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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,
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.


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

Instrumentation of a light twin aircraft for flow energizer flight tests  

E-Print Network [OSTI]

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

Binford, Robert Susumu

1986-01-01T23:59:59.000Z

3

The Development of Instrumentation and Methods for Measurement of Air-Sea Interaction and Coastal Processes from Manned and Unmanned Aircraft /  

E-Print Network [OSTI]

survey of Glaciar Tyndall, Patagonia. Global and Planetarystudies in Greenland and Patagonia in Twin Otters (Forsberg

Reineman, Benjamin D.

2013-01-01T23:59:59.000Z

4

OTTER3.3  

Energy Science and Technology Software Center (OSTI)

000482UNIXW00 Automated deduction for first-order logic with equality  http://www.mcs.anl.gov/AR/otter/dist33 

5

Aircraft  

DOE Patents [OSTI]

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

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

1998-09-22T23:59:59.000Z

6

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

7

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

8

Feeding Biomechanics & Craniodental Morphology in Otters (Lutrinae)  

E-Print Network [OSTI]

Materials and Methods ........................................................................................ 21 Results????????????????????????????... 31 Discussion???????????????????????????. 45 CHAPTER III ESTIMATED BITE FORCE OF OTTERS... ................................................................................. 65 Materials and Methods ........................................................................................ 66 Results????. ................................................................................................ 73 Discussion...

Timm, Lori L

2013-07-23T23:59:59.000Z

9

afm-04 twin otter: Topics by E-print Network  

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

Texas A&M University - TxSpace Summary: chromatography. Hercury levels averaged 1. 29 porn in liver (N100) and 3. 88 ppm in hair (N24), Liver and hair mercury residues were...

10

ARM - Campaign Instrument - twin-otter-li-prof  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformationbudapest Comments? We would love to heartotdn Comments? WegovInstrumentstrac

11

River otter foraging opportunities at a coastal wetland  

E-Print Network [OSTI]

monitored otter latrines at two wetland types (a saltwater lake and freshwater treatment ponds), 5 times perRiver otter foraging opportunities at a coastal wetland Results DiscussionIntroduction River otters (Lontra canadensis) are the top predator in functioning wetland ecosystems. Kruuk (1995) proposed

Johnson, Matthew

12

Otter Tail Power Co | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County, Vermont:Ottawa County,Otter Lake is a

13

ARM - Campaign Instrument - uav-met-otter  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformationbudapest Comments? We would love to heartotdn Comments?altus Comments? We would lovemet-otter

14

Otter Tail Power Company- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Otter Tail Power Company Rebate Program offers rebates to qualifying residential customers for the installation of high-efficiency equipment upgrades. See the program web site for applicability and...

15

Otter Tail Power Company- Dollar Smart Financing Program  

Broader source: Energy.gov [DOE]

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...

16

Otter Tail Power Company- Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Otter Tail Power Company offers incentives to all of its customers to install energy efficient equipment in their homes or facilities. Rebates are available for high-efficiency electric heating...

17

Otter Tail Power Company- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Otter Tail Power Company offers incentives to all of its commercial customers in South Dakota to install energy efficient equipment in eligible facilities. Rebates are available for geothermal and...

18

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...

19

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

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County, Vermont:Ottawa County,Otter Lake is a villageOtter

20

Pesticide and heavy metal residues in Louisiana river otter  

E-Print Network [OSTI]

of Hg pollution, and hypothesized that Hg was an important cause of the species' decline in Sweden since 1950. There has been no comparable work in North America, but two studies have provided information on tissue levels of contaminants in otter...

Beck, Debra Lynn

1977-01-01T23:59:59.000Z

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.


21

Otter Tail Power Company- Commercial and Industrial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Otter Tail Power Company Rebate Program offers rebates to qualifying commercial, industrial, and agricultural customers for the installation of high-efficiency equipment upgrades. See the program...

22

Otter Tail Power Company- Commercial and Industrial Energy Efficiency Grant Program  

Broader source: Energy.gov [DOE]

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....

23

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

24

Human Impacts on Seals, Sea Lions, and Sea Otters: Integrating Archaeology and Ecology of the Northeast Pacific  

E-Print Network [OSTI]

Review of Human Impacts on Seals, Sea Lions, and Sea Otters: Integrating Archaeology and Ecology of the Northeast Pacific.

Pierotti, Raymond

2013-03-07T23:59:59.000Z

25

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

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County, Vermont:Ottawa County,Otter Lake is a village

26

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

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocusOski Energy LLC Place: Reno, NevadaOtter Tail Power Co

27

Otter Lake, Michigan: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County, Vermont:Ottawa County,Otter Lake is a village in

28

Otter Tail Power Company- DollarSmart Energy Efficiency Loan Program  

Broader source: Energy.gov [DOE]

Otter Tail Power Company's DollarSmart Financing Program offers $150 - $7,000 loans to residential customers and up to $100,000 loans to its business customers. In addition, residential customers...

29

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

30

Observer error in identifying species using indirect signs: analysis of a river otter track survey technique  

E-Print Network [OSTI]

procedure, participants misidentified the tracks of 12 species as otter. Inaccurate identification of indirect signs is a likely source of error in wildlife studies. I recommend that observer skill in identification of indirect signs be measured in order...

Evans, Jonah Wy

2007-09-17T23:59:59.000Z

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

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

33

Refinement in cases of Twinning Lothar Esser  

E-Print Network [OSTI]

Refinement in cases of Twinning Lothar Esser National Cancer Institute Despite working in crystallography for a number of years, it was only recently that I was asked to refine a structure against twinned was twinned using a model of > 99% sequence identity. As the refinement did not progress as it should

34

Photo Identification, Summer Activity Pattern, Estimated Field Metabolic Rate and Territory Quality of Adult Male Sea Otters (Enhydra lutris) in Simpson Bay, Prince William Sound, Alaska  

E-Print Network [OSTI]

and energy budgets, and the assessment of male sea otter territory quality. The Sea Otter Nose Matching Program, or "SONMaP", was developed to identify individual sea otters in Simpson Bay, Prince William Sound, Alaska, using a blotch-pattern recognition...

Finerty, Shannon E.

2010-07-14T23:59:59.000Z

35

Aircraft as a meteorological sensor  

E-Print Network [OSTI]

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

Haak, Hein

36

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

37

EXPERIMENTAL STUDIES OF ALGAL CANOPY INTERACTIONS IN A SEA OTTER-DOMINATED KELP COMMUNITY AT  

E-Print Network [OSTI]

EXPERIMENTAL STUDIES OF ALGAL CANOPY INTERACTIONS IN A SEA OTTER-DOMINATED KELP COMMUNITY three kelp canopy guilds were conducted in a community in which herbivorous invertebrates have been in the haptera of kelps all disappeared following the canopy removal, suggesting that the canopy itself offers

38

PHENOTYPIC PLASTICITY IN AGE AT FIRST REPRODUCTION OF FEMALE NORTHERN SEA OTTERS  

E-Print Network [OSTI]

PHENOTYPIC PLASTICITY IN AGE AT FIRST REPRODUCTION OF FEMALE NORTHERN SEA OTTERS (ENHYDRA LUTRIS phenotypic plasticity. When populations are near carrying capacity (K) or when they are declining due) populations in Alaska provides an opportunity to examine phenotypic plasticity. Using premolar teeth

39

Reversibleirreversible plasticity transition in twinned copper nanopillars  

E-Print Network [OSTI]

Reversible­irreversible plasticity transition in twinned copper nanopillars J.A. Brown, N 31 October 2009 Abstract Through computer simulations, we show that plasticity in twinned copper nanopillar under compression, plastic deformation can be totally reversed when rR is in the range 0:5 6 rR 6

Ghoniem, Nasr M.

40

Identification of Aircraft Hazards  

SciTech Connect (OSTI)

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

K. Ashley

2006-12-08T23:59:59.000Z

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

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

E-Print Network [OSTI]

Sea otter (Enhydra lutris kenyoni) foraging behavior and prey preference (2001- 2004) and the behavior and activity budgets of females with dependent pups (2005- 2010) were studied during the summer (June-August) in Simpson Bay, Prince William Sound...

Wolt, Ryan C.

2014-04-30T23:59:59.000Z

42

TWIN BUILDING LATTICES DO NOT HAVE ASYMPTOTIC CUT-POINTS  

E-Print Network [OSTI]

TWIN BUILDING LATTICES DO NOT HAVE ASYMPTOTIC CUT-POINTS PIERRE-EMMANUEL CAPRACE*, FRANÃ?OIS DAHMANI**, AND VINCENT GUIRARDEL** Abstract. We show that twin building lattices have linear divergence, which implies of asymptotic cones of twin building lattices. Theorem 1. The asymptotic cones of a twin building lattice do

Caprace, Pierre-Emmanuel

43

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

44

ARM - Other Aircraft Campaigns  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearchWarmingMethane BackgroundFacilityOther Aircraft Campaigns AAF

45

Aquatic Mammals 2014, 40(3), 243-251, DOI 10.1578/AM.40.3.2014.243 Hearing in Sea Otters (Enhydra lutris): Audible Frequencies  

E-Print Network [OSTI]

are relevant to improv- ing understanding of sea otter acoustic communi- cation, evolutionary biology to examine the acoustic detection capabilities of species for which little data are available and for which). Sea otters are particularly sensitive to anthropo- genic pollution and disturbance (U.S. Fish

Reichmuth, Colleen

46

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

47

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

48

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

49

ORIGINAL PAPER Twin-Screw Extrusion Processing of Distillers Dried  

E-Print Network [OSTI]

. Physical properties . Protein . Twin-screw extruder Introduction As a consequence of changes in energyORIGINAL PAPER Twin-Screw Extrusion Processing of Distillers Dried Grains with Solubles (DDGS. Twin- screw extrusion studies were performed to investigate the production of nutritionally balanced

50

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

51

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

52

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

53

Twinning effect on photoluminescence spectra of ZnSe nanowires  

SciTech Connect (OSTI)

Bandgap engineering in a single material along the axial length of nanowires may be realized by arranging periodic twinning, whose twin plane is vertical to the axial length of nanowires. In this paper, we report the effect of twin on photoluminescence of ZnSe nanowires, which refers to the bandgap of it. The exciton-related emission peaks of transverse twinning ZnSe nanowires manifest a 10-meV-blue-shift in comparison with those of longitudinal twinning ZnSe nanowires. The blue-shift is attributed to quantum confinement effect, which is influenced severely by the proportion of wurtzite ZnSe layers in ZnSe nanowires.

Xu, Jing; Wang, Chunrui, E-mail: crwang@dhu.edu.cn; Wu, Binhe; Xu, Xiaofeng [Department of Applied Physics and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 Renmin Rd. North, Songjiang District, Shanghai 201620 (China); Chen, Xiaoshuang [Department of Applied Physics and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 Renmin Rd. North, Songjiang District, Shanghai 201620 (China); National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083 (China); Oh, Hongseok; Baek, Hyeonjun; Yi, Gyu-Chul [Department of Physics and Astronomy, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-747 (Korea, Republic of)

2014-11-07T23:59:59.000Z

54

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

55

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

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 communication systems: Topics by E-print Network  

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

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

58

aircraft system concept: Topics by E-print Network  

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

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

59

A Mechanism-based Model for Deformation Twinning in Polycrystalline...  

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

in Polycrystalline FCC Steel. Abstract: Deformation twinning, a common and important plastic deformation mechanism, is the key contributor to the excellent combination of...

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

Application for Presidential Permit OE Docket No. PP-366 Twin...  

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

transmission facilities at the U.S. - Canada Border. Application for Presidential Permit OE Docket No. PP-366 Twin Rivers Paper Company, Inc. More Documents & Publications...

62

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.

63

Propulsion system concepts for silent aircraft  

E-Print Network [OSTI]

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

Manneville, Alexis, 1978-

2004-01-01T23:59:59.000Z

64

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...

65

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

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. 14 figs.

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

1996-01-16T23:59:59.000Z

67

AIAA 20033698 Aircraft Gas Turbine Engine  

E-Print Network [OSTI]

AIAA 2003­3698 Aircraft Gas Turbine Engine Simulations W. C. Reynolds , J. J. Alonso, and M. Fatica, Reston, VA 20191­4344 #12;AIAA 2003­3698 Aircraft Gas Turbine Engine Simulations W. C. Reynolds , J. J of the flowpath through complete aircraft gas turbines including the compressor, combustor, turbine, and secondary

Stanford University

68

Twin Falls District | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:ToyoTurkey: EnergyGeothermal AreaBML Twin Falls

69

Clean Cities: Twin Cities Clean Cities coalition  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationClean Communities of Western NewSouth Shore CleanSt.Tucson CleanTwin

70

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

71

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

E-Print Network [OSTI]

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

Yutko, Brian M. (Brian Matthew)

2011-01-01T23:59:59.000Z

72

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

E-Print Network [OSTI]

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

Yutko, Brian

2011-06-27T23:59:59.000Z

73

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

74

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

75

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

76

ARM - Field Campaign - Aircraft Carbon  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience4AJ01)3, 2010SeptemberInfraredgovCampaignsAircraft Carbon ARM Data

77

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

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

Aircraft towing feasibility study. Final report  

SciTech Connect (OSTI)

Energy costs and availability are major concerns in most parts of the world. Many ways of increasing energy supply and reducing consumption are being proposed and investigated. One that holds considerable promise is the extended towing of aircraft between airport runways and terminal gate areas with engines shut down. This study provides a preliminary assessment of the constraints on and feasibility of extended aircraft towing. Past aircraft towing experience and the state-of-the-art in towing equipment are reviewed. Safety and operational concerns associated with aircraft towing are identified, and the benefits and costs of implementing aircraft towing at 20 major US airports are analyzed. It was concluded that extended aircraft towing is technically feasible and that substantial reductions in aircraft fuel consumption and air pollutant emissions can be achieved through its implementation. It was also concluded that, although capital and operating costs associated with towing would be increased, net savings could generally be attained at these airports. Because of the lack of past experience and the necessity of proving the cost effectiveness of the towing concept, a demonstration of the feasibility of large-scale aircraft towing is necessary. The study evaluates the suitability of the 20 study airports as potential demonstration sites and makes recommendations for the first demonstration project.

Not Available

1980-09-01T23:59:59.000Z

80

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.

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

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...

82

aircraft carrier program: Topics by E-print Network  

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

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

83

aircraft cabin safety: Topics by E-print Network  

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

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

84

air force aircraft: Topics by E-print Network  

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

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

85

aircraft cabin section: Topics by E-print Network  

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

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

86

aircraft cabins: Topics by E-print Network  

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

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

87

aircraft cabin noise: Topics by E-print Network  

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

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

88

aircraft exhaust aerosol: Topics by E-print Network  

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

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

89

aircraft load measurement: Topics by E-print Network  

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

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

90

aircraft cabin environment: Topics by E-print Network  

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

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

91

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...

92

Application to Export Electric Energy OE Docket No. EA-358 Twin...  

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

Twin Cities Energy, LLC to export electric energy to Canada Application to Export Electric Energy OE Docket No, EA-358 Twin Cities Energy, LLC More Documents & Publications EA-358...

93

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...

94

September 7, 2009 Thank you for your recent critique of our Twin Lakes Enhancement Proposal (#2008-  

E-Print Network [OSTI]

recycling. Summertime "habitat squeeze" was clearly identified as the primary limitation for salmonids in Twin Lakes. These studies led to the construction of the oxygenation system in North Twin in 2008 which

95

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

96

Statistical estimation of multiple faults in aircraft gas turbine engines  

E-Print Network [OSTI]

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

Ray, Asok

97

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

98

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

99

Twin Falls, Idaho: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:ToyoTurkey: EnergyGeothermal AreaBML TwinTwin

100

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

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

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

E-Print Network [OSTI]

Santo, Jr. , B. S. , United States Air Force Academy Directed by: Dr. Balusu M. Rao A method is developed to predict the changes in the aerodynamic forces and moments on an aircraft as it passes through the trailing vortex system of another aircraft... as the test aircraft. The dynamic response of the test aircraft to an encounter with a trailing vortex system is predicted using a linear and a non-linear set of equations of motion. The calculated aerodynamic forces and moments are treated as forcing...

De Santo, Robert James William

2012-06-07T23:59:59.000Z

102

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

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

on Aircraft and Aircraft Ground Support Fuel Cell Applications 12... ;Topics The US Fuel Cell Council Aircraft and ... Source: DOE Office of Energy Efficiency and Renewable...

103

E-Print Network 3.0 - aircraft Sample Search Results  

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

AIRCRAFT TAXI Summary: AIRCRAFT TAXI TIMES AT THE DALLAS FORT WORTH INTERNATIONAL AIRPORT Sivakumar Rathinam, Justin Montoya, Yoon... model for an aircraft taxi-scheduling...

104

E-Print Network 3.0 - aircraft navigation radios Sample Search...  

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

FOR REDUCING AIRCRAFT TAXI Summary: AIRCRAFT TAXI TIMES AT THE DALLAS FORT WORTH INTERNATIONAL AIRPORT Sivakumar Rathinam, Justin Montoya, Yoon... model for an aircraft...

105

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

106

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

E-Print Network [OSTI]

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

Xu , Huan

107

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

108

The cost of noise reduction in commercial tilt rotor aircraft  

E-Print Network [OSTI]

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

Faulkner, Henry B.

1974-01-01T23:59:59.000Z

109

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

110

Stratospheric aircraft: Impact on the stratosphere  

SciTech Connect (OSTI)

The steady-state distribution of natural stratospheric ozone is primarily maintained through production by ultraviolet photolysis of molecular oxygen, destruction by a catalytic cycle involving nitrogen oxides (NO{sub x}), and relocation by air motions within the stratosphere. Nitrogen oxides from the exhausts of a commercially viable fleet of supersonic transports would exceed the natural source of stratospheric nitrogen oxides if the t should be equipped with 1990 technology jet engines. This model-free comparison between a vital natural global ingredient and a proposed new industrial product shows that building a large fleet of passenger stratospheric aircraft poses a significant global problem. NASA and aircraft industries have recognized this problem and are studying the redesign of jet aircraft engines in order to reduce the nitrogen oxides emissions. In 1989 atmospheric models identified two other paths by which the ozone destroying effects of stratospheric aircraft might be reduced or eliminated: (1) Use relatively low supersonic Mach numbers and flight altitudes. For a given rate of nitrogen oxides injection into the stratosphere, the calculated reduction of total ozone is a strong function of altitude, and flight altitudes well below 20 kilometers give relatively low calculated ozone reductions. (2) Include heterogeneous chemistry in the two-dimensional model calculations. Necessary conditions for answering the question on the title above are to improve the quality of our understanding of the lower stratosphere and to broaden our knowledge of hetergeneous stratospheric chemistry. This article reviews recently proposed new mechanisms for heterogeneous reactions on the global stratospheric sulfate aerosols.

Johnston, H.

1992-02-01T23:59:59.000Z

111

Stratospheric aircraft: Impact on the stratosphere?  

SciTech Connect (OSTI)

The steady-state distribution of natural stratospheric ozone is primarily maintained through production by ultraviolet photolysis of molecular oxygen, destruction by a catalytic cycle involving nitrogen oxides (NO{sub x}), and relocation by air motions within the stratosphere. Nitrogen oxides from the exhausts of a commercially viable fleet of supersonic transports would exceed the natural source of stratospheric nitrogen oxides if the t should be equipped with 1990 technology jet engines. This model-free comparison between a vital natural global ingredient and a proposed new industrial product shows that building a large fleet of passenger stratospheric aircraft poses a significant global problem. NASA and aircraft industries have recognized this problem and are studying the redesign of jet aircraft engines in order to reduce the nitrogen oxides emissions. In 1989 atmospheric models identified two other paths by which the ozone destroying effects of stratospheric aircraft might be reduced or eliminated: (1) Use relatively low supersonic Mach numbers and flight altitudes. For a given rate of nitrogen oxides injection into the stratosphere, the calculated reduction of total ozone is a strong function of altitude, and flight altitudes well below 20 kilometers give relatively low calculated ozone reductions. (2) Include heterogeneous chemistry in the two-dimensional model calculations. Necessary conditions for answering the question on the title above are to improve the quality of our understanding of the lower stratosphere and to broaden our knowledge of hetergeneous stratospheric chemistry. This article reviews recently proposed new mechanisms for heterogeneous reactions on the global stratospheric sulfate aerosols.

Johnston, H.

1992-02-01T23:59:59.000Z

112

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.

113

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

114

Computational fire modeling for aircraft fire research  

SciTech Connect (OSTI)

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

Nicolette, V.F.

1996-11-01T23:59:59.000Z

115

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...

116

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...

117

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

118

EA-344-A Twin Cities Power | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergy DOEDealingVehicle1 Closing American Electric0-A S.A.C.94-A Twin

119

EA-358 Twin Cities Energy, LLC | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergy DOEDealingVehicle1 Closing American Electric0-A S.A.C.94-A-B18 Twin

120

PP-366 Twin Rivers Paper Company, Inc. | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15, 2010Energy6 Frontera Generation Limited15 Trico Electric26 Twin

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121

Twin Falls, Idaho: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:ToyoTurkey: EnergyGeothermal AreaBML Twin

122

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

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTaguspark JumpDetective:ToyoTurkey: EnergyGeothermal AreaBMLII (07)Twin

123

Fermilab Today | University of Minnesota - Twin Cities Profile  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility ofSmall Works:Oklahomaat Chicago May 16,Maryland- Twin

124

Twin Valley Electric Coop Inc | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop, IncTipmontInformationKentucky)Bank,Turkmenistan:Pwr AssnTwin

125

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.

126

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.

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

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

129

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

130

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

131

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

132

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

133

Developing a Model for Car Sharing Potential in Twin Cities Neighborhoods James Andrew  

E-Print Network [OSTI]

Developing a Model for Car Sharing Potential in Twin Cities Neighborhoods James Andrew Masters neighborhoods in the Twin Cities of Minneapolis and St. Paul, Minnesota for their amenability to car sharing, a study of the market and use of car sharing programs in the United States was conducted through

Levinson, David M.

134

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

135

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. Ã? 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Keywords: Copper

Ghoniem, Nasr M.

136

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

137

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

138

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

139

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

140

aircraft composite structures: Topics by E-print Network  

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

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

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.


141

aircraft production: Topics by E-print Network  

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

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

142

aircraft engine missile: Topics by E-print Network  

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

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

143

aircraft integrated vehicle: Topics by E-print Network  

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

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

144

aircraft conceptual design: Topics by E-print Network  

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

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

145

aircraft emission inventories: Topics by E-print Network  

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

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

146

aircraft engine crash: Topics by E-print Network  

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

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

147

aircraft accidentally crashing: Topics by E-print Network  

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

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

148

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

149

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

150

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

151

Aircraft S-HIS Observations during MPACE  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout the BuildingInnovation 2011OversupplyPlasmaAir-BreathingAircraft

152

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

153

Heterologous protein production using the twin arginine translocation pathway  

DOE Patents [OSTI]

Provided are means for evaluating and identifying putative substrates of the twin arginine translocation (Tat) secretory pathway in Streptomyces and other bacterial species. Also provided, therefore, are simple ways to express, secrete and purify correctly folded heterologous proteins on a large scale using host microorganisms, such as, Streptomyces and the Tat pathway therein. Many of the thus-produced proteins are of significant therapeutic value in the pharmaceutical and biochemical industries, particularly when they can be secreted from the host in fully-folded active form. Accordingly, there are further provided the heterologous proteins produced by the Tat secretion pathway using the foregoing methods, and the computer algorithm used to identify the Tat signal sequence and putative substrates.

Pohlschroder, Mechtild (Philadelphia, PA); Kissinger, Jessica C (Athens, GA); Rose, R. Wesley (Glenside, PA); Brueser, Thomas (Halle, DE); Dilks, Kieran (Collingswood, NJ)

2008-11-04T23:59:59.000Z

154

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

E-Print Network [OSTI]

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

155

AIRCRAFT PARAMETRIC STRUCTURAL LOAD MONITORING USING GAUSSIAN PROCESS REGRESSION  

E-Print Network [OSTI]

, Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD 2 Technology of aircraft usage and thus to provide the operator with an accurate estimate of the remaining useful life in an aircraft usage monitoring context. The GP predictions for strain are compared to the actual measurements

Boyer, Edmond

156

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

157

Symbolic identification for fault detection in aircraft gas turbine engines  

E-Print Network [OSTI]

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

Ray, Asok

158

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

159

A New Methodology for Aircraft HVDC Power Systems design  

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

160

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

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

Data Mining For Prediction of Aircraft Component Replacement  

E-Print Network [OSTI]

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

Matwin, Stan

162

E-Print Network 3.0 - aircraft structural applications Sample...  

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

. . . . . . . . . . . . . . . . . . . . . . 22 3.2 Aircraft - The Physical Nodes... , demand for a new class of very light aircraft threatens to further clog the system, rendering...

163

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

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

wiring of that age... in an older aircraft. 1 12; aircraft wiring, and electromagnetic interference issues. Section 4 refutes... and wet" wire were ... Source: Ladkin, Peter...

164

E-Print Network 3.0 - aircraft safety Sample Search Results  

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

safety Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft safety Page: << < 1 2 3 4 5 > >> 1 Safety Verification of the Small Aircraft...

165

E-Print Network 3.0 - airports aircraft noise Sample Search Results  

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

4... that "support aircraft operations including runways, taxiways, aprons, noise abatement, land purchase... to standards for the aircraft that use them (FAA 2008; p. v). The...

166

E-Print Network 3.0 - avoiding illuminating aircraft Sample Search...  

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

necessary to avoid one... AIRCRAFT TAXI TIMES AT THE DALLAS FORT WORTH INTERNATIONAL AIRPORT Sivakumar Rathinam, Justin Montoya, Yoon... model for an aircraft taxi-scheduling...

167

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

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

;Topics The US Fuel Cell Council Aircraft and Aircraft ... Source: DOE Office of Energy Efficiency and Renewable Energy, Hydrogen, Fuel Cells and Infrastructure...

168

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

E-Print Network [OSTI]

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

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

2004-01-01T23:59:59.000Z

169

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...

170

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...

171

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...

172

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...

173

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...

174

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...

175

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

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

Summary: for deceleration during landing, it is proposed that aircraft can use wheel brakes only for stopping. It is also... proposed that using an aircraft tow for...

176

Frequency Analysis of Aircraft hazards for License Application  

SciTech Connect (OSTI)

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

K. Ashley

2006-10-24T23:59:59.000Z

177

Genome, Epigenome and RNA sequences of Monozygotic Twins Discordant for Multiple Sclerosis  

SciTech Connect (OSTI)

Neil Miller, Deputy Director of Software Engineering at the National Center for Genome Resources, discusses a monozygotic twin study on June 2, 2010 at the "Sequencing, Finishing, Analysis in the Future" meeting in Santa Fe, NM

Miller, Neil [National Center for Genome Resources

2010-06-02T23:59:59.000Z

178

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

179

Nanostructured Ni-Co Alloys with Tailorable Grain Size and Twin Density  

E-Print Network [OSTI]

grain sizes and twin densities in the Ni-Co binary system. Using electrodeposition with various applied nanocrystalline nickel. I. INTRODUCTION BULK nanocrystalline materials are characterized by a large volume

Ferreira, Paulo J.

180

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

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

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

182

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

183

Off-design performance characteristics of a twin shaft gas turbine engine with regeneration  

E-Print Network [OSTI]

OFF-DESIGN PERFORMANCE CHARACTERISTICS OF A TWIN SHAFT GAS TURBINE ENGINE WITH RECTION A 'Ihesis TODD STEWART LECKIE Submitted to the Graduate College Texas ABM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1984 Major Subject: Mechanical Engineering OFF-DESIGN PERFORMANCE CHARACTERISTICS OF A TWIN SHAFT GAS TURBINE ENGINE WITH REGENERATION A Thesis by Approved as to style and content by: er E. J 'ns rrman of Corrmittee) Je- 'n Han...

Leckie, Todd Stewart

1984-01-01T23:59:59.000Z

184

THE FUTURE OF THE SUN: AN EVOLVED SOLAR TWIN REVEALED BY CoRoT  

SciTech Connect (OSTI)

The question of whether the Sun is peculiar within the class of solar-type stars has been the subject of active investigation over the past three decades. Although several solar twins have been found with stellar parameters similar to those of the Sun (albeit in a range of Li abundances and with somewhat different compositions), their rotation periods are unknown, except for 18 Sco, which is younger than the Sun and with a rotation period shorter than solar. It is difficult to obtain rotation periods for stars of solar age from ground-based observations, as a low-activity level implies a shallow rotational modulation of their light curves. CoRoT has provided space-based long time series from which the rotation periods of solar twins as old as the Sun could be estimated. Based on high-signal-to-noise, high-resolution spectroscopic observations gathered at the Subaru Telescope, we show that the star CoRoT ID 102684698 is a somewhat evolved solar twin with a low Li abundance. Its rotation period is 29 {+-} 5 days, compatible with its age (6.7 Gyr) and low lithium content, A{sub Li} {approx}< 0.85 dex. Interestingly, our CoRoT solar twin seems to have enhanced abundances of the refractory elements with respect to the Sun, a typical characteristic of most nearby twins. With a magnitude V {approx_equal} 14.1, ID 102684698 is the first solar twin revealed by CoRoT, the farthest field solar twin so far known, and the only solar twin older than the Sun for which a rotation period has been determined.

Do Nascimento, J.-D. Jr.; Da Costa, J. S.; Castro, M. [Departamento de Fisica Teorica e Experimental (DFTE), Universidade Federal do Rio Grande do Norte (UFRN), CP 1641, 59072-970 Natal, RN (Brazil); Takeda, Y. [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Melendez, J. [Departamento de Astronomia do IAG/USP, Universidade de Sao Paulo, Rua do Matao 1226, 05508-900 Sao Paulo, SP (Brazil); Porto de Mello, G. F., E-mail: dias@dfte.ufrn.br [Observatrio do Valongo, UFRJ, Ladeira do Pedro Antonio 43, 20080-090 Rio de Janeiro, RJ (Brazil)

2013-07-10T23:59:59.000Z

185

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

E-Print Network [OSTI]

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

Simon, Dan

186

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

187

ARM - Campaign Instrument - otter  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation DesertgovInstrumentsap-surfgovInstrumentsnfov Comments? We would love

188

Development of a high power density motor for aircraft propulsion  

E-Print Network [OSTI]

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

Dibua, Imoukhuede Tim Odion

2007-04-25T23:59:59.000Z

189

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

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

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

190

Remote sensing of terrestrial tropospheric aerosols from aircraft and satellites  

E-Print Network [OSTI]

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

191

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

192

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

193

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

194

aircraft braking system: Topics by E-print Network  

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

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

195

aircraft transportation system: Topics by E-print Network  

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

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

196

aircraft hydraulic systems: Topics by E-print Network  

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

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

197

aircraft ab prib: Topics by E-print Network  

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

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

198

Six Degree of Freedom Morphing Aircraft Dynamical Model with Aerodynamics  

E-Print Network [OSTI]

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

Niksch, Adam

2010-01-14T23:59:59.000Z

199

Automated safety and training avionics for general aviation aircraft  

E-Print Network [OSTI]

rates involving these aircraft. In an attempt to improve safety factors and training programs for this aviation sector, researchers at Texas A&M University are investigating "smart cockpit systems." This research program is titled Automated Safety...

Trang, Jeffrey Alan

1997-01-01T23:59:59.000Z

200

Value-based multidisciplinary optimization for commercial aircraft program design  

E-Print Network [OSTI]

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

Peoples, Ryan E

2004-01-01T23:59:59.000Z

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

Intelligent weather agent for aircraft severe weather avoidance  

E-Print Network [OSTI]

avoidance capability has increased. In this thesis, an intelligent weather agent is developed for general aviation aircraft. Using a radar image from an onboard weather radar, the intelligent weather agent determines the safest path around severe weather...

Bokadia, Sangeeta

2002-01-01T23:59:59.000Z

202

Hybrid wing-body aircraft noise and performance assessment  

E-Print Network [OSTI]

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

Weed, Philip Andrew

2010-01-01T23:59:59.000Z

203

aircraft interior noise: Topics by E-print Network  

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

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

204

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

205

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

206

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.

207

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

208

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

209

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.

André Thüring; Christian Gräf; Henning Vahlbruch; Moritz Mehmet; Karsten Danzmann; Roman Schnabel

2010-05-25T23:59:59.000Z

210

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

211

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

212

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

213

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

214

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

215

Prediction of Channel Thermal Noise in Twin Silicon Nanowire MOSFET (TSNWFET)  

E-Print Network [OSTI]

proportional to the drain driving current. 3. Derivation of channel thermal noise For analyzing channel thermal effects, the power spectral density equation of channel thermal noise suitable for short channelPrediction of Channel Thermal Noise in Twin Silicon Nanowire MOSFET (TSNWFET) Jaehong Lee, Jongwook

Lee, Jong Duk

216

Preparation of high-strength nanometer scale twinned coating and foil  

DOE Patents [OSTI]

Very high strength single phase stainless steel coating has been prepared by magnetron sputtering onto a substrate. The coating has a unique microstructure of nanometer spaced twins that are parallel to each other and to the substrate surface. For cases where the coating and substrate do not bind strongly, the coating can be peeled off to provide foil.

Zhang, Xinghang (Los Alamos, NM); Misra, Amit (Los Alamos, NM); Nastasi, Michael A. (Santa Fe, NM); Hoagland, Richard G. (Santa Fe, NM)

2006-07-18T23:59:59.000Z

217

Car Sharing for the Twin Cities ! HOURCAR helps make it possible to live car-  

E-Print Network [OSTI]

Car Sharing for the Twin Cities ! HOURCAR helps make it possible to live car- free or car-lite by filling in the "gaps" ! Car sharing reduces car ownership and saves its members thousands of dollars per year ! Car sharing "right-sizes" and makes transparent the costs of car usage #12;HOURCAR ! Transit

Minnesota, University of

218

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.

Angela M. Perez; Kirill Yu. Spasibko; Polina R. Sharapova; Olga V. Tikhonova; Gerd Leuchs; Maria V. Chekhova

2014-12-16T23:59:59.000Z

219

Surface and grain boundary scattering in nanometric Cu thin films: A quantitative analysis including twin boundaries  

SciTech Connect (OSTI)

The relative contributions of various defects to the measured resistivity in nanocrystalline Cu were investigated, including a quantitative account of twin-boundary scattering. It has been difficult to quantitatively assess the impact twin boundary scattering has on the classical size effect of electrical resistivity, due to limitations in characterizing twin boundaries in nanocrystalline Cu. In this study, crystal orientation maps of nanocrystalline Cu films were obtained via precession-assisted electron diffraction in the transmission electron microscope. These orientation images were used to characterize grain boundaries and to measure the average grain size of a microstructure, with and without considering twin boundaries. The results of these studies indicate that the contribution from grain-boundary scattering is the dominant factor (as compared to surface scattering) leading to enhanced resistivity. The resistivity data can be well-described by the combined Fuchs–Sondheimer surface scattering model and Mayadas–Shatzkes grain-boundary scattering model using Matthiessen's rule with a surface specularity coefficient of p?=?0.48 and a grain-boundary reflection coefficient of R?=?0.26.

Barmak, Katayun [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 and Department of Materials Science and Engineering and Materials Research Science and Engineering Center, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213 (United States); Darbal, Amith [Department of Materials Science and Engineering and Materials Research Science and Engineering Center, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213 (United States); Ganesh, Kameswaran J.; Ferreira, Paulo J. [Materials Science and Engineering, The University of Texas at Austin, 1 University Station, Austin, Texas 78712 (United States); Rickman, Jeffrey M. [Department of Materials Science and Engineering and Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015 (United States); Sun, Tik; Yao, Bo; Warren, Andrew P.; Coffey, Kevin R., E-mail: kb2612@columbia.edu [Department of Materials Science and Engineering, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816 (United States)

2014-11-01T23:59:59.000Z

220

The concrete theory of numbers : Problem of simplicity of Fermat number-twins  

E-Print Network [OSTI]

The problem of simplicity of Fermat number-twins $f_{n}^{\\pm}=2^{2^n}\\pm3$ is studied. The question for what $n$ numbers $f_{n}^{\\pm}$ are composite is investigated. The factor-identities for numbers of a kind $x^2 \\pm k $ are found.

Boris V. Tarasov

2007-07-06T23:59:59.000Z

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.


221

Stress Corrosion Crack Detection on HU-25 Guardian Aircraft  

SciTech Connect (OSTI)

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

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

1999-02-17T23:59:59.000Z

222

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

223

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...

224

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...

225

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...

226

E-Print Network 3.0 - aircraft icing nowcasting Sample Search...  

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...

227

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...

228

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

229

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

230

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

E-Print Network [OSTI]

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

Cullen, Timothy M

2011-01-01T23:59:59.000Z

231

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

E-Print Network [OSTI]

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

Dakhel, Pierre Max

2005-01-01T23:59:59.000Z

232

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

233

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...

234

E-Print Network 3.0 - aircraft noise prediction Sample Search...  

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

Source: Stanford University - Department of Aeronautics and Astronautics, Aircraft Aerodynamics and Design Group Collection: Engineering 4 MECHANICAL AND AEROSPACE ENGINEERING...

235

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

236

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.

237

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

E-Print Network [OSTI]

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

Ray, Asok

238

Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gromann1  

E-Print Network [OSTI]

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

Jüttler, Bert

239

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

E-Print Network [OSTI]

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

Brown, Patrick M.

2007-05-18T23:59:59.000Z

240

Operations Research Models and Aircraft Use for Fire Control in North America  

E-Print Network [OSTI]

- stant aircraft us~age was expanding. Unfortunately data on Canadian use of aircraft are limited means at its disposal l/"Imply" because tracing down and identifying the true magnitude of these costs account for the major portion of aircraft expenditures: reconnaissance, transportation and fire retardant

Greulich, Francis E.

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

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

242

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

E-Print Network [OSTI]

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

Kwatny, Harry G.

243

50 years of transonic aircraft design Antony Jameson, Kui Ou  

E-Print Network [OSTI]

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

Jameson, Antony

244

aircraft composite materials: Topics by E-print Network  

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

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

245

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

246

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network [OSTI]

--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

247

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.

248

aircraft materials: Topics by E-print Network  

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

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

249

aircraft interior materials: Topics by E-print Network  

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

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

250

Design trade studies and assessment for advanced quiet aircraft concepts  

E-Print Network [OSTI]

(cont.) designed for 4,000nm range, 25,000 to 35,000ft cruise altitude, Mach 0.8 at cruise, and 10,000 to 14,000ft takeoff field length. By identifying the main high-level design drivers of an aircraft design, the mission ...

Tan, David York Luen, 1979-

2005-01-01T23:59:59.000Z

251

advanced technology aircraft: Topics by E-print Network  

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

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

252

aircraft impact dynamics: Topics by E-print Network  

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

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

253

aircraft energy efficiency: Topics by E-print Network  

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

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

254

Predicting the Operational Effectiveness of Aircraft Survivability Equipment Suite  

E-Print Network [OSTI]

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

Noh, Sanguk

255

An Integrated Scenario-Based Approach for Robust Aircraft Routing ...  

E-Print Network [OSTI]

process, it unfortunately fails to capture the many dependencies between the various stages, ... of such a schedule, or indeed its operational robustness. Such an approach ... satisfying necessary maintenance requirements. Finally .... mean turn-around time is determined by the standard aircraft ground operating procedures.

2013-03-12T23:59:59.000Z

256

Direct measurement and reconstruction of nonclassical features of twin beams generated in spontaneous parametric down-conversion  

E-Print Network [OSTI]

Correlations in twin beams composed of many photon pairs are studied using an intensified CCD camera. Joint signal-idler photon-number distribution and quantum phase-space quasi-distributions determined from experimental data have nonclassical features.

Ondrej Haderka; Jan Perina Jr; Martin Hamar; Jan Perina

2004-05-20T23:59:59.000Z

257

Longitudinal Dynamics of Twin Electron Bunches in a High-energy Linac  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

The recent development of two-color x-ray free-electron lasers, as well as the successful demonstration of high-gradient witness bunch acceleration in a plasma, have generated strong interest in electron bunch trains, where two or more electron bunches are generated, accelerated and compressed in the same accelerating bucket. In this paper we give a detailed analysis of a twin-bunch technique in a high-energy linac. This method allows the generation of two electron bunches with high peak current and independent control of time delay and energy separation. We #12;find that the wake#12;fields in the accelerator structures play an important role in the twin-bunch compression, and through analysis show that they can be used to extend the available time delay range. Based on the theoretical model and simulations we propose several methods to achieve larger time delay.

Zhang, Zhen; Ding, Yuantao; Marinelli, Agostino; Huang, Zhirong

2015-03-01T23:59:59.000Z

258

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

259

Length sensing and control of a Michelson interferometer with Power Recycling and Twin Signal Recycling cavities  

E-Print Network [OSTI]

The techniques of power recycling and signal recycling have proven as key concepts to increase the sensitivity of large-scale gravitational wave detectors by independent resonant enhancement of light power and signal sidebands within the interferometer. Developing the latter concept further, twin signal recycling was proposed as an alternative to conventional detuned signal recycling. Twin signal recycling features the narrow-band sensitivity gain of conventional detuned signal recycling but furthermore facilitates the injection of squeezed states of light, increases the detector sensitivity over a wide frequency band and requires a less complex detection scheme for optimal signal readout. These benefits come at the expense of an additional recycling mirror, thus increasing the number of degrees of freedom in the interferometer which need to be controlled. In this article we describe the development of a length sensing and control scheme and its successful application to a tabletop-scale power recycled Michelson interferometer with twin signal recycling. We were able to lock the interferometer in all relevant longitudinal degrees of freedom, enabling the long-term stable operation of the experiment. We thus laid the foundation for further investigations of this interferometer topology to evaluate its viability for the application in gravitational wave detectors.

Christian Gräf; André Thüring; Henning Vahlbruch; Karsten Danzmann; Roman Schnabel

2012-11-29T23:59:59.000Z

260

Low gloss UV-cured coatings for aircraft  

DOE Patents [OSTI]

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

Bowman, Mark; Muschar, Harry

2014-12-09T23:59:59.000Z

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.


261

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

E-Print Network [OSTI]

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

Papalambros, Panos

262

Evaluation of three-way vs. single-cross hybrids of grain sorghum produced with twin-seeded and single-seeded parents  

E-Print Network [OSTI]

-sterile (A) lines; 2 homozygous single-seeded (tsts) and 1 homozygous twin-seeded (~sTs), their 3 non-restorer (B-line) counterparts, and 4 fertility restoring (R-lines); 2 homozygous single-seeded (tats) and 2 homozygous twin-seeded (TsTs) . These 30...-way hybrids when single- vs. twin-seeded and twin- vs ~ single-seeded, as groups, were contrasted ~ DFDICATICN Con Amor a Ko ty Pochito vii ACKNOWLEDGMEBTS I thank my major professor, Dr. Frederick R. Miller, for his advice and criticism during...

Perez, German Jose

1980-01-01T23:59:59.000Z

263

Design of a reconfigurable lateral flight control system for a C-135 aircraft  

E-Print Network [OSTI]

of MASTER OF SCIENCE December 1990 Major Subject: Mechanical Engineering DESIGN OF A RECONFIGURABLE LATERA. L FLIGHT CONTROL SYSTEM FOR A C ? 135 AIRCRAFT A Thesis COLIN ANDREW SWANEY Approved as to style and content by: S. Jayasuriya (Chair... and intelligence. These aircraft are equipped with specially designed radar and antennae. The C-135 aircraft has four engines and is similar in configuration to the commercial Boeing 707. A. Lateral Equations of Motion The lateral equations of motion...

Swaney, Colin Andrew

1990-01-01T23:59:59.000Z

264

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

265

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...

266

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

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

Technological, Operational, and Cost Perspectives Summary: of the high-bypass ratio engine. Initially developed for long- haul, wide-body aircraft, high-bypass ratio... ....

267

E-Print Network 3.0 - aircraft propulsion systems Sample Search...  

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

and Astronautics School of Engineering Summary: Aircraft Initiative, Robust Turbine Engine Design, Propulsion, Active Control of Aeromechanical Systems... an oxidizer, an...

268

E-Print Network 3.0 - aircraft flight control Sample Search Results  

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

"Flight Deck & Handling Qualities Standards... flight decks and to discuss handling quality requirements for modern transport aircraft. The meeting... was hosted by the Flight...

269

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

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

effects on aircraft performance. Although anti-icing devices such as de-icing boots and heating strips... help, ice ... Source: Valasek, John - Department of Aerospace...

270

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,...

271

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...

272

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...

273

E-Print Network 3.0 - aircraft wing structures Sample Search...  

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

structure of the oblique wing geometry... , Ardema, Roberts, Kroo,"Structural and Aerodynamic Considerations for an Oblique All-Wing Aircraft," AIAA... on aerodynamics, ......

274

E-Print Network 3.0 - aircraft aerodynamic derivatives Sample...  

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

aerodynamic derivatives Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft aerodynamic derivatives Page: << < 1 2 3 4 5 > >> 1 Morphing...

275

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

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

G0319014) we are developing robots to deploy conventional... and, later, new-concept NDI sensors for commercial aircraft ... Source: Siegel, Mel - Advanced Video Display Systems &...

276

E-Print Network 3.0 - aircraft noise Sample Search Results  

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

noise impacts for different aircraft types and different numbers of operations. b... Abatement Act (1973) Aviation Safety and Noise Abatement Act ... Source: George Mason...

277

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:...

278

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

Broader source: Energy.gov [DOE]

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

279

E-Print Network 3.0 - aircraft crash impact Sample Search Results  

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

faster convergence Summary: Calculates the amount of water impacting the aircraft Ice Solution Calculates the ice shape Optimized Mesh... of droplet collection efficiency....

280

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...

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

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...

282

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

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

fleet. Recent developments include... . This limitation is rooted in the way NDINDE inspections are performed: the aircraft has to be taken off line... for public release....

283

E-Print Network 3.0 - aircraft operating economics Sample Search...  

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

and aircraft are operated... , into operation, maintenance and eventually to disposal. Many ... Source: de Weck, Olivier L. - Department of Aeronautics and Astronautics,...

284

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

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

Learn about the critical factors involved Summary: , operation and maintenance of aging aircraft n Anyone involved in the field of aviation emergency response... .S. public...

285

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

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

; Engineering 100 Analyzing passenger travel disruptions in the National Air Transportation System Summary: these carriers have based on the large number of gates, aircraft,...

286

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...

287

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...

288

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...

289

E-Print Network 3.0 - aircraft mission capable Sample Search...  

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

that decisions are feasible with respect to aircraft availability... of planning and scheduling capabilities. By default, ... Source: Carnegie Mellon University, School of...

290

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 -...

291

E-Print Network 3.0 - aircraft parameters reducing Sample Search...  

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

Utilization 3 ModifyingFlightControl SystemstoLimitthe Summary: seems to push back. The control system ensures that the aircraft remains within safe flying parameters... portions...

292

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...

293

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...

294

E-Print Network 3.0 - aircraft parameter estimation Sample Search...  

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

trajectory prediction generates estimated times of arrival (ETA) for all aircraft to the scheduling control... prediction algorithms provide precise estimates of the future path...

295

E-Print Network 3.0 - aircraft crew dosimetry Sample Search Results  

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

maintenance, crew swapping... and profitability. Key words: Aircraft routing, crew scheduling, column generation, set partitioning, decision... the worry of hiring crews or...

296

E-Print Network 3.0 - aircraft accident victims Sample Search...  

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

The occasion... of accidents and disasters. The areas included were nuclear power plants, petrochemical plants, aircraft... accident as a case in point. Other systems that belonged...

297

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

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

engine research Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft engine research Page: << < 1 2 3 4 5 > >> 1 EngineeredMaterials 32 |...

298

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

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

Powered by Explorit Topic List Advanced Search Sample search results for: aircraft engine noise Page: << < 1 2 3 4 5 > >> 1 HYBRID LAMINAR FLOW TECHNOLOGY Partner: EADS Airbus...

299

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

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

Powered by Explorit Topic List Advanced Search Sample search results for: aircraft engine design Page: << < 1 2 3 4 5 > >> 1 Eighth USAEurope Air Traffic Management Research...

300

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

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

engine components Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft engine components Page: << < 1 2 3 4 5 > >> 1 EngineeredMaterials 32 |...

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

E-Print Network 3.0 - aircraft fault detection Sample Search...  

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

the next 3 years, we cannot use... aircrafts to detect faults on our new ones. Fuzzy logic converts expert knowledge (usually, rules... ), expressed in natural language, into...

302

E-Print Network 3.0 - aircraft maintenance Sample Search Results  

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

for the U.S. Army Logistics Air Fleet Summary: capacity, airfield landing capability, maximum flight range of aircraft, maintenance requirement... mandated maintenance...

303

E-Print Network 3.0 - aircraft fuels Sample Search Results  

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

Collection: Biology and Medicine 2 Flying on Hydrogen GeorgiaTech researchers use fuel cells to power unmanned aerial vehicle. Summary: -powered unmanned aircraft believed...

304

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

305

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

306

Radiant Energy Power Source for Jet Aircraft. Final performance report  

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

307

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 Battelle’s 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

308

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

309

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

2009-02-05T23:59:59.000Z

310

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

311

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

312

EA-344 Twin Cities Power-Canada, LLC | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct,Final9: DraftPlant, Amarillo, Texas |2:12-C7-B Emera44 Twin

313

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

Office of Legacy Management (LM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou areDowntown Site - MOTracerlab Inc -Twin Cities

314

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

315

A Case Study on Reactive Protocols for Aircraft Electric Power Distribution  

E-Print Network [OSTI]

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

Xu, Huan

316

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

E-Print Network [OSTI]

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

Murray, Richard M.

317

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

318

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

319

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.

320

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

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

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

322

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

E-Print Network [OSTI]

Aircraft Gas Turbine, define the thermodynamic cycle implemented in the model, define the key engineDevelopment and Implementation of Interactive/Visual Software for Simple Aircraft Gas Turbine of software to analyze and design gas turbine systems has been an important part of this course since 1988

Ghajar, Afshin J.

323

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.

324

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

325

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

1971-01-01T23:59:59.000Z

326

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

E-Print Network [OSTI]

and model-based information. As aircraft gas turbine engines consist of multiple interconnected compo- nents319 Fault detection and isolation in aircraft gas turbine engines. Part 2: validation of fault detection and isolation (FDI) in aircraft gas turbine engines. The FDI algorithms are built upon

Ray, Asok

327

Final Report on NPS/CIRPAS support of DOE Classic Experiment  

SciTech Connect (OSTI)

The Department of Energy conducted the Cloud-Land Surface Interaction Campaign (CLASIC) in Poncha City Oklahoma, in June 2007. The purpose of the experiment was to study the influence of different surface conditions on properties of small cumulus clouds. The Oklahoma site provided climatologically arid surface in the western part of the state, and lush green conditions in the eastern part. The summer of 2007, however, was exceptionally wet, with flooded fields and rivers flowing over their banks. This had seriously adverse effect on the experiment. CIRPAS participated in this with its instrumented Twin Otter aircraft, flight crew and scientist. The CIRPAS instruments measured temperature, dewpoint temperature, pressure, winds, aerosol particle concentrations, aerosol size distribution, cloud droplet concentration, cloud droplet size spectra, total scatter coefficients and absorption coefficients at three different wavelengths. Additionally, CIRPAS provided measurements of aircraft location, velocity and attitude. CIRPAS reduced all the data to engineering units, quality assured the data, and submitted a coherent data set to the project’s archive. The Twin Otter flew 15 sorties from the airport in Ponca City, and characterized meteorological, aerosol and cloud conditions as well as the temperature of the underlying surface in a wide variety of conditions. Conditions ranged from deep convection and thunderstorms, to totally clear sky and stable atmosphere. Some flights were coordinated with other aircraft, such as the DOE’s G-1, which was in Ponca City simultaneously doing the CHAPS mission, the NASA King Air, which used lidar to characterize underlying aerosol and clouds, and a helicopter from Duke University, which was characterizing turbulence. Other flights were coordinated with satellite overpasses, ground-based observation sites. The field campaign took place during the month of June, 2007, and all CIRPAS data had been delivered by October that same year.

Haflidi H Jonsson

2011-03-07T23:59:59.000Z

328

Submitted to Composites A: Applied Science and Manufacturing Graded Polymer Composites Using Twin Screw Extrusion: A Combinatorial  

E-Print Network [OSTI]

Twin Screw Extrusion: A Combinatorial Approach to Developing New Energetic Materials Frederick M The development of new energetic materials is a time-consuming, laborious, and sometimes dangerous process. Batch for developing new energetic materials. Graded composite energetic materials with 79 to 87% solids loading

Maryland at College Park, University of

329

Technical evaluation of Russian aircraft stealth coating and structural materials  

SciTech Connect (OSTI)

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

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

1996-10-01T23:59:59.000Z

330

A Comprehensive Program for Measurement of Military Aircraft Emissions  

SciTech Connect (OSTI)

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

Cheng, Mengdawn [ORNL

2009-11-01T23:59:59.000Z

331

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

SciTech Connect (OSTI)

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

Roach, Dennis Patrick; Rackow, Kirk A.

2007-07-01T23:59:59.000Z

332

Chains of quasiclassical information for bipartite correlations and the role of twin observables  

SciTech Connect (OSTI)

Having the quantum correlations in a general mixed or pure bipartite state in mind, the part of information accessible by simultaneous measurement on both subsystems is shown never to exceed the part accessible by measurement on one subsystem, which, in turn is proved not to exceed the von Neumann mutual information. A particular pair of (opposite-subsystem) observables is shown to be responsible both for the amount of quasiclassical correlations and for that of the purely quantum entanglement in the pure-state case: the former via simultaneous subsystem measurements, and the latter through the entropy of coherence or of incompatibility, which is defined for the general case. The observables at issue are so-called twin observables. A general definition of the latter is given in terms of their detailed properties.

Herbut, Fedor [Faculty of Physics, University of Belgrade, P.O. Box 368, Belgrade 11001, Serbia (Serbia and Montenegro); Serbian Academy of Sciences and Arts, Knez Mihajlova 35, 11000 Belgrade (Serbia and Montenegro)

2002-11-01T23:59:59.000Z

333

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

334

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

335

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

SciTech Connect (OSTI)

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

NONE

1999-01-01T23:59:59.000Z

336

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

1973-01-01T23:59:59.000Z

337

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

338

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

339

Transitions of Dislocation Glide to Twinning and Shear Transformation in Shock-Deformed Tantalum  

SciTech Connect (OSTI)

Recent TEM studies of deformation substructures developed in tantalum and tantalum-tungsten alloys shock-deformed at a peak pressure {approx}45 GPa have revealed the occurrence of shock-induced phase transformation [i.e., {alpha} (bcc) {yields} {omega} (hexagonal) transition] in addition to shock-induced deformation twinning. The volume fraction of twin and {omega} domains increases with increasing content of tungsten. A controversy arises since tantalum exhibits no clear equilibrium solid-state phase transformation under hydrostatic pressures up to 174 GPa. It is known that phase stability of a material system under different temperatures and pressures is determined by system free energy. That is, a structural phase that has the lowest free energy will be stable. For pressure-induced phase transformation under hydrostatic-pressure conditions, tantalum may undergo phase transition when the free energy of a competing phase {omega} becomes smaller than that of the parent phase {alpha} above a critical pressure (P{sub eq}), i.e., the equilibrium {alpha} {yields} {omega} transition occurs when the pressure increases above P{sub eq}. However, it is also known that material shocked under dynamic pressure can lead to a considerable increase in temperature, and the higher the applied pressure the higher the overheat temperature. This means a higher pressure is required to achieve an equivalent volume (or density) in dynamic-pressure conditions than in hydrostatic-pressure conditions. Accordingly, P{sub eq} for {alpha} {yields} {omega} transition is anticipated to increase under dynamic-pressure conditions as a result of the temperature effect. Although no clear equilibrium transition pressure under hydrostatic-pressure conditions is reported for tantalum, it is reasonable to assume that Peq under dynamic-pressure conditions will be considerably higher than that under hydrostatic-pressure conditions if there is a pressure-induced {alpha} {yields} {omega} transition in tantalum. The observation of {alpha} {yields} {omega} transition in shock-compressed tantalum and tantalum-tungsten alloys at {approx}45 GPa in fact reveals the occurrence of a non-equilibrium phase transformation at such a low pressure. We therefore postulated that the equation of state (EOS) based on static thermodynamics, which asserts that the system free energy (G) is a function of volume (V), pressure (P), and temperature (T), i.e., G = F(V, P, T) is insufficient to rationalize the system free energy under dynamic-pressure conditions. Since shear deformation was found to play a crucial role in shock-induced deformation twins and {omega} phase, the density and arrangement of dislocations, which can alter and increase the system free energy, should also be taken into account to rationalize the non-equilibrium phase transformation in shocked tantalum. Typical arrangements of high-density dislocations formed in pure tantalum shocked at {approx}45 GPa are shown in Figs. 1a and 1b. Figure 1a reveals a cellular dislocation structure but no twins or {omega} phase-domains were observed in this region. The formation of low-energy type cellular dislocation structures indicates the occurrence of dynamic-recovery reactions to reduce dislocation density in this region. Figure 1b shows an evenly distributed dislocation structure with a local dislocation density ({rho}) as high as {approx}5 x 10{sup 12} cm{sup -2} according to {rho} {approx} 1/l{sup 2}, where l ({approx}4.5 nm) is the spacing between two dislocations. Here shock-induced twin plates and {omega} phase-domains can be readily seen. These observations provide us a clue that dislocation arrangement and density population, which can alter system free energy through the changes of dislocation self-energy (E{sub s}) and dislocation interaction energy (E{sub ij}), are relevant to the occurrence of shock-induced twinning and phase transformation in tantalum. The objective of this paper is to report new results obtained from pure tantalum and tantalum tungsten alloys shocked at {approx}30 GPa in order to clarify the corr

Hsiung, L L; Campbell, G H; McNaney, J M

2009-10-19T23:59:59.000Z

340

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...

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

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

342

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

343

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

E-Print Network [OSTI]

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

Randall, Brian Edward

1996-01-01T23:59:59.000Z

344

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

345

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

E-Print Network [OSTI]

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

Patriksson, Michael

346

Microphysical modeling of ultrane hydrocarbon-containing aerosols in aircraft emissions  

E-Print Network [OSTI]

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

Jun, Mina

2011-01-01T23:59:59.000Z

347

E-Print Network 3.0 - aircraft industry Sample Search Results  

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

OF THE CONTROLLED FLIGHT INTO TERRAIN Summary: 4-D.1 3 Industry task force. Appendix 4-D, section 4-D.1.1 12;Revision 14.0 4 1. AIRCRAFT... ......

348

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

349

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

E-Print Network [OSTI]

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

Miller, Bruno

2004-01-01T23:59:59.000Z

350

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

E-Print Network [OSTI]

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

Faulkner, Henry B.

1976-01-01T23:59:59.000Z

351

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

352

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

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

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

353

E-Print Network 3.0 - aircraft lift estonia Sample Search Results  

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

of topics of interest to the Summary: will be served. May 6th, 2010 Edgar Cuji "Aerodynamic Analysis and Aircraft Dynamics of Two Linked UAVs Flying... its range and...

354

Intelligent executive guidance agent for general aviation aircraft under free flight  

E-Print Network [OSTI]

free flight path guidance, as the aircraft flies in and out of dangerous regions. Results of test cases presented in the thesis demonstrate that the approach and algorithm can successfully resolve combined weather and traffic conflicts in real...

Rong, Jie

2002-01-01T23:59:59.000Z

355

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

E-Print Network [OSTI]

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

Horrell, Alexander C. (Alexander Chapman)

2012-01-01T23:59:59.000Z

356

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

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

Science 7 Chris Frink (crf46) Sikorsky Aircraft Corporation Mechanical & Aerospace Engineering Co-op Term 2 (Summer '10) Summary: 12;12;12;12;12;12;12;12;12;Chris Frink...

357

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

358

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

E-Print Network [OSTI]

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

Wiseman, Yair

359

A physics-based emissions model for aircraft gas turbine combustors  

E-Print Network [OSTI]

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

Allaire, Douglas L

2006-01-01T23:59:59.000Z

360

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

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

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

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

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

362

Design of a model propulsor for a boundary layer ingesting aircraft  

E-Print Network [OSTI]

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

Grasch, Adam D. (Adam Davis)

2013-01-01T23:59:59.000Z

363

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

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

U.S. EPA Clean Air Act ICAO CAEP FAA Aircraft Noise... trails radiative forcing emissions trading alternative fuels The student will be able to perform... the following: a....

364

E-Print Network 3.0 - aircraft noise exposure Sample Search Results  

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

<< < 1 2 3 4 5 > >> 41 MARAE. WEISENBERGER,PAULR. KRAUSMAN,MARK C. WALLACE, DONALDW. DE YOUNG,ANDo. EUGENEMAUGHAN Summary: became habituated to aircraft noises after prolonged...

365

E-Print Network 3.0 - anti-aircraft defence Sample Search Results  

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

11 Proliferation of small arms and challenges to post-conflict Summary: machine-guns, hand held, under-barrel and mounted grenade launchers, portable anti-aircraft guns,...

366

Design and acoustic shielding prediction of hybrid wing-body aircraft  

E-Print Network [OSTI]

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

Ng, Leo Wai-Tsun

2009-01-01T23:59:59.000Z

367

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

368

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

369

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...

370

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

E-Print Network [OSTI]

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

Ruiz, Jose Pedro, 1980-

2004-01-01T23:59:59.000Z

371

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

372

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

373

Study of progesterone for the prevention of preterm birth in twins (STOPPIT): findings from a trial-based cost-effectiveness analysis   

E-Print Network [OSTI]

OBJECTIVES: Preterm birth contributes to a range of healthcare problems amongst infants surmounting to sizeable healthcare costs. Twin pregnancies are at particular risk of preterm birth. The objective of this study was ...

Eddama, O.; Petrou, S.; Regier, D.; Norrie, J.; MacLennan, G.; Mackenzie, F.; Norman, J. E.

374

which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Dicephalus parapagus conjoined twins discordant for anencephaly: a case report  

E-Print Network [OSTI]

This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Dicephalus parapagus conjoined twins discordant for anencephaly: a case report

Usang E Usang; Babatunde J Olasode; Ayi E Archibong; Jacob J Udo; Usang E Usang; Babatunde J Olasode; Ayi E Archibong; Jacob J Udo; U Eduwem

2009-01-01T23:59:59.000Z

375

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

376

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

377

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

E-Print Network [OSTI]

. Fueling Policy for Aircraft 1 IX. Fueling Policy for Aircraft 2 X. Optimum Fueling Policy for Both Aircrai'ts XI. Output Results for the Proposed Aviation Example . XII. Solution of the MFAP Example Problem Page 20 30 34 37 40 41 41 42 85... 103 LIST OF FIGURES Figure 1. Flowchart of the Proposed Methodology . 2. Network Representation of the ARP Model 3. Sample Network for Fuel Allocation Problem . 4. Netvvork Representation of the Aviation Example . 5. First TSP-Based Routing...

Kabbani, Nader Mahmoud

1988-01-01T23:59:59.000Z

378

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

1978-01-01T23:59:59.000Z

379

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

380

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

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

Effect of geometrical constraint condition on the formation of nanoscale twins in the Ni-based metallic glass composite  

SciTech Connect (OSTI)

We investigated the effect of geometrically constrained stress-strain conditions on the formation of nanotwins in alpha-brass phase reinforced Ni59Zr20Ti16Si2Sn3 metallic glass (MG) matrix deformed under macroscopic uniaxial compression. The specific geometrically constrained conditions in the samples lead to a deviation from a simple uniaxial state to a multi-axial stress state, for which nanocrystallization in the MG matrix together with nanoscale twinning of the brass reinforcement is observed in localized regions during plastic flow. The nanocrystals in the MG matrix and the appearance of the twinned structure in the reinforcements indicate that the strain energy is highly confined and the local stress reaches a very high level upon yielding. Both the effective distribution of reinforcements on the strain enhancement of composite and the effects of the complicated stress states on the development of nanotwins in the second-phase brass particles are discussed.

Lee, M.H.; Kim, B.S.; Kim, D.H.; Ott, R.T.; Sansoz, F.; Eckert, J.

2014-04-25T23:59:59.000Z

382

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

SciTech Connect (OSTI)

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

NONE

1999-01-01T23:59:59.000Z

383

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

E-Print Network [OSTI]

the ensuing motion of the aircraft diminishes after an initial disturbance. If an aircraft does not posses static stability, a disturbance from the equilibrium, or trim condition will grow exponentially. Dynamic instability implies either an aperiodic... in order to de termine the performance capabilities of an aircraft. Control authority refers to the de sired output as compared to the required input. The purpose of this research was to design, fabricate, test, and integrate a flight test system which...

Oehl, David Christopher

1995-01-01T23:59:59.000Z

384

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

SciTech Connect (OSTI)

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

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

2014-02-18T23:59:59.000Z

385

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

2005-03-09T23:59:59.000Z

386

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

387

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

SciTech Connect (OSTI)

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

Maddalena, Randy I.; McKone, Thomas E.

2008-10-01T23:59:59.000Z

388

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

389

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.

390

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

391

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

E-Print Network [OSTI]

-based. The preventative alternative involves the transmission of maintenance data to maintenance personnel whenAirline Fleet Maintenance: Trade-off Analysis of Alternate Aircraft Maintenance Approaches Mike Dupuy, Dan Wesely, Cody Jenkins Abstract ­ Airline maintenance is a significant contributor

392

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

393

Distributed Formation Control of Multiple Aircraft Using Constraint Yunfei Zou, Prabhakar R. Pagilla  

E-Print Network [OSTI]

conducted to verify the proposed approach. I. INTRODUCTION The problem of autonomous formation flight geometries leads to many advantages and applications. For example, energy saving from vortex forces and fuel deployment of troops and vehicles. Moreover, many aircraft involved in a mission can be better managed

Pagilla, Prabhakar R.

394

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

E-Print Network [OSTI]

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

Fischer, Shiloh Douglas

1996-01-01T23:59:59.000Z

395

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

396

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

E-Print Network [OSTI]

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

Ladkin, Peter B.

397

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

E-Print Network [OSTI]

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

Daniel, Rosenfeld

398

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

E-Print Network [OSTI]

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

California at Berkeley, University of

399

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

E-Print Network [OSTI]

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

Palmer, Paul

400

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

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

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

402

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

E-Print Network [OSTI]

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

Dimarogonas, Dimos

403

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

E-Print Network [OSTI]

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

Texas at Arlington, University of

404

Nonlinear Model Predictive Control of an Aircraft Gas Turbine Engine Brent. J. Brunell  

E-Print Network [OSTI]

Nonlinear Model Predictive Control of an Aircraft Gas Turbine Engine Brent. J. Brunell , Robert R the potential to achieve better performance than the production controller. 1 Introduction Gas turbines can turbine model considered is a low bypass, two rotor, turbojet with a variable exhaust area typical

Bitmead, Bob

405

Asian emissions of CO and NOx: Constraints from aircraft and Chinese station data  

E-Print Network [OSTI]

and chemistry; KEYWORDS: inversion, Asian emissions, carbon monoxide, nitrogen oxides Citation: Wang, Y. X., MAsian emissions of CO and NOx: Constraints from aircraft and Chinese station data Yuxuan X. Wang to constrain estimates of Asian emissions of CO and NOx. A priori emissions are based on a detailed bottom

Palmer, Paul

406

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

407

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

408

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

E-Print Network [OSTI]

-frequency and wavelength- tunable radiation from the ultraviolet to the far infrared region of the spectrum. Typical optical coefficients, (iii) the crystal must resist damage at the high power densities required405 NONLINEAR OPTICAL EFFECTS IN ROTATIONALLY-TWINNED CRYSTALS: AN EVALUATION OF CdTe, ZnTe AND Zn

Boyer, Edmond

409

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

410

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

E-Print Network [OSTI]

Aircraft leasing represents a significant portion of the financial statements of airline firms. Accounting treatment of lease transactions is becoming more complicated as firms attempt to achieve off-balance-sheet outcomes ...

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

2007-01-01T23:59:59.000Z

411

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.

412

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

SciTech Connect (OSTI)

The authors have developed a new piston engine offering unprecedented efficiency for a new generation of miniature robotic aircraft. Following Phase 1 preliminary design in 1996--97, they have gone forward in Phase 2 to complete detail design, and are nearing completion of a first batch of ten engines. A small-engine dynamometer facility has been built in preparation for the test program. Provisions have been included for supercharging, which will allow operation at ceilings in the 10,000 m range. Component tests and detailed analysis indicate that the engine will achieve brake-specific fuel consumption well below 300 gm/kWh at power levels of several hundred watts. This level of performance opens the door to development of tabletop-sized aircraft having transpacific range and multi-day endurance, which will offer extraordinary new capabilities for meteorology, geomagnetic, and a variety of applications in environmental monitoring and military operations.

Tad McGeer

1999-09-29T23:59:59.000Z

413

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

414

An investigation of the effect of rudder deflection on aircraft motions and tail loads during rolling maneuvers  

E-Print Network [OSTI]

of Texas kn Partial Fulfillment of the Requirements for the Degree of Master of Science Nay 1959 Dbpartment of Aeronautical Engineering Ihjor Subject: Aeronautical Engineering PN INVESTIGATION OF , THE EFFECT OF RUDDER DEFLECTION ON AIRCRAFT MOTIONS...LLBRARY A & M COLLEGE OF TEXAS AN INVESTIGA'TION OF THE EFFECT OF RUDDER DEFLECTION ON AIRCRAFT MOTIONS AND TAIL LOADS DURING ROLLING MANEUVERS John R. Sell A thesis emitted to the Graduate School of 6e Agricultural and Mechanical College...

Sell, John Richard

1959-01-01T23:59:59.000Z

415

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

416

Theoretical full power correction factors as related to changes in ambient temperature, pressure and absolute humidity for aircraft turbine engines  

E-Print Network [OSTI]

IN AMBIENT TEMPERATURE, PRESSURF. AND ABSOLUTE HUMIDITY FOR AIRCRAFT TURBINE ENGINES (August 1969) Michael Antoun Raphael B. S. (Mechanical Engineering) Texas A&M University Directed by: Professor Stanley H, Lowy ABSTRACT Power losses in aircraft gas... rated at standard atmospheric conditions (i. e, ambient temperature 69 F 3'Fend atmospheric pressure 29. 92 in. Hg. dry) . Obviously this same turbine will not be exposed to such standard conditions; therefore we have a change in power directly...

Raphael, Michel Antoun

1969-01-01T23:59:59.000Z

417

Aircraft Observations of Sub-cloud Aerosol and Convective Cloud Physical Properties  

E-Print Network [OSTI]

of Department, Kenneth Bowman December 2009 Major Subject: Atmospheric Sciences iii iii ABSTRACT Aircraft Observations of Sub-Cloud Aerosol and Convective Cloud Physical Properties. (December 2009) Duncan Axisa, B.Ed., University of Malta; B... but for vertical velocity (ms-1). Negative values are updraft and positive values are downdraft ........................................... 30 18 Cloud droplet size distribution (dN/dlogD, cm-3) for 1Hz cloud penetration data...

Axisa, Duncan

2011-02-22T23:59:59.000Z

418

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

E-Print Network [OSTI]

for weight, lift-to-drag ratio and engine efficiency obtained from an extensive survey of the open literature. Also included was a consideration of hydrogen as an alternative, zero-CO2, fuel. The use of hydrogen as a transportation fuel is challenging... turbofan engine BWB Blended wing-body aircraft configuration CAEP Committee on Aviation Environmental Protection CO2 Carbon dioxide CRC Conceptual Research Corporation (NASA N+3 contractor) EIS Entry into service EPNdB Effective perceived noise level...

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

2014-03-27T23:59:59.000Z

419

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

420

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

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

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

SciTech Connect (OSTI)

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

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

2011-06-23T23:59:59.000Z

422

Sonic IR crack detection of aircraft turbine engine blades with multi-frequency ultrasound excitations  

SciTech Connect (OSTI)

Effectively and accurately detecting cracks or defects in critical engine components, such as turbine engine blades, is very important for aircraft safety. Sonic Infrared (IR) Imaging is such a technology with great potential for these applications. This technology combines ultrasound excitation and IR imaging to identify cracks and flaws in targets. In general, failure of engine components, such as blades, begins with tiny cracks. Since the attenuation of the ultrasound wave propagation in turbine engine blades is small, the efficiency of crack detection in turbine engine blades can be quite high. The authors at Wayne State University have been developing the technology as a reliable tool for the future field use in aircraft engines and engine parts. One part of the development is to use finite element modeling to assist our understanding of effects of different parameters on crack heating while experimentally hard to achieve. The development has been focused with single frequency ultrasound excitation and some results have been presented in a previous conference. We are currently working on multi-frequency excitation models. The study will provide results and insights of the efficiency of different frequency excitation sources to foster the development of the technology for crack detection in aircraft engine components.

Zhang, Ding; Han, Xiaoyan [Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202 (United States); Newaz, Golam [Department of Mechanical Engineering, Wayne State University, Detroit, MI 48202 (United States)

2014-02-18T23:59:59.000Z

423

Applying technology strategy with enterprise architecting : a case study in transformation planning for integrating Unmanned Aircraft Systems into the National Airspace  

E-Print Network [OSTI]

The research presented in this thesis combines Enterprise Architecture and Technology Strategy for analyzing, evaluating, and recommending appropriate solutions for integrating Unmanned Aircraft Systems (UAS) into the ...

Richardson, Kristina L. (Kristina Lynn)

2009-01-01T23:59:59.000Z

424

bib-otter | netl.doe.gov  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched FerromagnetismWaste andAnniversary,Effects of InhomogeneousBig Bend Power

425

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

426

DOD-DOE Aircraft Petroleum Use Reduction Workshop | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: Top FiveDepartmentfor06/2015) CIO, DCIO, COO, CTO, CA,and the5-16DOD-DOE Aircraft

427

The Ring Nebula Around the Blue Supergiant SBW1: Pre-Explosion Snapshot of a SN 1987A Twin  

E-Print Network [OSTI]

SBW1 is a B supergiant surrounded by a ring nebula that is a nearby twin of SN 1987A. We present images and spectra of SBW1 obtained with HST, Spitzer, and Gemini South. HST images of SBW1 do not exhibit long Rayleigh-Taylor fingers, which are presumed to cause the hotspots in the SN1987A ring, but instead show a geometrically thin clumpy ring. The radial mass distribution and size scales of inhomogeneities in SBW1's ring closely resemble those in the SN1987A ring, but the more complete disk expected to reside at the base of the RT fingers is absent. This structure may explain why portions of the SN1987A ring between the hotspots have not yet brightened after more than 15 years. The model we suggest does not require a fast wind colliding with a previous red supergiant wind. More surprisingly, images of SBW1 also reveal diffuse emission filling the interior of the ring in H-alpha and thermal-IR emission; 190K dust dominates the 8-20 micron luminosity (but contains only 1e-5Msun). Cooler (85K dust resides in th...

Smith, Nathan; Bally, John; Ginsburg, Adam; Filippenko, Alexei V

2012-01-01T23:59:59.000Z

428

Precision guided parachute LDRD final report  

SciTech Connect (OSTI)

This report summarizes the results of the Precision Guided Parachute LDRD, a two year program at Sandia National Laboratories which developed a Global Positioning System (GPS) guided parachute capable of autonomous flight and landings. A detailed computer model of a gliding parachute was developed for software only simulations. A hardware in-the-loop simulator was developed and used for flight package system integration and design validation. Initial parachute drop tests were conducted at Sandia`s Coyote Canyon Cable Facility, followed by a series of airdrops using Ross Aircraft`s Twin Otter at the Burris Ranch Drop Zone. Final flights demonstrated in-flight wind estimation and the capability to fly a commanded heading. In the past, the cost and logistical complexity of an initial navigation system ruled out actively guiding a parachute. The advent of the low-cost, light-weight Global Positioning System (GPS) has eliminated this barrier. By using GPS position and velocity measurements, a guided parachute can autonomously steer itself to a targeted point on the ground through the use of control drums attached to the control lanyards of the parachute. By actively correcting for drop point errors and wind drift, the guidance accuracy of this system should be on the order of GPS position errors. This would be a significant improvement over unguided airdrops which may have errors of a mile or more.

Gilkey, J.C. [Sandia National Labs., Albuquerque, NM (United States). Aided Navigation and Remote Sensing Dept.

1996-07-01T23:59:59.000Z

429

The 2011 Cessna Aircraft Company/Raytheon Missile Systems Design/Build/Fly Competition Flyoff was held at TIMPA Field in Tucson, AZ on the weekend of April 15-17, 2011. This was the 15th  

E-Print Network [OSTI]

The 2011 Cessna Aircraft Company/Raytheon Missile Systems Design/Build/Fly Competition Flyoff Cessna Aircraft, Raytheon Missile Systems, and the AIAA sponsoring technical committees: Applied also go to the corporate Sponsors: Raytheon Missile Systems and Cessna Aircraft Company, and also

Southern California, University of

430

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; François-Xavier Schmider; Alberto Adriani; Giuseppe Piccioni

2014-09-11T23:59:59.000Z

431

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

432

Shortle, J., Y. Zhang, J. Wang. 2010. Statistical characteristics of aircraft arrival tracks. To appear in Transportation Research Record. 1  

E-Print Network [OSTI]

or improving the existing level of safety. Several researchers have measured the statistical distributions of aircraft separations on arrival, both in terms of distance and time. References (3, 4, 5) measured using radar data (6, 7, 8) and multilateration data (9, 10, 11). Reference (12) uses multilateration

433

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

434

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

435

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

436

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 of 0.33 0.04 for the total atmosphere (surface to top). The absorptance of solar radiation estimated more solar radiation than is predicted by theory [e.g., Stephens and Tsay 1990]. Recently, and nearly

Dong, Xiquan

437

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

SciTech Connect (OSTI)

This report examines the potential for Solid-Oxide Fuel Cells (SOFC) to provide electrical generation on-board commercial aircraft. Unlike a turbine-based auxiliary power unit (APU) a solid oxide fuel cell power unit (SOFCPU) would be more efficient than using the main engine generators to generate electricity and would operate continuously during flight. The focus of this study is on more-electric aircraft which minimize bleed air extraction from the engines and instead use electrical power obtained from generators driven by the main engines to satisfy all major loads. The increased electrical generation increases the potential fuel savings obtainable through more efficient electrical generation using a SOFCPU. However, the weight added to the aircraft by the SOFCPU impacts the main engine fuel consumption which reduces the potential fuel savings. To investigate these relationships the Boeing 787­8 was used as a case study. The potential performance of the SOFCPU was determined by coupling flowsheet modeling using ChemCAD software with a stack performance algorithm. For a given stack operating condition (cell voltage, anode utilization, stack pressure, target cell exit temperature), ChemCAD software was used to determine the cathode air rate to provide stack thermal balance, the heat exchanger duties, the gross power output for a given fuel rate, the parasitic power for the anode recycle blower and net power obtained from (or required by) the compressor/expander. The SOFC is based on the Gen4 Delphi planar SOFC with assumed modifications to tailor it to this application. The size of the stack needed to satisfy the specified condition was assessed using an empirically-based algorithm. The algorithm predicts stack power density based on the pressure, inlet temperature, cell voltage and anode and cathode inlet flows and compositions. The algorithm was developed by enhancing a model for a well-established material set operating at atmospheric pressure to reflect the effect of elevated pressure and to represent the expected enhancement obtained using a promising cell material set which has been tested in button cells but not yet used to produce full-scale stacks. The predictions for the effect of pressure on stack performance were based on literature. As part of this study, additional data were obtained on button cells at elevated pressure to confirm the validity of the predictions. The impact of adding weight to the 787-8 fuel consumption was determined as a function of flight distance using a PianoX model. A conceptual design for a SOFC power system for the Boeing 787 is developed and the weight estimated. The results indicate that the power density of the stacks must increase by at least a factor of 2 to begin saving fuel on the 787 aircraft. However, the conceptual design of the power system may still be useful for other applications which are less weight sensitive.

Whyatt, Greg A.; Chick, Lawrence A.

2012-04-01T23:59:59.000Z

438

Standard Test Method for Stress-Corrosion of Titanium Alloys by Aircraft Engine Cleaning Materials  

E-Print Network [OSTI]

1.1 This test method establishes a test procedure for determining the propensity of aircraft turbine engine cleaning and maintenance materials for causing stress corrosion cracking of titanium alloy parts. 1.2 The evaluation is conducted on representative titanium alloys by determining the effect of contact with cleaning and maintenance materials on tendency of prestressed titanium alloys to crack when subsequently heated to elevated temperatures. 1.3 Test conditions are based upon manufacturer's maximum recommended operating solution concentration. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see and .

American Society for Testing and Materials. Philadelphia

2006-01-01T23:59:59.000Z

439

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

440

Discovery of a nearby twin of SN1987A's nebula around the luminous blue variable HD168625: Was Sk--69 202 an LBV?  

E-Print Network [OSTI]

Spitzer images of the luminous blue variable (LBV) candidate HD168625 reveal the existence of a bipolar nebula several times larger than its previously-known equatorial dust torus. The outer nebula of HD168625 has a full extent of about 80 arcsec or 0.85 pc, and one of the lobes has a well-defined polar ring. The nebula is a near twin of the triple-ring system around SN1987A. Because of these polar rings, and accounting for stellar/progenitor luminosity, HD168625 is an even closer twin of SN1987A than the B supergiant Sher 25 in NGC3603. HD168625's nebula was probably ejected during a giant LBV eruption and not during a red supergiant phase, so its similarity to the nebula around SN1987A may open new possibilities for the creation of SN1987A's rings. Namely, the hypothesis that Sk-69 202 suffered an LBV-like eruption would avert the complete surrender of single star models for its bipolar nebula by offering an alternative to an unlikely binary merger scenario. It also hints that LBVs are the likely progenitors of some type II supernovae, and that HD168625's nebula is a good example of a pre-explosion environment.

Nathan Smith

2006-11-16T23:59:59.000Z

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

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

442

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

443

Civil aircraft accident Report on the Accident to Boeing 707-465 G-Arwe at Heathrow Airport, London on 8th April 1968   

E-Print Network [OSTI]

A3.C.A.P. 324 Civil aircraft accident Report on the Accident to Boeing 707-465 G-Arwe at Heathrow Airport, London on 8th April 1968...

Anonymous

1969-01-01T23:59:59.000Z

444

Report of the Court investigation of accident on the Tudor IV. Aircraft “Star Tiger” G-AHNP on the 30th January, 1948, held under Air Navigation   

E-Print Network [OSTI]

MINISTRY OF CIVIL AVIATION REPORT of the Court investigation of the accident to the Tudor IV. Aircraft "Star Tiger" G-AHNP on the 30th January, 1948, held under the Air Navigation (Investigation of Accidents) Regulations, 1922

Anonymous

445

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

446

Design and implementation of a Synthetic Aperture Radar for Open Skies (SAROS) aboard a C-135 aircraft  

SciTech Connect (OSTI)

NATO and former Warsaw Pact nations have agreed to allow overflights of their countries in the interest of easing world tension. The United States has decided to implement two C-135 aircraft with a Synthetic Aperture Radar (SAR) that has a 3-meter resolution. This work is being sponsored by the Defense Nuclear Agency (DNA) and will be operational in Fall 1995. Since the SAR equipment must be exportable to foreign nations, a 20-year-old UPD-8 analog SAR system was selected as the front-end and refurbished for this application by Loral Defense Systems. Data processing is being upgraded to a currently exportable digital design by Sandia National Laboratories. Amplitude and phase histories will be collected during these overflights and digitized on VHS cassettes. Ground stations will use reduction algorithms to process the data and convert it to magnitude-detected images for member nations. System Planning Corporation is presently developing a portable ground station for use on the demonstration flights. Aircraft integration into the C-135 aircraft is being done by the Air Force at Wright-Patterson AFB, Ohio.

Cooper, D.W.; Murphy, M. [Sandia National Labs., Albuquerque, NM (United States); Rimmel, G. [Loral Defense Systems, Litchfield, AZ (United States)

1994-08-01T23:59:59.000Z

447

Heat pipe radiation cooling (HPRC) for high-speed aircraft propulsion. Phase 2 (feasibility) final report  

SciTech Connect (OSTI)

The National Aeronautics and Space Administration (NASA), Los Alamos National Laboratory (Los Alamos), and CCS Associates are conducting the Heat Pipe Radiation Cooling (HPRC) for High-Speed Aircraft Propulsion program to determine the advantages and demonstrate the feasibility of using high-temperature heat pipes to cool hypersonic engine components. This innovative approach involves using heat pipes to transport heat away from the combustor, nozzle, or inlet regions, and to reject it to the environment by thermal radiation from adjacent external surfaces. HPRC is viewed as an alternative (or complementary) cooling technique to the use of pumped cryogenic or endothermic fuels to provide regenerative fuel or air cooling of the hot surfaces. The HPRC program has been conducted through two phases, an applications phase and a feasibility phase. The applications program (Phase 1) included concept and assessment analyses using hypersonic engine data obtained from US engine company contacts. The applications phase culminated with planning for experimental verification of the HPRC concept to be pursued in a feasibility program. The feasibility program (Phase 2), recently completed and summarized in this report, involved both analytical and experimental studies.

Martin, R.A.; Merrigan, M.A.; Elder, M.G.; Sena, J.T.; Keddy, E.S. [Los Alamos National Lab., NM (United States); Silverstein, C.C. [CCS Associates, Bethel Park, PA (United States)

1994-03-25T23:59:59.000Z

448

Size distribution and chemical composition of aerosol particles in the free troposphere over Japan: Aircraft measurements  

SciTech Connect (OSTI)

Aircraft measurements of number-, mass- and volume-size distributions of aerosols and concentration of sulfate, nitrate and others contained in particulate matter were made in the free troposphere over Japan in 1991-1994. Number-size distribution frequently shows a peak in the area of a diameter of D {ge} 1 {mu}m in the free troposphere during observational periods. A few peaks are identified in the volume-size distribution as estimated on the basis of number-size distribution having single mode in a coarse range. Mass-size distribution frequently indicate enhancement in the coarse size range. This feature of the distribution is more frequent in those measurements made at 4.42 km than those at 2.29 km. On the basis of a backward trajectory analysis of the air mass containing those particles, soil particles originating from the Asian continent affect the features found in the size distributions as well as and vertical change in those size distributions. Particulate sulfate concentration in the free troposphere suggested that chemical transformation of particles with D {ge} 1 {mu}m advanced during long range transport of the particle possibly through coagulation of sulfate particles on coarse size particles such as Asian dust particles, adsorption of gaseous sulfate. Those measurements provide useful data et to discuss global geochemical cycle and radiative forcing of particles originated from the Asian continent.

Iwasaka, Y.; Mori, I.; Mastunga, K. [Nagoya Univ. (Japan)

1996-12-31T23:59:59.000Z

449

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

450

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

451

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

452

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

453

In-Situ Microphysics from the RACORO IOP  

SciTech Connect (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

2013-11-08T23:59:59.000Z

454

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

455

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

456

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

457

Structural FEM analysis of the strut-to-fuselage joint of a two-seat composite aircraft  

SciTech Connect (OSTI)

An analysis of a strut-to-fuselage joint is realized in order to evaluate the zones with a high probability of failure by means of a safety factor. The whole section is analyzed using the Finite Element Method (FEM) so as to estimate static resistance behavior, therefore it is necessary a numerical mock-up of the section, the mechanical properties of the Carbon-Epoxy (C-Ep) material, and to evaluate the applied loads. Results of the analysis show that the zones with higher probability of failure are found around the wing strut and the fuselage joint, with a safety factor lower than expected in comparison with the average safety factor used on aircrafts built mostly with metals.

Vargas-Rojas, Erik, E-mail: erikvargasrojas@hotmail.com; Camarena-Arellano, Diego, E-mail: erikvargasrojas@hotmail.com; Hernández-Moreno, Hilario, E-mail: erikvargasrojas@hotmail.com [IPN, ESIME Ticomán, Av. Ticomán 600, Col. San José Ticomán 07340 (Mexico)

2014-05-15T23:59:59.000Z

458

Comparison of improved Aura Tropospheric Emission Spectrometer (TES) CO{sub 2} with HIPPO and SGP aircraft profile measurements  

SciTech Connect (OSTI)

Comparisons are made between mid-tropospheric Tropospheric Emission Spectrometer (TES) carbon dioxide (CO{sub 2}) satellite measurements and ocean profiles from three Hiaper Pole-to-Pole Observations (HIPPO) campaigns and land aircraft profiles from the United States Southern Great Plains (SGP) Atmospheric Radiation Measurement (ARM) site over a 4-yr period. These comparisons are used to characterize the bias in the TES CO{sub 2} estimates and to assess whether calculated and actual uncertainties and sensitivities are consistent. The HIPPO dataset is one of the few datasets spanning the altitude range where TES CO{sub 2} estimates are sensitive, which is especially important for characterization of biases. We find that TES CO{sub 2} estimates capture the seasonal and latitudinal gradients observed by HIPPO CO{sub 2} measurements; actual errors range from 0.8–1.2 ppm, depending on the campaign, and are approximately 1.4 times larger than the predicted errors. The bias of TES versus HIPPO is within 0.85 ppm for each of the 3 campaigns; however several of the sub-tropical TES CO{sub 2} estimates are lower than expected based on the calculated errors. Comparisons of aircraft flask profiles, which are measured from the surface to 5 km, to TES CO{sub 2} at the SGP ARM site show good agreement with an overall bias of 0.1 ppm and rms of 1.0 ppm. We also find that the predicted sensitivity of the TES CO{sub 2} estimates is too high, which results from using a multi-step retrieval for CO{sub 2} and temperature. We find that the averaging kernel in the TES product corrected by a pressure-dependent factor accurately reflects the sensitivity of the TES CO{sub 2} product.

Kulawik, S. S.; Worden, J. R.; Wofsy, S. C.; Biraud, S. C.; Nassar, R.; Jones, D. B.A.; Olsen, E. T.; Osterman, G. B.

2012-02-01T23:59:59.000Z

459

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

460

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

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We encourage you to perform a real-time search of NLEBeta
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461

ARESE (ARM Enhanced Shortwave Experiment) Science Plan [Atmospheric Radiation Program  

SciTech Connect (OSTI)

Several recent studies have indicated that cloudy atmospheres may absorb significantly more solar radiation than currently predicted by models. The magnitude of this excess atmospheric absorption, is about 50% more than currently predicted and would have major impact on our understanding of atmospheric heating. Incorporation of this excess heating into existing general circulation models also appears to ameliorate some significant shortcomings of these models, most notably a tendency to overpredict the amount of radiant energy going into the oceans and to underpredict the tropopause temperature. However, some earlier studies do not show this excess absorption and an underlying physical mechanism that would give rise to such absorption has yet to be defined. Given the importance of this issue, the Department of Energy's (DOE) Atmospheric Radiation Measurement (ARM) program is sponsoring the ARM Enhanced Shortwave Experiment (ARESE) to study the absorption of solar radiation by clear and cloudy atmospheres. The experimental results will be compared with model calculations. Measurements will be conducted using three aircraft platforms (ARM-UAV Egrett, NASA ER-2, and an instrumented Twin Otter), as well as satellites and the ARM central and extended facilities in North Central Oklahoma. The project will occur over a four week period beginning in late September, 1995. Spectral broadband, partial bandpass, and narrow bandpass (10nm) solar radiative fluxes will be measured at different altitudes and at the surface with the objective to determine directly the magnitude and spectral characteristics of the absorption of shortwave radiation by the atmosphere (clear and cloudy). Narrow spectral channels selected to coincide with absorption by liquid water and ice will help in identifying the process of absorption of radiation. Additionally, information such as water vapor profiles, aerosol optical depths, cloud structure and ozone profiles, needed to use as input in radiative transfer calculations, will be acquired using the aircraft and surface facilities available to ARESE. This document outlines the scientific approach and measurement requirements of the project.

Valero, F.P.J.; Schwartz, S.E.; Cess, R.D.; Ramanathan, V.; Collins, W.D.; Minnis, P.; Ackerman, T.P.; Vitko, J.; Tooman, T.P.

1995-09-27T23:59:59.000Z

462

Imaging Molecular Gas in the Luminous Merger NGC 3256 : Detection of High-Velocity Gas and Twin Gas Peaks in the Double Nucleus  

E-Print Network [OSTI]

Molecular gas in the merging starburst galaxy NGC 3256 has been imaged with the Submillimeter Array at a resolution of 1'' x 2'' (170 x 340 pc at 35 Mpc). This is the first interferometric imaging of molecular gas in the most luminous galaxy within z=0.01. There is a large disk of molecular gas (r > 3 kpc) in the center of the merger with a strong gas concentration toward the double nucleus. The gas disk having a mass of ~3*10^9 Msun in the central 3 kpc rotates around a point between the two nuclei that are 850 pc apart on the sky. The molecular gas is warm and turbulent and shows spatial variation of the intensity ratio between CO isotopomers. High-velocity molecular gas is discovered at the galactic center. Its velocity in our line of sight is up to 420 km/s offset from the systemic velocity of the galaxy; the terminal velocity is twice as large as that due to the rotation of the main gas disk. The high-velocity gas is most likely due to a molecular outflow from the gas disk, entrained by the starburst-driven superwind in the galaxy. The molecular outflow is estimated to have a rate of ~10 Msun/yr and to play a significant role in the dispersal or depletion of molecular gas from the galactic center. A compact gas concentration and steep velocity gradient are also found around each of the twin nuclei. They are suggestive of a small gas disk rotating around each nucleus. If these are indeed mini-disks, their dynamical masses are ~10^9 Msun within a radius of 170 pc.

Kazushi Sakamoto; Paul T. P. Ho; Alison B. Peck

2006-03-03T23:59:59.000Z

463

Analysis of mixing layer heights inferred from radiosonde, wind profiler, airborne lidar, airborne microwave temperature profiler, and in-situ aircraft data during the Texas 2000 air quality study in Houston, TX  

E-Print Network [OSTI]

The mixing layer (ML) heights inferred from radiosondes, wind profilers, airborne lidar, airborne microwave temperature profiler (MTP), and in-situ aircraft data were compared during the Texas 2000 Air Quality Study in the Houston area...

Smith, Christina Lynn

2005-08-29T23:59:59.000Z

464

Ashtabula - Otter Tail Wind Farm | Open Energy Information  

Open Energy Info (EERE)

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465

Langdon II - Otter Tail Wind Farm | Open Energy Information  

Open Energy Info (EERE)

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466

Prevention of ice formation in light-aircraft-engine induction systems by using an automatic control to operate the carburetor-air heater  

E-Print Network [OSTI]

LIBRARY A A III COLLEGE OF TEXAS PREVENTION OF ICE FORMATION IN LIGHT-AIRCRAFT-EIEIINE INDUCTION SYSTEMS BY USING AN AUTOMATIC CONTROL TO OPERATE THE CARBURETOB AIR HEATER A Thesis GARLAND BISHOP MHISENHUNT & JR SuIm&itted to the Graduate... School of the Agricultural and Mechanioal College of Texas in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1955 MAJOR SUBJECT ' MECHANICAL ENGINEERING& PREVENTION OF ICE FORMATION IN LIGHT...

Whisenhunt, Garland Bishop

1955-01-01T23:59:59.000Z

467

Modelled Black Carbon Radiative Forcing and Atmospheric Lifetime in AeroCom Phase II Constrained by Aircraft Observations  

SciTech Connect (OSTI)

Black carbon (BC) aerosols absorb solar radiation, and are generally held to exacerbate global warming through exerting a positive radiative forcing1. However, the total contribution of BC to the ongoing changes in global climate is presently under debate2-8. Both anthropogenic BC emissions and the resulting spatial and temporal distribution of BC concentration are highly uncertain2,9. In particular, long range transport and processes affecting BC atmospheric lifetime are poorly understood, leading to large estimated uncertainty in BC concentration at high altitudes and far from emission sources10. These uncertainties limit our ability to quantify both the historical, present and future anthropogenic climate impact of BC. Here we compare vertical profiles of BC concentration from four recent aircraft measurement campaigns with 13 state of the art aerosol models, and show that recent assessments may have overestimated present day BC radiative forcing. Further, an atmospheric lifetime of BC of less than 5 days is shown to be essential for reproducing observations in transport dominated remote regions. Adjusting model results to measurements in remote regions, and at high altitudes, leads to a 25% reduction in the multi-model median direct BC forcing from fossil fuel and biofuel burning over the industrial era.

Samset, B. H.; Myhre, G.; Herber, Andreas; Kondo, Yutaka; Li, Shao-Meng; Moteki, N.; Koike, Makoto; Oshima, N.; Schwarz, Joshua P.; Balkanski, Y.; Bauer, S.; Bellouin, N.; Berntsen, T.; Bian, Huisheng; Chin, M.; Diehl, Thomas; Easter, Richard C.; Ghan, Steven J.; Iversen, T.; Kirkevag, A.; Lamarque, Jean-Francois; Lin, Guang; Liu, Xiaohong; Penner, Joyce E.; Schulz, M.; Seland, O.; Skeie, R. B.; Stier, P.; Takemura, T.; Tsigaridis, Kostas; Zhang, Kai

2014-11-27T23:59:59.000Z

468

Results of the radiological survey at the former Associate Aircraft Tool and Manufacturing Company site, Fairfield, Ohio (FOH001)  

SciTech Connect (OSTI)

At the request of the US Department of Energy (DOE), a team from oak Ridge National Laboratory conducted a radiological survey of the former Associate Aircraft Tool and Manufacturing Company facility, Fairfield, Ohio. The survey was performed in July and September 1992. The purpose of the survey was to determine if the facility had become contaminated with residuals containing radioactive materials during the work performed under government contract from February to September, 1956. The survey included gamma scanning over a circumscribed area around and outside of the building, and gamma scanning over most accessible indoor floor surfaces as well as the collection of soil and other samples for radionuclide analyses. Roof trusses were beta-gamma scanned in locations where floor contamination was found. Results of the survey demonstrated radionuclide concentrations in indoor and outdoor samples, and radiation measurements over floor and overhead surfaces, in excess of the DOE Formerly Utilized Sites Remedial Action Program guidelines. Elevated uranium concentrations outdoors were limited to several small, isolated spots. Radiation measurements exceeded guidelines indoors over numerous spots and areas inside the building, mainly in the areas that had been used in the early government work.

Murray, M.E.; Carrier, R.F.; Mathis, R.A.

1993-03-01T23:59:59.000Z

469

Twin Ridges | Open Energy Information  

Open Energy Info (EERE)

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470

A high-resolution, four-band SAR testbed with real-time image formation  

SciTech Connect (OSTI)

This paper describes the Twin-Otter SAR Testbed developed at Sandia National Laboratories. This SAR is a flexible, adaptable testbed capable of operation on four frequency bands: Ka, Ku, X, and VHF/UHF bands. The SAR features real-time image formation at fine resolution in spotlight and stripmap modes. High-quality images are formed in real time using the overlapped subaperture (OSA) image-formation and phase gradient autofocus (PGA) algorithms.

Walker, B.; Sander, G.; Thompson, M.; Burns, B.; Fellerhoff, R.; Dubbert, D.

1996-03-01T23:59:59.000Z

471

A polar stratospheric cloud parameterization for the global modeling initiative three-dimensional model and its response to stratospheric aircraft  

SciTech Connect (OSTI)

We describe a new parameterization of polar stratospheric clouds (PSCs) which was written for and incorporated into the three-dimensional (3-D) chemistry and transport model (CTM) developed for NASA's Atmospheric Effects of Aviation Project (AEAP) by the Global Modeling Initiative (GMI). The parameterization was designed to respond to changes in NO{sub y} and H{sub 2}O produced by high-speed civilian transport (HSCT) emissions. The parameterization predicts surface area densities (SADs) of both Type 1 and Type 2 PSCs for use in heterogeneous chemistry calculations. Type 1 PSCs are assumed to have a supercooled ternary sulfate (STS) composition, and Type 2 PSCs are treated as water ice with a coexisting nitric acid trihydrate (NAT) phase. Sedimentation is treated by assuming that the PSC particles obey lognormal size distributions, resulting in a realistic mass flux of condensed phase H{sub 2}O and HNO{sub 3}. We examine a simulation of the Southern Hemisphere high-latitude lower stratosphere winter and spring seasons driven by temperature and wind fields from a modified version of the National Center for Atmospheric Research (NCAR) Middle Atmosphere Community Climate Model Version 2 (MACCM2). Predicted PSC SADs and median radii for both Type 1 and Type 2 PSCs are consistent with observations. Gas phase HNO{sub 3} and H{sub 2}O concentrations in the high-latitude lower stratosphere qualitatively agree with Cryogenic Limb Array Etalon Spectrometer (CLAES) HNO{sub 3} and Microwave Limb Sounder (MLS) H{sub 2}O observations. The residual denitrification and dehydration of the model polar vortex after polar winter compares well with atmospheric trace molecule spectroscopy (ATMOS) observations taken during November 1994. When the NO{sub x} and H{sub 2}O emissions of a standard 500-aircraft HSCT fleet with a NO{sub x} emission index of 5 are added, NO{sub x} and H{sub 2}O concentrations in the Southern Hemisphere polar vortex before winter increase by up to 3%. This results in earlier onset of PSC formation, denitrification, and dehydration. Active Cl{sub y} increases and produces small ({approx}1%) decreases in lower stratospheric vortex O{sub 3} concentrations during the spring relative to the HSCT-free run. (c) 2000 American Geophysical Union.

Considine, D. B. [Earth System Science Interdisciplinary Center and Department of Meteorology, University of Maryland, College Park (United States)] [Earth System Science Interdisciplinary Center and Department of Meteorology, University of Maryland, College Park (United States); Douglass, A. R. [NASA Goddard Space Flight Center, Greenbelt, Maryland (United States)] [NASA Goddard Space Flight Center, Greenbelt, Maryland (United States); Connell, P. S. [Lawrence Livermore National Laboratory, Livermore, California (United States)] [Lawrence Livermore National Laboratory, Livermore, California (United States); Kinnison, D. E. [Lawrence Livermore National Laboratory, Livermore, California (United States)] [Lawrence Livermore National Laboratory, Livermore, California (United States); Rotman, D. A. [Lawrence Livermore National Laboratory, Livermore, California (United States)] [Lawrence Livermore National Laboratory, Livermore, California (United States)

2000-02-16T23:59:59.000Z

472

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

473

Aircraft collision models  

E-Print Network [OSTI]

Introduction: The threat of midair collisions is one of the most serious problems facing the air traffic control system and has been studied by many researchers. The gas model is one of the models which describe the expected ...

Endoh, Shinsuke

1982-01-01T23:59:59.000Z

474

P-3 B Aircraft  

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

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475

Synthetic aircraft turbine oil  

SciTech Connect (OSTI)

Synthetic lubricating oil composition having improved oxidation stability comprising a major portion of an aliphatic ester base oil having lubricating properties, formed by the reaction of pentaerythritol and an organic monocarboxylic acid and containing a phenylnaphthylamine, a dialkyldiphenylamine, a polyhydroxy anthraquinone, a hydrocarbyl phosphate ester and a dialkyldisulfide.

Yaffe, R.

1982-03-16T23:59:59.000Z

476

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

477

Analysis, testing, and operation of the MAGI thermal control system  

SciTech Connect (OSTI)

The Aerospace Corporation has completed the development of the Mineral and Gas Identifier (MAGI) sensor - an airborne multi-spectral infrared instrument that is designed to discriminate surface composition and to detect gas emissions from the environment. Sensor performance was demonstrated in a series of flights aboard a Twin Otter aircraft in December 2011 as a stepping stone to a future satellite sensor design. To meet sensor performance requirements the thermal control system was designed to operate the HgCdTe focal plane array (FPA) at 50 K with a 1.79 W heat rejection load to a 44.7 K sink and the optical assembly at 100 K with a 7.5 W heat load to a 82.3 K sink. Two commercial off-theshelf (COTS) Sunpower Stirling cryocoolers were used to meet the instrument’s cooling requirements. A thermal model constructed in Thermal Desktop was used to run parametric studies that guided the mechanical design and sized the two cryocoolers. This paper discusses the development, validation, and operation of the MAGI thermal control system. Detailed energy balances and temperature predictions are presented for various test cases to demonstrate the utility and accuracy of the thermal model. Model inputs included measured values of heat lift as a function of input power and cold tip temperature for the two cryocoolers. These measurements were also used to make predictions of the cool-down behavior from ambient conditions. Advanced heater software was developed to meet unique requirements for both sensor cool-down rate and stability at the set point temperatures.

Yi, Sonny; Hall, Jeffrey L.; Kasper, Brian P. [The Aerospace Corporation, El Segundo, CA 90245 (United States)

2014-01-29T23:59:59.000Z

478

Intelligent terrain avoidance agent for General Aviation Free Flight  

E-Print Network [OSTI]

Flight into Terrain. A simplistic conditional logic model was created and tested on a two-dimensional terrain slice. Then this algorithm was implemented with the dynamics of a Commander 700, a twin-engine general aviation aircraft. This algorithm...

Gesting, Paul

2013-02-22T23:59:59.000Z

479

A13G-0330: Evaluation of 3-dimensional winds measured by the Aircraft Integrated Meteorological Measurement System (AIMMS) Christopher G Kruse, David J Delene, and Cedric Grainger, University of North Dakota (christopher.kruse@und.edu)  

E-Print Network [OSTI]

A13G-0330: Evaluation of 3-dimensional winds measured by the Aircraft Integrated Meteorological, and IMU to derive the winds. The IMU and CPU were mounted in the cabin, the ADP was mounted under The time intervals and mean magnitude of vertical wind during the straight and level and porpoise maneuvers

Delene, David J.

480

Siamese Twins Terry McConnell  

E-Print Network [OSTI]

in the "three finger salute" 33 Morelia dinero 36 Big brother of Theodore in 60s TV 40 Mayberry village drunk 41 Before 6 Peeking at your classmate's work, for example 7 Thule native 8 Orient compatibly 9 Lifted, and things like that 41 TV channel 42 Mel Gibson title role 43 Remodeling needs 45 Host Conan and others 49

McConnell, Terry

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

Twin Cities Metro Advanced Practice Center  

E-Print Network [OSTI]

Fitted dust mask with NIOSH rating of N-95 or better for mold Protective clothing such as coveralls Wash cloths to cover mouth with wet cloth in event of an explosion or chemical incident CCoolldd ventilated to prevent toxic CO2 gas buildup. A 25-lb. block keeps a 10 cubic foot freezer cold for 3-4 days

482

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.

483

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

484

Twin Buttes Wind Farm | Open Energy Information  

Open Energy Info (EERE)

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485

Twin Creeks Technologies | Open Energy Information  

Open Energy Info (EERE)

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486

Twin Rivers Technologies | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop, IncTipmontInformationKentucky)Bank,Turkmenistan:Pwr Assn

487

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

488

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

489

Sandia National Laboratories: unmanned aircraft  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbineredox-activeNationalhydrogen components Energyunmanned

490

Microsoft PowerPoint - mather_twpice_data_status_ny.ppt  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces andMapping RichlandScattering PropertiesTechnique forTwin Otter

491

Investigating the Ecological Consequences of Sea Otter Recovery in the Central Coast  

E-Print Network [OSTI]

Hodgson, BC Parks and Protected Areas Eric Peterson & Christina Munck, Tula Foundation Report dated: March was also provided by Anne Salomon's Coastal Marine Ecology & Conservation (CMEC) Lab through Natural OF NORTHERN ABALONE Pilot Research Questions | Methods | Study Area | 9 Contemporary factors driving northern

492

Seasonal movement, home range, and habitat use of river otter in Southeastern Texas  

E-Print Network [OSTI]

Adult 208 54 a Season 6. 09 0. 0006 Winter 28 114 a Spring Summer 20 132 51 b 42 b Fall 122 60 b Diel Period Morning crepuscular 48 90 a 2. 62 0. 0503 Day 79 54 b Evening crepuscular 67 47 b Night 108 49 b 1 Means with the same letter... with decreasing temperature. Male home ranges averaged 400 ha while females averaged 295 ha. A significant difference between male and female home range size could be shown only when data for 1 old female was removed from the analysis. This animal was thought...

Foy, Michael Kerry

1984-01-01T23:59:59.000Z

493

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

494

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

495

Species diversity and foundation species: Potential indicators of fisheries yields and marine ecosystem functioning.  

E-Print Network [OSTI]

web interactions: sea otters and kelp forest fishes in thestrengthens trophic cascades in kelp forests by modifying1995. Sea otters and kelp forests in Alaska: generality and

Bracken, Matthew E.S.; Bracken, B. E.; Rogers-Bennett, Laura Dr.

2007-01-01T23:59:59.000Z

496

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

497

ASRS Database Report Set Parachutist / Aircraft Conflicts  

E-Print Network [OSTI]

be limited. The National Aeronautics and Space Administration and its ASRS current contractor, Booz Allen Hamilton, specifically disclaim any responsibility for any interpretation which may be made by others

498

Intelligent agent for aircraft collision avoidance  

E-Print Network [OSTI]

The trend of the air traffic system is toward a free flight environment. Free flight offers greater flexibility in planning for flights than the current air traffic control and management system. In free flight, operators are allowed to fly under...

Shandy, Surya Utama

2002-01-01T23:59:59.000Z

499

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

500

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