differences between PAA levels.  

E-Print Network [OSTI]

contrast differences in PAA levels between the dizygous twin pairs were statistically significant. This suggests the existence of genetic differences between PAA levels. The factor analysis isolated 10 factors

Paris-Sud XI, Université de

302

NONLINEAR OPTICAL EFFECTS IN ROTATIONALLY-TWINNED CRYSTALS: AN EVALUATION OF CdTe, ZnTe AND ZnSe  

E-Print Network [OSTI]

405 NONLINEAR OPTICAL EFFECTS IN ROTATIONALLY-TWINNED CRYSTALS: AN EVALUATION OF CdTe, ZnTe AND Zn une loi en N2. On discutera les avantages potentiels en optique non linéaire des cristaux de CdTe, Zn-spaced twin planes the enhancement is proportional to N2. A comparison is made between CdTe, ZnTe, and Zn

Boyer, Edmond

303

Chain-oxygen ordering in twin-free YBa2Cu3O7-single crystals driven by 20-keV electron irradiation  

E-Print Network [OSTI]

Chain-oxygen ordering in twin-free YBa2Cu3O7- single crystals driven by 20-keV electron irradiation 2005 We have examined the effects of 20-keV electron irradiation on the -Cu 1 -O 1 - n chain-oxygen arrange- ments in oxygen-deficient but otherwise twin-free YBa2Cu3O7- single crystals. Comparison

Johansen, Tom Henning

304

ARM Aerosol Working Group Meeting  

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

Overview of the An Overview of the C Overview of the An Overview of the C C loud and loud and La La nd nd S S urface urface I I nteractions nteractions C C ampaign ampaign (CLASIC) (CLASIC) ARM Science Team Meeting March 13 th , 2008 Norfolk, VA Jason Tomlinson Pacific Northwest National Laboratory Introduction Archive Website WIKI Overview * The primary goal of CLASIC is to improve understanding of the physics of the early stages of cumulus cloud convection as it relates to land surface conditions, and to translate this new understanding into improved representations in GCMs and regional climate models 1 Overview * ARM Southern Great Plains Climate Research Facility - June 8-July 2, 2007 * Nine participating aircraft - In-situ * CIRPAS Twin Otter * Cessna 206 * Duke University Helicopter Observation Platform

305

1  

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

95 GHz Airborne Cloud Radar: Hardware 95 GHz Airborne Cloud Radar: Hardware Modifications for Medium Altitude Flight on the DOE Twin Otter Aircraft and Results from the 2000 Cloud IOP/ARESE II L. Li, S. M. Sekelsky, and M. Bergada University of Massachusetts Microwave Remote Sensing Laboratory Amherst, Massachusetts Introduction The Airborne Cloud Radar (ACR) is a W-band (95 GHz) polarimetric Doppler radar jointly developed by the University of Massachusetts (UMass) and National Aeronautics and Space Administration (NASA) Jet Propulsion Laboratory (JPL). It was designed as a prototype airborne facility for the development of the 94 GHz Cloud Profiling Radar System (CPRS), which is the central instrument for NASA CloudSat mission. Since its completion, ACR has participated in a number of important research

306

Simultaneous Spectral Albedo Measurements Near the ARM SGP Central Facility  

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

Simultaneous Spectral Albedo Measurements Simultaneous Spectral Albedo Measurements Near the ARM SGP Central Facility J. J. Michalsky and Q.-L. Min Atmospheric Sciences Research Center State University of New York Albany, New York J. C. Barnard and R. T. Marchand Pacific Northwest National Laboratory P. Pilewskie National Aeronautics and Space Administration Ames Research Center Moffett Field, California Introduction During ARM Enhanced Shortwave Experiment II (ARESE II) the Twin Otter aircraft made low-altitude (100-300-m) passes over the Central Facility (CF) at the Southern Great Plains (SGP) Clouds and Radiation Testbed (CART) site as part of the flight pattern design for the experiment. The National Aeronautics and Space Administration (NASA) Ames Research Center's Solar Spectral Flux

307

ARM - Evaluation Product - Airborne Visible/Infrared Imaging Spectrometer  

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

ProductsAirborne Visible/Infrared Imaging ProductsAirborne Visible/Infrared Imaging Spectrometer (AVIRIS) Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) 1997.08.01 - 1997.08.01 Site(s) SGP General Description AVIRIS is an optical sensor that delivers calibrated images of the upwelling spectral radiance in 224 contiguous spectral channels (bands) with wavelengths from 400 to 2500 nanometers. AVIRIS has been flown on two aircraft platforms: a NASA ER-2 jet and the Twin Otter turboprop. The main objective of the AVIRIS project is to identify, measure, and monitor constituents of the Earth's surface and atmosphere based on molecular absorption and particle scattering signatures. Research with

308

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

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

309

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

310

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

311

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 constructed. The XLROTOR response plots with changing...

Na, Uhn Joo

2012-06-07T23:59:59.000Z

312

Pilot study: PAH fingerprints of aircraft exhaust in comparison with diesel engine exhaust  

Science Journals Connector (OSTI)

...In the course of a preliminary investigation the PAH fingerprints from diesel engines were compared with those from aircraft ... do not vary significantly. However, in turbine exhaust gas p-quaterphenyl was fo...

J. Krahl; H. Seidel; H.-E. Jeberien

1998-03-01T23:59:59.000Z

313

Strategy for reducing the length and variability of aircraft lead time  

E-Print Network [OSTI]

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

Bielat, Brendon (Brendon Michael)

2010-01-01T23:59:59.000Z

314

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

E-Print Network [OSTI]

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

Karasic, Geoffrey Ian

2011-01-01T23:59:59.000Z

315

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

316

E-Print Network 3.0 - aircraft composite materials Sample Search...  

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

Flares Summary: are burn-in-place type flares containing a combination of AgI and CaCl2 material. The Cessna 340 aircraft... with time. 7 12;Figure 5: Composite Reflectivity...

317

E-Print Network 3.0 - aircraft by ownership Sample Search Results  

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

TOOL FOR EN ROUTE CONTROLLERS1 Heinz Erzberger2 Summary: ownership of them, the maximum number on the List for any sector will seldom exceed 2-3 aircraft in a 20... the...

318

E-Print Network 3.0 - aircraft refueling Sample Search Results  

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

61 Proceedings of the 2005 Winter Simulation Conference M. E. Kuhl, N. M. Steiger, F. B. Armstrong, and J. A. Joines, eds. Summary: aircraft has its own range before needing to...

319

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

E-Print Network [OSTI]

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

Schroeder, Christopher R.

2009-12-18T23:59:59.000Z

320

THEORETICAL MODELING AND COMPUTATIONAL SIMULATION OF ROBUST CONTROL FOR MARS AIRCRAFT  

E-Print Network [OSTI]

The focus of this dissertation is the development of control system design algorithms for autonomous operation of an aircraft in the Martian atmosphere. This research will show theoretical modeling and computational simulation of robust control...

Oh, Seyool

2014-05-31T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

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

322

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

323

E-Print Network 3.0 - aircraft shield test reactor Sample Search...  

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

shield test reactor Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft shield test reactor Page: << < 1 2 3 4 5 > >> 1 A' Brief. History of...

324

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

325

Determining appropriate levels of robotic automation in commercial aircraft nacelle assembly  

E-Print Network [OSTI]

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

Durham, Bryce J. (Bryce James)

2014-01-01T23:59:59.000Z

326

Thermoelectric Energy Harvesting Using Phase Change Materials (PCMs) in High Temperature Environments in Aircraft  

Science Journals Connector (OSTI)

Wireless, energy-autonomous structural health-monitoring systems in aircraft have the potential of reducing total maintenance costs. Thermoelectric energy harvesting, which seems the best choice for creating t...

A. Elefsiniotis; Th. Becker; U. Schmid

2014-06-01T23:59:59.000Z

327

E-Print Network 3.0 - aircraft composite doublers Sample Search...  

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

will be the ER-2, a civilian version of the Air Force's U2-s recon- naissance aircraft Source: Goddard Space Flight Center, NASA - Climate and Radiation Branch Collection:...

328

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

E-Print Network [OSTI]

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

Subramanian, V

2012-06-07T23:59:59.000Z

329

Effects of approach angle on the handling characteristics of light aircraft  

E-Print Network [OSTI]

with larger engines, Smproved airframe construction, and advanced geometry with high-1Sft wings compatible with short takc-off and landing (STOL) op- erations. The latter aspect of light aircraft utili ation has brouPht attention to the difficulties... characteristics are included in table 2 on page 26. This airplane is a typical low wing, medium performanci, single engine airplane and is characteristic of a general aviation aircraft (Beechcraft Bonanza) except for cabin configuration. Instrumenta- tion...

Burke, James Allen

1971-01-01T23:59:59.000Z

330

Control authority of unconventional control surface deflections on a fighter aircraft  

E-Print Network [OSTI]

OF SCIENCE May 1985 Major Subject: Aerospace Engineering CONTROL AUTHORITY OF UNCONVENTIONAL CONTROL SURFACE DEFLECTIONS ON A FIGHTER AIRCRAFT A Thesis by LLOYD JOE STOUT Approved as to style and content by: Donald T. Ward (Chairman of Committee...CONTROL AUTHORITY OF UNCONVENTIONAL CONTROL SURFACE DEFLECTIONS ON A FIGHTER AIRCRAFT A Thesis LLOYD JOE STOUT Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER...

Stout, Lloyd Joe

1985-01-01T23:59:59.000Z

331

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

E-Print Network [OSTI]

for the degree of MASTER OF SCIENCE December 1988 Major Subject: Industrial Engineering A NETWORK APPROACH FOR IDENTIFYING MINIMUM-COST AIRCRAFT ROUTING AJVD FUEL-ALLOCATING DECISIONS A Thesis by NADER MAHMOUD KABBAVI Approved as to style and content by...A NETWORK APPROACH FOR IDENTIFYING MINIMUM-COST AIRCRAFT ROUTING AND FUEL-ALLOCATING DECISIONS A Thesis by NADER MAHMOUD KABBANI Submitted to the OIIice of Graduate Studies of Texas AkM University in partial fulfillment of the requirement...

Kabbani, Nader Mahmoud

1988-01-01T23:59:59.000Z

332

Aircraft Emissions Deposited in the Stratosphere and Within the Arctic Polar Vortex. Final report  

SciTech Connect (OSTI)

This report describes an analysis of the quantity of emissions (water vapor, NO(x)) projected to be deposited directly within the Arctic polar vortex by projected fleets of Mach 2.4 high speed civil transports (HSCT`s). It also evaluates the amount of emissions from subsonic aircraft which are emitted into the lower stratosphere using aircraft emission inventories developed earlier for May 1990 as representative of the annual average.

Baughcum, S.L.

1996-04-01T23:59:59.000Z

333

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

SciTech Connect (OSTI)

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

334

Fuel dispersal modeling for aircraft-runway impact scenarios  

SciTech Connect (OSTI)

A fuel dispersal model for C-141 transport accidents was developed for the Defense Nuclear Agency`s Fuel Fire Technology Base Program to support Weapon System Safety Assessments. The spectrum of accidents resulting from aircraft impact on a runway was divided into three fuel dispersal regimes: low, intermediate, and high-velocity impact. Sufficient data existed in the accident, crash test, and fuel-filled bomb literature to support development of a qualitative framework for dispersal models, but not quantitative models for all regimes. Therefore, a test series at intermediate scale was conducted to generate data on which to base the model for the high-velocity regime. Tests were conducted over an impact velocity range from 12 m/s to 91 m/s and angles of impact from 22.5{degrees} to 67.5{degrees}. Dependent variables were area covered by dispersed fuel, amount of mass in that area, and location of the area relative to the impact line. Test results showed that no liquid pooling occurred for impact velocities greater than 61 m/s, independent of the angle of impact. Some pooling did occur at lower velocities, but in no test was the liquid-layer thickness greater than 5.25 mm.

Tieszen, S.R.

1995-11-01T23:59:59.000Z

335

Prefilming twin-fluid nozzle assisted precipitation method for preparing nanocrystalline HNS and its characterization  

Science Journals Connector (OSTI)

The ultra-fine HNS (2,2?,4,4?,6,6?-hexanitrostilbene) with desired properties is needed for military and civilian applications because of its reliable threshold energy to short impulse shock waves and its excellent thermal and shock stability. This paper reports on prefilming twin-fluid nozzle assisted precipitation (PTFN-P) to obtain ultra-fine HNS explosive with high specific surface area (SSA), high purity, and narrow particle size distribution. The properties of ultra-fine HNS have been confirmed by SEM, BET, HPLC, XRD, DSC and TGA-SDTA. SEM photograph revealed that the PTFN-P process offers ellipsoid crystalline morphology with particle size of 90150nm. The BET and Langmuir SSA of nanocrystalline HNS with purity of 99.44wt.% were determined to be 19.28m2/g and 29.26m2/g, respectively. The XRD peaks of nanocrystalline HNS seemed to have similar diffraction angles as those of synthesized HNS, and the weakening of peak strength was observed apparently. DSC results of the nanocrystalline HNS showed that the exothermic decomposing at the temperature range of 323398C. Furthermore, HNS samples were submitted to impact and small scale gap test and the results indicated that nanocrystalline HNS is less sensitive than synthesized HNS (50?m) to impact and shock stimuli.

JingYu Wang; Hao Huang; Wen Zheng Xu; Yu Ruo Zhang; Bin Lu; Rui Zheng Xie; Peiyong Wang; Ni Yun

2009-01-01T23:59:59.000Z

336

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

SciTech Connect (OSTI)

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

337

Thermal Cyclic Creep and Long-Term Strength of the Material of Aircraft Gas Turbine Blades after Operation  

Science Journals Connector (OSTI)

The remaining thermal cyclic creep and long-term strength life of the material of aircraft gas turbine blades after operation has been determined experimentally....

B. S. Karpinos; V. V. Samuleev; B. A. Lyashenko; E. V. Laiske

2013-09-01T23:59:59.000Z

338

I - Matter, antimatter and geometry II - The twin universe model : a solution to the problem of negative energy particles III - The twin universe model plus electric charges and matter-antimatter symmetry  

E-Print Network [OSTI]

We introduce a new dynamical group whose coadjoint action on its momentum space takes account of matter-antimatter symmetry on pure geometrical grounds. According to this description the energy and the spin are unchanged under matter-antimatter symmetry. We recall that the antichron components of the Poincar\\'{e} group, ruling relativistic motions of a mass-point particle, generate negative energy particles. The model with two twin universes, inspired by Sakharov's one, solves the stability issue. Positive and negative energy particles motions hold in two distinct folds. The model is extended to charged particles. As a result, the matter-antimatter duality holds in both universes.

Frederic Henry-Couannier; Gilles D'Agostini; Jean-Pierre Petit

2005-02-20T23:59:59.000Z

339

ROUTEMAP model for predicting aircraft noise exposure along military training routes  

Science Journals Connector (OSTI)

A model and PC?based computer program has been prepared to calculate noise levels along low?altitude high?speed military training routes. The program is designed for use by environmental planning personnel who are familiar with MTR operations and with noise but are not necessarily expert. The program provides options for selecting general types of operations (visual or instrument navigation) aircraft types and speeds altitudes and nominal track centerlines. Up to 20 track/altitude/aircraft types may be defined within a 20?mi?wide corridor. Aircraft on each track have a Gaussian lateral distribution about the centerline. The program contains nominal standard deviations based on the type of operations or the user may specify a site?specific value. Aircraft noise emission levels are derived from the USAF NOISEFILE database. The program calculates L eq L dn and L dnmr where L dnmr is L dn with an adjustment to account for the onset rate of MTR aircraft noise. Program output is available in tabular form or in graphs suitable for inclusion in reports. [This work was sponsored by USAF AAMRL/BBE.

Michael J. Lucas; Kenneth J. Plotkin

1989-01-01T23:59:59.000Z

340

Comparison of methodologies estimating emissions of aircraft pollutants, environmental impact assessment around airports  

SciTech Connect (OSTI)

Air transportation growth has increased continuously over the years. The rise in air transport activity has been accompanied by an increase in the amount of energy used to provide air transportation services. It is also assumed to increase environmental impacts, in particular pollutant emissions. Traditionally, the environmental impacts of atmospheric emissions from aircraft have been addressed in two separate ways; aircraft pollutant emissions occurring during the landing and take-off (LTO) phase (local pollutant emissions) which is the focus of this study, and the non-LTO phase (global/regional pollutant emissions). Aircraft pollutant emissions are an important source of pollution and directly or indirectly harmfully affect human health, ecosystems and cultural heritage. There are many methods to asses pollutant emissions used by various countries. However, using different and separate methodology will cause a variation in results, some lack of information and the use of certain methods will require justification and reliability that must be demonstrated and proven. In relation to this issue, this paper presents identification, comparison and reviews of some of the methodologies of aircraft pollutant assessment from the past, present and future expectations of some studies and projects focusing on emissions factors, fuel consumption, and uncertainty. This paper also provides reliable information on the impacts of aircraft pollutant emissions in short term and long term predictions.

Kurniawan, Jermanto S., E-mail: Jermanto.kurniawan@inrets.fr; Khardi, S., E-mail: Salah.khardi@inrets.f

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Spectrally resolved near-field intensity measurements from gain-guided twin-stripe laser diode arrays. Technical report  

SciTech Connect (OSTI)

Gain-guided twin-stripe laser diodes were observed that exhibit two distinct sets of longitudinal modes, one corresponding to a single near-field intensity profile centered between the stripes and the other to a double-lobe near-field distribution centered under the stripes. A large spectral separation between these two sets of modes was also measured. The double-lobe distribution probably results from a weak index guide, which occurs because of the decrease in the current density between stripes. The spectral separation between these two near-field modes is believed to be due to band filling.

Heflinger, D.G.; Fenner, W.R.

1988-11-01T23:59:59.000Z

342

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

343

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

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

344

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

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

345

Modeling and analysis of aircraft non-linear components for harmonics analysis  

SciTech Connect (OSTI)

Modern commercial aircraft Electric Power Systems (EPS) include many nonlinear components which produce harmonics. The addition of all the current harmonics could result in a power system with unacceptable levels of voltage distortion. It is important to be able to predict the levels of voltage distortion at early program stages to correct any potential problems and avoid costly redesigns. In this paper the nature and sources of harmonic producing equipment are described. These sources of harmonics and their effect on aircraft power system operation are described. Models for various aircraft non-linear components are developed in this paper. These component models are used in a model of the Boeing 777 EPS which is used to calculate voltage harmonics for various airplane configurations and flight conditions. A description of this model and the models used for various components are given. Tests performed to validate these models are described. Comparison of experimental results with analytical model predictions are given.

Karimi, K.J. [Boeing Computer Services, Seattle, WA (United States); Voss, J. [Boeing Commercial Airplane Group, Seattle, WA (United States)

1995-12-31T23:59:59.000Z

346

Twin Oaks Landscape, Inc. is seeking additional highly-qualified green industry professionals to manage and operate our growing business; such candidates shall possess attributes of accountability, integrity, passion,  

E-Print Network [OSTI]

clients in the areas of landscape maintenance, drainage solutions and design and build projects. We winTwin Oaks Landscape, Inc. is seeking additional highly-qualified green industry professionals Experienced Snow Plow Skid and/or Truck Drivers Snow Shovelers Executive Summary Twin Oaks Landscape, Inc

Isaacs, Rufus

347

Titanium is hot, but can it stand the heat. [For jet turbines and hypersonic aircraft  

SciTech Connect (OSTI)

Titanium aluminides, a new class of intermetallics with ceramic-like properties, that could change the shape of future jet turbines and hypersonic aircraft, are described. These intermetallics are alloyed from two lightweight metals, as opposed to superalloys, the current compressor leaders, which are primarily nickel, cobalt, or iron. Thus, aluminides show immediate promise of much lower mass than superalloys. Metallurgists can alloy and thermochemically process Ti3Al, the most fully developed of the aluminides, to achieve 3-5 percent room-temperature ductility. Consideration is given to other titanium alloys that show promise for application in an engine or on the skin of a hypersonic aircraft.

Brown, A.S.

1991-06-01T23:59:59.000Z

348

Parallel calculation of sensitivity derivatives for aircraft design using automatic differentiation  

SciTech Connect (OSTI)

Realistic multidisciplinary design optimization (MDO) of advanced aircraft using state-of-the-art computers is an extremely challenging problem from both the physical modelling and computer science points of view. In order to produce an efficient aircraft design, many trade-offs must be made among the various physical design variables. Similarly, in order to produce an efficient design scheme, many trade-offs must be made among the various MDO implementation options. In this paper, we examine the effects of vectorization and coarse-grained parallelization on the SD calculation using a representative example taken from a transonic transport design problem.

Bischof, C.H.; Knauff, T.L. Jr. [Argonne National Lab., IL (United States); Green, L.L.; Haigler, K.J. [National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center

1994-01-01T23:59:59.000Z

349

Application of an all-solid-state, frequency-doubled Nd:YAP laser to the generation of twin beams at 1080 nm  

E-Print Network [OSTI]

A laser-diode-pumped intracavity frequency-doubled Nd:YAP/KTP laser is presented. Over 110 mw of TEM00 single-frequency output power at 540-nm wavelength was obtained. The output green laser was employed to pump a semimonolithic nondegenerate optical parametric oscillator to produce intensity quantum correlated twin beams at 1080 nm, and the maximum quantum noise squeezing of 74 %(5.9 dB) on the intensity difference fluctuation between the twin beams is observed. The threshold was reduced and the stability was increased significantly when compared with similar lamp-pumped systems.

Ruixiang Guo; Julien Laurat; Jiangrui Gao; Changde Xie; Kunchi Peng

2005-12-04T23:59:59.000Z

350

Synthesis, physicochemical characterization and crystallographic twinning of Li{sub 2}ZnSnS{sub 4}  

SciTech Connect (OSTI)

Li{sub 2}ZnSnS{sub 4} is a new diamond-like semiconductor, which is of interest as a host structure for the creation of potentially interesting electronic, magnetic and photovoltaic materials. The compound was synthesized via traditional high-temperature solid-state methods and was predicted to adopt a wurtz-stannite structure with all atoms possessing tetrahedral environments. Initial analysis of single-crystal X-ray diffraction data indicated crystallographic disorder that upon closer examination violated basic chemical principles. The structure was subsequently re-evaluated and the apparent 'disorder' problem was found to be the result of pseudo-merohedral twinning. The crystal structure was finally solved in the monoclinic space group Pn, which resulted in a chemically reasonable model. The refinement converged with R1=1.68% (for all data). Additional characterization of the sample, including diffuse reflectance, thermal analysis and second harmonic generation measurements, was also performed. - Abstract: Li{sub 2}ZnSnS{sub 4} is a new diamond-like semiconductor synthesized via high-temperature solid-state methods. Analysis of single-crystal X-ray diffraction data indicated that the structure was a pseudo-merohedral twin crystallizing in space group Pn and related to the wurtz-stannite structure. Additional characterization of the sample is reported. Display Omitted.

Lekse, Jonathan W. [Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Mellon Hall 302, Pittsburgh, PA 15282 (United States); Leverett, Beth M.; Lake, Charles H. [Department of Chemistry, Indiana University of Pennsylvania, 975 Oakland Avenue, Indiana, PA 15705 (United States); Aitken, Jennifer A. [Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, Mellon Hall 302, Pittsburgh, PA 15282 (United States)], E-mail: aitkenj@duq.edu

2008-12-15T23:59:59.000Z

351

Abstract--In this paper, we investigate the potential of a self-powered gliding aircraft to remain aloft indefinitely. We focus  

E-Print Network [OSTI]

, 18015, USA. motive power for the aircraft is provided via solar energy generated in-flight. However flight, as well as trajectory strategies for solar power generation. Both the aircraft design and power generation problems are cast as non-linear optimization problems where the aircraft equations of motion

Spletzer, John R.

352

A Low-Cost System for Measuring Horizontal Winds from Single-Engine Aircraft  

Science Journals Connector (OSTI)

The implementation and accuracy of a low-rate (~1 Hz) horizontal wind measurement system is described for a fixed-wing aircraft without modification to the airframe. The system is based on a global positioning system (GPS) compass that provides ...

Stephen A. Conley; Ian C. Faloona; Donald H. Lenschow; Anna Karion; Colm Sweeney

2014-06-01T23:59:59.000Z

353

Robust control of transition maneuvers for a class of V/STOL aircraft  

Science Journals Connector (OSTI)

This work focuses on the control law design for a class of aerial systems able to perform transition maneuvers from hover to level flight configurations. An analysis of the aircraft dynamics and of the flight envelope of the vehicle, encompassing both ... Keywords: Path following, Robust control, Transition maneuver, Unmanned Aerial Vehicles

Roberto Naldi; Lorenzo Marconi

2013-06-01T23:59:59.000Z

354

Proceedings of the 2007 Aging Aircraft Conference Integration of Technology Roadmapping Information and Business Case  

E-Print Network [OSTI]

Proceedings of the 2007 Aging Aircraft Conference Integration of Technology Roadmapping Information with technology insertion roadmaps. This report describes the development of an information model that details technology roadmapping information for use within obsolescence-driven design refresh planning, and also

Sandborn, Peter

355

Interface design for an aircraft thrust and braking indicator/advisor  

Science Journals Connector (OSTI)

Recent advances in the development of aircraft landing and takeoff performance monitoring systems (Pinder, 2003) have shown the feasibility of a cockpit instrument that could aid significantly in the decision making process during the most critical phases ... Keywords: auditory interfaces, aviation, bimodal user interfaces, cockpit user interfaces

S. D. Pinder; D. N. Bristow; T. C. Davies

2006-11-01T23:59:59.000Z

356

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

Science Journals Connector (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

357

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

E-Print Network [OSTI]

A UAV motor denoising technique to improve localization of surrounding noisy aircrafts: proof of the Acoustics 2012 Nantes Conference 23-27 April 2012, Nantes, France 2937 #12;Unmanned Aerial Vehicles (UAVs of monitoring and surveillance applications. A major problem when operating with swarm of UAVs is the risk

Paris-Sud XI, Université de

358

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

359

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

E-Print Network [OSTI]

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

Stanford University

360

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

E-Print Network [OSTI]

Aircraft Microphysical Documentation from Cloud Base to Anvils of Hailstorm Feeder Clouds Documentation during January and February 2000 of the structure of severe convective storms in Men- dozaI) rockets, guided by tracking radar, to seed the high-reflectivity cores of in- cipient hailstorms (Makitov

Daniel, Rosenfeld

Note: This page contains sample records for the topic "twin otter 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

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

E-Print Network [OSTI]

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

Kreinovich, Vladik

362

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

E-Print Network [OSTI]

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

Turova, Varvara

363

Knowledge-based support in Non-Destructive Testing for health monitoring of aircraft structures  

Science Journals Connector (OSTI)

Maintenance manuals include general methods and procedures for industrial maintenance and they contain information about principles of maintenance methods. Particularly, Non-Destructive Testing (NDT) methods are important for the detection of aeronautical ... Keywords: Aircraft industry, Conceptual graphs, Experienced knowledge, Formal visual reasoning, Maintenance procedure, Non-Destructive Testing

Bernard Kamsu-Foguem

2012-10-01T23:59:59.000Z

364

Proceedings of ICONS 2002. International Conference on Sonar Sensors and Systems. SOUND FROM A LIGHT AIRCRAFT  

E-Print Network [OSTI]

in all three media. A technique has been developed for measuring the low-frequency sound speed A LIGHT AIRCRAFT FOR UNDERWATER ACOUSTICS APPLICATIONS Michael J. Buckingham, Eric M. Giddens, Fernando the coast, north of La Jolla, southern California, USA, in which a single-engine, propeller-driven light

Buckingham, Michael

365

ARM - Field Campaign - NASA Coordinated Airborne CO2 Lidar Flight Test  

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

govCampaignsNASA Coordinated Airborne CO2 Lidar Flight Test Campaign govCampaignsNASA Coordinated Airborne CO2 Lidar Flight Test Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : NASA Coordinated Airborne CO2 Lidar Flight Test Campaign 2009.07.27 - 2009.08.07 Lead Scientist : Edward Browell For data sets, see below. Description This airborne field test campaign was designed to obtain a coordinated set of remote CO2 Laser Absorption Spectrometer (LAS) measurements using the NASA Langley/ITT 1.57-micron Continuous-Wave (CW) LAS operating from the NASA Langley UC-12 aircraft; the NASA Goddard 1.57-micron pulsed LAS operating from the NASA Glenn Lear-25 aircraft; and the NASA Jet Propulsion Laboratory 2.0-micron CW-coherent LAS operating from a contracted Twin Otter aircraft. These remote LAS CO2 column measurements were compared with

366

Hazard Analysis of Mortality Among Twins and Triplets in the United States: From 20 Weeks Gestation Through the First Year of Life  

E-Print Network [OSTI]

efforts or grasps? (Siegel and Swanson, 2004: 371-371). These recommendations were put into place to ensure that the vital registration data derived from birth and death certificates are valid and reliable. This will ensure the highest possible........................................................................ 10 Trends of Twin and Triplet Births in the United States ................. 10 Defining and Measuring Fetal and Infant Mortality ...................... 12 The Importance of Infant Mortality...

DeSalvo, Bethany S.

2011-08-08T23:59:59.000Z

367

Identification of Residues in DmsD for Twin-Arginine Leader Peptide Binding, Defined through Random and Bioinformatics-Directed Mutagenesis  

Science Journals Connector (OSTI)

The DmsAB dimer is targeted toward the cytoplasmic membrane via the twin-arginine translocation (Tat) system, where it attaches to the membrane-anchor subunit, DmsC (6). ... Each variant was assessed on 5?10 blots, and the mean binding curve and standard deviation was determined. ...

Catherine S. Chan; Tara M. L. Winstone; Limei Chang; Charles M. Stevens; Matthew L. Workentine; Haiming Li; Ying Wei; Mary J. Ondrechen; Mark Paetzel; Raymond J. Turner

2008-02-05T23:59:59.000Z

368

1Electricity from Sunlight: The Van Allen Probes Solar Panels NASA's twin Van Allen Probes spacecraft will be launched in 2012. The  

E-Print Network [OSTI]

1Electricity from Sunlight: The Van Allen Probes Solar Panels NASA's twin Van Allen Probes of the surrounding four solar panel `wings' that provide power to the spacecraft instruments. The small blue rectangles within each of the four solar panels show the location of the solar cells used to power

369

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

SciTech Connect (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

370

Melt-Mixing by Novel Pitched-Tip Kneading Disks in a co-rotating Twin-Screw Extruder  

E-Print Network [OSTI]

Melt-mixing in twin-screw extruders is a key process for development of polymer composites, and quantification of mixing performance of kneading elements based on the physical process in them is a challenging problem. We discuss melt-mixing by novel kneading elements, called "pitched-tip kneading disk (ptKD)". Disk-stagger angle and tip angle are the main geometrical parameters of the ptKDs. We investigated four typical arrangements of the ptKDs, which are forwarding and backwarding disk-staggers combined with forwarding and backwarding tips, respectively. Numerical simulations under a certain feed rate and screw revolution speed were performed and mixing process was investigated by using Lagrangian statistics. It is found that the four types had different mixing characteristics, and their mixing processes were explained by a coupling effect of drag flow by disk staggering and pitched-tip and pressure flow, which is controlled by operational conditions.

Nakayama, Yasuya; Shigeishi, Takashi; Tomiyama, Hideki; Kajiwara, Toshihisa

2010-01-01T23:59:59.000Z

371

An Observing System Simulation Experiment for the Unmanned Aircraft System Data Impact on Tropical Cyclone Track Forecasts  

Science Journals Connector (OSTI)

High-altitude, long-endurance unmanned aircraft systems (HALE UAS) are capable of extended flights for atmospheric sampling. A case study was conducted to evaluate the potential impact of dropwindsonde observations from HALE UAS on tropical ...

N. C. Priv; Yuanfu Xie; Steven Koch; Robert Atlas; Sharanya J. Majumdar; Ross N. Hoffman

2014-11-01T23:59:59.000Z

372

The Management of Political Risk in the Overseas Mergers and Acquisitions of General Aviation Aircraft Company Limited of China  

Science Journals Connector (OSTI)

In this paper, at the background of the General Aviation Aircraft Co., Ltd. of China (GAAC) mergers successfully the Cirrus Corporation of American (CCA), by analyzing political risks which existing in the overse...

Xi-yu Han; Wei-li Xia

2013-01-01T23:59:59.000Z

373

A flight test system for the determination of the stability and control derivatives of a general aviation aircraft  

E-Print Network [OSTI]

and flight modes. Maneuvers were performed that would yield the most useful data for determining stability and control derivatives. Flight tests were performed for various airspeeds, altitudes, and aircraft configurations. Takeoff, landing, cruise and engine...

Oehl, David Christopher

1995-01-01T23:59:59.000Z

374

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.

375

Nitric oxide emissions from the high-temperature viscous boundary layers of hypersonic aircraft within the stratosphere  

SciTech Connect (OSTI)

The authors study the nitric oxide emission characteristics of supersonic aircraft resulting from heating of viscous boundary layers along the skin of the aircraft. Previous study has concentrated on nitric oxide emissions coming from combustion products from the scramjet engines. This work shows that above mach 8, emissions from viscous heating become a significant factor in total emission of nitric oxide. Above mach 16 it becomes the dominant source of emission.

Brooks, S.B.; Lewis, M.J.; Dickerson, R.R. [Univ. of Maryland, College Park, MD (United States)

1993-09-20T23:59:59.000Z

376

An experimental investigation of a simple model simulation of a complex non-uniform beam (aircraft) vibration  

E-Print Network [OSTI]

AN EXPERIMENTAL INVESTIGATION OF A SIMPLE MODEL SIMULATION OF A COMPLEX NON-UNIFORM BEAM (AIRCRAFT) VIBRATION A Thesis By WILLIAM DAVID HARDIN Submitted to the Graduate College of the Texas A%M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1966 Major Subject: Mechanical Engineering AN EXPERIMENTAL INVESTIGATION OF A SIMPLE MODEL SIMULATION OF A COMPLEX NON-UNIFORM BEAM (AIRCRAFT) VIBRATION A Thesis By WILLIAM DAVID HARDIN Approved...

Hardin, William David

2012-06-07T23:59:59.000Z

377

On the problem of large perturbation flow created by near-hovering flight of aircraft  

E-Print Network [OSTI]

ON THE PROBLEM OF LARGE PERTURBATION FLOW CREATED BY NEAR-HOVERING FLIGHT OF AIRCRAFT A Thesis WILLIAM HENRY RUDDEROW Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in Partial Fulfillment... of the Requirements for the Degree of MASTER OF SCIENCE January, 1960 Department of Aeronautical Engineering Major Subject: Aeronautical Engineering ACKNOWLEDGEMERTS I wish to take this opportunity to express my appreciation to Professor Albert Gail for his...

Rudderow, William Henry

1960-01-01T23:59:59.000Z

378

Aircraft Measurements and Numerical Simulations of Gravity Waves in the Extratropical  

E-Print Network [OSTI]

of RF-02 in START08 1.67km WRF simulations at 1800 UTC 04/22/2008 (1600 MDT 04/21/2008) Grey Shaded Area: 9km Wind Speed (m/s) Blue/Red Contour: 12.5km Divergence (pos/neg) Divergence at Flight Height Black Contour: 9km Pressure Vector: 9km Wind Field (m/s) O A B C #12;Spectral Analysis of Aircraft Measurements

Thompson, Anne

379

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

SciTech Connect (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. 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

380

Ozone levels in passenger cabins of commercial aircraft on North American  

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

Note: This page contains sample records for the topic "twin otter 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

Effects of simulated jet aircraft noise on heart rate and behavior of desert ungulates  

SciTech Connect (OSTI)

Many landscapes underlying military designated air spaces have been established as national parks, wildlife refuges, or wilderness areas. The juxtaposition of public, wilderness, and military uses has led to questions of compatibility between aircraft and wildlife. We evaluated the effects of simulated low-altitude jet aircraft noise on the behavior and heart rate of captive desert mule deer (n = 6) and mountain sheep (n - 5). We measured heart rate and behavior related to the number of simulated overflights (n = 112 overflights/season) during 3 seasons. The heart rates of ungulates increased related to dB levels during simulated overflights (P {le} 0.05), but they returned to pre-disturbance levels in 60-180 seconds. Animal behavior also changed during overflights but returned to pre-disturbance condition in {le}252 seconds (P {le} 0.005). All animal responses decreased with increased exposure suggesting that they habituated to simulated sound levels of low-altitude aircraft. 43 refs., 5 tabs.

Weisenberger, M.E.; Krausman, P.R.; Wallace, M.C. [Univ. Arizona, Tucson, AZ (United States)] [and others

1996-01-01T23:59:59.000Z

382

Corrosion on aircrafts in marine-tropical environments: A technical analysis  

SciTech Connect (OSTI)

Previous research revealed the aggressiveness of the marine-tropical environment on airframes. Such structures, improperly coated with protective treatments, were easily deteriorated by corrosion in these environments in just a matter of weeks. In addition, the amount of existing salt deposition and lack of anticorrosion maintenance programs adapted to these conditions contributed to the progressive deterioration of the aircraft. Notwithstanding the fact that the corrosive phenomenon is in many cases well understood by the operators, annual costs because of corrosion were still high. Several studies reveal the aeronautic aluminum alloys susceptible to pitting corrosion, exfoliation corrosion, stress-corrosion cracking, intergranular corrosion, and hydrogen embrittlement in a marine-tropical environment. The most affected areas found in the aircrafts were internal and external wing structures, followed by fuselage bilge areas and flight control surfaces. Results of studies made on aeronautical aluminum alloys 2024-T3, 7075-T6, 7020, and 8090 in atmospheres containing ions Cl{sup {minus}}, SO{sub 3}, and polluting dust have established external parameters that influence corrosion, including environmental contamination, temperature, and electrode potential. Internal parameters include alloy composition, thermal treatment, and surface coatings. Correlation of electrochemical tests, and microstructural and atmospheric tests allow a better understanding of the corrosive phenomenon in airframes, establishing criteria for material selection and preventive maintenance programs to guarantee the safe operation of the aircraft.

Alvarez, A. [Univ. of Idaho, Moscow, ID (United States). Inst. for Materials and Advanced Processes

1997-05-01T23:59:59.000Z

383

Design, fabrication and testing of a liquid hydrogen fuel tank for a long duration aircraft  

Science Journals Connector (OSTI)

Liquid hydrogen has distinct advantages as an aircraft fuel. These include a specific heat of combustion 2.8 times greater than gasoline or jet fuel and zero carbon emissions. It can be utilized by fuel cells turbine engines and internal combustion engines. The high heat of combustion is particularly important in the design of long endurance aircraft with liquid hydrogen enabling cruise endurance of several days. However the mass advantage of the liquid hydrogen fuel will result in a mass advantage for the fuel system only if the liquid hydrogen tank and insulation mass is a small fraction of the hydrogen mass. The challenge is producing a tank that meets the mass requirement while insulating the cryogenic liquid hydrogen well enough to prevent excessive heat leak and boil off. In this paper we report on the design fabrication and testing of a liquid hydrogen fuel tank for a prototype high altitude long endurance (HALE) demonstration aircraft. Design options on tank geometry tank wall material and insulation systems are discussed. The final design is an aluminum sphere insulated with spray on foam insulation (SOFI). Several steps and organizations were involved in the tank fabrication and test. The tank was cold shocked helium leak checked and proof pressure tested. The overall thermal performance was verified with a boil off test using liquid hydrogen.

Gary L. Mills; Brian Buchholtz; Al Olsen

2012-01-01T23:59:59.000Z

384

Twin-belt continuous caster with containment and cooling of the exiting cast product for enabling high-speed casting of molten-center product  

DOE Patents [OSTI]

In continuously casting molten metal into cast product by a twin-belt machine, it is desirable to achieve dramatic increases in speed (linear feet per minute) at which cast product exits the machine, particularly in installations where steel cast product is intended to feed a downstream regular rolling mill (as distinct from a planetary mill) operating in tandem with the twin-belt caster. Such high-speed casting produces product with a relatively thin shell and molten interior, and the shell tends to bulge outwardly due to metallostatic head pressure of the molten center. A number of cooperative features enable high-speed, twin-belt casting: (1) Each casting belt is slidably supported adjacent to the caster exit pulley for bulge control and enhanced cooling of cast product. (2) Lateral skew steering of each belt provides an effective increase in moving mold length plus a continuity of heat transfer not obtained with prior art belt steering apparatus. (3) The exiting slab is contained and supported downstream from the casting machine to prevent bulging of the shell of the cast product, and (4) spray cooling is incorporated in the exit containment apparatus for secondary cooling of cast product.

Dykes, Charles D. (303 Shore Rd., Milton, VT); Daniel, Sabah S. (303 Shore Rd., Pittsburgh, PA); Wood, J. F. Barry (303 Shore Rd., Burlington, VT 05401)

1990-02-20T23:59:59.000Z

385

The annual probability of an aircraft crash on the US Department of Energy reservation in Oak Ridge, Tennessee  

SciTech Connect (OSTI)

Aircraft hazards were evaluated to determine the total annual probability of an aircraft crash occurring at any structure located on the US Department of Energy (DOE) reservation in Oak Ridge, Tennessee. This report documents the use of an accepted methodology for calculating the probability of an aircraft crash as applied to the three Oak Ridge plant sites including the adjoining facilities. Based on the data contained herein, the evaluation concluded that the probability of an aircraft crash occurrence at a single facility is generally considered ``not credible`` as defined in DOE/OR-901. Additionally, reevaluation of probabilities would be necessary if significant changes were made to local air traffic. The probability of an aircraft crash could increase as a result of the opening of any new airport or heliport in the vicinity; a greater volume of air traffic from McGhee Tyson airport in Knoxville, should the airport status change from feeder airport to hub airport; the rerouting of commercial and/or military flights at the McGhee Tyson airport; and finally, a change in direction or the addition of a federal airway. At one time, DOE planned to establish a zone of prohibited airspace over the Y-12 plant; if the plans are enacted in the future, the probability of an aircraft crash at the Y-12 plant could decrease. Pilots since have been voluntarily requested not to fly below 3000 feet over the Y-12 plant. Also, the Federal Aviation Administration plans to reroute air traffic in the spring of 1993 on federal airway V16. However, the section of V16 which traverses the three plant sites and five adjoining facilities will not be altered. If this plan is implemented, the air traffic over the Oak Ridge facilities would not be affected significantly, and the probability of an aircraft crash as determined herein would be unchanged.

Seigler, R.S.; Luttrell, L.J.

1992-11-01T23:59:59.000Z

386

Impact of aircraft emissions on air quality in the vicinity of airports. Volume II. An updated model assessment of aircraft generated air pollution at LAX, JFK, and ORD. Final report Jan 1978-Jul 1980  

SciTech Connect (OSTI)

This report documents the results of the Federal Aviation Administration (FAA)/Environmental Protection Agency (EPA) air quality study which has been conducted to assess the impact of aircraft emissions of carbon monoxide (CO), hydrocarbons (HC), and oxides of nitrogen (NOx) in the vicinity of airports. This assessment includes the results of recent modeling and monitoring efforts at Washington National (DCA), Los Angeles International (LAX), Dulles International (IAD), and Lakeland, Florida airports and an updated modeling of aircraft generated pollution at LAX, John F. Kennedy (JFK) and Chicago O'Hare (ORD) airports. The Airport Vicinity Air Pollution (AVAP) model which was designed for use at civil airports was used in this assessment. In addition the results of the application of the military version of the AVAP model the Air Quality Assessment Model (AQAM), are summarized. Both the results of the pollution monitoring analyses in Volume I and the modeling studies in Volume II suggest that: maximum hourly average CO concentrations from aircraft are unlikely to exceed 5 parts per million (ppm) in areas of public exposure and are thus small in comparison to the National Ambient Air Quality Standard of 35 ppm; maximum hourly HC concentrations from aircraft can exceed 0.25 ppm over an area several times the size of the airport; and annual average NO2 concentrations from aircraft are estimated to contribute only 10 to 20 percent of the NAAQS limit level.

Yamartino, R.J.; Smith, D.G.; Bremer, S.A.; Heinold, D.; Lamich, D.

1980-07-01T23:59:59.000Z

387

An experimental investigation of a tilt rotor aircraft wake in ground effect  

E-Print Network [OSTI]

: Sktlld dS t' 1, "~Et 18, 6 (1975), pp. 51-673. Hunt, J. C. R. , Poulton, E. C. , and Mumford, J. C. , "The Effects of Wldppl:Sd't*l Bd tldt lt*p*' t, "~Bi1di Environment, 11 (1976), pp. 15-28. 50 VITA gichael Louis Frey III was born January 4, 1957...EXPERIMENTAL INVESTIGATION OF A TILT ROTOR AIRCRAFT WAKE IN GROUND EFFECT A Thesis by MICHAEL LOUIS FREY III Submi. tted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER...

Frey, Michael Louis

1982-01-01T23:59:59.000Z

388

Aircraft Design  

Science Journals Connector (OSTI)

... his subject is more applied than academic, making it appear to be a designer's handbook rather than a student's text-book. Even then he falls between two stools ... falls between two stools, giving neither enough facts and figures for the one, nor fundamental proofs for the other. Nevertheless the subject matter, so far as it goes, ...

1940-03-09T23:59:59.000Z

389

Aircraft icing  

Science Journals Connector (OSTI)

...accretion calculations for a sphere, a swept MS(1)-317 wing, a swept NACA 0012 wing tip, an axisymmetric inlet and a Boeing 737-300 inlet. In 33rd Aerospace Sciences Meeting and Exhibit, Reno, NV, USA, 9{12 January, AIAA paper 95-0755...

2000-01-01T23:59:59.000Z

390

British Aircraft  

Science Journals Connector (OSTI)

... Trident will be more expensive to fly than the alternatives, one of which is the Boeing 727-200.

1967-12-30T23:59:59.000Z

391

Aircraft Production  

Science Journals Connector (OSTI)

... the new Catalina B.P.Y. flying boat, the Curtiss Tomahawk, the BoeingFlying Fortress and entirely Canadian built Hurricane are now being received in quantities, ...

1941-05-03T23:59:59.000Z

392

Aircraft evolution  

Science Journals Connector (OSTI)

... is comparable with the chance that a tornado sweeping through a junkyard might assemble a Boeing 747 from the materials therein". The simile is glib, meretricious and deceptive. No ... from debris.

THOMAS H. JUKES

1982-02-18T23:59:59.000Z

393

Numerical modeling of air?to?sea transmission of light aircraft noise  

Science Journals Connector (OSTI)

Recent experiments at SIO have shown that the acoustic signature of a light aircraft can be detected by sensors in the water column as well as buried in the underlying sediment and a method for extracting the sound speed and attenuation from this Doppler shifted signal has been proposed. To test the accuracy of this geoacoustic inversion technique a numerical model of the air?water?sediment acoustic propagation including the effects of a high?speed airborne source has been developed based on the spectral method. Simulated acoustic data have been generated representing an aircraft flying over a microphone in the atmosphere a vertical line array in the ocean and a hydrophone buried 1?m deep in the sediment. The results of the geoacoustic inversion for sound speed and attenuation are compared to the known input parameter values of the model giving a sense of the relative errors that may be expected when applying the technique to experimental data. [Work supported by ONR.

2003-01-01T23:59:59.000Z

394

An evaluation of forecasting methods for aircraft non-routine maintenance material demand  

Science Journals Connector (OSTI)

Aircraft maintenance can be divided into routine and non-routine activities. Material demand associated with non-routine maintenance is typically intermittent or lumpy: it has a large variance in frequency and quantity. Consequently, this type of demand is hard to predict. This paper introduces a method to collect time series datasets for aircraft non-routine maintenance material demand. Non-routine material consumption is linked to scheduled maintenance tasks to gain insight in demand patterns. A structural part selection of the Boeing 737NG fleet of an aviation partner has been sampled to generate various test cases. Subsequently, various forecasting methods are applied to these test cases and evaluated using various accuracy metrics. For the small time series datasets associated with non-routine maintenance, exponentially weighted moving average (EMA) outperformed smoothing methods such as Croston's method (CR) and the Syntetos-Boylan approximation (SBA). To validate the practical applicability of EMA for non-routine maintenance material demand, the method has been applied and verified in the prediction of actual demand for a separate maintenance C-check.

Maarten Zorgdrager; Wim J.C. Verhagen; Richard Curran

2014-01-01T23:59:59.000Z

395

Metric assessment of subjective annoyance due to low frequency aircraft noise  

Science Journals Connector (OSTI)

A low frequency noise study was conducted at the Pennsylvania State University to investigate human response to the low frequency content of aviation noise. Metric assessment included level based and loudness metrics including time?varying loudness. Current predictive noise models and metrics may underestimate the impact of low?frequency noise produced by aviation noise. Assessing the role of low frequency noise on human response will facilitate understanding how this type of noise can impact communities. Indoor recordings of aircraft arrivals and departures at Washington Dulles International Airport made in 2004 were used to assess subjective noise annoyance. These recordings and low?frequency variants of these recordings were reproduced for subjects through the Gulfstream Supersonic Acoustic Signature Simulator II (SASS II); the signatures were then rated for annoyance. Subjective judgments were statistically analyzed and compared against objective metrics that were calculated for each signature. Results are shown that all things being equal higher levels of low?frequency content in aircraft noise can result in increased annoyance in subjects. The C?weighted sound exposure level was found to correlate well with the subjective annoyance response.

Kathleen Hodgdon; Matthew L. Nickerson; Anthony A. Atchley; Thomas Gabrielson

2008-01-01T23:59:59.000Z

396

High-speed rail with emerging automobiles and aircraft can reduce environmental impacts in California's future  

Science Journals Connector (OSTI)

Sustainable mobility policy for long-distance transportation services should consider emerging automobiles and aircraft as well as infrastructure and supply chain life-cycle effects in the assessment of new high-speed rail systems. Using the California corridor, future automobiles, high-speed rail and aircraft long-distance travel are evaluated, considering emerging fuel-efficient vehicles, new train designs and the possibility that the region will meet renewable electricity goals. An attributional per passenger-kilometer-traveled life-cycle inventory is first developed including vehicle, infrastructure and energy production components. A consequential life-cycle impact assessment is then established to evaluate existing infrastructure expansion against the construction of a new high-speed rail system. The results show that when using the life-cycle assessment framework, greenhouse gas footprints increase significantly and human health and environmental damage potentials may be dominated by indirect and supply chain components. The environmental payback is most sensitive to the number of automobile trips shifted to high-speed rail, and for greenhouse gases is likely to occur in 2030years. A high-speed rail system that is deployed with state-of-the-art trains, electricity that has met renewable goals, and in a configuration that endorses high ridership will provide significant environmental benefits over existing modes. Opportunities exist for reducing the long-distance transportation footprint by incentivizing large automobile trip shifts, meeting clean electricity goals and reducing material production effects.

Mikhail Chester; Arpad Horvath

2012-01-01T23:59:59.000Z

397

Estimating Hurricane Wind Structure in the Absence of Aircraft Reconnaissance JAMES P. KOSSIN,* JOHN A. KNAFF, HOWARD I. BERGER,* DERRICK C. HERNDON,*  

E-Print Network [OSTI]

estimates the entire two-dimensional surface wind field inside a storm-centered disk with a radius of 182 km- sondes (Hock and Franklin 1999) released from Gulf- stream-IV jet aircraft that routinely fly aircraft flying in the northwest Pacific basin (Wu et al. 2005). For reasons of safety, these small high

Kossin, James P.

398

The Comparative Exploration of the Ice Giant Planets with Twin Spacecraft: Unveiling the History of our Solar System  

E-Print Network [OSTI]

In the course of the selection of the scientific themes for the second and third L-class missions of the Cosmic Vision 2015-2025 program of the European Space Agency, the exploration of the ice giant planets Uranus and Neptune was defined "a timely milestone, fully appropriate for an L class mission". Among the proposed scientific themes, we presented the scientific case of exploring both planets and their satellites in the framework of a single L-class mission and proposed a mission scenario that could allow to achieve this result. In this work we present an updated and more complete discussion of the scientific rationale and of the mission concept for a comparative exploration of the ice giant planets Uranus and Neptune and of their satellite systems with twin spacecraft. The first goal of comparatively studying these two similar yet extremely different systems is to shed new light on the ancient past of the Solar System and on the processes that shaped its formation and evolution. This, in turn, would reveal whether the Solar System and the very diverse extrasolar systems discovered so far all share a common origin or if different environments and mechanisms were responsible for their formation. A space mission to the ice giants would also open up the possibility to use Uranus and Neptune as templates in the study of one of the most abundant type of extrasolar planets in the galaxy. Finally, such a mission would allow a detailed study of the interplanetary and gravitational environments at a range of distances from the Sun poorly covered by direct exploration, improving the constraints on the fundamental theories of gravitation and on the behaviour of the solar wind and the interplanetary magnetic field.

Diego Turrini; Romolo Politi; Roberto Peron; Davide Grassi; Christina Plainaki; Mauro Barbieri; David M. Lucchesi; Gianfranco Magni; Francesca Altieri; Valeria Cottini; Nicolas Gorius; Patrick Gaulme; Franois-Xavier Schmider; Alberto Adriani; Giuseppe Piccioni

2014-02-11T23:59:59.000Z

399

Stacking and twin faults in close-packed crystal structures: exact description of random faulting statistics for the full range of faulting probabilities  

Science Journals Connector (OSTI)

A model of independent random faulting in face-centered-cubic and hexagonal close packing considering single deformation faults or twin faulting is revisited. The approach allows the analysis, within the random model, of the whole range of faulting probabilities. Several descriptions of the underlying faulting process are presented which allows the derivation of different properties of the faulted sequences. The probability of finding two layers of the same type layers apart is derived. It is shown that previous generalizations did not account for mixed terms in the final probability expressions.

Estevez-Rams, E.

2008-08-14T23:59:59.000Z

400

Self-similar propagation and compression of chirped self-similar waves in asymmetric twin-core fibers with nonlinear gain  

Science Journals Connector (OSTI)

Ultrashort-pulse propagation in asymmetric twin-core fiber amplifiers is studied with the aid of self-similarity analysis of the nonlinear Schrdinger-type equation interacting with a source, variable dispersion, variable Kerr nonlinearity, variable gain or loss, and nonlinear gain. Exact chirped pulses that can propagate self-similarly subject to simple scaling rules of this model have been found. It is reported that the pulse position of these chirped pulses can be precisely piloted by appropriately tailoring the dispersion profile. This fact is profitably exploited to achieve optimal pulse compression of these chirped self-similar solutions.

T. Soloman Raju; Prasanta K. Panigrahi; K. Porsezian

2005-10-27T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

International Pacific Air and Space Technology Conference and Aircraft Symposium, 29th, Gifu, Japan, Oct. 7-11, 1991, Proceedings  

SciTech Connect (OSTI)

Various papers on air and space technology are presented. Individual topics addressed include: media selection analysis: implications for training design, high-speed challenge for rotary wing aircraft, high-speed VSTOL answer to congestion, next generation in computational aerodynamics, acrobatic airship 'Acrostat', ducted fan VTOL for working platform, Arianespace launch of Lightsats, small particle acceleration by minirailgun, free-wake analyses of a hovering rotor using panel method, update of the X-29 high-angle-of-attack program, economic approach to accurate wing design, flow field around thick delta wing with rounded leading edge, aerostructural integrated design of forward-swept wing, static characteristics of a two-phase fluid drop system, simplfied-model approach to group combustion of fuel spray, avionics flight systems for the 21st century. Also discussed are: Aircraft Command in Emergency Situations, spectrogram diagnosis of aircraft disasters, shock interaction induced by two hemisphere-cylinders, impact response of composite UHB propeller blades, high-altitude lighter-than-air powered platform, integrated wiring system, auxiliary power units for current and future aircraft, Space Shuttle Orbiter Auxiliary Power Unit status, numerical analysis of RCS jet in hypersonic flights, energy requirements for the space frontier, electrical system options for space exploration, aerospace plane hydrogen scramjet boosting, manual control of vehicles with time-varying dynamics, design of strongly stabilizing controller, development of the Liquid Apogee Propulsion System for ETS-VI.

Not Available

1991-01-01T23:59:59.000Z

402

Method for the assessment of airborne off-target pesticide spray concentrations due to aircraft wing-tip vortex  

E-Print Network [OSTI]

that spherical spray droplets are transported by a two dimensional parametric representation of a spray-engulfing aircraft wing-tip vortex pair. Two distinctive flow regions were considered for the spray-vortex dynamics. The first occurs in the vicinity...

Oliva, Sergio Eduardo

2012-06-07T23:59:59.000Z

403

Counter-rotating vortex patches in shear: a model of the effect of wind shear on aircraft trailing vortices  

Science Journals Connector (OSTI)

...significantly a following passenger-containing aircraft and cause an accident. For example, the vortex wake of a Boeing 747 can rotate a Boeing 737 through 45 . This problem is called the trailing-vortex hazard, and since the trailing vortices can...

2002-01-01T23:59:59.000Z

404

Capturing the impact of fuel price on jet aircraft operating costs with Leontief technology and econometric models  

Science Journals Connector (OSTI)

Investigation of the airline response to a fuel price increase is in effect an investigation of the role of variable interactions in aircraft cost models. We examine the impact of fuel price on aircraft costs and airline operational strategies by developing two classes of operating cost models for jet aircraft and comparing the results. The translog operating cost model is a flexible functional form that provides a detailed representation of the empirical relationship between fuel cost and operating cost, allowing for substitution, scale, aircraft age, and variable interactions to be captured. The simpler Leontief model assumes that inputs of a cost model must be used in fixed proportions regardless of their prices. While it does not capture variable interactions, the Leontief model is more transparent, requires fewer inputs, and allows the contribution of a single factor, such as fuel price, to operating cost to be more easily isolated. An analysis of the translog operating cost model reveals that as fuel price increases, airlines will take steps to use fuel more efficiently by leveraging other inputs; a comparison of the translog and the Leontief technology models, however, show that the potential for this supplier input substitution for fuel is rather modest. By building the two operating cost models and comparing their predictions, we illustrate a method to determine the prediction potential of a Leontief technology model and assess the importance of input substitution at the vehicle level.

Megan Smirti Ryerson; Mark Hansen

2013-01-01T23:59:59.000Z

405

Joint Estimation of NDE Inspection Capability and Flaw-size Distribution for in-service Aircraft Inspections  

E-Print Network [OSTI]

1 Joint Estimation of NDE Inspection Capability and Flaw- size Distribution for in-service Aircraft, Dayton, OH 45469 Abstract: Nondestructive evaluation (NDE) is widely used in the aerospace industry of unknown existing cracks is more difficult. If NDE signal strength is recorded at all inspections

406

Application of dynamic programming approach to aircraft take-off in a N. D. Botkin and V. L. Turova  

E-Print Network [OSTI]

-off, because quick changes of the wind velocity occur at relatively low altitudes. In this paper, a simplified relative velocity V, the relative path inclination , the horizontal distance x, and the altitude h: m V components of the wind velocity, g is the acceleration of gravity, m the aircraft mass, the thrust

Turova, Varvara

407

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

Broader source: Energy.gov (indexed) [DOE]

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

408

Correlated vortex pinning in slightly orthorhombic twinned Ba(Fe1-xCox)2As2 single crystals: Possible shift of the vortex-glass/liquid transition  

SciTech Connect (OSTI)

The interest in twin-boundary (TB) planes as a source of vortex pinning has been recently renewed with the discovery of the new iron-arsenide pnictide superconductors. In the family of compounds Ba(Fe1-xCox)2As2 a structural transition from a tetragonal to orthorhombic lattice takes place for compounds with xxcr) there is no twinning and we find good agreement with the expected scaling function under uncorrelated disorder, with small anisotropy values similar to those reported in the literature. We show that in the orthorhombic samples (x

Bermudez, M. Marziali [Universidad de Buenos Aires; Pasquini, G. [Universidad de Buenos Aires; Budko, Sergey L. [Ames Laboratory; Canfield, Paul C. [Ames Laboratory

2013-02-28T23:59:59.000Z

409

Atmos. Chem. Phys., 9, 57855812, 2009 www.atmos-chem-phys.net/9/5785/2009/  

E-Print Network [OSTI]

. Karl4, S. Urbanski5, E. Atlas6, T. Campos4, Y. Shinozuka7, V. Kapustin7, A. D. Clarke7, A. Weinheimer4 Twin Otter. The initial emissions of up to 49 trace gas or particle species were measured from 20 deforestation and crop residue fires on the Yucatan penin- sula. This included two trace gases useful

Meskhidze, Nicholas

410

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

Science Journals Connector (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

411

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

412

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

413

AP1000{sup R} design robustness against extreme external events - Seismic, flooding, and aircraft crash  

SciTech Connect (OSTI)

Both the International Atomic Energy Agency (IAEA) and the U.S. Nuclear Regulatory Commission (NRC) require existing and new nuclear power plants to conduct plant assessments to demonstrate the unit's ability to withstand external hazards. The events that occurred at the Fukushima-Dai-ichi nuclear power station demonstrated the importance of designing a nuclear power plant with the ability to protect the plant against extreme external hazards. The innovative design of the AP1000{sup R} nuclear power plant provides unparalleled protection against catastrophic external events which can lead to extensive infrastructure damage and place the plant in an extended abnormal situation. The AP1000 plant is an 1100-MWe pressurized water reactor with passive safety features and extensive plant simplifications that enhance construction, operation, maintenance and safety. The plant's compact safety related footprint and protection provided by its robust nuclear island structures prevent significant damage to systems, structures, and components required to safely shutdown the plant and maintain core and spent fuel pool cooling and containment integrity following extreme external events. The AP1000 nuclear power plant has been extensively analyzed and reviewed to demonstrate that it's nuclear island design and plant layout provide protection against both design basis and extreme beyond design basis external hazards such as extreme seismic events, external flooding that exceeds the maximum probable flood limit, and malicious aircraft impact. The AP1000 nuclear power plant uses fail safe passive features to mitigate design basis accidents. The passive safety systems are designed to function without safety-grade support systems (such as AC power, component cooling water, service water, compressed air or HVAC). The plant has been designed to protect systems, structures, and components critical to placing the reactor in a safe shutdown condition within the steel containment vessel which is further surrounded by a substantial 'steel concrete' composite shield building. The containment vessel is not affected by external flooding, and the shield building design provides hazard protection beyond that provided by a comparable reinforced concrete structure. The intent of this paper is to demonstrate the robustness of the AP1000 design against extreme events. The paper will focus on the plants ability to withstand extreme external events such as beyond design basis flooding, seismic events, and malicious aircraft impact. The paper will highlight the robustness of the AP1000 nuclear island design including the protection provided by the unique AP1000 composite shield building. (authors)

Pfister, A.; Goossen, C.; Coogler, K.; Gorgemans, J. [Westinghouse Electric Company LLC, 1000 Westinghouse Drive, Cranberry Township, PA 16066 (United States)

2012-07-01T23:59:59.000Z

414

Assessment of the fire resistance of a nuclear power plant subjected to a large commercial aircraft crash  

Science Journals Connector (OSTI)

The safety assessment of infrastructures, such as a nuclear power plant, for the crash of a large commercial aircraft has been performed worldwide after the terrorism that occurred in the U.S. on September 11, 2001. The assessment, however, has mainly focused on the techniques of impact analysis. In this study, a systematic procedure to assess the fire resistance of containment and auxiliary buildings subjected to such an aircraft crash is proposed. The intensity, duration and distribution of the fire are determined based on aircraft crash analyses and characteristics of jet fuel. A three-dimensional detailed finite element model of the containment and auxiliary buildings is established and used for heat transfer and thermal stress analyses, taking into account the material properties at an elevated temperature. Section forces can then be obtained that are based on a nonlinear stressstrain relationship. The fire resistance of the structure is assessed by comparing the fire-induced section forces with the section resistance which is evaluated using the loadmoment strength interaction diagram. The study addresses the problem whereby the conventional assessment that only considers the flexural behaviour is less accurate. The assessment results support the general conclusion that the nuclear power plant structures can maintain structural integrity against external fire due to their relatively thick sections. The proposed procedure can be extensively applied to evaluate the fire endurance time of any type of structure subjected to an arbitrary fire.

Se-Jin Jeon; Byeong-Moo Jin; Young-Jin Kim

2012-01-01T23:59:59.000Z

415

Vertical Tail Buffeting Alleviation Using Piezoelectric Actuators---Some Results of the Actively Controlled Response of Buffet-Affected Tails (ACROBAT) Program  

Science Journals Connector (OSTI)

Buffet is an aeroelastic phenomenon associated with high performance aircraft especially those with twin vertical tails. In particular, for the F/A-18 aircraft at high angles of attack, vortices emanating from wing/fuselage leading edge extensions burst, ...

Moses Robert W.

1997-04-01T23:59:59.000Z

416

Petrologic constraints on the development of a large-volume, high temperature, silicic magma system: The Twin Falls eruptive centre, central Snake River Plain  

Science Journals Connector (OSTI)

Explosive volcanism associated with the Yellowstone hotspot spanning ~11.3 to 9Ma, thought to have erupted from the Twin Falls eruptive centre, is recorded in the Cassia Mountains of southern Idaho and northern Nevada. The stratigraphy contains intensely welded, rhyolitic (SiO2 6976wt.%) ignimbrites with an anhydrous mineralogy: plagioclase, sanidine, quartz, pigeonite, augite, ilmenite, titanomagnetite, accessory zircon and apatite. Several different thermometers indicate high temperature rhyolitic magmas (>900C). All Cassia Mountain ignimbrites show a significant depletion in ?18OVSMOW with magmatic feldspar values between 1.7 and 3.0, reflecting incorporation of a hydrothermally altered protolith. Multiple compositions of both pigeonite (Mg# 3046) and augite (Mg# 1753) may occur within an individual ignimbrite while crystal aggregates contain only a single composition of each. The compositional heterogeneity within the ignimbrites reflects a complex magmatic system whereby magma was segregated into multiple smaller chambers prior to eruption.

Ben S. Ellis; Tiffany Barry; Michael J. Branney; John A. Wolff; Ilya Bindeman; Rob Wilson; Bill Bonnichsen

2010-01-01T23:59:59.000Z

417

Social survey of the annoyance of low?frequency aircraft ground noise  

Science Journals Connector (OSTI)

Concerns about the appropriateness of representing low?frequency aircraft ground and near?ground noise in A?weighted units and about the adequacy of standard interpretive criteria for assessing community response to low?frequency noises are becoming more common at large civil airports. Residents of a neighborhood adjacent to a busy runway were interviewed to determine the annoyance of runway sideline noise at frequencies below 100 Hz and of its audible manifestations inside homes. Extensive measurements were made to estimate low?frequency noise contours in the interviewing area and street addresses of respondents were geo?coded to permit assignment of low?frequency noise levels to each household. Residents who were highly annoyed by low?frequency sideline noise were concentrated in areas with maximum sound levels summed in one?third octave bands between 25 and 80 Hz (inclusive) that were in excess of 7580 dB. These levels are consistent with Hubbards (1980) estimates of low?frequency airborne sound levels capable of inducing secondary emissions in light architectural elements of residences.

S. Fidell; L. Silvati; S. Lind; K. Pearsons

1999-01-01T23:59:59.000Z

418

Fuel dispersal in high-speed aircraft/soil impact scenarios  

SciTech Connect (OSTI)

The objective of this study is to determine how the jet fuel contained in aircraft wing tanks disperses on impact with a soft terrain, i.e., soils, at high impact velocities. The approach used in this study is to combine experimental and numerical methods. Tests were conducted with an approximately 1/42 linear-scale mass-model of a 1/4 span section of a C-141 wing impacting a sand/clay mixture. The test results showed that within the uncertainty of the data, the percentage of incident liquid mass remaining in the crater is the same as that qualitatively described in earlier napalm bomb development studies. Namely, the percentage of fuel in the crater ranges from near zero for grazing impacts to 25%--50% for high angles of impact. To support a weapons system safety assessment (WSSA), the data from the current study have been reduced to correlations. The numerical model used in the current study is a unique coupling of a Smooth Particle Hydrodynamics (SPH) method with the transient dynamics finite element code PRONTO. Qualitatively, the splash, erosion, and soil compression phenomena are all numerically predicted. Quantitatively, the numerical method predicted a smaller crater cross section than was observed in the tests.

Tieszen, S.R.; Attaway, S.W. [Sandia National Labs., Albuquerque, NM (United States). Engineering Sciences Center

1996-01-01T23:59:59.000Z

419

Love wave surface acoustic wave sensor for ice detection on aircraft  

Science Journals Connector (OSTI)

This paper presents the design fabrication experimental results and theoretical validation of a Love wave surface acoustic wave sensor for detecting the phase change from liquid water to solid ice. The sensing of this phase transition is due to the shear horizontal nature of Love waves which couple to a solid (ice) but not to a liquid (water). An SiO2 film of thickness 3.2 ?m deposited on an ST cut quartz wafer via plasma?enhanced chemical?vapor deposition acts as the guiding layer for Love waves. Testing is carried out with the water or ice placed directly in the propagation path of Love waves. An oscillation frequency shift of 2 MHz is observed when water on the sensor is frozen and melted cyclically. The contribution to the frequency shift is explained in terms of the acousto?electric effect (high permittivity and conductivity of water relative to ice) mass loading and elastic film formation (solid ice). An arrangement for wireless interrogation of the sensor is proposed which is particularly attractive for aircraft and rotorcraft applications obviating the need for complex wiring and local power sources. t

Vasundara V. Varadan; Sunil Gangadharan; Vijay K. Varadan

1999-01-01T23:59:59.000Z

420

Dual-band infrared imaging for quantitative corrosion detection in aging aircraft  

SciTech Connect (OSTI)

Aircraft skin thickness-loss from corrosion has been measured using dual-band infrared (DBIR) imaging on a flash-heated Boeing 737 fuselage structure. The authors mapped surface temperature differences of 0.2 to 0.6 C for 5 to 14 % thickness losses within corroded lap splices at 0.4 seconds after the heat flash. The procedure mapped surface temperature differences at sites without surface-emissivity clutter (from dirt, dents, tape, markings, ink, sealants, uneven paint, paint stripper, exposed metal and roughness variations). They established the correlation of percent thickness loss with surface temperature rise using a partially corroded F-18 wing box and several aluminum panels which had thickness losses from milled flat-bottom holes. The authors mapped the lap splice composite thermal inertia, (k{rho}c){sup 1/2}, which characterized shallow skin defects within the lap splice at early times (<0.3 s) and deeper skin defects within the lap splice at late times (>0.4 s). Corrosion invaded the inside of the Boeing 737 lap splice, beneath the galley and the latrine, where they observed ``pillowing`` from volume build-up of corrosion by-products.

Del Grande, N.K. [Lawrence Livermore National Lab., CA (United States)

1993-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Dual-band infrared imaging for quantitative corrosion detection in aging aircraft  

SciTech Connect (OSTI)

Aircraft skin thickness-loss from corrosion has been measured using dual-band infrared (DBIR) imaging on a flash-heated Boeing 737 fuselage structure. We mapped surface temperature differences of 0.2 to 0.6 {degrees}C for 5 to 14% thickness losses within corroded lap splices at 0.4 seconds after the heat flash. Our procedure mapped surface temperature differences at sites without surface-emissivity clutter (from dirt, dents, tape, markings, ink, sealants, uneven paint, paint stripper, exposed metal and roughness variations). We established the correlation of percent thickness loss with surface temperature rise using a partially corroded F-18 wing box and several aluminum panels which had thickness losses from milled flat-bottom holes. We mapped the lap splice composite thermal inertia, (kpc){sup {1/2}}, which characterized shallow skin defects within the lap splice at early times (<0.3 s) and deeper skin defects within the lap splice at late times (>0.4 s). Corrosion invaded the inside of the Boeing 737 lap splice, beneath the galley and the latrine, where we observed ``pillowing`` from volume build-up of corrosion by-products.

Del Grande, N.K.

1993-11-01T23:59:59.000Z

422

In-Situ Microphysics from the RACORO IOP  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

These files were generated by Greg McFarquhar and Robert Jackson at the University of Illinois. Please contact mcfarq@atmos.uiuc.edu or rjackso2@atmos.uiuc.edu for more information or for assistance in interpreting the content of these files. We highly recommend that anyone wishing to use these files do so in a collaborative endeavor and we welcome queries and opportunities for collaboration. There are caveats associated with the use of the data which are difficult to thoroughly document and not all products for all time periods have been thoroughly examined. This is a value added data set of the best estimate of cloud microphysical parameters derived using data collected by the cloud microphysical probes installed on the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin Otter during RACORO. These files contain best estimates of liquid size distributions N(D) in terms of droplet diameter D, liquid water content LWC, extinction of liquid drops beta, effective radius of cloud drops (re), total number concentration of droplets NT, and radar reflectivity factor Z at 1 second resolution.

McFarquhar, Greg

423

Atmospheric radiation measurement unmanned aerospace vehicle (ARM-UAV) program  

SciTech Connect (OSTI)

ARM-UAV is part of the multi-agency U.S. Global Change Research Program and is addressing the largest source of uncertainty in predicting climatic response: the interaction of clouds and the sun`s energy in the Earth`s atmosphere. An important aspect of the program is the use of unmanned aerospace vehicles (UAVs) as the primary airborne platform. The ARM-UAV Program has completed two major flight series: The first series conducted in April, 1994, using an existing UAV (the General Atomics Gnat 750) consisted of eight highly successful flights at the DOE climate site in Oklahoma. The second series conducted in September/October, 1995, using two piloted aircraft (Egrett and Twin Otter), featured simultaneous measurements above and below clouds and in clear sky. Additional flight series are planned to continue study of the cloudy and clear sky energy budget in the Spring and Fall of 1996 over the DOE climate site in Oklahoma. 3 refs., 4 figs., 1 tab.

Bolton, W.R. [Sandia National Laboratories, Livermore, CA (United States)

1996-11-01T23:59:59.000Z

424

Regenerative fuel cells for High Altitude Long Endurance Solar Powered Aircraft  

SciTech Connect (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

425

Damage tolerance assessment of bonded composite doubler repairs for commercial aircraft applications  

SciTech Connect (OSTI)

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

426

Potential and prospective implementation of carbon nanotubes on next generation aircraft and space vehicles: A review of current and expected applications in aerospace sciences  

Science Journals Connector (OSTI)

Abstract Carbon nanotubes have instigated the interest of many different scientific fields since their authenticated introduction, more than two decades ago. Particularly in aerospace applications, the potential implementations of these advanced materials have been predicted to have a large impact on future aircraft and space vehicles, mainly due to their distinct features, which include superior mechanical, thermal and electrical properties. This article provides the very first consolidated review of the imminent prospects of utilizing carbon nanotubes and nanoparticles in aerospace sciences, based on their recent implementations and predicted future applications. Explicitly, expected carbon nanotube employment in aeronautics and astronautics are identified for commercial aircraft, military aircraft, rotorcraft, unmanned aerial vehicles, satellites, and space launch vehicles. Attention is devoted to future utilization of carbon nanotubes, which may comprise hydrogen storage encapsulation, composite material implementation, lightning protection for aircraft, aircraft icing mitigation, reduced weight of airframes/satellites, and alleviation of challenges related to future space launch. This study further sheds light onto recent actualized implementations of carbon nanotubes in aerospace applications, as well as current and prospective challenges related to their usage in aerospace sciences, encompassing health and safety hazards, large scale manufacturing, achievement of optimum properties, recycling, and environmental impacts.

Omid Gohardani; Maialen Chapartegui Elola; Cristina Elizetxea

2014-01-01T23:59:59.000Z

427

Otter Tail County, Minnesota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

5189435°, -95.8935983° 5189435°, -95.8935983° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":46.5189435,"lon":-95.8935983,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

428

Otter Lake, Michigan: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

133586°, -83.4543963° 133586°, -83.4543963° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":43.2133586,"lon":-83.4543963,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

429

Pesticide and heavy metal residues in Louisiana river otter  

E-Print Network [OSTI]

chromatography. Hercury levels averaged 1. 29 porn in liver (N=100) and 3. 88 ppm in hair (N=24), Liver and hair mercury residues were highly correlated (r=0. 98). Fetal whole body mercury levels averaged 0. 07 ppm (N=4). Fetal and maternal mercury levels... correlations between ani- mal weights and residue levels were observed for mercury, dieldrin, and mirex. There were no apparent relationships between residue levels of mercury and liver weight or liver:carcass weight ratio. There was no significant...

Beck, Debra Lynn

2012-06-07T23:59:59.000Z

430

Subsurface characterization of an oxidation-induced phase transformation and twinning in nickel-based superalloy exposed to oxy-combustion environments  

SciTech Connect (OSTI)

In the integration of oxy-fuel combustion to turbine power generation system, turbine alloys are exposed to high temperature and an atmosphere comprised of steam, CO{sub 2} and O{sub 2}. While surface and internal oxidation of the alloy takes place, the microstructure in the subsurface region also changes due to oxidation. In this study, bare metal coupons of Ni-base superalloys were exposed in oxy-fuel combustion environment for up to 1000 h and the oxidation-related microstructures were examined. Phase transformation occurred in the subsurface region in Ni-based superalloy and led to twinning. The transformation product phases were analyzed through thermodynamic equilibrium calculations and various electron microscopy techniques, including scanning electron microscopy (SEM), orientation imaging microscopy (OIM) and transmission electron microscopy (TEM). The mechanism by which the phase transformation and the formation of the microstructure occurred was also discussed. The possible effects of the product phases on the performance of the alloy in service were discussed.

Zhu, Jingxi; Holcomb, Gordon R.; Jablonski, Paul D.; Wise, Adam; Li, Jia; Laughlin, David E.; Sridhar, Seetharaman

2012-07-30T23:59:59.000Z

431

ON MASS CONSTRAINTS IMPLIED BY THE RELATIVISTIC PRECESSION MODEL OF TWIN-PEAK QUASI-PERIODIC OSCILLATIONS IN CIRCINUS X-1  

SciTech Connect (OSTI)

Boutloukos et al. discovered twin-peak quasi-periodic oscillations (QPOs) in 11 observations of the peculiar Z-source Circinus X-1. Among several other conjunctions the authors briefly discussed the related estimate of the compact object mass following from the geodesic relativistic precession model for kHz QPOs. Neglecting the neutron star rotation they reported the inferred mass M{sub 0} = 2.2 {+-} 0.3 M{sub sun}. We present a more detailed analysis of the estimate which involves the frame-dragging effects associated with rotating spacetimes. For a free mass we find acceptable fits of the model to data for (any) small dimensionless compact object angular momentum j = cJ/GM {sup 2}. Moreover, quality of the fit tends to increase very gently with rising j. Good fits are reached when M {approx} M{sub 0}[1 + 0.55(j + j {sup 2})]. It is therefore impossible to estimate the mass without independent knowledge of the angular momentum and vice versa. Considering j up to 0.3 the range of the feasible values of mass extends up to 3 M{sub sun}. We suggest that similar increase of estimated mass due to rotational effects can be relevant for several other sources.

Toeroek, Gabriel; Bakala, Pavel; Sramkova, Eva; StuchlIk, Zdenek; Urbanec, Martin, E-mail: terek@volny.c, E-mail: pavel.bakala@fpf.slu.c, E-mail: sram_eva@centrum.c, E-mail: zdenek.stuchlik@fpf.slu.c, E-mail: martin.urbanec@fpf.slu.c [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava Bezrucovo nam. 13, CZ-746 01 Opava (Czech Republic)

2010-05-01T23:59:59.000Z

432

The production and decay of the top partner $T$ in the left-right twin higgs model at the ILC and CLIC  

E-Print Network [OSTI]

The left-right twin Higgs model (LRTHM) predicts the existence of the top partner $T$. In this work, we make a systematic investigation for the single and pair production of this top partner $T$ through the processes: $e^{+}e^{-}\\to t\\ov{T} + T\\bar{t}$ and $ T\\ov{T}$, the neutral scalar (the SM-like Higgs boson $h$ or neutral pseudoscalar boson $\\phi^{0}$) associate productions $e^{+}e^{-}\\to t\\ov{T}h +T\\bar{t}h$, $T\\ov{T}h$, $t\\ov{T}\\phi^{0}+T\\bar{t}\\phi^{0}$ and $ T\\ov{T}\\phi^{0}$. From the numerical evaluations for the production cross sections and relevant phenomenological analysis we find that (a) the production rates of these processes, in the reasonable parameter space, can reach the level of several or tens of fb; (b) for some cases, the peak value of the resonance production cross section can be enhanced significantly and reaches to the level of pb; (c) the subsequent decay of $T\\to \\phi^{+}b \\to t\\bar{b}b$ may generate typical phenomenological features rather different from the signals from other new physics models beyond the standard model(SM); and (d) since the relevant SM background is generally not large, some signals of the top partner $T$ predicted by the LRTHM may be detectable in the future ILC and CLIC experiments.

Yao-Bei Liu; Zhen-Jun Xiao

2014-12-13T23:59:59.000Z

433

String loops oscillating in the field of Kerr black holes as a possible explanation of twin high-frequency quasiperiodic oscillations observed in microquasars  

E-Print Network [OSTI]

Small oscillations of current-carrying string loops around stable equilibrium positions corresponding to minima of the effective potential in the equatorial plane of the Kerr black holes are studied using the perturbation method. In the lowest approximation, two uncoupled harmonic oscillators are obtained that govern the radial and vertical oscillations; the higher-order terms determine non-linear phenomena and transition to chaotic motion through quasi-periodic stages of the oscillatory motion. The radial profiles of frequencies of the radial and vertical harmonic oscillations that are relevant also in the quasi-periodic stages of the oscillatory motion are given, and their properties in dependence on the spin of the black holes and the angular momentum and tension of the string loops are determined. It is shown that the radial profiles differ substantially from those corresponding to the radial and vertical frequencies of the geodetical epicyclic motion; however, they have the same mass-scaling and their magnitude is of the same order. Therefore, we are able to demonstrate that assuming relevance of resonant phenomena of the radial and vertical string-loop oscillations at their frequency ratio 3:2, the oscillatory frequencies of string loops can be well related to the frequencies of the twin high-frequency quasi-periodic oscillations (HF QPOs) observed in the microquasars GRS 1915+105, XTE 1550-564, GRO 1655-40. We can conclude that oscillating current-carrying string loops have to be considered as one of the possible explanations of the HF QPOs occurring in the field of compact objects.

Zden?k Stuchlk; Martin Kolo

2014-03-11T23:59:59.000Z

434

Structural Diagnostics of CFRP Composite Aircraft Components by Ultrasonic Guided Waves and Built-In Piezoelectric Transducers  

SciTech Connect (OSTI)

To monitor in-flight damage and reduce life-cycle costs associated with CFRP composite aircraft, an autonomous built-in structural health monitoring (SHM) system is preferred over conventional maintenance routines and schedules. This thesis investigates the use of ultrasonic guided waves and piezoelectric transducers for the identification and localization of damage/defects occurring within critical components of CFRP composite aircraft wings, mainly the wing skin-to-spar joints. The guided wave approach for structural diagnostics was demonstrated by the dual application of active and passive monitoring techniques. For active interrogation, the guided wave propagation problem was initially studied numerically by a semi-analytical finite element method, which accounts for viscoelastic damping, in order to identify ideal mode-frequency combinations sensitive to damage occurring within CFRP bonded joints. Active guided wave tests across three representative wing skin-to-spar joints at ambient temperature were then conducted using attached Macro Fiber Composite (MFC) transducers. Results from these experiments demonstrate the importance of intelligent feature extraction for improving the sensitivity to damage. To address the widely neglected effects of temperature on guided wave base damage identification, analytical and experimental analyses were performed to characterize the influence of temperature on guided wave signal features. In addition, statistically-robust detection of simulated damage in a CFRP bonded joint was successfully achieved under changing temperature conditions through a dimensionally-low, multivariate statistical outlier analysis. The response of piezoceramic patches and MFC transducers to ultrasonic Rayleigh and Lamb wave fields was analytically derived and experimentally validated. This theory is useful for designing sensors which possess optimal sensitivity toward a given mode-frequency combination or for predicting the frequency dependent directivity patterns in a transducer's response. Based upon this theory, a novel approach was developed for passive damage and impact location in anisotropic or geometrically complex systems. The detection and location of simulated ''active'' damage or impacts was experimentally demonstrated on a scaled CFRP honeycomb sandwich wing skin using this technique.

Howard M. Matt

2007-02-15T23:59:59.000Z

435

TIGER -- A technology to improve the delivery capability of nuclear bombs and the survivability of the delivery aircraft  

SciTech Connect (OSTI)

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.

NONE

1980-12-31T23:59:59.000Z

436

Hp-41CV flight performance advisory system (FPAS) for the E-2c, E-2B, and C-2A aircraft. Final technical report Apr-Jun 82  

SciTech Connect (OSTI)

This report describes follow-on work performed under the auspices of AE 4900, Directed Studies in Aeronautical Engineering at the Naval Postgraduate School, to complement the original design of a Flight Performance Advisory System (FPAS) for the E-2C aircraft. The original design fulfilled the requirements of AE 3001, Aircraft Energy Conservation. AE 3001, offered in the Fall Quarter 1981, and conducted by Professor Allen E. Fuhs, was sponsored in part by the Naval Air Development Center (NADC). NADC desired to obtain the input of several fleet experienced aviators in order to design program code for the HP-41CV handheld, programmable calculator that would benefit pilots by providing them with fuel efficiency parameters in flight. Calculators were made available to the participants with the proviso that a completed and operable code for each aircraft be submitted by the end of the academic quarter, September 1981. Upon completion of the E-2C program, attempts were made to use the calculator in flight. One test was conducted informally in an E-2C at RVAW-110, NAS Miramar. Unfortunately, the voltage field induced in the cockpit by the main lobe of the radar passing over the cockpit caused the calculator to cease functioning. The need to devise shielding for the calculator, plus the desire to simplify and improve the existing code lead to this effort.

Ferrell, D.R.

1982-06-01T23:59:59.000Z

437

Synthetic Aperture Radar Movie Gallery -- Sandia National Laboratories  

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

Synthetic Aperture Radar Movie Gallery Synthetic Aperture Radar Movie Gallery This gallery features movies of Sandia National Laboratories' synthetic aperture radar imagery of Albuquerque, New Mexico and Washington, DC. Sandia's Twin-Otter SAR produced these high-resolution stripmap images in real time. (Note: The movies below have been downsampled greatly to make them suitable for viewing on the world wide web. These movies are not recommended for modems of speeds less than 56 kbps due to their large file sizes.) Albuquerque, NM Area Movies Sandia National Laboratories' Twin-Otter SAR produced these Ku-Band 0.3 and 1.0 meter resolution images of Albuquerque, NM in real time. Synthetic aperture radar movie of west Gibson Blvd 0.3 meter airborne synthetic aperture radar movie from I-25 to Maxwell along Gibson Blvd. (Length: 30 seconds)

438

University of Minnesota Twin Cities  

E-Print Network [OSTI]

- Fire Protection Annex I - Facilities Operations/ Utilities Restoration Annex J - Congregate Care Annex K - Finance Annex L - General Counsel Annex M - Hazardous Materials Protection Annex N - Terrorism to ensure the protection of the students, employees and public from the effects of these hazards. This plan

Amin, S. Massoud

439

Comparison of measured Concorde supersonic transport aircraft noise levels to regulatory levels and health and welfare criteria  

Science Journals Connector (OSTI)

A considerable quantity of measured noise level data has been collected for approach and take?off operations of the Anglo?French Concorde Supersonic Transport (SST) aircraft. The largest body of SST noise data has been obtained by the FAA at Dulles International Airport in Virginia and is generally in the form of maximum A?weighted noise level and Effective Perceived Noise Level. However during test flight operations at various airports in the U. S. (in Alaska California Texas and other states) noise data in the form of various noise rating scales including maximum A?weighted and C?weighted level single event noise exposure level (SENEL) perceived noise level (PNL) effective perceived noise level (EPNL) and others have been obtained. There is a requirement to compare the corresponding values of the various noise rating scales to determine ff there are consistent relationships (differences) between them so the noise levels in terms of one rating scale can be predicted from noise levels in the form of another rating scale. This is particularly important since most of the SST data collected is in terms of PNL or EPNL and the proposal in Congressman Glen Anderson's bill (HR 8729) to standardize all noise data to the average day?night level (L dn) will require converting to the SENEL scale. Therefore the available SST data were evaluated and summarized to provide a comparison to the FAA FAR 36 noise limits and to establish conversion factors for transferring from one noise rating scale to another.

S. R. Lane

1978-01-01T23:59:59.000Z

440

Investigations on emission characteristics of the pongamia biodieseldiesel blend fuelled twin cylinder compression ignition direct injection engine using exhaust gas recirculation methodology and dimethyl carbonate as additive  

Science Journals Connector (OSTI)

Experiments were carried out on a twin cylinder direct injection compression ignition engine using pongamia biodieseldiesel blend as fuel with exhaust gas recirculation (EGR) and dimethyl carbonate (DMC) as additive. The experimental results showed that pongamia biodieseldiesel blend fuelled engine with EGR and DMC can simultaneously reduce smoke and nitric oxide ( NO x ) emission. The NO x emission was reduced by about 17.68% for 10% of EGR introduction and about 13.55% increase in smoke emission. When dimethyl carbonate was added with EGR the engine emits lower smoke with lesser NO x emission and it showed that the smoke reduction rate had a linear relationship with DMC percentage. The carbon monoxide (CO) and hydrocarbon (HC) emissions also decreased when DMC was added. However the addition of DMC with EGR caused an increase in both BSEC and BTE.

M. Pandian; S. P. Sivapirakasam; M. Udayakumar

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Quantifying the Magnitude of Anomalous Solar Absorption  

SciTech Connect (OSTI)

The data set from ARESE II, sponsored by the Atmospheric Radiation Measurement Program, provides a unique opportunity to understand solar absorption in the atmosphere because of the combination of three sets of broadband solar radiometers mounted on the Twin Otter aircraft and the ground based instruments at the ARM Southern Great Plains facility. In this study, we analyze the measurements taken on two clear sky days and three cloudy days and model the solar radiative transfer in each case with two different models. On the two clear days, the calculated and measured column absorptions agree to better than 10 Wm-2, which is about 10% of the total column absorption. Because both the model fluxes and the individual radiometer measurements are accurate to no better than 10 Wm-2, we conclude that the models and measurements are essentially in agreement. For the three cloudy days, the model calculations agree very well with each other and on two of the three days agree with the measurements to 20 Wm-2 or less out of a total column absorption of more than 200 Wm-2, which is again agreement at better than 10%. On the third day, the model and measurements agree to either 8% or 14% depending on which value of surface albedo is used. Differences exceeding 10% represent a significant absorption difference between model and observations. In addition to the uncertainty in absorption due to surface albedo, we show that including aerosol with an optical depth similar to that found on clear days can reduce the difference between model and measurement by 5% or more. Thus, we conclude that the ARESE II results are incompatible with previous studies reporting extreme anomalous absorption and can be modeled with our current understanding of radiative transfer.

Ackerman, Thomas P.; Flynn, Donna M.; Marchand, Roger T.

2003-05-16T23:59:59.000Z

442

Aircraft engines. III  

SciTech Connect (OSTI)

Prospective powerplant configuration advancements for tilt-rotor subsonic flight, supersonic commercial flight, and hypersonic flight are speculated upon, with a view to possibilities for the exploitation of novel materials and of such advanced fuels as liquid methane and hydrogen. Attention is given to the foldable tilt-rotor concept, which employs a hydraulic torque converter to engage the fan stage of the high-bypass turbofan engine used in forward flight after the tilt-rotor blades have been stowed, and several advanced cycles and turbomechanical configurations for cruise in the high supersonic regime and beyond, through the hypersonic regime, and into orbital velocity.

Mikkelson, D.C.; Reck, G.M.

1988-01-01T23:59:59.000Z

443

Unraveling Aircraft Impacts  

Science Journals Connector (OSTI)

...References and Notes 1 Meskill T. , Ed. in Current Market Outlook ( Boeing Commercial Airplane Group , Seattle, WA , 1996 ), p. 38...References and Notes T. Meskill, Ed., Current Market Outlook (Boeing Commercial Airplane Group, Seattle, WA, 1996), p. 38...

Randall R. Friedl

1999-10-01T23:59:59.000Z

444

Aircraft in Trouble  

Science Journals Connector (OSTI)

... for the time being at least decided not to vote the funds to keep the Boeing design for a supersonic transport (the SST) alive for another year (until July) ...

1970-12-12T23:59:59.000Z

445

ARM - Measurement - Longwave narrowband upwelling irradiance  

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

narrowband upwelling irradiance narrowband upwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave narrowband upwelling irradiance The total radiant energy, in a narrow band of wavelengths longer than approximately 4 {mu}m, passing through a horizontal unit area in an upward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Field Campaign Instruments OTTER : Twin Otter UAV-EGRETT : UAV-Egrett Value-Added Products LBTM-MINNIS : Minnis Cloud Products Using LBTM Algorithm (Process)

446

Impact of aircraft emissions on air quality in the vicinity of airports. Volume I. Recent airport measurement programs, data analyses, and sub-model development. Final report Jan78-Jul 80  

SciTech Connect (OSTI)

This report documents the results of the Federal Aviation Administration (FAA)/Environmental Protection Agency (EPA) air quality study which has been conducted to assess the impact of aircraft emissions of carbon monoxide (CO), hydrocarbons (HC), and oxides of nitrogen (NOx) in the vicinity of airports. This assessment includes the results of recent modeling and monitoring efforts at Washington National (DCA), Los Angeles International (LAX), Dulles International (IAD), and Lakeland, Florida airports and an updated modeling of aircraft generated pollution at LAX, John F. Kennedy (JFK) and Chicago O'Hare (ORD) airports. The Airport Vicinity Air Pollution (AVAP) model which was designed for use at civil airports was used in this assessment. In addition the results of the application of the military version of the AVAP model the Air Quality Assessment Model (AQAM), are summarized.

Yamartino, R.J.; Smith, D.G.; Bremer, S.A.; Heinold, D.; Lamich, D.

1980-07-01T23:59:59.000Z

447

Geothermal energy development in the eastern United States: technical assistance report no. 5. Geothermal space heating-naval air rework facility, Norfolk, Virginia. [Aircraft hangers  

SciTech Connect (OSTI)

The electronic integration hangar, designated LP-167, was selected for study, as it was a single-story building with a large floor area. Because of the high ceiling and the sliding doors necessary to admit aircraft, the heat loss rate, based on floor area, was about twice that of commercial buildings. It was furnished with an oil-fired hot water heating system capable of high thermal output to meet heating requirements in the coldest weather. On the basis of the known characteristics of geothermal sources for the Atlantic Coastal Plain, and wells drilled and assayed in the Norfolk area, a reasonable estimate of the parameters of a well drilled at NARF was made. This included a low temperature output from the well of only 107/sup 0/F, so that direct transfer of warm water between the wellhead heat exchanger (HX) and the hot water radiating system in the building was not practical. Four design options are explored and calculations are presented on each one.

Hill, F.K.; Henderson, R.W.

1980-06-01T23:59:59.000Z

448

Reproductive success of Mexican spotted owls (Strix occidentalis lucida) in relation to common environmental noise ? biotic, non-military aircraft, and weather-related  

Science Journals Connector (OSTI)

From 2000 to 2005 noise in Mexican spotted owl habitat in the Gila National Forest NM was monitored using an array of Larson-Davis (LD) sound level meters (SLMs). Thirty-nine SLMs were deployed across a 20 km x 24 km area collecting 2-s time interval data mid-April to July resulting in over 350 000 hr of data. Time-history profiles could be used to attribute many events to sources reliably when SNR exceeded the background by 5-10 dB. The events were categorized as biotic (insects and chorusing birds) thunder regional commercial jet aircraft and local air traffic (recreational and firefighting). Measured by the proportion of 2-s samples with LAeq > 60 dB biotic sources and thunder were the most important. Regional commercial jet traffic was the most significant anthropogenic source accounting for 2% of the total. Based on cumulative sound exposure thunder was the greatest contributor. Regression techniques were used to relate owl reproductive success to noise metrics by source. Biotic noise was the only significant correlate highly and positively related to owl reproductive success. The most reasonable interpretation was a strong relationship between biotic noise and owl prey base [Work supported by U.S. Air Force ACC/CEVP.

Ann E. Bowles; Samuel L. Denes; Chris Hobbs; Kenneth J. Plotkin

2012-01-01T23:59:59.000Z

449

Sea otter dental enamel is highly resistant to chipping due to its microstructure  

Science Journals Connector (OSTI)

...for predating hard-shelled marine invertebrates such as abalone...States Geological Survey and Marine Wildlife Veterinary Care and...implications for understanding tooth wear. Mamm. Rev. 43, 34-46...15 Nowak, RM . 2003 Walkers marine mammals of the world. Baltimore...

2014-01-01T23:59:59.000Z

450

Chlorinated hydrocarbon contaminants in feces of river otters from the southern Pacific  

E-Print Network [OSTI]

, and polychlorinated dioxins (PCDDs) and furans (PCDFs), while in 2004, chemistry was confined to PCBs and OC) detected in all samples. In 1998, octachlorodibenzo-p-dioxin (OCDD) and other higher chlorinated PCDD, polychlorinated biphenyls (PCBs), dioxins (PCDDs), furans (PCDFs), polycyclic aromatic hydrocarbons (PAHs

451

Effects Of Sea Otter Colonization On Soft-Sediment Intertidal Prey Assemblages In Glacier Bay, Alaska  

E-Print Network [OSTI]

al. 2012). In mixed or unconsolidated substrate habitats (rocky-reef and mixed or unconsolidated substrate habitat hasrocky substrate and unconsolidated environments highlights

Weitzman, Benjamin Phillip

2013-01-01T23:59:59.000Z

452

Twin Rivers Technologies | Open Energy Information  

Open Energy Info (EERE)

Rivers Technologies Rivers Technologies Address 780 Washington Street Place Quincy, Massachusetts Zip 02169 Sector Biofuels Product Developing vegetable oil based biofuels Website http://www.twinriverstechnolog Coordinates 42.2452749°, -70.9698774° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":42.2452749,"lon":-70.9698774,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

453

Siamese Twins Terry McConnell  

E-Print Network [OSTI]

;13 passuum (the Roman mile) 14 Siamese deadly knight weapon 20 Nancy turndown 23 Lancastrian symbol 25 ever was hosted in Switzerland 37 One making a charge 38 Pre-shipping activity 39 Otitis, tinnitus

McConnell, Terry

454

Twin Cities Campus Architecture M.Arch.  

E-Print Network [OSTI]

design, or related disciplines to pursue multidisciplinary graduate study and research in sustainable building practices and historic preservation. The School of Architecture also offers a concurrent degree

Blanchette, Robert A.

455

Thermodynamics of a stochastic twin elevator  

Science Journals Connector (OSTI)

We study the nonequilibrium thermodynamics of a single particle with two available energy levels, in contact with a classical (Maxwell-Boltzmann) or quantum (Bose-Einstein) heat bath. The particle can undergo transitions between the levels via thermal activation or deactivation. The energy levels are alternately raised at a given rate regardless of occupation by the particle, maintaining a fixed energy gap equal to ? between them. We explicitly calculate the work, heat, and entropy production rates. The efficiency in both the classical and the quantum case goes to a limit between 100 and 50% that depends on the relative rates of particle transitions and level elevation. In the classical problem we explicitly find the large deviation functions for heat, work, and internal energy.

Niraj Kumar; Christian Van den Broeck; Massimiliano Esposito; Katja Lindenberg

2011-11-28T23:59:59.000Z

456

Nanoscale Growth Twins in Sputtered Copper Films  

E-Print Network [OSTI]

.............................................................. 7 I.1.3. Chemical vapor deposition (CVD) .................................... 8 I.2. Fabrication of copper thin films .................................................... 12... to the exposure of the film growth surface to the solution, impurities may be introduced. I.1.3. Chemical vapor deposition (CVD) CVD is a chemical process used to produce high-purity, high-performance thin films and often used in the semiconductor industry...

Anderoglu, Osman

2011-08-08T23:59:59.000Z

457

GLOBALIZATION AND THE TWIN PROTECTIONS Juillet 2007  

E-Print Network [OSTI]

with the help of a global public found mainly financed by developed countries. JEL codes: F13; F16; F18; F59; H

Paris-Sud XI, Université de

458

Rotordynamics of Twin-Screw Pumps  

E-Print Network [OSTI]

, NPSH, and SL [34] ........................................ 57 Figure 45 Unwrapped screw geometry ................................................................................... 59 Figure 46 Meshing-line projection on the unwrapped screw geometry...

Aboel Hassan Muhammed, Ameen

2013-02-26T23:59:59.000Z

459

Psychological Reactions to Aircraft Noise  

Science Journals Connector (OSTI)

...judgments of noisiness is fundamental to the defi-nition...CYCL1000 CO FREQUENCY(IN CYCLES PER SECOND) a 0000 Fig...referenc centered at 1000 cycles per second. [From Kryter...95.5 90.5 90.0 Diesel engine 87.0 79.0 84.5...

Karl D. Kryter

1966-03-18T23:59:59.000Z

460

E-Print Network 3.0 - arc semporna peninsula Sample Search Results  

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

otter (Enhydra lutris) population in the Summary: the Alaska Peninsula were needed. Historic information on population status and trends is sparse for sea... otters along the...

Note: This page contains sample records for the topic "twin otter 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

Lead Levels in Eurasian Otters Decline with Time and Reveal Interactions between Sources, Prevailing Weather, And Stream Chemistry  

Science Journals Connector (OSTI)

Wildlife Veterinary Investigation Centre, Jollys Bottom Farm, Chacewater, Truro, TR4 8PB, U.K. ... Spatial variation in bone Pb was positively correlated with modeled Pb emissions and stream sediment Pb, which interacted negatively with wind-speed and sediment Ca, respectively. ... Most (81%) died in road traffic accidents; other significant causes of death were bite wounds and sepsis (10%). ...

Elizabeth A Chadwick; Victor R Simpson; Abigail E L Nicholls; Frederick M Slater

2011-02-04T23:59:59.000Z

462

Improving aircraft endurance through extremum seeking  

E-Print Network [OSTI]

4.3 Aerodynamics . . . . . . . .Aerodynamics . . . . . . . . . . . . . . . . . . . . . . . .E. , Airplane Drag, Airplane Aerodynamics and Performance,

Krieger, James Paul

2012-01-01T23:59:59.000Z

463

Improving aircraft endurance through extremum seeking  

E-Print Network [OSTI]

time constants Vertical and longitudinal wind speeds, pre-lateral, vertical) Timescale-shifted wind speed Spatial

Krieger, James Paul

2012-01-01T23:59:59.000Z

464

Aircraft Gas Turbine Materials and Processes  

Science Journals Connector (OSTI)

...bears a superficial resem-blance to that obtained by directional...from superplastically formed sheet stock (20, 21). One such...per-mit the use ofnew, improved sheet mate-rials. 4) Multipiece...about four to five times less energy is consumed in go-ing from...

B. H. Kear; E. R. Thompson

1980-05-23T23:59:59.000Z

465

IPrognosis of Aircraft Anomalies 2010 Phase II  

E-Print Network [OSTI]

Algorithms Using High Performance Computing Hardware Optimal Synthesis, Inc. Technical Abstract NASA roles in NASA's ATM research, by parallel implementation on emerging high performance computing (HPC

466

Aircraft Gas Turbine Materials and Processes  

Science Journals Connector (OSTI)

...extend the life of a gas turbine air-foil...withstood higher turbine inlet tem-peratures...invented for the gas-pressure...from over. Remaining to be formu-lated...in rupture life. In addition...fabrication of gas turbine components...

B. H. Kear; E. R. Thompson

1980-05-23T23:59:59.000Z

467

Brian Taggart NOAA Aircraft Operations Center  

E-Print Network [OSTI]

Cetaceans on the upper continental slope in the north-central Gulf of Mexico Keith D. Mullin Wayne Hoggard structures have been in use for oil and gas production. Mineral devel- opment on the continental slope surveys in the oceanic north-central Gulf

468

Demand forecasting for aircraft engine aftermarket  

E-Print Network [OSTI]

In 2006, Pratt and Whitney launched the Global Material Solutions business model aiming to supply spare parts to non-OEM engines with minimum 95% on-time delivery and fill-rate. Lacking essential technical knowledge of the ...

Ho, Kien K. (Kine Kit)

2008-01-01T23:59:59.000Z

469

Aircraft Photography in the Service of Science  

Science Journals Connector (OSTI)

... The sides of these wadis are bare of vegetation, but their bottoms become filled with scrub when reduced to the base level of erosion.

H. HAMSHAW THOMAS

1920-06-10T23:59:59.000Z

470

Aircraft System Identification Using Artificial Neural Networks  

E-Print Network [OSTI]

Artificial neural networks o Require minimal user input o Easily implemented o Robust to noise o Fast #12 interactions between neurons that pass electrochemical signals between each other Artificial neural networks

Valasek, John

471

Aviation Safety Program Aircraft Aging & Durability Project  

E-Print Network [OSTI]

to Other Projects and Programs 8 2. Milestones & Metrics 10 2.1 10-Year Roadmap 10 2.2 Five Year Milestone for Characterization and Validation (1.5) 32 3.2 Level 2 ­ Discipline Level Capabilities 34 3.2.1 NDE / SHM Systems (2 Roadmap. 11 Figure 5. Representative development of capabilities for Detect Theme. 12 Figure 6

472

Aircraft Defence against Barrage Balloon Cables  

Science Journals Connector (OSTI)

... , shot down recently, reveal the fact that these machines are fitted with a balloon cable fender not very different from designs tried by both sides during the latter part of ... on a pylon forward of the nose of the machine. Thus, when meeting a cable it is fended off by being slipped round the wing tip. The weight and ...

1942-01-17T23:59:59.000Z

473

Twin Rivers, New Jersey: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Rivers, New Jersey: Energy Resources Rivers, New Jersey: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 40.2639987°, -74.4912635° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":40.2639987,"lon":-74.4912635,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

474

Twin Falls County, Idaho: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

335252°, -114.6758916° 335252°, -114.6758916° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":42.335252,"lon":-114.6758916,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

475

Twin Lakes, Florida: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

°, -80.1600457° °, -80.1600457° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":26.1809175,"lon":-80.1600457,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

476

Twin Lakes, Colorado: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

6.3819697° 6.3819697° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":39.0827698,"lon":-106.3819697,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

477

Clutter suppression and classification using twin inverted pulse sonar (TWIPS)  

Science Journals Connector (OSTI)

...for example, by ship wakes, breaking...tension and vapour effects, in the absence...generate a TWIPS effect in a broad distribution...seabed through a ship wake, and to provide...modeling bubbles in ship wakes, and their effect on acoustic propagationIn...

2010-01-01T23:59:59.000Z

478

Modeling and control of a twin-screw extruder  

E-Print Network [OSTI]

the optimal quality value and toler- ance for each quality parameter. REG- TOL determines a range of acceptable control settings within the region defined by the quality tolerances. ACKNOW LEDGEMENTS I would like to thank my committee chairman, Dr. Dale...-Lay. Their insight into industry needs provided a clear picture of my objectives. Finally, I would like to thank Brent and Sammi, and other family and friends. I could not have made it without them. Their love and support has constantly been v;ith me and gives me...

Richburg, Leslie Leitzy

1989-01-01T23:59:59.000Z

479

Substrate twinning activates the signal recognition particle and its receptor  

E-Print Network [OSTI]

particle (SRP), which subsequently associates with its receptor (SR). In this complex, the SRP and SR interactions is severed twice on hydrolysis, leading to complex dissociation after cargo delivery. The SRP components of SRP and SR are conserved across all kingdoms. In prokaryotes the SRP is a ribo

Walter, Peter

480

Motion tests of a twin-hulled semi-submersible  

Science Journals Connector (OSTI)

Experimental studies have been carried out on the motions of the model platform under intact, progressive flooding and post flooding conditions. During these extensive experimental studies, two wave heading angles, which are head and beam seas, were taken into account and the motion experiments were repeated for two different GMs. Before the model tests under intact, progressive flooding and post flooding conditions, inclination tests and natural period tests were carried out in order to identify the actual GM of the model and to measure the natural heave, roll and pitch periods of the model. Instrumentation for motion response experiments is described. Descriptions of calibration procedures, motion records and the motion test procedure are given in detail. Only a few of about 110 individual experimental runs performed to measure heave, sway, surge, roll, pitch and yaw motions as well as the flooding mass versus flooding time are presented and discussed.

M. Sylemez

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "twin otter 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

Clutter suppression and classification using twin inverted pulse sonar (TWIPS)  

Science Journals Connector (OSTI)

...fails to detect a linearly scattering body (the , e.g. a fish, mine or seabed) because the returned sonar signal is cluttered...pulses. Even without nonlinearity, this could be used to detect seismic, sedimentary or biomedical displacements, or be used for fault...

2010-01-01T23:59:59.000Z

482

The Financial Services Cluster of the Twin Cities  

E-Print Network [OSTI]

concentration of health insurance carriers, reputation as a state with high quality, low cost health care, and the current push for healthcare reform position Minnesota health insurance carriers to become national leaders and will become a national leader in community banking, developing emerging markets, and cost-effective health

Levinson, David M.

483

Optical Properties of Rotationally Twinned InP Nanowire Heterostructures  

E-Print Network [OSTI]

and hole wave functions. The excitation power dependent blue-shift of the photoluminescence can Box 124, SE-22100 Lund, Sweden Thomas Mårtensson, Johanna Trägårdh, and Lars Samuelson Solid State Physics, Lund UniVersity, PO Box 118, SE-22100 Lund, Sweden Received November 8, 2007; Revised Manuscript

Bao, Jiming

484

Modified shielding jet model for twin-jet shielding analysis  

E-Print Network [OSTI]

the slowing of the jet flow due to turbulent mixing and entrainment of particles from the surrounding medium. The empirical formulations and velocity profiles derived for the respective regions of the jet consider this increase in entrained fluid... velocity profiles are integrated over their respective cross sections of the shielding jet to determine the total volumetric flowrate at the specified locations. A slug flow velocity approximation is then determined for each of the desired downstream...

Gilbride, Jennifer Frances

2012-06-07T23:59:59.000Z

485

Twin Lake, Michigan: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

3.3627922°, -86.164783° 3.3627922°, -86.164783° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","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":43.3627922,"lon":-86.164783,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

486

Geothermal Exploration with Visible through Long Wave Infrared Imaging  

Open Energy Info (EERE)

with Visible through Long Wave Infrared Imaging with Visible through Long Wave Infrared Imaging Spectrometers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Geothermal Exploration with Visible through Long Wave Infrared Imaging Spectrometers Abstract Surface minerals of active geothermal systems have been mapped using visible-short wave infrared and mid wave and long wave imaging spectrometers separately. May and June 2008, the Prospectir sensor and SEBASS (Spatially Enhanced Broadband Array Spectrograph System) were located on together on a roll compensated mount viewing through the same camera port in a Twin Otter. These two imaging spectrometers have similar Instantaneous Fields of View (IFOV) and together collect over 600 channels of spectral information from the visible to the long wave infrared.

487

BOREAS Operations  

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

Study Area Operations/Thompson Airport (NSA-Ops) Study Area Operations/Thompson Airport (NSA-Ops) NSA Operations (NSA-Ops) The Keewatin Air Hanger: site of BOREAS Ops 1994 Dr. Piers Sellers working in Ops, 1994 BOREAS "Air Force" The NASA C-130 The University of Wyoming King Air The NASA Helicopter The NRC Twin Otter The NCAR Electra The Ontario Chieftain Back to the BOREAS Photo Page Index Other Sites: NSA Photos ||NSA-BP Photos | NSA-Fen Photos | NSA-OA Photos | NSA-OBS Photos | NSA-OJP Photos | NSA-UBS Photos | NSA-YJP Photos | NSA-Ops Photos SSA Photos || SSA-Airport Photos | SSA-Fen Photos | SSA-Mix Photos | SSA-OA Photos | SSA-OBS Photos | SSA-OJP Photos | SSA-YA Photos | SSA-YJP Photos | SSA-Ops Photos | ORNL DAAC Home || ORNL Home || NASA || Privacy, Security, Notices || Data Citation || Rate Us || Help |

488

ARM - Publications: Science Team Meeting Documents  

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

A First Look at the Radiative Impact of Tropical Cirrus Systems Encountered A First Look at the Radiative Impact of Tropical Cirrus Systems Encountered During CRYSTAL-FACE Pilewskie, P. (a), Gore, W. (a), Rabbette, M. (b), Howard, S. (b), and Pommier, J. (b), NASA Ames Research Center (a), Bay Area Environmental Research Institute (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting During the 2002 CRYSTAL-FACE experiment we deployed identical solar spectral and broad-band infrared sensors on the ER-2 and CIRPAS Twin Otter in order to characterize the column radiative energy budget in the tropical atmosphere under varying conditions such as thick anvil cirrus, thin sub-visible cirrus, and cloud free conditions. The data are used to determine cirrus and clear sky heating and cooling rates. The solar spectral reflectance and transmittance data are used to infer cloud

489

Wireless Sensor Network forWireless Sensor Network for Aircraft Health MonitoringAircraft Health Monitoring  

E-Print Network [OSTI]

Monitoring Technologies presented here are patent pending. For more details, please send emails to haowei.bai@honeywell.com Haowei Bai Honeywell Labs 3660 Technology Drive Minneapolis, MN 55418 Phone: 612-951-7107 Email: haowei.bai@honeywell Technologies presented here are patent pending. For more details, please send emails to haowei.bai@honeywell

Atiquzzaman, Mohammed

490

About ORNL DAAC Data  

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

Products Products About ORNL DAAC Data Products and Services ORNL DAAC Product Overview The biogeochemical and ecological data products and services available from the ORNL DAAC are organized by project and classified into four primary categories: Field Campaigns, Land Validation, Regional and Global Data, and Model Archive. The following provides access to all available data products: Product Overview Catalog Field Campaigns Field campaigns combine ground-, aircraft-, and satellite-based measurements of biogeochemical features in specific ecosystems over multi-year time periods. The ORNL DAAC compiles, archives, and distributes more than 600 products from the following NASA-funded field campaigns: BOREAS and BOREAS Follow-On FIFE and FIFE Follow-On LBA OTTER SAFARI 2000

491

Spatial distribution of non-native invasive plants following large-scale wind damage at LaRue Pine Hills - Otter Pond Research Natural Area, Union County, Illinois.  

E-Print Network [OSTI]

??The objective of this study was to determine if a large-scale wind disturbance facilitated the invasion of forest interiors by non-native invasive plant species. The (more)

Romano, Anthony John

2012-01-01T23:59:59.000Z

492

Aquatic Mammals 2014, 40(2), 150-161, DOI 10.1578/AM.40.2.2014.150 Spatial and Temporal Variation in River Otter  

E-Print Network [OSTI]

restrictions are appropriately enforced (Tuya et al., 2000; Fanshawe et al., 2003; Greenstreet et al., 2009

Acevedo, Alejandro

493

A Modular Building Controls Virtual Test Bed for the Integrations of Heterogeneous Systems  

E-Print Network [OSTI]

Martin Otter, Proceedings of the 2nd Modelica con- ference.Modelica Association and Deutsches Zen- trum fur Luft- und

Wetter, Michael

2008-01-01T23:59:59.000Z

494

MAMMALIAN SPECIES No. 650, pp. 13, 2 figs. Aonyx congicus. By Serge Larivie`re  

E-Print Network [OSTI]

River, South Cameroon). Greatest length of skull is 143.5 mm. Aonyx congicus (Lo¨nnberg, 1910) Congo monotypic (Wozencraft 1993). DIAGNOSIS. The Congo clawless otter is very similar to the Cape clawless otter (A. capensis), but the 2 species are only sym- patric in Rwanda and Uganda. The Congo clawless otter

Hayssen, Virginia

495

Automated safety and training avionics for general aviation aircraft  

E-Print Network [OSTI]

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...

Trang, Jeffrey Alan

1997-01-01T23:59:59.000Z

496

Optimal Allocation of Transportation Aircraft Actuators during Geanina Andrei1  

E-Print Network [OSTI]

.mora@enac.fr In this communication we consider the problem of the design of an airborne system whose function is to solve the problem function, similar to the load alleviation function, is to control the bending and flexion moments is the i considered moment ({roll, pitch, yaw, bending, flexion}), th k is the deflection of the k actuator

Paris-Sud XI, Université de

497

An Algorithm of Gas Turbine Components in Aircraft  

Science Journals Connector (OSTI)

......following section. The efficiency of an algorithm 0...6. ALIGNMENT OF GAS TURBINE COMPONENTS 141 which...stage. 4. Increasing efficiency It has already been...increase substantially the efficiency of the algorithm, so...problem encountered in gas turbine assembly, only a small......

S. MCKEE; M.B. REED

1986-01-01T23:59:59.000Z

498

Aircraft deconfliction with speed regulation: new models from mixed ...  

E-Print Network [OSTI]

For each instance we report data details, given by the heading angles of .... In Proceedings of the 5th ATM R&D Seminar, Budapest, 2003. [11] J. Kuchar and L.

2012-06-07T23:59:59.000Z

499

Use of Loran-C for general aviation aircraft navigation  

E-Print Network [OSTI]

This report describes an extensive evaluation of Loran-C for use by general aviation. Flight, ground, and antenna tests were done. Flight tests measured the accuracy and the ability to make approaches. Receiver reliability ...

Natarajan, Krishnan

1981-01-01T23:59:59.000Z

500

On Optimization of Sensor Selection for Aircraft Gas  

E-Print Network [OSTI]

#12;2 Overview of presentation · Background · Sensor selection optimization · Probabilistic approach Parameters · 11 Sensors #12;6 Background ­ Engine sensors 1. Core rotor speed 2. Percent low pressure spool;9 Background - Riccati Equation · Kalman filter estimation · K is the Kalman gain for the given sensor set

Simon, Dan